Journal of Korean Dental Science

  • 제14권2호
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  • Pages.69-78
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  • 2021
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  • 2005-4742(pISSN)
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  • 2713-7651(eISSN)
대한치의학회 (Korean Academy of Dental Science)
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Comparison of Temperatures of the Resin Cement in Polycrystalline Ceramic Brackets Irradiated Using a Diode Laser

  • Son, Young-Tak (Department of Dental Science, Graduate School, Kyungpook National University) ;
  • Son, KeunBaDa (Department of Dental Science, Graduate School, Kyungpook National University) ;
  • Kim, Kyung-Min (Department of Orthodontics, School of Dentistry, Kyungpook National University) ;
  • Lee, Jae-Mok (Department of Periodontology, School of Dentistry, Kyungpook National University) ;
  • Kim, Jin-Wook (Department of Oral and Maxillofacial Surgery, School of Dentistry, Kyungpook National University) ;
  • Yu, Wonjae (Department of Orthodontics, School of Dentistry, Kyungpook National University) ;
  • Lee, Kyu-Bok (Department of Dental Science, Graduate School, Kyungpook National University)
  • 투고 : 2021.05.17
  • 심사 : 2021.08.11
  • 발행 : 2021.12.30
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초록

Purpose: The primary objective of this study was to evaluate the change in the temperature of the adhesive resin in polycrystalline ceramic brackets irradiated using a diode laser at different irradiation energy levels and times. Materials and Methods: For the measurement of the temperature of the adhesive resin, it was applied at the base of the ceramic bracket, a thermocouple was placed at the center of the base surface, the bracket was placed on prepared resin specimens for light curing, and a laser was irradiated to the center of the bracket slot at 5, 7, and 10 W. For the measurement of the temperatures of the enamel under the bracket and pulp cavity, extracted premolar was fixed to a prepared mold and the ceramic bracket was bonded to the buccal surface of the premolar. The Kruskal-Wallis H test and Friedman test were used for statistical analysis. Result: At 5 W, the temperature of the adhesive resin did not reach the resin softening temperature of 200℃ within 30 seconds. At 7 W, it reached 200℃ when the ceramic bracket was irradiated continuously for 28 seconds. At 10 W, it reached 200℃ when the ceramic bracket was irradiated continuously for 15 seconds. During laser irradiation, the temperature of the enamel under the bracket increased by over 5℃ within 15 seconds. Conclusion: The use of diode laser irradiation for bracket debonding should be carefully considered because the pulp cavity temperature increases by over 5℃ within the irradiation time for resin thermal softening.

키워드

과제정보

This research was financially supported by the Ministry of Trade, Industry, and Energy as well as the Korea Institute for Advancement of Technology through the National Innovation Cluster R&D Program (P0015338_Development of Laser Handpiece Package to Stabilize System Optimized for Clinical Environment and Obtain Overseas Certification).

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