International Journal of Prosthodontics and Restorative Dentistry

Register      Login

VOLUME 2 , ISSUE 1 ( January-March, 2012 ) > List of Articles


Evaluation of Microleakage in Class V Composite Restoration using Different Techniques of Polymerization

Anshu Milind Chandurkar, Sandeep S Metgud, Shaikh S Yakub, Vaishali J Kalburge

Citation Information : Chandurkar AM, Metgud SS, Yakub SS, Kalburge VJ. Evaluation of Microleakage in Class V Composite Restoration using Different Techniques of Polymerization. Int J Prosthodont Restor Dent 2012; 2 (1):10-15.

DOI: 10.5005/jp-journals-10019-1039

Published Online: 01-09-2014

Copyright Statement:  Copyright © 2012; The Author(s).



The purpose of this study was to evaluate the effect of light intensity and curing cycle of quartz tungsten halogen (QTH) and plasma arc curing (PAC) lights on the microleakage of class V composite restorations.

Materials and methods

A total of 60 freshly extracted human maxillary premolars were used for this study. Standardized class V cavities were prepared and restored with microhybrid resin composite. According to the curing protocol, the teeth were then divided into three groups (n = 20): QTH curing (standard and soft start mode) and PAC high intensity irradiation.

  The microleakage was evaluated by immersion of the samples in 50% silver nitrate solution. The samples were then sectioned, evaluated under a stereomicroscope and scored for microleakage.

Statistical analysis used

Dye leakage scores were obtained, and analysis was done using Student's t-test.


Light curing with QTH light in the soft start mode, showed the least leakage in the composite restoration, which was highly significant when compared with the other groups (p < 0.01). Light curing with QTH light in the standard mode, showed moderate microleakage, which was statistically significant (p < 0.05), when compared with the PAC high intensity curing. Curing with PAC light in high intensity mode resulted in severe microleakage along the cavity margins.


Within the limitations of the study, it may be concluded that:

1. The high intensity PAC light resulted in maximum leakage, when compared to the other groups in the study.

2. The soft start polymerization mode offers a distinctive advantage over the standard curing protocol, in terms of microleakage, for the QTH curing lights.

Clinical significance

In the clinical scenario, soft start curing regimen offers a distinctive advantage over the conventional mode of the QTH curing and the high intensity rapid curing offered by the PAC light.

How to cite this article

Chandurkar AM, Metgud SS, Yakub SS, Kalburge VJ. Evaluation of Microleakage in Class V Composite Restoration using Different Techniques of Polymerization. Int J Prosthodont Restor Dent 2012;2(1): 10-15.

PDF Share
  1. Setting stress in composite resin in relation to configuration of the restoration. J Dent Res 1987;66:1636-39.
  2. Resin composites in dentistry: The monomer systems. Eur J Oral Sci 1997;105:97-116.
  3. The competition between the composite-dentin bond strength and the polymerization contraction stress. J Dent Res 1984;63:1396-99.
  4. Polymerization shrinkage and elasticity of flowable composites and filled adhesives. Dent Mater 1999;15:128-37.
  5. Marginal adaptation of a restorative resin polymerized at reduced rate. Scand J Dent Res 1991;99:440-44.
  6. Contemporary issues in photocuring. Compend Contin Educ Dent 1999;20:4-15.
  7. The effect of the pulse-delay cure technique on residual strain in composites. Compend Contin Educ Dent 1999;20(2 Suppl):S4-14.
  8. Marginal adaptation of class V restorations with and without soft start polymerization. Oper Dent 2000;25:26-32.
  9. Physical properties and gap formation of light cured composites with and without soft start polymerization. Oper Dent 1997;25:321-30.
  10. Novel approach to measure composite conversion kinetics during exposure with stepped or continuous light curing. J Esthet Dent 1999;11:197-205.
  11. Characterization of resin composites polymerized with plasma arc curing units. Dent Mater 2000;16:330-36.
  12. Effect of different intensity light curing modes on microleakage of two resin composite restorations. Oper Dent 2003;28:642-46.
  13. Post-gel shrinkage measurements by means of strain gauges. J Dent Res 1993;72: 386-87.
  14. Microleakage and resin-to-dentin interface morphology of pre-etching versus self-etching adhesive systems. Open Dent J 2008;2:120-25.
  15. Bonding of self etch and total etch adhesives to caries affected dentin. Oper Dent 2000;25;163-69.
  16. Bonding of self etch and total etch adhesives to carious dentin. J Dent Res 2002;81:556-60.
  17. Thermal expansion coefficient of dental composites measured with strain gauges. Dent Mater 1996;12:290-94.
  18. Properties used to characterize materials. In: Applied Dental Materials, (8th ed). Oxford: Blackwell Science 1998;4-28.
  19. Microleakage of class II restorations with different tracers-comparison with SEM quantitative analysis. J Adhes Dent 2008;10:259-67.
  20. Systematic Reviews: (1) The correlation between laboratory tests on marginal quality and bond strength. (2) The correlation between marginal quality and clinical outcome. J Adhes Dent 2007;9(Suppl 1):77-106.
  21. Insuffucient cure under the condition of high irradiance and short irradiation time. Dent Mater 2009;25:283-89.
  22. In vitro posterior composite polymerization recovery following hygroscopis expansion. J Oral Rehab 1993; 20:495-99.
  23. Polymerization shrinkage and microleakage. In: Vanherle G, Smith DC (Eds). Posterior composite resin dental restorative materials. Utrecht, the Netherlands: Peter Szulc Publishing Co 1985;243-62.
  24. Strain gauge method for measuring polymerization contraction of composite restoratives. J Dent 1991;19:312-16.
  25. Step-cure polymerization: Effect of initial light intensity on resin/dentin bond strength in class I cavities. Oper Dent 2006;31:324-31.
  26. Volume of the internal gap formed under composite restorations in vitro. J Dent 1997;25:305-12.
  27. Influence of light intensity on polymerization shrinkage and integrity of restoration-cavity interface. Eur J Oral Sci 1995;103:322-26.
  28. A light curing method for improving marginal sealing and cavity wall adaptation of resin composite restorations. Dent Mater 2001;17:359-66.
  29. Effects of soft-start irradiation on the depth of cure and marginal adaptation to dentin. Oper Dent 2001;26:389-95.
  30. Soft-start polymerization and marginal gap formation in vitro. Am J Dent 2001;14: 145-47.
  31. Setting stress in composite resin for two different curing modes. Dent Mater 1993;9:2-5.
PDF Share
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.