Annulus Repair Blocking Member with Anchors
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Solution Overview
Problem
Current surgical methods for repairing annulus defects in spinal surgery are time-consuming and often ineffective, leading to a higher incidence of disc herniation or implant expulsion due to difficulties in closing large defects with conventional suturing techniques.
Innovation Solution
The use of a blocking member positioned within or adjacent to the annulus defect, which is attachable to adjacent tissue using anchors, to create a mechanical barrier and prevent migration of nucleus material or implants, combined with instruments for preparing the vertebrae to secure the blocking member in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional suturing techniques are used to repair annulus defects, then the repair process can be performed with simple tools, but the repair is time-consuming and often ineffective for large defects
Solution Approach 1:
A blocking member is introduced as an intermediary element to seal the annulus defect. This blocking member acts as a mediator between the defect and the surrounding tissue, providing immediate closure without requiring time-consuming suturing. The blocking member can be a plug, patch, or other structure that physically blocks the defect and promotes tissue growth across it.
Solution Approach 2:
The blocking member is pre-formed and prepared before insertion into the defect. This preliminary preparation allows for rapid deployment during surgery, eliminating the need for time-consuming suturing procedures. The blocking member is designed in advance with appropriate size, shape, and attachment features to ensure immediate effectiveness.
2Reliability
If conventional sutures are used to close the annulus defect, then the surrounding tissue can be pulled together, but the sutures may cut or tear through the annulus tissues
Solution Approach 1:
The blocking member serves as an intermediary that distributes forces across the defect rather than concentrating stress at suture points. This mediator prevents the sutures from directly bearing the load that would cause them to cut through the tissue. The blocking member absorbs and distributes the mechanical stresses, protecting the surrounding annulus tissue from damage.
Solution Approach 2:
The blocking member can be constructed from flexible materials that conform to the defect geometry and distribute loads evenly. This flexible structure prevents stress concentration that would lead to tissue tearing, while still providing effective closure of the defect.
3Reliability
If a blocking member is used to seal the annulus defect, then the defect can be effectively closed and tissue growth promoted, but additional instruments and procedures are required to prepare and secure the blocking member
Solution Approach 1:
The blocking member is designed to perform multiple functions: it seals the defect, provides a surface for tissue growth, and incorporates attachment features for securing it in place. This multi-functionality eliminates the need for separate components for each function, reducing overall system complexity despite the added effectiveness.
Solution Approach 2:
The attachment features are integrated directly into the blocking member structure rather than being separate components. This merging of functions allows the blocking member to be secured to the surrounding tissue through a single integrated structure, simplifying the overall system while maintaining reliable defect sealing.
Data Source
AI summary
Systems and methods for repairing annulus defects include at least one blocking member positionable in or adjacent to the annulus defect, and at least one anchor for securing the blocking member to adjacent tissue recessed into the adjacent vertebrae. The blocking member extends at least partially across the annulus defect for repair of the defect and/or retention of nucleus material, one or more implants, bio-compatible materials or device, and/or other objects positioned in the disc space. Instruments are provided to facilitate preparation of the implantation site of the annulus repair system.