Rotatable Saw Guide with Locking Feature for Osteotomy Precision
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Solution Overview
Problem
Current bone cutting tools for Tibial Plateau Leveling Osteotomies lack precision in locating curvilinear cuts, leading to potential inaccuracies and complications during the procedure.
Innovation Solution
A jig and saw guide system with a rotatable saw guide and locking feature, allowing for precise alignment and adjustment to match the desired curvilinear cut path on the tibia, enabling precise alignment of the saw guide relative to the bone's longitudinal axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a traditional bone cutting tool is used, then the procedure can be performed with simpler equipment, but the precision in locating curvilinear cuts is insufficient
Solution Approach 1:
The device is divided into separate functional components: a jig body with arms for positioning, a rotatable saw guide for defining the cut path, and a locking mechanism for securing the configuration. This segmentation allows each component to be optimized for its specific function while maintaining overall system precision.
Solution Approach 2:
The saw guide is designed to be rotatable relative to the jig body, allowing dynamic adjustment to match the desired curvilinear cut path. This dynamic capability enables precise alignment with the bone's anatomy while the locking feature stabilizes the configuration during the cutting procedure.
2Adaptability or versatility
If the saw guide is fixed in position, then the alignment is stable, but the ability to adjust to the desired curvilinear cut path is limited
Solution Approach 1:
The saw guide incorporates a rotatable joint that allows it to be dynamically adjusted to different angular positions to match the desired curvilinear cut path. The locking feature then secures the guide in the selected position, providing stability during the cutting operation.
Solution Approach 2:
The locking feature is designed to be manually operable by the surgeon, allowing the guide to be self-adjusted and self-secured without requiring additional tools or assistance. The surgeon can directly manipulate the locking mechanism to fix the saw guide in the desired position.
Data Source
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Figure 5A~5B
AI summary
An apparatus for locating a curvilinear cut in a bone comprises a jig body (102) and a first arm (104), a top end of which is rotatably coupleable to a first portion of the jig body in combination with a second arm (104), a top end of which is rotatably coupleable to a second portion of the jig body separated from the first portion and a saw guide (106) rotatably coupleable to the first arm, the saw guide including a bottom surface extending along a curve corresponding to a desired path through which a bone is to be cut, the saw guide including a locking feature (such as slots 208, 208', 208'') receiving a bone fixation element (such as a bone pin 20) which, in an operative configuration, is mounted in the bone to align the saw guide relative to the arm so that an operator may precisely align a desired axis of the saw guide with a longitudinal axis of the first arm. The jig body includes an orientation feature formed flush to a surface (114) which is perpendicular to the plane in which the arms extend. The orientation feature is an opening or openings (112) in this surface that can be used for alignment of the apparatus to the bone.