Free Dental Cephalometric Analysis Tool

NW Angle Society Analysis

July 01, 2026

Welcome to the final installment of our multi-part clinical cephalometric series at ceph.dentalorb.com. Over the past eleven posts, we have broken down foundational methods, growth forecasting, and advanced orthognathic surgical planning. Today, we are wrapping up the series by looking at an excellent, comprehensive regional standard: the NW Angle Society Analysis.

Utilized extensively by orthodontic study groups and structural societies, this analysis brings together high-yield measurements from classic diagnostic philosophies into a clean, highly reliable template. It serves as an ultimate diagnostic checklist for clinicians to ensure absolute structural balance and long-term occlusal stability.

Part 12: The Philosophy of the NW Angle Society Template

The NW Angle Society Analysis is structured around the core belief that orthodontic treatment must balance three critical facial components: the skeletal base, the dental occlusion, and the soft-tissue drape. Rather than introducing experimental reference lines, this method uses proven, stable planes—such as the Frankfort Horizontal and the Sella-Nasion plane—to cross-check patient data.

By checking multiple structural systems at once, the analysis provides an incredibly secure diagnostic workflow. It flags hidden jaw discrepancies or dental tipping early, ensuring your final treatment plan protects bone support, tooth health, and facial cosmetics.

📐 Core Structural Parameters & Clinical Norms

When you map your lateral cephalogram on the Dental Orb tracing engine, the software instantly runs the calculations to populate these vital categories:

I. Craniofacial Skeittal Mapping

SNA & SNB Angles [Norms: 82° / 80°]: Measures the anteroposterior positioning of the upper and lower jaw bases relative to the cranial base line.
ANB Angle [Norm: 2°]: The direct skeletal difference between the upper and lower jaw limits. Angles greater than 4° point to Class II skeletal patterns, while angles below 0° indicate a Class III jaw architecture.

II. Skeletal Vertical Growth & Alignment

FMA (Frankfort-Mandibular Plane Angle) [Norm: 25°]: Evaluates the steepness of the lower jaw relative to the Frankfort horizontal plane. High angles signal hyperdivergent vertical patterns, while lower angles reveal strong horizontal hypodivergent patterns.
SN-MP Angle [Norm: 32°]: Evaluates the lower jaw border relative to the Sella-Nasion line to confirm vertical growth trends.

III. Dentoalveolar Alignment & Compensation

Interincisal Angle (U1 to L1) [Norm: 135°]: The internal angle formed between the long axes of the upper and lower central front teeth. Small, acute angles reveal severe dental flaring or bimaxillary protrusion.
IMPA (Incisor-Mandibular Plane Angle) [Norm: 90°]: The tilt of the lower front teeth relative to the lower jaw border. This is a critical factor for predicting post-treatment dental stability and bone support.

IV. Aesthetic Soft Tissue Harmony

Lips to E-Line / S-Line [Norm: Balanced Profile]: Evaluates the soft-tissue drape of the upper and lower lips relative to the nose and chin projections to safeguard the patient's final aesthetic profile line.

💻 How to Run NW Angle Society Analysis on Ceph.DentalOrb.com

Our web platform runs all structural geometry calculations securely and locally in your web browser:

Step 1: Upload and Select Module
Open ceph.dentalorb.com, upload your digital lateral cephalogram, and choose NW Angle Society Analysis from the dropdown menu in the toolbar.

Step 2: Workspace Calibration
Click the 📏 Calibrate button. Trace your digital image's physical calibration grid to map out the exact scale for precise linear millimeter output.

Step 3: Map the Skeletal & Dental Points
Click Rx Analyze. Follow the clear text cues on the screen overlay to plot the required points sequentially (S, N, Po, Or, A, B, Pog, Go, Me, along with upper and lower incisor tips and roots, and soft tissue boundaries).

Step 4: Generate the Final Diagnostic Report
The moment the last point is clicked, the tool automatically compiles the data and fills out the sidebar table. Critical structural deviations are highlighted in red to guide your setup mechanics. Click Print to generate a clean, printer-friendly PDF to add to your patient's chart.

Thank You for Supporting Dental Orb: We are proud to provide this entire 12-module, cloud-free cephalometric tracing software completely free of licensing fees. To help us maintain our web servers and fund advanced updates, please take a brief moment to view the advertisements displayed on this page. Your active support ensures this diagnostic resource remains open and free for practitioners, students, and educators worldwide!

Thank you for following along with our complete, 12-part online cephalometric breakdown series! Keep exploring your cases on ceph.dentalorb.com, and let us know your feedback or feature requests in the comments section below.

McNamara Analysis

July 01, 2026

Welcome back to our clinical cephalometric breakdown series at ceph.dentalorb.com. In our previous posts, we broke down the bone and soft-tissue coordinate mapping used in surgical planning. Today, we are exploring a highly popular system that combines skeletal relations, growth changes, and airway analysis into a highly intuitive framework: the McNamara Analysis.

Developed by Dr. James A. McNamara Jr. in 1984, this analysis became incredibly popular worldwide because it uses simple, easy-to-understand linear measurements. Instead of relying heavily on angles that can be skewed by a shifting skull base, McNamara constructed a true vertical line to pinpoint exactly how the teeth, jaws, and airway space relate to the rest of the face.

Part 11: The Philosophy of McNamara's Nasion Vertical Line

The defining feature of McNamara's method is the use of the Nasion Vertical Line. This is a reference line drawn completely perpendicular to the Frankfort Horizontal Plane, dropping straight down from Nasion.

McNamara used this vertical drop-line to assess the horizontal position of both the upper and lower jaws. By measuring the horizontal distance from this line to the maxilla and mandible in millimeters, clinicians get an un-skewed reading of jaw protrusion or recession. Furthermore, McNamara included vital dimensions to track lower face height and internal airway spaces, making it a stellar analysis for managing pediatric expansion, functional orthopedics, and sleep apnea cases.

📐 Core McNamara Parameters & Clinical Norms

When you map your digital cephalogram using the Dental Orb platform, the tool instantly generates your patient's linear values compared against these definitive standards:

I. Skeletal Positions relative to the Nasion Vertical

Maxillary Position (Point A to Nasion Vertical) [Norm: +1.0 mm]: Measures how far ahead or behind the upper jaw sits relative to the vertical line.
Interpretation: Positive values greater than 3mm indicate maxillary protrusion; negative values indicate maxillary retrognathia.
Mandibular Position (Pogonion to Nasion Vertical) [Norm: -8.0 mm to 0.0 mm (dependent on age/size)]: Measures the chin position relative to the vertical line.
Interpretation: A highly negative value indicates mandibular retrognathia (receded lower jaw), a classic indicator for functional appliance therapy in growing children.

