FT-IR spectroscopy assessment of aesthetic dental materials irradiated with low-dose therapeutic ionizing radiation


Autoria(s): CRUZ, A. D.; ALMEIDA, S. M.; RASTELLI, A. N. S.; BAGNATO, Vanderlei Salvador; BYSCOLO, F. N.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

20/10/2012

20/10/2012

2009

Resumo

The aim of the present study was to evaluate the effects of low-dose therapeutic ionizing radiation on different aesthetic dental materials. Forty five specimens (n = 45) of three different aesthetic restorative materials were prepared and randomly divided into five groups: G1 (control group); G2, G3, G4, G5 experimental groups irradiated respectively with 0.25, 0.50, 0.75, and 1.00 Gy of gamma radiation by the (60)Co teletherapy machine. Chemical analyses were performed using a FT-IR Nicolet 520 spectrophotometer with reflectance diffuse technique. Even a minimal exposition at ionizing radiation in therapeutic doses can provide chemical changes on light-cured composite resins. The three studied restorative materials showed changes after exposure at gamma radiation, however the increase of the radiation dose did not contribute to an increase in this effect.

FUNCAMP

Fundação de Desenvolvimento da Unicamp (Funcamp)

Identificador

LASER PHYSICS, v.19, n.3, p.461-467, 2009

1054-660X

http://producao.usp.br/handle/BDPI/29725

10.1134/S1054660X09030189

http://dx.doi.org/10.1134/S1054660X09030189

Idioma(s)

eng

Publicador

MAIK NAUKA/INTERPERIODICA/SPRINGER

Relação

Laser Physics

Direitos

restrictedAccess

Copyright MAIK NAUKA/INTERPERIODICA/SPRINGER

Palavras-Chave #NONIRRADIATED HUMAN DENTIN #ER-YAG LASERS #BOND STRENGTH #RESTORATIVE MATERIALS #CONVERSION ANALYSIS #GAMMA-RADIATION #RESINS #ENAMEL #COMPOSITES #CO2 #Optics #Physics, Applied
Tipo

article

original article

publishedVersion