Skip Navigation
Skip to contents

Restor Dent Endod : Restorative Dentistry & Endodontics

Search
Advanced Search
OPEN ACCESS
mobile search button mobile menu button

Articles

Page Path
HOME > Restor Dent Endod > Volume 34(4); 2009 > Article
Original Article Effect of fiber direction on the polymerization shrinkage of fiber-reinforced composites
Joongwon Yom, In-Bog Lee
2009;34(4):-370.
DOI: https://doi.org/10.5395/JKACD.2009.34.4.364
Published online: July 31, 2009

Department of Conservative Dentistry, School of Dentistry, Seoul National University, Korea.

Corresponding Author: In-Bog Lee. Department of Conservative Dentistry, School of Dentistry, Seoul National University, 275-1 Yeongeon-Dong, Jongno-Gu, Seoul, 110-768, Korea. Tel: 82-2-2072-3953, Fax: 82-2-2072-3859, inboglee@snu.ac.kr
• Received: May 11, 2009   • Revised: May 31, 2009   • Accepted: June 25, 2009

Copyright © 2009 The Korean Academy of Conservative Dentistry

  • 124 Views
  • 1 Download
prev next
Full Article

Download PDF Download PDF

  • The aim of this study was to evaluate the effect of fiber direction on the polymerization shrinkage of fiber-reinforced composite. The disc-shaped flowable composite specimens (d = 10 mm, h = 2 mm, Aeliteflo A2, Bisco, Inc., IL, USA) with or without glass fiber bundle (X-80821P Glass Fiber, Bisco, Inc., IL, USA) inside were prepared, and the longitudinal and transversal polymerization shrinkage of the specimens on radial plane were measured with strain gages (Linear S-series 350ω, CAS, Seoul, Korea). In order to measure the free polymerization shrinkage of the flowable composite itself, the disc-shaped specimens (d = 7 mm, h = 1 mm) without fiber were prepared, and the axial shrinkage was measured with an LVDT (linear variable differential transformer) displacement sensor. The cross-section of the polymerized specimens was observed with a scanning electron microscope to examine the arrangement of the fiber bundle in composite. The mean polymerization shrinkage value of each specimen group was analyzed with ANOVA and Scheffe post-hoc test (α=0.05).
    The radial polymerization shrinkage of fiber-reinforced composite was decreased in the longitudinal direction of fiber, but increased in the transversal direction of fiber (p<0.05). We can conclude that the polymerization shrinkage of fiber-reinforced composite splint or restoratives is dependent on the direction of fiber.
  • Keywords: fiber-reinforced composite; longitudinal direction; transversal direction; polymerization shrinkage; strain gage; linear variable differential transformer
Figure 1
a) Experimental setup for the measurement of radial linear shrinkage using a strain gage.
b) Definition of directions on a disc shaped specimen in the measurement.
jkacd-34-364-g001.jpg
Figure 2
Electric circuit design for the strain measurement (Vo: output voltage, Va: voltage between two fixed resistances, Vb: voltage between two strain gages, Vs: input voltage, R: fixed resistance, ΔR: resistance difference, SG: strain gage).
jkacd-34-364-g002.jpg
Figure 3
Experimental setup for the measurement of axial linear shrinkage using an LVDT probe.
jkacd-34-364-g003.jpg
Figure 4
a) Representative curves of radial shrinkage strains for composite specimens as a function of time.
b) Post-gel shrinkage strains for four groups.
jkacd-34-364-g004.jpg
Figure 5
SEM photomicrographs showing the cross-section of composite specimens.
a) Some voids were observed between fibers. The arrows show fiber bundles (F).
b) There was an intimate contact between the strain gage and composite. The arrow shows the strain gage (SG).
jkacd-34-364-g005.jpg
Table 1
Post-gel radial shrinkage strain measured using a strain gage for composite specimens at 600 s.

