The Journal of Contemporary Dental Practice

Register      Login



Volume / Issue

Online First

Related articles

VOLUME 9 , ISSUE 1 ( January, 2008 ) > List of Articles


Short Glass Fiber-reinforced Composite with a Semi-interpenetrating Polymer Network Matrix for Temporary Crowns and Bridges

Sufyan Garoushi, Pekka K. Vallittu, Lippo V. J. Lassila

Citation Information : Garoushi S, Vallittu PK, Lassila LV. Short Glass Fiber-reinforced Composite with a Semi-interpenetrating Polymer Network Matrix for Temporary Crowns and Bridges. J Contemp Dent Pract 2008; 9 (1):14-21.

DOI: 10.5005/jcdp-9-1-14

License: CC BY-NC 3.0

Published Online: 01-01-2008

Copyright Statement:  Copyright © 2008; Jaypee Brothers Medical Publishers (P) Ltd.



The purpose of this study was to investigate the reinforcement effect of short E-glass fiber fillers on some mechanical properties of temporary crown and bridge (TCB) composite resin with a semi-interpenetrating polymer network (semi-IPN).

Methods and Materials

Experimental temporary fiber reinforced (TFC) composite resin was prepared by mixing 15 wt% of short E-glass fibers (3 mm in length) with a 35 wt% of semi-IPN-resin (dual or chemical cure) with 50 wt% of silane treated particulate silica fillers using a high speed mixing device. Temporary crowns (n=6) and test specimens (2 × 2 × 25 mm3) (n=6) were made from the experimental TFC and conventional TCB composite (control, Protemp Garant, 3M-ESPE, St. Paul, MN, USA). A three-point bending test was done according to ISO standard 10477, and a compression loading test was carried out using a steel ball (Ø 3.0 mm) with a speed of 1.0 mm/min until fracture occurred. The degree of monomer conversion (DC%) of both composites was determined by Fourier transfer infrared (FTIR) spectrometry.


The analysis of variance (ANOVA) revealed both dual and chemical cure experimental TFC composite resins had statistically significant (p<0.05) higher flexural strengths (117 and 99 MPa, respectively) and compressive load-bearing capacity (730 and 623 N, respectively) compared to the control TCB composite resin (72 MPa, 549 N).


The use of short fiber fillers with semi-IPN polymer matrix yielded an improved mechanical performance compared to a conventional TCB composite resin.


Garoushi S, Vallittu PK, Lassila LVJ. Short Glass Fiber-reinforced Composite with a Semi-interpenetrating Polymer Network Matrix for Temporary Crowns and Bridges. J Contemp Dent Pract 2008 January; (9)1:014-021.

PDF Share
  1. Comparative in vitro evaluation of two provisional restorative materials. J Prosthet Dent 2001; 85:129-32.
  2. A new temporary crown and bridge resin. Br Dent J 1976; 141:269-72.
  3. Evaluation of resins for provisional restorations. Am J Dent 1992; 5:137-9.
  4. Temporary restorations: A review. Oper Dent 1986; 11:103-10.
  5. Marginal accuracy of provisional restoration materials. J Prosthet Dent 1990; 63:639-42.
  6. Changes in marginal gap size of provisional resin crowns after occlusal loading and thermal cycling. J Prosthet Dent 2000; 84:139-48.
  7. A review of fiber-reinforced denture base resins. J Prosthodont 1996; 5:270-76.
  8. Comparison of the in vitro fatigue resistance of acrylic resin removable partial denture reinforced with continuous glass fibers or metal wires. J Prosthodont 1996; 5:115-21.
  9. Comparison of two different silane compounds used for improving adhesion between fibers and acrylic denture base material. J Oral Rehabil 1993; 20:533-39.
  10. Impact strength of a modified continuous glass fiber-poly (methyl methacrylate). Int J Prosthodont 1997; 10:142-48.
  11. Acrylic resin-fiber composite-part I: The effect of fiber concentration on fracture resistance. J Prosthet Dent 1994; 71:607-12.
  12. Repair of acrylic resin denture base reinforced with glass fiber. J Prosthet Dent 1998; 80:546-50.
  13. Dent Mater 1993; 9:128-35.
  14. Effect of fiber position and orientation on fracture load of fiber reinforced composite. Dent Mater 2004; 20:947-55.
  15. The effect of void space and polymerization time on transverse strength of acrylic-glass fiber composite. J Oral Rehabil 1995; 22:257-61.
  16. Water sorption and solubility of glass fiber- reinforced denture polymethyl methacrylate. J Prosthet Dent 1997; 77:531-34.
  17. Handbook of plastic testing technology, 2nd ed. New York: John Wiley; 1998. pp. 546.
  18. The semi-interpenetrating polymer network matrix of fiberreinforced composite and its effect on the surface adhesive properties. J Mater Sci Mater Med. 2003; 14:803-9.
  19. Evaluation of some properties of two fiber reinforced composite materials. Acta Odonto Scand 2005; 63:196-204.
  20. Short glass fiber reinforced restorative composite resin with semi-inter penetrating polymer network matrix. Dent Mater 2007;23:1356-62.
  21. Lassila LVJ. Use of short fiber-reinforced composite with semi-interpenetrating polymer network matrix in fixed partial dentures. J Dent 2007;35:403-8.
  22. Filler particle leachability of experimental dental composites. Eur J Oral Sci 2000; 108:555-60
  23. Polymer-based crown and bridge material. Geneva: ISO; 1992.
  24. Survival rates of resin-bonded, glass fiber-reinforced composite fixed partial dentures with a mean follow-up of 42 month: A pilot study. J Prosthet Dent 2004; 91:241-46.
  25. Inlay-fixed partial dentures adhesively and reinforced by glass fiber: clinical and scanning electron microscopy analysis after five years. Eur J Oral Sci 2005; 113:60-9.
  26. Discontinuous fiber-reinforced composites above critical length. J Dent Res 2005; 84:365-70.
  27. Transverse strength and fatigue of denture acrylic-glass fiber composite. Dent Mater 1994; 10:116-21.
  28. Mechanical properties of polymer and composites. New York: Marcel Dekker; 1974.
  29. Effect of fiber conditioning on the interfacial shear strength of glassfiber composite. Compos Sci Technol 1993; 48:89-96.
  30. The effect of length and concentration of glass fibers on the mechanical properties of an injection- and a compression-molded denture base polymer. J Prosthet Dent 2003; 90:385-93.
  31. The span length and cross-section design affect values of strength. Dent Mater 2005; 21:347-53.
  32. Flexural properties of acrylic resin polymers reinforced with unidirectional and woven glass fibers. J Prosthet Dent 1999; 81:318-26.
  33. Fourier transform infrared analysis of degree of polymerization in unfilled resins-method comparison. J Dent Res 1984; 63:1093-5.
  34. The effect of filler and silane content on conversion of resin-based composite. Dent Mater 2003; 19:327-33.
  35. Polymerization shrinkage-strain kinetics of temporary crown and bridge materials. Dent Mater 2004; 20:88-95.
  36. Intrinsic soft-start polymerization shrinkage-kinetics in an acrylate-based resin composite. Dent Mater 1999;15:39-45.
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.