Prosthesis Nerve Retainer Channel Design

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Solution Overview

Problem

Current jaw prosthetics often require cutting the nerve during surgical removal of a jawbone section, leading to loss of sensation in teeth and the lower lip, as existing solutions do not effectively protect and accommodate the nerve during replacement procedures.

Innovation Solution

A prosthesis with a closable receptacle channel for the nerve, embedded in a first part and closable by a second part, providing protection and easy accommodation, along with implant receptacles for stable fixation, and optionally formed from a lattice structure or solid material with a viscous medium for nerve protection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the nerve is cut during surgical removal of the jawbone section, then the bone replacement can be performed simply, but the patient loses sensation in teeth and lower lip

Engineering Contradiction:

Improvesurgical procedure simplicityVSAvoidnerve damage

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The nerve is extracted from the bone structure and placed into a dedicated receptacle channel within the prosthesis, separating the nerve from the bone removal process and allowing bone replacement without nerve damage

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The nerve is nested within the receptacle channel of the prosthesis, allowing the nerve to be protected and accommodated inside the bone replacement structure

Inventive Principle:

Principle #7Nested doll (Nesting)

2Device complexity

If a one-piece prosthesis design is used, then the structure is simple, but the nerve cannot be easily accommodated and protected

Engineering Contradiction:

Improveprosthesis structureVSAvoidnerve accommodation

Core Design Contradiction:

Device complexityVSEase of operation

Solution Approach 1:

The prosthesis is segmented into multiple parts with a separate receptacle channel for the nerve, allowing the nerve to be accommodated before final assembly and providing better protection compared to a one-piece design

Inventive Principle:

Principle #1Segmentation

3Ease of operation

If the nerve receptacle is not closable, then the nerve can be easily inserted, but the nerve is not protected on all sides

Engineering Contradiction:

Improvenerve insertionVSAvoidnerve exposure

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The receptacle channel is designed with a movable second part that can be opened for nerve insertion and then closed to protect the nerve, providing both easy accommodation and complete protection

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The nerve is placed into the receptacle channel before the second part is closed, allowing the nerve to be positioned correctly before final protection is established

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP2716259B1Prosthesis with nerve holder

Publication Date: 2016.12.14 SCHNEIDER ROSI

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Figure 4

AI summary

The prosthesis (12) has a connection unit (16) formed at ends for fixing the prosthesis at bone or joint parts, where the ends are turned away from each other, where the prosthesis is made from solid material. A nerve retainer retains nerve (4) and extends between the ends of the prosthesis. The retainer is formed by a retaining channel and inserted into a prosthesis part. The channel is locked by another prosthesis part that is supported at the former prosthesis part in a movable manner over a hinge-like joint. An implant retainer is formed at an outer side of the prosthesis.