Your jaw is a set of bones that holds your teeth. It includes:
- The maxilla, which is the upper part of your jaw. It holds your top teeth in place and doesn't move. It also supports the muscles involved in chewing and facial expressions.
- The mandible, which is the lower part of your jaw. You move it when you talk or chew. It also holds your lower teeth in place.
- The temporomandibular joints (TMJs), which are two joints (one on each side) that connect your mandible to your skull.
Jaw problems can include:
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Jaw Injuries Disorders
- Jaw Injuries and Disorders (National Library of Medicine)... Diagnostic imaging tests are often used to diagnose jaw injuries and disorders. Your treatment will depend on which jaw problem you have.
- Facial Injuries and Disorders (National Library of Medicine)... in the bones of your nose, cheekbone and jaw, are common facial injuries. Certain diseases also lead to facial disorders. For example, nerve diseases like trigeminal ...
- Malocclusion (Misaligned Teeth) (Merck & Co., Inc.)Jaw Injuries and Disorders/Specifics ... Jaw Injuries and Disorders
- Jaw Dislocation (Merck & Co., Inc.)Jaw Injuries and Disorders/Specifics ... Jaw Injuries and Disorders
- Jaw Injuries and Disorders/Clinical Trials ... Jaw Injuries and Disorders
- Jaw Injuries and Disorders/Clinical Trials ... Jaw Injuries and Disorders
- Jaw Injuries and Disorders/Clinical Trials ... Jaw Injuries and Disorders
- Fractures of the Jaw and Midface (Merck & Co., Inc.)Jaw Injuries and Disorders/Specifics ... Jaw Injuries and Disorders
- Osteonecrosis of the Jaw (ONJ) (American College of Rheumatology)Jaw Injuries and Disorders/Specifics ... Jaw Injuries and Disorders
(American Association of Oral and Maxillofacial Surgeons) 
(National Institutes of Health) 