Hello, If you are concerned with long time that is required for the treatment completion then depending on the severity of tooth malalignement smile correction can be done using veneers or crowns. If the severity is more then you can opt for invisiliners which are practically invisible to the other person infront of you. These are removable however there is a time span for which you have to wear these. A more economical option is to use ceramic brackets which are partially visible. Visit a dentist and ask for the various options available depending on your comfort ypu can opt for the best one

Hi    Either you go for fixed appliance therapy FAT, or forv new generation aligners 

Hi.... Removable appliances can not be given at your age. You should go for fixed braces treatment.

For the best results u have to for braces as they can allign ur teeth accurately and i will acheive best result. There are other removable appliances also which can be used for the correction of malocclusion

Removable solutions might not work at your age. You can either opt for braces or cosmetic treatment like crowns or veneers. Clinical examination and occlusal analysis is required before advising you on what is the best solution