---
title: "Osteoporosis and Orthodontics UK | Bone Density Effects"
url: https://virtualconsultant.online/guides/osteoporosis-orthodontics-uk
description: "How osteoporosis and low bone density affect orthodontic tooth movement, the overlap with bisphosphonate use, calcium and vitamin D during treatment."
updated: 2026-08-17T00:00:00Z
publisher: Virtual Consultant Online
---

Osteoporosis

Adult Orthodontics

Medical Conditions

# Osteoporosis and Orthodontic Treatment

Approximately three million people in the UK are affected by osteoporosis, the majority of them post-menopausal women. If you have osteoporosis — or low bone density short of the diagnostic threshold, known as osteopenia — and are considering orthodontic treatment, understanding how your bone health interacts with tooth movement is essential for setting realistic expectations and planning safe treatment.

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## How osteoporosis affects bone structure

Osteoporosis is diagnosed when bone mineral density, measured by DEXA scan, produces a T-score of minus 2.5 or below. Osteopenia describes T-scores between minus 1.0 and minus 2.5. In both conditions, reduced trabecular bone density means the alveolar bone supporting the teeth is less dense than in a healthy adult. Orthodontic tooth movement relies on the cycle of bone resorption on the pressure side of a tooth and bone deposition on the tension side. In osteoporotic bone, this cycle is altered: the resorption phase tends to be more active relative to formation, which has implications for treatment planning.

## Does bone density affect how teeth move?

The evidence suggests that teeth may move more readily in osteoporotic bone than in normal-density bone — the reduced bone resistance means less force is needed to initiate tooth movement. However, this comes with an important trade-off: the increased resorptive activity associated with osteoporosis raises the risk of external apical root resorption (EARR), where the root tip shortens during treatment. Root resorption is a recognised risk of all orthodontic treatment, but the risk may be elevated in patients with osteoporosis, particularly with prolonged treatment or heavy forces. Orthodontists managing patients with osteoporosis therefore typically use lighter forces, shorter treatment arcs, and monitor root lengths on radiographs more frequently than standard protocols.

## The bisphosphonate overlap

Many patients with osteoporosis are prescribed bisphosphonates — medicines such as alendronate, risedronate, or zoledronic acid — to reduce bone resorption and fracture risk. Bisphosphonates accumulate in bone and inhibit osteoclast activity, which has a different effect on tooth movement: rather than accelerating movement, they tend to slow it and can make tooth movement less predictable. The duration of bisphosphonate use and the cumulative dose are important factors. Patients who have been taking oral bisphosphonates for many years carry a degree of residual drug in their bone long after stopping. Any patient on bisphosphonates should disclose this to their orthodontist, as it affects treatment planning, force levels, and the decision about whether tooth extractions as part of treatment carry a small risk of medication-related osteonecrosis of the jaw (MRONJ). The risk is low with oral bisphosphonates at osteoporosis doses, but the orthodontist should liaise with the prescribing GP or rheumatologist.

## DEXA scan and its relevance

Patients who have had a DEXA scan should share their T-score results with their orthodontist. This helps the orthodontist understand the baseline bone quality. If you have not had a DEXA scan but have risk factors for osteoporosis — post-menopausal woman, family history, steroid use, low body weight — it is worth discussing referral for a scan with your GP before starting orthodontic treatment. Having a baseline measurement also allows comparison if concerns about bone changes arise during treatment.

## Calcium and vitamin D during orthodontic treatment

Adequate calcium and vitamin D are essential for bone metabolism and tooth movement. Bone remodelling during orthodontic treatment requires both minerals in sufficient supply. Patients with osteoporosis are frequently prescribed calcium and vitamin D supplementation as part of their bone health management, and continuing these during orthodontic treatment is important. Vitamin D deficiency is common in the UK due to limited sunlight exposure. Patients who are not already supplementing should discuss this with their GP. There is evidence that vitamin D deficiency is associated with slower, less predictable tooth movement and potentially increased risk of root resorption.

