PMID: 8595828Sep 1, 1995Paper

Probability of failure of orthodontic brackets bonded with different cementing agents

Dental Materials : Official Publication of the Academy of Dental Materials
C A MitchellJ M Walker

Abstract

The aim of this study was to compare the maximum loads at failure and the probability of failure of three glass ionomer cements and a composite cement bonding orthodontic brackets to human premolar teeth. The cements studied included a conventional glass ionomer cement, two resin-modified glass ionomer cements and a composite cement. The roots of 200 human premolar teeth were embedded in acrylic resin and the buccal enamel surface of the crown prepared as required. Each cement used to bond the bracket to the enamel was weighted, and light-cured where required. The specimens were stored for 10 min or 24 h at 37 degrees C and 100% humidity. A tensile shear force was applied via a wire loop placed under the wings of the bracket. The maximum load at failure was noted and subjected to Weibull analysis to compare probabilities of survival for each cement. The data obtained was also analyzed using a Kruskal-Wallis test followed by comparison of the groups using Mann-Whitney tests. Comparison of the loads at failure revealed that the composite cement was significantly stronger than the glass ionomer cements at 10 min and 24 h (p<0.05). Weibull analysis of the results gave values for the Weibull moduli and probabilities of survival for ...Continue Reading

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Citations

Aug 10, 2010·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·Yasser Lotfy Abdelnaby, Essam El Saeid Al-Wakeel
Oct 19, 2006·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·Akira YamamotoMasashi Miyazaki
Mar 1, 1996·Dental Materials : Official Publication of the Academy of Dental Materials·E J SwiftS C Bayne
Feb 15, 2000·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·S E BisharaJ R Jakobsen
Apr 27, 2017·Dental press journal of orthodontics·Shaza M HammadShafik M Fawakerji
Nov 5, 1999·Journal of Orofacial Orthopedics = Fortschritte Der Kieferorthopädie : Organ/official Journal Deutsche Gesellschaft Für Kieferorthopädie·E CzochrowskaB Ogaard

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