中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (27): 4288-4292.doi: 10.12307/2022.902

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

胶原纤维和基质金属蛋白酶9在大鼠正畸牙根吸收中的表达及意义

刘  珂1,范海霞2,王  宏3,程焕芝2,耿海霞2   

  1. 1潍坊医学院口腔医学院,山东省潍坊市  261053;2济宁医学院口腔医学院,山东省济宁市  272067;3济宁医学院附属医院口腔科,山东省济宁市  272067
  • 收稿日期:2021-10-09 接受日期:2021-12-17 出版日期:2022-09-28 发布日期:2022-03-11
  • 通讯作者: 耿海霞,教授,济宁医学院口腔医学院,山东省济宁市 272067
  • 作者简介:刘珂,女,1996年生,山东省潍坊市人,汉族,在读硕士,主要从事牙根吸收的基础研究。
  • 基金资助:
    济宁市科技发展计划项目(2020JKNS005),项目负责人:耿海霞;山东省医药卫生科技发展计划项目(2019WS354),项目负责人:范海霞

Expression and significance of collagen fiber and matrix metalloproteinase-9 during orthodontic root resorption in rats

Liu Ke1, Fan Haixia2, Wang Hong3, Cheng Huanzhi2, Geng Haixia2   

  1. 1School of Stomatology, Weifang Medical University, Weifang 261053, Shandong Province, China; 2School of Stomatology, Jining Medical University, Jining 272067, Shandong Province, China; 3Department of Stomatology, Affiliated Hospital of Jining Medical University, Jining 272067, Shandong Province, China
  • Received:2021-10-09 Accepted:2021-12-17 Online:2022-09-28 Published:2022-03-11
  • Contact: Geng Haixia, Professor, School of Stomatology, Jining Medical University, Jining 272067, Shandong Province, China
  • About author:Liu Ke, Master candidate, School of Stomatology, Weifang Medical University, Weifang 261053, Shandong Province, China
  • Supported by:
    Science and Technology Development Plan Project of Jining, No. 2020JKNS005 (to GHX); Medicine and Health Science and Technology Development Plan Project of Shandong Province, No. 2019WS354 (to FHX)

摘要:

文题释义:
牙根吸收:是正畸过程中伴随牙移动而发生的一种较为常见的病理性过程,主要是指牙骨质发生缺损,甚至波及牙本质。
基质金属蛋白酶9:是基质金属蛋白酶家族中的一员,属于明胶酶,它不仅可以参与降解牙周组织中的胶原纤维,在炎症反应过程中可发挥蛋白水解酶作用。
胶原纤维:牙周组织中细胞外基质的重要组成部分,包括Ⅰ型胶原和Ⅲ型胶原。在牙齿移动过程中,Ⅰ型胶原可对机械力产生应变,保持牙齿的稳定性,而Ⅲ型胶原可缓解牙齿受到的牵张力。

背景:牙根吸收是正畸治疗中最常见的并发症,也是当前正畸研究中的热点,目前关于牙根吸收过程中不同时间点下牙周组织胶原纤维的重塑过程及其与基质金属蛋白酶9的关系尚不清楚。
目的:研究在正畸源性牙根吸收过程中,压力侧不同时间点牙周组织中胶原纤维重塑和基质金属蛋白酶9的表达情况。
方法:选取30只8周龄雄性Wistar大鼠,牵拉左侧上颌第一磨牙向近中移动,建立正畸牙移动模型(实验组),右侧第一磨牙不做任何处理(对照组)。加力后1,3,5,7,14,21 d,利用组织形态学技术观察分析牙槽骨和牙根表面、牙周组织胶原纤维变化以及基质金属蛋白酶9表达情况。
结果与结论:①苏木精-伊红染色和Masson三色染色证实,与对照组相比,加力后不同时间点实验组牙槽骨和牙根表面均发生不同程度的牙根吸收,牙周组织胶原纤维发生结构重构,在7,21 d重构最显著,并且随加力时间延长单位面积内胶原纤维表达先减少后增多;②免疫组织化学染色证实,与对照组相比,实验组基质金属蛋白酶9表达增多,随加力时间延长基质金属蛋白酶9表达量呈现先增多后减少的趋势;Pearson相关分析显示,基质金属蛋白酶9与牙周组织胶原纤维的表达具有负相关性(r=-0.933,P < 0.01);③结果说明,在大鼠正畸牙牙根吸收过程中,随加力时间延长牙周组织中胶原纤维呈现动态变化,基质金属蛋白酶9的表达水平与胶原纤维的动态变化和牙根吸收活动的变化趋势有关。

https://orcid.org/0000-0001-7463-491X (刘珂) 

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料;口腔生物材料;纳米材料;缓释材料;材料相容性;组织工程

关键词: 正畸牙移动, 牙根吸收, 基质金属蛋白酶9, 胶原纤维, 动物模型, 正畸力, 大鼠

Abstract: BACKGROUND: Root resorption is the most common complication in orthodontic treatment, and is also a hot topic in current orthodontic research. Currently, the remodeling process of collagen fibers in the inferior periodontal tissue and its relationship with matrix metalloproteinase-9 remain unclear at different time points during root resorption.
OBJECTIVE: To investigate the remodeling of collagen fibers and the expression of matrix metalloproteinase-9 in the inferior periodontal tissue at different time points on the pressure side during orthodontic root resorption.
METHODS: Thirty eight-week-old male Wistar rats were selected, and the orthodontic tooth movement model was established by pulling the left maxillary first molars towards the near middle in the experimental group, and the right side was not treated as the control group. The changes of collagen fibers and expression of matrix metalloproteinase-9 in alveolar bone, root surface and periodontal tissue at 1, 3, 5, 7, 14, and 21 days were observed and analyzed by histomorphology after force application. 
RESULTS AND CONCLUSION: (1) Hematoxylin-eosin staining and Masson's trichrome staining results confirmed that compared with the control group, the alveolar bone and tooth root surface of the experimental group had different degrees of resorption. The periodontal tissue collagen fibers underwent structural remodeling. The remodeling was most significant at 7 and 21 days. The expression of collagen fibers per unit area decreased first and then increased with the extension of the force. (2) Immunohistochemical staining confirmed that compared with the control group, the expression of matrix metalloproteinase-9 in the experimental group increased. The expression level showed a trend of first increasing and then decreasing with the extension of the application time. Pearson correlation analysis confirmed that the matrix metalloproteinase-9 expression was negatively correlated with the expression of collagen fibers in periodontal tissues (r=-0.933, P < 0.01). (3) The above results indicate that during orthodontic tooth root resorption in rats, the collagen in periodontal tissues is prolonged with time of stress. The expression level of matrix metalloproteinase-9 is related to the dynamic changes of collagen fibers and the changing trend of tooth root resorption.

Key words: orthodontic tooth movement, root resorption, matrix metalloproteinase-9, collagen fiber, animal model, orthodontic force, rat

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