Pedicle screw and receiver member therefore

Details Pedicle screw and receiver member therefore Pedicle screw and receiver member therefore

A - Human Necessities

61

B

A61B 17/58 (2006.01) A61B 17/70 (2006.01) A61B 17/86 (2006.01)

Patent

CA 2064222

2064222 9101115 PCTABS00003 Disclosed is a pedicle-screw holder designed to be linked by joint with a screw (2) having a threaded shaft (3) and a sphere-segment head (4) and with a rod (16). In order to lower the cost of stocking screws of different shaft lengths and shaft diameters, the holder has a holder space (7) inside it, at one end of which is a bore (8) through which the threaded shaft (3) passes and, adjacent to the bore, on the inside, a hollow sphere-segment section (9) against which the head of the screw (2) to be held rests, and at the end remote from the bore (8) an opening (10) through which the screw (2) can be inserted. The invention also calls for a pressure element (18) which, when screw and holder are assembled, hexerts a force on the screw head such that the head is pressed against the hollow sphere-segment section. The new holder means that only screws with very different shaft dimensions have to be stocked since screws can be inserted in common holders.

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