Revista de Odontologia da UNESP
Revista de Odontologia da UNESP
Original Article

Hyoid bone's cephalometric positional study in normal occlusion and in malocclusion patients

Estudo cefalométrico da posição do osso hióide em pacientes com oclusão normal e portadores de maloclusão

Galvão, C.A.A.N.

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The hyoid bone plays an importam role in the physiology of the tongue, whose deviations may cause sevete malocclusions. This study tries to show, by cephalometric roentgenograms, the position of this bone in connection with some skull structures in those patients with a normal occlusion and in those who present malocclusian problems. The patients were divided into groups from which 35 of them, young adult patients, were positioned in the control group because of their normal occlusion, and the others, 55 patients in the skeletal growth process were divided into three groups according to the respective malocclusion ofeach alie, following Angle's classification. It was verified that the biggest linear measurements were those from young adults considered to be normal occlusion patients and the biggest angular ones were observed in the Class II malocclusion patients. The measurements related to the bony pharynx presented a relative stability in the position of this strueture.


Hyoid bone, cephalometries, malocclusion


O osso hióide desempenha um papel importante na fisiologia da língua, cujos desvios podem ocasionar severas maloclusões. Este trabalho procura mostrar, através de radiografias cefalométricas, a posição deste osso em relação a algumas estruturas do crânio. Foram estudados, por intermédio de cefalogramas laterais, 90 pacientes, sendo 35 adultos jovens com oclusão normal e 55 pacientes em fase de crescimento portadores de maloclusões. Destes, 21 eram portadores de Classe I, 20 portadores de Classe II, divisão 1 e 14 portadores de Classe III. Verificou-se que, de modo geral, as maiores medidas lineares foram obtidas nos pacientes com oclusão normal e as medidas angulares, com uma única exceção, foram observadas nos pacientes com maloclusão de Classe II. O faringe ósseo mostrou possuir certa estabilidade na sua posição.


Osso hióide, cefalometria, maloclusão


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