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VOLUME 12 , ISSUE 4 ( July-August, 2011 ) > List of Articles

RESEARCH ARTICLE

Effect of Thermal Recycling of Metal Brackets on Shear and Tensile Bond Strength

D Praveen Kumar Varma, Y Narendranath Reddy, Anil G Kumar, KV Sujan Kumar, Surendra V Shetty

Citation Information : Varma DP, Reddy YN, Kumar AG, Kumar KS, Shetty SV. Effect of Thermal Recycling of Metal Brackets on Shear and Tensile Bond Strength. J Contemp Dent Pract 2011; 12 (4):287-294.

DOI: 10.5005/jp-journals-10024-1048

Published Online: 00-08-2011

Copyright Statement:  Copyright © 2011; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Aim

The study was undertaken to measure the changes within the mesh pad associated with reconditioning process, measure the bond strength of new and reconditioned orthodontic brackets and correlate the changes in mesh strand diameter with changes in bond strength.

Material and methods

120 clinically normal premolar teeth extracted for orthodontic reasons, were divided equally for bonding with new and recycled brackets using a no-mix type of adhesive. The mesh strand diameters of new and reconditioned brackets were evaluated with a binocular light microscope. Recycling of brackets was done using Esmadent® bracket and band reconditioner.

Results

The mesh strand diameter, tensile and shear bond strength of new and reconditioned brackets were evaluated statistically and the latter was found to show a significant reduction (p< 0.0001). However, the bond strength values of the reconditioned brackets were found to be well above the clinically required minimum.

Conclusion

Reduction in mesh strand diameter, as a result of reconditioning process, does not correlate with the change in bond strength between initial and recycled bondings.

Clinical significance

The bond strength of reconditioned brackets is adequate enough to resist the magnitude of forces generated in the mouth, throughout the duration of orthodontic treatment for successful treatment results.

How to cite this article

Reddy YN, Varma DPK, Kumar AG, Kumar KVS, Shetty SV. Effect of Thermal Recycling of Metal Brackets on Shear and Tensile Bond Strength. J Contemp Dent Pract 2011;12(4):287-294.


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  1. Effects of recycling on metalic direct bond orthodontic brackets. Am J Orthod 1980;77:654-68.
  2. Bond strength of thermally recycled metal brackets. Am J Orthod 1983;83:181-86.
  3. In vitro tensile bond strength of reconditoned brackets. Am J orthod 1985;87:247-52.
  4. The effects of recycling on the tensile bond strength of new and clinically used stainless steel brackets: An in vitro study. Br J Orthod 1990;17:137-45.
  5. Shearing strength of recycled direct bonding brackets. Am J orthod 1982:82,211-16.
  6. Pros and cons of the reuse of direct bonded appliances: Clinicians Corner. Am J orthod 1989;96:72-76.
  7. Bond strength of rebounded orthodontic brackets. Am J orthod 1996;64-70.
  8. Improvements in brackets base design. In Am J Orthod 1983;83:277-81.
  9. Factors affecting in vitro bond strength of no-mix orthodontic cements. In Am J Orthod 1985;87: 508-12.
  10. Tensile and shear bond strength of orthodontic direct bonding adhesives. In J of Dentalmate 1988;4:243-50.
  11. The tensile bond strength of new and rebounded stainless steel orthodontic brackets. In EJO 1993;15:125-35.
  12. Correlation study of incisive biting force with age and anterior occlusion. J Dent Res 1973;52:698-702.
  13. Occusal forces in normal and long face adults. Dent Res 1983;62:556-74.
  14. Direct bonding of orthodontic brackets: A comparative study of adhesives. In BJO 1976;3:143-46.
  15. Epoxy adhesives for orthodontic attachements. J Orthod 1965;51:901-12.
  16. Bond strength of thermally recycled metal brackets. Am J Orthod 1983;88:181-86.
  17. Enamel loss due to prophylaxis and multiple bonding/debonding of orthodontic attachments. Am J Orthod 1981;79:282-95.
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