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POLYAXIAL BONE FIXATION ELEMENT
专利权人:
Medos International Sarl
发明人:
Christopher Ramsay,John DiVincenzo
申请号:
US16871085
公开号:
US20200268416A1
申请日:
2020.05.11
申请国别(地区):
US
年份:
2020
代理人:
摘要:
A fastener device includes an anchor body that defines a through hole. The anchor body further includes an inner surface that defines a least a portion of the through hole. The fastener includes a head, a threaded shaft that extends out with respect to the head in a distal direction, and a neck between the head and threaded shaft. The head includes an outer surface configured to articulate along the inner surface when the fastener head is inserted in the through hole. At least a portion of the outer surface is convex and defines a portion of a sphere that defines a first diameter. The neck defines a second diameter and the fastener defines a ratio of the first diameter to the second diameter in a range between about 2 to 1 and about 3 to 1.
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