Rezach, William A.,Schwender, James D.,Transfeldt, Ensor E.,Pinto, Manuel R.,Perra, Joseph H.,Veldman, Michael S.,Garvey, Timothy A.,Denis, Francis
申请号：
AU2007214936
公开号：
AU2007214936B2
申请日:
2007.02.08
申请国别(地区):
AU
年份:
2013
代理人:
摘要：
A bone screw (10) comprising a threaded shank (52) including a distal end portion(50a) and a proximal end portion (50b), and defining a first threaded section(60) extending from the distal end portion (50a) toward the proximal end portion(50b) and adapted for anchoring in cancellous bone, and a second threaded section(62) extending contiguously from the first threaded section (60) toward theproximal end portion (50b) and adapted for engagement in cortical bone, withthe second threaded section (62) having a finer thread pattern relative to thefirst threaded section (60). In one embodiment, the first threaded section (60)includes a first helical threading (64) defining a single lead thread patternfor anchoring in cancellous bone, and the second threaded section (62) includesa second helical threading (66) interleaved with the first threading (64) todefine a duel lead thread pattern for engagement in cortical bone. In a furtherembodiment, the bone screw (10) includes a head portion (54) extending from thethreaded shank (52) and configured for coupling to a spinal implant.
