Giomers are a relatively new type of restorative material. The name "giomer" is a hybrid of thewords "glass ionomer" and "composite", which pretty well describes what a giomer is claimed to be.
" As noted earlier, the term implies they arecombinations of glass ionomers and composites. Their manufacturers claim they have properties of both glass ionomers (fluoride release, fluoride recharge) and resin composites (excellent esthetics, easy polishability, biocompatibility). Giomers are distinguished by the fact that, while they are resin-based, theycontain pre-reacted glass-ionomer (PRG) particles , this PRG is considered a new novel technology in manufacturing in Dentistry. The particles are made of fluorosilicate glass that hasbeen reacted with polyacrylic acid prior to being incorporated into the resin. The pre-reaction can involvedonly the surface of the glass particles (called surface pre-reacted glass ionomer or S-PRG) or almost theentire particle (termed fully pre-reacted glass ionomer or F-PRG). Giomers are similar to compomers andresin composites in being light activated and requiring the use of a bonding agent to adhere to toothstructure. Giomers contain both of the essential components of glass-ionomer cements and resins but they cannot be classified as compomers, in which a variable amount of dehydrated polyalkeonic acid is incorporated in the resin matrix and the acid does not react with the glass until water uptake occurs. Only one giomer is commercially available at the time of this writing, Shofu's Beautiful, whichuses the S-PRG technology. According to Shofu, Beautiful is indicated for restoring Class I through Vlesions as well as for treating cervical erosion lesions and root caries. It is available in 13 shades and issupplied in syringes.
Giomers are placed in a separate category of composites known as PRG composites. These materials have significant fluoride release, fluoride recharge biocompatibility, smooth surface finish, excellent aesthetics and clinical stability which has made them popular for restoration of root caries, non-carious cervical lesions, class V cavities, and deciduous tooth caries. As per today knowledge, giomers are promising restorative materials and are considered to be most interesting development of near future.
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