Hemispherical Reamer with Segmented Metallic and Polymeric Driver
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Solution Overview
Problem
Current orthopaedic surgical instruments used in joint arthroplasty procedures are generic and lack specificity, leading to inefficiencies in joint replacement surgeries, as they are not tailored to individual patient needs.
Innovation Solution
An orthopaedic surgical instrument assembly featuring a hemispherical component with cutting teeth and a driver component, where the hemispherical component is formed from metallic material with a convex outer surface and a concave inner surface, and the driver component is polymeric, allowing for precise engagement with the patient's acetabulum and efficient reaming of bone tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If generic orthopaedic surgical instruments are used, then device complexity is reduced and ease of manufacture is improved, but manufacturing precision and adaptability to individual patient needs deteriorate
Solution Approach 1:
The instrument is divided into two distinct components: a reusable metallic hemispherical component and a disposable polymeric driver component. This segmentation allows the metallic component to be manufactured with high precision for reusability, while the polymeric driver can be mass-produced more simply and disposed of after use, resolving the contradiction between manufacturing precision and ease of manufacture.
Solution Approach 2:
Different parts of the instrument have different material qualities and manufacturing requirements. The hemispherical component requiring high precision has metallic material properties, while the driver component requiring simpler manufacturing has polymeric material properties. This local differentiation of quality allows each component to be optimized for its specific manufacturing needs.
2Adaptability or versatility
If generic orthopaedic surgical instruments are used, then device complexity is reduced, but adaptability to individual patient needs and surgical precision deteriorate
Solution Approach 1:
The instrument design allows for dynamic adaptation through the combination of reusable metallic components that can be selected based on patient-specific requirements and disposable polymeric drivers that ensure consistent, precise engagement. This dynamic configuration enables adaptability without requiring each complete instrument to be individually customized, thus managing complexity.
3Productivity
If reusable metallic components are used, then durability and surgical efficiency are improved, but cost and device complexity increase
Solution Approach 1:
By segmenting the instrument into reusable metallic and disposable polymeric components, the system allows the metallic part to be used across multiple surgeries (improving productivity), while the simpler polymeric drivers can be easily replaced. This segmentation manages the complexity-cost tradeoff by making only the necessary components reusable.
Data Source
AI summary
A surgical instrument assembly includes a metallic hemispherical component and a driver component removably coupled to the hemispherical component. The metallic hemispherical component has a convex outer surface configured to engage a patient's natural acetabulum, a concave inner surface positioned opposite the outer surface and defining a cavity in the hemispherical component, a plurality of cutting teeth extending outwardly from the outer surface, and a plurality of apertures defined in the inner surface. The driver component has a shank and a plurality of ribs secured to, and extending outwardly from, the shank. Each rib has a tab that is received in a corresponding aperture of the hemispherical component to secure the driver component to the hemispherical component.