Glenoid Implant Resurfacing via Hemispherical Excision
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Solution Overview
Problem
Articular cartilage defects on bones, such as the shoulder, are challenging to repair due to the inability of hyaline cartilage cells to regenerate, leading to the formation of less durable fibrocartilage, and existing implants often require a shape matching the native cartilage to ensure comfort and functionality.
Innovation Solution
A system and method for resurfacing articular surfaces using an implant with a load-bearing surface matching the original contour, featuring a cannulated excision device that forms a hemispherical excision site with cutters and a guide pin to minimize surgical invasion and maximize the retention of the patient's original articular surface, allowing for 'key-hole' surgery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cartilage repair methods are used, then healing occurs through fibrocartilage formation, but the repaired cartilage is less durable and lacks the unique properties of native hyaline cartilage
Solution Approach 1:
The patent extracts and removes the damaged cartilage tissue completely through excision, eliminating the source of poor-quality fibrocartilage formation. By removing the defective tissue rather than attempting to repair it in place, the system prevents the generation of harmful low-quality cartilage while creating a clean recipient site for the implant.
Solution Approach 2:
The implant is designed to copy and replicate the native articular surface contour and geometry. By creating an implant that matches the original cartilage shape, the system restores the unique properties of native hyaline cartilage without requiring actual cartilage cell regeneration, thus solving the durability and property loss problem.
2Reliability
If an implant is used to repair articular cartilage defects, then functional life and comfort are improved, but the implant requires complex shaping to match the native cartilage contour
Solution Approach 1:
The system performs preliminary action by preparing the recipient site through excision of damaged tissue and creation of a precisely shaped cavity that matches the desired implant geometry. By pre-shaping the bone cavity to match the implant, the system eliminates the need for complex post-implantation shaping or customization, simplifying manufacturing while ensuring optimal fit and function.
3Reliability
If extensive cartilage removal is performed to create an implant site, then the implant can be securely anchored, but surgical trauma and healing time increase
Solution Approach 1:
The patent applies local quality by performing excision only in the specific defective area rather than removing large portions of healthy surrounding tissue. The excision is localized to the cartilage defect site, creating a precisely fitted recipient cavity that anchors the implant securely while preserving adjacent healthy cartilage and minimizing overall surgical trauma.
4Ease of manufacture
If the implant shape does not match the native articular surface, then manufacturing is simpler, but patient comfort and joint functionality are compromised
Solution Approach 1:
The system achieves universality by designing a standardized implant fabrication process that can accommodate various articular surface geometries through the excision preparation step. Rather than requiring custom-shaped implants for each patient, the universal approach allows a single implant design to be adapted to different anatomical configurations by modifying the excised cavity shape, thus maintaining manufacturing simplicity while ensuring patient-specific fit and comfort.
Data Source
AI summary
The present disclosure provides systems and methods for repairing a defect on a portion of an articular surface of a human body, particularly of the glenoid. More particularly, the present disclosure provides systems and methods for repairing both a glenoid cavity and a glenoid rim of the glenoid using a single implant.