Degradation studies and biological behavior on an artificial cornea material

Area of Science:

• Biomaterials Science
• Ophthalmology
• Tissue Engineering

Background:

• Keratoprosthesis implantation is contraindicated in patients with dry eye syndrome, Stevens-Johnson syndrome, or recurrent transplant rejection.
• Developing a biocompatible artificial cornea is crucial for restoring vision in these challenging patient groups.

Purpose of the Study:

• To engineer a highly biocompatible keratoprosthesis using glass-reinforced hydroxyapatite (GRHA).
• To evaluate the physicochemical and biological properties of GRHA with varying porogen concentrations for artificial cornea applications.

Main Methods:

• GRHA samples were fabricated with 10%, 30%, and 50% porogen to control porosity.
• Physicochemical analyses included density, porosity, roughness, and degradation studies.
• Biological evaluation involved human fibroblast cell culture, MTT assays, and cell imaging.

Main Results:

• Samples with 30% and 50% porogen exhibited higher porosity and surface roughness.
• GRHA showed minimal degradation under simulated physiological conditions but significant loss in acidic environments.
• Fibroblast cultures demonstrated satisfactory biological performance, with enhanced cell invasion and proliferation on samples B (30% porogen) and C (50% porogen).

Conclusions:

• A GRHA material with suitable physicochemical and biological properties for an artificial cornea was successfully fabricated.
• The GRHA cornea with 30% porogen demonstrated the most promising characteristics, including adequate porosity, low degradation, and favorable biological performance for potential transplantation.