II. Jaw Lengths & Structural Midface Compatibility

Effective Midfacial Length (Condylion to Point A) [Norm: Mixed dentition ~85mm]: Measures the absolute length of the upper face segment.
Effective Mandibular Length (Condylion to Gnathion) [Norm: Mixed dentition ~105mm]: Measures the absolute horizontal length of the lower jaw from the joint condyle to the chin. McNamara looks at the direct mathematical relationship *between* midfacial and mandibular lengths to see if the jaws are structurally proportional.

III. Airway Assessment Fields

Upper Pharyngeal Width [Norm: 15.0 mm to 20.0 mm]: Measures the minimum clearance distance from the posterior surface of the soft palate to the posterior pharyngeal wall. A severely restricted upper airway space often points to adenoid hypertrophy.
Lower Pharyngeal Width [Norm: 11.0 mm to 14.0 mm]: Measures the space between the lower border of the tongue and the posterior pharyngeal wall, highlighting narrow spaces that can contribute to obstructive sleep apnea (OSA).

💻 How to Run McNamara Analysis on Ceph.DentalOrb.com

Our secure, local browser engine computes these multi-dimensional linear and airway steps smoothly:

Step 1: Upload and Analysis Setup
Open ceph.dentalorb.com, upload your digital lateral cephalogram, and choose McNamara Analysis from the dropdown menu in the toolbar.

Step 2: Linear Millimeter Calibration
Because McNamara relies extensively on exact millimeter dimensions for both jaw lengths and airway checks, click the 轴 Calibrate button and trace your 10mm spatial reference line carefully.

Step 3: Point Mapping & Airway Tracking
Click Rx Analyze. Follow the clear text cues on the screen overlay to plot your points. This module will guide you through standard landmarks (N, A, B, Pog, Gn, Me, Go, Po, Or, Co) and then ask you to click the specific airway borders along the soft palate and pharyngeal walls to measure airway patency.

Step 4: Evaluate Your Diagnostic Sheet
The moment the final landmark is set, the software projects the Nasion Vertical Line and displays the millimeter discrepancies in your sidebar. Clear red flags will appear if your patient shows skeletal discrepancies or restricted pharyngeal dimensions. Click Print to generate a clean PDF output for your clinical chart.

Help Us Maintain These Open-Access Tools: We provide this advanced, offline-first digital tracing program free of licensing costs to dental practitioners and students worldwide. If this tool enhances your diagnostic capabilities or educational studies, please support us by taking a brief moment to view the advertisements displayed on this page. Your engagement covers our server costs and directly funds future updates like automated AI landmark detection!

In Part 12—the final installment of our cephalometric series—we will look at the comprehensive structural norms of the **NW Angle Society Analysis**! If you have any clinical feedback or questions, leave them in the comments section below.

COGS Analysis - Soft Tissue

July 01, 2026

Welcome back to our clinical cephalometric series at ceph.dentalorb.com. In our previous post, we looked at the structural bone coordinates of Burstone's COGS Hard Tissue Analysis. Today, we are breaking down the final piece of the orthognathic planning puzzle: the Cephalometric for Orthognathic Surgery (COGS) Soft Tissue Analysis.

While moving bone segments fixes the skeletal defect, the ultimate success of an orthognathic operation is judged by how the soft tissue responds. Developed by Dr. Charles J. Burstone and his team, this specialized analysis maps the soft-tissue drape in absolute millimeters. It allows oral surgeons and orthodontists to accurately forecast how surgical bone movements will alter a patient's final lip position, nose angle, and facial aesthetics.

Part 10: Predicting Post-Surgical Aesthetic Changes

When an oral surgeon advances the maxilla bone forward by 5mm, the upper lip does not always move forward by that exact same amount; soft tissue compresses, stretches, and slides based on its unique thickness. The COGS Soft Tissue framework uses a highly systematic linear grid to evaluate these changes.

By measuring the precise horizontal thickness and vertical length of the lips, chin drape, and submental area, this analysis tells the surgical team exactly how much soft-tissue change to expect. This ensures the patient experiences optimal lip competence, vertical facial balance, and a natural, harmonious profile line after healing.

📐 Core Soft Tissue Parameters & Surgical Norms

When you complete the landmark plotting sequence on the Dental Orb tool, your report will immediately calculate your patient's soft-tissue drape against Burstone's established aesthetic norms:

I. Facial Profile and Sagittal Soft Tissue Lines

Soft Tissue Facial Convexity (Glabella to Subnasale to Soft Chin) [Norm: Male 12.0 mm / Female 13.0 mm]: Measures the overall curvature of the soft-tissue profile from the forehead down to the chin drape. This is the ultimate baseline for facial profile balance.
Nasal Projection (Subnasale to Nose Tip) [Norm: Male 18.0 mm / Female 16.0 mm]: Measures how far the nose sticks out horizontally. It is vital for evaluating whether a retrognathic look is caused by jaw position or an over-prominent nose.

II. Lip Dimensions, Thickness, and Competence

Upper Lip Thickness (Point A to Labrale Superius) [Norm: Male 12.8 mm / Female 12.1 mm]: Establishes the absolute horizontal cushion of the upper lip. Knowing this thickness helps predict how much the lip will move forward during a Le Fort I advancement.
Lower Lip Thickness (Point B to Labrale Inferius) [Norm: Male 13.5 mm / Female 12.8 mm]: Establishes the thickness of the lower lip.
Interlabial Gap (Distance between Upper and Lower Lip at rest) [Norm: 2.0 mm]: Measures lip competence. A high interlabial gap means the patient must strain their muscles to close their mouth, which can be fixed by vertically impacting the jaw.

III. Throat and Submental Aesthetics

Throat Axis Length (Submental Length) [Norm: Male 42.0 mm / Female 38.0 mm]: Measures the soft-tissue length under the chin. Advancing a receded lower jaw lengthens this line, significantly sharpening a patient's neck-to-chin profile angle.

💻 How to Run COGS Soft Tissue Analysis on Ceph.DentalOrb.com

Our secure web engine processes these advanced linear coordinate changes locally in your web browser:

Step 1: Upload and Select Module
Open ceph.dentalorb.com, upload your digital lateral cephalogram, and choose COGS Analysis - Soft Tissue from the dropdown menu in the toolbar.

Step 2: Linear Calibration Validation
Because this analysis reads structural thickness and lip gaps in absolute millimeters, click the 📏 Calibrate button and trace your X-ray's physical 10mm grid line to calibrate the system.

Step 3: Plot the Aesthetic Landmarks
Click Rx Analyze. Follow the clear text cues on the screen overlay to plot the required soft-tissue points sequentially: Glabella (G), Subnasale (Sn), Soft Pogonion, Upper and Lower Lip points, Stomion, Columella, and the submental throat coordinates.