*Superscript letters mean statistically significant difference.

jkacd-34-364-i001.jpg
  • 1. Giachetti L, Scaminaci Russo D, Bambi C, Grandini R. A review of polymerization shrinkage stress: current techniques for posterior direct resin restorations. J Contemp Dent Pract. 2006;7: 79-88.Article
  • 2. Vallittu PK, Lassila VP, Lappalainen R. Acrylic resin-fiber composite-Part I: The effect of fiber concentration on fracture resistance. J Prosthet Dent. 1994;71: 607-612.ArticlePubMed
  • 3. Vallittu PK. Acrylic resin-fiber composite--Part II: The effect of polymerization shrinkage of polymethyl methacrylate applied to fiber roving on transverse strength. J Prosthet Dent. 1994;71: 613-617.ArticlePubMed
  • 4. Goldberg AJ, Burstone CJ. The use of continuous fiber reinforcement in dentistry. Dent Mater. 1992;8: 197-202.ArticlePubMed
  • 5. Butterworth C, Ellakwa AE, Shortall A. Fibre-reinforced composites in restorative dentistry. Dent Update. 2003;30: 300-306.ArticlePubMed
  • 6. Dyer SR, Lassila LV, Jokinen M, Vallittu PK. Effect of cross-sectional design on the modulus of elasticity and toughness of fiber-reinforced composite materials. J Prosthet Dent. 2005;94: 219-226.ArticlePubMed
  • 7. Tezvergil A, Lassila LV, Vallittu PK. The effect of fiber orientation on the polymerization shrinkage strain of fiber-reinforced composites. Dent Mater. 2006;22: 610-616.ArticlePubMed
  • 8. Sakaguchi RL, Versluis A, Douglas WH. Analysis of strain gage method for measurement of post-gel shrinkage in resin composites. Dent Mater. 1997;13: 233-239.ArticlePubMed
  • 9. Versluis A, Tantbirojn D, Douglas WH. Distribution of transient properties during polymerization of a light-initiated restorative composite. Dent Mater. 2004;20: 543-553.ArticlePubMed
  • 10. Lassila LV, Vallittu PK. The effect of fiber position and polymerization condition on the flexural properties of fiber-reinforced composite. J Contemp Dent Pract. 2004;5: 14-26.Article
  • 11. Lee IB, Cho BH, Son HH, Um CM, Lim BS. The effect of consistency, specimen geometry and adhesion on the axial polymerization shrinkage measurement of light cured composites. Dent Mater. 2006;22: 1071-1079.ArticlePubMed
  • 12. Sakaguchi RL, Wiltbank BD, Shah NC. Critical configuration analysis of four methods for measuring polymerization shrinkage strain of composites. Dent Mater. 2004;20: 388-396.ArticlePubMed

Tables & Figures

Figure 1
a) Experimental setup for the measurement of radial linear shrinkage using a strain gage.
b) Definition of directions on a disc shaped specimen in the measurement.
jkacd-34-364-g001.jpg
Figure 2
Electric circuit design for the strain measurement (Vo: output voltage, Va: voltage between two fixed resistances, Vb: voltage between two strain gages, Vs: input voltage, R: fixed resistance, ΔR: resistance difference, SG: strain gage).
jkacd-34-364-g002.jpg
Figure 3
Experimental setup for the measurement of axial linear shrinkage using an LVDT probe.
jkacd-34-364-g003.jpg
Figure 4
a) Representative curves of radial shrinkage strains for composite specimens as a function of time.
b) Post-gel shrinkage strains for four groups.
jkacd-34-364-g004.jpg
Figure 5
SEM photomicrographs showing the cross-section of composite specimens.
a) Some voids were observed between fibers. The arrows show fiber bundles (F).
b) There was an intimate contact between the strain gage and composite. The arrow shows the strain gage (SG).
jkacd-34-364-g005.jpg
Table 1
Post-gel radial shrinkage strain measured using a strain gage for composite specimens at 600 s.

*Superscript letters mean statistically significant difference.