## Post-menopausal bone loss and timing of treatment

Bone loss accelerates significantly in the first five to ten years after menopause due to oestrogen withdrawal. Women considering orthodontic treatment during this period should be aware that their alveolar bone may be at its most vulnerable. This does not make orthodontic treatment impossible, but it does mean the orthodontist should be aware of bone health status and adapt the approach accordingly. Women who are several years post-menopause and whose bone density has stabilised — or who are on effective bone-protective therapy — are generally considered to carry lower additional risk.

## Liaison with GP and rheumatologist

For patients with significant osteoporosis, a conversation between the orthodontist and the treating GP or rheumatologist is good clinical practice before starting treatment. The GP can confirm current medication, advise on planned medication changes, and provide DEXA scan results. If a patient is due to start bisphosphonate therapy, it is worth considering whether orthodontic treatment should begin before commencing bisphosphonates, as this avoids the additional complexity of managing tooth movement while bisphosphonates accumulate in bone.

## Useful related pages

[Bisphosphonates and Orthodontics](https://virtualconsultant.online/guides/bisphosphonates-orthodontics-uk)

[Vitamin D and Orthodontics](https://virtualconsultant.online/guides/vitamin-d-deficiency-orthodontics-uk)

[Orthodontics Over 50s UK](https://virtualconsultant.online/guides/orthodontics-over-50s-uk)

[Hormones and Orthodontic Treatment](https://virtualconsultant.online/guides/hormones-orthodontic-treatment-uk)

[Orthodontics in Your 40s](https://virtualconsultant.online/guides/orthodontics-in-your-40s-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.

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### Frequently Asked Questions

Can I have orthodontic treatment if I have osteoporosis?

Yes. Osteoporosis is not a contraindication to orthodontic treatment. It does mean the orthodontist should be aware of your bone density, any medications you are taking, and should use appropriately light forces with more frequent radiographic monitoring. Most patients with well-managed osteoporosis can complete orthodontic treatment successfully.

Does osteoporosis make teeth move faster or slower?

Evidence suggests tooth movement may be somewhat faster in lower-density bone because resorption activity is relatively high. However, this is accompanied by increased root resorption risk. Patients on bisphosphonates — commonly prescribed for osteoporosis — experience the opposite: slower, less predictable movement due to inhibited osteoclast activity.

Do bisphosphonates affect orthodontic treatment?

Yes. Bisphosphonates inhibit the osteoclast activity that drives bone resorption on the pressure side of moving teeth, which can slow tooth movement and make treatment less predictable. The longer the duration of bisphosphonate use and the higher the cumulative dose, the more significant the effect. Your orthodontist and GP should communicate to ensure safe treatment planning.

Is root resorption more likely if I have osteoporosis?

There is some evidence of a higher risk of external apical root resorption in patients with altered bone metabolism. To mitigate this, orthodontists use lighter forces, take periodic radiographs to monitor root lengths, and may modify treatment to reduce the duration of active tooth movement.

Should I take calcium and vitamin D during braces?

Yes, if you are not already doing so. Both are essential for bone remodelling during tooth movement. Patients with osteoporosis are typically already supplementing under GP guidance. If you are not supplementing, discuss this with your GP before starting treatment, particularly given the high prevalence of vitamin D insufficiency in the UK.

Do I need a DEXA scan before getting braces?

You do not need a DEXA scan specifically for orthodontic purposes, but if you have risk factors for osteoporosis and have not been assessed, it is worth discussing with your GP. Sharing your DEXA results with your orthodontist helps them understand your bone health and tailor treatment accordingly.

Can orthodontic treatment worsen osteoporosis?

There is no evidence that orthodontic tooth movement worsens systemic osteoporosis. The bone remodelling involved is localised to the alveolar bone around the teeth. However, tooth movement places demands on bone quality, which is why adequate bone density and good nutritional support during treatment are important.

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Citation details

Title Osteoporosis and Orthodontics UK | Bone Density Effects

Publisher Virtual Consultant Online

Published 2024-06-01

Updated 2026-08-17

URL [https://staging.virtualconsultant.online/guides/osteoporosis-orthodontics-uk](https://staging.virtualconsultant.online/guides/osteoporosis-orthodontics-uk)