A targeting device (1) for guiding a drill arrangement (11, 12) for forming an arc-shaped bore in an assembly of adjacent bones or bone fragments, comprises a support frame (2 5 7), a pivoting device (8) mounted to the support frame (2 5 7) and arranged to receive the drill arrangement (11 12) and to allow a pivoting movement of the drill arrangement (11 12) along an arc-shaped path having a predetermined radius of curvature rc around a pivot axis (9). The support frame (2 5 7) is provided with at least three fixation devices (3 4 6) each configured to fix one of the bones (14 15 16) or fragments of the bone assembly to define a fixed position in space of the bone assembly (14 15 16) with respect to the pivoting device (8) when the bone assembly is installed to the support frame (2 5 7).一種在相鄰骨骼或骨骼斷片總成中形成弧狀腔孔的鑽頭配置(11,12)引導用之標定裝置(1),包括支座機架(2;5;7),安裝於支座機架(2;5;7)之樞動裝置(8),配置來容納鑽頭配置(11;12),並容許鑽頭配置(11;12)沿預定曲率半徑rc之弧狀途徑,繞樞軸(9)樞動。支座機架(2;5;7)設有至少三個固定裝置(3;4;6),各構成把骨骼總成的骨骼(14;15;16)或斷片之一固定,當骨骼總成安裝於支座機架(2;5;7)時,可界定在骨骼總成(14;15;16)空間內,相對於樞動裝置(8)之固定位置。1‧‧‧標定裝置2‧‧‧主要支座3‧‧‧第一固定裝置4‧‧‧第二固定裝置5‧‧‧第一樞動支座部6‧‧‧第三固定裝置7‧‧‧第二樞動支座部8‧‧‧樞動裝置9‧‧‧樞軸10‧‧‧鑽模11‧‧‧鑽具12‧‧‧圓弧狀管部72‧‧‧轉動支座rc‧‧‧曲率半徑
