Orthodontic Treatment During Pregnancy: What You Need to Know

Pregnancy brings a host of changes to your body — and your mouth is no exception. If you are already wearing braces or clear aligners when you fall pregnant, or you are considering starting orthodontic treatment during pregnancy, you are not alone in wondering what is safe, what is sensible, and what can wait. This guide covers everything UK patients need to know about orthodontic treatment during pregnancy, from X-ray safety to gum changes and what your orthodontist will want to discuss with you.

Is Orthodontic Treatment Safe During Pregnancy?

The short answer is yes — with appropriate precautions. Fixed braces and clear aligners do not contain substances harmful to a developing baby. The mechanical process of tooth movement itself poses no risk to your pregnancy. The British Orthodontic Society (BOS) advises that patients who are already mid-treatment should generally continue, as stopping abruptly can lead to relapse and undo months of progress.

Where pregnancy changes the picture is in your body's response to treatment. Elevated levels of oestrogen and progesterone increase blood flow to the gums, making them more sensitive, more prone to inflammation, and more reactive to the bacterial plaque that builds up around brackets and wires. This condition — pregnancy gingivitis — affects up to 70% of pregnant women to some degree, and orthodontic appliances can make it harder to maintain the oral hygiene needed to keep it under control.

Pregnancy Gingivitis and What It Means for Your Treatment

Pregnancy gingivitis typically appears in the first trimester and peaks around the second. Signs include redness, swelling, tenderness, and bleeding when you brush or floss. It is not caused by braces — but fixed appliances create more surfaces for plaque to accumulate, which can intensify the inflammatory response.

Left unmanaged, pregnancy gingivitis can progress to more serious gum disease (periodontitis), which research has linked to preterm birth and low birth weight — though the evidence is still evolving. The priority is excellent oral hygiene throughout your treatment. Your orthodontist may recommend more frequent hygienist appointments during your pregnancy, and your midwife or GP should be aware you are wearing orthodontic appliances.

X-Rays and Orthodontics During Pregnancy

This is one of the most common concerns pregnant orthodontic patients raise. The good news is that most routine orthodontic adjustment appointments do not require any X-rays at all. X-rays are typically taken at the initial records stage — before treatment begins — and may be repeated at certain diagnostic milestones or at debond.

If you are already mid-treatment, you are unlikely to need any new X-rays during your pregnancy unless there is a clinical reason your orthodontist cannot address otherwise. In that situation, modern dental X-rays use very low levels of radiation, and the abdomen and pelvis are shielded with a lead apron. The Public Health England position and NHS guidance both acknowledge that diagnostic dental X-rays in pregnancy carry an extremely small theoretical risk that must be weighed against the clinical benefit.

In practice, the overwhelming majority of orthodontists will defer any non-essential X-rays until after delivery. If you are starting treatment from scratch and records are needed, discuss the timing with your orthodontist — many will wait until the second trimester at the earliest, or until after birth.

Starting New Treatment During Pregnancy: Should You?

Starting orthodontic treatment from scratch during pregnancy is a conversation worth having with your orthodontist rather than a blanket yes or no. Several factors influence the decision:

Pain Relief and Medications During Orthodontic Treatment

After an adjustment appointment, some discomfort is normal for 24–72 hours. During pregnancy, the pain relief options available to you are more limited than usual. Ibuprofen and aspirin are generally contraindicated during pregnancy, particularly in the third trimester. Paracetamol is widely considered safe when taken at the recommended dose for short periods, but always confirm with your GP or midwife before taking any medication.

Practical non-pharmaceutical strategies that can help include eating soft foods, using orthodontic wax to cushion any irritating brackets or wires, rinsing with warm salt water to soothe inflamed gum tissue, and applying a cold flannel to the jaw externally. Some patients find that the discomfort after adjustments is slightly more pronounced during pregnancy, possibly due to increased tissue sensitivity.

Oral Hygiene Priorities During Pregnancy

Maintaining excellent oral hygiene becomes even more important when you are pregnant and wearing orthodontic appliances. Hormonal changes make your gums more reactive, so plaque that might have caused mild irritation before pregnancy can trigger a much stronger inflammatory response.

Key hygiene habits to prioritise:

Morning Sickness and Clear Aligners

If you are wearing clear aligners, morning sickness presents a specific challenge. Aligners should be worn for a minimum of 20–22 hours per day to keep treatment on track, but frequent nausea and vomiting can make this genuinely difficult in the first trimester. Vomiting with aligners in is unpleasant and potentially unhygienic.

Practical approaches include removing aligners during the worst period of morning sickness and cleaning them thoroughly (and your mouth) before replacing them. If you are consistently missing more than two to three hours of wear per day, speak to your orthodontist — they may recommend extending your wear time on each aligner set, pausing to a particular set until morning sickness improves, or temporarily switching to a maintenance phase.

Stomach acid from vomiting can also damage aligners over time. Rinse your mouth and aligners carefully and store aligners in their case when they are not in use.

Tooth Sensitivity During Pregnancy

Many pregnant women report increased tooth sensitivity, even without orthodontic treatment. The combination of hormonal changes, potential enamel erosion from morning sickness, increased gum recession in some patients, and the normal sensitivity that comes with orthodontic tooth movement can make some periods of treatment feel more uncomfortable than they might otherwise.

Using a sensitivity toothpaste (compatible with fluoride), avoiding very cold or very hot foods and drinks shortly after adjustments, and keeping your orthodontist informed of any significant discomfort will help manage this. Your orthodontist may opt for lighter forces during pregnancy to reduce discomfort and minimise the strain on already-sensitive gum tissue.

What About Retainers After Pregnancy?

If you complete your treatment while pregnant or shortly after giving birth, the retention phase is just as important as always. Hormonal changes during and after pregnancy can temporarily affect the stability of teeth — the relaxin hormone that loosens ligaments throughout the body can subtly affect the periodontal ligaments that anchor your teeth.

This makes consistent retainer wear in the period after birth especially important. Whether you have a fixed bonded retainer or a removable plate, follow your orthodontist's instructions carefully. If you are breastfeeding and concerned about any materials in your retainer, discuss this with your orthodontist — the materials used in orthodontic appliances are inert and are not considered a risk.

Asking the Right Questions at Your Appointment

If you are pregnant and currently in orthodontic treatment, or planning to start, these are the questions worth raising with your orthodontist:

You can explore your orthodontic options from home using the Virtual Consultant Online assessment tool, or read more about treatment types available and typical treatment costs in the UK.

NHS vs Private Orthodontics During Pregnancy

Pregnant women in England are entitled to free NHS dental treatment during pregnancy and for 12 months after the birth. This includes routine dental checkups and hygiene appointments. NHS orthodontic treatment, however, is still subject to eligibility criteria based on clinical need (IOTN score) and is primarily available to under-18s. You can check your IOTN eligibility online or read more about NHS orthodontic eligibility.

For private orthodontic treatment, costs during pregnancy are the same as at any other time. However, some orthodontists may wish to build in additional check-ups or hygiene appointments, which could slightly increase the overall cost of your care. Flexible payment plans are available at many practices — it is worth discussing your personal circumstances openly with your orthodontist so the right treatment plan can be built around your pregnancy journey.