Multi-Radius Acetabular Impactor Head for Hip Implant Seating
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Solution Overview
Problem
The existing surgical kits for hip arthroplasty require multiple inserter-impactor tools for different sizes of acetabular implants, leading to increased logistical costs, clutter in the operating theater, and a higher risk of infection due to the need for numerous instruments.
Innovation Solution
A multi-size inserter-impactor tool with a head featuring multiple convex profiles of different radii of curvature, allowing it to engage and properly seat various sizes of acetabular liners or shells, reducing the need for multiple tools by using a single instrument for multiple implant sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple inserter-impactor tools are used for different sizes of acetabular implants, then proper seating and orientation of each implant size is ensured, but the number of instruments increases leading to higher logistical costs, more clutter in the operating theater, and increased infection risk
Solution Approach 1:
The inserter-impactor tool is designed with a head that includes multiple convex profiles of different radii of curvature, allowing a single tool to engage and properly seat acetabular liners or shells of various sizes. Each convex profile corresponds to a specific concave profile on different implant sizes, enabling one instrument to perform multiple functions across different implant sizes.
Solution Approach 2:
The head of the inserter-impactor tool is segmented into multiple convex profiles, where each profile is configured to engage with a specific concave profile on different acetabular liners or shells. This segmentation allows the single tool to differentiate between various implant sizes through its multiple specialized contact surfaces.
2Manufacturing precision
If multiple inserter-impactor tools are included in the surgical kit, then each implant size can be properly seated, but logistical costs increase and the operating theater becomes more cluttered
Solution Approach 1:
The inserter-impactor tool is designed with a head that includes multiple convex profiles of different radii of curvature, allowing a single tool to engage and properly seat acetabular liners or shells of various sizes. Each convex profile corresponds to a specific concave profile on different implant sizes, enabling one instrument to perform multiple functions across different implant sizes.
3Manufacturing precision
If multiple inserter-impactor tools are used, then proper seating of different implant sizes is achieved, but the risk of infection increases due to the need for numerous instruments
Solution Approach 1:
The inserter-impactor tool is designed with a head that includes multiple convex profiles of different radii of curvature, allowing a single tool to engage and properly seat acetabular liners or shells of various sizes. Each convex profile corresponds to a specific concave profile on different implant sizes, enabling one instrument to perform multiple functions across different implant sizes.
Data Source
AI summary
An acetabular implant kit includes a first acetabular component that has an inner surface that defines a first concave profile. A second acetabular component includes an inner surface that defines a second concave profile. An instrument includes an elongated body that has a first end and a second end. A head is connected to the second end of the body and has an engagement surface. The engagement surface includes a first convex profile and a second convex profile. The first and second convex profiles are arranged along a longitudinal axis of the head and have a first radius of curvature configured to congruently engage the first concave profile of the first acetabular component. The second convex profile has a second radius of curvature configure to congruently engage the second concave profile of the second acetabular component. The first radius of curvature is different than the second radius of curvature.