If your employer doesn't offer a comprehensive dental plan, a discount dental plan may be your most affordable option. Traditional supplemental dental insurance (for example, through eHealthInsurance) tends to be expensive. Discount dental plans are much cheaper: usually under $100 a year.

For discount dental plans in California, check out Dental Plans. They offer details on a number of different dental plans, including the First Dental Health and the Liberty CA90 in California, and National Discount Services in Los Angeles. You can get a quick, free quote by entering your zip code or going to the state index and choosing California.