Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (17): 3148-3151.doi: 10.3969/j.issn.1673-8225.2011.17.026

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Changes in the localization of the maxillary sinus floor measured with Auto-CAD software

Han Rui1, 2, Mi Cong-bo1, Wang Li2, Zu Qing1   

  1. 1Department of Orthodontics, First Affiliated Hospital of Xinjiang Medical University, Urumqi  830054, Xinjiang Uygur Autonomous Region, China; 2Stomatological Hospital of Urumqi, Urumqi  830000, Xinjiang Uygur Autonomous Region, China
  • Received:2010-12-31 Revised:2011-03-30 Online:2011-04-23 Published:2011-04-23
  • Contact: Mi Cong-bo, Chief physician, Department of Orthodontics, First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China mi670105@sina.com
  • About author:Han Rui, Physician, Department of Orthodontics, First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China hanruiyezi@sina.com
  • Supported by:

    the Science and Technology Program of Urumqi Health Bureau, No. 201008*

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Abstract:

BACKGROUND: Some scholars have specifically recounted the mandible measurement methods based on panoramic radiographs. However, there are no reports regarding the localization changes of the maxillary sinus floor. 
OBJECTIVE: To investigate the changes of maxillary sinus floor localization from 300 children of 4-14 years old during the growth and development.
METHODS: The materials for this investigation comprised panoramic radiographs of 300 children (150 girls and 150 boys) whose ages ranged from 4 to 14 years. The materials were divided into five groups according to Hellman’s dental developmental stages. Auto-CAD (CAD-computer Aided Design) software was used to analyze the panoramic radiographs. The tracing of each radiograph was digitized by translating the reference points onto an X-Y coordinate system. The straight line that passes point O (the point that nasal septum intersects with hard palate) and point PA (the point that medial wall of maxillary sinus intersects with hard palate) was designated as the X axis. The straight linevertical to the X axis and passing through point O at a rightangle was designated as the Y axis. The X and Y coordinate values of reference point were calculated. And then O point was (0, 0), the maxillary sinus floor localization (S) was (SX, SY).
RESULTS AND CONCLUSION: There were no significant differences between males and females from group 1 to group 5 in (SX, SY) (P > 0.05). The differences between group 1 and other groups were significant in SX (P < 0.01), But 2, 3, 5 groups had no significant differences, there were significant differences between group 4 and group 5 (P < 0.01). There were significant differences in SY among 2, 3, 4, 5 groups (P < 0.01), but group 1 and group 2 had no significant differences (P > 0.05). The position of maxillary sinus floor grew downward and outward with age.

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