Good morning. Teeth can be aligned at any age if your gums are healthy. There are different options like braces, aligners, hidden braces (on the inner side of teeth )etc. Choice of treatment depends on how aesthetically you want your treatment and how much crowding or malalignment you have. Aligners is also a good option if you want to hide your treatment but case selection is required. Not all cases can be treated with aligners. Pls visit our clinic for better understanding Dr reeva arora