Dental CBCT

What it does

Dental CBCT reads the cone-beam CT volumes taken for implants, impacted teeth, endodontic problems, orthodontics, airway and temporomandibular joint questions. Upload the CBCT series; the run segments the anatomy of the whole field of view and returns it both as DICOM segmentations and as STL meshes that planning software can open.

The segmentation covers every tooth with its FDI number and pulp, the maxilla and mandible, both inferior alveolar canals, the maxillary sinuses, the pharynx and any crowns, bridges or implants, giving a 3D odontogram. On top of it the run measures the relation of impacted teeth to the nerve canal and the volume and narrowest point of the pharyngeal airway. The lesion and TMJ sections report periapical lesions, cysts, sinus disease and degenerative condylar signs across the field of view.

Intended use

Decision support for the dentist or surgeon who often reviews the CBCT alone: canal proximity before a third-molar extraction, and airway measurements that can support a referral for a sleep study. The result states which regions the field of view covers and which sections were assessed in each.

Who it is for

Oral and maxillofacial surgeons, implantologists, endodontists, orthodontists, general dentists who order CBCT and dentomaxillofacial radiologists. Developers import the meshes and measurements into implant-planning, surgical-guide or orthodontic software.

Accepted input

• CBCT series as CT Image Storage or Enhanced CT, uploaded as a zipped study, via DICOMweb or from a pre-signed URL.
• Typical dental volumes of 200 to 700 slices with isotropic voxels of 0.1 to 0.4 mm, from small to large fields of view.

Requirements

Requirement	Why
Voxel spacing and orientation	Distances to the canal, sinus floor and airway are reported in millimetres
Field of view covering the region in question	Structures outside a small field of view are marked as not assessed
Both condyles in the volume	Needed for the TMJ section
Pharynx in the volume	Needed for the airway section

CBCT grey values are not reliable Hounsfield units, so density-based values are labelled as relative. Metal streaks from crowns and implants and patient motion are reported as quality flags on the structures they affect.

Optional context

The reason for the scan (implant site, third-molar extraction, endodontic problem, orthodontic or airway assessment, TMJ symptoms) goes in clinical_context and orders the guidance; snoring or sleep symptoms put the airway result in context.

The result

A JSON result with the 3D odontogram and one section per question, plus DICOM SEG and STL exports.

Section	Content
Anatomy segmentation	Teeth with FDI numbers and pulps, maxilla, mandible, inferior alveolar canals, maxillary sinuses, pharynx, crowns, bridges and implants
Impacted teeth	Position, root morphology, contact or distance to the inferior alveolar canal, cortical thinning, Winter and Pell & Gregory class
Pharyngeal airway	Airway segmentation, volume, minimal cross-sectional area and the level where it occurs
Lesions and incidental findings	Periapical lesions with CBCT-PAI, cysts and tumours, sinus disease and other incidental findings; the result states explicitly whether the lesion screen was performed
Temporomandibular joint	Condylar morphology and degenerative signs: erosion, osteophyte, flattening, sclerosis
Draft report	Opt-in (options.report): an English narrative that interprets the result for the reader (findings, impression, limitations); every number is checked against the findings

Standards

• DICOM: Segmentation and Label Map Segmentation for structures, SR TID 1500 for canal, sinus and airway distances, key images, Encapsulated PDF; STL meshes of every segmented structure.
• Tooth numbering: FDI two-digit notation (ISO 3950), DICOM CID 4018/4019 tooth codes.
• Findings: Winter and Pell & Gregory classifications for impacted teeth; CBCT-PAI for periapical lesions; DC/TMD imaging criteria for degenerative joint disease.

Related tools

• dental/cbct/implant-planning: choose an implant site by FDI position and get bone height and width, distances to the canal, sinus floor and adjacent roots, cortical thickness and suggested implant dimensions, with Misch density classes labelled as relative.