[Relationships between dysgnathias, mode of formation of the sound S and abnormal deglutition].

In this study it is tried to clear how much there exist correlations between sigmatisms and abnormal deglutition of patients with dysgnathias. It was found of 535 patients of an orthodontic department that abnormal swallowing of patients with dysgnathias having a sigmatism with a probability of error of 1% appears highly significantly more often than of patients with dysgnathias without sigmatism. With nearly 50% of persons with sigmatism in the same time showing a dysgnathia may be expected an abnormal mode of deglutition. Relationship between abnormal swallowing and sigmatisms is with 76.47% especially high at "protruding of the lower jaw", followed by "open bite" with 75%, then "extendet overjet" with 47.78%, whereas at "lack of room" this relationship may be observed at 35.42% of the cases.