Resorbable Polymer Fiber Implants with Channels for Bone Marrow Migration
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Solution Overview
Problem
Current implants for osteo and osteochondral defect repair lack effective communication between the bone marrow and cartilage surface, limiting tissue regeneration and nutrition delivery to deep sclerotic bone tissue.
Innovation Solution
Development of implants with channels between upper and lower surfaces, made from resorbable polymer fibers braided into a structure that allows bone marrow migration and coated with bioceramic, facilitating tissue regeneration and integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If implants are made from solid biodegradable polymers without channels, then structural integrity is maintained, but bone marrow migration and nutrition delivery to deep tissue is prevented
Solution Approach 1:
The implant incorporates a porous structure with interconnected channels formed from braided fiber matrices, allowing bone marrow cells and nutrients to migrate through the implant depth while maintaining structural integrity. The porosity is engineered to provide adequate mechanical support while enabling cellular infiltration and nutrition delivery to deep sclerotic bone tissue.
Solution Approach 2:
The implant uses composite construction combining biodegradable polymer fibers braided into a three-dimensional matrix, creating a structure that integrates both mechanical strength and porosity. The composite architecture of interwoven fibers provides structural reliability while the inherent void spaces enable bone marrow migration.
2Ease of manufacture
If implants use random fiber distribution, then manufacturing is simplified, but tissue regeneration guidance and structural alignment are reduced
Solution Approach 1:
The implant structure is segmented into organized braided matrices with defined fiber orientations. The braiding process creates repetitive structural units with controlled fiber directions that guide tissue regeneration while maintaining manufacturing efficiency through standardized construction patterns.
Solution Approach 2:
Different regions of the implant exhibit tailored fiber orientations and braid patterns optimized for specific functional requirements. The local structure varies to provide enhanced guidance in critical areas while maintaining overall structural integrity, with fiber orientation adapted to match underlying tissue architecture.
Data Source
Figure 1A~2
AI summary
Implants for osteo and osteochondral repair have been developed. These implants include a series of channels between the upper and lower surfaces of the implants, such that when implanted the lower surfaces are situated in an area rich in bone marrow and the channels provide a means for the bone marrow to migrate through the implant. Preferably the implants are made from resorbable polymer fibers, preferably arranged in braids that are knitted or woven together such that the braids are substantially parallel with each other. The implants may be rolled into a bundle of braids with the axis of the braids substantially parallel to the axis of the bundle, to provide channels along the axis of the bundle. A preferred embodiment includes P4HB fibers braided and knitted into a structure that is coated with a ceramic, preferably physiologic calcium phosphate.