The correct term for a geodesic is mandibular protrusion, which can be categorized as dental or bony. Dental mandibular protrusion can be corrected by orthodontic treatment after adulthood, and bony mandibular protrusion can be corrected by orthodontic and maxillofacial joint treatment after adulthood, as follows. 1. Dental mandibular protrusion: only the teeth are arranged abnormally, and the relative position of the upper and lower jaws is not abnormal, it can be corrected by orthodontic treatment, the protruding mandibular dentition is inwardly retracted, and the upper and lower jaws are lined up and leveled off, so as to establish a good occlusal contact relationship. 2. Bony mandibular protrusion: the teeth are abnormally aligned and the relative position of the jaws is abnormal, which requires a combination of orthodontic treatment and orthognathic treatment, preoperative orthodontics to align the teeth, orthognathic surgery to adjust the relative position of the upper and lower jaws, and postoperative orthodontics to establish a stable occlusal relationship to maintain the effect of the surgery. It is recommended to visit a regular medical institution to receive professional treatment.