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VOLUME 16 , ISSUE 4 ( April, 2015 ) > List of Articles

RESEARCH ARTICLE

Effects of Diode Laser Debonding of Ceramic Brackets on Enamel Surface and Pulpal Temperature

Soghra Yassaei, Azadeh Soleimanian, Zahra Ebrahimi Nik

Citation Information : Yassaei S, Soleimanian A, Nik ZE. Effects of Diode Laser Debonding of Ceramic Brackets on Enamel Surface and Pulpal Temperature. J Contemp Dent Pract 2015; 16 (4):270-274.

DOI: 10.5005/jp-journals-10024-1674

Published Online: 01-04-2015

Copyright Statement:  Copyright © 2015; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Aim

Debonding of ceramic brackets due to their high bond strength and low fracture toughness is one of the most challenging complications of orthodontic clinicians. Application of lasers might be effective in the debonding of ceramic brackets as they reduce bond strength of resins and, therefore, can eliminate the risk of enamel damage. However, the thermal effects of laser radiation on dental tissue can cause undesirable results. The aim of this study is to evaluate the enamel surface characteristics and pulpal temperature changes of teeth after debonding of ceramic brackets with or without laser light.

Materials and methods

Thirty polycrystalline brackets were bonded to 30 intact extracted premolars, and later debonded conventionally or through a diode laser (2.5 W, 980 nm). The laser was applied for 10 seconds with sweeping movement. After debonding, the adhesive remnant index (ARI), the lengths and frequency of enamel cracks were compared among the groups. The increase in intrapulpal temperature was also measured. The collected data were analyzed by Chi-squared test and paired t-test using Statistical Package for Social Sciences (SPSS) software.

Results

There was no case of enamel fracture in none of the groups. Laser debonding caused a significant decrease in the frequency and lengths of enamel cracks, compared to conventional debonding. In laser debonding group, the increase in intrapulpal temperature (1.46°C) was significantly below the benchmark of 5.5°C for all the specimens. No significant difference was observed in ARI scores among the groups.

Conclusion

Laser-assisted debonding of ceramic brackets could reduce the risk of enamel damage, without causing thermal damage to the pulp. However, some increases in the length and frequency of enamel cracks should be expected with all debonding methods.

How to cite this article

Yassaei S, Soleimanian A, Nik ZE. Effects of Diode Laser Debonding of Ceramic Brackets on Enamel Surface and Pulpal Temperature. J Contemp Dent Pract 2015;16(4):270-274.


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  1. Diode laser debonding of ceramic brackets. Am J Orthod Dentofac Orthop 2010;138(4):458-462.
  2. Does ultra-pulse CO2 laser reduce the risk of enamel damage during debonding of ceramic brackets? Lasers Med Sci 2012;27(3):567-574.
  3. Evaluation of the effects of CO2 laser on debonding of orthodontics porcelain brackets vs the conventional method. Lasers Med Sci 2011;26(5):563-567.
  4. Ceramic bracket debonding with ytterbium fiber laser. Lasers Med Sci 2011;26(5):577-584.
  5. Nd:YAG laser for debonding ceramic orthodontic brackets. Am J Orthod Dentofac Orthop 2005;128(5):638-647.
  6. Laser debonding of ceramic brackets: a comprehensive review. Am J Orthod Dentofac Orthop 2003;123(1):79-83.
  7. Laser-aided debonding of orthodontic ceramic brackets. Am J Orthod Dentofac Orthop 1992;101(2):152-158.
  8. Debonding of ceramic brackets by a new scanning laser method. Am J Orthod Dentofac Orthop 2010;138(2):195-200.
  9. Effects of different application durations of ER:YAG laser on intrapulpal temperature change during debonding. Lasers Med Sci 2011;26(6):735-740.
  10. Effects of CO2 laser debonding of a ceramic bracket on the mechanical properties of enamel. Angle Orthod 2010;80(6):1029-1035.
  11. Bond strengths of five different ceramic brackets: an in vitro study. Eur J Orthod 1991;13(4):293-305.
  12. Comparisons of different debonding techniques for ceramic brackets: an in vitro study. Part I— background and methods. Am J Orthod Dentofac Orthop 1990;98(2):145-153.
  13. Enamel cracks in debonded, debanded, and orthodontically untreated teeth. Am J Orthod 1980;77(3):307-319.
  14. Am J Orthod Dentofac Orthop 2008;134(4):548-555.
  15. Failure mode analysis of ceramic brackets bonded to enamel. Am J Orthod Dentofac Orthop 1993;104(1):21-26.
  16. Effect of altering the type of enamel conditioner on the shear bond strength of a resin-reinforced glass ionomer adhesive. Am J Orthod Dentofac Orthop 2000;118(3):288-294.
  17. Shear bond strength of metallic orthodontic brackets bonded to enamel prepared with Self- Etching Primer. Angle Orthod 2005;75(5):849-853.
  18. In vitro comparison of the retention capacity of new aesthetic brackets. Eur J Orthod 1999;21(1):71-77.
  19. Pulp response to externally applied heat. Oral Surg Oral Med Oral Pathol 1965;19(4):515-530.
  20. Examination of tooth pulp following laser beam irradiation. Lasers Surg Med 1987;7(3):236-239.
  21. Temperature changes measured in vivo at the dentinoenamel junction and pulpodentin junction during cavity preparation in the Macaca fascicularis monkey. J Endod 1988;14(7):336-339.
  22. Super pulse CO2 laser for bracket bonding and debonding. Eur J Orthod 1999;21(2):193-198.
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