Chulalongkorn University Dental Journal
Publication Date
2010-05-01
Abstract
Objective The purpose of this study was to compare the shear-peel bond strength of metal bracket to the prepared porcelain surface with two different surface preparations; silane and 1.23% acidulated phosphate fluoride (APF) gel. Materials and methods The samples were comprised of 60 porcelain disks (diameter 10 mm, thickness 4 mm). All were unglazed with green stones and then were randomly assigned into 2 groups (30 specimens each). Group 1 (control), the porcelain surface was prepared with silane. Group 2, the porcelain surface was etched with 1.23% APF gel for 10 minutes. A central incisor metal bracket was bonded to the prepared porcelain surface with light-cured adhesive resin and stored in distilled water at 37 ÌC for 24 hours. The shear-peel bond strength was measured by the Instron Universal Testing Machine with 250 Newton (N) load cell at 0.5 mm/min crosshead speed. Difference between the shear-peel bond strength of the two surface preparation procedures was analyzed with independent sample T-test at p = 0.05. Survival probability of bracket was also analyzed by Weibull analysis. Results No significant difference was found between the shear-peel bond strength of the APF gel group (9.42 ± 1.93 megapascals, MPa) and that of the silane group (9.68 ± 1.91 MPa) (p = 0.604). Conclusion The 1.23% APF gel can probably be an alternative of surface preparation when bonding metal bracket to porcelain surface after unglazing with a green stone bur.
DOI
10.58837/CHULA.CUDJ.33.2.5
First Page
109
Last Page
118
Recommended Citation
Vatarugegrid, Suchon and Viteporn, Smorntree
(2010)
"Shear-peel bond strength of metal bracket to porcelain surface treated with 1.23% acidulated phosphate fluoride gel,"
Chulalongkorn University Dental Journal: Vol. 33:
Iss.
2, Article 5.
DOI: 10.58837/CHULA.CUDJ.33.2.5
Available at:
https://digital.car.chula.ac.th/cudj/vol33/iss2/5