Can porcelain-fused-to-metal crowns undergo MRI?

Oct 16, 2025 Source: Cainiu Health

Dr. Liu Chao

Introduction

In general, whether porcelain-fused-to-metal crowns are suitable for MRI depends on the material used. All-ceramic crowns are usually compatible with MRI, whereas crowns with a metal base are generally not recommended. To extend the lifespan of dental crowns, proper daily care is essential—avoid chewing hard foods with the crowned teeth to prevent cracking or chipping, and maintain good oral hygiene by brushing teeth twice daily and using dental floss to clean between teeth.

Generally, whether porcelain-fused-to-metal crowns can be used during MRI scans depends on the material of the crown. All-ceramic crowns are usually compatible with MRI, whereas metal-based crowns are generally not recommended. The detailed analysis is as follows:

If the dental crown is made entirely of ceramic material without any metal components, it will not interfere with the magnetic field of the MRI, affect imaging results, or cause adverse effects on oral tissues. Therefore, such crowns do not need to be removed before undergoing an MRI.

However, if the crown contains a metal base—such as nickel-chromium or cobalt-chromium alloys—the metal may disrupt the MRI's magnetic field, causing image artifacts that could impair the doctor’s accurate diagnosis. Additionally, the metal may generate heat within the magnetic field, potentially irritating oral tissues. For these reasons, MRI is generally not advised for patients with metal-based crowns.

To extend the lifespan of dental crowns, proper daily care is essential: avoid chewing hard foods with the crowned tooth to prevent cracking; maintain regular brushing and flossing to clean between teeth; schedule routine dental checkups; and promptly address any gum issues. If an MRI is required, it is advisable to consult with your doctor in advance about the crown's material composition.

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Which is better between porcelain-fused-to-metal crowns and dental implants, and what are the differences?

Under normal circumstances, both porcelain-fused-to-metal (PFM) crowns and dental implants are common methods for dental restoration. Both are effective but are suitable for different situations. The differences between the two lie in restoration principles, effects on adjacent teeth, comfort and functional recovery, lifespan, cost, and other aspects. When choosing between PFM crowns and dental implants, a comprehensive consideration of individual oral conditions, financial capacity, and other factors is recommended.

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Can porcelain-fused-to-metal crowns cause gum recession?

If there are problems with the fabrication of a porcelain-fused-to-metal crown—such as excessively long or uneven crown margins that irritate the gums, or abnormal crown shape that leads to food impaction—poor long-term oral hygiene may trigger gingivitis. Persistent inflammation can damage gum tissue and eventually lead to gingival recession. Additionally, some patients may be allergic to the metal substructure of the crown, which could also cause gingival inflammation and recession.

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How long after tooth extraction can you get a porcelain crown?

After tooth extraction, the alveolar bone enters a healing phase. The first 3 months represent a period of relatively rapid alveolar bone resorption, during which bone volume and morphology change significantly. If porcelain-fused-to-metal crown restoration is performed too early at this stage, it may lead to poor fit between the prosthesis and the alveolar bone, potentially causing gaps, occlusal discomfort, and other problems later on. After 3 months, the rate of alveolar bone resorption slows down and the bone morphology gradually stabilizes.

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What should I do if my porcelain crown falls off?

In general, if a porcelain crown becomes dislodged, the main management methods include seeking timely medical evaluation, cleaning the area, temporary fixation, remaking and re-cementing the crown, and proper follow-up care. Additionally, patients should follow their dentist's advice throughout the process, attend scheduled follow-up appointments, and seek prompt medical attention if they experience any abnormalities such as tooth pain, swelling, or loosening of the crown.