Autonomous Bone Resection Mechanism for Precise Knee Cuts
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Solution Overview
Problem
Existing resection devices for bone surgery, particularly in total knee replacements, require manual guidance and navigation systems, which can be cumbersome and time-consuming, and lack autonomy in performing precise incisions.
Innovation Solution
A resection device with a fastening element that rigidly attaches to the bone, comprising a base element, rotatable and displaceable connecting elements, and an end effector, which can perform bone resection autonomously without human intervention, allowing for precise and efficient cutting paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual guidance and navigation systems are used for bone resection, then the surgeon can control the resection process, but the procedure time increases and the system becomes more complex
Solution Approach 1:
The resection device is configured to perform bone resection autonomously without requiring manual guidance or navigation systems. The device attaches to the bone arrangement and automatically executes the resection procedure, eliminating the need for continuous surgeon intervention and navigation system operation, thereby reducing procedure time while maintaining operational control
2Measurement precision
If navigation systems and manual alignment are used, then positioning can be adjusted, but the device complexity and setup time increase
Solution Approach 1:
The patent eliminates the need for external navigation systems and manual alignment procedures by integrating positioning capabilities directly into the resection device. The device attaches to the bone arrangement and automatically determines its position and orientation, extracting the complex navigation system from the overall surgical setup while maintaining positioning accuracy
3Manufacturing precision
If a milling device is used for bone resection, then precise cutting paths can be achieved, but the requirements for size, rigidity, speed, torque and bearing increase
Solution Approach 1:
The resection device divides the bone resection task into multiple sequential cutting operations along a predetermined path. Instead of requiring a single high-capacity milling device with extensive specifications, the device uses a cutting tool that moves through segmented portions of the bone, reducing the instantaneous size, rigidity, speed, torque and bearing requirements while maintaining overall cutting precision
Data Source
AI summary
A resection device for resecting a bone of a bone arrangement without user interaction comprises a fastening element for rigid fastening to the bone arrangement and a base element rigidly connected to the fastening element. The base element includes a base element longitudinal axis. The device comprises a rotatable connecting element arranged rotatably about the base element, wherein the base element longitudinal axis forms an axis of rotation for the rotatable connecting element, and a displaceable connecting element. The displaceable connecting element performs a translation along the axis of rotation relative to the base element. The device comprises a connecting element connected to the displaceable connecting element or the rotatable connecting element via a pivot joint. The pivot joint includes a pivot joint axis of rotation. The connecting element can be rotated about the pivot joint axis of rotation. The connecting element includes an end effector for bone resection.