Chinese Journal of Tissue Engineering Research ›› 2010, Vol. 14 ›› Issue (26): 4920-4923.doi: 10.3969/j.issn.1673-8225.2010.26.042

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Accuracy of tunnel-type template assisting mini-implant anchorage surgery based on multislice spiral computed tomography

Chen Jing-yi1, Shan Li-hua2   

  1. 1Department of Stomatology, Handan Central Hospital, Handan  056001, Hebei Province, China;
    2Department of Orthodontics, Second Hospital of Hebei Medical University, Shijiazhuang  050000, Hebei Province, China
  • Online:2010-06-25 Published:2010-06-25
  • Contact: Shan Li-hua, Doctor, Professor, Chief physician, Master’s supervisor, Department of Orthodontics, Second Hospital of Hebei Medical University, Shijiazhuang 050000, Hebei Province, China
  • 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: Preplant diagnosis and rigorous implant strategy based on multislice spiral computed tomography (MSCT) imaging can improve success rate of mini-implants as anchorage. Effective application of imaging information in implant anchorage requires reliable tools and methods.
OBJECTIVE: To investigate the accuracy of the radiographic and tunnel-type surgical templates assisting implant anchorage surgery and evaluate the clinical significance.
METHODS: The transparent radiographic templates were made with occlusal rest to assist MSCT to scan two pigs’ skulls locatively. After designed the implant anchorage angles in MSCT images accurately, we made the tunnel-type surgical template by angle data. A total of 32 miniscrews were implanted by surgical template, and the two pigs skulls were rescanned by MSCT. After dissected the pig alveolar process, the MSCT preoperative planning angles, the MSCT postoperative measurement angles and the measurement angles of anatomic bone samples were analyzed statistically. 
RESULT AND CONCLUSION: The 32 miniscrews were implanted successfully. They did not damage dental roots or surrounding important structures. Compared MSCT preoperative planning angles with MSCT postoperative measurement angles and anatomic bone samples measurement angles, there were no significant differences on axial sections or cross-sections and the r concordance correlations were very good. Results show that the radiographic and the tunnel-type surgical templates are accurate and reliable for operation and will help to improve the success rate of implant anchorage.

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