Friction does not increase anchorage loading.
Am J Orthod Dentofacial Orthop
; 131(3): 412-4, 2007 Mar.
Article
en En
| MEDLINE
| ID: mdl-17346599
ABSTRACT
Conventional wisdom suggests that orthodontists must apply added force to overcome friction during canine retraction (sliding mechanics), the result of which can be increased anchorage loading and anchorage loss. However, for a frictional force to be exerted mesially by the archwire against a canine during retraction, the archwire must be compressed between the canine and the anchor molar, and an equal but opposite force must be applied distally against the molar by the archwire. In other words, the frictional force that reduces the force of retraction on the canine must also reduce the protraction force on the molar. Emphasis on employing reduced-friction (eg, self-ligating) brackets during sliding mechanics to prevent added posterior anchorage loading is unwarranted and based more on bracket salesmanship than on orthodontic biomechanics.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Alambres para Ortodoncia
/
Técnicas de Movimiento Dental
/
Diente Canino
/
Métodos de Anclaje en Ortodoncia
/
Diente Molar
Límite:
Humans
Idioma:
En
Revista:
Am J Orthod Dentofacial Orthop
Asunto de la revista:
ODONTOLOGIA
/
ORTODONTIA
Año:
2007
Tipo del documento:
Article
País de afiliación:
Estados Unidos