Braces are ideal for complex bite alignment. Severe crowding and underbites.
Non-removable means the teeth are being moved 24 hours of the day.
Treatment time is typically 18 months to three years. But depends on each case.
While
Aligners are ideal for mild tooth crowding. Minor tooth movement.
Removable aligners must be worn for 20 to 22 hours daily for maximum efficacy.
Treatment time is typically 12 to 18 months. But depends on compliance and each case.
Source: ddclinicbeirut - Dynamic Dental Clinic Beirut