Dental Prosthesis Framework with Model Parts for Veneer Contouring

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Solution Overview

Problem

Current methods for producing dental prostheses with frameworks and veneers face challenges such as limited application due to material strength, aesthetic concerns, and difficulties in matching thermal expansion coefficients, leading to stress and quality variations in the veneering process, especially when dealing with frameworks having undercuts or opaque layers.

Innovation Solution

A set of elements comprising a framework and model parts that define the outer contour of the veneer with a gap between them, allowing for precise adaptation and use of adhesives and materials that can be melted or burned out, enabling the production of dental prostheses with improved mechanical and aesthetic properties through computer-aided design and rapid prototyping methods.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If manual veneering methods are used to apply ceramic layers to frameworks, then aesthetic results and mechanical properties are improved, but production time increases and quality varies depending on operator skill

Engineering Contradiction:

Improveveneer application qualityVSAvoidproduction time

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent replaces manual mechanical application methods with an automated spraying system that uses compressed air to atomize and deposit veneering material. This substitution eliminates operator skill dependency and reduces production time while maintaining consistent quality through controlled spray parameters.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The invention controls veneer application quality by adjusting spray parameters including air pressure, spray distance, and material flow rate. These parameter changes enable precise control over layer thickness and uniformity, achieving consistent results without manual intervention.

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If electrophoresis is used to apply veneering ceramic to metal frameworks, then uniform layers are created, but manual finishing remains unavoidable and the method is limited to electrically conductive surfaces

Engineering Contradiction:

Improvelayer uniformityVSAvoidmethod applicability

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent replaces the electrophoresis electrical field system with a mechanical spray deposition system using compressed air. This substitution removes the electrical conductivity requirement, allowing application on any framework surface including ceramics and plastics, while maintaining layer uniformity through controlled spray parameters.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The spray deposition method is universally applicable to various framework materials including metals, ceramics, and plastics, regardless of electrical conductivity. This multi-functionality expands the method's applicability beyond the limitations of electrophoresis while achieving similar uniformity results.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If standardized molds are used for producing dental prostheses, then production efficiency is improved, but adaptation to individual case conditions becomes difficult

Engineering Contradiction:

Improveproduction efficiencyVSAvoidcase-specific adaptation

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent applies local quality by allowing different regions of the framework to receive varying spray parameters and material compositions. This enables customization for individual case conditions while maintaining efficient automated production, as each local area can be tailored to specific aesthetic or functional requirements.

Inventive Principle:

Principle #3Local quality

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach simplifies the production of dental prostheses by allowing for precise adaptation and reduced material waste, improving the mechanical and aesthetic properties while accommodating frameworks with undercuts and opaque layers, resulting in more efficient and consistent veneering processes.

Implementation Method 1

the gap is filled with an adhesive and the model part is fixed on the framework by means of the adhesive

Methodology Applied

Scientific EffectAdhesion: Adhesive

Implementation Method 2

The assembly is surrounded by an embedding material

Methodology Applied

Scientific EffectPhysical containment: Physical Containment

Data Source

PatentUS8636512B2Set of elements for producing a dental prosthesis, system for producing a dental prosthesis or a set of elements, and corresponding production methods

Publication Date: 2014.01.28 BEGO BREMER GOLDSCHLAGEREI WILH HERBST

AI summary

A set of elements is described for use in the production of a dental prosthesis (20), in particular of a crown, a bridge, an inlay or an onlay, comprising:a framework (3) andone or more model parts (5) for defining parts of the outer contour of a veneer (15) for the framework (3),wherein the model part or parts (5) can be mounted on the framework (3) in such a way that, at one and the same time,(i) a gap (7) remains between the model part or parts (5) and the framework (3) and(ii) the model part or parts (5) define parts [lacuna] the outer contour.Corresponding methods and systems are also described.