Optical Jaw Tracking for Accurate TMJ Analysis
Solution Overview
Problem
Current methods in restorative dentistry lack accurate measurement and analysis of temporomandibular joint and occlusal relationships, relying on intuitive techniques and mechanical articulators that cannot accurately mimic jaw movements, leading to time-consuming and imperfect treatment planning.
Innovation Solution
A motion analysis system using three-dimensional optical target tracking to measure absolute changes and relative functions of dental anatomical structures, combining low-frequency data with high-frequency data and computer models to create a mathematical representation of cranio-mandibular relationships, enabling precise measurement and reporting of jaw movements and forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical articulators are used to simulate jaw movements, then treatment planning can be performed, but the articulators cannot accurately mimic the certain movements of the patient's jaws
Solution Approach 1:
The patent uses optical targets attached to the patient's jaw to create a digital copy of their specific jaw movements. Cameras track these targets to capture the actual movement patterns, which are then used to program the articulator to accurately replicate the patient's unique jaw mechanics, replacing the need for mechanical articulators to physically mimic the movements.
Solution Approach 2:
The patent replaces the mechanical articulator system with an optical tracking and computer-based simulation system. Instead of using mechanical components to physically replicate jaw movements, the system uses optical targets, cameras, and software to capture and analyze movements, then translates this data into treatment planning information, achieving higher accuracy without mechanical limitations.
2Measurement precision
If physical registrations and mechanical articulation are used to analyze occlusion, then occlusal relationships can be assessed, but the process is time consuming and must be carefully executed
Solution Approach 1:
The patent replaces time-consuming mechanical articulation processes with optical tracking and computer-based analysis. Optical targets attached to the jaw are tracked by cameras to automatically capture movement data, which is then processed by software to assess occlusal relationships, eliminating the manual, time-intensive steps of physical registration and mechanical articulation while maintaining or improving measurement precision.
Solution Approach 2:
The patent changes the measurement parameters from static physical registrations to dynamic optical tracking data. By capturing real-time positional information of optical targets during jaw movement, the system obtains comprehensive movement parameters automatically, reducing the time required for careful execution of traditional articulation procedures while improving the precision of occlusal relationship assessment.
3Loss of information
If traditional measurement methods are used for maxillo-mandibular relationships, then basic occlusal information can be obtained, but routine analysis of the temporomandibular joints is not enabled
Solution Approach 1:
The patent creates a multi-functional measurement system where optical targets and cameras serve multiple purposes: tracking jaw position, analyzing temporomandibular joint movements, assessing occlusal relationships, and evaluating treatment outcomes. This single system provides comprehensive TMJ analysis capabilities that traditional methods cannot achieve, obtaining complete information without proportionally increasing device complexity.
Solution Approach 2:
The patent uses optical targets attached to the jaw to create a digital representation of temporomandibular joint movements. These targets capture the complete range of joint motions, which are then tracked and analyzed by the computer system to provide routine TMJ analysis capability, enabling comprehensive joint assessment without requiring complex specialized equipment for each measurement type.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system provides a detailed, accurate analysis of cranio-mandibular functions, allowing for improved treatment planning and communication between dental laboratories and clinicians, reducing the time and cost associated with traditional methods while offering a comprehensive understanding of jaw mechanics and occlusal relationships.
Implementation Method 1
measuring the absolute changes and relative function of one anatomical structure to another based on three dimensional optical target tracking
Data Source
AI summary
The present invention provides a motion analysis system for measuring the relative function of one anatomical structure to another based on optical fiducial markers tracked in a series of images and in turn data, where the components of hard and soft tissue are used in analysis and where the image data can be compared in a time series such that probabilities of involvement with various tissues can be correlated to the image data.The system measures displacement at various positions and can relate the data to various muscle and other soft tissue variations within the constraints of the anatomy and physiology including motion in three dimensional space, including rotations and translations and functions including velocity and acceleration.