Removable Denture with Metal Occlusion and Composite Facing

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Solution Overview

Problem

Conventional removable partial dentures experience discomfort due to the location of connectors above the tongue and suffer from loss of occlusal vertical dimension over time due to the nature of acrylic teeth, leading to poor mechanical strength and wear resistance.

Innovation Solution

A removable partial denture design featuring metal denture teeth cast together with a linguoplate and a composite facing, where the metal occlusal surface replaces acrylic teeth, and a resin material with a rigid and soft portion is used for enhanced bonding and comfort, with a titanium metal casting that maintains the occlusal vertical dimension.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If acrylic teeth are used in conventional removable partial dentures, then the denture can be easily manufactured and fitted, but the occlusal vertical dimension is lost over time due to wear and poor mechanical strength

Engineering Contradiction:

Improveease of manufactureVSAvoidocclusal vertical dimension stability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent uses a composite structure combining metal (titanium or titanium alloy) for the occlusal surface to provide wear resistance and mechanical strength, while maintaining the removable denture structure. The metal denture tooth or teeth are cast together with the linguoplate, creating a durable occlusal surface that prevents loss of vertical dimension over time.

Inventive Principle:

Principle #40Composite materials

2Reliability

If metal denture teeth are cast together with linguoplate, then mechanical strength and wear resistance are improved, but the manufacturing process becomes more complex

Engineering Contradiction:

Improvemechanical strengthVSAvoidease of manufacture

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent merges the denture tooth structure with the linguoplate by casting them together as a single metal component. This integration eliminates the need for separate attachment mechanisms and simplifies the overall manufacturing process while maintaining high mechanical strength and wear resistance of the metal occlusal surface.

Inventive Principle:

Principle #5Merging (Combining)

3Shape

If composite facing is bonded to metal denture tooth, then aesthetic appearance is improved, but the bonding process adds manufacturing steps

Engineering Contradiction:

Improveaesthetic appearanceVSAvoidease of manufacture

Core Design Contradiction:

ShapeVSEase of manufacture

Solution Approach 1:

The patent applies a composite facing material (such as porcelain or composite resin) bonded to the facial surface of the metal denture tooth. This combination provides the aesthetic appearance of natural teeth while maintaining the mechanical strength and wear resistance of the metal occlusal surface. The bonding process integrates the aesthetic layer with the functional metal structure.

Inventive Principle:

Principle #40Composite materials

4Reliability

If titanium metal occlusion is used, then occlusal vertical dimension is maintained and alveolar bone resorption is reduced, but the cost of materials increases

Engineering Contradiction:

Improveocclusal vertical dimension stabilityVSAvoidmaterial cost

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent applies titanium metal specifically to the occlusal surface and denture tooth structure where mechanical strength and bone preservation are most critical, while the rest of the denture base may use less expensive materials. This localized application of premium material provides the necessary functional benefits at the critical interfaces while controlling overall material costs.

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

The solution provides improved comfort and retention, maintains occlusal vertical dimension, and reduces alveolar bone resorption by using titanium metal occlusion and a composite facing, addressing the issues of mechanical strength and wear resistance.

Implementation Method 1

a resin material with a rigid and soft portion is used for enhanced bonding

Methodology Applied

Scientific EffectAdhesive bonding: Adhesive

Implementation Method 2

a titanium metal casting that maintains the occlusal vertical dimension

Methodology Applied

Scientific EffectMechanical support:

Implementation Method 3

a composite facing bonded to a facial surface of said at least one denture tooth

Methodology Applied

Scientific EffectAdhesive bonding: Adhesive

Data Source

PatentEP3139857B1Removable denture with metal denture tooth or teeth

Publication Date: 2021.02.17 JOY MEDICAL DEVICES CORP

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AI summary

The present invention provides a removable full or partial denture containing a linguoplate and metal occlusion of a restoring tooth or teeth with composite facing for restoring a tooth or teeth on the dental arch of a patient, wherein the denture utilizes a metal casting having the linguoplate, and at least one denture tooth on one side of the arch, and the at least one denture tooth is an extension of the linguoplate.