I am still considering PhD later but without actually treating patients and teaching in academic settings, I have no idea which is a better fit for me and which I would truly enjoy. I wanted that experience before committing my life into academia. Also, the money you get as a dual student is a lot and will leave you with little debt. But, clinicians get more money after dental school in 3 years than you would for your entire dual program. So if you decide dual, do it because of the program and what it offers rather than money.