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      Orthodontic traction of impacted canines: Concepts and clinical application

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          ABSTRACT

          Orthodontic traction of impacted canines stands as a major challenge for Orthodontics. It is a relatively frequent clinical complaint which management, more often than not, requires a multidisciplinary approach. Surgical exposure of the impacted canine, and the complex orthodontic mechanics applied to align the tooth back into the arch, may frequently lead to complications involving supporting tissues, not to mention the long treatment time and high costs imposed to patients. In face of that, it is worth highlighting the relevance of early diagnosis as to intervene efficiently and as soon as possible. This paper presents a review of the main concepts involving prevalence, etiology and classification of impacted canines, and describes the different clinical management options that would help solve the problem. It illustrates the topic by presenting a treatment delivered to a 13 year 7 months old male patient, suffering from a Class II, division 2, left subdivision, malocclusion, associated to a deep bite and a prolonged retention of a primary upper canine caused by the impaction of the permanent tooth. Corrective orthodontic therapy was associated to a rapid maxillary expansion and to the use of a high pull headgear. Impacted canine was submitted to orthodontic traction and correctly positioned back into the arch. This approach proved to be efficient in meeting both functional and aesthetic goals.

          RESUMO

          O tracionamento de caninos impactados representa um dos grandes desafios da Ortodontia. Trata-se de um problema clínico relativamente frequente, cujo tratamento muitas vezes requer uma abordagem multidisciplinar. A exposição cirúrgica do canino impactado e a complexa mecânica ortodôntica aplicada para alinhar o dente na respectiva arcada podem, com frequência, levar a complicações nos tecidos de suporte, sem mencionar o longo tempo de tratamento e os custos elevados para o paciente. Por isso, vale a pena ressaltar a importância dos diagnósticos precoces, para que a interceptação do problema seja feita o mais cedo possível e de maneira eficaz. O presente trabalho apresenta uma revisão dos principais conceitos envolvendo a prevalência, etiologia e classificação dos caninos impactados, e descreve os vários tipos de abordagem clínica para a resolução do problema. Ao final, ilustra o tema com a apresentação de um tratamento realizado em um paciente de 13 anos e 7 meses de idade, portador de má oclusão de Classe II, divisão 2, subdivisão esquerda, associado a mordida profunda, que apresentava retenção prolongada de um canino superior decíduo, devido à impacção de seu sucessor permanente. O tratamento ortodôntico corretivo foi associado à expansão rápida de maxila e ao uso de aparelho extrabucal de tração cervical. O canino impactado foi tracionado ortodonticamente e posicionado corretamente na arcada. Essa abordagem foi eficiente para atingir as metas funcionais e estéticas propostas.

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          Most cited references30

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          Palatal expansion: just the beginning of dentofacial orthopedics.

          A J Haas (1970)
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            Impacted maxillary canines: a review.

            An overview of the incidence and sequelae, as well as the surgical, periodontal, and orthodontic considerations in the management, of impacted canines is presented. The clinician needs to be familiar with the differences in the surgical management of the labially and palatally impacted canines, the best method of attachment to the canine for orthodontic force application, the advantages of one-arch versus two-arch treatment, and the implications of canine extraction. The various factors that influence all these decisions are discussed.
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              The palatally displaced canine as a dental anomaly of genetic origin.

              Palatal displacement of the maxillary canine tooth is a positional variation thought generally to develop as a result of local factors, such as retained deciduous canines, anomalous permanent lateral incisors, or dental crowding. This article contributes biologic evidence pointing to genetic factors as the primary origin of most palatal displacements and subsequent impactions of maxillary canine teeth. Data gathered from multiple sources are integrated to support a genetic etiology for the palatally displaced canine (PDC) on the basis of five evidential categories: 1. Occurrence of other dental anomalies concomitant with PDC; 2. Bilateral occurrence of PDC; 3. Sex differences in PDC occurrence; 4. Familial occurrence of PDC; 5. Population differences in PDC occurrence. From analysis of available evidence, the PDC positional anomaly appears to be a product of polygenic, multifactorial inheritance.
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                Author and article information

                Journal
                Dental Press J Orthod
                Dental Press J Orthod
                dpjo
                Dental Press Journal of Orthodontics
                Dental Press International
                2176-9451
                2177-6709
                Jan-Feb 2019
                Jan-Feb 2019
                : 24
                : 1
                : 74-87
                Affiliations
                [1 ]Private practice (Brasília/DF, Brazil).
                Author notes
                [Contact address: ] Ricardo Machado Cruz E-mail: ricardomcruz@ 123456uol.com.br

                Conception or design of the study, data acquisition, analysis or interpretation, writing the article, critical revision of the article, final approval of the article, obtained funding and overall responsibility: RMC.

                Author information
                http://orcid.org/0000-0002-9425-3628
                Article
                10.1590/2177-6709.24.1.074-087.bbo
                6434671
                30916252
                42f3854e-133a-413a-8cb6-fc4b0949fa34
                © 2019 Dental Press Journal of Orthodontics

                This is an open-access article distributed under the terms of the Creative Commons Attribution License

                History
                : 08 December 2018
                : 04 January 2019
                Page count
                Figures: 9, Tables: 2, Equations: 0, References: 29, Pages: 14
                Categories
                BBO’s Selected Article

                angle class ii,deep bite,canine traction,impacted canines,corrective orthodontics

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