CBCT-Based Clear Aligner Treatment Planning

CBCT-Based Clear Aligner Treatment Planning

CBCT-based clear aligner treatment planning means staging tooth movement using a three-dimensional volumetric scan — rather than a surface IOS scan alone — so that root positions, alveolar bone boundaries, and true occlusal relationships inform every prescribed step. The result is a treatment plan built around the whole tooth, not just its visible crown. For clinicians prescribing clear aligners, integrating CBCT with intraoral scanning is the clearest path from diagnostic accuracy to predictable outcomes.

Why Crown-Only Planning Falls Short

An intraoral scan (IOS) captures crown morphology with excellent fidelity. What it cannot show is what lies beneath the gingival margin: root angulation, root length, proximity to adjacent roots, cortical plate thickness, or the precise alveolar envelope available for movement.

When a treatment plan is staged on crown data alone, several risks emerge:

• Root torque errors — A crown may appear well-aligned while its root sits outside the alveolar housing, risking dehiscence or fenestration.
• Uncontrolled tipping — Without root-position feedback, bodily movement and controlled tipping are estimated rather than verified.
• Interradicular spacing assumptions — Premolar extraction cases or significant arch development moves require accurate knowledge of root divergence, which IOS does not provide.

None of these limitations are unique to clear aligners; they apply to any tooth-moving appliance. The difference is that clear aligner software, historically, was built on crown data because that was what labs received. CBCT integration changes that baseline assumption.

What CBCT Adds to the Aligner Workflow

CBCT (Cone Beam Computed Tomography) is a volumetric imaging modality that generates a three-dimensional dataset of hard and soft tissue structures at relatively low radiation doses compared to medical CT. In the context of aligner planning, its key contributions are:

• Root visualisation at every planned step — Superimposing the CBCT volume onto the IOS surface model allows the staging software to track root apex position, not just cusp tip, through each prescribed movement increment.
• Bone quantity mapping — Cortical plate thickness and cancellous bone depth define the safe biological envelope for expansion, proclination, and intrusion. Plans that respect this envelope are less likely to produce unwanted tissue responses.
• Accurate torque prescription — True root angulation data means the clinician can confirm — or correct — the torque values the AI has staged before a single aligner is manufactured.
• Airway and skeletal context — CBCT provides lateral cephalometric equivalents and airway volume data, relevant for adult patients with skeletal discrepancies where clear aligners are part of a combined orthodontic-restorative or surgical plan.

How Klaer Integrates CBCT Into AI-Staged Treatment Plans

Klaer, manufactured in the UAE and part of the aiHealth Group / Kyour ecosystem (Powered by kyour.ai), requires both an IOS and a CBCT upload at case submission. This is not optional documentation — it is the diagnostic input that drives the planning engine.

The workflow runs as follows:

1. Clinician uploads IOS + CBCT via the Klaer case portal.
2. AI staging fuses the volumetric and surface datasets, generating a full 3D treatment simulation that tracks root movement, crown movement, and torque at every stage.
3. Orthodontist verification — every plan is reviewed and approved by a Klaer orthodontist before manufacturing is authorised. The clinician prescribing the case retains full approval authority.
4. UAE manufacture and clinic dispatch — aligners are produced locally and shipped to the prescribing clinic.
5. Weekly at-home phone imaging — patients submit weekly images through the monitoring app, allowing the treating clinician to track tooth movement against the planned trajectory between in-office visits.

The CBCT requirement means that when an AI-staged plan shows, for example, 3 mm of upper incisor proclination, the orthodontist verifying that plan can confirm the cortical plate has sufficient depth to accommodate it — not infer it from an average-population estimate.

Clinical Scenarios Where CBCT Changes the Plan

Skeletal Class II with dentoalveolar compensation — Incisor proclination in a Class II case may look acceptable on a crown-only setup. CBCT frequently reveals that the labial cortical plate is already thin, prompting the verifying orthodontist to reduce the planned proclination increment and reconsider the mechanics.

Adult expansion cases — Slow dental expansion in adults is biologically possible within narrow limits. CBCT quantifies buccal bone volume over posterior roots, giving the clinician a defensible basis for the expansion prescription rather than a rule-of-thumb maximum.

Impacted or ectopic canines — When a canine is partially erupted or displaced, CBCT shows its root tip location relative to adjacent lateral incisor roots. Crown-only staging would plan to "make space"; CBCT-informed staging plans the specific 3D vector required.

Post-restorative or implant cases — Endodontically treated teeth with altered root morphology, or ridges adjacent to implants, benefit from CBCT context that IOS simply cannot provide.

Frequently Asked Questions

Do I need a CBCT for every clear aligner case with Klaer? Yes. Klaer's case submission protocol requires both an IOS and a CBCT scan. This dual-input requirement is what enables the AI to stage true 3D tooth movement — tracking roots, not just crowns — and what allows the verifying orthodontist to approve a plan with full volumetric context.

What CBCT field of view (FOV) is recommended for aligner planning? A mid-FOV capturing the full dental arches and alveolar bone (typically 8 × 8 cm to 10 × 10 cm, depending on the unit) is generally sufficient for orthodontic aligner planning. Cases with suspected skeletal involvement or airway relevance may warrant a larger FOV; the Klaer clinical team can advise on scan parameters at case setup.

How does CBCT-informed planning affect treatment time? CBCT data allows the verifying orthodontist to set biomechanically realistic stage increments from the outset, which can reduce mid-course corrections and refinement rounds — though individual clinical variables always influence overall treatment duration.

Can I submit a case if my practice does not have a CBCT unit? Many referral centres, radiology practices, and hospital dental departments in the UAE and across the region offer CBCT imaging on referral. Klaer's team can support you in establishing a referral pathway so that CBCT access does not become a barrier to case submission.

If you are ready to submit your first CBCT + IOS case, the Klaer clinical team at klaer.ae is available to walk you through the upload workflow and scan specifications. Clinicians interested in understanding how AI-staged 3D planning works in practice are welcome to request a case demonstration.