title: Strength investigation of artificial substitutes for human teeth in in vitro studies.
abstract: This study investigated whether metals or resins can replace human teeth in in vitro fracture tests of endodontically treated teeth (ETT), as ETT show high heterogeneity and small availability. Eight incisor-shaped roots per group were adhesively restored with fiber-reinforced composite posts, composite core build-ups and Co-Cr-Mo crowns. Specimens were thermally cycled and mechanically loaded (TCML) and fracture strength was determined. The results varied between 0 N and 348 N. Extracted ETT may show comparable strength and survival during TCML to teeth in situ and therefore are the first choice for in vitro testing. Substitutes show comparable fracture patterns but different fracture values.
authors.affiliation: Department of Prosthetic Dentistry, Regensburg University Medical Center, D-93042 Regensburg, Germany. martin.rosentritt@klinik.uni-regensburg.de
authors.forename: Martin
authors.initials: M
authors.lastname: Rosentritt
authors.forename: Margarete
authors.initials: M
authors.lastname: Reill
authors.forename: Michael
authors.initials: M
authors.lastname: Naumann
authors.forename: Arnold
authors.initials: A
authors.lastname: Nowak
authors.forename: Gerhard
authors.initials: G
authors.lastname: Handel
mesh_terms: D002858:Chromium Alloys; D003188:Composite Resins; D003764:Dental Materials; D003799:Dental Stress Analysis; D055119:Elastic Modulus; D004853:Epoxy Resins; D006801:Humans; D008422:Materials Testing; D011176:Post and Core Technique; D014082:Tooth Fractures / Q000503:physiopathology; D014093:Tooth, Artificial; D019553:Tooth, Nonvital; D014783:Viscosity
chemical_list: D002858:Chromium Alloys; D003188:Composite Resins; D003764:Dental Materials; D004853:Epoxy Resins