Are you talking about scaling, as in a teeth cleaning?
If your dentist says to go off warfarin for 5 days beforehand, I'd get another dentist.
My dentist never says to go off warfarin. My cardiologist & PCP have told me to stay on warfarin, except for exceptional circumstances. Even my gastroenterologist says he does colonoscopies on mechanical valvers while anticoagulated.
I had my teeth cleaned Monday. Tuesday morning when I brushed, I spit out a clot from where the hygientist had apparently nicked my gum. There was no more bleeding.
Unless you nick a major artery or something like that, you can always control bleeding. It's called applying pressure.