Evaluation of microtensile and tensile bond strength tests determining effects of erbium, chromium: Yttrium-scandium-gallium-garnet laser pulse frequency on resin-enamel bonding


YILDIRIM T., AYAR M. K., Yesilyurt C., Kilic S.

Nigerian Journal of Clinical Practice, vol.19, no.5, pp.585-590, 2016 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 19 Issue: 5
  • Publication Date: 2016
  • Doi Number: 10.4103/1119-3077.188702
  • Journal Name: Nigerian Journal of Clinical Practice
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.585-590
  • Keywords: Bond strength, chromium: yttrium-scandium-gallium-garnet laser, erbium, micro-tensile, pulse frequency, tensile
  • Uşak University Affiliated: Yes

Abstract

Objectives: The aim of the present study was to compare two different bond strength test methods (tensile and microtensile) in investing the influence of erbium, chromium: yttrium-scandium-gallium-garnet (Er, Cr: YSGG) laser pulse frequency on resin-enamel bonding. Materials and Methods: One-hundred and twenty-five bovine incisors were used in the present study. Two test methods were used: Tensile bond strength (TBS; n = 20) and micro-TBS (μTBS; n = 5). Those two groups were further split into three subgroups according to Er, Cr: YSGG laser frequency (20, 35, and 50 Hz). Following adhesive procedures, microhybrid composite was placed in a custom-made bonding jig for TBS testing and incrementally for μTBS testing. TBS and μTBS tests were carried out using a universal testing machine and a microtensile tester, respectively. Results: Analysis of TBS results showed that means were not significantly different. For μTBS, the Laser-50 Hz group showed the highest bond strength (P < 0.05), and increasing frequency significantly increased bond strength (P < 0.05). Comparing the two tests, the μTBS results showed higher means and lower standard deviations. Conclusion: It was demonstrated that increasing μTBS pulse frequency significantly improved immediate bond strength while TBS showed no significant effect. It can, therefore, be concluded that test method may play a significant role in determining optimum laser parameters for resin bonding.