jkacd-34-364-i001.jpg

REFERENCES

  • 1. Giachetti L, Scaminaci Russo D, Bambi C, Grandini R. A review of polymerization shrinkage stress: current techniques for posterior direct resin restorations. J Contemp Dent Pract. 2006;7: 79-88.Article
  • 2. Vallittu PK, Lassila VP, Lappalainen R. Acrylic resin-fiber composite-Part I: The effect of fiber concentration on fracture resistance. J Prosthet Dent. 1994;71: 607-612.ArticlePubMed
  • 3. Vallittu PK. Acrylic resin-fiber composite--Part II: The effect of polymerization shrinkage of polymethyl methacrylate applied to fiber roving on transverse strength. J Prosthet Dent. 1994;71: 613-617.ArticlePubMed
  • 4. Goldberg AJ, Burstone CJ. The use of continuous fiber reinforcement in dentistry. Dent Mater. 1992;8: 197-202.ArticlePubMed
  • 5. Butterworth C, Ellakwa AE, Shortall A. Fibre-reinforced composites in restorative dentistry. Dent Update. 2003;30: 300-306.ArticlePubMed
  • 6. Dyer SR, Lassila LV, Jokinen M, Vallittu PK. Effect of cross-sectional design on the modulus of elasticity and toughness of fiber-reinforced composite materials. J Prosthet Dent. 2005;94: 219-226.ArticlePubMed
  • 7. Tezvergil A, Lassila LV, Vallittu PK. The effect of fiber orientation on the polymerization shrinkage strain of fiber-reinforced composites. Dent Mater. 2006;22: 610-616.ArticlePubMed
  • 8. Sakaguchi RL, Versluis A, Douglas WH. Analysis of strain gage method for measurement of post-gel shrinkage in resin composites. Dent Mater. 1997;13: 233-239.ArticlePubMed
  • 9. Versluis A, Tantbirojn D, Douglas WH. Distribution of transient properties during polymerization of a light-initiated restorative composite. Dent Mater. 2004;20: 543-553.ArticlePubMed
  • 10. Lassila LV, Vallittu PK. The effect of fiber position and polymerization condition on the flexural properties of fiber-reinforced composite. J Contemp Dent Pract. 2004;5: 14-26.Article
  • 11. Lee IB, Cho BH, Son HH, Um CM, Lim BS. The effect of consistency, specimen geometry and adhesion on the axial polymerization shrinkage measurement of light cured composites. Dent Mater. 2006;22: 1071-1079.ArticlePubMed
  • 12. Sakaguchi RL, Wiltbank BD, Shah NC. Critical configuration analysis of four methods for measuring polymerization shrinkage strain of composites. Dent Mater. 2004;20: 388-396.ArticlePubMed

Citations

Citations to this article as recorded by  
    CanvasJS.com

    • ePub LinkePub Link
    • Cite
      CITE
      export Copy Download
      Close
      Download Citation
      Download a citation file in RIS format that can be imported by all major citation management software, including EndNote, ProCite, RefWorks, and Reference Manager.
      Format:
      • RIS — For EndNote, ProCite, RefWorks, and most other reference management software
      • BibTeX — For JabRef, BibDesk, and other BibTeX-specific software
      Include:
      • Citation for the content below
      Effect of fiber direction on the polymerization shrinkage of fiber-reinforced composites
      J Korean Acad Conserv Dent. 2009;34(4):364-370.   Published online July 31, 2009
      DOI: https://doi.org/10.5395/JKACD.2009.34.4.364
      Close
    • XML DownloadXML Download
    Figure
    • 0
    Related articles
    Effect of fiber direction on the polymerization shrinkage of fiber-reinforced composites
    Image Image Image Image Image
    Figure 1 a) Experimental setup for the measurement of radial linear shrinkage using a strain gage. b) Definition of directions on a disc shaped specimen in the measurement.
    Figure 2 Electric circuit design for the strain measurement (Vo: output voltage, Va: voltage between two fixed resistances, Vb: voltage between two strain gages, Vs: input voltage, R: fixed resistance, ΔR: resistance difference, SG: strain gage).
    Figure 3 Experimental setup for the measurement of axial linear shrinkage using an LVDT probe.
    Figure 4 a) Representative curves of radial shrinkage strains for composite specimens as a function of time. b) Post-gel shrinkage strains for four groups.
    Figure 5 SEM photomicrographs showing the cross-section of composite specimens. a) Some voids were observed between fibers. The arrows show fiber bundles (F). b) There was an intimate contact between the strain gage and composite. The arrow shows the strain gage (SG).

    Figure 1

    Figure 2

    Figure 3

    Figure 4

    Figure 5

    Effect of fiber direction on the polymerization shrinkage of fiber-reinforced composites

    Post-gel radial shrinkage strain measured using a strain gage for composite specimens at 600 s.

    *Superscript letters mean statistically significant difference.
    Table 1 Post-gel radial shrinkage strain measured using a strain gage for composite specimens at 600 s.

    *Superscript letters mean statistically significant difference.

    Table 1

    Restor Dent Endod : Restorative Dentistry & Endodontics
    © The Korean Academy of Conservative Dentistry.
    Close layer
    TOP Mpgyi