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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.
A fracture is a break in a bone. Most involve a single, significant force applied to normal bone. In a closed fracture, the overlying skin is intact. In an open fracture, the overlying skin is disrupted and the broken bone is in communication with the environment. Pathologic fractures occur when mild or minimal force fractures an area of bone weakened by a disorder (eg, osteoporosis, cancer, infection, bone cyst). When the disorder is osteoporosis, they are often called insufficiency or fragility fractures.