Virtual Dental Model with Inter-Proximal Surface Reconstruction

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Solution Overview

Problem

Current methods for planning and designing dental components, such as temporary restorations and diagnostic wax-ups, lack efficiency in visualizing and manufacturing precise dental models before actual preparation, especially in addressing surfaces not captured by 3D scans, like inter-proximal and sub-gingival areas.

Innovation Solution

A method involving 3D virtual modeling where a digital representation of teeth is obtained through scanning, sectioned using splines, and enhanced with inter-proximal surfaces and jaw-facing surfaces not initially available, allowing for virtual design and direct digital manufacturing of dental components like temporary bridges with accurate gingival integration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If traditional physical modeling methods are used for dental restoration planning, then tactile examination and manual adjustment are possible, but time consumption and material costs increase significantly

Engineering Contradiction:
Improvedental model accuracyVSAvoidplanning and manufacturing time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The patent creates a digital 3D copy of the patient's dentition through scanning, which serves as a virtual replica for planning and visualization. This digital copy replaces physical models, enabling precise measurements and adjustments without consuming physical materials or requiring lengthy manufacturing processes. The digital model can be instantly modified and reviewed, eliminating the time-consuming cycle of creating and adjusting physical models.

Inventive Principle:
Principle #26Copying

Solution Approach 2:

The patent replaces the mechanical system of physical model fabrication with a digital computing system. Instead of manually creating and adjusting physical dental models through mechanical processes, the system uses computer-based 3D scanning, modeling, and visualization tools. This substitution dramatically reduces time consumption while maintaining or improving measurement precision through digital measurement capabilities.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If 3D scanning is used to capture dental structures, then digital modeling efficiency improves, but surfaces like inter-proximal and sub-gingival areas remain uncaptured

Engineering Contradiction:
Improvedigital modeling efficiencyVSAvoidsurface data completeness
Core Design Contradiction:
ProductivityVSLoss of information

Solution Approach 1:

The patent applies preliminary geometric transformations and virtual extensions to the scanned dental model to anticipate and compensate for missing surface information. By pre-calculating and virtually constructing the uncaptured inter-proximal and sub-gingival surfaces based on available data and anatomical knowledge, the system prepares a complete virtual model before actual restoration fabrication, ensuring no critical surface information is lost.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent introduces computational algorithms and geometric modeling techniques as intermediaries to bridge the gap between scanned surfaces and complete dental anatomy. These computational tools act as mediators that infer and construct missing surface data from partial scans, using mathematical relationships and anatomical constraints to generate accurate representations of uncaptured areas like inter-proximal and sub-gingival surfaces.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Loss of substance

If virtual design is implemented for dental components, then material and time costs reduce, but accurate representation of hard-to-capture surfaces becomes challenging

Engineering Contradiction:
Improvematerial wasteVSAvoidsurface representation accuracy
Core Design Contradiction:
Loss of substanceVSManufacturing precision

Solution Approach 1:

The patent transitions from 2D scan data to 3D virtual models, adding dimensional information that enables accurate representation of complex surfaces. By working in three dimensions with full spatial information, the system can accurately model inter-proximal and sub-gingival surfaces that are difficult to capture in traditional 2D imaging, thereby maintaining manufacturing precision while reducing material waste through virtual design iterations.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS11727160B2Designing a virtual preparation and a virtual gingival
Publication Date: 2023.08.15 3SHAPE AS
  • US11727160B2 patent drawing
  • US11727160B2 patent drawing
  • US11727160B2 patent drawing

AI summary

A computer product for generating a digital 3D model for use in a dental component based on a digital 3D model of the dental component showing a shape of the teeth and a digital 3D representation of a pre-prepared set of teeth showing the region for which the dental component is intended, the product causing a system to generate a digital 3D combined model representing a target dental situation when the dental component is arranged at the teeth, where the instructions are configured for digitally replacing one or more teeth of the digital 3D representation of the pre-prepared set of teeth with the digital 3D model of the dental component by digitally removing the one or more teeth of the digital 3D representation of the pre-prepared set of teeth and adding the digital 3D model of the dental component to the digital 3D representation of the pre-prepared set of teeth.