Orthodontic Trajectory Planning With Induced Stress Counterforces
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Solution Overview
Problem
Existing orthodontic treatment planning methods fail to efficiently and safely determine tooth trajectories, often leading to unintended movement or damage to surrounding teeth and tissues due to inadequate consideration of induced stresses and counterforces.
Innovation Solution
A method and system that utilize 3D digital models to determine validated tooth trajectories by applying forces within predetermined stress thresholds, accounting for induced stresses in adjacent teeth and applying counterforces to minimize unwanted movement, thereby optimizing the orthodontic treatment process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high forces are applied to move teeth quickly, then treatment duration is reduced, but stress thresholds are exceeded causing damage to surrounding teeth and tissues
Solution Approach 1:
The system dynamically adjusts force parameters throughout the treatment process based on real-time monitoring of tooth movement and stress levels. Forces are modified within predetermined stress thresholds to prevent damage while maintaining treatment efficiency, directly resolving the contradiction between applying sufficient force for quick results and avoiding excessive force that causes harm.
Solution Approach 2:
The system continuously monitors tooth movement and stress indicators, using this feedback to adjust subsequent force applications. This closed-loop control ensures forces remain within safe thresholds while achieving treatment goals efficiently, preventing the harmful effects of unmonitored high-force applications.
2Ease of operation
If forces are applied to move a given tooth, then the given tooth moves towards target position, but unintended movement occurs in adjacent teeth
Solution Approach 1:
The system applies counterforces to adjacent teeth that are experiencing unintended movement. These counterforces offset the induced stresses from the primary tooth movement, preventing unwanted trajectory deviations and maintaining precision in the overall treatment plan.
Solution Approach 2:
The system applies different forces to different teeth based on their individual treatment needs and the local stress conditions. Each tooth receives a customized force profile that accounts for its specific position, movement requirements, and the impact on surrounding structures, enabling precise control of individual tooth trajectories.
3Reliability
If multiple treatment segments are used to ensure safety, then stress thresholds are maintained, but treatment duration increases
Solution Approach 1:
The system dynamically determines the number and duration of treatment segments based on real-time monitoring of tooth movement and stress levels. Rather than using fixed, conservative segment divisions, the system adapts the treatment schedule to actual progress, maintaining safety thresholds while minimizing unnecessary treatment time.
Solution Approach 2:
The system pre-establishes force parameters and stress thresholds before treatment begins, allowing for optimized treatment segment planning. This preliminary configuration enables the system to proceed with confidence through predetermined safe force levels, reducing the need for excessive caution and extended treatment periods.
Data Source
AI summary
Methods and systems for determining orthodontic treatment based on 3D digital model of subject's teeth. The method includes determining, for a given trajectory segment of the orthodontic treatment of a given tooth in which the given tooth is moved from a start position to an end position, whether the force required to move the given tooth from the start position to the end position causes an induced stress associated with at least one other of the plurality of subject's teeth. In response to the induced stress being outside of a predetermined threshold level, determining a counter force to be applied to the at least one other of the plurality of subject's teeth. The orthodontic treatment can be thus determined as including the force to be applied to the given tooth and the determined counter force to be applied to the at least one other of the plurality if subject's teeth.