图六是上颌第二磨牙CT冠状切面（不是同一个病人），鄂侧根高于上颌窦底板大约五六毫米. 

Fig.6 is a coronal section of an upper 2nd molar of another patient.  It shows that the palatal apex is 5-6 mm above the sinus floor.

种植体在上颌窦中吗？ Is the Implant in the Sinus?

Xin Wei, DDS, PhD, MS 1st edition 10/13/2013, last revision 10/28/2017