Modular Glenoid Component with Angled Concave Surface
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Solution Overview
Problem
Current shoulder replacement prosthetics require complex procedures and extensive equipment for revisions, particularly when transitioning from traditional anatomic total shoulder replacement to reverse total shoulder replacement, due to issues like anterior instability which necessitate changes in component version and bone removal.
Innovation Solution
A modular glenoid component with an angled concave top surface and adjustable features, such as a plug and protrusions, allows for easy exchange between traditional and reverse shoulder configurations without compromising long-term security and function, using a baseplate that can accept either type of glenoid component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional anatomic total shoulder replacement is performed, then the rotator cuff function is preserved, but anterior instability may occur requiring complex revision procedures
Solution Approach 1:
The glenoid component is divided into modular segments including a baseplate, glenoid body, and acetabular cup that can be independently selected and assembled. This modularity allows surgeons to customize the component configuration to address anterior instability without requiring complete removal and replacement of all components, thereby reducing revision procedure complexity while maintaining rotator cuff function.
Solution Approach 2:
The glenoid component incorporates adjustable features including a movable acetabular cup that can be positioned at different angles and a baseplate with variable thickness options. These dynamic adjustment capabilities enable real-time optimization of component positioning during surgery to prevent anterior instability while preserving rotator cuff integrity, eliminating the need for complex multi-step revision procedures.
2Reliability
If component version is changed to address anterior instability, then stability is improved, but bone removal requirements increase
Solution Approach 1:
The baseplate incorporates adjustable thickness parameters and angular orientations that can be modified during implantation. By changing these geometric parameters, the component can achieve the necessary retroversion angle for stability without requiring increased bone removal. The acetabular cup can also be positioned at variable angles to optimize stability while preserving glenoid bone stock.
3Adaptability or versatility
If a modular system is used, then surgical flexibility is improved, but device complexity increases
Solution Approach 1:
The baseplate is designed as a universal component that can accommodate multiple glenoid body configurations and acetabular cup orientations through standardized attachment interfaces. This multi-functionality allows a single baseplate design to support various surgical scenarios including traditional anatomic replacement and revisions for anterior instability, providing surgical flexibility without proportionally increasing device complexity.
Solution Approach 2:
The modular system employs a nested configuration where the acetabular cup fits within the glenoid body, which in turn attaches to the baseplate. This nested arrangement allows compact storage and simplified assembly of multiple component options, reducing the practical complexity of managing numerous individual components while maintaining extensive surgical flexibility.
Data Source
AI summary
A modular glenoid component with an angled concave top surface for use with or as part of a modular shoulder prosthesis system that provides flexibility in shoulder replacements and ability to switch between a traditional anatomic Total Shoulder Replacement (ta-TSR) to a reverse Total Shoulder Replacement (r-TSR). The module glenoid component includes a base having the concave top surface angled from an anterior side to a posterior side such that the anterior side is higher than the posterior side. Optionally, the modular glenoid component includes a plug and/or a peripheral flange both of which when present extend in a direction away from a bottom surface of the base.