hi, I had braces for almost 4 years, before they placed may braces, I had a permanent filling on my R molar. my braces was removed a year and a half, and wearing retainers. Last 2 days ago, may permanent filing on the molar was accidentally removed and cracked. I had a deep molar filling yesterday, the dentist said that it was 3/4 of my tooth affected. there is still pain same pain before filling, is it normal?