Jaw abnormality sagittally divides the face into five equal parts: It is insufficient to derive at a diagnosis of jaw deformity solely based on the clinical examination. Hence, additional information is gathered from diagnostic tests, which may include dental model analyses and radiographic imaging studies. Mandibular micrognathia is the condition when lower jaw is smaller than normal. Failure of the ramus to develop will give rise to micrognathia.<ref name="Elsevier/Churchill Livingstone"></ref> Micrognathia can be classified as either congenital or acquired. Clinical appearance of some patients with congenital type of mandibular micrognathia can have a severe retrusion of the chin but by actual measurements,
Jaw wiring each other with elastics, compressing the upper teeth against the lower teeth and preventing jaw movement. IMF is an invasive procedure performed under general anesthesia. Once the bones have set (usually after 8–10 weeks), the wiring is removed under local anesthesia or nitrous oxide sedation. The second type of jaw wiring is called orthodontic jaw wiring (OJW) or dental jaw wiring, and can be used as a treatment for obesity and compulsive overeating. In this procedure, a dentist or orthodontist attaches braces to certain teeth (typically the canines and premolars) and inserts wiring, but not elastics, between the upper and