Angled Cut And Targeting Guides for Hallux Valgus Osteotomy
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Solution Overview
Problem
Existing methods for correcting hallux valgus deformity, such as chevron osteotomy, lack effective surgical guides for precise bone cutting and fixation, leading to challenges in aligning and securing bone portions post-surgery.
Innovation Solution
The use of a cut guide with angled apertures and holes for guiding surgical tools and a targeting guide with projections and targeting holes to facilitate precise bone cutting and secure fixation of bone portions, ensuring accurate alignment and stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional chevron osteotomy is performed without surgical guides, then the surgical procedure can be completed, but the precision of bone cutting and alignment of bone portions deteriorates
Solution Approach 1:
The surgical guide is divided into two separate components: a cut guide with apertures for guiding the osteotomy cut, and a targeting guide with holes for positioning fixation screws. This segmentation allows each guide to be optimized for its specific function, improving precision while keeping individual guides relatively simple in structure.
Solution Approach 2:
The surgical guides are designed to be positioned and secured on the bone surface before the actual cutting and fixation operations. The cut guide is positioned first to establish the osteotomy cut, followed by the targeting guide for screw placement. This preliminary positioning ensures that subsequent operations follow precise predetermined paths, achieving high manufacturing precision without requiring complex real-time control systems.
2Measurement precision
If surgical guides with multiple apertures and holes are used, then bone cutting precision and fixation accuracy are improved, but the device complexity increases
Solution Approach 1:
Each surgical guide is designed to perform multiple functions within its component structure. The cut guide not only guides the osteotomy cut through its apertures but also provides positioning features for secure placement on the bone. The targeting guide similarly provides both alignment guidance for screws and positioning capabilities. This multi-functionality reduces the need for additional separate positioning devices, managing overall complexity while maintaining high measurement precision.
Solution Approach 2:
The surgical guides act as intermediary tools between the surgeon and the bone, translating surgical intent into precise physical actions. The apertures and holes in the guides serve as intermediaries that define exact cut paths and screw trajectories without requiring the surgeon to directly measure or calculate these parameters, thereby achieving high alignment accuracy while simplifying the surgical操作流程.
3Stability of the object's composition
If bone portions are separated and repositioned without precise guidance, then the surgical procedure can be completed, but the alignment and stabilization of bone portions deteriorates
Solution Approach 1:
The targeting guide is positioned on the repositioned bone portions before fixation screw insertion. This guide pre-establishes the exact trajectories for screw placement, ensuring that screws will pass through both bone portions at the correct angles and positions. By performing this guidance setup beforehand, the actual fixation operation becomes straightforward, achieving stable bone portion composition while maintaining ease of operation.
Solution Approach 2:
The surgical guides replace complex manual alignment procedures with predetermined mechanical pathways. Instead of requiring the surgeon to manually align bone portions and calculate screw trajectories, the guides provide pre-formed apertures and holes that mechanically define the correct positions and angles. This substitution transforms a difficult manual alignment task into a simple insertion operation, improving both stabilization and ease of operation.
Data Source
AI summary
A cut guide includes a first face and an opposed second face. The cut guide further includes a first aperture and a second aperture extending through the cut guide from the first face to the second face. The first and second apertures are configured to guide a surgical tool in cutting a bone. The cut guide further includes a first hole extending through the cut guide from the first face to the second face. The cut guide further includes a second hole extending through the cut guide. A central axis of the second hole is oriented at an acute angle to the second face. The first and second holes are configured to receive a wire to position the guide against the bone.