Denture Base Material with High Molecular Weight Acrylic Resin

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Solution Overview

Problem

Conventional polymer-containing denture bases tend to break easily due to low durability, even when made with hard materials, as they lack sufficient yield point strength in compression tests, and existing methods struggle to enhance durability while maintaining flexibility and impact resistance.

Innovation Solution

A denture base material with a polymer component having a weight average molecular weight of 1,200,000 or more, containing an acrylic resin, which provides enhanced flexural strength, impact resistance, and durability by incorporating a rubber component for improved multidirectional force resistance and reduced cracking during manufacturing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a hard material with high elastic modulus is used to enhance durability, then the denture base becomes more resistant to deformation, but the yield point strength in compression test decreases and the denture base becomes more prone to breakage

Engineering Contradiction:

Improveelastic modulusVSAvoidyield point strength in compression test

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The invention uses a composite material system consisting of acrylic resin particles (0.1-5.0 mm in diameter) dispersed in a denture base resin. The acrylic resin particles act as reinforcement that improves yield point strength in compression tests while maintaining appropriate elastic modulus, resolving the contradiction between hardness and compressive strength

Inventive Principle:

Principle #40Composite materials

2Length of moving object

If the denture base is made thinner for comfort, then patient comfort improves, but the denture base becomes more prone to breakage due to reduced structural integrity

Engineering Contradiction:

Improvedenture base thicknessVSAvoidbreakage resistance

Core Design Contradiction:

Length of moving objectVSReliability

Solution Approach 1:

The composite structure with acrylic resin particles dispersed in the denture base resin provides enhanced mechanical properties that allow the denture base to be made thinner while maintaining breakage resistance. The particles reinforce the material, enabling reduced thickness without compromising reliability

Inventive Principle:

Principle #40Composite materials

3Ease of manufacture

If conventional polymer materials are used for the denture base, then the manufacturing process is simple, but the denture base lacks sufficient durability and yield point strength

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoiddurability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The invention incorporates acrylic resin particles into the denture base resin to create a composite material that significantly improves durability and yield point strength. The manufacturing process remains relatively simple, involving mixing the particles with the resin and curing, thus maintaining ease of manufacture while enhancing reliability

Inventive Principle:

Principle #40Composite materials

Data Source

PatentEP3095413B1Material for denture base; denture base and manufacturing method thereof; plate denture and manufacturing method thereof

Publication Date: 2019.05.01 MITSUI CHEMICALS INC

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AI summary

Disclosed is a material for a denture base containing a polymer component having a weight average molecular weight of 1,200,000 or more and containing an acrylic resin.