Do you need cufflinks and studs for your shirt for a black tie event?
Invited to a black tie wedding. The shirt has normal buttons on it along with slots for cufflinks and studs. Can I just use the normal buttons or do I need to use cufflinks and studs.

you may use the normal buttons to any event.
If you have favorite or expensive cuff links or studs you may use them instead
Just use the normal buttons
Cufflinks look silly
Cufflinks, of course. They make you look sophisticated, as if you are going to a Black Tie event, which you are. DUH! No, of course not, do NOT use buttons, unless you are going to work.
Yes; especially with a bow tie, where the front buttons would be visible.
Generally speaking, if the event is formal enough to be called "Black Tie" then studs and links should be worn. They do not have to be expensive–in fact the plainer the classier.