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Broken Jaw

Broken Jaw Overview

A broken jaw (or mandibular fracture) is a common facial injury. Only the nose is broken more frequently. A broken jaw is the tenth most common fractured bone in the human body. Fractures (these are breaks in the bone) are generally the result of a direct force or trauma to the jawbone.

  • The jawbone, or mandible, is the largest and main bone of the lower part of the face. The chief areas of the mandible bone are the body (chin out to the jaw angle) and the 2 upward branches, called the rami.
  • Men are about 3 times more likely than women to sustain a broken jaw. Those aged 20-29 years are the most common group affected.



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Broken Jaw

Sprains and Strains Overview

The body is meant to move. Muscles allow that movement to happen by contracting and making joints flex, extend and rotate. Muscles attach on each side of the joint to bone by thick bands of fibrous tissue called tendons. When a muscle contracts, it shortens and pulls on the tendon, which allows the joint to go through a range of motion.

A strain occurs when the muscle tendon unit is stretched or torn. The most common reason is the overuse and stretching of the muscle. The damage may occur in three areas:

  • The muscle itself may tear.

  • The area where the muscle and tendon blend can tear.

  • The tendon may tear partially or completely (rupture).

Joints are stabilized by thick bands of tissue called ligaments which surround them. These ligaments allow the joint to move only in specific directions. Some joints move in multiple planes; therefore, they need mor...



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Read What Your Physician is Reading on eMedicine

Facial Trauma, Mandibular Fractures »

The first description of mandible fractures was as early as 1650 BC, when an Egyptian papyrus described the examination, diagnosis, and treatment of mandible fractures.

Read More on eMedicine »

Medical Dictionary