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Effect of low fluency dentin conditioning on tensile bond strength of composite bonded to Er:YAG laser-prepared dentin: a preliminary study

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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/cm2 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.

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Authors and Affiliations

  1. Department of Dental Sciences, Faculty of Medicine, University of Liege, Liege, Belgium

    B. Bahrami, N. Askari, M. Tielemans, D. Heysselaer & S. Nammour

  2. L.A.S.M.O.S, Facultés Universitaires Notre Dame de la Paix, Namur, Belgium

    L. Lamard & A. Peremans

  3. Experimental Morphology Unit, Université catholique de Louvain, Brussels, Belgium

    C. Nyssen-Behets

  4. 147, Bld Lemonnier, 1000, Brussels, Belgium

    B. Bahrami

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  1. B. Bahrami
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  2. N. Askari
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  5. L. Lamard
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  8. S. Nammour
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Correspondence to B. Bahrami.

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Bahrami, B., Askari, N., Tielemans, M. et al. Effect of low fluency dentin conditioning on tensile bond strength of composite bonded to Er:YAG laser-prepared dentin: a preliminary study. Lasers Med Sci 26, 187–191 (2011). https://doi.org/10.1007/s10103-010-0767-z

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  • DOI: https://doi.org/10.1007/s10103-010-0767-z

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