Bone Cutting Guide Positioning Device with Adjustable Contact Members
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Solution Overview
Problem
Existing positioning devices for cutting guides in orthopedic surgery require a base element to be fixed to the bone, leading to invasive procedures, unnecessary bone damage, and increased surgical time, as they occupy significant space and are cumbersome.
Innovation Solution
A positioning device for cutting guides that uses contact members with one degree of freedom connections to directly contact the bone, allowing for precise adjustment without a fixed base, and includes a system for determining and displaying the optimal position of the cutting guide relative to the bone.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a base element is fixed to the bone using existing positioning devices, then the cutting guide can be positioned relative to the bone, but the procedure becomes invasive and causes unnecessary bone damage
Solution Approach 1:
The invention extracts and eliminates the base element that was previously required to be fixed to the bone. The positioning device now consists only of contact members that freely contact the bone surface without fixation, removing the source of bone damage while maintaining positioning capability through direct bone contact and adjustment mechanisms
Solution Approach 2:
The positioning device is segmented into multiple independent contact members (at least two) that can individually adjust their positions. This segmentation allows the device to adapt to the bone surface geometry and achieve stable positioning without requiring a fixed base, thereby avoiding bone damage while maintaining reliability
2Adaptability or versatility
If a base element and multiple positioning elements are used to position the cutting guide, then the cutting guide can be adjusted in angle and position, but the device occupies considerable space and becomes cumbersome
Solution Approach 1:
The invention merges the functions of the base element and positioning elements into a single integrated structure where the contact members directly serve as both the positioning interface and the adjustment mechanism. This eliminates the need for separate base components and reduces the overall device volume while maintaining full positioning and adjustment capability
Solution Approach 2:
Instead of having a large base fixed to the bone with positioning elements extending from it, the invention inverts the approach by having small contact members that directly contact the bone and adjust independently. The cutting guide is then positioned relative to these contact members, reversing the traditional hierarchy and significantly reducing device size
3Reliability
If a base element is first fixed to the bone, then the cutting guide can be positioned, but the installation time increases
Solution Approach 1:
The contact members are pre-configured with adjustment mechanisms that allow for quick positioning and locking. The device is designed to be placed on the bone in a preliminary position and then rapidly adjusted to the correct orientation using the adjustment means, eliminating the time-consuming base fixation process while maintaining positioning stability
Solution Approach 2:
The positioning device incorporates dynamic adjustment capabilities through the adjustment means that allow the contact members to be individually varied in position. This dynamic system enables rapid adaptation to the required cutting plane orientation without the need for time-consuming base fixation and subsequent adjustments
Data Source
AI summary
A device for positioning a cutting guide with respect to a bone comprising a body forming the cutting guide or intended to be fixed to the cutting guide; a least two contact members intended to freely contact the bone; and adjustment means for individually varying the relative position of the body with respect to each contact member.