Does the bond strength of highly translucent zirconia show a different dependence on the airborne-particle abrasion parameters in comparison to conventional zirconia?

Journal of Prosthodontic Research
Peng ZhaoShanshan Gao

Abstract

To compare the effects of airborne-particle abrasion protocols on the surface morphology, the phase transformation and the resin bond strength of highly translucent zirconia (M) and conventional zirconia (Z). Thirteen groups (N = 12) of Z and M specimens were prepared. Except for the control group, the specimens were sandblasted with conditions involving different grit sizes (50 μm or 110 μm), treatment times (10 s or 20 s) and pressures (0.1 MPa, 0.3 MPa or 0.6 MPa). The surface morphology was analyzed using scanning electron microscope (SEM) and the phase analysis was conducted with X-ray diffraction (XRD). The Ra and the shear bond strength (SBS) were measured and statistically analyzed, and the failure mode was determined by optical microscope. The surface morphologies were strongly dependent on treatment conditions. Larger particle size and higher pressure resulted in higher Ra for both materials. Longer blasting time resulted in higher Ra for Z but not M. Overall, the SBS increased with increasing Ra; the highest average SBS was achieved by M and exceeded 18 MPa. The monoclinic transformation was not found in any treatment for M, but was found in Z. Z and M showed different dependence on the airborne-particle abrasion par...Continue Reading

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Jul 7, 2020·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Renata Vasconcelos MonteiroGrace Mendonça De Souza
Aug 12, 2020·Clinical Oral Investigations·Xinyan ZhangJunling Wu
Mar 16, 2021·Journal of Zhejiang University. Science. B·Zhiwei SuBaiping Fu
Apr 29, 2021·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Leila Nasiry KhanlarJunji Tagami

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