Abstract: An apparatus, comprising a supporting and a rotatable stirrup together with respective wire spokes, intended for being drawn through juxtapositional bones and joints, forms two rigid systems. Said rigid systems are joined together by means of distractors with hinge joint fastenings, situated at the two ends of the wire spoke of the supporting stirrup. The position of the fulcrums of the hinge joints determines the position of the apparatus' axis of rotation. A special regulator is provided for adjusting the position of the axis of rotation of the apparatus which comprises a means for rotating the fulcrum of the hinge joint fastening the distractors and a means for moving the fulcrums of the hinge joints along the distractors connecting the supporting and rotatable stirrups.