Virtual Setup for Mixed Dentition Using Deciduous Tooth Substitution
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Solution Overview
Problem
Current methods face challenges in achieving accurate virtual setups for orthodontic planning in patients with mixed dentition, as they struggle to predict the eventual size of permanent teeth and the adult jaw, making it difficult to visualize and plan effective treatment for younger patients with a combination of deciduous and permanent teeth.
Innovation Solution
The method involves detecting deciduous teeth in a virtual setup and replacing them with corresponding permanent teeth models, which have different sizes and shapes, using segmented 3D mesh analysis and CBCT volume data to ensure accurate substitution, allowing for jaw growth consideration and simulation of future tooth arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional virtual setup methods are used for mixed dentition, then the process is simple, but the accuracy of predicting permanent tooth size and jaw growth is poor
Solution Approach 1:
The patent applies preliminary action by detecting and substituting deciduous teeth with corresponding permanent tooth models before final treatment planning. This advance substitution allows the virtual setup to predict future tooth arrangement and jaw growth accurately, resolving the contradiction between simplicity and accuracy by performing the critical substitution step early in the process
Solution Approach 2:
The patent changes key parameters by replacing deciduous tooth models with permanent tooth models based on anatomical correspondence. This parameter change (tooth type substitution) transforms the virtual setup from representing current mixed dentition to predicting future permanent dentition, thereby improving measurement precision while managing complexity through systematic parameter transformation
2Reliability
If deciduous teeth are substituted with permanent tooth models, then the virtual setup accuracy improves, but the complexity of the setup process increases
Solution Approach 1:
The substitution of deciduous teeth with permanent tooth models is performed as a preliminary action before treatment planning. This advance preparation ensures that the virtual setup accurately represents the expected permanent dentition, thereby improving reliability while containing complexity within a defined preliminary phase
Solution Approach 2:
The patent uses copying by creating virtual models of permanent teeth based on anatomical correspondence with deciduous teeth. This copying approach allows accurate representation of future tooth arrangement without requiring physical permanent teeth to be present, improving reliability while managing complexity through virtual replication
Data Source
AI summary
A method for visualizing patient dentition acquires a contour image of patient dentition and segments the contour image to identify one or more segmented teeth. At least one deciduous tooth among the one or more segmented teeth is identified. A virtual model of a target dentition arrangement of the patient dentition is generated, wherein the at least one deciduous tooth is replaced by a replacement permanent tooth.