Some cases can be completed in less than a year by your OKC orthodontists, more difficult cases take longer. The average case will take from 2-3 years. Our appointment system and the Doctors’ mechanics are designed to reduce the number of times you will need to be seen and the overall length of treatment. Treatment time varies with the severity of the case, patient cooperation, and growth and development. The Doctors will attempt to estimate treatment time at the initial appointment.