This patient presented with a broken lower implant. I originally restored this implant crown a few years ago, and I was quite surprised and curious as to why it broke. This is very rare, and I used all the best, highest quality, Swiss made, Straumann Implant parts. The implant porcelain crown and titanium abutment broke apart leaving the screw still in the implant. She clenches and grinds her teeth, but still, this should not have occurred. I redid the implant crown and did not charge the patient. These are the clinical pictures: