Will a temporal ct scan show tmj?

Yes: Ct of temporal area of skull shows mastoids, ear contents, and tempomandibular joint. Gross bony abnormalities, subluxation, and arthritic changes (joint narrowing)in the joint can be detected. Sometimes images are done in open and closed mouth positions.

It should: If not done yet, you can ask the ct technologist to be sure the correct study is about to be performed, but it should show the TMJ adequately.

Possible: It's in the area, so it is possible to see TMJ, but probably not the right parameters, so unlikely radiologist will make a diagnosis without a formal CT/MRI of TMJ