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拡大した回動角度を有する多軸骨アンカー固定装置
专利权人:
ビーダーマン・テクノロジーズ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング・ウント・コンパニー・コマンディートゲゼルシャフトBIEDERMANN TECHNOLOGIES GMBH & CO. KG
发明人:
ルッツ・ビーダーマン,マルティン・メーア
申请号:
JP20120180032
公开号:
JP6073597(B2)
申请日:
2012.08.15
申请国别(地区):
日本
年份:
2017
代理人:
摘要:
A polyaxial bone anchoring device is provided including an anchoring element (1) having a shank (2) for anchoring in the bone and a head (3), the head having a spherically-shaped outer surface portion (3a); a receiving part (4), the receiving part having a top end (4a) and a bottom end (4b), a central axis (C) extending through the top end and the bottom end, a transverse channel (9) for receiving a rod (100) and an accommodation space (11) for accommodating the head (3), the accommodation space (11) having a lower opening (12) at the bottom (4b), a sleeve-like insert piece (5) encompassing a portion of the head (3) and being configured to pivot in the accommodation space (11) of the receiving part (4), a pressure member (6), the pressure member being arranged at least partially in the accommodation space (11) and wherein the pressure member has a lower surface portion (61) that contacts the head (3) to exert pressure onto the head; wherein the anchoring element (1) is pivotable with respect to the receiving
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