If abutment screw is loose in dental implant, will it show up in the X-ray?

HI:Most likely it will not show up on the X-ray.  However, if the crown is loose but the implant is ok on the implant most likely it is the abutment screw.Best,Dr. Maddahi

Yes, if a screw is loose it would be noticeable in an x-ray. I suggest calling your dentist and having them take a look to avoid any issues that may arise from a loose screw.

If this is the case then something should show up.  Unfortunately, there is always the possibility of everything looking normal on the x-ray.  If the screw is easily accessible, then it can be accessed and checked for tightening as needed without too much fuss.

Tough question...It will depend on how loose it is.  The best way to check is to have your dentist open the access to the screw and check that way.