What would you do to a son (16y/o) who doesn't know how to floss or brush his teeth?

My son does not like to brush his teeth. I always tell him to do it right, but he never does. I get so frustrated. It always leads to me to yelling and bickering at him! And I know it's not right. Should I leave him to do whatever so he'll learn his lesson one day when he gets dentures?! Any suggestions on what I should do? I'm in need of help!