Dynamic stability or the device has the installation and others re ru long component in inside the proximal destal of the anchor instrument which is laid out in the Vertebra body which is approached. For example, the flexible element which has elastic property in inside the applicable field of the kind of load which is the load which the vertebra receives is laid out in interval the proximal destal of the long component. At least one additional flexible element it approaches to the median flexible element in around the proximal destal of the long component the installation and others re ru. The frame encloses the proximal destal of the component, the flexible element and the additional flexible element are included there. Because it is added compression, vis-a-vis the component whose tension, angular power, shear force, and torque are long, the median flexible element and the additional flexible element operation the long component and frame mutually, the movement of the long component is made possible.動的安定か装置は、近接する椎体において配置されるアンカリング器具の近位端部内において取り付けられる細長い部材を有する。例えば脊椎が受ける負荷であるような負荷の適用可能な領域内において弾性特性を備える可撓性要素は、細長い部材の近位端部間において配置される。少なくとも1つの追加的な可撓性要素は、中央可撓性要素に近接する細長い部材の近位端部の周囲において取り付けられる。筐体は、部材の近位端部を封入し、可撓性要素及び追加的な可撓性要素はそこに包含される。圧縮力、張力、角度力、剪断力、及び回転力が細長い部材に対して加えられるため、中央可撓性要素及び追加的な可撓性要素は、細長い部材及び筐体と相互作用し、細長い部材の動きを可能にする。
