Patent ID: 8403959
Filing Date: 2013-03-26
Classification: A61B

Abstract:
1. An implant for treating lumbar spinal canal stenosis comprising: (a) a spacer which can be applied between spinous processes of two adjacent vertebrae, the spacer comprising a front, introduction, side and a rear side and an inner space extending longitudinally through the spacer between the front side and the rear side, wherein the spacer is partly slotted in a longitudinal manner to form a longitudinal slot and wherein the front side of the spacer comprises a formation which extends from the front side of the spacer and forms a part crest or roof; (b) a first retaining element consisting of a first part and a second part which are pivotally held with one another via a pivot, wherein the first retaining element is positioned in the longitudinal slot during introduction of the spacer and can be brought to bear on the spinous processes in proximity to the front side of the spacer after introduction of the spacer; (c) a second retaining element that can be brought to bear on the spinous processes in proximity to the rear side of the spacer after introduction of the spacer; and (d) a push-pull element comprising an insert part, the insert part being displaceably mounted in the longitudinal slot, wherein the insert part comprises a plunger which, on insertion into the longitudinal slot, presses on the first part and the second part of the first retaining element and presses the first part and the second part of the retaining element apart, wherein the spacer comprises a waisted peripheral surface whereby a self-centering of the spacer between two spinous processes is effected.