Dental Crowns and MRI: Are They Safe? What Patients Need to Know

If you have a dental crown and have been advised to undergo an MRI, it is natural to wonder whether the two are compatible. Questions such as “Can an MRI pull out my crown?”, “Is a metal crown safe during an MRI?”, or even “Will I have to remove my crown before the scan?” are common.

The reassuring point is that having a dental crown does not automatically mean you cannot undergo an MRI. However, the material used in the crown, the condition of the restoration, and the area being scanned can all matter. The information provided to the MRI team is therefore important. This is also the central message of our patient-awareness series on dental crowns and MRI. 

What Is an MRI?

MRI stands for Magnetic Resonance Imaging. It is a medical imaging technique used to produce detailed images of structures inside the body.

Unlike an X-ray, an MRI works using a strong magnetic field and radiofrequency energy. Because of this magnetic environment, patients are routinely asked about implants, devices, previous surgeries, and other materials that may be present in or on their bodies before entering the MRI scanner.

Dental restorations are therefore worth mentioning during MRI screening—even when they have been in your mouth for many years.

Can an MRI Pull Out a Dental Crown?

One of the biggest concerns patients have is that the powerful magnet inside an MRI scanner might pull a dental crown off the tooth.

Usually, it does not.

A properly fitted crown is securely attached to the prepared tooth. The MRI considerations depend partly on what the restoration is made from and its condition. As highlighted in our patient-awareness post, the presence of a crown by itself does not automatically prevent an MRI. 

However, you should inform the MRI team about your dental work before the scan. If a crown or another dental restoration already feels loose, make sure you mention that as well. 

Not All Dental Crowns Are Made from the Same Material

This is one of the most important things to understand when discussing crowns and MRI.

Dental crowns can be manufactured from different materials. The post identifies four common categories:

Zirconia crowns are ceramic restorations made from zirconium dioxide and do not have the traditional metal framework found in some other crown types.

All-ceramic crowns are also metal-free and are produced from dental ceramic materials.

PFM (Porcelain-Fused-to-Metal) crowns combine an internal metal framework with an outer porcelain layer. The porcelain provides the tooth-coloured appearance, while the metal forms the underlying coping.

Metal crowns are manufactured from dental metal alloys.

Because crown construction varies, MRI considerations can also vary according to the material. Simply saying, “I have a crown,” does not necessarily provide the MRI team with all the potentially useful information. 

The Bigger Issue May Be MRI Image Quality

Patients often focus on whether their dental crown will physically react to an MRI. But another important consideration is image quality.

Some dental materials can produce what is known as an artifact on an MRI image. An artifact is an area of distortion or signal change that can make part of the resulting image less clear.

The social-media post illustrates this by comparing an MRI image without an artifact with one showing a dental artifact. 

This can be particularly relevant when the MRI involves areas close to the mouth, jaw, face, head, or neck. The clinical importance of any artifact depends on factors including the restoration, MRI technique, and the anatomical region doctors need to evaluate.

So the question is not simply:

“Is my crown safe?”

Another useful question is:

“Could my dental restoration affect the images my medical team needs?”

That is one reason why disclosing dental work before an MRI is important.

Three Common Myths About Dental Crowns and MRI

There is considerable confusion surrounding dental restorations and MRI examinations. The post addresses three particularly common myths. 

Myth 1: “If I have a crown, I cannot have an MRI.”

Fact: Not necessarily.

Having a dental crown does not automatically rule out an MRI. The type and material of the restoration need to be considered along with the MRI team's screening requirements.

Myth 2: “All metal crowns are the same.”

Fact: The material matters.

Dental restorations can contain different materials and alloys. They should not all be treated as identical simply because they contain metal.

Myth 3: “I don't need to tell the MRI team about dental work.”

Fact: Always tell them.

The MRI team should know about relevant dental restorations so they can evaluate the information as part of their normal safety and imaging protocol.

What Should You Do Before an MRI?

If you have a crown, bridge, implant, orthodontic appliance, or other dental restoration, there is no need to make your own decision about whether the MRI is safe.

Instead, provide the relevant information to the healthcare professionals performing the scan.

The post recommends four simple steps before an MRI: tell the MRI team about your dental work, share the material if you know it, mention any loose restorations, and follow the MRI team's instructions. 

These steps allow the professionals responsible for the MRI to assess your individual situation appropriately.

What If You Don't Know What Your Crown Is Made Of?

Many patients do not know whether an older crown is zirconia, ceramic, PFM, or another material. This is especially common when the crown was fitted many years ago or at another dental clinic.

Not knowing is not a reason to panic.

As the post advises, you can ask your dentist whether information about the restoration is available in your dental records. You should also tell the MRI team if you are uncertain about the material. 

Avoid guessing. Giving the medical team accurate information—or simply telling them that the material is unknown—is more useful than making an assumption. 

Should You Remove a Dental Crown Before an MRI?

A permanent crown is not something a patient should attempt to remove for an MRI.

If your medical team has any concern about a dental restoration, they can advise you about the appropriate next step. Similarly, if your crown feels loose, damaged, or unstable before the scan, speak with your dentist and tell the MRI staff.

The important principle is simple: do not make changes to a dental restoration solely because you are scheduled for an MRI unless the appropriate healthcare professional advises you to do so. 

Frequently Asked Questions About Dental Crowns and MRI 

1. Are zirconia crowns safe for MRI?

Zirconia crowns are made from nonferromagnetic ceramic material and are generally compatible with MRI examinations. They typically produce fewer metal-related imaging artifacts than crowns containing certain metallic alloys.

2. Can dental crowns affect brain MRI results?

Some metal-containing dental crowns can produce MRI artifacts, particularly during scans involving the head, jaw, face, or neck. These artifacts may reduce image clarity in nearby areas. Their significance depends on the crown material, imaging technique, and region being examined.

3. Are porcelain-fused-to-metal (PFM) crowns MRI-safe?

Many PFM crowns are compatible with MRI examinations. However, because they contain a metal framework, their MRI characteristics depend on the specific alloy used. Some PFM crowns may also produce imaging artifacts.

4. Are dental implants and bridges safe during MRI?

Many modern dental implants and bridges are compatible with MRI examinations. However, their safety considerations and potential imaging artifacts depend on the materials and components used. Always disclose dental implants and bridges during MRI screening.

Dental Crown + MRI Does Not Automatically Mean “No MRI”

The key message is straightforward:

Having a dental crown does not automatically mean that you cannot undergo an MRI.

Different crowns contain different materials, and some dental materials may affect MRI image quality. The safest approach is therefore not to assume that every crown behaves the same way—or to assume that having a crown means MRI is impossible.

Before your scan, disclose your dental work, mention the crown material if you know it, report any loose restorations, and follow the instructions provided by the MRI team.

Tell, don't guess. That small conversation before your scan can help the medical team make the appropriate decision for both safety and diagnostic image quality. 

Note: This article is intended for general patient education and does not replace individual advice from your dentist, radiologist, or MRI facility. MRI suitability should be assessed by the healthcare professionals responsible for your care. 

Looking for Dental Care in Indore?

If you have an existing dental crown, are unsure what material it is made from, or would like your restoration checked before an upcoming medical procedure, consulting a dentist can help clarify your dental history and the condition of the restoration.

If you're searching for dental care locally, read our complete guide to choosing the best dental clinic in Indore. You can also explore our guide on how to find the right dentist in Indore for your dental needs.