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Modulation of corneal epithelial stratification by polymer surface topography
B A Dalton1, M D Evans, G A McFarland
1CSIRO Molecular Science and Cooperative Research Centre for Eye Research and Technology, North Ryde, NSW, Australia.
Journal of Biomedical Materials Research
|May 13, 1999
Summary
Polymer surface topography significantly impacts corneal epithelialization. Optimal pore sizes (0.1-0.8 microm) promote better tissue stratification and protein adhesion for corneal implants.
Area of Science:
- Biomaterials Science
- Ophthalmology
- Tissue Engineering
Background:
- Corneal implant success relies on epithelial integration.
- Polymer surface characteristics, including topography and porosity, are critical factors influencing tissue response.
Purpose of the Study:
- To investigate the effect of varying polymer surface topographies on corneal epithelial tissue stratification.
- To assess the deposition of proteins crucial for epithelial adhesion on different polymer surfaces.
Main Methods:
- Utilized an in vitro model with polycarbonate membranes of diverse pore sizes (0.1-3.0 microm) and a nonporous control.
- Evaluated epithelial tissue stratification via light and electron microscopy.
- Assessed protein deposition using immunohistochemistry.
Main Results:
- Surfaces with pore diameters between 0.1-0.8 microm demonstrated superior epithelial stratification and protein deposition.
- Larger pores (> or = 1.0 microm) showed reduced stratification; cytoplasmic processes penetrated pores of 2.0-3.0 microm.
- Nonporous surfaces exhibited lower stratification compared to optimal porous surfaces.
Conclusions:
- Polymer surface topography plays a crucial role in achieving persistent epithelialization for corneal implants.
- Optimizing pore size is essential for enhancing tissue integration and biomaterial performance in ocular applications.