发明名称 Coupling assembly for coupling a rod to a bone anchoring element, and polyaxial bone anchoring device
摘要 A coupling assembly is provided comprising a receiving part (5, 5') having a first end (5a), a second end (5b) and a central axis (C) extending through the first end (5a) and second end (5b), a recess (52) for receiving a rod (100), the recess having a bottom, and an accommodation space (54, 54') for accommodating a head (3) of an anchoring element (1), the accommodation space having an opening (55, 55') at the second end (5b) sized so as to permit the insertion of the head (3) and a bore extending from the accommodation space to the first end (5a), a retainer element (6, 6') configured to be positioned at least partially in the accommodation space (54, 54') and sized so as to at least partially encompass an inserted head (3); wherein the retainer element (6, 6') comprises at least one spring portion (66a, 66b; 66') that is compressible in an axial direction and that extends in an axial direction at least up to a position toward the first end (5a) of the receiving part that is higher than the bottom of the channel (52) for the rod.
申请公布号 EP2893889(A1) 申请公布日期 2015.07.15
申请号 EP20140151004 申请日期 2014.01.13
申请人 BIEDERMANN TECHNOLOGIES GMBH & CO. KG 发明人 BIEDERMANN, LUTZ;SCHÜNEMANN, ACHIM;DANDANOPOULOS, DIMOSTHENIS
分类号 A61B17/70 主分类号 A61B17/70
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