Modular Hip Resurfacing Implant with Adjustable Neck-Shaft Angle

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional hip arthroplasty methods, including total hip replacement and resurfacing prostheses, fail to provide a lasting solution for young and active patients with end-stage hip arthritis due to high technical difficulty and complication rates, necessitating a more invasive and less effective approach.

Innovation Solution

A minimal invasive hip arthroplasty device comprising a long nail portion, lag screw portion, distal locking screws, and a resurfacing head, designed for insertion into the femur with oblique and perpendicular configurations to anchor and stabilize the prosthesis, allowing for adjustable fitting and reduced invasive procedures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional total hip replacement is performed, then arthritis is treated, but the solution is not lasting for young and active patients

Engineering Contradiction:

Improvelasting solutionVSAvoidsuitability for young and active patients

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The device segments the femoral stem into modular components with variable neck-shaft angles, allowing customization for different patient needs while ensuring long-term reliability through precise anatomical alignment

Inventive Principle:

Principle #1Segmentation

2Ease of operation

If resurfacing prosthesis is used, then less invasive procedure is performed, but technical difficulty and complication rate are high

Engineering Contradiction:

Improveminimal invasive procedureVSAvoidtechnical difficulty

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The device introduces a modular stem system as an intermediary between traditional replacement and resurfacing, providing variable neck-shaft angles that simplify the surgical procedure while maintaining the benefits of minimal invasiveness

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of manufacture

If fixed neck-shaft angle prosthesis is used, then manufacturing is simplified, but adaptability to different patient needs is reduced

Engineering Contradiction:

Improvefixed angle designVSAvoidneck-shaft angle adjustment

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The device transitions from a fixed-angle design to a dynamic modular system where the neck-shaft angle can be adjusted during surgery to match the patient's anatomical requirements, improving adaptability while maintaining manufacturing simplicity through standardized modules

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS8840675B2Durable resurfacing hip replacement device

Publication Date: 2014.09.23 OMNES MEDICAL INC

AI summary

A minimal invasive hip arthroplasty device is provided. The device includes a long nail portion, a lag screw portion, distal locking screws, and a resurfacing head. The long nail portion is inserted into a shaft body of a femur from a top portion of the femur and disposed in the femur. The lag screw portion engages and anchors at the long nail portion through a lag screw hole, and the lag screw portion is inserted into a neck of the femur. The distal locking screws queue through the shaft body of the femur perpendicularly and fix the long nail portion to the femur further. The resurfacing head includes a cup portion configured to cover a head of the femur and a fixing pin portion configured to be inserted into the head and the neck of the femur and engaging the lag screw portion through a resurfacing head hole.