Effect of surface treatment on the initial bond strength of different luting cements to zirconium oxide ceramic |
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Authors: | F P Nothdurft P J Motter P R Pospiech |
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Institution: | (1) Department of Prosthetic Dentistry and Dental Materials Sciences, Dental School and Clinics, Saarland University, Homburg/Saar, Germany |
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Abstract: | The objective of this study was to compare the shear bond strength to zirconium oxide ceramic of adhesive-phosphate-monomer-containing
(APM) and non-APM-containing (nAPM) luting cements after different surface treatments. nAPM cements: Bifix QM, Dual Cement,
Duo Cement Plus, Multilink Automix, ParaCem Universal DC, PermaCem Smartmix, RelyX ARC, Variolink Ultra, and Variolink II;
APM cements: Panavia EX, Panavia F2.0, and RelyX UniCem. Groups of ten test specimens were each prepared by layering luting
cement, using cylindrical Teflon molds, onto differently treated zirconium dioxide discs. The surface treatments were airborne-particle
abrasion with 110 μm alumina particles, silica coating (SC) using 30 μm alumina particles modified by silica (Rocatec System)
or SC and silanization. Bifix QM and Multilink Automix were used in combination with an additional bonding/priming agent recommended
by the manufacturers. After 48 h of water storage, each specimen was subjected to a shear test. Combinations involving APM-containing
cements (14.41–23.88 MPa) generally exhibited higher shear bond strength than those without APM (4.29–17.34 MPa). Exceptions
were Bifix QM (14.20–25.11 MPa) and Multilink Automix (19.14–23.09 MPa) in combination with system-specific silane or priming
agent, which were on the upper end of shear bond strength values. With the use of the Rocatec system, a partially significant
increase in shear bond strength could be achieved in nAPM cement. Modified surface treatment modalities increased the bond
strength to zirconium oxide, although the most important factor in achieving a strong bond was the selection of a suitable
cement. System-specific priming or bonding agents lead to further improvement. |
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Keywords: | Bond strength Luting cements Zirconium oxide Surface treatment Ceramic Zirconia |
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