The patient is not pleased with the buccal plate atrophy 1 year 9 months postop (1 year 2 months post cementation, Fig.12, when the crown is repaired due to loose proximal contacts).  Probably the 5 mm implant is small for the site or bone graft was insufficient post extraction.

Moderate Diameter Implant Last Next Xin Wei, DDS, PhD, MS 1st edition 05/12/2017, last revision 08/25/2019