Patients can determine whether they have buck teeth by the appearance symptoms and the dental X-ray as prescribed by the doctor. 1. Appearance symptoms: Patients with buck teeth usually cannot keep their lips together in the natural state, and the upper front teeth are often tilted to the side of the lips and crowded. The middle of the face is obviously protruding, the lower part of the nose is convex, and the gums are exposed when smiling, which affects the aesthetics to a certain extent. 2. Dental X-ray: Dental X-ray can help the doctor to understand the structure of teeth and jaws, craniofacial soft and hard tissues, and can determine the location and severity of buck teeth. It is also possible to go deeper into the internal bone structure from the surface form to determine whether the buck teeth are skeletal or dental. Buck teeth can be judged according to the appearance, but it is easy to misdiagnose, it is recommended that the patient go to the hospital combined with dental X-ray examination to determine clearly, after diagnosis under the guidance of the doctor to carry out reasonable correction.