Angled Cut Guide and Targeting Holes for Hallux Valgus Osteotomy
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Solution Overview
Problem
Existing methods for correcting hallux valgus deformity, such as chevron osteotomy, lack effective guides for precise bone cutting and wire placement, leading to challenges in 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 for precise wire placement, ensuring accurate bone separation and fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional chevron osteotomy methods are used without specialized guides, then the surgical procedure can be performed with simpler tools, but the precision of bone cutting and wire placement deteriorates
Solution Approach 1:
The surgical guide system is divided into separate functional components: a positioning element with apertures for bone cutting guidance, and a targeting guide with holes for wire placement. This segmentation allows each component to be optimized for its specific function while maintaining overall system precision without excessive complexity.
Solution Approach 2:
The surgical guides are designed to be positioned and secured on the bone surface before the actual cutting and wire placement procedures. The positioning elements engage with pre-marked anatomical landmarks, establishing precise reference frames in advance that guide all subsequent surgical actions, ensuring accuracy without requiring complex real-time adjustments.
2Reliability
If bone screws or plates are used for fixation after osteotomy, then the bone portions can be secured in position, but the complexity of the fixation procedure increases
Solution Approach 1:
K-wires are used as intermediary fixation devices to temporarily secure the bone portions in the desired position after osteotomy. These wires provide reliable stabilization during the healing process and can be removed later, offering a simpler alternative to permanent bone screws or plates while maintaining fixation stability.
Solution Approach 2:
The surgical guides themselves are designed as disposable, single-use instruments that are discarded after a single procedure. This eliminates the need for complex sterilization and storage infrastructure, reducing hospital resource complexity while maintaining high precision for each individual surgical case.
3Stability of the object's composition
If multiple wires are inserted at angled orientations for guide positioning, then the guide can be securely positioned on the bone, but the difficulty of wire insertion increases
Solution Approach 1:
The targeting guide incorporates multiple holes with different orientations and positions, each specifically designed for inserting wires at particular angles required for stable guide positioning. This local differentiation of hole configurations allows wires to be inserted at optimal angles for each specific anatomical location, achieving stable guide fixation while maintaining ease of wire insertion through pre-planned access paths.
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.