Overview: Dental insurance has its own distinct benefit structure and cost-sharing mechanics, different from medical insurance in important ways.

Dental insurance is less about protection against catastrophic loss and more about a structured cost-sharing arrangement for predictable and semi-predictable care. The standard framework is the 100-80-50 model, which describes the percentage the insurer pays at each tier of care.

Preventive and diagnostic care — routine cleanings (typically twice a year), oral exams, bitewing X-rays, fluoride treatments, and sealants — is covered at 100%. Insurers pay the full contracted rate because preventing problems is far cheaper than treating them. Most plans do not require the deductible to be met before covering preventive services.

Basic procedures — fillings, simple extractions, emergency pain relief, and often periodontal scaling and root planing — are covered at approximately 70–80%. The patient pays the remaining 20–30% as coinsurance, after satisfying the deductible. Whether root canals are "basic" or "major" varies by insurer.

Major procedures — crowns, bridges, dentures, surgical extractions, and complex restorations — are covered at approximately 50%. The patient pays the other 50%. Some plans include implants in this tier; many exclude them entirely.

Orthodontics, if covered at all, is typically treated as a separate fourth tier, reimbursed at 50% up to a lifetime maximum (commonly $1,000–$1,500) and often restricted to dependent children under 19.

The cost-sharing mechanisms in dental plans include:

Premium — the monthly payment to maintain coverage
Deductible — typically $50–$100 per person per year, waived for preventive care, applied to basic and major services
Coinsurance — the percentage the patient pays after the deductible (20% for basic, 50% for major in a typical 100-80-50 plan)
Annual maximum — the most the insurer will pay per person per plan year, commonly $1,000–$2,000. Once exceeded, the patient pays 100% of remaining costs for the year. This is the opposite of a medical out-of-pocket maximum — it caps the insurer's exposure, not the patient's.
Waiting periods — typically none for preventive, 3–6 months for basic, and 6–12 months for major procedures
Network restrictions — in-network dentists accept negotiated rates; out-of-network dentists can balance-bill the patient for amounts above the insurer's allowed fee