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Blood compatibility and tissue responsiveness on simple and durable methylsiloxane coating
Yasuto Hoshikawa1, Takamasa Onoki2, Masaru Akao3
1Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan; Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan.
Summary
Methylsiloxane (MS) coating enhances inorganic materials, making them suitable biomaterials. This novel coating significantly improves blood compatibility and tissue responsiveness, reducing platelet adhesion and ensuring inertness in blood coagulation.
Area of Science:
- Biomaterials Science
- Surface Chemistry
- Biocompatibility Testing
Background:
- Inorganic materials like glass and metal lack inherent biocompatibility for medical applications.
- Developing advanced coatings is crucial for transforming inert materials into functional biomaterials.
- Methylsiloxane (MS) offers potential as a surface modification agent for inorganic substrates.
Purpose of the Study:
- To evaluate the blood compatibility and tissue responsiveness of methylsiloxane (MS)-coated inorganic substrates.
- To assess the adhesive strength and mechanical properties of the MS coating.
- To determine the potential of MS coating in converting inorganic materials into effective biomaterials.
Main Methods:
- Methylsiloxane (MS) coating prepared via sol-gel hydrolysis of methyltriethoxysilane (MTES).
- Adhesive strength tested using a tear-off method.
- In vitro blood compatibility assessed via platelet adhesion and coagulation time (APTT).
- In vivo tissue responsiveness evaluated through animal testing.
Main Results:
- MS coating demonstrated strong adhesion to glass and metal substrates.
- Platelet aggregation significantly reduced on MS-coated glass tubes (10%) compared to uncoated (99%) and polystyrene (18%).
- MS coating exhibited inertness in blood coagulation, similar to polystyrene.
- Animal tests showed desirable tissue compatibility for bulk MS samples, comparable to titanium.
Conclusions:
- MS coating effectively enhances the biocompatibility of inorganic materials.
- The developed MS coating offers a viable method for creating advanced biomaterials with improved blood and tissue interactions.
- MS-coated inorganic substrates present a promising platform for various biomedical applications requiring inert and compatible surfaces.
