Elbow Prosthesis with Set Plate for Minimally Invasive Implantation

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Solution Overview

Problem

Current surgical techniques for joint prostheses, particularly in canine elbow joints, suffer from high failure rates due to technical difficulties and excessive soft tissue damage, leading to invasive procedures and prolonged recovery times.

Innovation Solution

A novel elbow joint prosthesis with unique bone-stabilizing pegs and bone-receiving beads, along with a set plate member for minimally invasive implantation, which reduces trauma and promotes bone ingrowth, allowing for a single-step implantation without disarticulation of the joint.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional surgical techniques are used for joint prosthesis implantation, then the joint can be replaced, but the procedure causes excessive soft tissue damage and high failure rates

Engineering Contradiction:

Improveimplant success rateVSAvoidsoft tissue damage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The prosthesis is divided into multiple components: a first member with bone fixation surface and articulating surface, a second member with complementary surfaces, and a set plate member. This segmentation allows each component to perform specific functions (fixation, articulation, positioning) while minimizing overall trauma to the joint structure during implantation

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The set plate member acts as an intermediary tool that releasably links the first and second members during implantation. It aids in positioning the implant components correctly and facilitates a minimally invasive single-step implantation procedure without requiring disarticulation of the joint

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If invasive surgical procedures are used, then the prosthesis can be implanted, but prolonged physical therapy and recovery are required

Engineering Contradiction:

Improverecovery speedVSAvoidsurgical procedure complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The implantation procedure merges multiple steps into a single minimally invasive operation. The set plate member enables simultaneous positioning and linking of both prosthesis members in one step, eliminating the need for separate implantation procedures and joint disarticulation, thereby reducing surgical complexity and accelerating recovery

Inventive Principle:

Principle #5Merging (Combining)

3Stability of the object's composition

If traditional implantation methods are used, then the joint can be replaced, but excessive pulling of ligaments occurs

Engineering Contradiction:

Improveligament integrityVSAvoidimplantation ease

Core Design Contradiction:

Stability of the object's compositionVSEase of operation

Solution Approach 1:

The prosthesis design incorporates local quality features: the first and second members have specific bone fixation surfaces with intersecting concave and convex surfaces that engage locally with bone structures. This localized engagement provides stable fixation without requiring excessive ligament manipulation, making the procedure easier while preserving ligament integrity

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS9782184B2Milling apparatus for implanting a joint prosthesis

Publication Date: 2017.10.10 BIOSHIFT LLC

AI summary

A novel and improved elbow prosthesis and method of implanting same including a novel aggregate prosthesis having a retaining system in conjunction with a set plate.