[Home ] [Archive]    
:: Main :: About :: Current Issue :: Archive :: Search :: Submit ::
:: Volume 24, Issue 2 (4-2012) ::
J Islam Dent Assoc Iran 2012, 24(2): 21-27 Back to browse issues page
Effect of Fiber Position and Orientation on Flexural Strength of Fiber-Reinforced Composite
Ramin Mosharraf * 1, Pirooz Givechian2
1- Associate Professor, Department of Prosthodontics , School of Dentistry, Isfahan University of Medical Sciences. Isfahan , Iran , mosharraf@dnt.mui.ac.ir
2- Postgraduate student, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences. Isfahan, Iran
Abstract:   (7620 Views)
   Background and Aim : One of the most important factors for increasing flexural strength of fiber-reinforced composite (FRC) restorations is the orientation, volume and geometry of reinforcement fibers. The aim of this study was to determine the effect of fiber position and orientation on the flexural strength of FRC specimens .

Materials and Methods : In this experimental-laboratory study, five groups (N=8) of test specimens made of one indirect composite were reinforced with pre-impregnated fibers in different positions, orientations or geometry into the rectangle cube specimens (3×3×25mm3). The control group did not contain fiber reinforcement. The test specimens were stored in distilled water for 1 week at 37 ° C before testing in a three-point loading test with 1mm/min cross head speed. Data were statistically analyzed at 0.05 significance level with Kruskal-Wallis and Mann-Whitney tests .

Results: The mean flexural strength of six experimental groups had significant differences (p1=0.005 and p2 < 0.001). The control group showed the lowest initial and final values. The maximum initial flexural strength was seen in the tension group (76.2 MPa) and the maximum final flexural strength was seen in the middle horizontal group (173.9 MPa).

Conclusion : Within the limitations of this study, it may be concluded that the position and orientation of the fibers influenced the flexural strength of the fiber-reinforced composites and the most effective position of the fibers was tension side reinforcement .


Keywords: Composite resins, Dental materials, Materials failure analysis, Testing, Materials
Full-Text [PDF 367 kb]   (2304 Downloads)    
Type of Study: Orginal | Subject: Porosthodontics
1. Dyer SR, Lassila LV, Jokinen M, Vallittu PK. Effect of fiber position and orientation on frac-ture load of fiber-reinforced composite. Dent Mater. 2004 Dec; 20(10):947-55.
2. Vallittu PK, Sevelius C. Resin-bonded, glass fiber-reinforced composite fixed partial den-tures: A clinical study. J Prosthet Dent. 2000 Oct; 84 (4):413-8.
3. Butterworth C, Ellakwa AE, Shortall A. Fiber-reinforced composites in restorative dentistry. Dent Update. 2003 Jul-Aug; 30(6):300-6.
4. Goehring TN, Peters OA, Lutz F. Marginal adaptation of inlay-retained adhesive fixed par-tial dentures after mechanical and thermal stress: an in vitro study. J Prosthet Dent. 2001 Jul; 86 (1):81-92.
5. Kilfoil BM, Hesby RA, Pelleu GB Jr. The ten-sile strength of a composite resin reinforced with carbon fibers. J Prosthet Dent. 1983 Jul; 50(1): 40-3
6. Mallick PK. Fiber-reinforced composites. Ma-terials, manufacturing, and designs. 2nd ed. New York: Marcel Decker; 1993, 1.
7. Al-Darwish M, Hurley RK, Drummond JL. Flexure strength evaluation of a laboratory-processed fiber-reinforced composite resin. J Prosthet Dent. 2007 May; 97(5):266-70.
8. Lassila LV, Nohrström T, Vallittu PK. The influence of short-term water storage on the flexural properties of unidirectional glass fiber-reinforced composites. Biomaterials 2002 May; 23(10):2221-9.
9. Ellakwa AE, Shortall AC, Shehata MK, Mar-quis PM. The influence of fiber placement and position on the efficiency of reinforcement of fiber reinforced composite bridgework. J Oral Rehabil. 2001 Aug; 28(8):785-91.
10. DeBoer J, Vermilyea SG, Brady RE. The effect of carbon fiber orientation on the fatigue resistance and bending properties of two den-ture resins. J Prosthet Dent. 1984 Jan; 51(1):119-21.
11. Behr M, Rosentritt M, Leibrock A, Schnei-der-Feyrer S, Handel G. In vitro study of frac-ture strength and marginal adaptation of fiber-reinforced adhesive fixed partial inlay dentures. J Dent. 1999 Feb; 27(2):163-8.
12. Lassila LVJ, Vallittu PK. The Effect of Fiber Position and Polymerization Condition on the Flexural Properties of Fiber-Reinforced Compo-site. J Contemp Dent Pract. 2004 May; 15:5(2):14-26.
13. Ellakwa AE, Shortall AC, Shehata MK, Marquis PM. Influence of bonding agent com-position on flexural properties of an Ultra-High Molecular Weight Polyethylene Fiber-Reinforced Composite. Oper Dent. 2002 Mar-Apr; 27(2): 184-91.
14. Vallittu PK. Effect of some properties of metal strengtheners on the fracture resistance of acrylic denture base material construction. J Oral Rehabil. 1993 May; 20(3):241-8.
15. Dyer SR, Sorensen JA, Lassila VJL, Vallittu PK. Damage mechanics and load failure of fi-ber reinforced composite fixed partial dentures. Dent Mater. 2005 Dec; 21(12):1104-10.
16. Shortall AC, Uctasli S, Marquis PM.Fracture resistance of anterior, posterior and universal light activated composite restoratives.Oper Dent. 2001 Jan-Feb; 26(1):87-96.
17. vanHeumen CC, Kreulen CM, Bronkhorst EM, Lesaffre E, Creugers NH.Fiber-reinforced dental composites in beam testing. Dent Mater. 2008 Nov; 24(11):1435-43.
18. Chung K, Lin T, Wang F.Flexural strength of a provisional resin material with fibre addition. J Oral Rehabil. 1998 Mar; 25(3):214-7.
19. Turkaslan S, Tezvergil-Mutluay A, Bagis B, Pekka K, Vallittu PK, Lassila VJ. Effect of fi-ber-reinforced composites on the failure load and failure mode of composite veneers. Dent Mater. 2009;28:530-6.
20. Nandini S. Indirect resin composites. J Con-serv Dent. 2010 Oct-Dec; 13(4):184-94.
Send email to the article author

Add your comments about this article
Your username or Email:


XML     Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Mosharraf R, Givechian P. Effect of Fiber Position and Orientation on Flexural Strength of Fiber-Reinforced Composite. J Islam Dent Assoc Iran. 2012; 24 (2) :21-27
URL: http://jidai.ir/article-1-1198-en.html

Volume 24, Issue 2 (4-2012) Back to browse issues page
Journal of Islamic Dental Association of Iran


This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly

Persian site map - English site map - Created in 0.07 seconds with 32 queries by YEKTAWEB 4162