It’s important to keep in mind that every dental insurance plan differs, and you’ll need to directly contact your provider to learn whether a certain treatment is covered or not. However, most companies determine coverage based on a 100-80-50 structure. This means that they typically cover 100 percent of the cost of preventive care, like checkups and cleanings, 80 percent of basic treatments, like cavity fillings, and 50 percent of more serious procedures, like tooth extractions.