Ultrasonic Bone Hole Shaping for Knee Ligament Fixation
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Solution Overview
Problem
Current surgical methods for reconstructing knee ligaments face challenges in accurately forming bone holes that match the shape of implanted tendons, leading to inefficiencies and potential complications during knee joint reconstruction procedures.
Innovation Solution
The use of an ultrasonic treatment instrument that applies vibration to form bone holes with specific shapes, such as polygonal or elliptical shapes, to accommodate implanted tendons, allowing for precise alignment and fixation during knee joint reconstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional drilling methods are used to form bone holes, then the surgical procedure can be performed, but the bone holes do not accurately match the shape of implanted tendons, leading to inefficiencies and potential complications
Solution Approach 1:
The patent applies ultrasonic vibration to the cutting instrument to enable precise cutting of bone tissue. The ultrasonic vibrations allow the cutting instrument to form bone holes with shapes that accurately match the implanted tendon cross-sections (polygonal, elliptical, or approximately polygonal shapes), thereby improving manufacturing precision while maintaining surgical efficiency through automated shape replication.
2Reliability
If bone holes are formed with larger volume to accommodate tendons, then tendon fixation is secured, but excessive bone volume is removed and tissue invasion is increased
Solution Approach 1:
The patent applies local quality by forming bone holes with specific cross-sectional shapes (polygonal, elliptical, or approximately polygonal) that precisely match the shape of the implanted tendon. This localized shape matching ensures that the bone hole volume is optimized - large enough to securely accommodate and fixate the tendon, but not excessively large, thereby minimizing unnecessary bone removal and tissue invasion while maintaining fixation reliability.
Solution Approach 2:
The cutting instrument is designed to copy the cross-sectional shape of the implanted tendon (whether polygonal, elliptical, or approximately polygonal). By replicating the tendon's cross-sectional geometry in the bone hole, the instrument creates a precise fit that maximizes fixation stability while minimizing the bone hole volume, thus reducing bone loss and tissue invasion.
3Object-affected harmful factors
If bone holes are formed with smaller volume, then tissue invasion is minimized, but the ability to securely fixate the tendon is compromised
Solution Approach 1:
The patent applies local quality by forming bone holes with specific cross-sectional shapes (polygonal, elliptical, or approximately polygonal) that precisely match the shape of the implanted tendon. This localized shape matching ensures that the bone hole volume is optimized - large enough to securely accommodate and fixate the tendon, but not excessively large, thereby minimizing unnecessary bone removal and tissue invasion while maintaining fixation reliability.
Solution Approach 2:
The cutting instrument is designed to copy the cross-sectional shape of the implanted tendon (whether polygonal, elliptical, or approximately polygonal). By replicating the tendon's cross-sectional geometry in the bone hole, the instrument creates a precise fit that maximizes fixation stability while minimizing the bone hole volume, thus reducing bone loss and tissue invasion.
4Ease of operation
If conventional cutting instruments are used, then the surgical procedure can be completed, but the bone holes expand due to joint fluid, compromising surgical precision
Solution Approach 1:
The patent applies ultrasonic vibration to the cutting instrument to enable precise cutting of bone tissue. The ultrasonic vibrations allow the cutting instrument to form bone holes with shapes that accurately match the implanted tendon cross-sections (polygonal, elliptical, or approximately polygonal shapes), thereby improving manufacturing precision while maintaining surgical efficiency through automated shape replication.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables the formation of bone holes that closely match the shape of the implanted tendons, reducing the volume of bone required for the procedure, minimizing tissue invasion, and facilitating quicker ligament formation while preventing bone expansion due to joint fluid, thus enhancing the surgical efficiency and precision.
Implementation Method 1
applying ultrasonic vibration from a treatment portion of an ultrasonic treatment instrument to the femur, thereby cutting and expanding the first bone hole from the inside of the knee joint to the first bone hole of the femur along a predetermined depth
Data Source
AI summary
A surgical procedure of preparing bone holes to dispose an implanted tendon to a femur when performing reconstruction of a ligament in a knee joint, includes: forming a first bone hole in the femur; and applying ultrasonic vibration from a treatment portion of an ultrasonic treatment instrument to the femur, thereby cutting and expanding the first bone hole from the inside of the knee joint to the first bone hole of the femur along a predetermined depth, and forming a second bone hole having a polygonal shape, an approximately polygonal shape, an elliptical shape or an approximately elliptical shape to receive the implanted tendon.