The Effect of Frontal Plane Fragment Displacement on Distal Radioulnar Joint Stability in Distal Radius Metaphysis Fractures. Literature Review

Fractures of distal radius metaepifiz (Dmelk) occupy one of the leading positions in damage to the bone-muscular system and most fractures of this anatomical region are still considered as an outpatient version of the injury, which leads to the formation of improper fusion. Another significant argument with non -satisfactory results of fractures of this localization is that they do not pay due attention to damage to soft-tissue anatomical structures. At the moment, the displacements of distal metaepifiz in length, at an angle and rotational, but recently, the displacement of fragments in the frontal plane has recently been studied, which also affects the development of instability of the distal ray-elbow joint. In the frontal (radiation) form of displacement, a displacement of the distal fragment occurs - the methaepephiz of the radial bone in the radial side, and the proximal fragment - the diaphysis of the radius to the elbow with a decrease in the interconnection space. The damaged and not restored anatomy of the distal radius metaepiphyse leads to the development of the incourse of the distal ray-elbow joint and impaired work, both primary (triangular fibrous-chiscaric complex) and secondary (distal inter-cell membrane) of static stabilizers and a dynamic stabilizer (square pronator). With the preserved frontal displacement, the work of both static and dynamic stabilizers is violated. In primary static stabilizers, the radio-ulnar ligaments are primarily floated, which leads to a weakening of the capsule and the spread of the articular surfaces, in secondary static stabilizers, in particular, in the distal inter-cell membar of the forearm, its tension decreases, which in turn leads to a decrease in the tension of the distroxy-lane-lace-lane and lace-plate and development of the pre -porcass instability of the joint. In the described conditions, the work of a dynamic stabilizer is also violated, which has recently assigned an important role in the development of instability of the distal ray-elbow joint in rotary movements. All of the above and is the biomechanical chain of development of the instability of the distal ray-elbow joint. In this article devoted to a review of literature, I would like to show damage to the structures of the cystic joint (distal inter-cell membrane and distal oblique ligament), which affect the subsequent functional outcome, using the example of one type of displacement.