3D Dental Margin Line Mapping for Prosthesis Bonding
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Solution Overview
Problem
Conventional methods for manufacturing dental prostheses using virtual models face inaccuracies due to operator skill dependence, leading to gaps between teeth and prostheses, weakened bonding forces, and potential caries from saliva or impurities penetration.
Innovation Solution
A method and apparatus for setting a margin line using three-dimensional virtual model data from an oral scanner, involving curve and color information to accurately define the boundary between teeth and prostheses, preventing gaps and enhancing bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional virtual model methods are used for manufacturing dental prostheses, then the manufacturing process can be simplified and time reduced, but the margin line setting accuracy deteriorates due to operator skill dependence
Solution Approach 1:
The patent replaces manual operator-based margin line setting with an automated computer-based system that uses curve information generation and color information analysis to automatically determine the margin line position, eliminating dependence on operator skill while maintaining high precision
Solution Approach 2:
The patent introduces multiple parameters including curve information (curvature values at different points), color information (reflecting tooth-gum boundaries), and depth information to comprehensively determine margin line position, transforming the single-parameter manual setting into a multi-parameter automated system
2Measurement precision
If manual impression taking and plaster manufacturing are used, then detailed tooth information can be captured, but the process time increases and patient discomfort occurs
Solution Approach 1:
The patent uses optical scanning to create a digital 3D copy of the patient's teeth and surrounding structures, replacing the physical impression-taking process while maintaining measurement accuracy and eliminating patient discomfort associated with impression materials
Solution Approach 2:
The patent replaces the mechanical impression-taking process with optical scanning technology that captures tooth geometry and color information digitally, significantly reducing process time while eliminating the need for physical plaster manufacturing
3Ease of manufacture
If inaccurate margin line setting occurs, then the manufacturing process is simpler, but gaps occur between tooth and prosthesis leading to weakened bonding and potential caries
Solution Approach 1:
The patent uses color information as feedback to verify margin line position accuracy, where the color characteristics of tooth and gum tissues help confirm that the margin line is correctly positioned at the boundary, ensuring reliable bonding while maintaining manufacturing simplicity
Solution Approach 2:
The patent incorporates multiple parameters including curve information, color information, and depth information to comprehensively determine margin line position, ensuring accurate bonding interfaces without complicating the manufacturing process through automated multi-parameter analysis
Data Source
AI summary
Disclosed are an apparatus and method for setting a margin line and a recording medium, wherein the apparatus and method set a margin line corresponding to the outline of the boundary between a tooth and a prosthesis on the basis of three-dimensional virtual model data of the tooth obtained by using a three-dimensional scanner such as an oral scanner or the like. The method for setting a margin line according to an embodiment of the present disclosure, comprises the steps of: generating curve information about the peripheral area of the margin line candidate points selected in a three-dimensional virtual model obtained for a tooth; and setting a margin line indicating the outline of the boundary between the tooth and a prosthesis on the basis of the curve information.