The new implant at #30 is placed as lingual (Fig.7 green) as possible, since the buccal bone is low. 

Place the implant at #31 below the crest ~ 1.5 mm to gain the bone width (Fig.8).

Implant at Failed Site Last

Xin Wei, DDS, PhD, MS 1st edition 11/06/2016, last revision 07/04/2018