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The Journal of Adhesive Dentistry



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J Adhes Dent 22 (2020), No. 4     24. July 2020
J Adhes Dent 22 (2020), No. 4  (24.07.2020)

Page 383-391, doi:10.3290/j.jad.a44869, PubMed:32666064

Influence of Cleaning Methods on Resin Bonding to Contaminated Translucent 3Y-TZP ceramic
Al-Dobaei, Eglal / Al-Akhali, Majed / Polonskyi, Oleksandr / Strunskus, Thomas / Wille, Sebastian / Kern, Matthias
Purpose: To evaluate the influence of different cleaning methods on the resin bond strength to contaminated translucent 3Y-TZP ceramic.

Materials and Methods: A total of 133 airborne-particle abraded (0.1 MPa) zirconia specimens were divided into 7 groups. Uncontaminated zirconia specimens were either not cleaned (UN) or cleaned with cleaning paste (Ivoclean) (UP1). After contamination by saliva and blood immersion, zirconia specimens were cleaned using either distilled water rinsing (CW), 99% isopropanol in an ultrasonic bath (CI), cleaning paste according to manufacturer's instructions (CP1), cleaning paste with additional rubbing (CP2), or additional airborne-particle abrasion at 0.1 MPa (CA). Three specimens from each group were examined by x-ray photoelectron spectroscopy (XPS). For each group, sixteen Plexiglas tubes filled with composite resin (Clearfil FII, Kuraray Noritake) were bonded to the zirconia specimens using a primer (Clearfil Ceramic Primer Plus, Kuraray Noritake) and luting composite (Panavia V5, Kuraray Noritake). Before measuring tensile bond strength, specimens were stored in distilled water for 3 or 150 days plus 37,500 thermal cycles.

Results: After 3 days, no group showed significantly different TBS compared to the control group UN (p > 0.05). However, groups CW and CI showed significantly lower TBS than all other groups after 150 days (p ≤ 0.05). XPS analysis revealed more organic residue on zirconia surfaces of groups CW and CI than on the other groups.

Conclusion: Cleaning with the cleaning paste and airborne-particle abrasion were effective in removing saliva and blood contamination and enhancing bond strength.

Keywords: contamination, cleaning methods, cleaning paste, bond strength, translucent 3Y-TZP ceramic
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