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Doctoral Thesis
DOI
10.11606/T.23.2006.tde-28082006-181644
Document
Author
Full name
Augusto Ricardo Andrighetto
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2006
Supervisor
Committee
Fantini, Solange Mongelli de (President)
Freitas, Claudio Froes de
Janson, Guilherme dos Reis Pereira
Paiva, João Batista de
Ursi, Weber Jose da Silva
Title in Portuguese
"Efeitos da desprogramação neuromuscular da mandíbula, segundo a filosofia de Roth, sobre as posições da cabeça e da coluna cervical, em indivíduos assintomáticos com maloclusão de classe I"
Keywords in Portuguese
desprogramação neuromuscular
Posição natural da cabeça
Abstract in Portuguese
O propósito do presente estudo foi determinar, radiograficamente, os efeitos da desprogramação neuromuscular, por meio do uso da placa miorrelaxante superior, na posição craniocervical. A desprogramação neuromuscular foi feita objetivando-se realizar o diagnóstico ortodôntico com a mandíbula em relação cêntrica (RC), de acordo com filosofia de Roth (1981). Foram avaliados 39 indivíduos assintomáticos, com maloclusões Classe I de Angle, separados em dois grupos, o controle, contendo 15 indivíduos, com média de idade de 26 anos, não submetidos a qualquer forma de tratamento, e o tratado, contendo 24 indivíduos, com média de idade de 23 anos e 10 meses, submetidos à desprogramação neuromuscular. De cada paciente, foram obtidas duas telerradiografias em norma lateral, na posição natural da cabeça (PNC). No grupo controle, o intervalo médio entre ambas foi 6 meses e 17 dias. No grupo tratado, a primeira telerradiografia foi realizada previamente, e a segunda, após a desprogramação neuromuscular. O tempo médio de uso da placa miorrelaxante foi de 6 meses e 7 dias. A análise cefalométrica craniocervical foi realizada avaliando-se as angulações craniovertical (SN/VER), craniocervical (OPT/SN e CVT/SN), cervicohorizontal (OPT/HOR e CVT/HOR) e o ângulo da curvatura cervical (OPT/CVT). Concluíu-se que houve extensão significativa da cabeça, tanto em relação à linha vertical verdadeira, demonstrada pelo aumento do ângulo SN/VER, quanto à coluna cervical, demonstrada pelo aumento do ângulo CVT/SN. A coluna cervical apresentou alteração significativa em sua inclinação, em relação à linha horizontal verdadeira, demonstrado pelo aumento do ângulo CVT/HOR. Não houve alteração significativa da curvatura cervical. Foram, ainda, observadas correlações significativas entre as alterações das variáveis SN/VER e OPT/HOR, SN/VER e CVT/HOR, SN/VER e CVT/SN, OPT/CVT e OPT/HOR, OPT/CVT e OPT/SN, OPT/HOR e CVT/HOR, OPT/HOR e OPT/SN, assim como OPT/SN e CVT/SN.
Title in English
The effect of mandibular neuromuscular deprogramming, according to Roth’s philosophy, on the positions of the head and the cervical column, in asymptomatic subjetcs with Class I malocclusion
Keywords in English
Natural head position
neuromuscular deprogramming
Abstract in English
The purpose of this study was to determine, radiographically, the effect of neuromuscular deprogramming, through the use of an upper occlusal splint, on the craniocervical position. Neuromuscular deprogramming was performed in order to carry out orthodontic diagnosis with the mandible in centric relation (CR), according to Roth’s philosophy. Thirthy nine asymptomatic individuals, presenting Angle's Class I malocclusion, were evaluated. The sample was allocated into two groups, the control or untreated group (n=15), with mean age of 26 years, that was followed about 6 months and 17 days, and the treated group (n=24), with mean age of 23 years and 10 months. Two lateral radiographs in natural head position (NHP) were taken from each subject, one before and the other one after neuromuscular deprogramming. The average usage period of the occlusal splint was 6 months and 7 days. Craniocervical cephalometric analysis was carried out by evaluating the craniovertical (SN/VER), craniocervical (OPT/SN and CVT/SN), and cervicohorizontal (OPT/HOR and CVT/HOR) angles, as well as the angle of the cervical curve (OPT/CVT). No significant changes were seen in the control group. It was concluded that there was a significant extension of the head, both in relation to the true vertical line, as demonstrated by the increase of the SN/VER angle, and to the cervical column, as demonstrated by the increase of the CVT/SN angle. Likewise, the cervical column showed significant backward inclination in relation to the true horizontal line, as demonstrated by increase of the CVT/HOR angle. No significant alteration of the cervical curve was observed. In addition, significant correlation coefficients were observed between the differences of the pre- and post-deprogramming values of the measurements the measurements SN/VER and OPT/HOR, SN/VER and CVT/HOR, SN/VER and CVT/SN, OPT/CVT and OPT/HOR, OPT/CVT and OPT/SN, OPT/HOR and CVT/HOR, OPT/HOR and OPT/SN, and OPT/SN and CVT/SN.
 
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Publishing Date
2006-09-26
 
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