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Effect of parallel surface microgrooves and surface energy on cell growth
E T den Braber1, J E de Ruijter, H T Smits
1Department of Oral Function, Dental School, University of Nijmegen, The Netherlands.
Journal of Biomedical Materials Research
|April 1, 1995
Summary
Surface treatments like radiofrequency glow discharge significantly impact cell growth and alignment on microtextured silicone. Physicochemical properties influence cell growth, but not cell shape on these surfaces.
Area of Science:
- Biomaterials Science
- Surface Chemistry
- Cell Biology
Background:
- Surface properties critically influence cellular behavior.
- Microtexturing and surface treatments are key for biomaterial design.
- Understanding these interactions is vital for developing advanced biomedical devices.
Purpose of the Study:
- To investigate the effects of surface microtexture and various surface treatments on rat dermal fibroblast behavior.
- To evaluate how wettability and surface energy correlate with cellular responses.
- To determine the role of physicochemical parameters in cell growth, shape, and orientation.
Main Methods:
- Fabrication of silicone substrata with varying microgroove dimensions (2.0, 5.0, 10.0 microns).
- Application of surface treatments: ultraviolet irradiation (UV), radiofrequency glow discharge (RFGD), and combined UVRFGD.
- Culturing rat dermal fibroblasts (RDF) on treated and untreated surfaces for up to 7 days.
- Characterization using contact angle measurements, surface energy analysis, and scanning electron microscopy (SEM).
Main Results:
- UV treatment did not alter contact angles or surface energies of similar topographies.
- RFGD and UVRFGD treatments significantly reduced contact angles compared to UV and untreated surfaces.
- RDF cell growth was higher on RFGD and UVRFGD treated surfaces than on UV-treated surfaces.
- Microgrooves of 2.0 and 5.0 microns induced stronger cell orientation than 10.0-micron grooves.
Conclusions:
- Physicochemical properties like wettability and surface free energy influence cell growth.
- Surface microtexture, particularly groove dimensions, dictates cell shape and orientation.
- Combined RFGD treatment offers a promising approach for enhancing cell growth on microtextured silicone.