Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (41): 7635-7638.doi: 10.3969/j.issn.1673-8225.2011.41.009

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Mandibular interradicular place of beagles for microscrew implantation

Liu Wen1, Hu Yun2, Deng Feng1, Song Jin-lin1, Zheng Lei-lei1, Zhao Zhi-he3, Tang Tian3, Wang Zhi-qiang4   

  1. 1Department of Orthodontics, 2Department of Preventive Dentistry, the Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing  400015, China; 3Department of Orthodontics, West China College of Stomatology, Sichuan University, Chengdu, 610041, Sichuan Province China; 4Department of Orthodontics, Provincial Hospital Affiliated to Shandong University, Jinan  250021, Shandong Province, China
  • Received:2011-02-19 Revised:2011-04-21 Online:2011-10-08 Published:2011-10-08
  • Contact: Zheng Lei-lei, Doctor, Attending physician, Department of Orthodontics, the Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing 400015, China zheng_lei_lei@163. com
  • About author:Liu Wen★, Studying for master’s degree, Department of Orthodontics, the Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing 400015, China liuwen110616@126. com Co-first author: Hu Yun★, Master, Attending physician, Department of Preventive Dentistry, the Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing 400015, China hoo_chon@163.com
  • Supported by:

    the National Natural Science Foundation of China (Youth Program), No. 810000463*; Ph.D. Programs Foundation of Ministry of Education of China, No. 20095503120006*; Medical Key Subject Program of Chongqing*

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Abstract:

BACKGROUND: The structure of Beagle’s mandible is complex, and improper place for microscrew implantation would lead to deficiency of bone mass surrounding the microscrew and microscrew loosening.
OBJECTIVE: To study the anatomic structure of Beagle’s mandible and find out the place suitable for placing the orthodontic microscrew.
METHODS: Five male Beagles corpses were collected. The distance between P2 and M1, the distance between tooth root crotch and inferior maxillary nerve, the degree of tooth root crotch, the mesiodistal width between the roots of teeth and the buccolingual sickness from 4 mm and 6 mm beneath the top of alveolar crests were measured through the use of sliding caliper.
RESULTS AND CONCLUSION: The mean distance between P2 and M1 was 52.70 mm.The root crotch of M1 was the farthest place from inferior maxillary nerve, while the root crotch of P4 expressed the nearest. The degree of M1 root crotch was the biggest while P4 showed the smallest. The mesiodistal width between the roots of teeth 4 mm and 6 mm beneath the top of the alveolar crests all exceeded 5 mm and the buccolingual sickness increased. From 4 mm and 6 mm beneath the top of the alveolar crest, the mandibular interradicular place for microscrew implantation in Beagles was located between the mesial and distal roots of P2, P3, P4 and M1.

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