Gosh! This is a tough one! I would probably not write about any failures unless it was obvious in your record that there's something wrong. As everyone mentioned, have an extremely convincing story on how you learned from this experience and has made you the person that you are and how you've "matured" from this experience. Writing a PS can be such a stressful situation. It literally took me months to think, procrastinate, wonder, and little by little I began constructing my PS, by every day or every other day adding or editing it and I had a couple of good friends who were a lot of help and who knew me enough to help me write about myself. Because I'm sure you know how hard it's to write about one self. Solicit friends or family and try not to stress over it. Take it one day at a time and little by little you'll see improvements until one day you'll come up with a "great work of art". Good luck!ecdoesit said:I agree with gatorfan99. You really need to have a convincing argument. Remember to prove your argument so that adcom believes it too. And I really hope your failure doesn't include any academic misconducts. Most committee wont like that. Also, I would keep it short unless you can tie it to why you want to be a dentist.