Patent ID: 9101420
Filing Date: 2015-08-11
Classification: A61B

Abstract:
1. A device for fixation of bone fragments at bone fractures, wherein: the device comprises at least two fixation means, a securing plate and at least one securing means for the fixation means, the fixation means each have a first fixing portion for fixing the fixation means in an inner bone fragment, a second fixing portion to serve in conjunction with the securing means for locking the fixation means in a hole, the holes running through the securing plate disposed on the outside of an outer bone fragment without fixed connection with the outer bone fragment, the second fixing portion allowing movement of the outer bone fragment relative to the securing plate, so that the fixation means are prevented from changing an angular position relative to the securing plate and relative to one another, and a middle portion which is situated between the first and second fixing portions, the middle portion running through the outer bone fragment, the middle portion being configured to allow the outer bone fragment during compression after completion of surgery to slide inwards away from the securing plate and towards the inner bone fragment in which the fixation means are fixed, and at the same time, cease its abutment against the securing plate in which the fixation means are located, thereby defining a space between the outer bone fragment and the securing plate, and the securing means having an external thread screwed firmly into a hole in the securing plate, the second fixing portion of each fixation means includes an unthreaded rear end portion which narrows conically in the screwing-in direction of the fixation means, the at least partly threaded holes running through the securing plate include a corresponding conically narrowing unthreaded portion to receive the cone-shaped rear end portion of the respective fixation means, and the fixation means is locked to the securing plate as the securing means presses the conically narrowing end portion of the fixation means into abutment against the conically narrowing portion of the hole in the securing plate when the securing means is screwed firmly into the hole in the securing plate.