Flat Fibrous Anchor for Bone Tissue Fixation
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Solution Overview
Problem
Conventional screw-thread anchors for fixing soft tissues to bones face issues with loose anchoring due to mismatched bone and anchor thread densities, difficulty in forming screw holes, and discomfort from metal anchors, with existing shape-transformation methods requiring high force and risking separation.
Innovation Solution
A flat-type sleeve anchor made of fibrous material with an anchor body that can be easily inserted into the bone, featuring an inlet hole, outlet hole, tension holes, and a knot thread for shape transformation through folding or corrugation, allowing for robust anchoring and stable fixation of soft tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a screw-thread anchor is used to fix soft tissues to bone, then anchoring strength is improved, but mismatched bone and anchor thread densities cause loosening over time
Solution Approach 1:
The anchor body transforms from a compressed flat state during insertion to an expanded three-dimensional state after insertion. This dynamic shape change allows the anchor to adapt to bone density variations and maintain reliable fixation over time, resolving the contradiction between initial anchoring strength and long-term stability.
Solution Approach 2:
The anchor undergoes parameter changes in volume and shape after insertion. The flat anchor body expands to occupy more space within the bone tunnel, increasing friction and mechanical interlocking. This parameter change ensures both strong initial anchoring and sustained long-term fixation without loosening.
2Strength
If a metal anchor with screw thread is inserted into bone, then anchoring capability is improved, but difficulty in forming screw holes and sense of rejection increase
Solution Approach 1:
The anchor uses a flat, flexible anchor body that can be compressed into a thin profile for easy insertion through small bone tunnels. This eliminates the need for complex screw hole formation and reduces surgical difficulty while maintaining anchoring capability through post-insertion expansion.
Solution Approach 2:
The anchor transitions from a flexible, compressed state during insertion to a rigid, expanded state after insertion. This dynamic behavior allows easy surgical insertion without complex drilling while ensuring strong anchoring capability is achieved after deployment.
3Strength
If a hollow tube structure anchor body is used for shape transformation, then anchoring is achieved, but large force is required making rapid anchoring difficult
Solution Approach 1:
The anchor transforms from a two-dimensional flat structure to a three-dimensional expanded structure after insertion. This dimensional change allows the anchor to achieve strong anchoring effects while requiring minimal transformation force, as the flat structure naturally conforms to the bone tunnel and expands outward rather than requiring forceful radial deformation.
Data Source
AI summary
A flat-type sleeve anchor is shape-deformed after being inserted into a bone so as to fix, to the bone, soft tissues such as tendons, ligaments, and muscles and, particularly, to a flat-type sleeve anchor which employs an anchor body made of a flat material, so that the anchor can be easily inserted into a bond and then shape-deformed.