A 5.2x4.5(4) mm cemented abutment seems to be incompletely seated (Fig.7). It remains the same after 5.5 and 6.0 mm profile drills (Fig.8,9). A 4.5x4.5(4) mm abutment appears to be completely seated (Fig.10).
Xin Wei, DDS, PhD, MS 1st edition 01/14/2020, last revision 08/15/2021