Your ps should be about:
1. Who you are (briefly including essential aspect-not an autobiography)
2. How you became interested in dentistry
3. What you have done to achieve your goal academically and otherwise (shadowing- what procedures you witnessed and what impact, if any, those procedures had on you)
4. Any skills you may have to show you have some semblance of manual dexterity skills
5. Future plans you have in dentistry