Dental Prosthetic Design Using Pre-Prepared Attrition Shape Data
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Solution Overview
Problem
Current methods for designing dental prostheses using CAD/CAM techniques do not efficiently account for tooth attrition, leading to increased design time and difficulty in harmonizing the prosthetic device with the patient's intraoral environment.
Innovation Solution
A method and apparatus that acquire scan data of maxillary and mandibular dentitions, determine restoration sites, read and select attrition shape data with varying degrees of attrition, and create shape data for dental prosthetic devices using a computer, incorporating attrition shape data to match the patient's intraoral environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional CAD/CAM methods are used to design dental prostheses, then the design process can be performed on a computer, but the design time increases and the ability to harmonize with patient's intraoral environment deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-preparing multiple attrition shape data sets with different degrees of attrition (first, second, third sets) before the actual design process. When designing a prosthesis, the system can directly select and apply the appropriate attrition shape data based on the patient's condition, eliminating the need to create attrition shapes during design time. This pre-preparation significantly reduces design time while maintaining the ability to harmonize with the patient's intraoral environment.
2Manufacturing precision
If multiple attrition shape data sets are prepared and selected based on degree of attrition, then the accuracy of matching patient's intraoral environment improves, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by organizing attrition shape data into multiple sets differentiated by the degree of attrition (first set for mild attrition, second set for moderate attrition, third set for severe attrition). Each set contains shape data with specific parameter characteristics corresponding to different attrition levels. The system selects the appropriate set based on the patient's actual attrition degree, thereby achieving high matching accuracy without requiring a single overly complex data structure.
Solution Approach 2:
The patent segments the attrition shape data into distinct sets based on the degree of attrition. Instead of using one comprehensive complex data set, the invention divides the data into multiple specialized sets (first, second, third sets), each optimized for specific attrition conditions. This segmentation makes the system more manageable and easier to query, reducing the effective complexity during operation while improving precision through targeted selection.
3Adaptability or versatility
If attrition shape data is selected and placed at restoration sites, then the compatibility of the prosthetic device improves, but the design process complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-organizing attrition shape data into multiple sets with different degrees of attrition before the design process. During design, the system automatically selects the appropriate attrition shape data from the pre-prepared sets based on the patient's condition and places it at the restoration site. This eliminates the need to manually create or calculate attrition shapes during design, improving compatibility while actually simplifying the design process through automation.
Data Source
AI summary
A dental prosthetic device design method according to an aspect of the present invention is a method for designing a dental prosthetic device by a computer, the method including: acquiring scan data of maxillary and mandibular dentitions; determining a restoration site of a tooth, based on the scan data; reading out plural pieces of attrition shape data of a tooth related to the restoration site, from maxillary and mandibular tooth shape data sets having plural pieces of attrition shape data with different degrees of attrition for each tooth of the maxillary and mandibular dentitions; selecting attrition shape data from among the plural pieces of attrition shape data, in accordance with the degrees of attrition of the maxillary and mandibular dentitions; placing the selected attrition shape data at the restoration site; and creating shape data of a dental prosthetic device from the attrition shape data placed at the restoration site.