Well, here goes my rant...there is a big difference between being introverted and being shy. Of course, people that are shy are also introverted. But, being introverted doesn't mean that someone is shy and socially inept. IMO, the difference between an introvert and an extrovert is that the extrovert gets energized from interacting with people. To them it's like playing. To the introvert it's more like work and it can be tiring. It's not a handicap, and it doesn't mean the introvert isn't capable of interacting as much as the extrovert, they just prefer not to.
Unfortunately, being introverted is looked at negatively. We're shy, unmotivated, etc. When I was an engineer my first performance review said I did an excellent job with a task that required me to communicate accurately and frequently with every engineering discipline working on a multi-million dollar project. The only negative comment on my review was I needed to be more "outgoing" (in other words, BS more at meetings...).
So, when it comes to your interviews, realize that your personality just might count against you and you need to be as outgoing as possible. Try to be the worlds biggest extrovert at your interviews. Don't rely on past work experience that proves you can be an outgoing and effective communicator, blah, blah, blah. I got rejected from one school because they thought I was too introverted for their program.
As far as dentistry itself goes, I would say that as long as you can communicate what needs to be said and be personable enough to gain the trust of your patients you'll be fine. Realize that in health care, BSing with patients is required. I worked on an ambulance and doubt any of my patients thought that I was an introvert.
I think dentistry is a great field for introverts because you're not constantly talking with patients. You have periods of working with your hands, etc. where you can "re-energize". Although, I think if you want a successful practice you need to realize you're always communicating with your patients, and staff non-verbally and you need the discipline to have a professional and confident demeanor. So, if you are shy you really need to be honest with yourself and work on that. I think the best thing about dentistry for introverts is you'll be your own boss. When you're doing work you know is excellent and that's reflected by patients that are happy with you and your work, you'll never have to read a performance review telling you that you needed to be more outgoing with the UPS guy. 😀