Step 4: Evaluate Your Surgical Aesthetic Chart
Once the final coordinate is set, the tool instantly processes the numbers and displays your soft-tissue profile report in the sidebar. Deviations from ideal aesthetic proportions are highlighted in red to guide your pre-surgical setups. Click Print to generate a clean PDF chart for your records.

Help Us Maintain These Diagnostic Resources: We are committed to providing advanced, secure, and privacy-respecting dental software free of licensing costs. If this software simplifies your surgical case planning or educational study, please support us by taking a brief moment to view the advertisements displayed on this page. Your engagement covers our server costs and directly funds future AI automated updates!

In Part 11 of our guide, we will step into advanced orthopedic tracking and airway assessment with the comprehensive **McNamara Analysis**! If you have any clinical feedback or feature requests, let us know in the comments below.

COGS Analysis - Hard Tissue

July 01, 2026

Welcome back to our clinical cephalometric series at ceph.dentalorb.com. In our previous post, we looked at the soft-tissue aesthetic principles of Mahony Analysis. Today, we are transitioning from traditional orthodontics into the realm of maxillofacial surgery as we break down the definitive system for orthognathic surgical planning: the Cephalometric for Orthognathic Surgery (COGS) Hard Tissue Analysis.

Developed by Dr. Charles J. Burstone and his colleagues in 1978, the COGS analysis was groundbreaking because it replaced traditional angular measurements with a highly accurate linear coordinate system. This layout allows oral surgeons and orthodontists to map out bone alterations in exact millimeters, making it the global blueprint for planning surgical jaw movements.

Part 9: The Philosophy of COGS Coordinate Planning

Traditional analyses rely heavily on angles (like SNA or SNB), which can be highly distorted by variations in skull size or changes in the cranial base. For an oral and maxillofacial surgeon planning to physically move a jaw bone, angles are difficult to translate into precise surgical steps.

Dr. Burstone solved this by constructing a horizontal reference plane and measuring bones along an X and Y coordinate grid. The COGS framework measures the exact length, height, and position of individual bone segments (maxilla, mandibular ramus, chin symphysis) in millimeters. This tells the surgical team precisely how many millimeters to advance, recede, or impact a jaw bone during procedures like a Le Fort I osteotomy or a Bilateral Sagittal Split Osteotomy (BSSO).

📐 Core Hard Tissue Parameters & Surgical Norms

When you complete the landmark plotting sequence on the Dental Orb tool, your report will immediately calculate your patient's hard-tissue segments against Burstone's surgical norms:

I. Maxillary and Craniofacial Bones (Sagittal and Vertical)

Maxillary Length (Ptm to Point A) [Norm: Male 52.8 mm / Female 49.8 mm]: Measures the physical horizontal length of the upper jaw bone from the pterygomaxillary fissure to the front profile limit. It determines whether a discrepancy is caused by a small or large maxilla.
Anterior Maxillary Position (N-Pgp to Point A) [Norm: 0.0 mm]: Measures the forward position of the upper jaw bone relative to a true vertical reference drop-line.

II. Mandibular Skeletal Components

Mandibular Corpus Length (Gonion to Pogonion) [Norm: Male 84.1 mm / Female 78.9 mm]: Measures the horizontal length of the lower jaw body itself. This distinguishes true mandibular retrognathia (a short jaw bone) from a correctly sized jaw that sits too far backward.
Ramus Height (Articulare to Gonion) [Norm: Male 52.0 mm / Female 46.8 mm]: Measures the vertical height of the lower jaw ramus, which is essential for correcting vertical facial asymmetries and deep-bite skeletons.

III. Vertical Facial Heights

Upper Anterior Facial Height (Nasion to ANS) [Norm: Male 54.8 mm / Female 50.3 mm]: Tracks the vertical spacing of the mid-face.
Lower Anterior Facial Height (ANS to Menton) [Norm: Male 69.9 mm / Female 61.3 mm]: Measures the vertical dimension of the lower third of the face, which is vital for planning vertical surgical impactions to fix gummy smiles.

💻 How to Run COGS Hard Tissue Analysis on Ceph.DentalOrb.com

Our secure web tool executes the advanced linear coordinate mathematics for surgical planning directly inside your web browser:

Step 1: Upload and Select Surgical Module
Open ceph.dentalorb.com, upload your digital lateral cephalogram, and choose COGS Analysis - Hard Tissue from the dropdown selection menu in the toolbar.

Step 2: Micro-Millimeter Scale Calibration
Because the COGS system relies entirely on absolute linear millimeter values for surgical planning, click the 📏 Calibrate button. Trace your image's physical calibration grid carefully to guarantee absolute mathematical precision.

Step 3: Plot the Surgical Landmarks
Click Rx Analyze. Follow the visual prompts in the screen overlay box to click your structural points. This specialized module will guide you through placing precise anatomical markers (S, N, Po, Or, Ar, Ptm, A, B, Pog, Gn, Go, Me, ANS, PNS, along with molar and incisor coordinates).

Step 4: Analyze Your Surgical Dimensions
Once the final point is set, the tool instantly maps the coordinate system directly onto your digital X-ray and populates the millimeter grid in the sidebar. Deviations from normal clinical values are highlighted instantly to help you plan your orthopedic or surgical movements. Click Print to generate a clean PDF output for your case presentation.

Help Us Maintain These Free Diagnostic Tools: We are proud to provide this advanced, cloud-free surgical tracing engine completely free of licensing costs to dental practitioners, students, and surgical teams worldwide. If this tool enhances your diagnostic capabilities or educational study, please support us by taking a brief moment to view the advertisements displayed on this page. Your engagement covers our server costs and directly funds future AI automation modules!

In Part 10 of our guide, we will look at the final piece of the surgical planning puzzle using the **COGS Soft Tissue Analysis** to track aesthetic changes in the lips and profile! If you have any clinical feedback or feature requests, let us know in the comments below.

Mahony / Fullface Analysis

July 01, 2026

Welcome back to our clinical cephalometric series at ceph.dentalorb.com. In our previous post, we looked at the dental-skeletal ratios of Bondi Analysis. Today, we are focusing on a modern system that prioritizes soft-tissue drape, facial balance, and treatment mechanics that work with the patient's natural profile: Mahony / Fullface Analysis.

Developed by Dr. Derek Mahony, a world-renowned orthodontist, this analysis brings soft-tissue facial aesthetics to the forefront of diagnostic planning. Rather than looking exclusively at hard tissue angles, the Fullface method evaluates how the teeth and jaws support the lips, nose, and chin, helping you design highly individualized treatment mechanics.

Part 8: Understanding the Mahony Fullface Philosophy

The core concept behind Mahony's analysis is that a stable, beautiful orthodontic outcome depends on the soft-tissue profile. Moving teeth to look perfect on a bone template is counterproductive if it collapses the upper lip or flattens the profile.

