[The comparative characteristics of the parameters of the temporomandibular joint and skull in children with bite anomalies].

The authors compare the mean values of 5 parameters of the temporomandibular joint and 19 skull parameters, analyzing 155 tomograms of the joint and 246 teleroentgenograms of the head of children with sagittal and vertical occlusion abnormalities during change of teeth and in permanent occlusion. This comparison has revealed a relationship between the parameters of the temporomandibular joint and the skull. The correlations were the most marked between the height of the mandibular head, height of the mandibular fossa, on the one hand, and anterosuperior and total posterior heights of the face, length of mandibular body and height of its branch, on the other hand.

[Comparative characteristics of masticatory muscle tonus in children with orthognathic and prognathic deep bites before and after orthodontic treatment].

In 99 orthognathic children 7 to 15 years and 83 age-matched children with deep prognathism the masticatory muscles stiffness was measured in a relatively resting state and maximal voluntary contraction. In children with anomalous occlusion the stiffness of relaxed muscles was increased as related to normal values, and their contractility was reduced. After the orthodontic treatment the indices of muscular tonus improved.