Effect of elastomeric ligatures on frictional forces between the archwire and orthodontic bracket
Braz. j. oral sci
;
12(1): 41-45, jan.-mar. 2013. ilus, tab
Artigo
em Inglês
| LILACS, BBO
| ID: lil-671931
ABSTRACT
Aim:
To evaluate the frictional force between the archwire and orthodontic bracket generated by elastomeric ligatures with polymer coating (Super slick, TP Orthodontics) and conventional ligatures (Morelli) using two types of insertion techniques.Methods:
Forty elastomeric ligatures, 20 with polymer coating and 20 conventional, were evaluated. Each type of ligature was separated into two groups (n=10), according to the insertion mode conventional or crossed (from mesial to distal region crossed in front). To analyze friction, 40 5-cm-long segments of stainless steel orthodontic archwire 0.019" x 0.025" (Morelli) and Edgewise brackets (slot 0.022" x 0.028"; Morelli) were used. Each set (bracket, wire and elastic) was submitted to frictional testing in a universal test machine (Instron 4411) at a crosshead speed of 5 mm/min. Each bracket was moved 5 mm on the wire, with maximum friction and mean friction being recorded by software. Three readouts were taken for each bracket. Data were submitted to two-way ANOVA and Tukeys test (p<0.05).Results:
It was shown that for maximum and mean friction, the polymer-coated ligature did not differ statistically from the conventional type in a dry environment condition. Ligatures placed incrossed mode promoted significantly greater friction than those placed in conventional mode, irrespective of the type of elastomeric ligature.Conclusions:
Friction depended on the insertion mode, but not on the type of elastomeric ligature.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Ortodontia
/
Fricção
/
Elastômeros
Idioma:
Inglês
Revista:
Braz. j. oral sci
Assunto da revista:
Odontologia
Ano de publicação:
2013
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
UNIAraras/BR
/
UniAraras/BR
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