Angled Bone Cutting Guide for Metatarsal Osteotomy Precision
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Solution Overview
Problem
Current surgical techniques for correcting bunion deformities, such as the Reverdin osteotomy, lack precision due to the absence of guides, leading to infrequent performance of this procedure and potential complications.
Innovation Solution
Development of bone cutting guides with angled reference surfaces and temporary fixation mechanisms that allow for precise alignment and cutting of metatarsal bones, enabling accurate realignment and stabilization during surgery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If freehand cutting is used for Reverdin osteotomy, then surgical flexibility is maintained, but cutting precision and alignment accuracy deteriorate
Solution Approach 1:
The guide is designed with pre-determined angular orientations (e.g., 30 degrees relative to the metatarsal shaft) and geometric configurations that establish the precise cutting angles before surgery. The surgeon simply attaches the guide to the bone and performs cutting along the pre-planned paths, eliminating the need for complex intraoperative angle calculations while maintaining surgical flexibility.
Solution Approach 2:
The guide acts as an intermediary device between the surgeon's intent and the actual cutting process. It translates the desired cutting angles and paths into physical guide surfaces and openings that direct the cutting tool, ensuring precise reproduction of the planned osteotomy geometry without requiring the surgeon to manually measure and calculate angles during surgery.
2Manufacturing precision
If guides are introduced for precise cutting, then cutting precision is improved, but device complexity and surgical procedure complexity increase
Solution Approach 1:
The guide incorporates specific geometric features (angled reference surfaces, openings, notches) only at the locations where precision is needed for cutting guidance. The rest of the guide structure remains simple and adaptable. This localized complexity approach provides precise cutting guidance where required while keeping the overall device simple and easy to use.
Solution Approach 2:
The guide is designed to be adaptable to different osteotomy configurations and surgical scenarios. The same basic guide structure can accommodate various cutting angles and patterns by changing the attachment position or using different guide templates, reducing the need for multiple specialized guides and simplifying the overall device set.
3Measurement precision
If precise angular cuts are performed, then bone realignment accuracy is improved, but surgical time and procedure duration increase
Solution Approach 1:
All angular measurements, geometric configurations, and cutting paths are predetermined and encoded into the guide's physical structure during manufacturing. During surgery, the surgeon only needs to attach the guide to the bone and follow the pre-established guidance features, eliminating time-consuming intraoperative measurements and angle calculations while achieving high realignment accuracy.
4Stability of the object's composition
If temporary fixation devices are used to secure the guide, then guide stability is improved, but additional surgical steps and procedure complexity increase
Solution Approach 1:
The temporary fixation mechanism is integrated directly into the guide structure, with fixation openings and attachment features built into the guide body. This combines the guide and fixation system into a single unit, eliminating the need for separate fixation devices and procedures while ensuring stable guide attachment during the cutting process.
Data Source
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AI summary
Resection guides, implants and methods are disclosed. A guide may include a plate with a first end opposite a second end and a medial portion extending therebetween. The guide may also include at least one opening in the first end of the plate. The guide may further include at least one hole positioned along a longitudinal axis of the plate near the at least one opening. Surgical methods for using the guide for bone and joint fusions is also disclosed.