From what I know usually good looking people are favoured for most job interviews if for example there is a decision to be made and the skill level of the candidates are similar or near equal. I'm not sure about dental school though I have seen the class composite of the University of Toronto dental school and there aren't anyone you would call ugly and there are a lot of attractive people. They might not be what you call "Hot" but they are mostly attractive. Definitely better than the average looking person. So if you have good stats and fortunate to have good looks, it is a sad truth but given that you have an advantage, now that all depends on your personality and how you use your advantages. However, on the flip side of the coin, even if you aren't that good looking, if you dress professionally, kept yourself well groomed, have good stats, and present yourself well, you too will have a good shot. SOmetimes it isn't about how you look naturally but how you dress and present yourself.