Ten cases of obstructive sleep apnea syndrome (OSAS) seen from Aprl in 1985 to June in 1988 were studied in terms of clinical features and results of various treatments.
The causes of OSAS were as follows: obesity in 9 cases, anterioinferior advancement of the hyoid bone in which cephalometry showed as much as 30°more than enlargement in angulation between the mandibule and the hyoid bone in 5 cases, and tonsil hypertrophy in 5 cases.
Treatment for OSAS was done respectively to remove the causes.As a result, uvulopalatopharyngoplasty (UPPP) was used in 6 patients, although 3 of them turned out to be unsuccessful.
It was thought that tongue advancement may be responsible for failure in UPPP and that cephalography was useful in diagnosis of narrowing at the hypopharynx area.
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