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Brazilian Journal of Oral Sciences
Piracicaba Dental School - UNICAMP
EISSN: 1677-3225
Vol. 10, No. 3, 2011, pp. 180-183
Bioline Code: os11036
Full paper language: English
Document type: Research Article
Document available free of charge

Brazilian Journal of Oral Sciences, Vol. 10, No. 3, 2011, pp. 180-183

 en Fracture strength of ceramic brackets submitted to archwire torsional strain
Manhães, Fernando Rayes; Divino, Rosilene; Lucato, Adriana Simone; Vedovello, Sílvia Amélia Scudeler; Correa, Cristian & Valdrigh, Heloísa Cristina

Abstract

Aim: To evaluate the fracture strength of ceramic brackets submitted to archwire torsional strain.
Methods: Different types of maxillary central incisor ceramic brackets from four different commercial brands, Roth prescription (0.022" x 0.028"), were evaluated, namely: Mystique (GAC), InVu (TP Orthodontics), Clarity (3M Unitek) and Luxi II (RMO Ortohodontics). To evaluate the fracture strength, 0.019"x 0.025" stainless steel orthodontic wires were inserted into the bracket channels and submitted to torsion until they fractured.
Results: The InVu brackets showed a significantly higher fracture strength than the other brackets (p<0.05), which did not differ significantly among them (p<0.05).
Conclusions: Among the brackets tested, the traditional ceramic bracket InVu showed the highest fracture strength, while the Luxi II bracket, obtained the lowest value.

Keywords
braces, ceramics, orthodontics, biomechanics

 
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