High Molecular Weight Acrylic Denture Base Material

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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, which compromises their yield point strength and longevity.

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 and optionally a rubber component, which enhances flexural strength and impact resistance, preventing breakage over time.

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, making it more prone to breakage

Engineering Contradiction:

Improveelastic modulusVSAvoidyield point strength in compression test

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The invention changes the molecular weight parameter of the polymer component to 1,200,000 or more, which fundamentally alters the material properties. This parameter change enables the material to simultaneously achieve high elastic modulus for resistance to deformation and high yield point strength in compression to prevent breakage, resolving the contradiction between hardness and durability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention uses a composite material system comprising a polymer component (with specific high molecular weight 1,200,000 or more) and an inorganic filler component. This composite structure allows the material to combine the advantages of both components: the polymer provides toughness and elasticity while the inorganic filler enhances strength and stiffness, thereby achieving both high elastic modulus and high yield point strength

Inventive Principle:

Principle #40Composite materials

2Ease of manufacture

If conventional polymer materials are used for denture base, then the material is easy to manufacture and process, but the denture base breaks easily after long-term use due to low durability

Engineering Contradiction:

Improvemanufacturability of denture baseVSAvoidservice life of denture base

Core Design Contradiction:

Ease of manufactureVSDuration of action of stationary object

Solution Approach 1:

The invention dramatically increases the molecular weight parameter of the polymer component to 1,200,000 or more, which fundamentally improves the durability and resistance to degradation of the denture base material while maintaining its processability and ease of manufacture. This parameter change ensures the denture base can withstand long-term use without breaking

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If the polymer component has low molecular weight, then the material is easier to process and manufacture, but the denture base lacks durability and breaks easily over time

Engineering Contradiction:

Improveprocessability of polymer materialVSAvoiddurability of denture base

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The invention sets the molecular weight parameter of the polymer component to 1,200,000 or more, which optimizes the balance between processability and durability. At this high molecular weight, the polymer maintains sufficient processability for manufacturing while achieving the durability and resistance to breakage required for long-term clinical use

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10206762B2Material for denture base, denture base, method of manufacturing the denture base, plate denture, and method of manufacturing the plate denture

Publication Date: 2019.02.19 MITSUI CHEMICALS INC

AI summary

Disclosed is a material for a denture base containing a polymer component and containing an acrylic resin.