Why do my teeth hurt when i chew after getting fillings? they didn't hurt before and its been a month

Common question: Without knowing the depth of the restorations, it's hard to tell exactly why they are sensitive. But in general, the teeth were slightly traumatized by the excavation of the decay, and the irritated nerve in the tooth can remain sensitive until it heals. The bite may also be off a bit, so it's best that your restorative dentist takes a look. Call for an appointment.

See Dentist Again: Post-operative tooth sensitivity is common after any invasive dental procedure. After all, teeth are living tissues, and they respond just like other body parts when someone manipulates or cuts into them. However, sensitivity or soreness which lasts more than a few days should be re-checked. It's usually pretty easy to fix, so go back to your dentist for a quick check and an adjustment.

Many reasons.: Here are some reasons: 1) the filling may be 'high' and the dentist needs to adjust it. 2) the filling was 'deep' and the nerve of the tooth is still traumatized 3) the filling was very large, and the remaining part of you tooth (that holds the filling) may be weak or has fractures. Have your dentist check this out.