上颌斜面导板在增强支抗和调整咬合中的应用

目的探讨上颌斜面导板在加强下前牙支抗及治疗末期调整后牙尖窝关系中的作用。方法选择需下颌后牙前移而下前牙不能过多后移或治疗后期后牙尖窝关系不理想的患者62例,其中29例戴用上颌斜面导板加强下前牙支抗或治疗末期调整后牙尖窝关系,33例未戴用上颌斜面导板,对两组治疗前后的头颅侧位片进行测量并对组内和组间的差异进行统计学分析。结果上颌斜面导板能增强下前牙支抗,在关闭下前牙或下后牙间隙时,斜面导板阻挡下前牙,防止下前牙舌倾及后移,保证前牙覆牙合、覆盖正常。上颌斜面导板还可打开后牙咬合,使上下颌后牙脱离锁结,便于后牙前移及后牙尖窝关系的调整。结论上颌斜面导板能缩短治疗时间,使治疗效果更理想。

The New Effect OF maxillary Inclined Guide plate on Orthodontics with Fixed Appliance

Objective To study the effect of maxillary inclined guide plate on reinforcing the anchorage of lower anterior teeth and adjusting the intercuspation of posterior teeth at the end of treatment.Methods There are 62 cases,which should shift forward the lower posterior teeth but not retrude the lower anterior teeth more,or whose posterior intercuspation were not ideal.29 cases of them were treated with maxillary inclined guide plate and 33 cases without it.At last,we measured their cephalogram both pre-and post-treament,and then analysed the innergroup and intergroup's difference by statistics method.Results Maxillary inclined guide plate can reinforce the anchorage of lower anterior teeth evidently,it can protect the lower anterior teeth from retruding and inclining lingually when closed the spaces between lower teeth,so that we can maintain the normal overbite and overjet of anterior teeth.Besides this,the disclusion of posterior teeth can also make it easily to shift forward the posterior teeth and adjust the intercuspation.Conclusion Maxillary inclined guide plate can short the treatment time and optimize the outcome.