Hemispherical Acetabulum Reamer with Curved Cutting Teeth
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Solution Overview
Problem
Current orthopaedic surgical instruments used for joint arthroplasty procedures, such as hip arthroplasty, lack specificity and reusability, leading to inefficiencies and potential complications during the reaming process of a patient's acetabulum.
Innovation Solution
A surgical instrument assembly featuring a hemispherical component with a convex outer surface and a plurality of cutting teeth, designed for engagement with a patient's natural acetabulum, combined with a driver component for rotational power transmission, allowing for precise reaming and reusability of the instrument.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If generic orthopaedic surgical instruments are used for multiple patients, then instrument versatility is improved, but manufacturing precision and cutting uniformity deteriorate
Solution Approach 1:
The cutting teeth are positioned at specific locations on the hemispherical component's outer surface, with each tooth having a predetermined position relative to the apex point. This localized precision positioning ensures uniform cutting patterns while maintaining the overall instrument design for repeated use across multiple patients.
2Manufacturing precision
If cutting teeth are positioned on arced imaginary lines, then cutting uniformity is improved, but device complexity increases
Solution Approach 1:
The cutting teeth are arranged on arced imaginary lines that extend outwardly from the apex point of the hemispherical component. This curved arrangement follows the spherical geometry of the component, creating uniform cutting patterns through rotational engagement with the acetabulum while maintaining a relatively simple hemispherical structure.
3Productivity
If multiple cutting teeth are positioned on the same arced imaginary line, then cutting efficiency is improved, but ease of operation deteriorates due to tooth spacing requirements
Solution Approach 1:
The cutting teeth are asymmetrically distributed across multiple arced imaginary lines radiating from the apex point. While multiple teeth are positioned on each arced line to improve cutting efficiency, the asymmetric arrangement across different arcs ensures proper spacing and distribution, preventing overcrowding and maintaining ease of operation through balanced geometry.
Data Source
AI summary
An orthopaedic surgical instrument assembly includes a hemispherical component having a convex outer surface extending from a circular rim to an apex point, and a plurality of cutting teeth extending outwardly from the outer surface between the circular rim and the apex point. Each cutting tooth of the plurality of cutting teeth includes an elongated cutting edge that is positioned on an arced imaginary line of a plurality of arced imaginary lines extending outwardly from the apex point of the hemispherical component. A method of manufacturing an orthopaedic surgical instrument assembly is also disclosed.