Microleakage of resin-modified glass ionomer cement restorations: An in vitro study

Experimental Initial Partial Polymerization Method for Fuji II Placement Evaluated for Microleakage With/Without Fuji Coat

“…This potential factor has been noted in previous in vitro studies. 18,28,29 Use of a finishing varnish such as Fuji Coat can prevent early hydration or dehydration and is especially important during the first hour following placement of RMGI restorations. 23,24 Water plays a key role in the acid-base reaction by acting as the medium for the reaction and is incorporated into the cement structure.…”

“…18,19 From this interaction, an adhesive bond is formed with the hydroxyapatite crystals. 18,19 The adhesive bond between GI materials and the dentin/enamel surface requires a clean substrate for intimate access of adhesive to its surface, complete wetting of the substrate surface, and liquid-to-solid transformation of the adhesive. 16 Unlike resin-based materials, GIs require only a mildly acidic conditioning agent, and stronger etchants run the risk of substantially reducing the calcium available for binding chemically.…”

“…16 The curing process for glass ionomers is a chemical acid-base reaction that results in an ion-exchange layer between the material and the tooth surface. 18,19 This layer consists of ionic crosslinks formed as the polyacrylate ions found in the material diffuse with phosphate and calcium ions located on the tooth surface. 18,19 From this interaction, an adhesive bond is formed with the hydroxyapatite crystals.…”

“…18,19 This layer consists of ionic crosslinks formed as the polyacrylate ions found in the material diffuse with phosphate and calcium ions located on the tooth surface. 18,19 From this interaction, an adhesive bond is formed with the hydroxyapatite crystals. 18,19 The adhesive bond between GI materials and the dentin/enamel surface requires a clean substrate for intimate access of adhesive to its surface, complete wetting of the substrate surface, and liquid-to-solid transformation of the adhesive.…”

A comparative study of microleakage between giomer and ormocer restoration in class I cavity of first permanent premolar teeth in vivo

“…However, microleakage of a restoration is one of the main reasons for its failure. 1 Microleakage means passage of bacteria, fluids, molecules, ions along the various gap present in the cavity/restoration interface. 1 Clinically, the majority of restorative materials show varying degree of marginal microleakage either due to changes in dimension or a lack of good adaptation to cavity walls.…”