CHAN, JASON S.,DELL'OCA, ALBERTO A. FERNANDEZ,DELLOCA, ALBERTO A. FERNANDEZ
申请号：
CA2937072
公开号：
CA2937072C
申请日:
2008.08.12
申请国别(地区):
CA
年份:
2017
代理人:
摘要：
A bone screw is elongate along a central axis and comprises a head and a threaded shaft. The head includes an outer surface and has a thread on the outer surface. The thread has a cross-sectional profile comprising a first plurality of peaks each lying on a non-linear curve, a first plurality of troughs each positioned between adjacent ones of the peaks, and a first plurality of flanks that each connect one of the peaks to an adjacent one of the troughs. The cross-sectional profile further comprises a second plurality of peaks that are opposite the first plurality of peaks with respect to the central axis, and a second plurality of troughs that are opposite the first plurality of troughs with respect to the central axis. Each of the second plurality of troughs is positioned between adjacent ones of the second plurality of peaks. The threaded shaft extends from the head along the central axis and is configured and dimensioned to engage a bone. The head defines a plurality of trough profile lines each of which is a straight line perpendicular to the central axis, intersects opposed ones of the first and second pluralities of troughs, and is parallel to others of the plurality of the trough profile lines.
