Abstract
Glass ionomer cements are a two-component hybrid material, consisting of inorganic glass particles, surrounded by an insoluble hydrogel matrix. They are a group of materials based on the acid/ base reaction between poly (alkenoic) acid and an ion-leachable silicate glass. Their biocompatibility, osteoconductive behavior, and ability to bond to bone and metals have generated interest in the material for medical applications. GIC are widely used in dental medicine as an obturation material in primary teeth for treatment and prophylaxis of dental caries, because they have the ability to create a physicochemical bond to tooth structure and to release fluoride. They are currently frequently used in otological and neuro-otological surgery. Apart from ossicular chain reconstruction, they are used for repair of tegmen defects, outer ear canal reconstruction, mastoid obli teration, and stabilization of some hearing prostheses.
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