Publication: Systematized bracket-enamel adhesion test
Accepted Date
2013-11-07
Issued Date
2014-05
Resource Type
Language
eng
ISSN
0125-5614 (printed)
Rights
Mahidol University
Rights Holder(s)
Faculty of Dentistry Mahidol University
Bibliographic Citation
Chaiprasongsook A, Tuangsettawut P, Pittayachawan P, Manopatanakul S. Systematized bracket-enamel adhesion test. M Dent J. 2014; 34(2): 114-21.
Suggested Citation
Amonrat Chaiprasongsook, Penpimol Tuangsettawut, Piyapanna Pittayachawan, ปิยพรรณา พิทยชวาล, Somchai Manopatanakul, สมชัย มโนพัฒนกุล Systematized bracket-enamel adhesion test. Chaiprasongsook A, Tuangsettawut P, Pittayachawan P, Manopatanakul S. Systematized bracket-enamel adhesion test. M Dent J. 2014; 34(2): 114-21.. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/1130
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Title
Systematized bracket-enamel adhesion test
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Abstract
Objective: Bracket-enamel adhesion studies should address the most
important issues – systematic tests and comparable results. Therefore, the
purpose of this study is to standardize the bracket-enamel adhesion test by
controlling all variables systematically.
Materials and methods: Fifty-six human enamel-bracket adhesions were
tested by controlling significant factors including enamel surface, adhesive
paste and bracket. The thermocycling was completed (15 sec, 2000 cycles, 5
and 55 degree Celsius). The shear test was exerted by Instron Universal
machine (Model 5566, Instron Corp., UK). Moreover, the failure site
characteristics were evaluated. The results were analysed using Weibull
analysis.
Results: The mean debonding stress and Weibull modulus were 9.47 MPa
(S.D.=1.41) and 7.58, respectively. This result was compared to relevant study
using t-test. The result suggested that bonds of bracket to human enamel
were significantly lower than bond to bovine enamel (P<0.01) despite the
similar research methodology. Additionally, the failure sites were analysed
using Adhesive Remnant Index (ARI). Most brackets of this study showed the
ARI of three.
Conclusions: To summarize, the mean stress to break the bond was 9.47 MPa
(S.D.=1.41). It could also be concluded that meaningful comparison should
arise from systematic studies. However, among the similar research studies,
the debonding stress of bracket to bovine enamel was higher than human
premolar enamel.