Graft Preparation Station for Precise Bone Defect Repair
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Solution Overview
Problem
Current methods for repairing bone defects, such as those in articular surfaces, often fail to accurately dimension and angle bone grafts to match the specific geometry of the defect, leading to suboptimal joint stability and healing.
Innovation Solution
A surgical device and method that utilize a graft preparation station with a base assembly and cart assembly to precisely cut and shape bone grafts based on predefined thickness and angle, using a pivotable base guide and movable cart assembly to align and cut the graft between a mounting plate and a raise plate, allowing for customized graft dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional bone graft preparation methods are used, then the surgical process is simple and quick, but the graft cannot be accurately dimensioned and angled to match the specific geometry of the defect
Solution Approach 1:
The preparation station is divided into distinct functional modules: a base assembly with a pivotable base guide, a cart assembly with mounting and raise plates, and a cutting tool. This segmentation allows each component to perform its specific function independently while contributing to the overall precision of graft dimensioning.
Solution Approach 2:
The base guide is pre-configured with specific angles and the cart assembly is pre-positioned before the cutting operation begins. The mounting plate and raise plate are established in advance to define the graft's dimensional parameters, allowing the actual cutting to execute a pre-planned geometric transformation.
2Adaptability or versatility
If a fixed cutting angle is used, then the device structure is simple, but the graft cannot be customized to match different defect geometries
Solution Approach 1:
The base guide is designed to be pivotable relative to the base assembly, transforming it from a static component to a dynamic one. This pivotability allows the cutting angle to be adjusted and locked at different positions, enabling customization of the graft angle to match various defect geometries while maintaining structural integrity during the cutting operation.
Solution Approach 2:
The system enables change of the cutting angle parameter by pivoting the base guide to different angular positions. This parameter adjustment allows the same device to produce grafts with different angular specifications, providing versatility without requiring multiple specialized tools.
3Productivity
If manual graft shaping is performed, then the equipment required is minimal, but the time and skill required to achieve precise dimensions increases
Solution Approach 1:
The cart assembly acts as an intermediary between the surgeon's positioning decisions and the actual cutting action. By establishing the mounting plate and raise plate in advance to define the desired graft geometry, the system mediates the transformation from conceptual dimensions to physical reality, reducing the skill burden on the operator during the critical cutting phase.
Solution Approach 2:
The system replaces manual manual shaping operations with a guided mechanical cutting process. The base guide and cart assembly provide mechanical constraints that ensure precise dimensional outcomes, substituting the need for skilled manual shaping with a more accessible mechanical guidance system.
Data Source
AI summary
This disclosure relates to a graft preparation station and methods for repairing bone defects. The station described herein may be utilized for dimensioning a graft prior to positioning the shaped graft at a surgical site.