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Evaluation of bond strength of resin cement to Er:YAG laser-etched enamel and dentin after cementation of ceramic discs

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Abstract

The purpose of this study was to investigate the shear bond strength (SBS) of ceramic discs luted to differently etched enamel and dentin surfaces. Occlusal surfaces of 64 carious-free human molars and vestibule surfaces of 64 first maxillary incisors were ground to get flat superficial dentin and flattened enamel respectively. After generating 4 groups according to the surface etching method (37% orthophosphoric acid, Er:YAG laser–contact handpiece/scanning handpiece (1 or 2 times of scanning)), ceramic discs were luted to the surfaces with adhesive resin cement (Variolink N, Vivadent Ets., Schaan/Liechtenstein). After etching and cementation, thermocycling of 5000 cycles (Sd Mechatronık Gmbh, Feldkirchen-Westerham, Germany) and SBS test (Servopulser EHFFD1; Shimadzu, Kyoto, Japan) were performed respectively. The surface morphologies of 2 specimens, etched enamel and dentin, prepared for each group were examined with SEM analysis. Failure modes were determined under a USB digital microscope. Data were analyzed with one-way analysis of variance (ANOVA) and Tukey HSD test (α = 0.05). SBS values in dentin surfaces showed statistically significant differences (p < 0.05) among tested groups. The highest SBS among dentin groups was determined in the group which had 2 times etching by Er:YAG laser (11.42 MPa) by a scanning handpiece. No statistical differences were observed in the other dentin or enamel groups. Laser etching seems to be a viable alternative to acid etching on both enamel and dentin surfaces while double etching of dentin with a scanning handpiece can improve the adhesion.

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Authors and Affiliations

  1. Division of Prosthodontics, University of Kyrenia, Mersin 10, Turkey

    Artur Ismatullaev

  2. Division of Prosthodontics, University of Istanbul Okan, Istanbul, Turkey

    Simge Taşın

  3. Dentalplus Implant Clinics, Bakırkoy, Istanbul, Turkey

    Aslihan Usumez

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  1. Artur Ismatullaev
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  2. Simge Taşın
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Conceptualization, methodology, formal analysis and investigation, writing–original draft preparation: Artur Ismatullaev. Writing–review and editing: Simge Taşın. Supervision: Aslıhan Üşümez.

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Correspondence to Artur Ismatullaev.

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Ethical approval was obtained from the Clinical Research Ethics Committee of Bezmialem University in Istanbul, Turkey (No. 71306642/050-01-04/208).

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Ismatullaev, A., Taşın, S. & Usumez, A. Evaluation of bond strength of resin cement to Er:YAG laser-etched enamel and dentin after cementation of ceramic discs. Lasers Med Sci 36, 447–454 (2021). https://doi.org/10.1007/s10103-020-03103-1

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