How does dental insurance work?

Most dental plans follow a 100/80/50 structure: preventive care (cleanings, exams) covered at 100%, basic work (fillings) around 80%, and major work (crowns, bridges) around 50%, subject to an annual maximum benefit (often $1,000 to $2,000) and sometimes waiting periods. DHMO plans are cheaper but network-restricted; PPO plans cost more but offer more flexibility.