Abstract
In order to make a study of the surgical treatment and speech therapy of cleft palate patients, one must first of all thoroughly understand the embryological development and the synergical function of the muscles of the rhinopharynx, the soft palate, and the pharynx. Embryology Cleft palate is the consequence of an arrested development of the incisive bud and of the maxillary bud. The fusion is later than for the lip (60 days). It is always completed before the 90th day. By the 9th embryonic week, the hard palate is formed but not ossified. This ossifi— cation of the palatine apophysis comes from 6 or 7 different centers of ossification.
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