title: The effect of placement of glass fibers and aramid fibers on the fracture resistance of provisional restorative materials.
abstract: The fracture resistance of provisional restorations is an important concern for the restorative dentist. The fracture resistance of a material is directly related to its transverse strength. Six specimens of similar dimensions were prepared from three resins (PMMA, PEMA and BIS acryl-composite). The resins were reinforced with glass and aramid fibers. The samples were tested immediately after the material set, following seven days of wet storage using three-point compression loading. The results were analyzed with an analysis of variance (ANOVA). Fracture resistance of the specimens was statistically different (p < 0.001) among the materials. Specimens reinforced with glass fibers showed higher transverse strength (149.82 MPa). The fiber reinforcement of resin materials increased the strength values (20-50%). Within the limitations of this study, the transverse strengths of PMMA, PEMA and BIS acryl-resin composites were improved after reinforcement with glass and aramid fibers.
authors.affiliation: Department of Prosthodontics, Hacettepe University, Faculty of Dentistry, Ankara, Turkey. sahmali@isbank.net.tr
authors.forename: Gülbin
authors.initials: G
authors.lastname: Saygili
authors.forename: Sevil M
authors.initials: SM
authors.lastname: Sahmali
authors.forename: Figen
authors.initials: F
authors.lastname: Demirel
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D019245:Compressive Strength; D003764:Dental Materials / Q000737:chemistry*; D019232:Dental Restoration Failure; D003794:Dental Restoration, Temporary; D005898:Glass / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008768:Methylmethacrylates / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D019904:Polymethyl Methacrylate / Q000737:chemistry; D012821:Silanes / Q000737:chemistry; D013223:Statistics as Topic; D013314:Stress, Mechanical; D013997:Time Factors; D014867:Water / Q000737:chemistry; D016474:Weight-Bearing
chemical_list: D000180:Acrylic Resins; D003188:Composite Resins; D003764:Dental Materials; C039578:Kevlar Aramid fibers; D008768:Methylmethacrylates; D011108:Polymers; D012821:Silanes; C009753:fiberglass; D014867:Water; C069716:Jet, dental resin; D017438:Bisphenol A-Glycidyl Methacrylate; C009931:poly(ethylmethacrylate); D019904:Polymethyl Methacrylate; C069714:Protemp