Can a patients with dental crown do a MRI test of cervical spine?

Those crowns , seem to be old, and there is receding gums, but also you will need to change those crowns ,there is no other way to correct this.when you have crowns that do not fit, the most important  thing its to change them as soon as possible,because this line you see might be decay...

It should be safe, but it is always a risk. I suggest to my patients that they bite off slightly to one side on natural teeth or cut the harder fruit, such as apples, into slices before eating. Softer fruits should be fine.

I would agree that  the crown does not look very good and it may also be quite thin in spots as a lot of grinding was done.It should be redone, but the dentist should reevaluate the space available to do a crown. The tooth in front of the crown shows a lot of erosion on the biting surface....