Chinese Journal of Tissue Engineering Research ›› 2016, Vol. 20 ›› Issue (2): 202-207.doi: 10.3969/j.issn.2095-4344.2016.02.009

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Localizing the anterior wall of the maxillary sinus and maxillary tuberosity using Auto-CAD software

Han Rui1, Ma Lei1, Mi Cong-bo2, Wang Li3, Wang Yong-liang1, Zhang Qian1   

  1. 1Department of Stomatology, Huangdao Branch, Affiliated Hospital of Qingdao University, Qiangdao 266555, Shandong Province, China; 2Department of Orthodontics, First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China; 3Stomatological Hospital of Urumqi, Urumqi 830002, Xinjiang Uygur Autonomous Region, China
  • Received:2015-10-23 Online:2016-01-08 Published:2016-01-08
  • Contact: Ma Lei, M.D., Associate chief physician, Department of Stomatology, Huangdao Branch, Affiliated Hospital of Qingdao University, Qiangdao 266555, Shandong Province, China Corresponding author: Mi Cong-bo, Master, Chief physician, Department of Orthodontics, First Affiliated Hospital of Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China
  • About author:Han Rui, Master, Attending physician, Department of Stomatology, Huangdao Branch, Affiliated Hospital of Qingdao University, Qiangdao 266555, Shandong Province, China
  • Supported by:

    the Scientific Plan of Urumqi Health Department, No. 201008

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Abstract:

BACKGROUND: To make a better preparation for orthodontic tooth, we investigate the changes in the localization of the anterior wall of the maxillary sinus and maxillary tuberosity, analyze the development of the maxilla, and detect the bone mass of the maxilla and development timing. However, the use of Auto-CAD software has not been reported to localize the anterior wall of the maxillary sinus and maxillary tuberosity.
OBJECTIVE: To investigate the localization and growth of the anterior wall of the maxillary sinus and maxillary tuberosity in 300 children aged 4-14 years from the Han ethic group in Urumqi, Xinjiang Uygur Autonomous Region, China.
METHODS: Totally 300 children, 4-14 years of age, admitted at the Stomatological Hospital of Urumqi, Xinjiang Uygur Autonomous Region, China, were enrolled. According to Hellman’s dental developmental staging, these children were divided into five groups: groups IIA, IIC, IIIA, IIIB, IIIC. Auto-CAD software was used to analyze the panoramic radiographs of the maxilla and mandible. The tracing of each radiograph was digitized by translating the reference points onto an X-Y coordinate system. The straight line that passed the point where the nasal septum intersected with the hard palate (point O) and the point where the medial wall of maxillary sinus intersected with the hard palate (point PA) was designated as the X axis. The straight line that was vertical to the X axis and passed through the point O at a right angle was designated as the Y axis. The X and Y coordinate values of reference point were calculated. And then O point was set as (0, 0), and the point where the posterior wall of maxillary tuberosity intersected with the hard palate (PP) was set as (PPX, PPY). Collected data were analyzed statistically to understand the changes in the localization of PA and PP at different stages of dental development.
RESULTS AND CONCLUSION: The change of point PA had on significant differences between the five groups (α > 0.05). Point PP grew obviously in a horizontal rearward and vertical downward manner from stage IIA to IIIA; this point only presented a horizontal rearward growth from stage IIIA to IIIB and only a vertical downward growth from stage IIIB to IIIC. This period was the time of the second molar eruption, indicating that the second molar eruption is helpful to the vertical growth of the maxilla.