Temperature generation and transmission in root dentin during Nd:YAG laser irradiation for preventive purposes
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , |
Tipo de documento: | Artigo de conferência |
Título da fonte: | Repositório Institucional do IPEN |
Texto Completo: | http://200.136.52.105/handle/123456789/31681 |
Resumo: | High-intensity lasers are widely used in dental procedures and the heating produced on the surface is necessary to ensure protective activity against the development of caries and erosion lesions. However, caution should be exercised regarding the spread of heat to the pulp, periodontal tissue and alveolar bone, which can cause harm to these tissues. This study sought to evaluate the generation and transmission of heat in the root dentin and adjacent tissues during irradiation with Nd:YAG laser for preventive activity. For that, 15 lower incisor human teeth had an area of 9 mm2 of root dentin irradiated with Nd:YAG laser (??=1.064 ??m, 10 Hz, 60 mJ/pulse, 84.9 J/cm2) for 30s. During irradiations, pulpal temperature was evaluated by fast-response thermocouples, while surface temperature and heat distribution on surrounding tissues were measured by infrared thermography. It was observed a mean surface temperature increase of 293.48??30.6?? C in root dentin surface, and 15.85 ?? 39.6?? C below the irradiated area, 11.72 ?? 8.7?? C above the irradiated area, 19.77 ?? 4.9?? C at 1 cm laterally and 7.03 ?? 2.7?? C at 2 cm laterally to the irradiated area. The mean pulpal temperature augment registered was 6.5??1.4?? C. It can be concluded that Nd:YAG laser irradiation promoted surface temperature rises that suggest chemical changes on dentin; however, the temperature increases generated in the adjacent tissues (region of periodontal ligament) and in the pulp chamber may be dangerous in future clinical application considering the irradiation time of 30 s made in this study. Therefore, this laser protocol can be used as long as the irradiation time is reduced in future studies. |
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2020-12-18T18:42:14Z2020-12-18T18:42:14ZOctober 26-30, 2020http://200.136.52.105/handle/123456789/316810000-0001-7404-9606High-intensity lasers are widely used in dental procedures and the heating produced on the surface is necessary to ensure protective activity against the development of caries and erosion lesions. However, caution should be exercised regarding the spread of heat to the pulp, periodontal tissue and alveolar bone, which can cause harm to these tissues. This study sought to evaluate the generation and transmission of heat in the root dentin and adjacent tissues during irradiation with Nd:YAG laser for preventive activity. For that, 15 lower incisor human teeth had an area of 9 mm2 of root dentin irradiated with Nd:YAG laser (??=1.064 ??m, 10 Hz, 60 mJ/pulse, 84.9 J/cm2) for 30s. During irradiations, pulpal temperature was evaluated by fast-response thermocouples, while surface temperature and heat distribution on surrounding tissues were measured by infrared thermography. It was observed a mean surface temperature increase of 293.48??30.6?? C in root dentin surface, and 15.85 ?? 39.6?? C below the irradiated area, 11.72 ?? 8.7?? C above the irradiated area, 19.77 ?? 4.9?? C at 1 cm laterally and 7.03 ?? 2.7?? C at 2 cm laterally to the irradiated area. The mean pulpal temperature augment registered was 6.5??1.4?? C. It can be concluded that Nd:YAG laser irradiation promoted surface temperature rises that suggest chemical changes on dentin; however, the temperature increases generated in the adjacent tissues (region of periodontal ligament) and in the pulp chamber may be dangerous in future clinical application considering the irradiation time of 30 s made in this study. Therefore, this laser protocol can be used as long as the irradiation time is reduced in future studies.Submitted by Pedro Silva Filho (pfsilva@ipen.br) on 2020-12-18T18:42:14Z No. of bitstreams: 1 27453.pdf: 244848 bytes, checksum: 2435de220032782799d01e0a96e96e4e (MD5)Made available in DSpace on 2020-12-18T18:42:14Z (GMT). No. of bitstreams: 1 27453.pdf: 244848 bytes, checksum: 2435de220032782799d01e0a96e96e4e (MD5)Funda????o de Amparo ?? Pesquisa do Estado de S??o Paulo (FAPESP)Coordena????o de Aperfei??oamento de Pessoal de N??vel Superior (CAPES)Conselho Nacional de Desenvolvimento Cient??fico e Tecnol??gico (CNPq)FAPESP: 17/21887-4CAPES: PROCAD 88881.068505/2014-01CNPq: INCT 465763/2014-61031-1035Sociedade Brasileira de Engenharia Biom??dicadentistrydentinneodymium lasersyttrium compoundsteethcariesTemperature generation and transmission in root dentin during Nd:YAG