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目的微种植体支抗在成人安氏Ⅱ类Ⅰ分类错上齿槽前部垂直向过度发育矫治中的应用。方法收集成人安氏Ⅱ类Ⅰ分类错上齿槽前部垂直向过度发育者32例,用微种植支抗结合MBT矫正器进行矫正,观察矫治前后硬组织、软组织、模型指标的变化,并进行统计分析。结果矫正后前牙明显压低、内收、牙冠变短,覆颌和覆盖明显改善,软组织指标Stoms-U1、ULP、LLP、露龈宽度明显变小,U1/PP角、鼻唇角、Z角明显增大,与治疗前比较差异均有高度统计学意义(P<0.01),而磨牙无明显移位(P>0.05)。结论微种植支抗能有效压低前牙,阻止前牙飘移,矫治安氏Ⅱ类Ⅰ分类错上齿槽前部垂直向过度发育效果显著。
Application of purpose micro - implant anchorage in orthodontic treatment of anterior alveolar anterior superior Class Ⅱ division Ⅰ malocclusion. Methods Thirty - two cases of vertical overgrowth in the anterior groove of Class Ⅱ division Ⅰ malocclusion in adults were collected and treated with micro - implant support combined with MBT braces to observe the change of hard tissue, soft tissue and model indexes before and after treatment conduct statistical analysis. Results The anterior teeth were significantly reduced, the adduction and crowns were shorter, the overlying jaws and coverage were significantly improved, and the soft tissue indexes such as Stoms-U1, ULP and LLP were obviously smaller, and the widths of U1 / PP, (P <0.01), while there was no obvious displacement of molar (P> 0.05). Conclusion Micro-implant support can effectively depress the anterior teeth, prevent the anterior teeth from drifting, and correct the vertical over-development of the anterior teeth of Class Ⅱ division Ⅰ malocclusion.