Yes, adults can change the shape of their teeth without using braces through several dental procedures. One option is dental bonding, where a dentist applies a tooth-colored resin to the tooth surface, which hardens with a special light. This can fill gaps, repair small chips, and smooth out rough edges. Another option is dental crowns, which are tooth-shaped caps placed over teeth to restore their natural shape and appearance. Veneers are thin, custom-made shells bonded to the front surface of teeth to improve their look. Recontouring or reshaping involves removing small amounts of tooth enamel to change a tooth's length, shape, or surface. These procedures vary in cost, durability, and time required, so it's best to consult with a dentist to determine the right option for you.