laser irradiation for preventive purposesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCBEBIRio de Janeiro, RJVit??ria, ES693600FORJAZ, C.R.H.ZEZELL, D.M.ANA, P.A.BRAZILIAN CONGRESS IN BIOMEDICAL ENGINEERING, 27thinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional do IPENinstname:Instituto de Pesquisas Energéticas e Nucleares (IPEN)instacron:IPEN274532020ZEZELL, D.M.20-12Proceedings693ZEZELL, D.M.:693:920:NORIGINAL27453.pdf27453.pdfapplication/pdf244848http://repositorio.ipen.br/bitstream/123456789/31681/1/27453.pdf2435de220032782799d01e0a96e96e4eMD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81748http://repositorio.ipen.br/bitstream/123456789/31681/2/license.txt8a4605be74aa9ea9d79846c1fba20a33MD52123456789/316812022-06-27 16:17:47.765oai:repositorio.ipen.br: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Repositório InstitucionalPUBhttp://repositorio.ipen.br/oai/requestbibl@ipen.bropendoar:45102022-06-27T16:17:47Repositório Institucional do IPEN - Instituto de Pesquisas Energéticas e Nucleares (IPEN)false |
dc.title.pt_BR.fl_str_mv |
Temperature generation and transmission in root dentin during Nd:YAG laser irradiation for preventive purposes |
title |
Temperature generation and transmission in root dentin during Nd:YAG laser irradiation for preventive purposes |
spellingShingle |
Temperature generation and transmission in root dentin during Nd:YAG laser irradiation for preventive purposes FORJAZ, C.R.H. dentistry dentin neodymium lasers yttrium compounds teeth caries |
title_short |
Temperature generation and transmission in root dentin during Nd:YAG laser irradiation for preventive purposes |
title_full |
Temperature generation and transmission in root dentin during Nd:YAG laser irradiation for preventive purposes |
title_fullStr |
Temperature generation and transmission in root dentin during Nd:YAG laser irradiation for preventive purposes |
title_full_unstemmed |
Temperature generation and transmission in root dentin during Nd:YAG laser irradiation for preventive purposes |
title_sort |
Temperature generation and transmission in root dentin during Nd:YAG laser irradiation for preventive purposes |
author |
FORJAZ, C.R.H. |
author_facet |
FORJAZ, C.R.H. ZEZELL, D.M. ANA, P.A. BRAZILIAN CONGRESS IN BIOMEDICAL ENGINEERING, 27th |
author_role |
author |
author2 |
ZEZELL, D.M. ANA, P.A. BRAZILIAN CONGRESS IN BIOMEDICAL ENGINEERING, 27th |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
FORJAZ, C.R.H. ZEZELL, D.M. ANA, P.A. BRAZILIAN CONGRESS IN BIOMEDICAL ENGINEERING, 27th |
dc.subject.por.fl_str_mv |
dentistry dentin neodymium lasers yttrium compounds teeth caries |
topic |
dentistry dentin neodymium lasers yttrium compounds teeth caries |
description |
High-intensity lasers are widely used in dental procedures and the heating produced on the surface is necessary to ensure protective activity against the development of caries and erosion lesions. However, caution should be exercised regarding the spread of heat to the pulp, periodontal tissue and alveolar bone, which can cause harm to these tissues. This study sought to evaluate the generation and transmission of heat in the root dentin and adjacent tissues during irradiation with Nd:YAG laser for preventive activity. For that, 15 lower incisor human teeth had an area of 9 mm2 of root dentin irradiated with Nd:YAG laser (??=1.064 ??m, 10 Hz, 60 mJ/pulse, 84.9 J/cm2) for 30s. During irradiations, pulpal temperature was evaluated by fast-response thermocouples, while surface temperature and heat distribution on surrounding tissues were measured by infrared thermography. It was observed a mean surface temperature increase of 293.48??30.6?? C in root dentin surface, and 15.85 ?? 39.6?? C below the irradiated area, 11.72 ?? 8.7?? C above the irradiated area, 19.77 ?? 4.9?? C at 1 cm laterally and 7.03 ?? 2.7?? C at 2 cm laterally to the irradiated area. The mean pulpal temperature augment registered was 6.5??1.4?? C. It can be concluded that Nd:YAG laser irradiation promoted surface temperature rises that suggest chemical changes on dentin; however, the temperature increases generated in the adjacent tissues (region of periodontal ligament) and in the pulp chamber may be dangerous in future clinical application considering the irradiation time of 30 s made in this study. Therefore, this laser protocol can be used as long as the irradiation time is reduced in future studies. |
publishDate |
2020 |
dc.date.evento.pt_BR.fl_str_mv |
October 26-30, 2020 |
dc.date.accessioned.fl_str_mv |
2020-12-18T18:42:14Z |
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2020-12-18T18:42:14Z |
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