Condyle Displacement Measurement Using Electronic Models
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Solution Overview
Problem
Current methods for measuring condyle displacement during jaw articulation are prone to user error, lacking accuracy in determining the magnitude and direction of condyle shift, which is crucial for tailored dental treatment plans.
Innovation Solution
A method and system that generate a transformation matrix from positional data sets representing the mandible and maxilla in different bite positions, allowing for precise measurement of condyle displacement by interpolating intermediate positions and displaying transformed condyle positions on electronic models within a common coordinate system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If tactile observation or face bow methods are used to measure condyle displacement, then the measurement process is simple and quick, but the accuracy and precision of the measurement results deteriorate due to user error
Solution Approach 1:
The patent creates electronic models (digital copies) of physical dental impressions containing mandible and maxilla. These electronic models allow for precise digital measurement of condyle displacement without the errors inherent in manual tactile observation or face bow methods. The copying principle transforms physical measurements into digital representations that can be analyzed with higher precision.
Solution Approach 2:
The patent replaces manual mechanical measurement methods (tactile observation, face bow) with computer-aided electronic modeling and transformation matrix calculations. This substitution eliminates user error in judgment while maintaining measurement capability, achieving higher precision through digital rather than mechanical means.
2Measurement precision
If electronic models with common coordinate system are used, then the measurement accuracy improves, but the device complexity and processing requirements increase
Solution Approach 1:
The patent establishes a common coordinate system that serves multiple functions: it enables transformation between different bite position models, provides a reference framework for measuring condyle displacement, and allows integration of mandible and maxilla models. This universal coordinate system resolves the complexity by providing a single integrated framework rather than separate measurement systems.
Solution Approach 2:
The patent transforms positional data from different coordinate systems into a common coordinate system using transformation matrices. This parameter transformation allows accurate comparison of condyle positions across different bite positions while managing system complexity through mathematical coordination rather than physical complexity.
3Loss of information
If transformation matrices are generated from multiple bite positions, then the detail and accuracy of condyle displacement analysis improves, but the time and data processing requirements increase
Solution Approach 1:
The patent performs preliminary actions by capturing multiple bite position data sets and generating transformation matrices in advance. This preliminary data collection and processing allows for detailed condyle displacement analysis without requiring time-consuming measurements during the actual treatment planning discussion, reducing time loss in critical decision-making phases.
Data Source
AI summary
A system and method for determining condyle displacement during jaw articulation includes a physical model with corresponding reference points. The physical model is positioned and scanned to obtain positional data representing a first and second bite position. This positional data is used to generate a transformation matrix. The position of at least one condyle is determined in reference to positional data scanned from the physical model. The transformation matrix is used to map the position of the condyle with respect to the second bite position.