
Treatment time ranges widely from less than 6 months to more than six years,
Dr. McAnnally says. Interceptive or early treatment procedures may take as few as six months. Complex skeletal malocclusions or "bad bites" associated with skeletal imbalances and poor facial growth patterns may benefit from multiphase treatments beginning in the mixed dentition at an early age and continuing to maturity. A good guiding principal is "Do what needs to be done, when it needs to be done without regard to time." Many of the best treatment outcomes begin in the mixed dentition and extend to maturity.
Treatment extended over long periods of time need not be continuous. Rest periods need to be interspersed during which minimal or no appliances are being worn. Periodic observations during rest periods commonly occur near the end of the mixed dentition from ages10 to 11 1/2 while the last of the primary teeth are lost and exchanged for permanent teeth.
Treatment time also varies with the severity of the patient's problems, the biological response to treatment, and the patient's compliance during treatment. Factors affecting treatment time include the patient's skeletal, dental, and emotional maturation and the development of the dental arches, jaws and face. Patients grow at different rates and will respond variously to orthodontic treatment, so the time to case completion may differ from original estimates. The patient's diligent use of any prescribed rubber bands or appliances, maintenance of good oral hygiene, and periodic appointments at the doctor's recommended intervals are important factors in achieving the most effective and efficient treatment outcome.
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