Composite Soft Tissue Implants with Synthetic Filaments
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Solution Overview
Problem
Current surgical implants for soft tissue repair, whether biologic or synthetic, face challenges such as late failure, chronic inflammation, and post-surgical complications like chronic pain and inadequate strength, particularly with biologic grafts and non-absorbable synthetic meshes.
Innovation Solution
Composite implants comprising a substantially two-dimensional biologic matrix material combined with non-absorbable synthetic polymeric filaments in various configurations, such as non-woven or woven, to stimulate a mild foreign body response and maintain fibrous collagenous tissue strength after the biologic matrix is absorbed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If non-absorbable synthetic mesh materials are used, then durable long-lasting soft tissue repairs are achieved, but chronic inflammation and foreign body response occur triggering fibrosis and scar tissue formation
Solution Approach 1:
The patent combines biologic graft materials with synthetic mesh materials to create a composite implant. The biologic component (e.g., collagen, porcine small intestinal submucosa) provides biocompatibility and reduces foreign body response, while the synthetic component (e.g., polypropylene, polyester) provides structural durability and long-term support. This composite structure allows the implant to maintain mechanical strength over time while minimizing chronic inflammation and fibrosis.
2Strength
If higher density meshes are used, then greater mechanical strength is achieved, but denser scar tissue forms leading to increased procedural complications such as chronic pain
Solution Approach 1:
The patent employs varying mesh densities within different regions of the composite implant. High-density synthetic mesh is strategically placed in areas requiring maximum mechanical strength and support, while lower-density regions are used where tissue integration and flexibility are priorities. This localized quality variation optimizes the balance between structural support and biocompatibility, reducing excessive fibrosis and associated complications.
3Object-generated harmful factors
If low density large pore mesh is used, then fewer complications and less pain occur, but sufficient strength is not achieved especially in the first few weeks post implantation
Solution Approach 1:
The patent merges biologic graft materials with synthetic mesh to create a composite structure where each material compensates for the other's weaknesses. The biologic component provides excellent biocompatibility and tissue integration with minimal fibrosis, while the synthetic component supplies the necessary mechanical strength during the critical early healing period. Together, they achieve both low complication rates and adequate structural support.
4Object-generated harmful factors
If absorbable synthetic mesh materials are used, then initial FBR and scar tissue response occur similar to non-absorbable mesh, but the scar tissue is not strong enough or does not maintain its strength over time
Solution Approach 1:
The patent uses biologic graft materials as an intermediary between the synthetic mesh and the host tissue. The biologic component (e.g., crosslinked collagen) provides a temporary scaffold that promotes tissue integration and maintains structural integrity during the critical healing period. As host tissue regenerates and matures, the biologic material gradually degrades, transferring load to the newly formed tissue while the synthetic mesh continues to provide long-term structural support.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composite implants reduce late failure associated with biologic grafts while minimizing complications from synthetic meshes by providing ongoing strength and reducing graft shrinkage, thus enhancing the durability and reliability of soft tissue repairs.
Implementation Method 1
the filaments are adapted to stimulate a mild, but ongoing, foreign body response in the region of the implant in order to maintain the presence of fibrous collagenous tissue
Data Source
AI summary
According to one aspect of the invention, composite implants for soft tissue repair are provided which comprise (a) a substantially two-dimensional piece of biologic matrix material and (b) one or more non-absorbable synthetic polymeric filaments.