Meniscal Implant With Latching Fixation For Joint Load Distribution
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Solution Overview
Problem
Current meniscal replacement technologies, including scaffold systems and synthetic replacements, fail to effectively restore meniscal volume and function due to poor vascularization and mechanical simulation, leading to limited long-term success and increased risk of degenerative joint changes.
Innovation Solution
The development of an implant system comprising an implant device with a body portion and elongate members, secured using a fixation device with latching and cooperating elements, allowing for adjustable tension and secure fixation to the subject's bone, thereby mimicking the mechanical behavior of natural meniscal tissue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If scaffold systems are used for meniscal replacement, then tissue regeneration is promoted, but meniscal volume restoration is insufficient
Solution Approach 1:
The implant device combines a polymeric matrix material with embedded reinforcing fibres to create a composite structure that provides both the regenerative properties of scaffolds and the mechanical strength needed to restore full meniscal volume and function
Solution Approach 2:
The implant features circumferentially orientated fibres embedded in the polymeric matrix to locally reinforce the structure in the direction of primary mechanical stress, providing anisotropic mechanical properties that mimic natural meniscal tissue while maintaining volume
2Strength
If synthetic replacement materials are used, then mechanical strength is improved, but vascularization is poor
Solution Approach 1:
The polymeric matrix is formulated with porous characteristics that allow vascular ingrowth and tissue integration while maintaining the mechanical strength provided by the embedded fibre reinforcement structure
Solution Approach 2:
The composite structure combines biocompatible polymeric material with structural fibres to achieve both adequate mechanical strength and biological compatibility for vascularization
3Ease of manufacture
If meniscal tissue is resected during partial meniscectomy, then torn region is removed, but degenerative joint changes are accelerated
Solution Approach 1:
The implant device is designed to replace only the specific torn or damaged meniscal tissue while preserving the healthy peripheral rim and surrounding joint structures, avoiding the need for extensive resection
Solution Approach 2:
The implant provides immediate mechanical support and load distribution upon implantation, preventing the degenerative changes that would otherwise result from meniscal tissue loss before biological integration occurs
4Reliability
If cadaveric donor meniscus is transplanted, then meniscal function is restored, but sizing compatibility varies
Solution Approach 1:
The implant device is designed with adjustable parameters including the length of elongate members and tensioning mechanisms that allow customization to match the specific anatomical dimensions and mechanical requirements of each patient's joint
Solution Approach 2:
The implant includes adjustable tensioning elements that allow post-implantation optimization of mechanical properties to achieve perfect sizing compatibility and functional restoration for each individual case
Data Source
AI summary
An implant system for implantation at a joint. The implant system includes an implant device with a body portion having first and second ends, and a first elongate member, extending from the first or second end of the body portion. The implant system has a corresponding fixation device with at least one latching element. The first elongate member has at least one cooperating element capable of cooperating with the at least one latching element of the fixation device in use.