Bond Strength to Enamel Using 5th and 6th Generation Adhesives

Objectives: To determine the shear bond strengths of different dental adhesives on enamel

Methods: Human molars and pre-molars were ground to 60 grit creating a flat surface on the enamel and polished to 320 grit. The five adhesives utilized were Moxie TE/5^th generation and Moxie SE/6^th generation (Discus Dental); OptiBond Solo Plus/5^th generation and Optibond XTR /6^th generation (KerrSybron); and Clearfil SE Protect Bond/6^th generation (Kuraray). Composite resin (SDI Glacier) was bonded and cured to the enamel according to manufacturer’s instructions. Specimens (n=10; cylinder mold, d=2.3) were stored in 100% humidity at 37°C for 24 hours. An Instron was utilized to load specimens and calculate the shear bond strength in megapascals (MPa). Analysis was performed using ANOVA and post hoc Tukey test at 0.05 level of significance.

Results: : The mean bond strengths, MPa, and standard deviations of the five adhesives were: Moxie TE 12.0 (5.0), Moxie SE 9.3 (4.1), OptiBond Solo Plus 11.2 (1.8), Optibond XTR 11.7 (3.6), and Clearfil SE Protect Bond 15.0 (4.9). No adhesives were significantly different from each other except between Clearafil SE Protect Bond and Moxie SE (p=0.02).

Conclusions:

Enamel bond strengths were similar among Moxie TE, Moxie SE, OptiBond Solo Plus and Optibond XTR, p>0.05, while Clearfil SE Protect Bond was significantly greater than Moxie SE. Acknowledgements: Materials were provided by manufacturers.