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This critical appraisal reviews four articles looking at dental erosion and its relationship with GERD. ""Purpose:? To determine the influence of curing mode on the surface hardness http://www.selleckchem.com/products/ABT-737.html of seven resin cements used to lute indirect composite restorations. Materials and Methods:? Seven commercial dual-curing resin cements were tested: two were total-etch (RelyX ARC [3M ESPE, St. Paul, MN, USA] and Variolink II [Ivoclar Vivadent, Schaan, Liechtenstein]); one was self-etch (Multilink Automix [Ivoclar Vivadent]), and four were self-adhesive (RelyX Unicem [3M ESPE], Maxcem Elite [Kerr Corp., Orange, CA, USA], SmartCem2 [Dentsply, Detrey, GmbH, Konstanz, Germany], and G-Cem [GC CORPORATION, Itabashi-Ku, Tokyo, Japan]). Three specimens (0.5?��?6.5mm) of each material were prepared for each of three experimental groups: Group 1 (cements allowed to self cure); Group 2 (cements light-cured for 40?seconds); and Group 3 (cements light-cured for 80?seconds). All specimens were cured through a 4-mm-thick composite cylinder (Filtek Z250-A3). Surface microhardness numbers were determined at 20?min after preparation. Results were analyzed by two-way analysis of variance and Student�CNewman�CKeuls tests (p? http://www.selleckchem.com/products/Nutlin-3.html Superficial hardness was significantly influenced by the resin cement tested (p? http://www.selleck.cn/products/Methazolastone.html showing the lowest mean values in the self-curing mode. After light irradiation for 40 or 80?seconds, Maxcem Elite exhibited the lowest mean hardness values of all the resin cements tested. Conclusion:? The microhardness of resin cements is highly dependent on the brand. Dual-curing resin cements should always be light irradiated for longer periods than that recommended by manufacturers. Dual-curing resin cements should always be light-cured for longer irradiation times, as light irradiation for 80?seconds yields the highest microhardness values in comparison with self-curing or light irradiation for 40?seconds. However, some self-adhesive resin cements exhibit low microhardness values when used to cement 4-mm-thick indirect composite restorations regardless of the curing mode applied. (J Esthet Restor Dent 23:116�C125, 2011) ""Four categories of resin-based dentin/enamel adhesives are currently available. These include the three-step etch-and-rinse, ��one-bottle�� etch-and-rinse, two-step self-etch primer systems, and ��all-in-one�� self-etch adhesives.