The apparatus for bone treatment of the spine comprises a screw nut with clockwise screw thread and a screw nut with counterclockwise screw thread. Both screw nuts are socket in an axis with clockwise screw thread and counterclockwise screw thread. Four rods connect these two screw nuts and connect two beams. Wherein, using a tool to spin the axis can move these two screw nuts with opposite direction. When these two screw nuts are close to each other, the apparatus is packed. When these two screw nuts depart, these two beams can expand the collapsing spine.一種椎體撐開裝置,其順向螺母與逆向螺母係以反向的螺紋套接於雙向螺紋螺栓上,第一支撐件及第三支撐件分別以一端軸接在順向螺母之上、下側,第二支撐件及第四支撐件分別以一端軸接在逆向螺母之上、下側,第一支撐件與第二支撐件之另一端軸接在一個撐開件之側面,第三支撐件與第四支撐件之另一端軸接在另一個撐開件之側面,其中轉動雙向螺紋螺栓會使順向螺母與逆向螺母反向移動,當順向螺母與逆向螺母靠近時,二個撐開件靠攏收近,當順向螺母與逆向螺母遠離時,二個撐開件會撐開塌陷的椎體,便於後續灌入骨水泥。10‧‧‧椎體撐開裝置30‧‧‧雙向螺紋螺栓3002‧‧‧順向螺紋3004‧‧‧逆向螺紋3006‧‧‧導溝32‧‧‧順向螺母34‧‧‧逆向螺母3602‧‧‧第一支撐件3604‧‧‧第二支撐件3606‧‧‧第三支撐件3608‧‧‧第四支撐件38‧‧‧撐開件40‧‧‧傳動部件42‧‧‧導入部件
