George Eliot was a poet who believed that wearing a gorgeous smile would help you make new friends but that having a scowl would only give you unattractive wrinkles. However, when you avoid smiling because your teeth are crowded and overlapping, it is time to visit an orthodontist for an evaluation. The best time for someone to have her teeth straightened is during childhood. But teenagers and adults can also have their teeth fixed. Having your teeth straightened can change your entire facial appearance, making it easier to smile at other people on a daily basis.