title: Fracture toughness testing of visible light- and chemical-initiated provisional restoration resins.
abstract: This in vitro study determined the fracture toughness of four classes of resin using wet and dry test environments, following 48 hours of wet storage. Two of the resins were light initiated, while the other two were chemically initiated. No significant difference in fracture toughness was detected for the wet and dry test environments using miniature compact tension specimens. The light-initiated, urethane dimethacrylate resin demonstrated a significantly higher fracture toughness than the poly(methyl methacrylate) resin.
authors.affiliation: Section of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus 43210-1241, USA.
authors.forename: A G
authors.initials: AG
authors.lastname: Gegauff
authors.forename: J J
authors.initials: JJ
authors.lastname: Wilkerson
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000704:Analysis of Variance; D003799:Dental Stress Analysis; D003833:Denture, Partial, Temporary; D004548:Elasticity; D006244:Hardness; D008027:Light; D008422:Materials Testing; D008689:Methacrylates; D008768:Methylmethacrylates; D011109:Polymethacrylic Acids; D011140:Polyurethanes; D013718:Tensile Strength; D014867:Water
chemical_list: D000180:Acrylic Resins; D008689:Methacrylates; D008768:Methylmethacrylates; D011109:Polymethacrylic Acids; D011140:Polyurethanes; D014867:Water; C060386:Triad resin; C029824:urethane dimethacrylate luting resin; C091347:vinyl ethyl methacrylate; C009931:poly(ethylmethacrylate); C078282:G-C Unifast LC