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Lasers in Medical Science

, Volume 33, Issue 1, pp 41–49 | Cite as

Sub-ablative Er,Cr:YSGG laser irradiation under all-ceramic restorations: effects on demineralization and shear bond strength

  • Serdar Bağlar
Original Article
  • 161 Downloads

Abstract

This study evaluated the caries resistant effects of sub-ablative Er,Cr:YSGG laser irradiation alone and combined with fluoride in comparison with fluoride application alone on enamel prepared for veneer restorations. And also, evaluated these treatments’ effects on the shear bond strength of all-ceramic veneer restorations. One hundred and thirty-five human maxillary central teeth were assigned to groups of 1a–control, 1b–laser treated, 1c–fluoride treated, 1d–laser + fluoride treated for shear bond testing and to groups of 2a–positive control(non-demineralised), 2b–laser treated, 2c–fluoride treated, 2d–laser + fluoride treated, 2e–negative control (demineralised) for microhardness testing (n = 15, N = 135). Demineralisation solutions of microhardness measurements were used for the ICP-OES elemental analysis. The parameters for laser irradiation were as follows: power output, 0.25 W; total energy density, 62.5 J/cm2 and energy density per pulse, 4.48 J/cm2 with an irradiation time of 20 s and with no water cooling. Five percent NaF varnish was used as fluoride preparate. ANOVA and Tukey HSD tests were performed (α = 5%). Surface treatments showed no significant effects on shear bond strength values (p = 0.579). However, significant differences were found in microhardness measurements and in elemental analysis of Ca and P amounts (p < 0.01). Surface-treated groups showed significantly high VNH values and significantly low ICP-OES values when compared with non-treated (−control) group while there were no significance among surface-treated groups regarding VHN and ICP-OES values. Sub-ablative Er,Cr:YSGG treatment alone or combined with fluoride is as an effective method as at least fluoride alone for preventing the prepared enamel to demineralization with no negative effect on shear bond strength.

Keywords

Laser Sub-ablative Caries Laminate veneer 

Notes

Acknowledgements

The author would like to thank to Prof. Dr. Aslihan USUMEZ DDS; PhD for the supports about the calculation of the laser energy density.

The author would like to thank the Department of Restorative Dentistry, Faculty of Dentistry, Kirikkale University, Turkey, for allowing the use of the Er,Cr:YSGG laser device.

Compliance with ethical standards

Conflict of interest

The author declare no potential conflicts of interest with respect to the authorship and/or publication of this article, and the author do not have any financial interests in the companies whose materials and devices are included in this article.

Ethical approval and informed consent

The protocol of this study plan was approved by the Ethics Committee of Faculty of Medicine, Kirikkale University (Approval Number: 18/13, 29.06.2015). Teeth donators signed an informed consent form and the experiments followed the principles of the Helsinki Declaration.

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Copyright information

© Springer-Verlag London Ltd. 2017

Authors and Affiliations

  1. 1.Department of Restorative Dentistry, School of DentistryUniversity of KirikkaleKirikkaleTurkey

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