Wire Mesh Composite Dental Prosthesis Resolving Polymerization Shrinkage

Solution Overview

Problem

Existing dental prostheses face issues with polymerization shrinkage leading to tooth fragmentation, inadequate stability, and aesthetic concerns due to residual shrinkage effects, as well as flexibility in the root base causing fractures and rotation of the restored tooth.

Innovation Solution

A lightweight, durable, monolithic bend-resistant dental prosthesis with a double coronal-root reinforcing supporting part and a dental restorative material part, featuring expanding frames and mesh coronal-root frames that encapsulate the coronal part, providing dual reinforcement and preventing root fractures and rotation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If traditional composite restoration methods are used, then the tooth structure can be restored, but polymerization shrinkage causes tooth fragmentation and instability

Engineering Contradiction:

Improvetooth restoration strengthVSAvoidrestoration stability

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The prosthesis is divided into two distinct parts: a root part with mesh reinforcement and a coronal part with expanding frame. This segmentation allows each part to address specific functional requirements - the root part provides stability against polymerization shrinkage while the coronal part provides structural strength, resolving the contradiction between strength and reliability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention uses composite construction combining metal mesh, expanding frames, and dental restorative materials. The mesh and frame provide structural reinforcement while the composite material fills and restores the tooth, creating a unified structure that eliminates polymerization shrinkage effects and prevents fragmentation

Inventive Principle:

Principle #40Composite materials

2Adaptability or versatility

If the root base is made flexible to accommodate tooth structure, then adaptation is improved, but fractures and rotation of the restored tooth occur

Engineering Contradiction:

Improveroot base adaptationVSAvoidroot base strength

Core Design Contradiction:

Adaptability or versatilityVSStrength

Solution Approach 1:

The root base is reinforced with mesh only in specific critical areas where strength is needed, while other areas maintain flexibility for adaptation. This localized reinforcement provides fracture resistance and prevents rotation without compromising the adaptability of the overall root base structure

Inventive Principle:

Principle #3Local quality

3Device complexity

If a simple single-part prosthesis is used, then device complexity is reduced, but bend resistance and durability are insufficient

Engineering Contradiction:

Improveprosthesis structureVSAvoidbend resistance

Core Design Contradiction:

Device complexityVSStrength

Solution Approach 1:

The prosthesis is divided into two distinct parts: a root part with mesh reinforcement and a coronal part with expanding frame. This segmentation allows each part to address specific functional requirements - the root part provides stability against polymerization shrinkage while the coronal part provides structural strength, resolving the contradiction between strength and reliability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention uses composite construction combining metal mesh, expanding frames, and dental restorative materials. The mesh and frame provide structural reinforcement while the composite material fills and restores the tooth, creating a unified structure that eliminates polymerization shrinkage effects and prevents fragmentation

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS20200229898A1Wire mesh composite prosthesis

Publication Date: 2020.07.23 MELIKYAN MELIKSET LITVINOVICH

AI summary

The invention relates to the field of dentistry. The present invention according to the first aspect provides a lightweight, durable monolithic bend-resistant dental prosthesis intended to eliminate of tooth defects, such as missing coronal portion at the gumline, 2 mm above the gumline and below the gumline which comprises a double coronal-root reinforcing, supporting part and a dental restorative material part. The dental restorative material part encapsulates the coronal part of the double coronal-root reinforcing, supporting part. The double coronal-root reinforcing, supporting part comprises at least one expanding frame and a mesh coronal-root frame positioned in the root and coronal parts of the double coronal-root reinforcing, supporting part. The at least one expanding frame comprises a plurality of wires, and the at least one expanding frame is directed by its wider part to an end part of the dental restorative material part far from the root part of the double coronal-root reinforcing, supporting part.