Dental Implants and MRI Scans: What You Need to Know

Introduction

If you have dental implants or are considering getting them, you may be wondering whether they are compatible with MRI (Magnetic Resonance Imaging) scans. This is a common concern, especially for patients who require regular medical imaging.

In this article, we explain the science behind MRI compatibility and what you need to know about dental implants and medical imaging.

Modern dental implants are made from titanium, which is a non-ferromagnetic metal. This means titanium does not react to magnetic fields in the way that iron or steel would. As a result, titanium dental implants are considered MRI-safe and will not move, heat up, or cause harm during an MRI scan.

Why Titanium Is MRI-Compatible

MRI machines use powerful magnets to create images of the body's internal structures. Ferromagnetic metals (like iron and cobalt) can be pulled by these magnets, making them dangerous during scans. Titanium, however, is paramagnetic — it has an extremely weak response to magnetic fields and poses no safety risk.

This is one of the reasons titanium has been the material of choice in medical and dental implants for decades, with applications in orthopaedic joint replacements, spinal hardware, and dental implant systems.

Can Dental Implants Cause MRI Artefacts?

While titanium implants are safe, they can cause minor imaging artefacts — distortions in the MRI image near the metal. These artefacts appear as darkened or blurred areas around the implant site.

In most cases, these artefacts do not affect the clinical usefulness of the MRI, especially if the area of interest is elsewhere in the body. However, if imaging of the jaw, mouth, or face is needed, your radiologist may adjust the scanning protocol to minimise distortion.

What About Other Implant Components?

• Implant post (fixture) — titanium, MRI-safe
• Abutment — typically titanium or zirconia, MRI-safe
• Crown — porcelain, zirconia, or metal-ceramic — porcelain and zirconia cause no issues; some metal-based crowns may produce minor artefacts
• Implant-supported dentures — may contain metal frameworks; removable dentures should be taken out before scanning

What to Tell Your Radiologist

Before any MRI scan, you should inform the radiographer that you have dental implants. While titanium implants are safe, it is standard practice to disclose all metallic implants. Be prepared to share:

• The type of implant system (your dental practice can provide this)
• The material (titanium)
• The location and number of implants
• Whether you have any removable prosthetics (these should be removed)

Are Other Dental Materials MRI-Safe?

Most modern dental materials are MRI-compatible, but some older restorations may contain metals that can cause artefacts:

• Amalgam fillings — may cause minor artefacts but are safe
• Gold crowns — non-ferromagnetic and safe, very minor artefacts
• Stainless steel crowns — may cause artefacts; inform your radiologist
• Orthodontic retainers with metal — typically safe but should be disclosed

Frequently Asked Questions

Can I have an MRI scan with dental implants?

Yes. Titanium dental implants are MRI-safe. They will not move, overheat, or cause injury during the scan. Always inform your radiologist about any implants before the procedure.

Will dental implants affect the quality of brain or head MRI scans?

In rare cases, dental implants may produce minor artefacts on head or brain MRI images near the jaw. Your radiologist can adjust scanning parameters to minimise any interference.

Do I need to remove any dental work before an MRI?

Fixed implants, crowns, and bridges do not need to be removed. Removable dentures, retainers, or any prosthetics with metal clasps should be taken out before the scan.

Are zirconia implants better for MRI compatibility?

Zirconia implants produce no artefacts at all since they are entirely metal-free. However, both titanium and zirconia implants are safe for MRI scanning.

If you have concerns about dental implants and medical imaging compatibility, book a free consultation with our team to discuss your treatment plan.