口腔医学研究

口腔医学研究 ›› 2023, Vol. 39 ›› Issue (4): 341-344.DOI: 10.13701/j.cnki.kqyxyj.2023.04.011

• 口腔正畸学研究 • 上一篇    下一篇

上颌全牙列远移中牙周膜的应力分析

蒋啸宇1, 朱杰晶2, 王栋才3, 任艳云1*   

  1. 1.中国人民解放军联勤保障部队第九〇三医院 浙江 杭州 310000;
    2.杭州口腔医院城西院区 浙江 杭州 310000;
    3.浙江工业大学机械工程学院 浙江 杭州 310000
  • 收稿日期:2022-09-26 出版日期:2023-04-28 发布日期:2023-04-19
  • 通讯作者: *任艳云,E-mail: shuxiangrensheng@163.com
  • 作者简介:蒋啸宇(1993~ ),男,浙江东阳人,医师,本科,研究方向:口腔正畸。

Stress Analysis of Periodontal Membrane in Distal Maxillary Dentition

JIANG Xiaoyu1, ZHU Jiejing2, WANG Dongcai3, REN Yanyun1*   

  1. 1. 903 Hospital of Joint Logistic Support Force of Chinese People's Liberation Army, Hangzhou 310000, China;
    2. West Branch of Hangzhou Stomatological Hospital, Hangzhou 310000, China;
    3. School of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310000, China
  • Received:2022-09-26 Online:2023-04-28 Published:2023-04-19

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摘要： 目的: 探讨利用三维有限元技术,分析不同负载模式下上颌全牙列远移的过程中各牙齿的牙周膜应力分布及牙根吸收的危险区域。方法: 建立包括上颌骨,上牙列,牙周膜等的三维有限元模型。模拟微种植钉联合镍钛拉簧远移全牙列,通过控制不同的牵引方向(一共12组),记录并分析上颌牙列中各牙齿的牙周膜应力情况。结果: 牵引钩高度0 mm,位置侧切牙、尖牙之间或者尖牙、第一前磨牙之间,种植钉高度0 mm或7 mm,这4种模式所受到的力系统在这12组结果中是比较均匀的,各个牙齿牙周膜所受到的应力在适度范围内,且牙列在矢状方向移动的效率较高。结论: 牵引力与弓丝平行时(23-0-0、34-0-0),所受到的力系统比较均匀的,各个牙齿牙周膜所受到的应力在适度范围内,且牙列在矢状方向移动的效率较高。磨牙区不容易出现压力过大区域,前牙区容易出现,可能和解剖及位置相关。牵引钩附近的牙齿是牙根吸收的危险区域。不建议高位种植钉和高位牵引钩一起使用,注意侧切牙及尖牙垂直向受力。

关键词: 三维有限元, 微种植钉, 牙周膜应力, 牙根吸收

Abstract: Objective: To investigate the distribution of periodontal stress and the risk area of root resorption in the maxillary whole dentition with different loading modes by using three-dimensional finite element technique. Methods: Three dimensional finite element models including maxilla, upper dentition, and periodontal membrane were established. The periodontal stress of each tooth in the maxillary dentition was recorded and analyzed by controlling different traction directions (a total of 12 groups). Results: The traction hook height was 0 mm, implant position located between lateral incisors and canines or between canines and first premolars, and the micro-implant length was 0 mm or 7 mm were relatively uniform in the 12 groups. The periodontal stress of each tooth was within a moderate range, and the efficiency of the dentition moving in the sagittal direction was high. Conclusion: When the traction force is parallel to the arch wire (23-0-0, 34-0-0), the force system is relatively uniform, the periodontal membrane of each tooth is subjected to a moderate range of stress, and the efficiency of the dentition moving in the sagittal direction is high. The molars area is not prone to excessive pressure, while the anterior teeth area is prone to excessive pressure, which may be related to the anatomy and location. The tooth near the hook is a risk area for root resorption. It is not recommended to use the high micro-implant and high traction hook together, and pay attention to the vertical force on the lateral incisors and canines.

Key words: three dimensional finite element, micro-implant, periodontal membrane stress, root absorption