During protruding professional thesis (1) during protruding has the introduction possible intermediate part (2) in the space, this intermediate part starts and central axis (4) and the inside edge (7) with the outer edge (8) with this outer edge (8) from the extended section which extends to radial and diameter direction vis-a-vis central axis (4) possesses (3), during protruding of the cone which this extended section adjoins two it is introduction possible in the space, in order to receive the symmetrical partner component (6) substantially vis-a-vis professional thesis (1) the intermediate part (2), the extended section that inside edge of the one which leaves from (3)(7) it possesses the axis direction concave section (5).棘突起間プロテーゼ(1)が棘突起間空間に導入可能な中間部分(2)を有し、この中間部分が中心軸線(4)と内端(7)と外端(8)とこの外端(8)から出発して中心軸線(4)に対して半径方向および直径方向に延びる延長部(3)とを有し、この延長部が2つの隣接する錐体の棘突起間空間に導入可能であり、プロテーゼ(1)に対して実質的に対称な相手部材(6)を受容するために中間部分(2)が、延長部(3)から離れた方のその内端(7)に軸線方向凹部(5)を有する。
