A comparative study on cephalometric measurement at different body postures for non-snore'ers and OSAHS patients

PURPOSE:To investigate the influence on upper airway at different body postures between non-snore'ers and OSAHS patients by cephalometry. METHODS: Ten non-snore'ers and ten OSAHS patients were diagnosed by cephalometric analysis at 3 different body postures. RESULTS: Compared with non-snore'ers at the same body posture,OSAHS patients' ANB angle,the thickness of soft palate and hyoid vertical distance increased,oropharynx distance decreased; SNB angle and MP-SN angle of non-snore'ers decreased at supine and relaxing than sitting, the thickness of soft palate increased; H-C3 distance and PAS distance decreased. H-C3 distance of OSAHS patients also decreased. CONCLUSION: Non-snore'ers have a significant difference from OSAHS patients in the way of facial formation and structure relation of soft and hard issue around airway at different body postures.