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Dent. J. 2017, 5(4), 32; https://doi.org/10.3390/dj5040032

Effect of Decontamination and Cleaning on the Shear Bond Strength of High Translucency Zirconia

Department of Prosthetic Dentistry, University Hospital Regensburg, 93051 Regensburg, Germany
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Received: 28 September 2017 / Revised: 30 October 2017 / Accepted: 9 November 2017 / Published: 14 November 2017
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Abstract

(1) Background: This study evaluated the bonding performance of high translucency zirconia after diverse surficial decontamination and cleaning procedures. (2) Methods: High translucency zirconia (LavaTM Esthetic) specimens (2.0 mm × 20 mm × 10 mm) were exposed to different surface treatments prior to bonding to CoCr cylinders (d = 5 mm, height = 3 mm). All surfaces were sandblasted (40 µm aluminum oxide, 2 bar) and treated with alcohol (al), saliva (s), saliva + water (sw), or saliva + NaOCl + water (sn) before bonding was performed with the following adhesive luting systems: RelyXTM Unicem 2 (RX), ScotchbondTM Universal (SBU) + RelyXTM Ultimate (RU) or Monobond Plus (MP) + Multilink® Automix (ML). After 24 h, thermocycling (TC:12,000 × 5 °C/55 °C) and 90 days of storage at 37 °C in distilled water, the shear bond strength (SBS) was evaluated according to ISO/TS 11,405:2015. Failure modes along bonding areas were characterized. Means and standard deviations (n = 10 per group) were determined and statistically analyzed with one-way ANOVA/Bonferroni (α = 0.05). (3) Results: The SBS after 24 h varied between 3.5 (sRX) and 69.4 MPa (snMP + ML). Values from 0 (sRX) to 70.3 MPa (swRX) were found after TC. Data after 90 days of storage showed the lowest values for sRX (0 MPa) and the highest values for alSBU + RU (75.5 MPa). Adhesive failure was noted at all aging conditions. (4) Conclusions: SBU + RU or RX and MP + ML including saliva decontamination of the ceramic surface with water or NaOCl + water allow efficient bonding to LavaTM Esthetic. View Full-Text
Keywords: high translucency zirconia; saliva contamination; bond strength; surface cleaning; decontamination high translucency zirconia; saliva contamination; bond strength; surface cleaning; decontamination
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Krifka, S.; Preis, V.; Rosentritt, M. Effect of Decontamination and Cleaning on the Shear Bond Strength of High Translucency Zirconia. Dent. J. 2017, 5, 32.

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