Shear bond strength of self-etch and total-etch adhesives to bovine enamel and dentin

Authors

  • Carolina Carramilo Raposo Federal University of Maranhão
  • Ivone Lima Santana Federal University of Maranhão

Keywords:

Dental adhesives, self-etch, shear strength

Abstract

Purpose: To evaluate the shear bond strength of a self-etch adhesive and an etch-and-rinse adhesive when bonded to bovine enamel and dentin. Methods: The labial surfaces of 28 bovine mandibular incisors were wet ground to achieve a flat enamel or dentin surface. A 1-step self-etch adhesive and a 3-step etch-and-rinse adhesive were bonded to enamel or dentin according to the manufacturer’s instructions (Adper Easy One and Adper Scotchbond, respectively). A composite resin cylinder (Filtek Z350 XT) was built upon the adhesive layer using a silicon mold (2 mm in diameter  3 mm high). The specimens were stored in 37°-C distilled water for 24 h. The bond strength was measured by a universal testing machine at a crosshead speed of 1.0 mm/min. Student’s t-test was used to compare bond strength values between adhesives at the 95% confidence level. Results: For the enamel specimens, Adper Scotchbond had significantly higher values of bond strength than Adper Easy One (P = 0.007). For the dentin specimens, there were no statistically significant differences between adhesives (P = 0.12). Conclusion: Adper Easy One showed lower shear bond strength than Adper Scotchbond on enamel. For dentin, Adper Easy One showed bond strength similar to Adper Scotchbond.

Author Biographies

Carolina Carramilo Raposo, Federal University of Maranhão

DDS, MSc student, Post Graduate Program in Dentistry

Ivone Lima Santana, Federal University of Maranhão

PhD, Professor, Department of Odontology I

Downloads

Published

2012-04-17

Issue

Section

Original Article