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Quintessence Publishing: Journals: ORTHODONTICS
ORTHODONTICS
The Art and Practice of Dentofacial Enhancement

Formerly World Journal of Orthodontics

Edited by
Rafi Romano, DMD, MSc (Editor-in-Chief)

ISSN 2160-2999 (print) / ISSN 2160-3006 (online)

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Publication:
Winter 2006
Volume 7 , Issue 4

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Heat Generated by Residual Adhesive Removal After Debonding of Brackets

Erwin Jonke, MD, DDS / Frank Weiland, MD, DDS, PhD / Josef W. Freudenthaler, MD, DDS, PhD / Hans Peter Bantleon, MD, DDS, PhD

Pages: 357360
PMID: 17190228

Aim: To measure the rise in temperature during mechanical removal of residual adhesive after debonding of brackets in vitro. Methods: Different carbide burs on a high-speed handpiece were tested. Acrylic on the buccal surfaces of recently extracted human maxillary incisors was removed using 3 types of carbide burs (6-, 12-, 40-fluted) with a varying number of windings relative to the long axis of the shaft. The temperature was measured using a thermocouple probe in the pulp chamber of the extracted teeth. Results: The highest mean rise in temperature was measured using a 6-fluted bur (+9.4C, P < .001), followed by the 12-fluted bur (+6.5C, P < .001). The lowest rise in temperature (+1.2C, not significant) was seen with a 40-fluted bur. After 3 to 8 seconds of continuous grinding, the rise in temperature seems to slow down. Conclusion: The removal of residual adhesive after debonding is best performed with fine burs. If 6-fluted burs are used, a pause after 5 to 10 seconds of continuous grinding is recommended, especially in the mandibular anterior area. World J Orthod 2006;7:357360.

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