title: Flexural properties of three kinds of experimental fiber-reinforced composite posts.
abstract: The aim of this study was to estimate the flexural properties of three kinds of experimental fiber-reinforced composite (FRC) posts and to evaluate their potential use as posts. Experimental FRC posts were fabricated with glass, aramid, and UHMWP fibers. Commercial FRC posts were used for comparison. A three-point bending test was performed at a crosshead speed of 1 mm/min. Experimental glass fiber posts showed significantly higher flexural strengths and moduli than aramid and UHMWP posts. Experimental UHMWP posts demonstrated superior toughness to the commercial posts. The glass fiber posts displayed stiff, strong and brittle features, while the UHMWP posts were flexible, weak and ductile. The flexural properties of the aramid posts fell between those of the glass and UHMWP posts. In conclusion, the glass fiber posts proved excellent in flexural strengths and moduli. However, the superior toughness of UHMWP fibers suggests the possibility of their use as posts in combination with glass fibers.
authors.affiliation: Department of Dental Biomaterials and Bioengineering, Dental College, Yonsei University, 250 Seongsanno, Seodaemun-gu, Seoul 120-752, Korea.
authors.forename: Mi-Joo
authors.initials: MJ
authors.lastname: Kim
authors.forename: Won-Chang
authors.initials: WC
authors.lastname: Jung
authors.forename: Seunghan
authors.initials: S
authors.lastname: Oh
authors.forename: Masayuki
authors.initials: M
authors.lastname: Hattori
authors.forename: Masao
authors.initials: M
authors.lastname: Yoshinari
authors.forename: Eiji
authors.initials: E
authors.lastname: Kawada
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Oda
authors.forename: Ji-Myung
authors.initials: JM
authors.lastname: Bae
mesh_terms: D003188:Composite Resins / Q000737:chemistry*; D017267:Dental Prosthesis Design; D003793:Dental Restoration, Permanent / Q000295:instrumentation; D003799:Dental Stress Analysis; D055119:Elastic Modulus; D005898:Glass / Q000737:chemistry; D008422:Materials Testing; D018583:Pliability; D011095:Polyethylenes / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D011176:Post and Core Technique / Q000295:instrumentation*; D013314:Stress, Mechanical
chemical_list: D003188:Composite Resins; C039578:Kevlar Aramid fibers; D011095:Polyethylenes; D011108:Polymers; C009753:fiberglass