Angled Bone Cut Guide for Precise Hallux Valgus Osteotomy
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Solution Overview
Problem
Existing methods for correcting hallux valgus deformity, such as chevron osteotomy, lack effective tools for precise bone cutting and fixation, 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 to facilitate precise bone cutting and secure fixation of bone portions using wires and screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional chevron osteotomy methods are used without specialized guiding tools, then the surgical procedure can be performed with basic instruments, but the precision of bone cutting and alignment of bone portions deteriorates
Solution Approach 1:
The cut guide is prepared in advance with pre-configured apertures and holes that define the exact cutting trajectory and bone portion alignment. The guide is positioned on the bone surface before cutting begins, allowing the surgeon to follow pre-planned paths rather than relying on intraoperative judgment alone. This preliminary preparation ensures precise bone cutting and alignment while keeping the actual cutting procedure straightforward.
Solution Approach 2:
The cut guide serves as an intermediary tool between the surgeon's intent and the actual bone cutting process. It translates the desired cutting trajectory into physical guidance through its apertures and holes, mediating the interaction between surgical intent and execution. The guide's geometric features (apertures, holes, projections) act as intermediaries that ensure accurate bone portion separation and alignment without requiring complex surgical techniques.
2Stability of the object's composition
If bone portions are secured using conventional fixation methods, then the procedure can be completed with standard fixation tools, but the stability and accuracy of bone portion positioning deteriorates
Solution Approach 1:
The cut guide is positioned and secured to the bone surface before the cutting operation begins. The projections on the guide engage with the bone to establish a stable reference framework in advance. This preliminary positioning ensures that when bone portions are later aligned and fixed, the guide maintains accurate spatial relationships, leading to stable bone portion positioning throughout the procedure.
Solution Approach 2:
The cut guide acts as an intermediary reference structure during bone portion alignment and fixation. Its geometric features (apertures, holes, projections) mediate the positioning process by providing physical references that ensure accurate alignment. The guide translates the desired final position of bone portions into intermediate positioning cues during the fixation process, improving both stability and ease of operation.
3Measurement precision
If precise bone cutting and alignment tools are used, then surgical accuracy improves, but the number of components and device complexity increases
Solution Approach 1:
The cut guide is divided into distinct functional segments: apertures for cutting trajectory guidance, holes for bone portion alignment, and projections for securing the guide to the bone surface. Each segment performs a specific function, allowing the overall device to achieve high precision through modular functional decomposition rather than through monolithic complexity. This segmentation enables accurate bone cutting and alignment while keeping the guide's structure manageable and purpose-driven.
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.