title: Development of hydrogel-based keratoprostheses: a materials perspective.
abstract: Research and development of artificial corneas (keratoprostheses) in recent years have evolved from the use of rigid hydrophobic materials such as plastics and rubbers to hydrophilic, water-swollen hydrogels engineered to support not only peripheral tissue integration but also glucose diffusion and surface epithelialization. The advent of the AlphaCor core-and-skirt hydrogel keratoprosthesis has paved the way for a host of new approaches based on hydrogels and other soft materials that encompass a variety of materials preparation strategies, from synthetic homopolymers and copolymers to collagen-based bio-copolymers and, finally, interpenetrating polymer networks. Each approach represents a unique strategy toward the same goal: to develop a new hydrogel that mimics the important properties of natural donor corneas. We provide a critical review of these approaches from a materials perspective and discuss recent experimental results. While formidable technical hurdles still need to be overcome, the rapid progress that has been made by investigators with these approaches is indicative that a synthetic donor cornea capable of surface epithelialization is now closer to becoming a clinical reality.
authors.affiliation: Department of Ophthalmology, Stanford University, Stanford, California 94305, USA.
authors.forename: David
authors.initials: D
authors.lastname: Myung
authors.forename: Pierre-Emile
authors.initials: PE
authors.lastname: Duhamel
authors.forename: Jennifer R
authors.initials: JR
authors.lastname: Cochran
authors.forename: Jaan
authors.initials: J
authors.lastname: Noolandi
authors.forename: Christopher N
authors.initials: CN
authors.lastname: Ta
authors.forename: Curtis W
authors.initials: CW
authors.lastname: Frank
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D003315:Cornea / Q000737:chemistry* / Q000502:physiology*; D006801:Humans; D020100:Hydrogels / Q000737:chemistry*; D011474:Prosthesis Design
chemical_list: D001672:Biocompatible Materials; D020100:Hydrogels