I think there's no dentist accepting bitcoin as payment, You have a choice to choose you can use bitcoin to convert it into fiat or withdraw to your bank account. If you have bank account you instantly withdrawn your bitcoins into fiat to use it or to pay if for your dental.
If you are already travel there i think you should find a bank or exchange store that accept bitcoin before you go in dentist. I didn't hear that there's a dentist accepting bitcoin but you can mention dental tourism Albania it to him and maybe he can deal with your bitcoins..