Frankel appliance therapy and the temporomandibular disc: A prospective magnetic resonance imaging study

Frankel appliance therapy and the temporomandibular disc: A prospective magnetic resonance imaging study

Autor Franco, A. A. Google Scholar
Yamashita, H. K. Google Scholar
Lederman, H. M. Google Scholar
Cevidanes, LHS Google Scholar
Proffit, W. R. Google Scholar
Vigorito, J. W. Google Scholar
Instituição Univ N Carolina
Universidade Federal de São Paulo (UNIFESP)
Universidade de São Paulo (USP)
Resumo This prospective clinical study assessed the effect of the Frankel Functional Regulator-II (FR-II) treatment on the position and shape of the articular disc of the temporomandibular joint. the sample included magnetic resonance images of 112 temporomandibular joints taken initially (T1) and after 18 +/- 1 months (T2). the subjects were 56 white Brazilian children who were beginning their pubertal growth spurt. They had Class 11 Division 1 malocclusions and were selected from 800 children in neighborhood schools. They were randomly dichotomized into either the treated group (treated with the FR-II for 18 months) or the control group (not treated during the observation period). Our findings showed a low prevalence (3.57%) of disc displacement in the 112 temporomanclibular joints. Mandibular propulsion with the FR-II had no unfavorable effect on the temporomandibular joints of the treated group; 100% of the patients kept an upper and interposed disc position (closed and open mouth, respectively) at T1 and T2. the control group had 7.1% partial anterior media[ disc displacement, both at T1 and T2. Regarding disc morphology, the control group showed biconcave-shaped discs in 82.1% of the joints, statistically similar to the treated group (89.3%) at the beginning of the observation period. At T2, the articular disc morphology of the control group was unchanged, but that of the treated group was significantly more normal (P = .016), progressing from nonbiconcave at T1 (10.7%) to biconcave at T2 (100%). Our results showed that disc displacement is not a complication of functional appliance therapy; in fact, such treatment might help some children with incipient temporomandibular disorders.
Idioma Inglês
Data de publicação 2002-05-01
Publicado em American Journal of Orthodontics and Dentofacial Orthopedics. St Louis: Mosby, Inc, v. 121, n. 5, p. 447-457, 2002.
ISSN 0889-5406 (Sherpa/Romeo, fator de impacto)
Publicador Mosby, Inc
Extensão 447-457
Fonte http://dx.doi.org/10.1067/mod.2002.122241
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:000176194500005
Endereço permanente http://repositorio.unifesp.br/handle/11600/26861

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