Análise funcional da oclusão na dentadura decídua: avaliação dos movimentos mandibulares

Abstract

Analisou-se funcionalmente a oclusão decídua de 20crianças leucodermas de 3,5 a 5,5anos de idade, determinando-se a capacidade de abertura bucal máxima e a extensão dos movimentos de lateralidade e protrusão em relação a sexo, tipos de arco e de registros dos movimentos, utilizando-se régua milimetrada, traçado do arco gótico e microscópio comparador. Concluiu-se que a média da capacidade de abertura máxima foi de 45,72mm, sem diferença estatística entre as variáveis. As médias da capacidade de protrusão máxima foram de 8,34mm, com régua milimetrada, e de 7,25mm no arco gótico, com diferença estatisticamente significante em nível de 5% entre os dois tipos de avaliação e na interação dos fatores avaliação/tipo de arco e avaliação/sexo. As médias do movimento de lateralidade máxima com régua milimetrada foram de 8,11mm para o lado direito e 8,15mm para o lado esquerdo e, pelo arco gótico, de 7,96mm para o lado direito e 7,79mm para o lado esquerdo, com diferença estatisticamente significante em nível de 5% para o fator tipo de arco. Portanto, os determinantes funcionais da oclusão na fase da dentadura decídua podem ser estabelecidos, servindo de embasamento para a manutenção, a interceptação e a recuperação morfológica e funcional do sistema estomatognático da criança quando este apresentar-se alterado, assegurando o seu desenvolvimento adequado e o da oclusão permanente

Measurement and Evaluation of the Normal Range of Maximal Mouth Opening and Its Correlation with Age, Body Height, Weight, and Gender in the Young Indian Population

“…The results of the present study revealed that MMO in Indian children was 41.61, 44.9, and 46.81 mm for boys and 40.09, 44.22, and 46.2 mm for girls at ages of 3, 4, and 5 years respectively. Our results are in agreement with the findings reported by Sheppard and Sheppard, 4 Bernal and Tsamtsouris, 7 and Gaviao et al 8 with MMO of 42.4, 42 ± 4.6, and 45.72 mm respectively, in primary dentition. Similarly, Rothenberg 9 recorded a mean of 40.47 mm for children aged 4 to 6, and Alamoudi et al 10 found MMO of 41.2 ± 5.6 mm for children aged 3 to 7 years, measurements which are closest to this study at age of 3 years.…”

“…Abou-Atme et al 22 Few studies reported gender difference in MMO in children. 7,8 In the present study, statistically significant difference was not observed between boys and girls at various age groups. However, MMO was found to be significantly different when compared between contrast age groups.…”

“…The MMO has been reported either as the interincisal distance 1,5,6 or as the interincisal distance plus the overbite. 8 Mezitis et al 15 pointed out that the functional opening of the mouth is more important, because this is the value that actually affects chewing and dental treatment. Therefore, the interincisal distance was used as a measurement of MMO in the present study.…”

Mandibular movements in children with and without signs and symptoms of temporomandibular disorders

“…Considering the maximum mouth opening in the primary dentition, Bernal, Tsamtsouris 4 (1986) verified a mean value of 42±4.6mm, and Gavião, et al 12 (1997) 45.72mm. The findings of this study (Table 1) were smaller than the above mentioned outcomes and could be attributed to the differences in the methodology and dentition status 4,9 , as well as in the definition of the diagnostic criteria 2 .…”

Measurement System of the Temporomandibulares Joint

“…As regards the evaluation of the movement protrusion [9] found val-or maximum protrusive on average from 9 to 10 mm, [10] found higher values (10.7 mm) in children from 10 to 16 years old. Determining the maximum length of the protrusive movement in adults [11] found a value of 9.0 mm, considering the methodology with a millimeter ruler.…”