Bonding brackets to porcelain: in vitro study
Braz. dent. j
; 13(3): 191-196, 2002. ilus, tab
Article
em En
| LILACS, BBO
| ID: lil-338542
Biblioteca responsável:
BR501.1
RESUMO
The aim of this research was to verify, in vitro, the effect of various porcelain surface treatments on the shear strength of orthodontic brackets bonded to porcelain and the mode of fracture after debonding. Eighty-eight samples of metallic supported feldspathic porcelain were randomly divided into four groups according to their surface preparation as follows the porcelain was maintained intact (GI), roughened with a diamond bur (GII), etched with 10 percent hydrofluoric acid (GIII), or sandblasted with aluminum oxide (GIV). The specimens were treated with silane (Scothprime) and brackets were bonded with Concise. Each sample was subjected to a shear load at a crosshead speed of 1 mm/min and a recording was made at the point of failure. Bond strengths, adequate to withstand the application of orthodontic forces, were achieved in all groups. The Kruskal-Wallis statistical test showed no significant differences in bond strength between the groups (p>0.05). However, many more porcelain fractures occurred on deglazed porcelain. This study indicates that with the appropriate material selection, the silane/composite procedure alone may be adequate for bonding
Texto completo:
1
Índice:
LILACS
Assunto principal:
Técnicas In Vitro
/
Colagem Dentária
/
Braquetes Ortodônticos
/
Porcelana Dentária
Idioma:
En
Revista:
Braz. dent. j
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2002
Tipo de documento:
Article