Hello. The so-called "buck teeth" means that when you shut up, the distance between the maxillary front teeth and the mandibular front teeth is so large that the maxillary front teeth are exposed outside your lips. This is also called deep coverage of front teeth in medicine. Teeth grow in the maxilla and mandible. Abnormal relative positions of upper and lower teeth and upper and lower jaws may cause "buck teeth". If the jaw position is normal, but the maxillary teeth are crowded and prominent, the treatment is relatively simple, and general orthodontics can solve it.