A dental plan in the United States is a type of health insurance specifically designed to cover a variety of dental services and treatments. These plans are intended to help people gain access to necessary dental care while reducing the costs of oral health-related procedures and services. Dental plans generally cover a range of services, which may include:

1. Preventive Care: Regular dental evaluation, cleanings and x-rays, panoramics.
2. Basic Treatments: Fillings, dental extractions and gum treatments.
3. Restorative Procedures: Crowns, bridges and dental prostheses.
4. Orthodontic Treatments: Braces and aligners to correct dental alignment.
5. Cosmetic Treatments: Teeth whitening, dental veneers, etc.

Dental plans often have networks of dental providers with whom they have pre-set rate agreements, which can help reduce costs for policyholders. Some plans may require co-pays or deductibles, and the amount of coverage and specific details may vary by plan and insurance company.

Dental plans in the United States can be standalone or can be offered as part of a package along with a health insurance plan. Individuals can purchase dental plans separately or through their employers if they offer dental benefits as part of their compensation package.