Dental Treatment During Pregnancy: What Is Safe and When

Pregnancy changes the mouth more than most people expect, and the instinct to postpone all dental care until after delivery can leave small problems to become large ones. Most routine dentistry is safe throughout.

Why gums get worse

Rising progesterone and oestrogen exaggerate the gum's inflammatory response to plaque. The same amount of plaque that caused no trouble before now produces swelling, redness and bleeding — pregnancy gingivitis, which affects a large proportion of pregnancies, typically from the second month and peaking around the eighth.

Some women develop a pregnancy granuloma (also called a pyogenic granuloma): a red lump on the gum that bleeds easily. It looks alarming and is benign. It usually shrinks after delivery, and is only removed if it interferes with eating.

This matters beyond comfort. Moderate evidence links untreated periodontal disease in pregnancy with preterm birth and low birth weight. Keeping gums healthy is part of antenatal care, not cosmetic.

Morning sickness and enamel

Repeated vomiting bathes the teeth in stomach acid, which erodes enamel quickly — especially on the inner surfaces of the upper front teeth. The important instruction is counter-intuitive: do not brush immediately after being sick. Enamel is softened and brushing scrubs it away. Instead rinse with water, or with a teaspoon of bicarbonate of soda in a cup of water to neutralise the acid, and wait an hour before brushing.

What is safe, and when

• Check-ups and cleaning: safe throughout, and recommended. Tell us you are pregnant at the appointment.
• Fillings and extractions: safe, best scheduled in the second trimester.
• Local anaesthetic: lignocaine is well established and safe in the doses used in dentistry. Treating pain is safer than enduring it.
• X-rays: safe when needed, with shielding; elective ones are usually deferred.
• Root canal treatment: safe, and far better than leaving an infection.
• Antibiotics: penicillins and cephalosporins are generally used. Tetracyclines are avoided — they stain the developing teeth.
• Best deferred: whitening, elective cosmetic work, and non-urgent implant surgery.

Trimester by trimester

First: organ development, plus nausea makes appointments unpleasant. Keep to check-ups and urgent care. Second: the comfortable window — schedule anything needed here. Third: safe, but lying flat becomes uncomfortable and can press on major blood vessels, so appointments are kept short and the chair is tilted, often with a cushion under the right hip.

Two persistent myths

“The baby takes calcium from my teeth” — it does not. Foetal calcium comes from the mother's diet and, if necessary, her skeleton. Teeth do not lose mineral to a pregnancy. Decay during pregnancy comes from changed eating patterns, snacking and acid, not from the baby. And “lose a tooth for every child” is folklore from an era of poor antenatal care.

Frequently asked questions

Is dental treatment safe in the first trimester?

Routine check-ups and cleaning are safe throughout. Elective treatment is usually scheduled for the second trimester, mainly for comfort. Genuine dental emergencies should be treated at any stage.

Can I have a tooth extracted while pregnant?

Yes, if it is necessary. An untreated dental infection poses a greater risk to a pregnancy than the extraction. Second trimester is preferred where there is a choice.

Is local anaesthetic safe during pregnancy?

Yes. The lignocaine used in dentistry is well established in pregnancy at the doses involved. Being in pain, and the stress that goes with it, is the greater concern.

Why are my gums bleeding now when they never did before?

Pregnancy hormones exaggerate the gum's response to the same plaque you always had. It is very common. Careful cleaning and a professional scaling usually bring it under control.

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