Mandrel Positioning Mark for Implant Alignment
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Solution Overview
Problem
Current surgical tools for implanting cartilage replacements in joints lack precision and user-friendliness, leading to potential misplacement of implants, increased wear on joints, and longer recovery times for patients.
Innovation Solution
A mandrel design with specific elements and positioning marks that allow for rotational positioning relative to anatomical directions, implant features, and recess markings, ensuring precise alignment and insertion of implants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional surgical tools are used for implant insertion, then the surgical procedure can be completed, but the implant positioning precision is insufficient leading to potential misplacement
Solution Approach 1:
The mandrel is divided into multiple functional segments: a positioning element for alignment, a contacting surface for force application, and a grip portion for surgeon control. This segmentation allows each part to perform its specific function optimally while keeping the overall design manageable and not excessively complex.
2Stability of the object's composition
If the mandrel contacting surface is made large to ensure stable contact with the implant, then insertion stability improves, but the mandrel becomes harder to grip and control precisely
Solution Approach 1:
The mandrel is segmented into a contacting surface portion and a grip portion with distinct functions and dimensions. The contacting surface is sized appropriately for stable implant contact, while the grip portion extends beyond to provide adequate leverage and control for the surgeon, resolving the trade-off between stability and operability.
3Extent of automation
If the surgeon relies on skill and experience for precise implant placement, then no additional positioning features are needed, but the procedure is highly surgeon-dependent and harder to standardize
Solution Approach 1:
The mandrel incorporates pre-designed positioning elements and contacting surfaces that are configured in advance to guide the implant to the correct position and orientation. This preliminary configuration of the tool itself automates the positioning function, reducing reliance on surgeon skill while maintaining simplicity through purposeful geometric design rather than complex mechanisms.
Data Source
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AI summary
The present invention relates to a method for designing a mandrel (35) for hammering, pressing and/or pushing an implant (10) into position in a recess made in a joint, comprising providing said mandrel with at least one element and/or positioning mark (37) adapted to be used for determining the rotational orientation of the mandrel in relation to the implant. A contacting surface (38) of the mandrel to be in contact with an articulate surface (15) of the implant may be designed to have an inverted surface to the curvature of the articulate surface of the implant to be inserted in the recess using the mandrel.