Mechanical reliability of air-abraded and acid-etched bonded feldspar ceramic

Dental Materials : Official Publication of the Academy of Dental Materials
Leonardo D SoaresRafael R Moraes

Abstract

This study investigated the effect of surface treatment (air-abrasion with alumina or hydrofluoric acid-etching) on feldspar ceramic mechanical strength and initial reliability (24h) before/after adhesive luting. Ceramic discs (VITA) were tested as monolithic specimens (Acid; Abrasion), luted bilayers (Acid+luting agent; Abrasion+luting agent), or untreated (Control). Luted groups were coated using resin-based agent (RelyX Veneer, 3M ESPE). Biaxial flexural test with ball-on-ring setup was carried out (n=30). Biaxial flexural strength (σbf, MPa), characteristic strength (σ0, MPa), and Weibull modulus (m) were calculated for axial positions z=0 (ceramic surface) and z=-t2 (luting agent surface). For each condition, 95% confidence intervals were calculated. Scanning electron microscopy was used for topography and fractography analyses. At z=0, σbf and σ0 of luted specimens were higher than of monolithic specimens for both surface treatments. Groups Acid and Abrasion had lower σbf and σ0 than Control. Group Abrasion had poorer mechanical strength. Similar structural reliability was observed for all conditions except for the group Abrasion+luting agent, which had lower m than all other groups. At z=-t2, no significant differences b...Continue Reading

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Citations

Dec 17, 2016·Brazilian Dental Journal·Leonardo FederizziAloísio Oro Spazzin
Jun 14, 2018·Brazilian Dental Journal·Fabíola Jardim BarbonAloísio Oro Spazzin
Jun 14, 2018·Brazilian Oral Research·Fabíola Jardim BarbonNoéli Boscato
Aug 25, 2018·BioMed Research International·Jader SebbenAloísio O Spazzin
Jan 18, 2021·European Journal of Oral Sciences·Fernanda Brombila BlumentrittNoéli Boscato
Nov 11, 2019·The Journal of Prosthetic Dentistry·Fabíola Jardim BarbonNoéli Boscato
Aug 7, 2021·The Japanese Dental Science Review·Haitham ElbishariHeba E Elsubeihi

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