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Polyaxial bone anchoring device
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
发明人:
ルッツ・ビーダーマン,ビルフリート・マティス,ミヒャエル・ケーゲル
申请号:
JP2011279564
公开号:
JP6071193B2
申请日:
2011.12.21
申请国别(地区):
JP
年份:
2017
代理人:
摘要:
A polyaxial bone anchoring device is provided including an anchoring element (1) having a shaft (2) for anchoring in the bone and a head (3), the head having a curved outer surface portion; a receiving part (5) having a top end (5a) and a bottom end (5b), a channel (12) for receiving a rod therein, a coaxial bore (51) extending from the top end (5a) in the direction of the bottom end (5b) and a seat portion (52) for receiving the head at the bottom end; a pressure element (6) arranged within the bore, the pressure element having a head contacting surface portion (62,63) that contacts the curved outer surface portion of the head; wherein the head is pivotable with respect to the receiving part and can be fixed at an angle by exerting pressure via the pressure element onto the head, and wherein the head has an oversize in the curved outer surface portion with respect to the head contacting surface portion such that an interference fit is achieved that clamps the head by the friction between the outer surface portion and the head contacting surface portion.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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