Segmented Impactor Head for Tibial Implant Stability
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Solution Overview
Problem
Current surgical instruments lack the ability to effectively stabilize various sizes of tibial implant components during orthopaedic arthroplasty procedures, leading to instability and potential complications during impaction.
Innovation Solution
A surgical instrument with an impactor head featuring spaced impaction surfaces and an anterior wall extension, designed to accommodate posterior-stabilizing spines of different-sized tibial implant components, providing multiple stable contact points to ensure secure impaction across a range of sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single impaction surface is used, then the instrument structure is simple, but it cannot provide stable impaction for various sizes of tibial implant components
Solution Approach 1:
The impaction surface is divided into multiple spaced-apart sections (first impaction surface section, second impaction surface section, etc.), each configured to contact different portions of tibial implant components of various sizes. This segmentation allows the single impaction surface to adapt to multiple implant sizes while maintaining structural integrity and providing stable impaction for each size category.
2Adaptability or versatility
If the impaction surface is made compliant to fit different sizes, then adaptability improves, but the stability and precision of impaction may be compromised
Solution Approach 1:
Each section of the impaction surface is configured with specific local characteristics matched to particular implant sizes. The first impaction surface section has a first configuration for first-sized implants, while the second impaction surface section has a second configuration for second-sized implants. This local quality differentiation ensures that each section provides optimal stability and precision for its target implant size while the overall structure maintains adaptability across sizes.
Data Source
AI summary
A surgical instrument for use in an orthopaedic arthroplasty procedure includes a shaft having a first end and a second end and an impactor head disposed at the second end of the shaft. The impactor head includes first and second spaced ends, two spaced impaction surfaces disposed at the second end, and a cavity disposed between the impaction surfaces. The cavity is adapted to accommodate posterior-stabilizing spines of at least a first tibial implant component and a second tibial implant component having a size different than a size of the first tibial implant component. Each of the impaction surfaces includes a first section with a contour that conforms to a contour of a bearing surface of the first tibial implant component and a second section with a contour that conforms to a contour of a bearing surface of the second tibial implant component.