中国组织工程研究

中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (2): 247-251.doi: 10.12307/2023.988

• 口腔组织构建 oral tissue construction • 上一篇    下一篇

舌侧活动翼不同翼拉伸长度内收下前牙的生物力学特征

张国瑞，张坤武，陈文远锋，刘一宁，李都红，张新竺，曹宝成   

  1. 兰州大学口腔医院，甘肃省兰州市  730000
  • 收稿日期:2022-11-22 接受日期:2023-01-16 出版日期:2024-01-18 发布日期:2023-06-30
  • 通讯作者: 曹宝成，博士，博士生导师，主任医师，兰州大学口腔医院，甘肃省兰州市 730000
  • 作者简介:张国瑞，男，1997年生，甘肃省天水市人，汉族，兰州大学在读硕士，主要从事口腔正畸学临床工作，接触不同类型错牙合畸形患者近百例。目前主要研究舌侧活动翼的临床及力学研究。
  • 基金资助:
    甘肃省级重点研发基金项目(20YF8YA071)

Effect of different stretching lengths of lingual movable wing on the adduction of mandibular anterior teeth: a biomechanical study

Zhang Guorui, Zhang Kunwu, Chen Wenyuanfeng, Liu Yining, Li Duhong, Zhang Xinzhu, Cao Baocheng   

  1. Stomatological Hospital of Lanzhou University, Lanzhou 730000, Gansu Province, China
  • Received:2022-11-22 Accepted:2023-01-16 Online:2024-01-18 Published:2023-06-30
  • Contact: Cao Baocheng, MD, Doctoral supervisor, Chief physician, Stomatological Hospital of Lanzhou University, Lanzhou 730000, Gansu Province, China
  • About author:Zhang Guorui, Master candidate, Stomatological Hospital of Lanzhou University, Lanzhou 730000, Gansu Province, China
  • Supported by:
    Gansu Provincial Key Research and Development Fund Project, No. 20YF8YA071 (to CBC)

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摘要：


文题释义：

舌侧活动翼矫治器：一种新型舌侧矫治器，该矫治器可以紧密贴合在牙齿舌侧面，依赖其可以在一定长度内自由拉伸的活动侧翼，在内收阶段影响前牙转矩控制效果。
有限元分析：通过计算机模拟真实物理体系，并将一个连续体离散为多个有限元单元，对模型进行约束、加载后，计算任意部位的应力、应变和位移情况。


背景：舌侧活动翼矫治技术是一种新型舌侧矫治技术，不同翼的拉伸长度影响前牙转矩控制效果，目前尚无相关的生物力学研究。

目的：探讨舌侧活动翼矫治技术内收下前牙时牙列的位移趋势以及不同翼拉伸长度对下颌前牙生物力学效应的影响。
方法：利用锥形束CT 采集患者下颌骨以及下牙列数据信息，通过 Mimics 软件进行三维重建，建立舌侧活动翼内收下前牙的三维有限元模型。在 ANSYS 软件中分别分析工况 A(2 mm拉伸长度)、工况 B(2.5 mm拉伸长度)、工况 C(3 mm拉伸长度)和工况 D(3.5 mm拉伸长度)时下颌前牙的初始位移。

结果与结论：①下牙列初始位移趋势：中切牙舌向倾斜移动伴有压低，侧切牙、尖牙轻度舌侧移动伴近中舌向扭转，第二前磨牙远中倾斜并伴有明显舌倾，第一磨牙整体表现为近中倾斜并伴有近中牙冠外翻。因此在下颌拔牙内收病例中，对第二前磨牙的舌向移动应给予重视，临床中可以通过相应的技术予以抵消。②前牙各方向位移趋势：从工况 A到工况 D，矢状方向：中切牙冠根位移差值由-11.891 μm变为-5.757 4 μm，表示中切牙由倾斜移动向整体移动转变；侧切牙冠根位移差值由-11.828 1 μm变为-6.711 45 μm，尖牙冠根位移差值由-7.572 3 μm变为-4.695 5 μm，表示侧切牙及尖牙的倾斜移动也在向整体移动转变。垂直方向：从工况 A到工况 D，切牙的压低量逐渐增大，尖牙的压低量逐渐减小。结果表明，翼的拉伸长度会影响前牙的倾斜移动趋势；随着翼的不断拉伸，下前牙的转矩控制效果越好。

https://orcid.org/0000-0002-1628-4584(张国瑞)；https://orcid.org/0000-0003-0839-4027(曹宝成)

中国组织工程研究杂志出版内容重点：组织构建；骨细胞；软骨细胞；细胞培养；成纤维细胞；血管内皮细胞；骨质疏松；组织工程

关键词: 舌侧活动翼矫治技术, 三维有限元, 生物力学, 下前牙, 转矩, 位移趋势, 传统舌侧技术, 内收

Abstract: BACKGROUND: Lingual movable wing is a new type of lingual orthodontic technique and the different stretching lengths of the wring affect the torque control effect of anterior teeth. However, there is yet no related biomechanical research. 
OBJECTIVE: To investigate the displacement trend of dentition during adduction of mandibular anterior teeth and the effect of different wing stretching lengths on the biomechanical effect of mandibular anterior teeth. 
METHODS: The data of the mandible and lower dentition were collected by cone-beam CT and reconstructed using Mimics software to establish a three-dimensional finite element model of mandibular anterior teeth adducted by the lingual movable wing. The ANSYS software was used to analyze the initial displacement of the mandibular anterior teeth under the following conditions: A, 2 mm stretching length; B, 2.5 mm stretching length; C, 3 mm stretching length; and D, 3.5 mm stretching length.
RESULTS AND CONCLUSION: The trend of initial displacement of lower dentition: The central incisors moved lingually with depression, the lateral incisors and canines moved mildly lingually with mesial lingual torsion, the second premolar was tilted distally with a marked lingual inclination and the first molar showed an overall mesial inclination with mesial crown eversion. Therefore, in the adduction cases of mandibular tooth extraction, attention should be paid to the lingual movement of the second premolar, which could be offset by corresponding techniques in clinic. The trend of anterior tooth displacement in all directions: from condition A to condition D, in the sagittal direction, the difference value in crown-root displacement of central incisors changed from -11.891 μm to -5.757 4 μm, indicating that the central incisor changes from oblique movement to overall movement. The difference value in crown-root displacement of lateral incisors changed from -11.828 1 μm to -6.711 45 μm, and that of canines changed from -7.572 3 μm to  -4.695 5 μm, indicating that the oblique movement of the lateral incisors and canines is also changing to an overall movement. In the vertical direction, from condition A to condition D, the reduction of incisors was gradually increased, while that of canines was gradually decreased. These findings indicate that the stretching length of the wing can affect the oblique movement trend of the anterior teeth. As the wing continues to stretch, the torque control of the lower anterior teeth will become better.

Key words: lingual movable wing correction technique, three-dimensional finite element, biomechanics, mandibular anterior tooth, torque, displacement trend, traditional lingual technique, adduction

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