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| Study of Normal Reference Range of Children Upper Airway and Hyoid with No Obstructive Sleep Apnea Hypoventilation Syndrome (OSAHS) in Anyang |
| Department of Orthodontics, Anyang of Stomatology Hospital，Henan 455000, China |
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Abstract 【Objective】The establishment of normal reference range of children upper airway and hyoid with no obstructive sleep apnea hypoventilation syndrome (OSAHS) in Anyang city.【Methods】400 children with no OSAHS clinical symptoms in the orthodontic Department of the Stomatology Hospital of Anyang city from January 2012 to December 2014 were selected as the research subjects (observation group) In addition, 150 cases with normal jaws(upper and lower) both sagittal and vertical performing an average angle relationship (osseous Type I) were selected as the control group. The two groups were all shot with cephalometric roentgenogram measurement（CRM）.【Results】 The comparison between［subspinale（A） Nasal root point (N) supramental（B）angle, Angle ANB］, the protrusion and mandibular plane angle (MPSN angle) of the two groups had no significant difference (P>0.05). PNSR、PNSAd2、PNSUPW、TBTPPW and VLPW of the two groups both for male and female had no significant difference (P>0.05). The soft palate backward，SPPSPPW and UMPW of male were significantly lower than those of female (P<0.05). Hyoidsella level distance (HS) of the two groups of the male and the female showed no significant difference (P>0.05). HFH,HMP and HVIof the male were significantly higher than those of the female（P<0.05).【Conclusion】This study establishes the normal reference range of the upper airway and hyoid bone of children's early permanent dentition in Anyang city; Hyoid position in the male is lower and more forward than that in the female ; The airway clearance after airway sagittal diameter of the soft palate of the male is smaller than that of male. Sagittal dimensions of upper airway soft palate in the posterior airway space of the male are smaller than those of the female.
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Received: 08 June 2015
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2015, Vol. 32 
