3D Printed Osteotomy Guides for Joint Replacement Surgery
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Solution Overview
Problem
Existing osteotomy tools for Total Knee Arthroplasty are complex, difficult to manufacture and assemble, leading to prolonged operation times and increased production costs.
Innovation Solution
A medical auxiliary device for joint bone replacement surgery, comprising first and second auxiliary devices with cutting grooves and fitting surfaces, designed to guide an orthopedic saw and provide stable fixation during surgery, manufactured using 3D printing technology for a precise fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional osteotomy tools are used, then osteotomy can be performed, but the device complexity increases and manufacturing becomes difficult
Solution Approach 1:
The auxiliary device is divided into separate components: a positioning component with fitting surfaces for different bone sections, and a cutting guide component with cutting grooves. This segmentation allows each component to be manufactured independently using 3D printing technology, reducing overall device complexity while maintaining guidance accuracy.
Solution Approach 2:
The device uses custom-designed auxiliary tools that replicate the specific geometry of the patient's bone structures based on preoperative imaging. These copied geometric forms enable precise fitting and guidance without requiring complex adjustable mechanisms, simplifying the device structure while ensuring accurate osteotomy.
2Reliability
If conventional osteotomy tools are used, then bone cutting can be performed, but operation time increases
Solution Approach 1:
The auxiliary devices are custom-designed and manufactured before surgery based on preoperative CT or MRI scans. The fitting surfaces and cutting grooves are pre-configured to match the patient's specific anatomy, eliminating the need for intraoperative adjustments and reducing surgery time while maintaining high precision.
Solution Approach 2:
The invention replaces complex mechanical adjustment systems with fixed, pre-configured geometric forms that directly guide the cutting tool. This substitution of mechanical complexity with geometric precision reduces setup time and improves operational efficiency during surgery.
3Reliability
If conventional osteotomy tools are used, then femoral and tibial surfaces can be removed, but production costs increase
Solution Approach 1:
The invention changes the manufacturing parameter from traditional precision machining to additive manufacturing (3D printing). This parameter change allows complex geometric forms to be produced more cost-effectively, reducing production costs while maintaining or improving guidance accuracy compared to conventional manufacturing methods.
Data Source
AI summary
A medical auxiliary device for joint bone replacement surgery that allows clinicians to precisely, quickly, and conveniently cut joint bones while providing stable fixation during the surgical procedure. a first auxiliary device that fits the femur to be cut, with a first fitting surface at the top that conforms to the shape of the femur. One side of the first auxiliary device is equipped with a first cutting groove and multiple locking holes. The first cutting groove allows an orthopedic saw to cut the femur, and the locking holes allow screws to pass through and fix the first auxiliary device to the femur. A second auxiliary device is fixed to the tibia to be cut, with a second fitting surface at the bottom that conforms to the shape of the tibia. One side of the second auxiliary device is equipped with a second cutting groove and multiple fixation holes.