--- title: "Orthodontics and Thyroid Conditions UK | 2026 Guide" url: https://virtualconsultant.online/guides/orthodontics-thyroid-conditions-uk description: "How hypothyroidism, hyperthyroidism, and thyroid medication affect orthodontic tooth movement, bone density, and treatment planning in the UK." updated: 2026-08-17T00:00:00Z publisher: Virtual Consultant Online --- Thyroid Hypothyroidism Hyperthyroidism Levothyroxine # Orthodontics and Thyroid Conditions UK Thyroid conditions are common in the UK — hypothyroidism affects approximately 2% of the adult population and hyperthyroidism around 0.5 to 1%. If you have a thyroid condition or take thyroid medication, this guide explains what the research says about how it may affect your orthodontic treatment. [Start Photo Assessment](https://virtualconsultant.online/evaluations/quote) [Compare Costs](https://virtualconsultant.online/costs) ## Thyroid function and bone metabolism The thyroid gland produces two main hormones: thyroxine (T4) and triiodothyronine (T3), which regulate metabolism throughout the body including bone metabolism. Thyroid hormones stimulate osteoblasts (bone-forming cells) and osteoclasts (bone-resorbing cells). In the context of orthodontics, bone remodelling — the controlled resorption on the pressure side and deposition on the tension side of a moving tooth — is the fundamental biological process that allows teeth to move through bone. Any condition that alters the balance of bone turnover can theoretically affect the rate, predictability, or safety of orthodontic tooth movement. The clinical significance of thyroid conditions for most orthodontic patients is modest, particularly when the condition is well controlled with medication. ## Hypothyroidism and orthodontic treatment Hypothyroidism — underactive thyroid — results in reduced circulating thyroid hormone. The consequences for bone metabolism include reduced bone turnover: both formation and resorption are slowed. In the context of orthodontic treatment, this theoretically means that tooth movement may be slower than average, as the remodelling response to orthodontic forces may be blunted. Clinically significant delays are reported anecdotally, but high-quality controlled studies are limited. Untreated or severely undertreated hypothyroidism is also associated with delayed wound healing, increased susceptibility to infection, and cardiovascular effects that would be relevant if extractions are needed. For patients whose hypothyroidism is well controlled on levothyroxine replacement therapy with a normal TSH, the impact on orthodontic tooth movement is generally minimal. ## Hyperthyroidism and orthodontic treatment Hyperthyroidism — overactive thyroid — produces elevated thyroid hormone levels and accelerates bone metabolism. Increased osteoclast activity leads to net bone resorption and reduced bone mineral density over time, which can increase the risk of root resorption during orthodontic treatment. Root resorption (shortening of tooth roots) is a recognised risk of orthodontic treatment, particularly with heavy continuous forces or prolonged treatment. While the evidence base is not definitive, some researchers suggest that untreated or poorly controlled hyperthyroidism may increase root resorption risk and reduce bone support. Cardiovascular effects of hyperthyroidism (palpitations, arrhythmias) are relevant if general anaesthesia is ever required for associated procedures. Well-controlled hyperthyroidism (euthyroid on medication) has a much lower risk profile. ## Levothyroxine and orthodontic treatment Levothyroxine (brand name Eltroxin or Levothyroxine tablets in the UK) is the standard replacement therapy for hypothyroidism. When the dose is optimised and TSH is within the normal reference range, patients are effectively euthyroid — their thyroid hormone levels are normalised. In this well-controlled state, levothyroxine itself does not directly interact with orthodontic treatment in a clinically meaningful way. There is no evidence that levothyroxine impairs or accelerates tooth movement beyond the effect of any residual under- or over-treatment of thyroid function. Patients should take levothyroxine at the same time each day, separate from calcium-containing supplements (which can reduce absorption), and attend their regular GP or endocrinology reviews to ensure TSH remains in range during orthodontic treatment. ## What to tell your orthodontist Always disclose any thyroid condition and any thyroid medication at your initial orthodontic consultation. Provide the name and dose of the medication (e.g., levothyroxine 100 mcg daily), the underlying diagnosis, and when it was diagnosed and how well controlled it is. If you have regular blood tests (TSH, T4), your most recent result date is useful. If your thyroid condition has been recently diagnosed or your dose has recently changed, let the orthodontist know. This information is included in your medical history form and informs risk assessment — particularly regarding rate of movement, root resorption risk, and healing — which affects how the orthodontist plans and monitors your treatment. ## Monitoring during treatment For patients with thyroid conditions, your orthodontist may recommend slightly more frequent monitoring radiographs (such as periapical X-rays at intervals) to check for root resorption, particularly if treatment is extended or heavy forces are being used. Continue attending your GP or endocrinology appointments during orthodontic treatment — do not let orthodontic appointments displace thyroid monitoring. If your thyroid status changes significantly during treatment (a new diagnosis, dose adjustment, or development of symptoms), inform your orthodontist promptly. Changes in thyroid status during treatment are relevant to ongoing risk assessment. ## Thyroid cancer treatment and orthodontics Patients who have been treated for thyroid cancer may have received radioactive iodine (I-131) ablation therapy or external beam radiotherapy to the neck region. External beam radiotherapy to the head and neck can reduce salivary gland function (causing xerostomia — dry mouth), alter bone density in the jaw, and affect wound healing and mucosal integrity. These effects are relevant to orthodontic treatment and particularly to any extractions. Radioactive