To prevent this, the Mahony Fullface framework links skeletal positions directly to facial aesthetics. It cross-checks soft-tissue vertical proportions against hard-tissue values, giving clinicians a highly sensitive guide to determine whether non-extraction, extraction, or orthognathic surgical options will yield the most stable and balanced look.

📐 Core Parameters & Clinical Norms

When you map your cephalogram using the Dental Orb engine, the software instantly calculates your patient's metrics across these integrated structural categories:

I. Sagittal Balance & Core Skeletal Angles

SNA & SNB Angles [Norms: 82° / 80°]: Tracks the anteroposterior position of the upper and lower jaws relative to the stable Sella-Nasion cranial reference plane.
ANB Differential [Norm: 2°]: Revels the underlying skeletal jaw relationship. Angles above 4° represent Class II patterns, while angles below 0° point to a Class III jaw architecture.

II. Vertical Facial Proportions & Height

Lower Anterior Facial Height (ANS-Me) [Norm: Individualized]: Evaluates the vertical proportion of the lower face. Dr. Mahony stresses matching this lower facial space to the middle facial third for optimal aesthetics.
Mandibular Plane Steepness (S-N to Go-Me) [Norm: 32°]: Tracks the growth direction of the mandible. High vertical angles highlight hyperdivergent, long-face patterns, while flat planes point to hypodivergent growth.

III. Soft Tissue Profile & Lip Support

Nasolabial Angle [Norm: 102° (±8°)]: The critical angle between the base of the nose and the upper lip contour. A sharp, acute angle suggests a protruding maxilla or flared front teeth, while an open, obtuse angle reveals a flat upper lip requiring profile support.
Soft Tissue E-Line and S-Line Relations: Evaluates how protrusive or retrusive the upper and lower lips appear relative to the nose and chin, guiding space management during alignment.

💻 How to Run Mahony / Fullface Analysis on Ceph.DentalOrb.com

Our web platform calculates these sensitive aesthetic and geometric metrics locally and securely in your web browser:

Step 1: Upload and Module Setup
Open ceph.dentalorb.com, upload your digital lateral cephalometric X-ray, and choose Mahony / Fullface Analysis from the dropdown menu in the toolbar.

Step 2: Calibrate the Workspace Scale
Because soft-tissue analysis relies on accurate linear millimeter distances, click the 📏 Calibrate button and trace your X-ray's 10mm reference scale marker.

Step 3: Sequential Landmark Mapping
Click Rx Analyze. Look at the top black instruction overlay. The interface will guide you through placing standard cranial points (S, N, Ar, Co), jaw boundaries (A, B, ANS, PNS, Go, Me, Pog), incisor points, and crucial soft tissue markers (Nose tip, Subnasale, Lips, and Soft Chin).

Step 4: Analyze Your Fullface Report
Once your final soft-tissue coordinate is set, the tool immediately builds your comprehensive profile report. Critical deviations are marked in red to help you plan your extraction or space-closure mechanics. Click Print to create a clean PDF chart for your records.

Help Us Maintain These Advanced Tools: We are fully committed to keeping our advanced, secure, and privacy-respecting dental diagnostic platforms free of subscription costs. If this software streamlines your case planning or educational study, please take a brief moment to view the advertisements displayed on this page. Your support covers our hosting and directly keeps these tools open to practitioners worldwide!

In Part 9 of our guide, we will step into advanced orthognathic surgical planning and structural mapping using the highly specialized **COGS Hard Tissue Analysis**! If you have any clinical questions or feedback, leave them in the comments section below.

Bondi Analysis

July 01, 2026

Welcome back to our clinical cephalometric breakdown series at ceph.dentalorb.com. In our previous post, we looked at the orthopedic growth prediction fields of Ricketts Analysis. Today, we are exploring a comprehensive approach that brings structural clarity to multi-dimensional profile mapping: Bondi Analysis.

Developed to integrate key diagnostic components from several classic analyses into a unified, high-predictability template, Bondi Analysis focuses on establishing crisp dental-to-skeletal ratios. It serves as an exceptional framework for clinicians looking to achieve a highly balanced and stable functional occlusion while protecting the patient's soft-tissue profile.

Part 7: The Core Concepts of Bondi Analysis

The Bondi framework treats the craniofacial profile as an interdependent architectural structure. Instead of looking at skeletal jaw bases or dental positions in isolation, it runs deep geometric cross-checks across three core areas:

Skeletal Base Orientation: How the upper and lower jaws sit relative to the cranial base reference lines.
Dentoalveolar Compensation: How the teeth have naturally tilted or shifted to compensate for any underlying skeletal jaw discrepancies.
Soft Tissue Drape: How the lips, nose, and chin contours overlay the underlying hard tissues, establishing the final facial aesthetics.

By creating a consolidated profile map, Bondi Analysis helps practitioners pinpoint exactly whether a malocclusion is primarily skeletal, dental, or a combination of both, leading to highly targeted mechanical treatment plans.

📐 Core Measurements & Diagnostic Ranges

When you complete the landmark plotting sequence on the Dental Orb tool, your report will immediately populate these integrated Bondi parameters:

I. Sagittal and Craniofacial Skeletal Mapping

SNA and SNB Angles [Norms: 82° / 80°]: Tracks the anteroposterior positioning of the maxilla and mandible relative to the anterior cranial base (Sella-Nasion line).
ANB Angle [Norm: 2°]: The direct skeletal difference between the upper and lower jaw limits. Values greater than 4° indicate Class II jaw patterns; values less than 0° indicate Class III jaw configurations.

II. Vertical Skeletal and Geometry Parameters

Cranial Base Flexion (N-S-Ba Angle) [Norm: 130°]: Evaluates the bending angle of the skull base, which structurally influences how forward or backward the temporomandibular joint (TMJ) sits.
Mandibular Base Angulation (Go-Me to S-N) [Norm: 32°]: Evaluates vertical or horizontal jaw growth patterns. High vertical angles indicate hyperdivergent patterns; flat angles show hypodivergent patterns.

III. Dentoalveolar Alignment and Compensation

Interincisal Angle / U1-to-L1 [Norm: 135°]: The internal angle formed between the long axes of the upper and lower front teeth. Acute angles indicate significant dental flaring (proclination).
Incisor-to-Base Relations (U1-to-NA and L1-to-NB): Quantifies both the angular tilt (inclination) and linear distance (protrusion) of the central incisors relative to their respective supporting jaw bones.

