TECHNOLOGY FOR TREATMENT OF OLD FRACTURES AND DISLOCATIONS MONTEGIA

Old Monteggia fracture-dislocation is characterized by a fracture of the upper third of the ulna with angular displacement of the fragments, dislocation of the head of the radius, rupture of the annular ligament, and a significant period, more than 2 weeks, from the moment of injury. Fragments of the ulna grow together, as a rule, at an angle, the apex of which is directed to the radial side. In this case, due to the angle of deformation, the ulna shortens relative to the radius, the interosseous space decreases, and the tension of the interosseous membrane weakens, due to which even the openly reduced head of the radius is not held in the joint. With a significant period of time since the injury, the growth of the radius, deprived of support in the humeroradial joint, becomes excessively intense, as a result of which the length of the radius becomes greater than the relative length of the radius on the healthy limb. These features of Monteggia fracture-dislocation in children determine a significant number of unsatisfactory surgical outcomes and the ineffectiveness of conservative methods of treatment.