title: The zirconia-reinforced lithium silicate ceramic: lights and shadows of a new material.
abstract: This study aims to investigate the mechanical properties, composition and surface preparation for adhesive bonding of the recently introduced zirconia-reinforced lithium silicate (ZLS) glass-ceramic. One single block of ZLS was used to prepare the specimens (n=14). The fracture toughness (Ft) and the Vickers hardness (HV) were measured on specimens partially crystallized (PCs) (n=4) and fully crystallized (FCs) at 840°C for 8 min (n=4). The surface treatment was done using hydrofluoric-acid gel (HF) at different concentrations and times of action on FCs specimens (n=4). SEM-EDX was used to test elemental composition and crystalline phases (n=2). The new ZLS glass-ceramic showed significantly higher values of HV and Ft for FCs, PCs showed a brittle behavior. The surface etching should be made using HF at 4.9% for 20 s.
authors.affiliation: Department of Medical, Oral and Biotechnological Sciences, University of Chieti-Pescara.
authors.forename: Tonino
authors.initials: T
authors.lastname: Traini
authors.forename: Bruna
authors.initials: B
authors.lastname: Sinjari
authors.forename: Romeo
authors.initials: R
authors.lastname: Pascetta
authors.forename: Nicola
authors.initials: N
authors.lastname: Serafini
authors.forename: Giorgio
authors.initials: G
authors.lastname: Perfetti
authors.forename: Paolo
authors.initials: P
authors.lastname: Trisi
authors.forename: Sergio
authors.initials: S
authors.lastname: Caputi
mesh_terms: D000134:Acid Etching, Dental; D002516:Ceramics; D001840:Dental Bonding; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D006858:Hydrofluoric Acid; D008094:Lithium; D008422:Materials Testing; D017640:Silicates; D013314:Stress, Mechanical; D013499:Surface Properties
chemical_list: D017640:Silicates; D003776:Dental Porcelain; D008094:Lithium; D006858:Hydrofluoric Acid