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KMID : 1023820120040040192
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The Journal of Advanced Prosthodontics
2012 Volume.4 No. 4 p.192 ~ p.196
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Effect of different provisional cement remnant cleaning procedures including Er:YAG laser on shear bond strength of ceramics
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Mustafa Zortuk
Hasan Onder Gumus
Halil Ibrahim Kilinc
Ali Riza Tuncdemir
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Abstract
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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.
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KEYWORD
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Bond strength, Er:YAG laser, Porcelain, Provisional cement
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