Grau de aceitação de mini-implantes por pacientes em tratamento ortodôntico: estudo preliminar

Abstract

OBJETIVOS: os mini-implantes atualmente representam um grande avanço na Ortodontia, por proporcionarem máxima ancoragem com o mínimo de cooperação dos pacientes. No entanto, ainda existem algumas dúvidas quanto ao uso destes dispositivos temporários de ancoragem no que se refere, principalmente, aos aspectos psicológicos de aceitação pelos pacientes durante o tratamento ortodôntico. METODOLOGIA: dez pacientes adultos, portadores de má oclusão de Classe I, com biprotrusão, que foram submetidos a tratamento ortodôntico com a colocação de quatro mini-implantes nos arcos dentários, entre os primeiros molares e segundos pré-molares superiores e inferiores, responderam a um questionário, com o objetivo de avaliar as condições de aceitação dos mini-implantes. RESULTADOS: as respostas indicaram que a maioria dos pacientes aceitou prontamente o procedimento, estavam satisfeitos e recomendariam para outros pacientes (90%), enquanto 50% tiveram alguma preocupação com os procedimentos cirúrgicos e os outros 50% não relataram nenhum desconforto. O tempo médio de tolerância a partir da colocação foi de 3 dias e a maioria tolerou os implantes durante todo o tratamento ortodôntico. CONCLUSÕES: pôde-se concluir que os mini-implantes foram aceitos de forma positiva pela maioria dos pacientes submetidos ao tratamento ortodôntico.

Fracture strength of orthodontic mini-implants

“…During the insertion, control features should be used such as micro-motor with controlled torque, 13 manual wrench 1 or dynanometer 27 to prevent this torque from approaching or reaching the fracture torque of mini-implants. Fracture toughness of mini-implants varies according to the manufacturer and type of mini-implant, so the operator should be aware of the characteristics of mini-implants that influence the torque values of fracture before choosing one to be used, and the maximum torque that can safely be used clinically for the insertion 18 …”

“…Mini-implants have been an effective anchorage method, 1 being very well tolerated by patients, 2 creating new possibilities for orthodontic treatment that requires minimal cooperation and maximum aesthetics results, particularly in adults 3 . Unlike osseointegrated dental implants made of commercially pure titanium, mini-implants are manufactured with the alloy Ti6Al4V (ASTM grade 5) 4 …”

“…The mini-implant installation is simple, and it can be inserted in various sites because of its reduced size, 1 , 7 , 8 including those between the roots of teeth using mono or bicortical anchor, 9 alone or connected by an interchangeable structure 10 . On the other hand, the small size of mini-implants empowers an increase of fracture during insertion, deformation or fracture during its removal 4 .…”

Dental, skeletal and soft tissue effects of the Distal Jet appliance: A prospective clinical study

“…All patients presented the germen of the maxillary third molars and the maxillary second molars erupted at the beginning of treatment. Four 11.0 to 14.7 years) obtained from the files of the same Orthodontic Department, who did not receive any orthodontic treatment. The control group was an untreated historical control group selected in order to match the experimental group, according to the inclusion criteria.…”

“…However, these devices cannot be used in all cases, for several factors as failure of the miniscrews, no patient acceptance due to surgical procedure necessary to installation, or by the presence of systemic disorder. [8][9][10][11] In these cases, the orthodontist should use intraoral distalizer with conventional anchorage.…”