How can i make sure that my dental crowns properly fit so i don't have to go back to this dentist?

this will be the 4th time i have to go in for crowns. he never checks to see if they fit properly, but he just cements them in and removes the excess cement. after going back in for odor problems, the dental hygenist took x rays and saw that there was an open margin even though he had looked at the x ray and failed to diagnose this. i went to another dentist and she told me to get him to temporarily cemented it in. will this work if something if she finds something wrong with the crowns? is still liable to fix the problem even if i go to someone else to make sure that they are done right? i don't really want to pay someone else to double check his work, so is there something that i can do to make sure things are right. after this is all over i plan on never going back to him again. also i ran my fingernail with a little pressure along the crown with the open margin and i felt it pop loose a little, is that normal?

How can i make sure that my dental crowns properly fit so i don't have to go back to this dentist?
If the crown is lose, it will fall off. Check to see if your own tooth is shaky?
Reply:I would find another dentist. It seems like he is doing a half *** job. A corwn should not feel loose. It should look and feel like a normal tooth. I can't even tell that I have a crown in my mouth. I am able to eat whatever I want, whenever I want. Now, I understand that you do not want to pay another person to check this idiots work (I did not have insurance when I got my crown. So I know how expensive it can be) but you should really go to another dentest asap.