| 摘要 |
A tack for insertion into facets joints of the human spine includes one or more bioactive materials. The tack is preferably pushed/impacted axially into a hole in the facets, rather than rotated or screwed into the hole/facets. For example, the bioactive material may be outer sidewall(s) made of porous material that receives and/or encourages bone growth into its pores. Or, for example, the bioactive material may be osteobiologic material, demineralized bone matrix (DBM), sponge holding bone morphogenic protein (BMP), allograft bone, or other bioactive material inside an interior space of the tack. Apertures may be provided in the outer wall of a hollow tack to allow bone growth into the interior space of the tack. The tack may have a longitudinal passage, so that the tack may be installed on and slid along a guide-wire in percutaneous surgery that is guided by intraoperative imaging navigation. Preferably, the tack is not threaded, and is installed with little, and preferably no, rotation of the tack on its longitudinal axis.
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