Remember, you're a clinician first, scientist second. I applaud your interest in research. Oftentimes, there is space in the secondary asking if you're interested in research for these "research-heavy" schools. For example, UCSF straight up asks you if you're interested in their PhD program in their secondaries. With regards to your personal statement, a focus on patient care is critical. However, one of UCSF's past deans, Dr. Charles Bertolami, expounds on the need for a "taste for complexity", "a mind for science", or "a consumer of science" among dental students in one of his articles. It would be a good idea to provide evidence of similar values or perspectives on the role of curiosity in your undergraduate career.