| 摘要 |
A device for percutaneous transpedicular fusion includes at least two straight pedicular cannulas arranged respectively on the upper or lower vertebra, or on the two vertebrae of the spinal segment, at least one guide pin with a curved profile, which is implanted in the endplate of the corresponding vertebra through the corresponding pedicular cannula, of a flexible cannulated drill bit guided around the corresponding guide pin and driven in back and forth movements by a cannulated drive system to nibble out gradually slots in the lower and upper endplate of each vertebra and reduce to flaps the nucleic tissues of an intervertebral disk for the production of the intersomatic space, of an injection device connected to one of the straight pedicular cannulas for the injection of the graft into the intersomatic space, and closing devices that are screwed into the holes left free after retraction of the straight pedicular cannulas. |
| 主权项 |
1. Device enabling the placement and the injection of an autologous or biological graft 8) into an intersomatic space Es that has been arranged beforehand between two upper and lower vertebrae Va, Vb of a spinal segment, in order to bring about an intersomatic fusion by an entirely percutaneous transpedicular approach, wherein the device comprises at least two straight pedicular cannulas (2a, 3a; 2b, 3b) arranged respectively on the upper vertebra Va or on the lower vertebra Vb, or on the two vertebrae Va, Vb of the spinal segment of at least one guide pin (4) with a curved profile, which is implanted in the endplate Pi, Ps of the corresponding vertebra Va, Vb through the corresponding pedicular cannula, a flexible cannulated drill bit (5) guided around the corresponding guide pin (4) and driven in back and forth movements by a cannulated drive system (6) so as to nibble out gradually and in a controlled manner slots F in said lower endplate Pi and upper endplate Ps of each vertebra Va, Vb and reduce to flaps the nucleic tissues of an intervertebral disk D for the production of the intersomatic space Es, an injection device (7) connected to one of the straight pedicular cannulas (2a, 3a; 2b, 3b) for the injection of the graft (8) into the intersomatic space Es thus produced, and closing devices (9) that are screwed into the holes left free after the retraction of said straight pedicular cannulas. |
