摘要
目的:探讨利用微螺钉种植体支抗压低上颌伸长磨牙的效果。方法:利用微螺钉种植体作为支抗压低10例成年患者的12颗伸长上颌磨牙。分别在患牙颊侧近中、远中及腭侧骨板各植入1枚自攻微螺钉种植体,即刻负载0.981~1.962 N,通过X线头影测量、模型分析比较矫治前后相关参数的变化情况。结果:12颗磨牙均得到了有效的压低,压低(2.7±1.2) mm,压低时间(6.5±3.2)个月。与矫治前比较,U6-PP、U7-PP明显降低(t =9.659,7.730,P<0.001),而U6-RL、U7-RL、U6-PP角和U7-PP角的变化差异均无统计学意义(P>0.05)。模型测量指标L、W和H治疗前后差异无统计学意义(P>0.05)。结论:微螺钉种植体支抗能有效地压低磨牙,为磨牙伸长的修复前矫治提供了可靠的方法。
Aim:To evaluate the effectiveness of micro-screw anchorage for intrusion of maxillary over-erupted molars . Methods:Ten adult patients were treated with the use of the micro-screw as skeletal anchorage for intrusion of 12 over-e-rupted molars.Micro-screws were inserted into mesial-buccal,distal-buccal and palatal alveolar bone of the over-erupted molars,then a force of 0.981-1.962 N was applied immediately.Cephalometric and cast analysis were carried out and comparisons of related parameters before and after treatment were then done .Results:The over-erupted molars were all in-truded successfully by (2.7 ±1.2) mm.The average period of treatment was (6.5 ±3.2) months.U6-PP and U7-PP sig-nificantly decreased (t=9.659,7.730,P〈0.001), while U6-RL,U7-RL,the angle between U6-PP and that between U7-PP did not show significant difference compared with pre-intrusion(P〉0.05).There were no significant changes in the cast parameters (L, H,and W)(P〉0.05).Conclusion:Micro-screw anchorage is effective in the intrusion of maxillary over-erupted molars .
出处
《郑州大学学报(医学版)》
CAS
北大核心
2013年第5期652-654,共3页
Journal of Zhengzhou University(Medical Sciences)
基金
河南省卫生厅基金资助项目200903077
关键词
微螺钉种植体支抗
伸长磨牙
压低
micro-screw anchorage
over-erupted molar
intrusion