To the original poster:
I would agree with the others. Have some fun your last semester and take something that strikes your fancy or interests you. I would also strongly suggest that you try to take Biochem if you have not already, as well as Anatomy and Physiology. These classes, while not easy, will prep you for your first year at dental school. , and it will keep a lot of those facts fresh in your mind until you start. It's going to be hectic enough, with uprooting yourself and moving to a new place, so anything you can do to help smooth that transition you will be thankful for. I'm taking BioChem II in the spring, and am going to try to eat that huge elephant called human anatomy one piece at a time over the next eight months. I had it two years ago, and couldn't tell you the muscles I'm using to type this now! Sculpture wouldn't hurt too, and it's lots of fun.