The United States is the largest and most affluent country in the world.

And yet, dental plans are so sparsely covered that some people are getting little or no dental care, or may not even have dental insurance at all.

A growing number of American adults, particularly young adults, are struggling to afford the costs of dental care and are forced to buy more expensive and less comprehensive dental plans.

According to the U.S. Department of Health and Human Services, in 2016, more than a quarter million Americans had dental coverage that didn’t cover services such as preventive care, dental cleaning and prescription drugs, and dental appliances.

A quarter of these Americans were between the ages of 25 and 34, according to the report.

Some of the plans that do cover services were found to be “insufficiently comprehensive,” or were designed to cover only a fraction of what the dental health care professionals can offer.

Dental plans, like the ones offered by health insurance companies, are the only form of insurance available for most Americans.

The reason that dental plans do not cover all services, and often do not provide coverage for most of the services that they cover, is that many plans do cover some or all of dental services.

For example, dental care in a private dental plan is included in the deductible, but the plans don’t provide dental care or prescription drugs.

Some plans also include some dental services as preventive health care, but they don’t include preventive dental care.

And some plans provide preventive dental treatment that may be unnecessary.

“Dental care is so underutilized that many people don’t have dental coverage,” said Dr. David E. Hahn, professor of medicine and director of the department of preventive medicine at New York University.

“The insurance companies that do provide dental coverage are paying the costs.”

The dental plans in which the average premium is $1,000 or less do not include dental care altogether, but instead cover preventive dental and dental care that may need to be covered, he said.

The lack of dental coverage also is making it harder for people to obtain preventive care.

“In addition to not getting the preventive care that they need, some people may not be able to get preventive dental or preventive dental medication,” said Erez Elhanan, a health insurance expert at the nonprofit advocacy group Center for American Progress.

Some people who have insurance are unable to obtain it for a variety of reasons, according the report, which cited several examples.

Insurance companies typically cover preventive care only if they have a deductible of $500 or more and are covered by the Federal Employee Health Benefits Program, according a Department of Labor fact sheet.

But in some cases, those who have no dental coverage may not have enough money to cover preventive health benefits.

In some cases people who are unable or unwilling to pay the deductible may be left with a choice of either buying a new insurance policy or going without coverage altogether, according Hahn.

And some people who get dental coverage have difficulty finding qualified dental specialists.

Some may have trouble finding dental services in a particular location because they may have to travel to that location to find a dentist.

“Some people will find a doctor who is not qualified, but that doctor is also a dentist who is willing to go in and fix your problem,” said Elhanant.

While dental care is not covered by most health insurance plans, it is still one of the largest expenses in a person’s yearly budget.

People may be tempted to get a preventive dental plan to pay for dental care when they have dental problems, but it is important to ask whether that’s a wise choice, Elhanants said.

And it may be worth asking whether it’s the right choice for you, if your dentist is a professional who specializes in preventive dentistry, for example, Elhaanants said, or if you are not willing to pay a deductible and can’t afford to get any treatment at all from a specialist.

According the report , “A large majority of people in the United States don’t know their dentist’s name or can’t get a full list of specialists.”

And if you don’t get the care you need from your dentist, the dental care may not make sense, said Elhaans.

The U.N. Educational, Scientific and Cultural Organization (UNESCO) recommends that all people have access to dental care “free of charge.”

It also recommends that individuals be told about the dental plans and procedures covered in them.

The United States spends about $1 trillion annually on health care costs, according for example to the Centers for Disease Control and Prevention, and the average annual dental visit in the U, according in a report by the U for the Poor and for All: A Report on Dental Care.

In addition, a majority of Americans say they do not want to have to pay premiums on dental care alone.

For many Americans, the cost of dental insurance, which includes coverage for preventive dental services,