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[Permanent constriction of the jaws in children: 3 cases with extra-articular etiology].

Three cases of permanent constriction of the jaw are reported. One was a sequela after a noma, the second occurred in a child with arthrogryposis and the third was an inborn malformation. Each case raised specific problems for diagnosis and treatment. Mechanicotherapy is essential postoperatively and requires a specific electric apparatus to mobilize the joint.