I had a root canal on a molar years ago and have had no issues since. Today, while chewing trident (the only gum we have due to my son's braces), I felt something hard. It appears to be a small piece of tooth. My molar feels different, but does not hurt. I believe this is one of the little spikes bits on top. Do I need to call my dentist? I was there for routine cleaning and xrays last week and everything was fine.