Osteotomy Guide Plate with Sliding Central Alignment
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Solution Overview
Problem
Existing surgical techniques for osteotomy face challenges in maintaining precise angular relationships between cuts, leading to complications such as malunion due to rotational or angular displacement after osteotomy fixation.
Innovation Solution
A surgical kit comprising at least two lateral plates and a central plate, where the lateral plates are fixed over the bone at a precise distance based on a pre-operative plan, and the central plate is used to maintain anatomical alignment and securely fix the lateral plates to the bone using fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional osteotomy techniques are used, then surgical flexibility is maintained, but manufacturing precision and measurement precision of bone cuts deteriorate
Solution Approach 1:
The guide system is pre-configured with multiple guide blocks positioned at specific distances from each other before the surgery begins. The guide blocks are attached to a guide plate with predetermined spacing, allowing the surgeon to perform parallel bone cuts at exact intervals without complex measurements during the procedure. This preliminary preparation of the guide system resolves the contradiction by providing manufacturing precision through pre-engineered geometry rather than intraoperative adjustment.
Solution Approach 2:
The guide system is divided into modular components including a guide plate and multiple interchangeable guide blocks. Each guide block can be independently positioned and secured to the bone, allowing flexible configuration for different surgical requirements while maintaining precise relative positioning. This segmentation enables the system to adapt to various surgical scenarios without requiring a completely new device, thus managing device complexity while preserving precision.
2Measurement precision
If multiple parallel cuts are performed manually, then surgical adaptability is maintained, but measurement precision and angular relationship accuracy deteriorate
Solution Approach 1:
The guide system incorporates dynamic elements that allow adjustment during surgery. The guide blocks can be repositioned along the guide plate, and additional guide blocks can be added or removed based on the specific surgical requirements. The system transitions from a static, fixed configuration to a dynamic, adaptable one, resolving the contradiction between measurement precision and surgical adaptability by allowing the guide system itself to be reconfigured intraoperatively.
Solution Approach 2:
The guide plate serves multiple functions: it provides a reference surface for positioning guide blocks, acts as a template for making parallel cuts, and can be adapted to different bone geometries through the use of various guide blocks. This multi-functionality allows a single device to address multiple surgical scenarios, maintaining adaptability while ensuring precise angular relationships through the unified reference plane of the guide plate.
3Manufacturing precision
If bone shortening is performed without pre-fixation, then surgical speed is maintained, but manufacturing precision of bone alignment deteriorates
Solution Approach 1:
The guide system is attached to the bone and the guide blocks are positioned at the exact desired shortening distance before the actual bone cutting begins. This preliminary positioning of the guide structure establishes the precise geometry for bone shortening in advance, allowing the surgeon to simply follow the pre-established guide rather than measuring and adjusting during the procedure, thus maintaining both accuracy and surgical efficiency.
Data Source
AI summary
A surgical kit and a method for performing osteotomy is disclosed. The surgical kit comprises at least two lateral plates and a central plate. The two lateral plates are scaled and fixed over a surgical bone adjacent to each other with an exact distance measured by the scaled lateral plates while the central plate is over two lateral plates to maintain the alignment. The distance is equal to the shortening amount of bone based on the pre-operative measurements. The central plate slides laterally over the two lateral plates to expose the surgical site of the bone. Shortening osteotomy is performed to shorten the bone equal to the distance between the two lateral plates. The central plate then laterally slides over the two lateral plates to achieve the anatomic alignment. Further, the central plate and the two lateral plates are securely fixed to the bone using one or more fasteners.