iodine (I-131) is primarily concentrated in thyroid tissue and does not produce the same bone and soft tissue effects as external beam radiotherapy, so its orthodontic implications are more limited. Patients who have had head and neck radiotherapy should discuss this history with their orthodontist and may require closer liaison with their oncology team. ## No contraindication when well controlled The overarching clinical message is that thyroid conditions do not contraindicate orthodontic treatment. For patients whose thyroid function is well controlled on medication and who have a normal or near-normal TSH, orthodontic treatment can proceed using standard protocols. The orthodontist will factor in the condition when discussing treatment risks and may adjust monitoring frequency. Most patients with hypothyroidism or treated hyperthyroidism have perfectly successful orthodontic treatment outcomes comparable to patients without thyroid conditions. ## Useful related pages [Braces and Diabetes UK](https://virtualconsultant.online/guides/braces-and-diabetes-uk) [Orthodontics After Cancer Treatment](https://virtualconsultant.online/guides/orthodontics-after-cancer-treatment-uk) [Bisphosphonates and Orthodontics](https://virtualconsultant.online/guides/bisphosphonates-orthodontics-uk) [Root Resorption in Orthodontics](https://virtualconsultant.online/guides/root-resorption-orthodontics-uk) This guide is for general information only. It is not a diagnosis, treatment plan, or substitute for advice from a registered dentist or orthodontist. ### Compare next steps [Orthodontist Near Me](https://virtualconsultant.online/locations/orthodontic-treatment-near-me) [Clear Aligners Near Me](https://virtualconsultant.online/treatments/clear-aligners-near-me) [Invisalign Near Me](https://virtualconsultant.online/locations/invisalign-provider-near-me) [Browse Locations](https://virtualconsultant.online/locations) ### Ready for a clearer starting point? Upload guided photos and receive an indication of likely treatment options and pricing before booking appointments. [Get an Online Quote](https://virtualconsultant.online/evaluations/quote) ### Frequently Asked Questions Can I have braces if I have hypothyroidism? Yes. Hypothyroidism does not prevent orthodontic treatment. When your condition is well controlled on levothyroxine and your TSH is within the normal range, you can have braces or clear aligners with the same treatment goals as anyone else. Your orthodontist may monitor for slightly slower tooth movement in cases of undertreated hypothyroidism, but well-controlled patients typically experience normal treatment progress. Does levothyroxine affect tooth movement during braces? When levothyroxine is correctly dosed and your TSH is normal, the medication itself does not have a clinically meaningful impact on orthodontic tooth movement. It is the underlying thyroid status — not the medication — that matters. Effective replacement therapy normalises bone metabolism, which is the key biological process driving tooth movement through bone. Does hyperthyroidism increase root resorption risk during orthodontics? Hyperthyroidism is associated with increased bone turnover and reduced bone mineral density, which theoretically increases susceptibility to root resorption during orthodontic treatment. The clinical evidence is limited, but it is reasonable for the orthodontist to apply more conservative forces, monitor root length radiographically at intervals, and consider the thyroid status when planning treatment duration. Once hyperthyroidism is well controlled on medication, the risk profile is much closer to that of a euthyroid patient. Should I tell my orthodontist about my thyroid condition? Yes, always. Thyroid conditions affect bone metabolism, healing, and — in the case of hyperthyroidism — cardiovascular function. This information is directly relevant to orthodontic treatment planning and risk assessment. Disclose the diagnosis, medication name and dose, how long you have had the condition, and how well controlled it currently is. Update your orthodontist if your dose changes or if new symptoms develop during treatment. Do I need any special tests before starting orthodontic treatment with a thyroid condition? Not usually, if your condition is already diagnosed and monitored by your GP or endocrinologist. A recent TSH result is helpful context for your orthodontist, but a specific pre-orthodontic thyroid test is not routinely required. Your orthodontist will take a full medical history and will advise if any additional information from your GP would be useful before starting treatment. Can thyroid disease affect healing after extractions for braces? Well-controlled thyroid disease has little practical effect on healing, and most patients need no special arrangements. Poorly controlled hypothyroidism is the situation that warrants care, because it can be associated with slower wound healing and, in severe untreated cases, with a general reduction in metabolic response to stress. Untreated hyperthyroidism carries its own concerns around cardiovascular response, which is relevant to local anaesthetics containing adrenaline. In practice the useful step is confirming the condition is stable and treatment is being taken as prescribed, rather than delaying orthodontics for the diagnosis itself. Explore your options Quick links Not sure where to start? Use these quick links to explore orthodontic treatments, typical costs, and helpful guides that explain what different options involve. Whether you're researching braces or clear aligners, comparing pricing, or just getting a feel for what comes next, you can browse at your own pace and come back when you're ready to request a quote. 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Upload guided photos and get a tailored recommendation for your teeth and bite. [Start Photo Assessment](https://virtualconsultant.online/evaluations/quote) [Find an Orthodontist](https://virtualconsultant.online/locations) Citation details Title Orthodontics and Thyroid Conditions UK | 2026 Guide Publisher Virtual Consultant Online Published 2026-05-28 Updated 2026-08-17 URL [https://staging.virtualconsultant.online/guides/orthodontics-thyroid-conditions-uk](https://staging.virtualconsultant.online/guides/orthodontics-thyroid-conditions-uk)