Revision Glenoid Component Modularity for Precise Bone-Sparing Alignment
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Solution Overview
Problem
Existing glenoid components in shoulder arthroplasty procedures face challenges with loosening and require complex customization or grafting due to glenoid deficiencies, leading to increased costs and difficulty in achieving reproducible results.
Innovation Solution
A modular glenoid component system with a base and articulating component, aligned using an inferior glenoid circle center, allowing for precise implantation and reduced bone removal, even in cases of severe deficiencies, using a guide pin and reaming/planning tools to ensure proper alignment and fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional glenoid components are used in revision procedures, then the surgical complexity increases due to the need for customization or grafting, but the reliability of achieving reproducible results decreases
Solution Approach 1:
The guide pin system provides universal functionality for multiple tasks: establishing the inferior glenoid circle center, defining the glenoid axis, guiding reaming depth, and ensuring proper component alignment. This single device performs what previously required multiple specialized instruments and complex grafting procedures, thereby reducing surgical complexity while maintaining reproducibility
Solution Approach 2:
The guide pin is inserted beforehand to pre-establish the critical anatomical landmarks (inferior glenoid circle center and glenoid axis) before any bone removal or component implantation occurs. This preliminary action ensures that subsequent steps follow a predetermined, reproducible path, eliminating the need for complex intraoperative decision-making or customization
2Adaptability or versatility
If more bone is removed to accommodate glenoid deficiencies, then the adaptability to severe deficiencies improves, but the loss of substance increases
Solution Approach 1:
The guide pin acts as an intermediary that transfers the anatomical information from the inferior glenoid circle center to the reaming process. By using the guide pin as a reference, the surgeon can precisely control the amount and location of bone removal, adapting to deficiencies without excessive bone loss. The guide pin mediates between the anatomical variability and the standardized reaming procedure
Solution Approach 2:
The reaming process is localized and controlled by the guide pin, allowing bone removal only where necessary to accommodate the specific glenoid deficiencies. The guide pin defines the exact zone of intervention, ensuring that bone removal is minimal and precisely targeted rather than extensive and generalized
3Adaptability or versatility
If complex customization procedures are performed, then the adaptability to individual cases improves, but the loss of time increases
Solution Approach 1:
The guide pin system is self-aligning and self-defining, requiring minimal surgeon intervention to establish the critical reference points. Once the guide pin is inserted, it automatically provides all necessary guidance for subsequent steps, eliminating the need for time-consuming measurements, markings, and adjustments that would otherwise be required for customization
Data Source
AI summary
A glenoid component in one embodiment includes a base component with a planar upper circular rim defining a first plane, a receptacle opening to the first plane, and a lower planar circular surface defining a second plane parallel to the first plane. An articulating component of the glenoid component includes an upper articulating surface, a lower cylindrical coupling portion configured to be inserted into the receptacle, and an overhang portion located above the lower cylindrical coupling portion and beneath the upper articulating surface. The overhang portion includes a planar lower surface extending outwardly from the lower cylindrical coupling portion and configured to abut the planar upper circular rim of the base component when the articulating component is coupled to the base component.