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A broken jaw (or mandible fracture) is a common facial injury. Only the nose is broken more frequently. A broken jaw is the 10th most common fractured bone in the human body. Fractures (breaks in the bone) are generally the result of a direct force or trauma to the jawbone (mandible). A dislocated jawbone means that the temporomandibular joint (where the jaw connects with the skull) is moved out of place.
The maxilla is the fusion of two bones and forms the upper jaw. The maxilla attaches to the zygomatic or cheek bones. The maxilla holds the upper teeth. The mandible is also known as the lower jaw. It holds the lower teeth. The mandible is connected to the upper part of the skull by two jaw joints.