Dental Journal (Majalah Kedokteran Gigi)
ISSN 1978-3728
Vol. 35 / No. 4 / Published : 2002-10
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Original Article :
The effect of etching time hydrofluoric acid on porcelain surface to shear bond strength metal orthodontic brackets
Author :
Abstract :
The Purpose of this study was to determine the influence etching time on porcelain surface to the shear bond strength of metal orthodontic brackets by using hydrofluoric acid and silane. Fifty feldsparthic porcelain tablets were divided in to five equally size groups to asses the effect hydrofluoric acid etching time and silane. Group (1) without hydrofluoric acid etching and silane, (2) only prime silane, (3) 15 second etching hydrofluoric acid with silane, (4) 30 second etching hydrofluoric acid with silane and (5) 60 second etching hydrofluoric acid with silane. And Brackfix NT composite used to bond the metal brackets. Shear bond strength was used to debond the metal brackets with autograph-Shimadzu with crosshead speed of 5 mm/minute. After measuring the pattern of S =F/a (KgF/mm2) was applied and then it was conversed to unit of megapascal (Mpa). The result show that hydrofluoric acid solution was able to provide enough retention to increase bond strength which can be further improved by chemical bonding with a silane primer agent on porcelain surface (p < 0,05). Therefore bonding to porcelain is clinically possible and is an acceptable procedure in orthodontics treatment.
Keyword :
porcelain, hydrofluoric acid, silane, shear bond strength
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References :
Archive Article
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 Volume : 35 / No. : 4 / Pub. : 2002-12 |
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