For good oral health it is necessary to brush teeth twice daily, floss regularly and see your dentist every 6 months.
If you are doing a good job in maintaining your oral health, you could still get tartar built up on your teeth which would need a professional clean. Tartar if allowed to be deposited on your teeth, can harm your bone in the long run, make your teeth loose and you could eventually lose them much earlier than otherwise. Gum issues and early decays can easily go unnoticed until you start getting pain which then calls for a expensive treatment. Hence regular dental checkup are a vital part of caring for your smile and saving you money from spending huge amounts on big comprehensive treatments.