AI-Staged Aligners: Planning True Root Movement
AI-staged clear-aligner treatment — as practised in the Klaer system — uses combined CBCT and intraoral scan (IOS) data to plan tooth movement in three dimensions, incorporating root position and angulation, not surface contour alone. This means the staging algorithm works from the full tooth unit — crown *and* root — before a single aligner is fabricated. Every treatment plan is then reviewed and verified by an orthodontist, so the clinical decision layer remains human.
Why Crown Position Alone Is Not Enough
A patient's smile can look well-aligned while the underlying root positions tell a different story. When treatment is staged using surface-scan data only — that is, the crown geometry captured by an IOS — the software has no information about where roots sit within the alveolar envelope, how much bone supports each tooth, or whether a proposed movement will drive a root toward a cortical plate.
The consequences are well recognised in orthodontic literature: unexpected root resorption, fenestrations, inadequate inter-radicular space for bodily movement, and relapse driven by unresolved root torque. Planning from crowns alone is, in effect, planning with half the information.
This is why Klaer's clinical approach begins with the full data set: IOS for crown morphology and occlusal contacts, CBCT for root anatomy, bone volume, and alveolar housing. Neither dataset substitutes for the other.
How CBCT + IOS Data Changes the Planning Equation
CBCT (cone beam computed tomography) gives the orthodontist a volumetric view of each tooth — root length, root form, root proximity to adjacent teeth, and the cortical and cancellous bone boundaries that define safe movement limits.
When this volumetric dataset is co-registered with the IOS mesh, the planning environment becomes genuinely three-dimensional. Each proposed tooth position can be evaluated not just for where the cusp tip will land, but for whether the root apex remains within sound bone, whether the root trunk will clear adjacent roots during rotation, and whether the planned torque expression is anatomically achievable.
At Klaer, clinicians upload both datasets through the platform. The AI staging engine — part of the kyour.ai ecosystem — processes the co-registered data and generates a treatment sequence that accounts for root position at every stage. The result is a staging proposal built on anatomy, not approximation.
What AI Staging Actually Does — and What the Orthodontist Controls
AI staging is the automated process of dividing a total tooth-movement prescription into an ordered sequence of incremental aligner steps, optimising the rate and direction of movement within biomechanical constraints.
In the Klaer workflow, the AI does not make the final clinical call — it makes a well-informed proposal. Specifically, the system:
- Calculates the 3D displacement vector for each tooth from start to target
- Sequences movements to respect inter-tooth dependencies (e.g., space creation before bodily movement)
- Flags movements that approach defined root-proximity or bone-boundary thresholds
- Generates staging that distributes forces across the arch in a biomechanically rational order
The orthodontist then reviews, modifies, and approves the plan before manufacturing begins. This verification step is non-negotiable in Klaer's protocol. The clinician's authority over staging, attachments, and sequencing is preserved throughout — the AI accelerates planning, it does not replace clinical judgement.
Clinical Implications: Torque, Angulation, and Alveolar Limits
Three movement types deserve particular attention when planning with root data.
Torque (Root Labial / Lingual)
Torque — defined here as rotation of the tooth around its buccolingual axis, producing root movement — is one of the most difficult movements for any aligner system to express predictably. The CBCT layer in Klaer's planning environment allows the orthodontist to see the starting root inclination in true 3D and set a target that keeps the apex within the alveolar envelope. Over-prescription of torque without this information risks root fenestration at the labial cortex.
Angulation (Tip)
Mesiodistal root angulation affects inter-radicular spacing and is critical when planning implant sites or managing extraction cases. Crown-based staging can improve the contact point relationship while leaving roots converging — a problem CBCT co-registration makes visible before treatment starts.
Alveolar Limits
Every tooth has a biologically defined boundary for safe movement: the alveolar housing. CBCT delineates this boundary precisely. Staging that respects these limits reduces the risk of adverse tissue response and supports long-term periodontal health — a consideration that becomes especially significant in adult patients with any existing bone loss.
Incorporating this anatomical intelligence into the staging process is what separates a root-movement-aware plan from a crown-movement-only sequence. It is the clinical rationale behind Klaer's requirement for CBCT alongside IOS at case submission.
Frequently Asked Questions
Do I need to submit CBCT for every Klaer case? CBCT is required as part of the Klaer case submission because root position data is integral to AI staging — not an optional add-on. Without volumetric data, the planning engine cannot account for root angulation, alveolar limits, or root proximity, which are central to how Klaer plans treatment.
Can I adjust the AI-generated staging before approving the plan? Yes. The orthodontist review step is built into the Klaer workflow. You can modify tooth movement targets, attachment prescriptions, and staging sequences before sign-off. Manufacturing does not begin until the treating clinician approves the final plan.
How does weekly phone imaging fit into root-movement monitoring? Weekly at-home imaging captures crown position and aligner seating in real time, feeding data back to the clinician between appointments. While phone imaging monitors surface fit rather than root position directly, early detection of tracking issues — especially with torque-heavy movements — allows timely clinical intervention before root position diverges from the plan.
Is Klaer's AI staging validated by an orthodontist for every case? Yes. Every treatment plan generated by the Klaer system is reviewed and verified by an orthodontist before it proceeds to manufacturing. AI staging accelerates the planning process and brings anatomical precision; orthodontist verification ensures clinical appropriateness for the individual patient.
Klaer is manufactured in the UAE and available to orthodontists and dentists practising worldwide. If you would like to understand how the CBCT + IOS workflow integrates with your current clinical protocols, the Klaer clinical team welcomes a case discussion — reach out through klaer.ae.