Tibial Cutting Block Anchoring Pin Holes Alignment
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Solution Overview
Problem
Current surgical tools for knee arthroplasty, particularly for tibial resurfacing, are complex and require multiple adjustments, making them difficult to use and costly, with a high risk of errors during precise bone cuts.
Innovation Solution
A tibia cutting block with a simple, cuboid shape and minimal components, featuring anchoring pin holes at an angle to secure the block to the tibia, a reference pin guide for precise alignment, and a cutting guide slot for accurate cuts, designed for minimal invasive surgery with reduced settings and adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex instruments with multiple adjustment mechanisms are used for tibial cutting, then positioning accuracy can be achieved, but device complexity and cost increase significantly
Solution Approach 1:
The cutting block is divided into functional segments: a base body for stability, anchoring pin holes for secure attachment, a reference pin guide for alignment, and a cutting guide slot for precise blade direction. Each segment performs a specific function, eliminating the need for complex adjustment mechanisms while maintaining cutting precision.
Solution Approach 2:
The cutting block incorporates pre-defined geometric features (anchoring pin holes at specific angles, reference pin guide orientation, cutting guide slot angle) that are prepared in advance during manufacturing. These pre-configured elements eliminate the need for intraoperative adjustments, reducing device complexity while ensuring accurate positioning and cutting angles.
2Adaptability or versatility
If multiple adjustment settings are provided to find correct cut position, then positioning flexibility is improved, but the risk of operational errors increases
Solution Approach 1:
The cutting block incorporates localized geometric features with specific properties: anchoring pin holes positioned at predetermined angles (10-30 degrees) for stable attachment, a reference pin guide with specific orientation for accurate alignment, and a cutting guide slot at a predetermined angle for precise cutting direction. These locally optimized features provide positioning flexibility without requiring multiple adjustable settings, thereby reducing operational error risk.
3Ease of operation
If simple tool design is used for minimal invasive surgery, then ease of use and reduced maintenance cost are achieved, but cutting precision may be compromised
Solution Approach 1:
The cutting block incorporates pre-defined geometric features (anchoring pin holes at specific angles, reference pin guide orientation, cutting guide slot angle) that are prepared in advance during manufacturing. These pre-configured elements eliminate the need for complex intraoperative adjustments, reducing device complexity while ensuring accurate positioning and cutting angles.
Solution Approach 2:
The cutting block is designed to self-align and self-position through its geometric features: the anchoring pin holes automatically orient the block correctly when pins are inserted, the reference pin guide inherently provides alignment reference, and the cutting guide slot automatically directs the blade at the correct angle. This self-positioning capability achieves cutting precision without complex adjustment mechanisms, maintaining ease of use for minimal invasive surgery.
Data Source
AI summary
A tibia cutting block for performing precise cuts into a tibia comprises an approximately cuboid body with a tibia attachment side and opposing thereto a front side. The body has a cutting guide slot extending from a top side into the body, a blade holding slot extending from a right side or a left side into the body, a first anchoring pin hole which is close to the intersection of a first plane defined by the blade holding slot and a second plane defined by the a cutting guide slot, a second anchoring pin hole distant from the first anchoring pin hole and a reference pin guide. All are penetrating the body from the front side to the tibia attachment side.