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    • 7. 发明授权
    • Bone plate with variable torsional stiffness at fixed angle holes
    • 在固定角度孔处具有可变扭转刚度的骨板
    • US07867261B2
    • 2011-01-11
    • US11557429
    • 2006-11-07
    • Robert Sixto, Jr.Jose Luis FranceseJorge L. Orbay
    • Robert Sixto, Jr.Jose Luis FranceseJorge L. Orbay
    • A61B17/80
    • A61B17/80A61B17/8085A61B2017/00004
    • A bone plate includes at least one torsional modification feature (TMF). Each TMF is structured to decrease the torsional rigidity of the plate relative to longitudinally opposite portions, but may be modified to increase the torsional rigidity thereat. Each TMF is defined by beams contiguous with the lateral sides of the plate, and an opening extending laterally therebetween. In a preferred embodiment, opposed projections extend into the opening to define threaded discontinuous wall portions for receiving an insert, such as a set screw. In one embodiment, bioabsorbable and/or bioactive inserts may be used to temporarily increase the torsional rigidity of the plate during initial fixation and thereafter have reduced torsional rigidity to mimic normal callus. The plate is preferably used with fixed angle fasteners that may be subject to high torsional loads post-operatively.
    • 骨板包括至少一个扭转修改特征(TMF)。 每个TMF被构造成降低板相对于纵向相对部分的扭转刚度,但是可以被修改以增加其上的扭转刚度。 每个TMF由与板的侧面相邻的梁以及横向延伸的开口限定。 在优选实施例中,相对的突出部延伸到开口中以限定用于接收插入件(例如固定螺钉)的螺纹不连续壁部分。 在一个实施方案中,可以使用生物可吸收和/或生物活性插入物来暂时增加初始固定期间板的扭转刚度,此后具有降低的扭转刚度以模拟正常愈伤组织。 该板最好与固定角紧固件一起使用,固定角紧固件可能在操作后经受高扭转载荷。