How Family Dental HMO Insurance Plans Save You Money? HMO Family dental plans is a good way to save money on your family dental care needs. HMO dental plans usually have no waiting periods and moreover, in many cases their activation is within the next month of buying the plan. Most dental HMO insurance plans do not have yearly limits or paperwork that must be filed. Your savings range on dental care needs will start from 10% up to a maximum of 60% many times including, braces for both children and adults.