The alloy in alloy porcelain teeth can be used for MRI if it is a precious metal alloy, if it is a non-precious metal alloy, it cannot be used for MRI and will affect the results of the MRI. Precious metal alloys commonly used in alloy porcelain dental crowns include gold-platinum-palladium alloys and gold-palladium alloys. Commonly used non-precious metal alloys include nickel-chromium alloy, cobalt-chromium alloy, titanium alloy and so on. MRI uses a magnetic field to produce test results. The presence of non-precious metals in alloy porcelain crowns can disrupt the magnetic field, resulting in distorted final imaging and affecting the diagnosis and treatment of other conditions. If you need to undergo an MRI, it is recommended that you go to the dentist first, remove the alloy porcelain crowns, and then undergo an MRI, or use all-ceramic or pure titanium crowns to repair the tooth defects at the time of the initial restoration.