Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (13): 2362-2365.doi: 10.3969/j.issn.1673-8225.2011.13.020

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Selection and application of multi-slice CT 3D reconstruction techniques in assisting mini-implant ahchorage implant surgery

Chen Jing-yi1, Wu Xiao-wei2, Zhang Hong-gang3, Jiao Jian-jun1, Zhang Xue-qiang1, Yao Chuan-chen4   

  1. 1Department of Stomatology, 2Department of Radiology, Handan Central Hospital, Handan  056001, Hebei Province, China; 3Affiliated Hospital of Hebei University of Engineering, Handan  056001, Hebei Province, China; 4Handan Fourth Hospital, Handan  056200, Hebei Province, China
  • Received:2010-12-24 Revised:2011-02-10 Online:2011-03-26 Published:2013-10-23
  • About author:Chen Jing-yi★, Master, Associate chief physician, Department of Stomatology, Handan Central Hospital, Handan 056001, Hebei Province, China ccy0712@yahoo.com.cn

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Abstract:

BACKGROUND: The key method to improve the stability of miniscrew orthodontic anchorage system is accurate preoperative bone mass evaluation in the implant region. Routine 2D image examinations such as periapical radiography and panoramic tomography and lateral cephalometric radiography have limitations.
OBJECTIVE: To analyze the traits and advantages of various multi-slice CT (MSCT) reconstruction images in assisting miniscrew anchorage surgery to improve the stability of miniscrew.
METHODS: Preplant MSCT scanning and various images reconstruction were made and helped to exam the peri-implant bone mass and density and the anatomical relation to important structures comprehensively. According the implant anchorage angles in MSCT images accurately designed by computer, the tunnel-type surgical template was made to assist 32 miniscrews implant surgery. Then the skulls of two pigs were rescanned by MSCT. After dissected the pig alveolar process, the MSCT preoperative designed angles, the MSCT postoperative measured angles and the measured angles of anatomic bone samples were analyzed statistically.
RESULTS AND CONCLUSION: The 32 miniscrews were implanted successfully. They did not damage dental roots or surrounding important structures. Compared MSCT preoperative designed angles with MSCT postoperative measured angles and anatomic bone samples measured angles, there were no significant differences in axial sections or cross-sections (P > 0.05), and the r concordance correlations were very good. Results show that MSCT can provide accurate and abundant image information. Exact selection and application can help to fully attain the objects of imaging examination on miniscrew anchorage surgery, thus improving the success rate of miniscrews.

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