Fig.7: CBCT sagittal section. 

Bone density at #19 seems to be low.  Be ready for underprep.  Place an implant at the site prior to extraction of #18 for position reference, although a surgical stent will be available for the region.

Extraction of the horizontally impacted #17 should be traumatic and should be avoided.  After extraction of the tooth #18, place a shorter, wider (as compared to that at #19) implant at the mesial socket.

Mesial Socket Implant Placement at Lower 2nd Molar

Xin Wei, DDS, PhD, MS 1st edition 07/10/2016, last revision 07/10/2016