FTIR and SEM analysis of CO2 laser irradiated human enamel
| Autor: | Cíntia Guimarães de Almeida, Alessandra Marques Corrêa-Afonso, Maria Cristina Borsatto, Silmara Aparecida Milori Corona, Luciano Bachmann |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Materials science
Time Factors medicine.medical_treatment Chemical structure Analytical chemistry Carbonates Radiation Dosage Phosphates chemistry.chemical_compound stomatognathic system Body Water Spectroscopy Fourier Transform Infrared medicine Humans Irradiation Fourier transform infrared spectroscopy Dental Enamel General Dentistry Carbon dioxide laser Tooth Crown Co2 laser Enamel paint Dentistry(all) ESPECTROMETRIA Sem analysis Cell Biology General Medicine stomatognathic diseases Otorhinolaryngology chemistry Enamel visual_art SEM visual_art.visual_art_medium Lasers Gas Microscopy Electron Scanning Carbonate Molar Third |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 1879-1506 |
| Popis: | ObjectivesConsidering the enamel chemical structure, especially carbonate band, which has a major role in the caries prevention, the objective of the present study was to assess the chemical alterations on the enamel irradiated with CO2 laser by means of FTIR spectroscopy and SEM analysis.DesignThe enamel surfaces were analysed on a spectrometer for acquisition of the absorption spectrum relative to the chemical composition of the control sample. The irradiation was conducted with a 10.6-μm CO2 laser (0.55W, 660W/cm2). The carbonate absorption band at 1600–1291cm−1 as well as the water absorption band at 3793–2652cm−1 was measured in each sample after the irradiation. The water band was measured again 24-h after the irradiation. The band area of each chemical compound was delimited, the background was subtracted, and the area under each band was integrated. Each area was normalized by the phosphate band (1190–702cm−1).ResultsThere was a statistically significant decrease (p |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect