口腔医学研究 ›› 2021, Vol. 37 ›› Issue (6): 543-548.DOI: 10.13701/j.cnki.kqyxyj.2021.06.014

• 口腔正畸学研究 • 上一篇    下一篇

MSE骨性扩弓后上颌牙根及颊侧齿槽骨吸收状况的CBCT分析

郑如松1, 李岩涛2*, 王兰珠2, 生安菊2   

  1. 1.日照口腔医院正畸科 山东 日照 276800;
    2.日照市中医医院口腔科 山东 日照 276800
  • 收稿日期:2021-01-04 出版日期:2021-06-28 发布日期:2021-06-17
  • 通讯作者: *李岩涛,E-mail:dentistlyt@126.com
  • 作者简介:郑如松(1986~ ),男,山东日照人,硕士,主治医师,研究方向:口腔正畸。

Changes of Upper Root and Buccal Alveolar Bone Resorption after MSE: A Cone-beam CT analysis

ZHENG Rusong1, LI Yantao2*, WANG Lanzhu2, SHENG Anju2   

  1. 1. Department of Orthodontics, Rizhao Stomatology Hospital, Rizhao 276800, China;
    2. Department of Stomatology, Traditional Chinese Medicine Hospital of Rizhao, Rizhao 276800, China
  • Received:2021-01-04 Online:2021-06-28 Published:2021-06-17

摘要: 目的:分析MSE骨性扩弓治疗后上颌牙根及颊侧齿槽骨的吸收变化情况。方法:选取上颌横向发育不足(上牙弓狭窄)患者16例(年龄16~24岁;男7例,女9例)。应用MSE骨性扩弓器进行扩弓治疗,所有患者均在3个月内完成加力,扩弓结束后拍摄CBCT与扩弓前的CBCT比较,所有DICOM数据导入Mimics17.0软件进行牙齿三维重建,分析扩弓前后上中切牙,第一前磨牙,第二前磨牙,第一磨牙的牙根长度(体积)及颊侧齿槽骨高度和厚度的变化。结果:扩弓前后的CBCT对比显示:(1)所有测量牙齿的牙根长度及体积仅有轻微改变,但无统计学意义(P>0.05);(2)颊侧齿槽骨高度及厚度的测量发现支抗牙部位存在显著改变(P<0.05);非支抗牙部位的改变均无统计学意义(P>0.05)。结论:MSE骨性扩弓后未见显著牙根吸收;颊侧齿槽骨高度和厚度在支抗牙部位的吸收显著高于非支抗牙部位,为临床选择扩弓器提供一定参考依据。

关键词: 快速扩弓, 牙根吸收, CBCT

Abstract: Objective: To determine the changes of upper root and buccal alveolar bone resorption after MSE expander by cone-beam CT (CBCT). Methods: This study included 16 patients (7 males and 9 females ranged from 16 to 24years) with narrow upper arch treated with MSE. CBCT images were taken before and after expansion. All Dicom data were imported Mimics17.0 software and reconstructed. The root length and alveolar bone height/thickness were compared and measured, respectively. Statistical analysis were performed using paired t-test. Results: The CBCT measurements were as follows: (1)There was only slight change in all measured root length, but no statistical significance (P>0.05); (2)The buccal alveolar bone height and thickness showed significant changes in anchorage teeth, but there was no significant change in non-anchorage teeth (P>0.05). Conclusion: No significant root resorption was found after MSE treatment. The alveolar height and thickness resorption was more severe in the anchorage teeth than in the non-anchorage teeth, which provided reference for clinical selection of dental expander types.

Key words: rapid maxillary expansion, root resorption, cone-beam CT