💻 How to Run Bondi Analysis on Ceph.DentalOrb.com

Our offline-first web tool executes the complex trigonometric calculations for Bondi's integrated parameters entirely inside your web browser:

Step 1: Upload and Select Module
Open ceph.dentalorb.com, upload your digital lateral cephalometric X-ray, and choose Bondi Analysis from the dropdown selection menu in the toolbar.

Step 2: Trace the 10mm Calibration Ruler
Click the 📏 Calibrate button. Trace your image's physical calibration grid to map out the exact scale for precise millimeter readouts.

Step 3: Plot the Integrated Landmarks
Click Rx Analyze. Follow the clear text cues on the screen overlay to plot the required points sequentially: skull base landmarks (S, N, Ba), jaw limits (A, B, ANS, PNS, Go, Me, Pog), tooth landmarks (U1 and L1 tips/roots), and soft-tissue profile markings.

Step 4: Review and Export the Consolidated Chart
Once the final soft-tissue point is clicked, the tool instantly processes the data and generates your multi-dimensional report in the sidebar. Green highlights indicate balanced relationships, while Red indicates structural deviations. Click Print to generate a clean PDF chart for clinical compilation.

Help Keep Dental Orb Open and Free: We are proud to provide this privacy-centric, advanced tracing engine completely free of licensing fees to the global dental community. If this software simplifies your clinical data compilation or educational study, please support us by taking a brief moment to view the advertisements displayed on this page. Your support helps cover our high-performance hosting and directly funds future AI automated updates!

In Part 8 of our guide, we will explore the specific components of Mahony / Fullface Analysis for advanced soft-tissue profile and facial balance mapping! If you have any clinical feedback, let us know in the comments below.

Ricketts Bioprogressive Analysis

July 01, 2026

Welcome back to our clinical cephalometric breakdown series at ceph.dentalorb.com. In our previous post, we looked at the individualized floating norms of the Segner / Hasund method. Today, we are breaking down a highly comprehensive system designed for orthopedic growth prediction and visual treatment charting: Ricketts Bioprogressive Analysis.

Developed by Dr. Robert M. Ricketts in the 1960s and 1970s, this analysis revolutionized orthodontics by introducing computerized growth forecasting and treating the craniofacial complex as a fluid, growing system. It remains a cornerstone for clinicians who utilize orthopedic appliances or plan orthognathic surgical corrections.

Part 6: The Philosophy of the Ricketts Analysis

Unlike other conventional analyses that solely evaluate individual angles, Dr. Ricketts prioritized structural fields. He emphasized tracing lines to locate a unique internal jaw pivot called the Xi Point (the geometric center of the mandibular ramus).

By mapping structural relationships relative to specific reference lines like the **Basion-Nasion Line** (cranial base reference) and his famous **E-Line** (Esthetic Line), Ricketts provided a clear framework to answer three critical clinical questions:

Where is the structural skeletal discrepancy?
How will the face grow if left untreated?
Where must the teeth be moved to achieve ideal soft-tissue facial harmony?

📐 The Core Parameters & Clinical Norms

When you complete the landmark plotting sequence on Dental Orb, the system segments the analysis into clear diagnostic fields:

I. Skeletal Profile & Chin Position

Facial Convexity (Point A to N-Pog Line) [Norm: +2.0 mm]: Measures the skeletal protrusion of the upper jaw relative to the total facial profile line.
Interpretation: High positive values indicate a Class II skeletal pattern (protrusive maxilla or retrognathic mandible). Negative values point to a Class III skeletal pattern.
Facial Depth Angle (FH to N-Pog) [Norm: 87°]: Determines the horizontal position of the chin relative to the cranial base plane.
Interpretation: An increased angle represents a strong, prognathic chin; a decreased angle shows a retrognathic chin profile.

II. Vertical Growth Pattern

Mandibular Plane Angle (FH to Mandibular Plane) [Norm: 26°]: Evaluates the vertical inclination of the lower jaw base.
Interpretation: High angles indicate vertical, hyperdivergent growth patterns (open bite tendency), while low angles indicate deep-bite, hypodivergent configurations.
Mandibular Arc (Angle formed by Condyle Axis and Ramus Axis) [Norm: 26°]: Evaluates the internal structural shape of the lower jaw. A high mandibular arc indicates a powerful, square jaw with strong horizontal growth potential.

III. Soft Tissue Profile & Aesthetics

Lips to E-Line (Esthetic Line) [Norm: Upper Lip -2.0 mm / Lower Lip -2.0 mm]: Ricketts' Esthetic Line draws a straight line connecting the tip of the nose (Pronasale) to the soft-tissue chin projection (Soft Pogonion).
Interpretation: Lips resting far ahead of this line are considered protrusive (bimaxillary protrusion), whereas lips resting significantly behind it indicate a flat or retruded facial profile. This is an incredibly sensitive guide for determining extraction versus non-extraction treatment protocols.

💻 How to Run Ricketts Analysis on Ceph.DentalOrb.com

Our offline-first web engine handles the advanced coordinate transformations required for Ricketts' specific landmarks directly inside your web browser:

Step 1: Upload and Analysis Selection
Open ceph.dentalorb.com, upload your digital lateral cephalogram, and choose Ricketts Analysis from the dropdown menu in the toolbar.

Step 2: Linear Calibration
Because Ricketts relies heavily on accurate linear millimeter measurements (such as Facial Convexity), click the 📏 Calibrate button and map your 10mm spatial reference bar.

Step 3: Map Anatomic and Internal Ramus Points
Click Rx Analyze. Follow the visual prompts in the top black overlay box to click the landmarks. This advanced module will guide you through placing standard references (N, Ba, Po, Or, A, ANS, PNS, Pog, Gn, Go, Me), tooth positions, and specific ramus landmarks to help map out internal structural coordinates.

Step 4: Evaluate Your Visual Report
Once the final point is captured, the system automatically plots the vectors and populates the sidebar table. Deviations from normal clinical values are highlighted instantly to help you structure your orthopedic mechanics. Click Print to generate a clean PDF output for your case presentation.

Support Free Medical Software Development: We provide this advanced, cloud-free cephalometric tracing engine completely free of licensing costs to dental practitioners and students worldwide. If this tool enhances your diagnostic capabilities or educational study, please support us by taking a brief moment to view the advertisements displayed on this page. Your engagement covers our server costs and directly funds future AI automation modules!

In Part 7 of our guide, we will explore the specific components of Bondi Analysis for multi-dimensional profile mapping! If you have any clinical feedback or feature requests, let us know in the comments below.

Segner / Hasund Comprehensive Analysis

July 01, 2026

Welcome back to our clinical cephalometric breakdown series at ceph.dentalorb.com. In our previous post, we looked at growth direction using the Bjork-Jarabak method. Today, we are breaking down a highly sophisticated European system built entirely around individual anatomic harmony: the Segner / Hasund Analysis.

