Abstract
Background:The major difference in the chemical composition of Y-TZP ceramics, as compared with conventional porcelain, led researchers to develop alternative solutions for achieving durable and long term bonding with the zirconia surface.Objective:The study aims to evaluate the effects of glow discharge treatment on the bonding between cement and zirconia.Methods:The zirconia rings and rods were prepared with the Zirconia Y-TZP powder and TZ-3YSB-E (Tosoh-Zirconia) through auto-mix to investigate the glow discharge and thermo-cycling. An orientation Teflon mold was used to centralize each rod into the zirconia ring, and aided as a cementation jig during the cementation procedure.Results:Cohesive failure (2/3 or more of luting agent remained on the zirconia surface) has been majorly observed with RelyX Ultimate, while adhesion failure (less than 1/3 of the luting agent remained on the zirconia surface) has been primarily observed in Ketac-Cem. Mixed failure was observed among the three specimen including Rely X Unicem 2, Multilink Auto-mix and Ceramir.Conclusion:The glow discharge surface treatment procedure had a major impact on bond strength to zirconia.
Highlights
Replacement of metal-based restorations is a desirable change in dentistry
Failure pattern of specimens displayed a wide range of qualities, including cohesive failure (2/3 or more of luting agent was remained on zirconia surface), adhesive failure, and mixed
As per the cement specimen, cohesive failure has been majorly observed with RelyX Ultimate (n = 12) as compared to 5 specimens of adhesive failure
Summary
One of the most promising non-metalbased materials is Yttria-Tetragonal Zirconia Polycrystaline (Y-TZP) ceramics. Y-TZP ceramics are proven to be a strong and reliable material for dental practitioners, researchers and manufacturers [1 - 4]. Dental ceramics are based primarily on zirconia that involves a transformation from a tetragonal crystalline phase to a monoclinic phase at the tips of cracks. Such cracks are present in the regions of tensile stress that improve the mechanical properties of dental ceramics [1]. The major difference in the chemical composition of Y-TZP ceramics, as compared with conventional porcelain, led researchers to develop alternative solutions for achieving durable and long term bonding with the zirconia surface
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