title: Reinforcement of denture base resin with short-rod glass fiber.
abstract: The present study investigated the feasibility of a high short-rod fiber content in denture base resins using polymethylmethacrylate (PMMA) powder with a small particle diameter. The effects of fiber contents on mechanical properties of composite resins were studied. A commercial denture base PMMA powder (AC; average particle size, 150 microm) and an industrial PMMA powder (MB; average particle size, 4 microm) were selected. Short-rod glass fibers were mixed with the two powders at a mass ratio of 0-50%. Flexural strengths and moduli of the mixtures were evaluated by a three-point bending test. The flexural strength of AC composites did not change regardless of fiber content, while that of MB composites increased significantly at fiber contents exceeding 40%. The flexural moduli of AC and MB composites at fiber contents exceeding 20% were significantly greater than those of AC and MB resins without short-rod glass fibers, respectively.
authors.affiliation: Complete Denture Prosthodontics, Department of Masticatory Function Rehabilitation, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-5849, Japan. m.nakamura.ore@tmd.ac.jp
authors.forename: Miho
authors.initials: M
authors.lastname: Nakamura
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Takahashi
authors.forename: Iwao
authors.initials: I
authors.lastname: Hayakawa
mesh_terms: D000704:Analysis of Variance; D003799:Dental Stress Analysis; D003819:Denture Bases; D004548:Elasticity; D005898:Glass; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D010316:Particle Size; D018583:Pliability; D019904:Polymethyl Methacrylate / Q000737:chemistry*
chemical_list: C009753:fiberglass; D019904:Polymethyl Methacrylate