Calcium analysis of gamma sterilized human dentin submmited to Er,Cr:YSGG laser irradiation
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2019
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Photobiomodulation, Photomedicine, and Laser Surgery
Resumo
Studies report that gamma radiation changes the oral cavity of patients
submitted to radiotherapy. These changes include xerostomia,
resulting in an unsaturation of calciumand phosphate in the oral cavity.
However, human enamel samples isolated from the altered oral environmentwhen
irradiatedwithgamma radiation at doses of up to 25kGy
(much higher than radiotherapy doses) were shown to have undergone
no changes in molecular hardness or micro surface. After approval of
the Research Ethics Committee, 20 human dentin samples were
evaluated before and after irradiation, split randomly into control group
(n = 10) and irradiated group (n = 10) treated with 25.0 kGy at the Co60
multipurpose irradiator and irradiated with Er,Cr:YSGG laser in the
parameters: 8.5 J/cm2 in the Fourier Transform Infrared Spectroscopy
(FTIR), % surface Microhardness loss and Scanning Electron Microscopy
(SEM). At the end, acidic biopsies were performed to quantify
the concentration of calcium present in the samples. In the results of
FTIR analysis differences were found only in the bands of organic
content and in the inorganic content, difference were not found between
before and after irradiations. The EDS and % Surface Microhardness
loss analysis corroborates these findings, as well as no
significant loss of the Calcium content before and after their radiation
with Co60 at 25 kGy and with the Er,Cr:YSGG laser. These findings
lead us to a new hypothesis of behavior of the hydroxyapatite crystal
submitted to the gamma irradiation.
Como referenciar
KUCHAR, NIELSEN G.; ZAMATARO, CLAUDIA B.; RABELO, THAIS; JUVINO, AMANDA; ZANINI, NATHALIA; CASTRO, PEDRO; ZEZELL, DENISE M. Calcium analysis of gamma sterilized human dentin submmited to Er,Cr:YSGG laser irradiation. Photobiomodulation, Photomedicine, and Laser Surgery, v. 37, n. 10, p. A18-A19, 2019. DOI: 10.1089/photob.2019.29013.abstracts. Disponível em: http://repositorio.ipen.br/handle/123456789/32222. Acesso em: 28 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.