Developed by Dr. Aas Hasund and later refined by Dr. Jörn Segner, this analysis moved orthodontics away from strict, static population averages. Instead, it recognizes that a person's "normal" jaw position depends entirely on their other facial features. It uses a floating system of structural harmony to give you an incredibly personalized diagnostic reading.

Part 5: The Philosophy of Segner / Hasund Floating Norms

Traditional analyses say that an SNA angle of 82° is always ideal. However, Segner and Hasund demonstrated that if a patient has a long or short cranial base, or a steep skull base angle, an SNA of 85° or 79° might actually be perfectly harmonized for *their* specific face.

The Segner / Hasund method evaluates the face across three comprehensive dimensions: Sagittal jaw relations, Vertical skeletal planes, and a detailed Soft-tissue profile assessment. This comprehensive approach gives clinicians an unmatched view of structural balance and soft-tissue harmony.

📐 Core Parameters & Clinical Interpretations

When you complete the landmark plotting sequence on Dental Orb, the system immediately calculates your patient's specialized values across these clinical sectors:

I. Sagittal Relations & Wits Appraisal

SNA & SNB Angles [Norms: 82° / 80°]: Evaluates the forward or backward positioning of the upper and lower jaws relative to the skull base line.
ANB Angle [Norm: 2°]: Shows the structural difference between the upper and lower jaw bases, establishing whether the patient fits a Skeletal Class I, II, or III category.
Wits Appraisal [Norm: 0 mm]: Projects Points A and B perpendicularly onto the occlusal plane. This acts as a vital double-check to ensure that a steep skull base angle isn't masking a severe jaw discrepancy.

II. Vertical Plane Intersections

NSBa Angle [Norm: 130°]: Measures the shape of the cranial base. This angle dictates how forward or backward the jaw joints sit relative to the face.
MP - SN Plane [Norm: 32°] & MP - Palatal Plane [Norm: 25°]: These intersecting angles determine whether the jaws are opening vertically (Hyperdivergent) or closing horizontally (Hypodivergent).
N:ANS / Total Facial Height [Norm: 45%]: Tracks the vertical proportion of the upper face compared to the lower face to ensure ideal aesthetic balance.

III. Soft Tissue & Holdaway Aesthetics

Nasolabial Angle [Norm: 102°]: The angle formed at the base of the nose and the upper lip. An acute angle indicates a protruding upper lip, while an obtuse angle shows a flat or receded profile.
H-Angle (Holdaway) [Norm: 10°]: Measures the profile's soft-tissue harmony by comparing the line from the chin to the upper lip against the bony facial plane. Higher values indicate prominent, protrusive lips.

💻 How to Run Segner / Hasund Analysis on Ceph.DentalOrb.com

Our secure, offline-first web tool processes these multi-step geometric calculations directly inside your browser:

Step 1: Upload and Select Module
Open ceph.dentalorb.com, upload your digital lateral cephalometric X-ray, and choose Segner / Hasund Analysis from the dropdown menu.

Step 2: Millimeter Calibration
Because this analysis relies heavily on linear millimeter values (like the Wits Appraisal), click 测量 Calibrate and trace your 10mm spatial reference line carefully.

Step 3: Map the Skeletal & Soft-Tissue Landmarks
Click Rx Analyze. Follow the visual prompts in the top black overlay box to click your structural points. This sequence includes cranial references (S, N, Ba), jaw limits (A, B, ANS, PNS, Go, Me, Pog), dental points, and crucial soft-tissue parameters (Nose tip, Subnasale, Lips, and Soft Chin).

Step 4: Generate Your Harmony Report
As soon as the final soft-tissue point is clicked, the tool instantly displays your comprehensive diagnostic report in the sidebar. Variations outside normal ranges are automatically highlighted in red to guide your treatment planning. Click Print to save or compile a clean PDF chart.

Help Keep Advanced Diagnostics Free: We are proud to provide this privacy-centric, web-based tracing engine completely free of charge to the global dental community. If this application helps your clinical or educational workflows, please support us by taking a brief moment to view the ads on our site. Your support covers our hosting and directly funds future AI automation updates!

In Part 6 of our guide, we will step into advanced treatment planning and surgical predictability with the classic **Ricketts Bioprogressive Analysis**! If you have any questions, let us know in the comments below.

Bjork-Jarabak Growth Analysis

July 01, 2026

Welcome back to our clinical cephalometric breakdown series at ceph.dentalorb.com. In our previous post, we explored the visual ranges of Downs Analysis. Today, we are shifting our focus to a method that is indispensable for structural growth forecasting, pediatric interception, and surgical planning: the Bjork-Jarabak Growth Analysis.

Developed through the pioneering implant research of Dr. Arne Bjork and later refined for clinical practice by Dr. Joseph Jarabak, this method looks at the face as a dynamic polygon. It provides clinicians with a mathematical blueprint to determine whether a patient is growing vertically or horizontally, and how the individual parts of the jaw adapt to that growth.

Part 4: What is Bjork-Jarabak Analysis?

The core of the Bjork-Jarabak method lies in its assessment of the Jarabak Polygon—a geometric shape formed by connecting five specific points on the skull and jaws: Sella (S), Nasion (N), Pogonion (Pog), Gonion (Go), and Articulare (Ar).

By studying the angles inside this polygon and comparing the height of the front of the face against the back of the face, the analysis accurately predicts the direction of mandibular rotation during growth. This makes it an incredibly powerful tool for predicting whether orthodontic treatments will face a favorable or challenging skeletal environment.

📐 The Key Parameters & Diagnostic Values

When you map your lateral cephalogram on Dental Orb, the system immediately calculates these definitive growth metrics:

I. The Bjork Sum (Cranial Base & Jaw Angles)

Dr. Bjork demonstrated that by adding three specific internal angles of the facial polygon together, you get a highly predictable indicator of growth direction. The classic formula is: Saddle Angle + Articular Angle + Gonial Angle.

The Clinical Norm Sum: 396° (±3°)
Interpretation:
- Increased Sum (Greater than 399°): Indicates a Clockwise (Vertical) growth pattern. The lower jaw tends to rotate backward and downward, which is associated with high-angle cases, weak chins, and open bite tendencies.
- Decreased Sum (Less than 393°): Indicates a Counter-Clockwise (Horizontal) growth pattern. The lower jaw rotates forward and upward, resulting in strong chin projection, deep bites, and low-angle skeletal characteristics.

II. Individual Polygon Angles

Saddle Angle (N-S-Ar) [Norm: 123°]: Evaluates the relationship of the anterior and posterior cranial base blocks. An increased angle often moves the TMJ posteriorly, pushing the lower jaw back.
Articular Angle (S-Ar-Go) [Norm: 143°]: Reflects the relationship between the skull base and the mandibular ramus.
Gonial Angle (Ar-Go-Gn) [Norm: 130°]: Measures the shape of the lower jaw itself. It is subdivided into an Upper Gonial Angle (indicates ramus inclination) and a Lower Gonial Angle (indicates body inclination). High values point to vertical growth patterns.

