Resumo
As contenções fixas em ortodontia têm demonstrado excelentes resultados para a estabilidade e durabilidade do tratamento. Apesar disso, observou-se que existem certos movimentos dentários indesejados totalmente diferentes de uma recorrência à sua posição inicial anterior ao tratamento ortodôntico. O chamado “efeito de torção” é um deles, e se caracteriza por uma inclinação em sentidos opostos dos caninos contralaterais, onde um apresenta uma inclinação para vestibular e outro para lingual ou palatino. Ocorre principalmente na mandíbula, apesar do retentor permanecer perfeitamente preso aos dentes. O objetivo desta revisão bibliográfica é avaliar os diferentes fatores relatados na literatura que podem estar relacionados ao aparecimento do “efeito turn” e quão relevantes podem ser no seu desenvolvimento. Em conclusão, é importante considerar a natureza multifatorial deste tipo de complicações, onde o tipo e a qualidade do fio utilizado para contenção, juntamente com as características periodontais do paciente, mostraram algum envolvimento na sua génese, pelo que é essencial conscientizar os pacientes sobre a importância de check-ups ortodônticos periódicos após a remoção dos aparelhos fixos para monitorar e controlar os resultados oclusais alcançados e o estado dos dispositivos de contenção instalados
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