Often, there is no waiting period in a group plan, like one offered by an employer. Of course, if you were eligible for a company-based plan, you probably wouldn't be shopping around on your own. However, the same privilege might be had in a group plan offered through an organization such as AARP. With their plans, there's no waiting period for preventative services, at least.
The cost of not taking care of your oral health could be more. Those without individual dental coverage are less likely to get routine dental care, meaning they seek out a dentist only when they have a problem. By then, more extensive and more expensive measures may be necessary, and major problems linked to poor oral health (like heart disease and diabetes) are more likely to appear.2 Doing nothing now means you might pay more later.