Energy output reduction and surface alteration of quartz tips following Er:YAG laser contact irradiation on soft and hard tissues <i>in vitro </i>
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- LIN Taichen
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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- KAWAMURA Rie
- School of Dentistry, Tokyo Medical and Dental University
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- AOKI Akira
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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- ICHINOSE Shizuko
- Research Center for Medical and Dental Science, Tokyo Medical and Dental University
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- MIZUTANI Koji
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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- TANIGUCHI Yoichi
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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- EGURO Toru
- Private practice
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- SAITO Norihito
- Photonics Control Technology Team, Advanced Photonics Technology Development Group, RIKEN Center for Advanced Photonics, Riken
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- IZUMI Yuichi
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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Abstract
Though the Er:YAG laser (ErL) has been used in periodontal therapy, the irradiated tip damage has not been studied in detail. In this study, the change in the energy output, surface morphology, and temperature of quartz tips was evaluated following contact irradiation. Soft tissue, calculus on extracted human teeth, and porcine bone were irradiated by ErL for 60 min at 14.2 or 28.3 J/cm2/pulse and 20 Hz with or without water spray. The energy output ratio declined the most in the calculus group, followed by the bone and soft tissue groups with and/or without water spray. Carbon contamination was detected in all groups, and contamination by P, Ca, and/or other inorganic elements was observed in the calculus and bone groups. The rate of energy output reduction and the degree of surface alteration/contamination is variously influenced by the targeting tissue, temperature elevation of the tip and water spray.
Journal
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- Dental Materials Journal
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Dental Materials Journal 35 (1), 51-62, 2016
The Japanese Society for Dental Materials and Devices