Are torque values of preadjusted brackets precise?
J. appl. oral sci
;
19(4): 313-317, July-Aug. 2011. ilus, tab
Article
Dans Anglais
| LILACS
| ID: lil-599751
ABSTRACT
OBJECTIVE:
The aim of the present study was to verify the torque precision of metallic brackets with MBT prescription using the canine brackets as the representative sample of six commercial brands. MATERIAL ANDMETHODS:
Twenty maxillary and 20 mandibular canine brackets of one of the following commercial brands were selected 3M Unitek, Abzil, American Orthodontics, TP Orthodontics, Morelli and Ortho Organizers. The torque angle, established by reference points and lines, was measured by an operator using an optical microscope coupled to a computer. The values were compared to those established by the MBT prescription.RESULTS:
The results showed that for the maxillary canine brackets, only the Morelli torque (-3.33º) presented statistically significant difference from the proposed values (-7º). For the mandibular canines, American Orthodontics (-6.34º) and Ortho Organizers (-6.25º) presented statistically significant differences from the standards (-6º). Comparing the brands, Morelli presented statistically significant differences in comparison with all the other brands for maxillary canine brackets. For the mandibular canine brackets, there was no statistically significant difference between the brands.CONCLUSIONS:
There are significant variations in torque values of some of the brackets assessed, which would clinically compromise the buccolingual positioning of the tooth at the end of orthodontic treatment.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Brackets orthodontiques
/
Conception d'appareil orthodontique
/
Moment de torsion
Type d'étude:
Guide de pratique
Limites du sujet:
Humains
langue:
Anglais
Texte intégral:
J. appl. oral sci
Thème du journal:
Dentisterie
Année:
2011
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
University of São Paulo/BR
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