![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
某患者上颌牙列缺损,下颌为天然牙列,曾做上颌可摘局部义齿修复,但义齿反复折断,此次要求重新修复,口腔检查上颌仅剩右上7;右上7MOD银汞充填后,牙面低于牙合平面约1mm,不松动;右下76过长高于牙合平面约1.5mm,5舌尖较锐,右下3左下3高于牙合平面约2mm,下颌牙均不松动,下颌弓宽于上颌弓颌间距离正常。140.在修复前准备时,不应采取的措施为()
A.调磨下前牙切缘
B.拔除过长牙
C.调低过长牙
D.修整余牙外形,调磨过锐牙尖、牙嵴
E.形成良好的牙合曲线
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
B、拔除过长牙
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)