When the patient returns for impression, a 4.5x5.5(3) mm abutment is fully seated (Fig.9 <).  The distal height increases by 4 mm because of immediate implant (support).  A drawback associated with a smaller abutment is a loose crown.

Graft Retention    Last    Next   Fig.4,8,9

Xin Wei, DDS, PhD, MS 1st edition 02/12/2020, last revision 05/05/2020