Influence of Particle and Air-Abrasion Moment on Y-TZP Surface Characterization and Bond Strength.

Autor: Martins SB; Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP, Araraquara, São Paulo, Brazil., Abi-Rached FO; Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP, Araraquara, São Paulo, Brazil., Adabo GL; Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP, Araraquara, São Paulo, Brazil., Baldissara P; Department of Oral Sciences, Alma Mater Studiorum University of Bologna, Italy., Fonseca RG; Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP, Araraquara, São Paulo, Brazil.
Jazyk: angličtina
Zdroj: Journal of prosthodontics : official journal of the American College of Prosthodontists [J Prosthodont] 2019 Jan; Vol. 28 (1), pp. e271-e278. Date of Electronic Publication: 2017 Dec 13.
DOI: 10.1111/jopr.12718
Abstrakt: Purpose: To evaluate the influence of particle and air-abrasion on the surface characterization and shear bond strength (SBS) of a Y-TZP ceramic with a resin cement.
Materials and Methods: Y-TZP specimens were air-abraded with 50 μm alumina particles; 120 μm alumina particles; 30 μm silica-coated alumina particles (Rocatec Soft); 110 μm silica-coated alumina particles (Rocatec Plus). Air-abrasion was performed before (BS); after (AS); before and after (BAS) zirconia sintering. Surface characterization included roughness (n = 10), wettability (n = 10), morphology (n = 2), and elemental composition (n = 2). For SBS (n = 11), composite resin discs were bonded to the air-abraded and silane-treated zirconia surface, with the resin cement RelyX ARC. Failure mode was determined. Roughness, wettability, and SBS data were analyzed by two-way ANOVA with pairwise interaction and Tukey's test (α = 0.05).
Results: Air-abrasion performed with coarser particles at BS and BAS moments provided the highest roughness values, while the lowest roughness values were observed with particles combined with AS moment (p < 0.01). Rocatec Plus provided lower contact angle than the 120 μm alumina particles (p = 0.013), and BAS exhibited lower contact angle than BS (p = 0.002). The combinations 120 μm/BS and the silica-coated alumina particles/AS and /BAS showed the highest SBS (p < 0.05). The combination of each particle/BAS was statistically similar to the same particle/AS. Failure mode was 100% adhesive for all groups. The interaction particle size/air-abrasion moment determined the morphological pattern. Silicon was observed only in the Rocatec groups.
Conclusions: Roughness was influenced by the particle size and was higher when the zirconia was air-abraded in its green stage. The particle composition played an important role in the wettability and both studied air-abrasion moments provided similar wettability than the one in which air-abrasion is usually performed. The highest SBS values were observed in the three moments, by using certain particles for each moment.
(© 2017 by the American College of Prosthodontists.)
Databáze: MEDLINE
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