Many people only go to the dentist when something is wrong. That is truly a shame, because they are missing out on so many preventive services that can save discomfort — and expense — down the road. Regular dental visits are essential to make sure oral health problems — from tooth decay to oral cancer — are detected and treated in a timely manner. Some individuals may need to see the dentist more often than others to stay on top of problems like plaque buildup and gum disease, but everyone should go at least once per year.