Objective: To explore the incidence of dental caries in the children with obstructive sleep apnea hypopnea syndrome( OSAHS) and the changes of serum orexin-A in the different degrees OSAHS children. Methods: A total of 167 children with OSAHS diagnosed by the polysomnography( PSG) were selected as the research group. Another 90 healthy children were as the normal control group. Both of the two groups were examined by dentist,and the incidence of dental caries of the two groups was compared. According to the...