The Journal of Contemporary Dental Practice

Register      Login

SEARCH WITHIN CONTENT

FIND ARTICLE

Volume / Issue

Online First

Archive
Related articles

VOLUME 15 , ISSUE 1 ( January-February, 2014 ) > List of Articles

RESEARCH ARTICLE

Cuspal Movement related to Different Polymerization Protocols

Milton Carlos Kuga, Máyra Andressa Rodrigues Valinhos Piccioni, Flares Baratto-Filho, Eduardo Christiano Caregnatto de Morais, Edson Alves Campos

Citation Information : Kuga MC, Piccioni MA, Baratto-Filho F, de Morais EC, Campos EA. Cuspal Movement related to Different Polymerization Protocols. J Contemp Dent Pract 2014; 15 (1):26-28.

DOI: 10.5005/jp-journals-10024-1482

Published Online: 00-02-2014

Copyright Statement:  Copyright © 2014; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Objective

The aim of this study to investigate the effects of different polymerization protocols on the cuspal movement in class II composite restorations.

Materials and methods

Human premolar teeth were prepared with class II cavities and then restored with composite and three-step and two-step etch-and-rinse adhesive systems under different curing techniques (n = 10). It was used a lightemitting- diode curing unit and the mode of polymerization were: standard (exposure for 40 seconds at 700 mW/cm2), pulse-delay (initial exposure for 6 seconds at 350 mW/cm2 followed by a resting period of 3 minutes and a final exposure of 37 seconds at 700 mW/cm2) and soft-start curing (exposure 10 seconds at 350 mW/cm2 and 35 seconds at 700 mW/cm2). The cuspal distance (ìm) was measured before and after the restorative procedure and the difference was recorded as cuspal movement. The data were submitted to two-way ANOVA and Bonferroni test (p < 0.05).

Results

The type of adhesive system did not influenced the cuspal movement for all the curing methods. Standard protocol showed the highest values of cuspal movement and was statistically different from the pulse-delay and soft-start curing modes.

Conclusion

Although the cuspal displacement was not completely avoided, alternative methods of photocuring should be considered to minimize the clinical consequences of composites contraction stress.

How to cite this article

Piccioni MARV, Baratto-Filho F, Kuga MC, de Morais ECC, Campos EA. Cuspal Movement related to Different Polymerization Protocols. J Contemp Dent Pract 2014;15(1):26-28.


PDF Share
  1. Clinical challenges and the relevance of materials testing for posterior composite restorations. Dent Mater 2005;21(1):9-20.
  2. Developing a more complete understanding of stresses produced in dental composites during polymerization. Dent Mater 2005;21(1):36-42.
  3. Investigation of polymerisation shrinkage strain, associated cuspal movement and microleakage of MOD cavities restored incrementally with resin-based composite using an LED light curing unit. J Dent 2007;35(2):97-103.
  4. Cuspal movement related to different bonding techniques using etch-and-rinse and self-etch adhesive systems. Eur J Dent 2009;3(3):213-218.
  5. Two-step curing: influence on conversion and softening of a dental polymer. Dent Mater 2003;19(6):466-470.
  6. Effects of different photo-polymerization protocols on resin-dentine μTBS, mechanical properties and cross-link density of a nano-filled resin composite. J Dent 2012;40(10):802-809.
  7. A light-curing method for improving marginal sealing and cavity wall adaptation of resin composite restorations. Dent Mater 2001;17(4):359-366.
  8. Physical properties and gap formation of light-cured composites with and without ‘softstart’ polymerization. J Dent 1997;25(3-4):321-330.
  9. Modulated photoactivation of composite restoration: measurement of cuspal movement using holographic interferometry. Lasers Med Sci 2011;26(2):179-186.
  10. Impact of curing protocol on conversion and shrinkage stress. J Dent Res 2005;84(9):822-826.
  11. Influence of curing modes on crosslink density in polymer structures. J Dent 2004;32(4):321-326.
  12. Marginal adaptation of class V restorations with and without ‘soft-start’ polymerizatin. Oper Dent 2000;25(1):26-32.
  13. Reduction of polymerization contraction stress for dental composites by two-step light activation. Dent Mater 2002;18(6):436-444.
  14. Effect of photoactivation mode on the hardness and bond strength of methacrylate- and silorane monomer-based composites. J Adhes Dent 2013;15(1):33-39.
  15. Degree of conversion and hardness of two different systems of the Vitrebond™ Glass Ionomer Cement Light Cured with Blue LED. J Contemp Dent Pract 2013;14(2):244-249.
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.