Artificial Knee Joint Surface Clamping Fixation
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Solution Overview
Problem
Conventional knee replacement surgeries face challenges in providing a stable and durable artificial knee joint surface that effectively addresses the wear and tear caused by osteoarthritis, leading to limited range of motion and pain, especially in maintaining the natural movement and weight-bearing capabilities of the knee joint.
Innovation Solution
A medical device comprising an artificial knee joint surface with a curved outer surface and a hollow inner surface, featuring a central part and a surrounding part, designed to replace the femoral and tibial condyles, with a beyond part extending to create a stable position and a movable member for adjusting the closest distance to the center axis, allowing for secure fixation without penetration of the femoral cortex, using materials like elastic polymers or biocompatible metals for durability and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional prosthesis is placed on the condyles with a single cut approach, then the surgical procedure is simpler and faster, but the stability and durability of the artificial knee joint surface is compromised
Solution Approach 1:
The medical device is divided into at least two separate parts that are implanted and connected within the knee joint. This segmentation allows each part to be optimized for specific functions (e.g., one part for the femoral condyle, another for the tibial plateau) while maintaining overall stability and durability without requiring a single large invasive cut.
2Stability of the object's composition
If the medical device has a hollow inner surface with beyond parts extending beyond the condyle, then the stability and fixation security is improved, but the device complexity increases
Solution Approach 1:
The hollow inner surface configuration with beyond parts extending beyond the condyle creates a nested structure where the device fits within the bone anatomy while having protruding elements for secure fixation. This nesting approach provides enhanced stability without requiring excessive external complexity.
3Ease of operation
If the artificial knee joint surface is designed to mimic natural movement with curved surfaces, then the range of motion and natural feel is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The medical device incorporates curved outer surfaces and spherical or spheroidal contact surfaces that mimic the natural curvature of the knee joint. This curvature design enables natural range of motion and movement patterns while the modular construction helps manage manufacturing precision requirements through standardized curved components.
Data Source
AI summary
A method for implanting a medical device in a knee joint of a human patient, said method comprising the steps of cutting the skin of a human patient, dissecting an area of the knee joint, introducing the medical device comprising a first part and second part into the knee joint, and attaching the first part and second part of the medical device such that said medical device clasps a portion of a bone of the knee joint.