When the crown becomes loose again 3 years later, the hex fractures inside the implant.  After its removal (Fig.9), a narrower abutment is placed for a new crown (Fig.10: 5x4(4) vs. 6.5x4(4) mm).

Larger Abutment  Last Next

Xin Wei, DDS, PhD, MS 1st edition 11/04/2016, last revision 11/04/2020