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. 2012 Nov;4(4):192-6.
doi: 10.4047/jap.2012.4.4.192. Epub 2012 Nov 29.

Effect of different provisional cement remnant cleaning procedures including Er:YAG laser on shear bond strength of ceramics

Mustafa Zortuk  1 , Hasan Onder Gumus, Halil Ibrahim Kilinc, Ali Riza Tuncdemir
Affiliations

Effect of different provisional cement remnant cleaning procedures including Er:YAG laser on shear bond strength of ceramics

Mustafa Zortuk et al. J Adv Prosthodont. 2012 Nov.

Abstract

Purpose: The purpose of this study was to evaluate the effect of provisional cement removal by different dentin cleaning protocols (dental explorer, pumice, cleaning bur, Er:YAG laser) on the shear bond strength between ceramic and dentin.

Materials and methods: In total, 36 caries-free unrestored human third molars were selected as tooth specimens. Provisional restorations were fabricated and cemented with eugenol-free provisional cement. Then, disc-shaped ceramic specimens were fabricated and randomly assigned to four groups of dentin cleaning protocols (n = 9). Group 1 (control): Provisional cements were mechanically removed with a dental explorer. Group 2: The dentin surfaces were treated with a cleaning brush with pumice Group 3: The dentin surfaces were treated with a cleaning bur. Group 4: The provisional cements were removed by an Er:YAG laser. Self-adhesive luting cement was used to bond ceramic discs to dentin surfaces. Shear bond strength (SBS) was measured using a universal testing machine at a 0.05 mm/min crosshead speed. The data were analyzed using a Kolmogorov Smirnov, One-way ANOVA and Tukey HSD tests to perform multiple comparisons (α=0.05).

Results: THE DENTIN CLEANING METHODS DID NOT SIGNIFICANTLY AFFECT THE SBS OF CERAMIC DISCS TO DENTIN AS FOLLOWS: dental explorer, pumice, cleaning bur, and Er:YAG laser.

Conclusion: The use of different cleaning protocols did not affect the SBS between dentin and ceramic surfaces.

Keywords: Bond strength; Er:YAG laser; Porcelain; Provisional cement.

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Figures

Fig. 1
Fig. 1
A special loading device was designed to apply a constant load of 9.2 N to the ceramic discs.
Fig. 2
Fig. 2
Results of the shear bond strength tests (P>.05).
Fig. 3
Fig. 3
SEM micrographs of provisional cement contaminated dentin surfaces after dentin cleaning protocols. A: Cleaned with dental explorer, B: Cleaned with cleaning bur, C: Cleaned with pumice, D: Cleaned with LASER (Original magnification×1,000).
Fig. 4
Fig. 4
SEM micrographs of dentin surfaces cleaned with different dentin cleaning protocols after SBS test. A: Cleaned with dental explorer, B: Cleaned with cleaning bur, C: Cleaned with pumice, D: Cleaned with LASER (Original magnification×1,000).
See this image and copyright information in PMC

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