下颌第二磨牙长距离近中移动牙根吸收的研究

doi:10.13701/j.cnki.kqyxyj.2020.06.023

口腔医学研究 ›› 2020, Vol. 36 ›› Issue (6): 603-606.DOI: 10.13701/j.cnki.kqyxyj.2020.06.023

• 口腔正畸学研究 • 上一篇

下颌第二磨牙长距离近中移动牙根吸收的研究

潘恩僦¹, 杜庆玲¹, 朱杰晶¹, 邹明媛¹, 弓国梁², 林新平^1,2*

1.浙江中医药大学口腔医学院浙江杭州 310000;
2.杭州牙博艺口腔门诊部浙江杭州 310000

收稿日期:2020-02-14 出版日期:2020-07-03 发布日期:2020-07-06
通讯作者: ^*林新平,E-mail: xplinzju@163.com
作者简介:潘恩僦(1995~ ),男,浙江温州人,硕士在读,研究方向:口腔正畸学。

Study on Root Resorption of Mandibular Second Molars with Long Distance Mesialization

PAN Enjiu¹, DU Qingling¹, ZHU Jiejing¹, ZOU Mingyuan¹, GONG Guoliang², LIN Xinping^1,2*

1. School of Stomatology, Zhejiang Chinese Medical University, Hangzhou 310000, China;
2. Hangzhou Yaboyi Oral Clinic, Hangzhou 310000, China

Received:2020-02-14 Online:2020-07-03 Published:2020-07-06

摘要/Abstract

摘要： 目的: 探究下颌第二磨牙长距离(≥5 mm)近中移动后牙根吸收情况。方法: 回顾性分析了36例完成病例,共45颗下颌第二磨牙。采用直接数字化全景片测量正畸前后磨牙牙根长度及轴倾角度变化。根据磨牙初始轴倾度分为A组(轴倾度<86.42°)、B组(轴倾度≥86.42°);根据轴倾度改变量分为C组(变化<10°)、D组(变化≥10°)。计算牙根吸收量并分析轴倾度对其的影响。结果: 正畸前后下颌第二磨牙牙根长度缩短(P<0.01);近中、远中牙根吸收量接近(P>0.05);平均牙根吸收量为(0.97±0.40) mm。A组、B组牙根吸收量组间对比无统计学意义(P>0.05);C组、D组仅在远中牙根吸收量上对比有统计学意义(P<0.05)。结论: 下颌第二磨牙长距离近中移动后牙根吸收量较小,一般不具有临床意义。磨牙轴倾度改变量对远中牙根吸收存在一定影响,磨牙缺失后应尽早开始正畸治疗。

关键词: 下颌第二磨牙, 磨牙近中移动, 牙根吸收, 轴倾度

Abstract: Objective: To explore the root resorption of mandibular second molars after long distance (≥5mm) mesialization. Methods: A total of 45 mandibular second molars in 36 completed cases were retrospectively analyzed. The root length and axis inclination angle of the orthodontic molars were measured by direct digital panorama. According to the initial axial inclination of the molars, they were divided into group A (axial inclination <86.42°) and group B (axial inclination ≥86.42°). According to the change of axial inclination, they were divided into group C (change <10°) and group D (change ≥10°). The root resorption was calculated and the effect of axis inclination on root resorption was analyzed. Results: The root length was shortened (P<0.01). The mesial and distal root resorption values were approximately (P>0.05). The average root resorption was (0.97±0.40) mm. There was no significant difference between group A and group B in root resorption (P>0.05). Group C and group D had statistical significance only in the amount of distal root resorption (P<0.05). Conclusion: The root resorption of mandibular second molars after long distance mesialization is small and generally has no clinical significance. The change of axial inclination of the molars has a certain effect on the root resorption of the distal root. Orthodontic treatment should be started as soon as possible after the molar loss.

Key words: mandibular second molars, molar mesialization, root resorption, axis inclination

潘恩僦, 杜庆玲, 朱杰晶, 邹明媛, 弓国梁, 林新平. 下颌第二磨牙长距离近中移动牙根吸收的研究[J]. 口腔医学研究, 2020, 36(6): 603-606.

PAN Enjiu, DU Qingling, ZHU Jiejing, ZOU Mingyuan, GONG Guoliang, LIN Xinping. Study on Root Resorption of Mandibular Second Molars with Long Distance Mesialization[J]. Journal of Oral Science Research, 2020, 36(6): 603-606.

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下颌第二磨牙长距离近中移动牙根吸收的研究

Study on Root Resorption of Mandibular Second Molars with Long Distance Mesialization

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