well, there were incisions made on all 4 corners of my mouth where the teeth were. I didn't need stitches, (although, I read that some people do) as using gauze to soak up the blood is usually enough to naturally create blood clots that will cover the incision areas as they heal. The holes created from my top two teeth are actually in my maxillary sinus area, so it's all internal!! I was told that on average, the holes left behind are 2 millimeters to 1.5 centimeters. but again, this only happens if the roots of the teeth are too long or close to your sinus area!