Bone Preparation Guide Assembly for Knee Surgery
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Solution Overview
Problem
Current techniques for preparing bone to receive a patello-femoral prosthetic implant lack effective guides for setting the position and depth of cuts, leading to inefficiencies and inaccuracies in knee replacement surgery.
Innovation Solution
A surgical instrumentation set and method that utilizes a bone preparation guide assembly with distinct slots and stabilizer pins to accurately position and ream the bone, allowing for precise cuts to be made using a cutting tool, ensuring proper alignment and depth control for the implant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hand sculpting using osteotomes or rasps is used to resect the femur, then the surgeon has flexibility in making cuts, but the position and depth of cuts cannot be accurately controlled without a guide
Solution Approach 1:
The patent introduces a bone preparation guide assembly as an intermediary tool between the surgeon and the bone. The guide assembly includes a guide body with multiple guide openings that direct cutting tools, ensuring precise position and depth control while maintaining surgical flexibility. The guide body acts as a mediator that translates surgical intent into accurate bone resection.
Solution Approach 2:
The guide assembly is positioned and secured to the bone surface before any cutting operations begin. This preliminary positioning establishes reference points and guide openings that predetermined the position and depth of subsequent cuts. The guide body is attached using stabilizer pins or other fixation methods prior to resection, ensuring all subsequent cutting actions are accurately guided.
2Ease of manufacture
If burring is used to prepare the bone, then the process can be performed without hand sculpting, but it is relatively time consuming and fails to provide guidance for cut depth and other parameters
Solution Approach 1:
The guide body is divided into multiple guide openings (first guide opening, second guide opening, etc.), each serving specific cutting functions. This segmentation allows multiple cutting operations to be performed through predetermined openings, eliminating the need for time-consuming burring while maintaining precision. Each guide opening is positioned to facilitate specific resection steps.
Solution Approach 2:
The bone preparation guide assembly serves multiple functions: it guides cutting tools for precise resection, provides depth control through guide openings, establishes position reference points, and can accommodate various cutting instruments. This multi-functionality eliminates the need for separate burring operations and hand sculpting, reducing overall preparation time while maintaining accuracy.
3Manufacturing precision
If multiple separate guides are used to establish cut position and depth, then accuracy can be improved, but the device complexity and number of components increases
Solution Approach 1:
The patent combines multiple guiding functions into a single integrated bone preparation guide assembly. The guide body incorporates multiple guide openings, position reference points, and stabilization features in one unified structure. This merging eliminates the need for multiple separate guide devices, reducing component count and surgical complexity while maintaining comprehensive precision control for all cutting operations.
Data Source
AI summary
A method for preparing bone to receive a prosthetic implant, according to an exemplary aspect of the present disclosure includes, among other things, positioning a bone preparation guide assembly on a bone, reaming the bone through a first cut opening of the bone preparation guide assembly, dividing the first cut opening into at least two distinct slots and making cuts in the bone through the at least two distinct slots.