Size of in plant between the insertion possible and/or to decide height being the operation instrument in order in the between gap between two contiguity bodies of two vertebrae of the person or the rachis of the animal, in plant between the aforementioned , this touch to the joint surface of one side of the contiguity body of the aforementioned two to the other joint surface of the contiguity body of the aforementioned two directly or was supported indirectly on the 1st this connection element and the aforementioned 1st this connection element which this touches to possess with the 2nd this connection element which, this instrument, longitudinal directionWith the retention section which is stipulated and at least being one test in plant, in order the operation instrument where it can provide one which those which possess the 1st and 2nd test in plant this connection element which at least has one where the aforementioned joint surface touches this on the one hand this contact surface respectively possesses, at the same time, in the distal (2036) edge of aforementioned retention section, the description above at least installation and removal is connected to one test in plant unrestrictedly this connection element retention element at least, size of in plant between the and/or height simplicity and with the method of differing deciding to be allowed in order to improve, the description above 1st and/orThe 2nd test in plant this connection element, at the angular position to which two specified differs at least mutually in regard to the aforementioned longitudinal direction, the description above at least installation and removal unrestrictedly being connection possible, is proposed to one this connection element retention element.ヒト又は動物の脊柱の2つの椎骨の2つの隣接椎体の間の椎間間隙に挿入可能な椎間インプラントの大きさ及び/又は高さを決定するための手術器具であって、前記椎間インプラントが、前記2つの隣接椎体の一方の関節面に当接する第1の当接要素と、前記第1の当接要素上に直接又は間接に支持された、前記2つの隣接椎体の他方の関節面に当接する第2の当接要素とを有し、本器具が、長手方向を規定する保持部と、少なくとも1つのテストインプラントであって前記関節面の一方に当接する少なく