III. Facial Height Ratios (The Jarabak Quotient)

This is arguably the most famous part of the analysis. It compares the Posterior Facial Height (Sella to Gonion) against the Anterior Facial Height (Nasion to Menton).

Jarabak Quotient Formula: (PFH / AFH) x 100
Interpretation Ranges:
- 54% to 58%: Hyperdivergent Pattern. Extreme vertical growth with minimal forward jaw rotation. Mechanics must avoid opening the bite further.
- 59% to 63%: Neutral/Normal Pattern. Balanced vertical and horizontal skeletal growth.
- 64% to 80%+: Hypodivergent Pattern. Strong horizontal growth with powerful forward jaw rotation, common in deep-bite configurations.

💻 How to Run Bjork-Jarabak Analysis on Ceph.DentalOrb.com

Our interactive web platform allows you to map these critical growth paths smoothly:

Step 1: Upload and Module Setup
Open ceph.dentalorb.com on your desktop or mobile browser. Upload your digital lateral cephalogram, and choose Bjork-Jarabak Analysis from the dropdown selector.

Step 2: Linear Calibration
Click the 📏 Calibrate button. Draw your 10mm spatial reference path across your image's calibration grid to enable highly accurate millimeter output for facial heights.

Step 3: Point Mapping
Click Rx Analyze. Follow the visual text cues on the screen overlay to plot the required skeletal landmarks sequentially: S, N, Ar, Pog, Go, Gn, and Me.

Step 4: View Your Growth Forecast
As soon as Menton is clicked, the tool traces the Jarabak Polygon directly onto your X-ray image and outputs the full calculations in the sidebar. The system automatically highlights whether your patient falls into a clockwise, counter-clockwise, or neutral growth category. Click Print to generate a high-resolution PDF for your case documentation.

Help Us Maintain These Diagnostic Resources: We are dedicated to providing advanced, secure, and privacy-respecting dental applications without subscription models. If this tool streamlines your diagnostic or educational workflows, please support us by taking a brief moment to view the advertisements displayed on this page. Your engagement ensures this resource stays free and open for practitioners worldwide!

In Part 5 of our series, we will transition into comprehensive structural and soft-tissue harmony utilizing the balanced **Segner / Hasund Analysis**! If you have any clinical feedback, drop it in the comments below.

Down's Analysis

July 01, 2026

Welcome back to our comprehensive cephalometric series at ceph.dentalorb.com. In our previous posts, we broke down the classic systems of Steiner and Tweed. Today, we are exploring a highly objective system that introduced one of the most unique visual graphing methods in orthodontic history: Downs Analysis and its famous "Wiggle" diagram.

Developed by Dr. William B. Downs in 1948, this analysis was groundbreaking because it was derived entirely from living individuals with ideal, excellent occlusion. Instead of comparing a patient to an arbitrary single "norm," Downs created a range of normal values, allowing clinicians to visually track structural harmony at a glance.

Part 3: What is Downs Analysis & "The Wiggle"?

Downs Analysis separates the facial structure into two distinct components: 5 skeletal parameters to assess the bony profile, and 5 dental parameters to assess the tooth positions.

To make interpretation easier, Dr. Downs mapped these 10 parameters onto a physical chart. The average normal values run vertically down the exact center of the chart. If a patient's measurements deviate, they are plotted to the left or right of the center line. Connecting these plotted points creates a jagged line—the deviation pattern. If the resulting line stays relatively straight down the center, the face is in perfect harmony. If it "wiggles" excessively to the sides, it instantly highlights where the structural imbalance lies.

📐 The 10 Core Parameters & Clinical Ranges

When you map your digital cephalogram on Dental Orb, the software automatically computes these 10 key metrics:

I. Skeletal Parameters (Bony Profile)

1. Facial Angle (Norm: 87.8° / Range: 82° to 95°): Measured between the Frankfort Horizontal Plane and the Facial Plane (Nasion-Pogonion). It determines the degree of recession or protrusion of the chin.
Interpretation: A low angle indicates a retruded, Class II chin profile; a high angle indicates a prominent, Class III chin profile.
2. Angle of Convexity (Norm: 0° / Range: -8.5° to 10°): Measured at the intersection of the Nasion-Point A line and the Point A-Pogonion line.
Interpretation: A high positive value indicates a convex skeletal profile (Class II tendency), while a negative value indicates a concave profile (Class III tendency).
3. A-B Plane Angle (Norm: -4.6° / Range: -9° to 0°): Evaluates the relation of the anterior limits of the upper and lower jaw bases to each other, relative to the facial plane.
Interpretation: Increasingly negative values indicate a Class II jaw relationship.
4. FMA / Mandibular Plane Angle (Norm: 21.9° / Range: 17° to 28°): Measures the steepness of the lower jaw base relative to the Frankfort Horizontal Plane.
Interpretation: High values indicate vertical growth patterns; low values indicate horizontal, strong-jaw growth patterns.
5. Y-Axis / Growth Axis Angle (Norm: 59.4° / Range: 53° to 66°): Measured between the Frankfort Plane and the line from Sella to Gnathion.
Interpretation: An increased angle shows a downward/vertical growth direction of the face; a decreased angle shows forward/horizontal growth.

II. Dental Parameters (Tooth Positions)

6. Cant of Occlusal Plane (Norm: 9.3° / Range: 1.5° to 14°): Measures the steepness of the biting surface relative to the Frankfort Horizontal Plane.
7. Interincisal Angle / IOPA (Norm: 135.4° / Range: 130° to 150°): The angle formed between the long axes of the upper and lower central incisors.
Interpretation: A low angle indicates that both front teeth are tipped excessively forward (Bimaxillary Protrusion).
8. L1 to Occlusal Plane (Norm: 14.5° / Range: 3.5° to 20°): Measures the tilt of the lower incisor relative to the biting surface plane.
9. L1 to Mandibular Plane / IMPA (Norm: 91.4° / Range: 81.5° to 97°): Tracks the tilt of the lower front teeth relative to the lower border of the jaw.
10. U1 to L1 Protrusion / Distance (Norm: +2.7 mm / Range: -1 mm to 7 mm): Measures how far forward the upper incisor tip sits relative to the line connecting the lower incisor tip to the chin.

💻 How to Run Downs Analysis on Ceph.DentalOrb.com

Our offline-first, highly secure web tool makes mapping these complex parameters simple:

Step 1: Upload and Select Module
Go to ceph.dentalorb.com, upload your digital lateral cephalogram, and choose Downs Analysis from the dropdown selector.

