Imaging of Dental Hard Tissue Surfaces Prepared by an Ultrashort Pulsed Laser System (USPL).
Microsc Microanal
; 22(6): 1189-1197, 2016 12.
Article
em En
| MEDLINE
| ID: mdl-27938451
ABSTRACT
The aim of this study was to compare surface structures of laser-irradiated dental hard tissues using confocal (CFM), atomic force (AFM), and scanning electron microscopy (SEM). The general potential of the AFM in analyzing laser-irradiated surfaces was determined in this context. Specimens of human enamel and dentin were irradiated using an 8.6 W NdYVO4 laser with a pulse duration of 8 ps, λ Center=1,064 nm, and a pulse repetition rate of 500 kHz. Surface topology of irradiated areas (1 mm2) was investigated using AFM, CFM, and SEM. Surface roughness R z was measured only with the AFM and the CFM. For non-irradiated enamel and dentin surfaces, roughnesses for CFM and AFM are in the nanometer range. However, major differences in roughness were determined for laser-prepared surfaces. For enamel, R z (CFM)=2.33 µm is much higher compared with R z (AFM)=0.09 µm; in the case of dentin, R z (CFM)=5.35 µm is also much higher compared with R z (AFM)=0.093 µm. Information regarding structural properties of surfaces needs real dimensions, particularly for use in dentistry. In this respect, AFM technology provides no additional results that lead to a significant improvement.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Esmalte Dentário
/
Dentina
/
Lasers
Limite:
Humans
Idioma:
En
Revista:
Microsc Microanal
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Alemanha