中国实用口腔科杂志

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无托槽隐形矫治技术推磨牙向远中牙齿移动类型的研究

幸 丹12,曹 丽2,谢贤聚2   

  1. 1. 中国康复研究中心口腔科,北京 100068;2. 首都医科大学附属北京口腔医院正畸科,北京  100050
  • 出版日期:2020-05-15 发布日期:2020-05-25

  • Online:2020-05-15 Published:2020-05-25

摘要: 目的 研究无托槽隐形矫治技术推磨牙向远中牙齿移动的类型。方法 选取2016年3月至2018年10月于首都医科大学附属北京口腔医院正畸科就诊的患者58例,所有患者均采用无托槽隐形矫治技术推磨牙向远中。治疗前后均拍摄头颅侧位片及曲面体层片,分别测量上下颌第一、二磨牙远移量及牙长轴倾斜度。结果 治疗前后上下颌第一、二磨牙到翼肌垂直平面(PTV)的距离比较,差异均有统计学意义(均P < 0.05);治疗后上颌第一磨牙向远中移动(1.28 ± 1.24)mm,上颌第二磨牙向远中移动(2.47 ± 1.77)mm,下颌第一磨牙向远中移动(1.77 ± 1.20)mm,下颌第二磨牙向远中移动(2.83 ± 1.39)mm。治疗前后曲面体层片中的上下颌第一、二磨牙牙长轴与双侧眶下缘基准平面所成角比较,差异均无统计学意义(均P > 0.05)。治疗前后头颅侧位片中上颌磨牙与前颅底平面(SN平面)所成角及下颌磨牙与下颌平面(MP平面)所成角比较,差异均无统计学意义(均P > 0.05)。结论 本研究初步证实了无托槽隐形矫治技术推磨牙向远中时磨牙是整体移动的,而非倾斜移动。

关键词: 推磨牙向远中, 无托槽隐形矫治

Abstract: Objective To evaluate the type of tooth movement of molars in distalization with aligner orthodontics. Methods Totally 58 patients with aligner orthodontics were selected. Cephalometreic lateral and panoramic radiographs were taken before and after orthodontic treatment. The distance of maxillary and mandibular molar to PTV and molar inclination wrer obtained. Results There was statistical difference in the distance between molars and the PTV(P < 0.05). The distalization of the maxillary first and second molars were(1.28 ± 1.24)mm and(2.47 ± 1.77)mm,and the mandibular first and second molars were(1.77 ± 1.20)mm and(2.83 ± 1.39)mm. There was no statistical difference in mesio-distal inclination of molars during distalization treatment(P > 0.05). Conclusion The molars undergo bodily movement in distalization with aligner orthodontics.

Key words: molar distalization, aligner orthodontics