Sinus lift is indistinct 15 months postop (Fig.5,6), probably due to radiation overexposure, although placement trajectory is good.虽然上颌窦里骨粉不见了，植体卡在窦底目的达到了。

Sinus lift with Regular Drills Last Next  导板与提升

Xin Wei, DDS, PhD, MS 1st edition 05/05/2020, last revision 02/14/2021