Cannulated Screw Anchor Fixation for Bone
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Solution Overview
Problem
During surgery, anchors inserted into pre-drilled holes in bone often fail to be flush with the bone surface, leading to instability and potential movement, compromising the secure reattachment of tissue to bone.
Innovation Solution
A method and system utilizing a cannulated screw inserted into the pre-drilled hole to secure an anchor in place, ensuring a firm connection between tissue and bone, particularly in low-quality bone, using a knotless suture anchor application with a modified inserter rod and screw driver for precise placement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an anchor is inserted into a pre-drilled hole in bone, then the suture can be attached to the bone, but the anchor may not be flush with the bone surface leading to instability and potential movement
Solution Approach 1:
A second anchor is introduced as an intermediary element to secure the first anchor in place. This second anchor acts as a mediator that prevents the first anchor from moving or adjusting, thereby ensuring stable fixation of the suture to the bone without requiring the first anchor to be perfectly flush with the bone surface.
2Ease of operation
If an anchor is inserted into bone without being flush with the surface, then installation is simpler, but the anchor may move or adjust jeopardizing secure repair
Solution Approach 1:
The second anchor serves as a mediator that allows the first anchor to be inserted without precise positioning relative to the bone surface, while still ensuring secure repair. The second anchor compensates for any misalignment or movement of the first anchor, maintaining repair integrity despite ease of insertion.
3Reliability
If a traditional anchor system is used, then suture attachment is achieved, but additional knots are required which increase surgical time and complexity
Solution Approach 1:
The knot-tying step is extracted and eliminated from the surgical procedure. The anchor system is designed so that the suture is automatically secured to the bone through the anchor mechanism itself, without requiring additional knots. This reduces surgical time and procedural complexity while maintaining reliable suture attachment.
Data Source
AI summary
A method for securing a repair, such as a rotator cuff repair and includes an anchor placed within a hole formed in bone and a cannulated screw inserted into the hole after the anchor has been inserted to effectuate a firm and secure connection of tissue to bone, particularly when the quality of the bone does not permit optimal fixation. The method allows superior tissue fixation to bone with the ease of knotless suture anchor application.