Effect of low fluency dentin conditioning on tensile bond strength of composite bonded to Er : YAG laser-prepared dentin: a preliminary study.
(2010) Lasers in Medical Science — Vol. 26, n° 2, p. 187-191 (2011)
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- Abstract
- Several studies in the literature have previously shown that the bond strength of a composite bonded to dentin is almost equivalent as when dentin is prepared by either bur or Er:YAG laser. The aim of this preliminary study is to assess the hypothesis that dentin conditioning at low fluency by means of Er:YAG laser can improve the value of adhesion of composites resin to dentin. Sixty surfaces of caries-free human third molars extracted for orthodontic purposes were randomly divided into five groups of 12 teeth. The bur group was the control, prepared using bur, group L was prepared using Er:YAG 200 mJ, SSP (50 µs), 20 Hz, 15 seconds of sweeping, for groups L80, L100, L120, they were prepared first, with the same parameters of the group L 200, and then they received a conditioning, which is, respectively, 15 s of irradiations at: 80 mJ (SSP, 10 Hz), 100 mJ (SSP, 10 Hz), and 120 mJ (SSP, 10 Hz). All samples were restored in a single-component adhesive system: Xenon (DENTSPLY), and ceramX (DENTSPLY) as the resin composite. The specimens were submitted to tensile bond strength test using a universal testing machine. Data were submitted to statistical analysis using ANOVA coupled to a Tukey-Kramer test at the 95% level. The mean values in MPa were 33.3 for group B, 36.73 for group L 200, 41.7 for group L80, 37.9 for group L100, and 39.1 for group L120. Our results showed that dentin conditioning at a low fluency of 12.58 J/cm(2) per pulse, with 80 mJ output energy and 50-µs pulse duration can significantly improve tensile bond strength of a composite bonded to Er:YAG laser-prepared dentine.
- Affiliations
Faculty of Medicine, University of Liège Department of Dental Sciences Faculty of Medicine, University of Liege Department of Dental Sciences Faculty of Medicine, University of Liege Department of Dental Sciences
Citations
Bahrami, B., Askari, N., Tielemans, M., Heysselaer, D., Lamard, L., Peremans, A., Behets Wydemans, C., & Nammour, S. (2010). Effect of low fluency dentin conditioning on tensile bond strength of composite bonded to Er : YAG laser-prepared dentin: a preliminary study. Lasers in Medical Science, 26(2), 187-191. https://doi.org/10.1007/s10103-010-0767-z (Original work published 2011)