title: Influence of core thickness and artificial aging on the biaxial flexural strength of different all-ceramic materials: An in-vitro study.
abstract: The purpose of this study was to investigate the flexural strength of all-ceramics with varying core thicknesses submitted to aging. In-Ceram Alumina (IC), IPS e.max Press (EM) and Katana (K) (n=40), were selected. Each group contained two core groups based on the core thickness as follows: IC/0.5, IC/0.8, EM/0.5, EM/0.8, K/0.5 and K/0.8 mm in thickness (n=20 each). Ten specimens from each group were subjected to aging and all specimens were tested for strength in a testing machine either with or without being subjected aging. The mean strength of the K were higher (873.05 MPa) than that of the IC (548.28 MPa) and EM (374.32 MPa) regardless of core thickness. Strength values increased with increasing core thickness for all IC, EM and K regardless of aging. Results of this study concluded that strength was not significantly affected by aging. Different core thicknesses affected strength of the all-ceramic materials tested (p<0.05).
authors.affiliation: Department of Prosthodontics, Corlu State Hospital.
authors.forename: Sibel
authors.initials: S
authors.lastname: Dikicier
authors.affiliation: Department of Prosthodontics, Center for Dental Sciences, Health Sciences University.
authors.forename: Simel
authors.initials: S
authors.lastname: Ayyildiz
authors.affiliation: Department of Prosthodontics, Istanbul Aydin University Faculty of Dentistry.
authors.forename: Julide
authors.initials: J
authors.lastname: Ozen
authors.affiliation: Department of Prosthodontics, Center for Dental Sciences, Health Sciences University.
authors.forename: Cumhur
authors.initials: C
authors.lastname: Sipahi
mesh_terms: D002516:Ceramics; D003776:Dental Porcelain; D003799:Dental Stress Analysis; D006801:Humans; D008422:Materials Testing; D018583:Pliability; D013314:Stress, Mechanical; D013499:Surface Properties
chemical_list: D003776:Dental Porcelain
keywords: Aging; All-ceramic; Core thickness; Flexural strength