Dental insurance typically covers a range of preventive, basic, and major dental services. Preventive care such as regular cleanings, exams, and X-rays are often fully covered or require minimal copayments. Basic services like fillings and extractions may be partially covered, while major procedures such as root canals and crowns usually have higher copayments or deductibles. Some plans also offer coverage for orthodontic treatment like braces or retainers, though this varies.