Importance

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Abstract

An interspinous process spacer device that is operable to be positioned between the spinous process of adjacent vertebra. The spacer device includes a body portion having a central bore extending therethrough, where the body portion includes a cylindrical center portion, a tapered front-end portion and a threaded portion, and where the center portion includes circumferentially disposed channels for delivering bone graft material. The spacer device also includes a spacer ring having an outer rim with a larger diameter than the center portion and a threaded opening that allows the spacer ring to be threaded onto the threaded portion. The spacer device further includes a securing member positioned against the spacer ring and including a threaded opening that allows the member to be threaded onto the threaded portion opposite to the center portion so that the spinous process can be locked between the front-end portion and the spacer ring.

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First Claim