Since 1954, the firm has been providing insurance and offers both PPO and HMO plans. Delta Dental should be one among the first firms you investigate for dental coverage, with consistently good ratings for financial stability and more than 150,000 participating providers around the country. But before you enroll or continue your coverage, make sure you are getting the best deal possible. You may want to consider alternative options besides Delta Dental; for example, if you don't need extensive coverage or can't afford the rates, see what other carriers have to offer. And if you go with another company's plan, make sure you understand the differences between the various policies they sell. Also, know that while most companies cover new problems as they arise, some may not. For example, if you have had a root canal done recently, many plans will still cover the treatment of any further issues related to the tooth that was treated during the procedure. However, others may not. Check with your carrier to make sure you are covered for all possible situations that could arise with your teeth. Finally, be sure to read your policy carefully and ask questions if something is unclear. It's important that you understand exactly what your coverage entails before you start receiving benefits.