Bone screw

Details Bone screw Bone screw

A - Human Necessities

61

B

A61B 17/58 (2006.01) A61B 17/86 (2006.01) A61B 17/68 (2006.01)

Patent

CA 2045503

ABSTRACT A bone screw (1) has a threaded portion (2) and a head (3). Such screws are used in particular as pedicle screws. In order that the bone screw can be anchored securely also in soft bone tissue, the screw is provided with a longi- tudinal bore (5) extending along the longitudinal axis of the threaded portion (2), the longitudinal bore (5) being provided with a tapered portion (7) opposite to the head (3). In this region of the screw, slits are extending parallel to the threaded portion and an interior thread is provided. An expander part (12) having a tip (14) forming the point of the screw and a shaft (16) having a threaded portion (17) cooperating with said interior thread are provided.

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