The short answer
The timeline, honestly
How long does Invisalign take? Most Invisalign treatment runs 12 to 18 months — mild cases can finish closer to six, complex ones can stretch past two years. Your exact timeline comes from the plan, not from averages: a digital scan maps every stage, and Dr. Perkins projects the path before you start.
Here's what the calendar actually contains: a consultation and scan, the staged trays, the treatment months, and the retention phase that holds the result. Each part has its own length — and each one is supervised. The American Dental Association's MouthHealthy orthodontics guide describes removable aligners as orthodontic treatment under a dentist's or orthodontist's supervision — which is exactly how the timeline gets set and kept honest.
- The scan sets the plan — and the projected timeline — before the first tray
- Progress visits keep the calendar honest, adjusting when teeth don't track
- The finish includes retainers and follow-ups, so the result holds