Dental Implants and MRI Scans: What You Need to Know

If you have dental implants — or are considering getting them — you may have wondered whether they are compatible with MRI scans. This is one of the most frequently asked questions by patients, and it is a perfectly reasonable concern.

In this article, we explain the science behind MRI compatibility, what happens during a scan, and whether your dental implants will cause any problems.

Dental Implants and MRI Scans: What You Need to Know

Titanium dental implants are generally considered MRI safe. Titanium is a non-ferromagnetic material, meaning it does not react significantly to the magnetic fields used in MRI scanners. In the vast majority of cases, patients with titanium dental implants can undergo MRI scanning without complications.

Why Titanium Implants Are MRI Compatible

MRI scanners use powerful magnetic fields and radio waves to create detailed images of the body's internal structures. Ferromagnetic metals — such as iron, nickel, and cobalt — can be attracted to the magnet or heat up during scanning, creating safety risks.

Titanium, the standard material for dental implants, is paramagnetic. This means it has an extremely weak interaction with magnetic fields and is generally considered safe during an MRI. The implant is not expected to move, heat up, or cause harm, though patients should always inform their radiologist.

Can Dental Implants Cause Artefacts on MRI Images?

While titanium implants are safe, they can sometimes cause minor image distortion (known as artefacts) on MRI scans in the immediate vicinity of the implant. This is typically only relevant for scans of the head, jaw, or neck area.

• Head and brain MRIs — minimal interference; radiologists are trained to account for dental hardware
• Jaw and TMJ scans — may show some distortion near the implant site
• Body MRIs (spine, knee, abdomen) — dental implants have no effect whatsoever
• Cardiac MRI — titanium implants are not a contraindication

What About Other Dental Restorations?

Not all dental materials are the same. Here is how different components interact with MRI:

• Titanium implants — safe, non-ferromagnetic, minimal artefacts
• Zirconia implants — completely MRI compatible as zirconia is a ceramic with no metallic properties
• Porcelain and zirconia crowns — no interaction with MRI
• Metal-based crowns or bridges — some older restorations containing nickel-chromium alloys may cause more noticeable artefacts
• Implant abutments — titanium abutments are safe; some specialty alloys should be discussed with your radiologist

What Should You Tell Your Doctor Before an MRI?

Always inform the MRI technician that you have dental implants. Whether you have replaced a missing back tooth or had front teeth restored, this information helps the radiologist interpret the images correctly and adjust scanning parameters if necessary.

Frequently Asked Questions

Do dental implants set off airport metal detectors?

Titanium dental implants are very small and typically do not trigger airport security scanners. For more details, read our guide on travelling with dental implants.

Can I have a CT scan with dental implants?

Yes. CT scans use X-rays, not magnetic fields, so dental implants of any material are completely compatible.

Will my dental implant get hot during an MRI?

Titanium is non-ferromagnetic and does not absorb significant radiofrequency energy. Based on current evidence, no clinically significant heating effect has been reported during MRI scans with titanium dental implants.

Are zirconia implants better for MRI compatibility?

Zirconia implants produce zero artefacts on MRI, making them slightly advantageous for patients who require frequent head or jaw MRIs. However, titanium implants remain safe and are not a medical reason to choose zirconia. Learn more in our guide to metal-free dental implants.