Vertical fist bare knuckel is safer?

Is it safer for ur knuckels if u strike with vertical fist then the horizontal?
I think the ver fist puts less strain on ur wrist but because u tend hit the ver. with the 3 bottom knuckels i would think that it would also break faster

Newbietown or trollshido?

Its safer for your opponents face at least.

http://en.wikipedia.org/wiki/Boxer's_fracture

and the search function on here.