Since the mesiodistal and buccolingual widths of the edentulous area are moderate (Fig.2), a 5x8.5 mm implant seems to be big; a 4.5 mm one is better. The buccal and lingual bone resorption appears to be severe at #6 of the same patient postop.
Xin Wei, DDS, PhD, MS 1st edition 11/21/2019, last revision 12/03/2019