不等抗力偶直立下颌高位近中阻生第二磨牙的临床研究

doi:10.13591/j.cnki.kqyx.2023.09.007

口腔医学 ›› 2023, Vol. 43 ›› Issue (9): 803-807.doi: 10.13591/j.cnki.kqyx.2023.09.007

不等抗力偶直立下颌高位近中阻生第二磨牙的临床研究

马晓晴¹,孙建锋²,叶茂¹,邢允波¹,邓学韬¹,朱梦娇¹,许衍³()

1 上海市徐汇区牙病防治所口腔正畸科,上海(200032)
2 宁波口腔医院生物材料与组织再生工程实验室,浙江宁波(315000)
3 上海市口腔医院口腔正畸科,上海市颅颌面发育与疾病重点实验室,上海(200001)

修回日期:2023-03-30 出版日期:2023-09-28 发布日期:2023-09-28
通讯作者: 许衍 E-mail:orthoxuyan_kq@fudan.edu.cn
基金资助:
上海市卫生健康委员会面上项目(202040495);徐汇区医学科研项目(SHXH201915)

A clinical study on the asymmetric couple in uprighting the highly and mesially impacted mandibular second molar

MA Xiaoqing¹,SUN Jianfeng²,YE Mao¹,XING Yunbo¹,DENG Xuetao¹,ZHU Mengjiao¹,XU Yan³()

Department of Orthodontics, Shanghai Xuhui District Dental Center, Shanghai 200032, China

Revised:2023-03-30 Online:2023-09-28 Published:2023-09-28

摘要/Abstract

摘要：

目的评价不等抗力偶系在直立下颌高位近中阻生第二磨牙时的临床疗效。方法选择下颌第二磨牙近中高位阻生青少年病例18例。在同侧第一磨牙颊侧外斜线植入微种植钉1枚,种植钉与同侧后牙段形成支抗侧,在第二磨牙远颊放置小方管,NiTi片段弓就位后双侧形成不对称力偶,待其基本直立后调整颊管至正常位置改善咬合。采用Graphpad Prism 6.0 软件包对治疗前、后数据进行配对t检验。结果所有倾斜磨牙均直立,治疗过程中无咬合干扰,治疗结束局部咬合关系良好,无牙根吸收。相邻第一磨牙远中牙槽骨高度明显增加,其近中颊尖到下颌平面的垂直距离保持稳定。结论微种植钉联合NiTi片段弓形成的不等抗力偶系可有效直立下颌高位近中阻生第二磨牙,并有效控制其垂直向位置。

关键词: 微种植钉, 磨牙近中倾斜, 不等抗力偶, NiTi片段弓

Abstract:

Objective To evaluate the clinical efficacy of asymmetric couple in uprighting the highly and mesially impacted mandibular second molar. Methods Eighteen adolescents with highly and mesially impacted mandibular second molars were selected. One miniscrew was implanted into the buccal shelf. The miniscrew and the posterior segment constituted the anchorage. The tube was bonded on the disto-buccal side of the second molar. After the NiTi segmental archwire was placed, the asymmetric couple was formed on both sides. After they were almost uprighted, the position of the buccal tube was adjusted to improve the occlusion. Graphpad prism 6.0 software package was used for paired t-test. Results All tilted molars were uprighted, and there was no occlusal interference during the treatment. The final local occlusion was good, and no obvious root resorption happened. The height of the distal alveolar bone of the adjacent first molar increased significantly, and the vertical distance from the mesial buccal cusp to the mandibular plane remained stable. Conclusion The asymmetric couple formed by miniscrew and NiTi segmental archwire can effectively erect the highly impacted mandibular second molar and control its vertical position at the same time.

Key words: miniscrew, mesially tilted molar, asymmetric couple, NiTi segment archwire

中图分类号:

R783.5

马晓晴, 孙建锋, 叶茂, 邢允波, 邓学韬, 朱梦娇, 许衍. 不等抗力偶直立下颌高位近中阻生第二磨牙的临床研究[J]. 口腔医学, 2023, 43(9): 803-807.

MA Xiaoqing, SUN Jianfeng, YE Mao, XING Yunbo, DENG Xuetao, ZHU Mengjiao, XU Yan. A clinical study on the asymmetric couple in uprighting the highly and mesially impacted mandibular second molar[J]. Stomatology, 2023, 43(9): 803-807.

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测量项目	治疗前	治疗后	差值	P
L7—MP/(°)	29.91±1.68	82.19±1.15	52.29±1.48	<0.001
L7 RT—P-MP/mm	40.93±1.38	49.89±1.62	8.96±0.62	<0.001
L7牙齿长度/mm	22.79±0.76	22.63±0.73	-0.16±0.21	0.07
L6DR—MP'/mm	21.47±0.90	29.49±1.22	8.02±0.99	<0.001
L6MBC—MP'/mm	36.20±1.13	36.50±1.18	0.30±0.57	0.06
L7PD/mm	2.98±0.39	3.18±0.36	0.21±0.51	0.11

不等抗力偶直立下颌高位近中阻生第二磨牙的临床研究

A clinical study on the asymmetric couple in uprighting the highly and mesially impacted mandibular second molar

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