title: Fiber-reinforced dental composites in beam testing.
abstract: OBJECTIVE
  The purpose of this study was to systematically review current literature on in vitro tests of fiber-reinforced composite (FRC) beams, with regard to studies that followed criteria described in an International Standard. The reported reinforcing effects of various fibers on the flexural strength and elastic modulus of composite resin beams were analyzed.
  
  
  METHODS
  Original, peer reviewed papers, selected using Medline from 1950 to 2007, on in vitro testing of FRC beams in comparison to non-reinforced composite beams. Also information from conference abstracts (IADR) was included.
  
  
  METHODS
  With the keywords (fiber or fibre) and (resin or composite) and (fixed partial denture or FPD), the literature search revealed 1427 titles. Using this strategy a broad view of the clinical and non-clinical literature on fiber-reinforced FPDs was obtained. Restricting to three-point bending tests, 7 articles and 1 abstract (out of 126) were included. Finally, the data of 363 composite beams were analyzed. The differences in mean flexural strength and/or modulus between reinforced and unreinforced beams were set out in a forest plot. Meta-regression analyses were performed (single and multiple regression models).
  
  
  CONCLUSIONS
  Under specific conditions we have been able to show that fibers do reinforce resin composite beams. The flexural modulus not always seems to increase with polyethylene-reinforcement, even when fibers are located at the tensile side. Besides, fiber architecture (woven vs. unidirectional) seems to be more important than the type of fiber for flexural strength and flexural modulus.
authors.affiliation: Department of Oral Function and Prosthetic Dentistry, College of Dental Science, University Medical Centre Nijmegen, Nijmegen, Netherlands. c.vanheumen@dent.umcn.nl
authors.forename: Céleste C M
authors.initials: CC
authors.lastname: van Heumen
authors.forename: Cees M
authors.initials: CM
authors.lastname: Kreulen
authors.forename: Ewald M
authors.initials: EM
authors.lastname: Bronkhorst
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Lesaffre
authors.forename: Nico H J
authors.initials: NH
authors.lastname: Creugers
mesh_terms: D003188:Composite Resins / Q000737:chemistry; D003799:Dental Stress Analysis; D003830:Denture, Partial, Fixed; D004548:Elasticity; D005898:Glass; D006801:Humans; D008422:Materials Testing; D018583:Pliability; D011095:Polyethylenes
chemical_list: D003188:Composite Resins; D011095:Polyethylenes; C009753:fiberglass