Comparison of the Shear Bond Strengths of Various Self-etching Primers

Objectives:The purpose of this study was to compare the shear bond strengths of six self-etching systems to dentin. Methods:Fourty-two human third molar teeth stored in distilled water were used. The flat dentinal surfaces were produced on the cervical regions of the teeth by wet grinding using 600 grit silisiumcarbide paper. The teeth were divided into six groups (n=7). In each group, different self-etching primers (Adhese-Ivoclar Vivadent, Clearfil SE Bond-Kuraray, Xenon III Dentsply, Tyrian SPE+One Step Plus-Bisco, Adper Prompt L-Pop-3M ESPE, Clearfil Protect Bond-Kuraray) were applied according to the manufacturers’ instructions. A teflon mold with a central hole (2,5 mm in diameter and 2 mm in thickness) is placed on the specimens then filled with a composite resin (Filtek Z250-3M ESPE) and light cured for 20 seconds. The prepared teeth specimens’ were embeded in acrylic resin for mechanical testing. Samples were stored in distilled water at 37°C for 24 hours and then the shear bond strengths using Universal Testing Machine (Instron Model No:5569/2000) at a crosshead speed of 0,1 mm/min were determined. Data were analysed using one-way analysis of variance (ANOVA). Comparison between pairs were made using Tukey HSD test at a level of significance of p<0,05. Results:The mean shear bond strength values (MPa) and standard deviations are as follows: Adhese (20,69±5,90), Clearfil SE Bond (32,59±8,27), Xenon III (15,86±3,92), Tyrian SPE+One Step Plus (20,70±4,70), Adper Prompt L-Pop (20,48±4,44), Clearfil Protect Bond (39,27±9,07). Conclusions:The results indicated that Clearfil SE Bond and Cleafil Protect Bond display significantly higher bond strengths than the others.