Knee Arthroplasty Cutting Blocks with Integrated Alignment Guide
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional knee arthroplasty preparation techniques are prone to errors and complications such as fat emboli, and require separate procedures for femoral and tibial osteotomies, leading to inaccuracies in aligning prostheses and increasing the risk of implant failure.
Innovation Solution
The use of a tibial cutting block, a femoral cutting block, and a block positioning guide that aligns and secures both blocks relative to each other, allowing for simultaneous and precise cutting of the femur and tibia along optimal cutting planes to ensure accurate alignment and placement of prostheses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate procedures are used for femoral and tibial osteotomies with individual guide systems, then the procedure can be performed with conventional tools, but the alignment accuracy deteriorates and the risk of implant failure increases
Solution Approach 1:
The patent combines the femoral and tibial guide systems into a single integrated navigation system that simultaneously guides both osteotomies. This unified system ensures that the mechanical axis alignment is maintained across both bones, eliminating the cumulative errors that occur when separate guide systems are used independently.
Solution Approach 2:
The patent introduces a computerized navigation system as an intermediary that coordinates the positioning and alignment of both femoral and tibial cutting guides. This intermediary system provides real-time feedback and adjustment capabilities, ensuring precise alignment accuracy and reducing the risk of implant failure.
2Productivity
If conventional separate osteotomy procedures are performed, then the surgery can be completed with standard techniques, but the procedure time increases and speed deteriorates
Solution Approach 1:
The patent merges the femoral and tibial osteotomy procedures into a single coordinated surgical workflow. By using an integrated guide system that simultaneously guides both bones, the surgeon can perform both osteotomies in one continuous process rather than completing separate procedures sequentially, thereby reducing total surgery duration and improving procedural efficiency.
3Manufacturing precision
If separate guide systems are used for femur and tibia, then each bone can be addressed independently, but the overall alignment precision deteriorates
Solution Approach 1:
The patent employs a computerized navigation system as an intermediary that continuously monitors and coordinates the alignment of both femoral and tibial cutting guides. This intermediary provides real-time measurement feedback and enables precise adjustments, ensuring that the mechanical axis alignment is maintained with high precision across the entire lower limb.
Data Source
AI summary
Knee arthroplasty preparation devices include a tibial cutting block adapted for attachment to a tibia, a femoral cutting block adapted for attachment to a femur and a block positioning guide engaging the tibial cutting block and the femoral cutting block. Knee arthroplasty preparation methods are also disclosed.