System for joint fusion

摘要

Techniques for joint fusion are described, including a drill guide assembly having a drill guide and a pin sleeve, the drill guide including a drill guide head having an opening, a shaft configured to receive the pin sleeve, a drill guide tip configured to engage a bone, and a cannula configured to receive an implant, a first guide pin configured to guide placement of the drill guide, a striker tube configured to fit over at least a portion of the pin sleeve, a cannulated drill bit configured to drill a pilot hole in a bone tissue, a stop collar configured to be placed over the cannulated drill bit and to be attached to the cannulated drill bit using a ridge, and a parallel spacer instrument configured to guide placement of a second guide pin at a distance from the implant after the implant is implanted into the bone tissue.

主权项

1. A system for guiding placement of a guide pin at a distance from a previously placed implant, which was previously implanted in a bone, the system comprising:
a drill guide, comprising:
a handle;a drill guide head;a cannula; anda drill guide tip having a bone engaging structure; and a parallel spacer device, comprising:
a parallel spacer block, comprising a top surface, a bottom surface, an opening and multiple spacer markings positioned on the top surface, adjacent the opening;a drill guide tube extending from the bottom surface of the parallel spacer block and having an outer diameter operative to fit within the cannula of the drill guide, wherein the bottom surface of the parallel spacer block rests on a top surface of the drill guide head when the drill guide tube is fully inserted into the cannula of the drill guide;a drill guide tube cannula disposed within the drill guide tube;a sliding block fitted at least partially within the opening of the parallel spacer block, such that the sliding block can slide horizontally within the opening, wherein the sliding block includes a leading edge;a guide pin tube coupled with and extending through the sliding block, wherein an upper portion of the guide pin tube includes a threaded portion and extends through the opening of the parallel spacer block;a guide pin tube cannula disposed within the guide pin tube and configured to receive the guide pin; anda locking nut attached to the guide pin tube via threads on the guide pin tube, to securely couple the sliding block to the parallel spacer block.