Bone Graft Shaping Device With Adjustable Cutting Inclination
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Solution Overview
Problem
Current methods for shaping and cutting bone grafts during shoulder joint reconstruction are prone to dimensional and geometric errors, require freehand manipulation, and increase operating time and costs due to the difficulty in achieving precise inclinations and dimensions, especially in the presence of body fluids and poor bone quality.
Innovation Solution
A kit comprising a device with an engagement and adjustment body, main body, and centring mechanism that allows for precise shaping and cutting of bone grafts by providing controlled adjustment of height and inclination, ensuring accurate geometric parameters without damaging the implant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If freehand shaping and cutting of bone graft is performed during surgery, then the surgeon can immediately prepare the graft, but dimensional and geometric errors occur compromising precision
Solution Approach 1:
The bone graft is extracted and prepared outside the operating room before surgery. All shaping, cutting, and geometric adjustments are completed in advance using specialized equipment, allowing the surgeon to receive a pre-prepared graft that requires no intraoperative manipulation. This eliminates precision errors while maintaining surgical efficiency.
2Ease of operation
If bone graft is shaped in situ in the humeral head, then the graft can be immediately used, but dimensional and geometric errors occur that do not meet pre-operative planning requirements
Solution Approach 1:
The bone graft undergoes complete preparation including extraction, shaping, cutting, and geometric adjustment before the surgical procedure. This advance preparation ensures that all dimensional and geometric parameters match the pre-operative plan exactly, eliminating the need for intraoperative shaping and ensuring immediate usability with perfect precision.
3Adaptability or versatility
If freehand manipulation of bone graft is performed on the back table, then the surgeon can adjust the graft, but operating time increases and errors occur
Solution Approach 1:
All adjustments to graft parameters including height, inclination, and geometry are performed during the pre-operative preparation phase using specialized equipment. The graft is completely finalized before surgery, eliminating any need for intraoperative adjustment and thereby reducing operating time while maintaining full adaptability through the pre-shearing process.
4Productivity
If freehand shaping is performed in the presence of body fluids and poor bone quality, then the surgery can proceed, but handling difficulty increases and errors occur
Solution Approach 1:
The bone graft is extracted and completely prepared in a controlled pre-operative environment with optimal conditions, free from body fluids and with adequate time for careful handling. All shaping, cutting, and finishing are completed before the graft is brought into the surgical field, ensuring easy handling and eliminating the difficulties associated with intraoperative preparation in challenging conditions.
Data Source
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AI summary
A device for shaping and cutting a bone graft comprises a main body (2) extending along a longitudinal axis (X) from a lower end (2i) to an upper end (2s) and having inside it a housing (3) for the insertion of the bone graft (100) to be shaped, an upper opening (4), located at the upper end (2s), for the insertion of the bone graft (100) into the housing (3), a lower support (5) designed to support the bone graft and an upper surface (6) defining a cutting plane, placed at the upper end (2s) and containing said upper opening (4) which is inclined with respect to the longitudinal axis (X) by an angle (a) ranging between 90° and 30°, preferably between 90° and 60°.