Surface treatment with a fractional CO2 laser enhances shear bond strength of resin cement to Zirconia

Ahrari, F. and Boruziniat, A. and Alirezaei, M. (2016) Surface treatment with a fractional CO2 laser enhances shear bond strength of resin cement to Zirconia. Laser Therapy, 25 (1). pp. 19-26.

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Aims: The present study investigated the effect of different surface treatments on shear bond strength (SBS) of resin cement to zirconia. Materials and methods: Ninety zirconia blocks were prepared and divided into 6 groups of 15 by treatment. Group 1 served as the control group, whereas groups 2 and 3 were treated with air abrasion and a universal primer (Monobond plus), respectively. The remaining zirconia copings were treated with a fractional CO2 laser for 10 seconds using 10 W/10 mJ (group 4), 10 w/14 mJ (group 5) or 20 W/10 mJ (group 6). A luting cement (Clearfil SA) was bonded to the treated zirconia surfaces and cured for 40 seconds. SBS was measured with a universal testing machine and the type of bond failure was determined. Results: There was a statistically significant difference in SBS among the study groups (p<0.001). The highest SBS values were observed in the groups treated with the fractional CO2 laser at settings of 20 W/10 mJ (28.1 MPa) or 10 W/14 mJ (27.4 MPa), followed by the specimens treated with the universal primer (22.8 MPa). The control specimens exhibited the lowest SBS (9.4 MPa) among the study groups (p<0.05). There was no significant difference in the distribution of failure modes among the groups (p=0.871). Conclusions: The application of fractional CO2 laser can improve bond strength of resin cement to zirconia ceramic, and thus it could be considered as an appropriate alternative to conventional methods of zirconia surface treatment. ©2016 JMLL, Tokyo, Japan

Item Type: Article
Additional Information: Cited By :10 Export Date: 16 February 2020 Correspondence Address: Ahrari, F.; Dental Research Center, School of Dentistry, Mashhad University of Medical Sciences, Vakilabad Boulevard, Iran; email:
Uncontrolled Keywords: Bond strength Ceramic CO2 Fractional Laser Porcelain Resin cement Surface treatment Zirconia methacrylic acid derivative methacryloxydecyl dihydrogen phosphate unclassified drug zirconium oxide adhesion air abrasion Article carbon dioxide laser chemical bond controlled study physical phenomena shear bond strength shear strength surface property
Subjects: W General medicine- Health professions
Divisions: Mashhad University of Medical Sciences
Depositing User: mr lib4 lib4
Date Deposited: 03 Mar 2020 08:59
Last Modified: 03 Mar 2020 08:59

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