Abstract: Objective： To evaluate the effect of Gluma desensitizer on bond strength of different dental cements in vitro. Methods： Twentyfour freshly extracted human molars were prepared to flatdentin and cemented at random to testing specimens made of NickelChromium alloy respectively by VitremerTM resinmodified glass ionomer cement and polycarboxylate cement (PC), twelve in each group. Six teeth of each group were treated by Gluma desensitizer before cementation. All samples were stored in distilled water at 37?℃ for 24 hours, and then they were tested on a universal testing machine (1?mm/min) for tensile bond strength (TBS). The above procedure was repeated for shear bond strength (SBS) with another twentyfour molars. Results： Application of Gluma desensitizer significantly increased the TBS and SBS of VitremerTM luting cement (P<0.05). The TBS and the SBS of PC were also slightly increased, but the changes in TBS had no statistical significance (P>0.05). Conclusion： Gluma desensitizer has no negative impacts on the bond strength of VitremerTM luting cement and PC.

Key words: Gluma desensitizer, Dental cements