My lower molar was extracted. After a week I noticed the gum of inner lateral side of the extracted site has white sharp piece coming out from the gum. I'm not sure if it is part of my tooth left after extraction or the main bone that they damage during extraction. I went to the dentist again. The piece was removed and i was told that they smoothen the part of the bone also. My gum was infected and had anti-biotic. But it still bother me because the gum on the side left OPEN (hole) after they removed the piece and it's about 5mm in diameter and the bone is visible. I dont have gum disease. DOES MY PROBLEM NEED SURGERY OR SHOULD I JUST LEAVE IT? WILL IT HEAL AND THE GUM WILL GROW AND COVER IT NATURALLY? Please reply, thank you.