Hi practo user,
Usually the treatment takes 1- 1.5 years and not more than that. But retainers will be placed , which might be temporary or permanent depending on the condition during braces removal.
Next Steps
For more details you can contact your orthodontist .
Health Tips
Please keep up your appointment timings regularly and avoided breaking the braces, these both will extend your treatment time. Also maintain good oral hygiene.
Hope this helps you.