Temperature generation and transmission in root dentin during Nd:YAG laser irradiation for preventive purposes
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2020
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BRAZILIAN CONGRESS IN BIOMEDICAL ENGINEERING, 27th
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 (λ=1.064 μm, 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.
Como referenciar
FORJAZ, C.R.H.; ZEZELL, D.M.; ANA, P.A. Temperature generation and transmission in root dentin during Nd:YAG laser irradiation for preventive purposes. In: BRAZILIAN CONGRESS IN BIOMEDICAL ENGINEERING, 27th, October 26-30, 2020, Vitória, ES. Proceedings... Rio de Janeiro, RJ: Sociedade Brasileira de Engenharia Biomédica, 2020. p. 1031-1035. Disponível em: http://200.136.52.105/handle/123456789/31681. Acesso em: 29 Mar 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.