A scheme according to the present invention provides a kind of pedicle of vertebral arch anchoring instrument (41). Pedicle of vertebral arch anchoring instrument is configured for use as pedicle screw, i.e. its substantially from back direction (but substantially with sagittal plane it is at an angle, slight inward is towards the sagittal plane) it is implanted in vertebra by pedicle of vertebral arch, so that the distal part for anchoring instrument protrudes into vertebra centrum. Pedicle of vertebral arch anchoring instrument includes having head, bar portion, the pedicle of vertebral arch anchoring implement body of vertical hole, and the proximal end of vertical hole from pedicle of vertebral arch anchoring implement body extends and has one or more apertures, and the one or more aperture is outside from vertical hole, such as radially outward. In addition, pedicle of vertebral arch anchoring instrument include it is embeddable to or the liquefiable element that is embedded in vertical hole, liquefiable element can at least partly liquefy under the influence of the energy proximally imported, thus make liquefied material (22) flow out the vertical hole through multiple apertures of position what wall portion and enter in sclerous tissues and/or hard tissue substituting material structure. Whereby, in liquefiable (preferably thermoplastic) material solidification Hou, shape mating connection type anchoring in sclerous tissues and/or hard tissue substituting material is realized.根據本發明的一個方案，提供一種椎弓根錨固器械（41）。椎弓根錨固器械設置成用作椎弓根螺釘，即其大致從背部方向（但大致與矢狀平面成一角度，輕微向內朝向該矢狀平面）通過椎弓根植入到椎骨內，從而錨固器械的遠側部分伸入脊椎椎體內。椎弓根錨固器械包括具有頭部、杆部、縱孔的椎弓根錨固器械主體，縱孔自椎弓根錨固器械主體的近側端延伸並具有一個或多個開孔，而這一個或多個開孔自縱孔向外，例如徑向向外。另外，椎弓根錨固器械包括可嵌入到或被嵌入到縱孔內的可液化元件，可液化元件可在從近側導入的能量的影響下至少部分液化，從而使已液化的材料（22）經位於壁部的多個開孔流出該縱孔進入硬組織和/或硬組織替代材料結構內。借此，在可液化（優選爲熱塑性的）材料凝固後，實現硬組織和/或硬組織替代材料中形狀配合連接型錨固。
