Automated Orthodontic Reference Object Construction
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Solution Overview
Problem
Conventional orthodontic bracket placement methods face challenges in accessing optimal surfaces, especially on severely crowded teeth or those obstructed by opposing arch teeth, leading to difficulties in accurate positioning due to visibility issues and moisture contamination, which increases the likelihood of incorrect placement.
Innovation Solution
A computer-implemented system and method for automatically constructing orthodontic reference objects such as the occlusal plane, arch form, and local occlusal plane using three-dimensional data, involving steps like determining initial directions, calculating planes, and transforming facial axis points into a coordinate frame to construct Bezier spline curves for precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual bracket placement is used, then the orthodontist can adjust brackets in real-time, but the placement accuracy decreases due to visibility issues and moisture contamination
Solution Approach 1:
The system performs preliminary digital planning and fabrication of brackets with pre-determined optimal positions. The brackets are customized and positioned in advance based on 3D scans and treatment goals, eliminating the need for manual placement during the appointment while ensuring high precision through digital measurement and automated positioning mechanisms.
2Measurement precision
If the bonding procedure is extended to minimize moisture contamination, then placement accuracy improves, but the treatment time increases
Solution Approach 1:
The system performs preliminary digital planning and fabrication of brackets with pre-determined optimal positions. The brackets are customized and positioned in advance based on 3D scans and treatment goals, eliminating the need for manual placement during the appointment while ensuring high precision through digital measurement and automated positioning mechanisms.
Solution Approach 2:
The invention replaces the manual mechanical placement process with an automated system that uses digital imaging, computer-aided design, and robotic or automated positioning mechanisms. This substitution eliminates the time-consuming manual adjustment process while maintaining or improving placement accuracy through precision engineering and digital control.
3Measurement precision
If automated bracket placement is implemented, then placement accuracy improves, but the system complexity increases
Solution Approach 1:
The system introduces a computer software intermediary that acts as a mediator between the digital scan data and the physical bracket placement. The software performs automated measurement, planning, and generation of placement instructions, simplifying the interface between complex imaging systems and execution mechanisms while ensuring high precision through algorithmic calculation and digital modeling.
4Measurement precision
If conventional reference object construction is used, then the process is simple, but human error increases and measurement accuracy decreases
Solution Approach 1:
The invention replaces manual construction of reference objects with automated computer-based systems that use 3D scanning, digital modeling, and algorithmic calculation. This substitution eliminates human error in measuring and constructing reference objects like the occlusal plane and arch form, while the software automation manages the complexity of these calculations and presentations.
Data Source
AI summary
System and method for automatic construction of orthodontic reference objects, such as the occlusal plane, arch form, and the local occlusal plane for a patient's teeth are disclosed. In accordance with an exemplary embodiment, a computer-implemented system and method for automatic construction of orthodontic reference objects comprises receiving three dimensional data for the teeth, setting an initial direction for a normal of the occlusal plane, determining tips for selected teeth, calculating a plane that matches the determined tip, and determining a new normal for the calculated plane.