Intra-Articular Prosthesis With Unattached Bone Support
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Solution Overview
Problem
Existing joint replacement methods, such as interpositional arthroplasty, face challenges in securely attaching prosthetic implants to bone structures, leading to potential detachment and instability.
Innovation Solution
A method of implanting a prosthesis that forms a concavity in the bone using a shaping tool, creating a support layer without attachment, allowing the prosthesis to articulate freely, and using a surgical kit with graduating tools for precise fitting and reinforcement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the prosthesis is attached to the bone support layer, then the attachment strength is improved, but the articulation smoothness deteriorates due to interference with natural joint movement
Solution Approach 1:
The patent introduces a biological interface layer (bone support layer) as an intermediary between the prosthesis and the bone. This layer allows the prosthesis to remain unattached while still providing structural support and enabling smooth articulation, as the bone layer naturally conforms to the prosthesis surface without mechanical attachment interference
2Ease of operation
If the prosthesis is left unattached to allow free articulation, then the articulation smoothness is improved, but the stability and risk of detachment worsen
Solution Approach 1:
The patent employs the body's natural biological processes to serve the implantation function. The bone support layer self-organizes and conforms to the prosthesis surface through natural bone remodeling and growth, providing stable support without requiring external attachment mechanisms. This biological self-service ensures both smooth articulation and long-term stability
3Strength
If traditional attachment methods are used to secure the prosthesis, then the attachment strength is improved, but the complexity of the implantation procedure worsens
Solution Approach 1:
The patent extracts and eliminates the attachment mechanism from the implantation procedure. By removing the need for screws, cement, or other fixation devices, the procedure is simplified to only require creating the concavity and placing the prosthesis, while the bone support layer naturally provides the necessary support function
Data Source
AI summary
Methods of implanting a prosthesis to repair a joint include exposing a first bone of the joint; resecting an end portion of the first bone to form a resected end defining a resection plane; forming a concavity in the resected end portion of the first bone using a shaping tool, the concavity extending at least through a full hemispherical arc; selecting a diameter of the prosthesis to be implanted; and implanting a prosthesis having the selected diameter in the concavity.