Dentists and orthodontists offering Invisalign are ranked according to how many patients they have treated with the method. Preferred. A preferred provider treats at least 10 cases per year. Premier. A premier provider has treated over 50 cases and at least 25 cases every 6 months. Premier Elite. A premier elite provider has treated over 300 cases and at least 50 every 6 months. Super Elite. A super elite provider has treated 800 cases and at least 100 every 6 months. With experience comes success. The more cases a dentist treats, the higher the chances of successful treatments and satisfied customers. Ask your dentist where they rank as an Invisalign provider and make sure they have the experience necessary to correct your teeth in the average timeframe.