Q. I had a procelain crown done, using the new all in one dental machine that takes a picture of your tooth before the prep, during the prep after the prep, then the dentist draws the crown and the machine makes the crown in about and hour in the office. Since then the tooth has now developed decay. So now I am told that I now have to have this old crown removed the decay removed, the tooth rebuilt up and a new crown put on this tooth. So how could this have happened? When I asked this question I sure did get a song and dance from my dentist, I said you know I have crowns in my mouth I have had for over 20 years with no decay. Did you not get all of the decay the first time ? Where you in a hurry? Did you not get a good seal when you seated the crown? I expect you to make this right. Well, you know those things happen was the answer I got, HMMM, that’s not acceptable from my dentist what do you think I should do? What would you Do? I don’t eat, junk food, I get regular check ups, I floss I even take naps in the dental chair when the dentist is working on my teeth.