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
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.
대표청구항▼
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; anda parallel spa
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; anda 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. 2. The system of claim 1, wherein each of the multiple spacer markings indicates a distance between the guide tube and the guide pin residing in the guide pin tube. 3. The system of claim 2, wherein each of the multiple spacer markings indicates the distance when the leading edge of the sliding block is aligned with one of the spacer markings. 4. The system of claim 3, wherein, when the leading edge of the sliding block is aligned with one of the spacer markings, and when the guide tube is positioned within a drill guide used to place the previously placed implant, the one of the spacer markings with which the leading edge is aligned indicates the distance between the previously placed implant and a center of a tubular opening in the guide pin tube cannula. 5. The system of claim 1, wherein a first diameter of the guide pin tube cannula and a second diameter of the drill guide tube cannula are the same. 6. The system of claim 1, wherein the drill guide tube is integrally formed with the parallel spacer block as one piece. 7. The system of claim 1, wherein the guide pin tube is integrally formed with the sliding block as one piece. 8. The system of claim 1, wherein the locking nut is adjustable, relative to the threads, between a loose position, in which the sliding block is free to slide horizontally within the opening of the parallel spacer block, and a tightened position, in which the sliding block is fixedly attached to the parallel spacer block and cannot slide horizontally within the opening.
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