A pregnant patient presents with a toothache requiring root canal treatment. When is it appropriate to perform the procedure?

Correct answer: A. Whenever clinically necessary, particularly during the second trimester

• A. CORRECT. Dental treatment, including root canal therapy, can and should be performed whenever clinically necessary during pregnancy. The SAFEST elective period is the second trimester (weeks 14–20), when organogenesis is complete and the fetus is not yet large enough to cause aortocaval compression. However, if the patient is in acute pain, dental emergencies should be treated in ANY trimester — deferring necessary care risks systemic infection and stress, which are more dangerous to the fetus than properly administered dental treatment.
• B. The third trimester presents challenges including aortocaval compression (semi-reclined position required) and patient discomfort, but emergencies are still treated.
• C. The first trimester (organogenesis period) is the most critical developmental stage; elective treatment is deferred but urgent/emergency care should still be provided.
• D. Deferring all necessary treatment until after delivery can result in spreading infection, bacteremia, systemic illness, and significant maternal suffering — all of which pose risks to the pregnancy.