Of all the things that I consider important, dental care if right up there with the top few things. Eating right would be number one though eating right is a part of dental care. The right foods = healthy teeth etc. etc.
Brushing several times a day, flossing, and getting regular checkups, all are just plain good sense if you want your teeth to last throughout your lifetime.
If you don't have a dentist now, it's time to find one. You can search online for a dentist in your area. As an example, search for Frisco Dentist on Google and up will come a list of dentists in your area.
I'm an advocate of research and feel so blessed to have access to so much info at our fingertips. So, find a dentist in your area and look after those beautiful teeth.