Will screws from Zygoma reduction causes issues at checkpoints?

These types of screws do not usually present problems with security checks in airports, so you shouldn't have anything to worry about.

Thank you for your question, this procedure is done with titanium plates and screws which should not affect radiographic imaging machines at check points. I would definitely verify with your surgeon to make sure the material being used will not hamper your traveling. I hope this was helpful. Best Dr. Emer. 

Thank you for posting your question to Realself.
For the procedure you are discussing, the type of metal used in the implants is titanium. As such, the implants will not cause issue at security checkpoints. The radiographic scanners and metal detectors will not likely pick up the implants and you will be able to make it through security, pending you don't have any other metal in or on your body. 
Hope this helps!
Dr. Dan Landmann, MD, MSEE