CBCT versus intraoral scans: what each contributes to a dental 3D model
A CBCT scan and an intraoral scan are not equivalent files. CBCT provides X-ray-derived volumetric information; an optical intraoral scan records visible surfaces. Placing the two together requires an alignment step, not simply opening both files in the same scene. S05 S06
For a dentist requesting a 3D demonstration, the difference helps define what should be shown and where each part should come from. It also prevents asking one source to supply information it does not contain.
Two sources answer different questions
In a CBCT-based explanation, the question may concern how a structure is represented within the volume. In an intraoral-scan demonstration, it may concern the recorded surface.
Describe the purpose before choosing an output format. Showing an arch, explaining a spatial relationship, and comparing two representations are not identical requests. Each calls for a different selection of views and a clear account of the example's limits.
When sources are combined, the accompanying description should identify the source of each object. Otherwise, viewers may attribute an optical surface to CBCT or interpret a presentation change as information directly observed in the scan.
What registration or alignment means
Registration places datasets in a common spatial reference. Research has specifically evaluated the integration of intraoral scans with CBCT, separately from the basic ability to display both datasets. S06 S07
The practical consequence is straightforward: objects that look aligned from one angle may need examination from other views. A demonstration should distinguish between sources shown separately, aligned objects, and a combined surface.
Do not use “fusion” as a synonym for precision. It describes an operation or a representation, not a validation result by itself.
Why a combined scene is not automatically a digital twin
At ASTHECA, we favor terms that can be explained and documented. A scene containing several sources can be described as a multimodal representation without calling it a clinically validated digital twin.
Before using a broader label, the reader would need to understand which sources exist, how they relate, what can be updated, and which uses are supported. Without that documentation, “3D model” or “anatomical representation” is a more precise description.
This approach makes it possible to demonstrate the technology without implying simulation, prediction, or clinical validation.
What to request in a multisource demonstration
We recommend three presentation states: the CBCT-derived representation on its own, the intraoral surface on its own, and the combined view. Each state should identify its source.
Keep the visual reference stable. If orientation, scale, and color all change at once, the audience may struggle to identify what is being compared. Changing one presentation variable at a time is a design recommendation, not a claim of experimentally proven educational benefit.
A CBCT-only request does not need to promise intraoral-scan integration. If an integration is not part of ASTHECA's available scope, the educational discussion must remain distinct from the commercial offer.
Before sharing files
Identify which sources you have and what you want to show. The initial coordination does not require patient names, diagnoses, or attachments. The team should specify the appropriate private transfer channel and confirm which materials are accepted.
ASTHECA's existing DICOM ZIP preparation guide addresses file organization. Do not assume that a PDF or a screenshot replaces the source files required for volumetric processing.
A new radiographic exposure should not be requested just to create a marketing visual. The FDA recommends CBCT examinations when they are necessary to provide clinical information that cannot adequately be obtained through other imaging approaches. S05
Frequently asked questions
Does an STL file tell me whether it came from CBCT or an intraoral scan?
The extension alone does not document an object's origin. Ask for its source and relevant transformations to be identified. Provenance belongs in the information accompanying a representation.
Does combining the files always improve the result?
That possibility should not become a universal guarantee. Registration has its own methods and evaluation conditions, as research on integrating these sources demonstrates. S06
Is intraoral-scan alignment included in every ASTHECA request?
This article explains the technology; it does not announce that feature as part of every service. Confirm the available scope before sending files or making payment.
Specify the representation you need
Continue with what to include in a dental DICOM-to-STL request and how to review segmentation quality.
For a demonstration-only 3D representation, contact ASTHECA. The service addresses the U.S. and Mexican markets. Current outputs are not for diagnosis, treatment planning, or guiding procedures.
Sources and references
- S05. Dental Cone-beam Computed Tomography — U.S. Food and Drug Administration.
- S06. Fusion of intra-oral scans in cone-beam computed tomography scans — Baan et al., 2020 / PubMed Central.
- S07. Novel Procedure for Automatic Registration between Cone-Beam Computed Tomography and Intraoral Scan Data — Kim et al., 2023 / PubMed Central.