Step 2: Calibrate
Click the 📏 Calibrate button and plot your 10mm guide points to ensure precise linear millimeter readings.

Step 3: Sequential Landmark Plotting
Click Rx Analyze. Follow the overlay box text at the top of the workspace to map the requested points: N, Pog, A, B, Or, Po, S, Gn, Go, Me, incisor tips/roots, and the first molar cusp contact point.

Step 4: Real-time Analysis Generation
As soon as the last point is clicked, the system processes the trigonometry locally and delivers a categorized, color-coded report. You can instantly view where your patient falls within Downs' normal ranges. Click Print to generate a clean PDF chart for clinical compilation.

Support Open-Access Dental Informatics: We believe powerful diagnostic tools should be universally accessible to dental students and practitioners. To help us maintain this web server and fund advanced modules without a subscription wall, please take a brief moment to view the advertisements displayed on this page. Your support ensures this resource stays online and free for all!

In Part 4 of our series, we will transition into structural growth forecasting using the comprehensive **Bjork-Jarabak Analysis**! Leave your feedback or questions in the comment section below.

A Complete Guide to Steiner’s Method on Dental Orb

July 01, 2026

Cephalometric radiography is one of our most powerful tools for diagnosing malocclusion, evaluating growth patterns, and planning orthodontic or surgical treatments. However, manually tracing hard-copy films with acetate paper and protractors is time-consuming and prone to human error.

To bridge this gap, we created the Free Online Cephalometric Analysis Tool at ceph.dentalorb.com. It is an offline-first, browser-based diagnostic assistant that allows you to instantly map structural landmarks and generate precise geometric reports.

In this multi-part series, we will break down each major analysis type available in our tool—starting with the gold standard: Steiner’s Analysis.

Part 1: What is Steiner’s Cephalometric Analysis?

Developed by Dr. Cecil C. Steiner in the 1950s, this analysis is arguably the most widely taught method in orthodontics. Instead of relying on highly variable individual anatomical structures, Steiner utilized the stable Sella-Nasion (SN) line as his primary cranial reference plane.

The core philosophy of Steiner's method is simple: establish the underlying skeletal foundation first, analyze how the teeth fit onto that foundation, and finally assess how the soft tissue lips harmonize with the face.

📐 The Core Measurements & Normal Values

Steiner’s analysis is divided into four main clinical categories. When you use the Dental Orb tool, your generated report will automatically compare your patient's values against these established clinical norms:

1. Skeletal Foundation (Anteroposterior Relation)

These angles determine whether the jaws are positioned correctly relative to the skull base.

SNA Angle (Norm: 82°): Evaluates the anteroposterior (AP) position of the maxilla.
Interpretation: Greater than 84° indicates Maxillary Prognathism (forward jaw); less than 80° indicates Maxillary Retrognathism (receded jaw).
SNB Angle (Norm: 80°): Evaluates the AP position of the mandible.
Interpretation: Greater than 82° indicates Mandibular Prognathism; less than 78° indicates Mandibular Retrognathism.
ANB Angle (Norm: 2°): Calculated as SNA minus SNB, this reveals the structural relationship between the upper and lower jaws.
Interpretation: Greater than 4° indicates a Skeletal Class II profile; less than 0° indicates a Skeletal Class III profile.

2. Skeletal Vertical Growth Pattern

SN-MP Angle (Norm: 32°): The angle between the Sella-Nasion plane and the Mandibular Plane (Gonion-Gnathion).
Interpretation: Greater than 36° represents a Hyperdivergent (High Angle) vertical growth pattern, often associated with long faces and open bites. Less than 28° represents a Hypodivergent (Low Angle) horizontal growth pattern, often seen in deep bites.

3. Dental Relations & Inclinations

These metrics track how much the front teeth have tipped or drifted to compensate for the underlying jaw structure.

U1 to NA (Angle: 22° / Linear: 4 mm): Measures the tip and forward protrusion of the upper central incisor relative to the line connecting Nasion to Point A.
L1 to NB (Angle: 25° / Linear: 4 mm): Measures the tip and protrusion of the lower central incisor relative to the Nasion-Point B line.
Occlusal Plane to SN (Norm: 14°): Evaluates the steepness of the biting surface relative to the cranial base.

4. Aesthetic & Soft Tissue Harmony

L1 to A-Pog (Norm: 1 mm): Measures the lower incisor tip to the structural line running from Point A to Pogonion. This is critical for predicting post-treatment dental stability.
Upper & Lower Lip to S-Line (Norm: 0 mm): Steiner’s aesthetic line draws a tangent from the tip of the nose (Pronasale) to the soft-tissue chin (Soft Pogonion). Ideally, both lips should neatly touch this plane for optimal facial balance.

💻 Step-by-Step: How to Run Steiner’s Analysis on Ceph.DentalOrb.com

Our tool handles all calculations locally in your web browser, ensuring complete patient data privacy. Follow these steps to generate a full report in under two minutes:

Step 1: Upload the Lateral Cephalogram
Navigate to ceph.dentalorb.com and click the Choose File / Upload button on the toolbar. Select your patient's digital lateral cephalometric X-ray.

Step 2: Select your Analysis Module
Use the dropdown selection menu in the toolbar and select Steiner's Analysis. The sidebar will automatically update to prepare for the specific landmarks required.

Step 3: Calibrate the Scale
Click the 📏 Calibrate button. Find the millimeter ruler visible on your X-ray image or positioner template. Click the starting point, then click the 10mm mark. This trains the system's pixels-to-millimeter ratio for perfect linear accuracy.

Step 4: Plot the Anatomical Landmarks
Click Rx Analyze. Look at the top black instruction overlay—it will tell you exactly which landmark to click next (e.g., "Tap: Sella (S)"). Follow the sequential prompts to accurately place your structural points (S, N, A, B, Pog, Gn, Go, incisor tips, and soft tissue contours).

Step 5: Review and Print the Diagnostic Report
The moment your last soft-tissue landmark is placed, the tool will instantly exit analysis mode and display a neatly categorized structural report in your sidebar. Deviations from normal values are color-coded (Green for normal range, Red for critical skeletal/dental discrepancy). Click Print to generate a clean, printer-friendly PDF file to append to your patient's physical chart.

Support Free Dental Software: To help us cover our high-performance web hosting, server maintenance, and future AI automation updates, we keep this tool completely free of charge. If you find this software helpful in your daily diagnostic workflows, please take a brief moment to view the ads displayed on our site. Your active support directly ensures that these diagnostic resources remain open and accessible to dental practitioners and students worldwide!

Stay tuned for Part 2 of our guide, where we will dive deep into analyzing facial patterns using Tweed's Diagnostic Triangle!