FIELD: medicine; orthopedics. SUBSTANCE: apparatus comprises two horizontal distractors and four vertical distractors 3. The latter serve to interconnect in pairs horizontal distractors and are constituted by two interchangeable parts. Horizontal distractors are made in the form of threadedly interconnected and have adjusting elements 4. All threaded connections and their adjusting elements 4 of each interchangeable part of apparatus are positioned diagonally in relation to its vertical axis. Ends of arcs 1, 2 of horizontal distractors carry clamps 5 adapted to secure pins 7. EFFECT: effective aid. 1 dwg
