IMPLANT FOR OSSEOUS ANCHORING WITH POLYAXIAL HEAD

摘要

The present invention relates to an osseous anchorage implant comprising fixation means capable of receiving and fixing at least one bar, in particular of osteosynthesis, the implant 1 comprising on the one hand osseous anchoring means 10 and on the other hand a fixation head 11 bearing the fixation means, the fixation head being traversed by at least one channel 12 receiving the bar 2, and comprising clamping means 4 capable of clamping the bar against one inside wall, called support wall 32, the implant 1 being characterized in that the fixation means 4 and said support wall 32 enable obtaining, prior to blocking of the fixation, a determined clearance in rotation around at least one first axis d3 not parallel to the longitudinal axis of the bar, in that the clamping means comprise a face at the contact of the bar, called the moving clamping surface 120, the moving clamping face 420 of the clamping means 4 being borne by a support head 42 articulated at the end of the clamping means 4 by a ball and socket connection, and in that the channel 12 has the form of an open channel having an aperture 120 opening onto one of the lateral faces of the fixation head 11, an edge 124 of said aperture bearing the clamping means 4, the aperture 120 of the channel and the position of the clamping means thus enabling the introduction i of the bar by the lateral route.