I had teeth 23,24,25 & 26 crowned a week ago, 3 days later tooth 26 was incredibly painfull, May have knocked it on upper teeth or bit into something. Next day noticed it wad very loose( thought the crown was loose, went back to dds, he took a look adjusted the bite and said the tooth is loose, he said he hoped the nerve would survive and said it may tighten up again,currently tooth is no longer sore, but still loose (maybe not as much)