Spinal Implant Barrier Prevents Tissue Adhesion and Wear Debris
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Solution Overview
Problem
Spinal implants that aim to preserve spinal motion lead to increased risks of implant failure due to tissue growth, scar formation, and wear debris, necessitating additional surgeries with high risks, as current methods do not effectively prevent tissue interaction or contain wear debris effectively.
Innovation Solution
The use of biological barriers around spinal implants to prevent tissue invasion, reduce scar formation, and contain wear debris, thereby minimizing the likelihood of implant failure and the need for revision surgery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If anterior approach is used to implant motion preservation devices, then direct access to vertebral disc space is achieved, but risk of vascular injury and scar formation increases
Solution Approach 1:
A barrier device is introduced as an intermediary element between the surgical site and surrounding tissues. The barrier prevents direct contact between scar-forming tissues and the implant, thereby reducing vascular injury risk and scar formation while maintaining anterior access benefits
2Adaptability or versatility
If motion preservation devices are used to maintain spinal mobility, then segmental mobility is preserved, but tissue growth into implant increases causing failure
Solution Approach 1:
The barrier device serves as a mediator that allows the implant to maintain spinal mobility while preventing harmful tissue interaction. The barrier physically separates the mobile implant from surrounding soft tissues, eliminating the pathway for tissue ingrowth while preserving the implant's motion-preserving function
3Ease of manufacture
If larger dissection field is created for motion preservation device placement, then implant placement is facilitated, but scar formation and tissue invasion increase
Solution Approach 1:
The barrier device is positioned within the dissection field to create a controlled interface between the implant and surrounding tissues. This intermediary structure facilitates implant placement while simultaneously preventing scar formation by blocking the pathway for tissue invasion, thus resolving the contradiction between ease of placement and harmful tissue reactions
4Reliability
If wear debris is not contained, then implant function deteriorates, but no containment mechanism is provided
Solution Approach 1:
The barrier device acts as a containment mechanism that intercepts wear debris generated by the mobile implant. By positioning the barrier between the implant and surrounding tissues, it prevents debris from migrating into adjacent soft tissues and bone, thereby maintaining implant function and reducing toxic effects
Data Source
AI summary
A barrier is placed across a portion of or across the totality of a spinal implant. The barrier can serve a variety of purposes, including, for example: (1) to keep tissue away from the implant and minimize or eliminate the likelihood of tissue adhesion with the spine or implant; (2) to decrease or eliminate the likelihood of tissue growth, migration, invasion and/or interaction with the implant; (3) to decrease or eliminate the likelihood of the dissemination of implant wear debris and particles away from the implant and into body cavities; and (4) to decrease or eliminate the likelihood of calcification, ossification, and/or bone formation adjacent to the implant.