The waiting period for coverage under Humana One dental plans can vary depending on the specific plan chosen. Generally, most plans may have a waiting period that can range from zero to twelve months for certain services, particularly for major services such as crowns or dentures. Preventive services, however, are often covered immediately without a waiting period. It is important for individuals to carefully review the terms and conditions of their selected plan to understand the specific waiting periods that may apply. For the most accurate and detailed information regarding waiting periods and coverage options, it is advisable to visit the official Humana website or refer to the plan documentation, which typically outlines these aspects clearly.