3D Digital Tooth Model Pairing for Symmetric Clearance Adjustment

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Solution Overview

Problem

Adjusting an arrangement of multiple three-dimensional digital tooth models for dental restorations is a challenging and labor-intensive task, particularly in ensuring symmetrical appearance while preventing intersections with antagonistic structures.

Innovation Solution

A computer-implemented method for adjusting two or more three-dimensional digital tooth models by determining and applying concurrent transformations and shape-deforming adjustments to maintain symmetry and prevent intersections, utilizing local coordinate frames and mirror symmetry to synchronize adjustments across models.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If individual minimum shape-deforming adjustments are applied to each tooth model to prevent intersections with antagonistic structures, then intersection prevention is achieved, but symmetrical appearance of paired tooth models cannot be maintained

Engineering Contradiction:

Improveintersection preventionVSAvoidsymmetrical appearance

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

The patent merges the adjustment processes of paired tooth models by determining a single largest shape-deforming adjustment from either model and applying it to both. This combining approach ensures that both models maintain sufficient clearance from antagonistic structures while preserving symmetrical appearance, resolving the contradiction between intersection prevention and symmetry maintenance.

Inventive Principle:

Principle #5Merging (Combining)

2Manufacturing precision

If manual adjustment of each tooth model is performed individually, then precise control over each model is achieved, but the task becomes time-consuming and labor-intensive

Engineering Contradiction:

Improveadjustment precisionVSAvoidadjustment time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The system performs self-service by automatically determining transformations and shape-deforming adjustments for paired tooth models based on a single input transformation. The computer system autonomously calculates the largest adjustment required and applies it to both models, eliminating the need for manual individual adjustments while maintaining precision and reducing time consumption.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent implements feedback mechanisms where the system continuously monitors the arrangement of tooth models against antagonistic structures and automatically adjusts transformations and shape-deforming adjustments in real-time. This feedback loop ensures precise adjustment while minimizing manual intervention and time consumption.

Inventive Principle:

Principle #23Feedback

3Adaptability or versatility

If transformations are applied to tooth models without considering antagonistic structures, then adjustment flexibility is maintained, but intersections with antagonistic structures occur

Engineering Contradiction:

Improveadjustment flexibilityVSAvoidintersections with antagonistic structures

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary anti-action by proactively determining shape-deforming adjustments to prevent intersections with antagonistic structures before they occur. The system calculates the necessary adjustments in advance and applies them concurrently with transformations, maintaining adjustment flexibility while preventing harmful intersections.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The system performs preliminary action by determining the largest shape-deforming adjustment required to prevent intersections before finalizing the transformation. This preliminary calculation ensures that adjustments are built into the transformation process itself, maintaining flexibility while preventing intersections with antagonistic structures.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250391136A1Concurrent adjusting of tooth models

Publication Date: 2025.12.25 EXOCAD

AI summary

Disclosed is a computer-implemented method for adjusting two or more three-dimensional digital tooth models of a tooth set of three-dimensional digital tooth models of a jaw. The tooth set is a tooth set for a dental restoration. The method comprises receiving a three-dimensional digital dentition model, pairing a first and second three-dimensional digital tooth model of the tooth set, receiving an input defining a first transformation of the first three-dimensional digital tooth model, determining for the first transformation a first measure of an additional first shape-deforming, determining a second transformation of the second three-dimensional digital tooth model, determining for the second transformation a second measure of an additional second shape-deforming, determining a largest one of the two shape-deforming adjustments comprising a largest one of the two measures, adjusting the first and second three-dimensional digital tooth model.