Scanning electron microscopic analysis of diseased and healthy dental hard tissues after Er:YAG laser irradiation: In vitro study

Effect of Er,Cr: YSGG Laser on the Microtensile Bond Strength of Two Different Adhesives to the Sound and Caries-affected Dentin

“…12 After laser irradiation, no smear layer is created. 13 When using a self-etch adhesive system on irradiated dentin, the acidic monomers act on a smear layer dentin-free surface. A number of studies examined the effects of laser irradiation on the bonding efficiency of self-etch adhesives to dentin, especially caries-affected dentin.…”

Effect of the Er, Cr: YSGG Laser Parameters on Shear Bond Strength and Microstructure on Human Dentin Surface

“…Therefore, this restoration parameter can be measured accurately by the bonding test. The bonding of resin composite material to the tooth structure prepared with different types of lasers has been reported (Visuri et al, 1996;Armengol et al, 1999;Martínez-Insua et al, 2000;Carrieri et al, 2007;Ekworapoj et al, 2007;Lee et al, 2007;de Carvalho et al, 2008;Gurgan et al, 2008;Chou et al, 2009). These studies reported variable results comparing the bond strengths of composite resin to a laser-prepared and acid etched dentin surface, and suggested that the laser preparation is more effective than etching in bonding strength of the composite resin to the tooth structure (Obeidi et al, 2010;Turkmen et al, 2010;Navimipour et al, 2011).…”

“…The sudden evaporation of bound water causes micro-explosions that blast away tiny particles of the tooth (Obeidi et al, 2010). Previous studies reported that irregularities and the crater-shaped appearance of ablated dentin was comparable to the dentine surface after acid etching, which might promote micromechanical interlocking between dental restorative materials and the tooth surface (Visuri et al, 1996;Armengol et al, 1999;Martínez-Insua et al, 2000;Carrieri et al, 2007;Gurgan et al, 2008). Despite its efficiency, reports on the bond strengths of composite resin to a tooth substrate prepared by a laser are often confusing and contradictory.…”

“…Some studies reported higher bond strengths to laser-prepared dentin than to acid-etched dentin (Visuri et al, 1996;Carrieri et al, 2007). Others have reported significantly lower bond strengths on laser preparation (Armengol et al, 1999;Martínez-Insua da Silva Dominguez et al 2000;Gurgan Kiremitci et al 2008) and others have reported no significant differences (Abdalla & Davidson, 1998). Generally there are three adhesive systems.…”

Avaliação da alteração de temperatura durante a remoção de dentina hígida e desmineralizada de dentes decíduos utilizando laser de Er:YAG em diferentes freqüências

“…Em dentina hígida, a energia a ser consumida na ablação deveria ser menor e desta forma, o conteúdo de energia dissipada ao tecido dental hígido seria maior apresentando alterações de temperatura mais elevadas em relação ao tecido desmineralizado (Armengol et al, 1999), ao contrário do que acontece na dentina desmineralizada, que é mais permeável por conter mais água e assim a taxa de ablação se intensifica. Além da temperatura, neste estudo, um outro aspecto avaliado, qualitativamente, foi a obervação da morfologia da superfície dentinária irradiada com o laser Er:YAG, que é de fundamental importância, e tem como finalidade entender as alterações superficiais, para no futuro, definir novos protocolos adesivos adequados para os dentes decíduos.…”