Polyaxial bone anchor with compound articulation and pop-on shank
作者： Roger P. Jackson , James L. Surber
DOI:
关键词:
摘要: A polyaxial bone screw assembly includes a threaded shank body having an integral head receivable in one-piece receiver upper channel for receiving longitudinal connecting member and lower cavity cooperating with opening. compression insert (some independent tool lock, lock release feature and/or friction fit feature) split retaining ring articulatable respect to both the (prior locking) cooperate provide pop- or snap-on of either prior after implantation into vertebra.
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