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BONE ANCHORING DEVICE
专利权人:
BIEDERMANN TECHNOLOGIES GMBH &; CO. KG
发明人:
Wilfried Matthis,Martin Meer,Lutz Biedermann
申请号:
US16440741
公开号:
US20190290333A1
申请日:
2019.06.13
申请国别(地区):
US
年份:
2019
代理人:
摘要:
A polyaxial bone anchoring device includes a bone anchoring element having a head and a shaft, a receiving part having a head receiving portion, a rod receiving portion, and a bore having a bore axis, and a pressure member movable in the bore and having a first surface for engaging the head, wherein the pressure member is movable to a first position where friction between the first surface and the head generates a preload on the head to maintain the shaft at a temporary angular position relative to the receiving part, and wherein the pressure member is configured to engage the receiving part to generate a holding force for holding the pressure member at the first position without a positive lock, and wherein the pressure member is movable in and out of the first position by applying an axial force on the pressure member greater than the holding force.
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