Glenoid Assembly Peg Alignment via Base Flexion
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Solution Overview
Problem
Existing glenoid components with non-parallel oriented pegs face challenges in implantation due to misalignment with drilled bores, leading to unstable attachment and potential damage to soft tissues and muscles, and may result in early component failure and wear debris generation.
Innovation Solution
A glenoid assembly with non-parallel oriented pegs and a base component that can flex during implantation to align with bores, using stiffening members to enhance structural integrity and prevent deformation during use, ensuring proper anchoring and reducing wear debris.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-parallel oriented pegs are used to reach healthy bone stock, then anchoring effectiveness is improved, but alignment with drilled bores deteriorates
Solution Approach 1:
The pegs are pre-formed with non-parallel orientations that match the desired final positions in healthy bone stock. During implantation, the base component is temporarily deformed to align the pegs with drilled bores, then returns to its original configuration, achieving both proper alignment during surgery and optimal positioning in healthy bone.
Solution Approach 2:
The base component is designed with dynamic flexibility, allowing it to deform during implantation to facilitate peg alignment with bores, then maintain structural integrity during use. This dynamic behavior enables the transition from a flexible implantation state to a stable operational state.
2Ease of operation
If the base component is made flexible to enable peg alignment, then ease of implantation is improved, but structural integrity deteriorates
Solution Approach 1:
The base component exhibits dynamic properties, being flexible during implantation to allow peg alignment but maintaining sufficient structural integrity during normal use. This time-dependent behavior resolves the contradiction between ease of implantation and structural strength.
Solution Approach 2:
The mechanical properties of the base component are optimized to allow temporary deformation during implantation while maintaining overall structural integrity. Material selection and geometric design enable controlled parameter changes that facilitate surgery without compromising long-term strength.
3Ease of operation
If parallel oriented pegs are used for easy alignment, then ease of implantation is improved, but ability to reach healthy bone stock deteriorates
Solution Approach 1:
The pegs are pre-formed with non-parallel orientations that correspond to the optimal positions in healthy bone stock. The base component's temporary deformation during implantation enables these pre-configured non-parallel pegs to align with drilled bores, achieving both easy implantation and optimal bone stock engagement.
Data Source
AI summary
A method of implanting a glenoid assembly, includes forming a first bore in a glenoid region of a scapula and inserting a first peg of a glenoid component into the first bore. The method includes plastically deforming a first passageway within the first peg, while the first peg is inserted into the first bore, by inserting a first stiffening pin into the first passageway.