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Evaluation of soft tissue response to a poly(urethane urea)
M Mohanty1, J A Hunt, P J Doherty
1Pathophysiology Division, Sree Chitra Tirunal Institute of Medical Sciences and Technology, Trivandrum, India.
Biomaterials
|January 1, 1992
Summary
Investigating polyurethane vascular prostheses revealed that cellular responses, particularly macrophages, varied significantly with microstructure. This suggests microstructure influences implant performance and degradation, not just polymer properties.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Cellular Biology
Background:
- Vascular prostheses performance can vary due to material and cellular factors.
- Polyurethane (PU) prostheses show performance differences potentially linked to microstructure.
- Cellular response to PU microstructure requires quantitative investigation.
Purpose of the Study:
- To quantitatively evaluate cell behavior adjacent to various polyurethane microstructures.
- To determine if cellular response variations correlate with internal microstructure.
- To investigate the relationship between microstructure, cellular response, and implant degradation.
Main Methods:
- Implantation of polyurethane samples with varying microstructures.
- Quantitative analysis of adjacent cell behavior over time and distance from the implant surface.
- Specific focus on the response of macrophages and general cell populations.
Main Results:
- Significant variations in cell behavior profiles were observed with Biomer (a polyurethane urea).
- Cellular response, including macrophages, differed considerably based on internal microstructure.
- The spatial and temporal cell behavior patterns were strongly influenced by the implant's microstructure.
Conclusions:
- Cellular response to polyurethane vascular prostheses is highly dependent on internal microstructure.
- Microstructure influences not only cellular interactions but also susceptibility to degradation.
- Understanding these structure-response relationships is crucial for designing improved vascular prostheses.