That explains a lot. I had one of these improperly done on a molar about 10 years ago. After the anesthetic wore off from the first visit, the pain slowly grew over the next few days until it was of brilliant, blinding, bang-head-against-hard-object make it STOP!! intensity.

After they took off the temp filling, the smell was nauseating. Apparently it wasn't cleaned very well.

Never went to that guy again.