Can you safely have a root canal done in the beginning of the third trimester of pregnancy?

Yes: If dental work is necessary, do it. Local anesthetic is safe. X-rays to the mouth will not cause harm to a baby, and your belly will be shielded, anyway. Sometimes a dentist or endodontist will ask for a note from your obstetrician.

Normally yes: The middle trimester is usually the best time for endodontic treatment. However, the beginning of the third trimester should not pose any problem. A better questiom would be, "what is the risk of waiting until after the birth?" if the answer involves continuing pain, infection or further loss of tooth structure then wisdom points toward completing the procedure.