It is possible to have a back MRI with dentures. Dentures that have metal inside and cannot be removed can have an effect on the MRI of the head. The main symptom is the appearance of artifacts on the image, resulting in an unclear diagnosis of the head. Patients who are concerned about this before having dentures can consider all-ceramic crowns, which are unaffected by the MRI because they do not contain metal, so they can be performed normally. If a dental implant is present in the patient’s mouth, a porcelain crown can also be MRI’d as long as the upper portion is not metallic. Only porcelain crowns that contain metal can affect the results of the exam, but usually only the head.