Glenoid Component Bearing Surface Geometry Optimization
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Solution Overview
Problem
Glenoid components for shoulder prostheses often fail to securely attach to the socket due to mismatched dimensions, leading to wear and mechanical alterations, resulting in unsatisfactory articular performance.
Innovation Solution
A set of glenoid components with varying sizes and bearing surface geometries, including different radii of curvature, allowing surgeons to select the best match for each patient's socket, thereby improving mechanical durability and reducing bone preparation needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If glenoid components with identical bearing surfaces are used across different sizes, then manufacturing is simplified, but the attachment durability to the socket deteriorates due to dimensional mismatch
Solution Approach 1:
The patent applies local quality by differentiating the bearing surface geometry only where it contacts the socket, while keeping the joint surface and overall component structure standardized. This allows customized bearing surfaces (with varying radii of curvature) for different socket geometries without requiring complete redesign of each component size, thus maintaining manufacturing efficiency while improving attachment durability.
Solution Approach 2:
The patent implements parameter changes by varying the radius of curvature of the bearing surface across different component sizes. Instead of using identical bearing surfaces for all sizes, each size category has optimized bearing surface parameters (radius of curvature) that match typical socket geometries, thereby improving attachment reliability while maintaining a limited set of standardized designs.
2Device complexity
If glenoid components with standardized bearing surfaces are used, then device complexity is reduced, but mechanical durability deteriorates due to wear and interface alteration
Solution Approach 1:
The patent changes the geometric parameters of the bearing surface, specifically the radius of curvature, to create multiple standardized configurations. This provides enhanced mechanical durability through better socket matching without requiring excessive component variety, as the changes are limited to specific geometric parameters rather than complete redesigns.
Solution Approach 2:
The patent achieves universality by creating a family of bearing surface designs that can serve multiple size categories. Each bearing surface geometry is designed to be universally applicable within its size category, providing durable attachment across different patient anatomies without requiring unique custom designs for each case.
3Quantity of substance
If glenoid components with single bearing surface geometry are used, then the number of components is minimized, but adaptability to different patient anatomy deteriorates
Solution Approach 1:
The patent applies local quality by differentiating bearing surface geometry to match different socket anatomies while keeping the overall component structure and joint surface standardized. This provides anatomical adaptability through localized geometric variations without requiring complete customization of each component.
Solution Approach 2:
The patent implements adaptability through parameter changes in the bearing surface radius of curvature, creating a limited set of standardized geometries that can accommodate different patient anatomies. This provides versatility without requiring an excessive number of component variants.
Data Source
AI summary
A set of glenoid components a first glenoid component of a first type and of a first size and a second glenoid component of a second type and of the first size. The first glenoid component includes a first body including a first joint surface and a first bearing surface disposed oppose the first joint surface. The first joint surface has a first dimension. A first anchor extends from a central region of the first bearing surface. The second glenoid component includes a second body including a second joint surface and a second bearing surface disposed opposite the second joint surface. The second joint surface having a second dimension that is the same as the first dimension. A second anchor extends from a central region of the second bearing surface.