Heavy bruxism is characterized by the crack at #3 (symptomatic, requiring emergency extraction) and loss of the palatal cusp at #5 (Fig.1).   In fact, the implant at #2 was placed 2 years earlier due to crown fracture post RCT.

Repair Sinus Membrane Perforation

Xin Wei, DDS, PhD, MS 1st edition 12/29/2016, last revision 01/19/2018