I have not had a tooth filled for over 13 years until yesterday when I had two teeth filled. In the past the dentist always filled up the inside cavity of the tooth until the top of the cavity was almost flush with the surrounding tooth. Yesterday the dentist filled the two teeth but I noticed he left a a sizable valley on top of the filling. Is this something new? Does it have something to do with putting pressure on the sounding tooth? Was the dentist correct in doing this? Will food get stuck in the valley of the tooth? Thank you for your help.