Another image of  the tooth #2 before RCT (Fig.2), showing proximity of the buccal roots.   It appears that the sinus floor is lower than all of the 3 root tips.  Sinus lift will be carried out at the septum by osteotomes and taps for more bone engagement.

Furcation of Upper 1st and 2nd Molars Last Next

Xin Wei, DDS, PhD, MS 1st edition 04/26/2015, last revision 10/21/2019