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Internal Derangement occurs when the disk inside the joint is located in front of its normal position. In this medical condition without reduction, the disk is not able to slip back into its normal position and movement of the jaw is limited. In internal derangement with reduction, the disk is located in front of its normal position, only when the mouth is closed. Once the mouth opens and the jaw slides forward, the disk is able to slip back into its normal position, producing a popping sound or clicking sound as it does when the mouth closes, the disk slips forward again, frequently producing another sound. Usually, symptoms like popping or clicking in the joint when mouth opens wide or the jaw shuts from side to side occurs in internal derangement. About 20% of all individuals have internal derangement, with no symptoms. To diagnose the internal derangement, the dentist performs an examination while the person slowly opens closes the mouth. Treatment is required in patients with internal derangement, when they have trouble moving the jaw or if there is pain in the jaw. If a patient seeks treatment promptly after symptoms start to develop, a doctor can be able to push the disk back into its normal position. If the patient has this condition for less than 3 months, a doctor can apply a splint that holds the lower jaw forward the supporting ligaments to tighten. Over the period of 2 to 4 months, the physician adjusts the split to permit the jaw back to its normal position. A dentist gives advice to the patient with internal derangement to avoid opening the mouth wide and avoid opening the mouth wide, when biting or yawning after the internal derangement procedure is over. Individuals with this condition must cut food into smaller pieces and eat the food which is easy to chew. If the internal derangement not treated with non-surgical methods, an oral maxillofacial surgeon can make surgery to reshape the disk and sew it back to its place. However, surgery in this situation is rare. Frequently, patients with internal derangement may have tightness and jaw muscle aches.
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