Mandibular Motion Modeling Using Anatomical Parameters
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Solution Overview
Problem
Current orthodontic treatment planning methods face challenges in efficiently and safely aligning the mandible with the maxilla while minimizing discomfort and preventing tooth damage, as they often rely on inaccurate modeling of mandibular motion, leading to potential collisions and prolonged treatment durations.
Innovation Solution
A method using a point cloud representation of the mandible and maxillary arch to translate cartesian translations and rotations into natural movements, determining parameters like maximum protrusion displacement, Bennett angle, and Sagittal inclination path, to create a more accurate and anatomically natural mandible model, aiding in safer and more efficient orthodontic treatment planning and appliance design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional cartesian translation and rotation methods are used to model mandibular motion, then the modeling process is simple, but the accuracy of mandibular motion representation deteriorates, leading to potential collisions and extended treatment duration
Solution Approach 1:
The patent transforms the motion modeling from traditional cartesian parameters (simple translation and rotation) to anatomically-based parameters including Bennett angle, Sagittal inclination path angle, and maximum protrusion displacement. This parameter transformation enables more accurate representation of natural mandibular motion while maintaining computational feasibility through defined calculation methods for each parameter.
2Productivity
If the number of intermediate treatment steps is reduced to improve efficiency, then the overall treatment duration is minimized, but the risk of tooth damage and collisions increases
Solution Approach 1:
The patent performs preliminary analysis of natural mandibular motion paths and characteristics before finalizing the treatment plan. By calculating anatomically-correct motion parameters and simulating mandibular movement along natural paths, the system identifies potential collision risks in advance, allowing treatment steps to be optimized for both speed and safety without compromising tooth protection.
3Ease of operation
If purely cartesian movements are applied to the mandible model, then the computational process is straightforward, but the anatomical naturalness of the movement deteriorates
Solution Approach 1:
The patent replaces the simple mechanical cartesian translation and rotation system with an anatomically-based motion system that incorporates Bennett movement, Sagittal inclination, and protrusion paths. Although computationally more complex, the system maintains ease of operation by providing automated calculation methods and clear procedural steps for determining each anatomical parameter, making the transition from cartesian to anatomical modeling manageable.
Data Source
AI summary
A method for modeling mandibular motion, executable by an electronic device and including: acquiring a point cloud representing a mandible; determining an initial condyle pose; determining natural movement parameters for the condyles including maximum protrusion displacement, a Bennett angle, and a Sagittal inclination path angle; receiving an indication of a translation and/or a rotation of the mandible; determining a first natural movement of translation including a protrusion followed by a first sagittal inclination; determining a second natural movement of rotation including a Bennet movement followed by a second sagittal inclination; applying the natural movement s to the point cloud to form a transformed point cloud; creating a model of the mandible having undergone the at least one of the translation and the rotation using the transformed point cloud; and displaying the model of the mandible having undergone the translation and/or rotation.