The upper right 2nd molar has severe bone loss (Fig.3, PA X-ray).  This image must have been taken obliquely (distomesially, in comparison with Fig.5).  The buccal roots (MB, DB) appear to be separated from the palatal one (P).  It suggests a large septum, a site for an immediate implant.

Palatal Socket

Xin Wei, DDS, PhD, MS 1st edition 12/25/2014, last revision 12/25/2014