Should a Dentist Pay for a Failed Root Canal?
Restorative Dentistry8 min read • By Dr. Kevin Baharvand, DMD, MS • Updated August 2026The short answerSometimes, and it depends on why it failed. Root canals succeed at a high rate but not one hundred percent of the time, and a failure is not automatically anyone fault. Many offices will apply the original fee toward retreatment or an extraction if a tooth fails within a reasonable window, and many will...
How Long Does Numbness Last After a Filling?
Restorative Dentistry7 min read • By Dr. Kevin Baharvand, DMD, MS • Updated August 2026The short answerFor an upper tooth, usually one to three hours. For a lower back tooth, where the injection blocks the whole nerve rather than just the area around the tooth, three to five hours is normal and it can run longer. Your lip and tongue stay numb well after the tooth itself has woken up....
What Is a Dental Crown, and When Do You Actually Need One?
Restorative Dentistry8 min read • By Dr. Kevin Baharvand, DMD, MS • Updated August 2026The short answerA crown is a custom cap that covers a tooth completely, replacing its outer shape and taking the chewing load off what is left underneath. You need one when there is not enough solid tooth left to hold a filling, when a tooth is cracked, or after a root canal. The choice of material...