I think the PS can set you apart if written well and demonstrates qualities that a school is looking for. When you realize that dental school is a self selected group of high achievers (no differentiation at this point between Hi IQ brainiacs and hard working overacheivers) the PS becomes a way of setting yourself apart, not because of the obstacles you have overcome, the artistic hands you think you have, or the accolades you have received academically, but who you are as a person and what you will bring to the profession. What will you bring to the table that will make you a superior healthcare provider (don't think necessarily dentist....we all provide care and treatment....think about it in those terms). What about being a healthcare provider will give you satisfaction? Restoring a smile is just one of the things we do.