Ankylosis of a mandibular joint - restriction of mobility or an immovability of a mandible.

Etiology. Infectious arthritises, a trauma, including patrimonial.

Pathogenesis. An osteal or fibrous adnation of articulate surfaces which is bound to damage or destruction of an articulate cartilage. Develops slowly - months, years.

Signs. The proof data of jaws full or partial, usually unilateral. Deformation of a mandible is expressed the more strongly, than the ankylosis earlier was generated. Are truncated a branch and a body of the mandible on the party of a lesion. The chin is displaced in this party and back. At a bilateral ankylosis - a microgenia (« the bird's face »). Angles of a mandible act. Dental arches the articulation is deformed, broken. The plentiful odontolith, a lateral teeth are inclined. A milk teeth are quite often kept. Reception of peep is complicated. On the roentgenogram elements of a joint are not differentiated. Osteal tension can go from articulate and coronal processes to the basis of a skull. Treatment operative - an osteotomy of a branch of a mandible. In the postoperative period - механо-therapy. At an osteotomy use articulate heads from polymeric materials. At false ankyloses probably violent extension of jaws.

The forecast. Osteal ankyloses lead to proof deformations and frustration of function of jaws; at false ankyloses the forecast more favorable.

Prophylaxis: rational therapy of arthritises, the prevention of a birth trauma.