You can have your teeth straightened at the age of 34. If your teeth are uneven, you can go to a dental hospital for correction and your teeth will be back to their straight state. If the teeth are not straight, you need to go to a dental hospital to determine the degree of the deformity, and then choose an orthodontic treatment plan. If the dental deformity is not too serious, it can be corrected by wearing braces. If the dental deformity is more serious, you may need to Treat with orthodontic surgery. Keep your mouth clean and dry, and eat soft and easy-to-digest foods.