Osseointegrating Implant Peg with Segmented Lattice Structure

Solution Overview

Problem

Existing joint implants face challenges in being securely attached to the bone without becoming irreversibly fixed, making it difficult to remove them when necessary for replacement or treatment.

Innovation Solution

The implant features a bone contacting surface with an osseointegrating structure, such as a lattice design, limited to less than half the length of the implant peg, allowing secure attachment while enabling easy removal by minimizing bone removal during implant removal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the implant peg is provided with an osseointegrating structure along its entire length, then the fixation strength is improved, but the ease of removal deteriorates

Engineering Contradiction:

Improvefixation strengthVSAvoidease of removal

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The implant peg is divided into two distinct zones: an upper osseointegrating zone with a lattice structure for strong bone attachment, and a lower smooth zone without osseointegrating structure that allows for easier removal. This segmentation enables the implant to achieve both strong fixation and removable design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the implant peg are given different surface properties: the upper portion has an osseointegrating lattice structure to promote bone ingrowth and strong fixation, while the lower portion maintains a smooth surface to facilitate removal when needed. This local differentiation of properties resolves the contradiction between strong attachment and ease of removal.

Inventive Principle:

Principle #3Local quality

2Reliability

If the osseointegrating structure covers the entire implant peg, then the reliability of attachment is improved, but the loss of bone tissue worsens during removal

Engineering Contradiction:

Improveattachment reliabilityVSAvoidbone tissue loss

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The implant peg is divided into two distinct zones: an upper osseointegrating zone with a lattice structure for strong bone attachment, and a lower smooth zone without osseointegrating structure that allows for easier removal. This segmentation enables the implant to achieve both strong fixation and removable design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the implant peg are given different surface properties: the upper portion has an osseointegrating lattice structure to promote bone ingrowth and strong fixation, while the lower portion maintains a smooth surface to facilitate removal when needed. This local differentiation of properties resolves the contradiction between strong attachment and ease of removal.

Inventive Principle:

Principle #3Local quality

3Stability of the object's composition

If the implant is designed for strong osseointegration, then the stability of the implant is improved, but the adaptability for future removal or replacement deteriorates

Engineering Contradiction:

Improveimplant stabilityVSAvoidadaptability for removal

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The implant peg is divided into two distinct zones: an upper osseointegrating zone with a lattice structure for strong bone attachment, and a lower smooth zone without osseointegrating structure that allows for easier removal. This segmentation enables the implant to achieve both strong fixation and removable design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the implant peg are given different surface properties: the upper portion has an osseointegrating lattice structure to promote bone ingrowth and strong fixation, while the lower portion maintains a smooth surface to facilitate removal when needed. This local differentiation of properties resolves the contradiction between strong attachment and ease of removal.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20240325154A1Implant with osseointegrating structure

Publication Date: 2024.10.03 EPISURF IP MANAGEMENT

AI summary

An implant adapted to be attached to an implant receiving surface in a joint of a patient is provided. The implant includes a bone contacting surface, and at least one implant peg extending from the bone contacting surface, wherein both the bone contacting surface and a part of a surface area of the implant peg includes an osseointegrating structure, such as e.g. a lattice structure or a random lattice structure.