公开(公告)号：US08915917B2

公开(公告)日：2014-12-23

申请号：US13389130

申请日：2010-08-12

申请人： William Doherty ,  Patrick O'Connor ,  James Harty ,  Hannah Dailey ,  Charles Daly ,  Olive O'Driscoll

发明人： William Doherty ,  Patrick O'Connor ,  James Harty ,  Hannah Dailey ,  Charles Daly ,  Olive O'Driscoll

IPC分类号： A61B17/56 ,  A61B17/58 ,  A61F2/30 ,  A61B17/72

CPC分类号： A61B17/725 ,  A61B17/7225 ,  A61B17/7241

摘要： An intramedullary nail has a proximal part for engagement with a proximal bone fragment and a distal part for engagement with a distal bone fragment. A motion assembly interconnects the parts and allows limited axial relative motion of the proximal and distal parts. This limited axial motion provides micromotion and in some embodiments also dynamization. The nail may comprise a stem for fastening to one bone fragment and an insert within the stem for fastening to the other bone fragment, the insert being adapted to guide insertion of a bone screw through the stem and to prevent relative rotation of the distal and proximal bone fragments. The motion assembly may include spring bias and/or damping means between the parts, possibly including one or more Belleville washers.

摘要翻译： 髓内钉具有近端部分，用于与近端骨片段和用于与远侧骨片段接合的远端部分接合。 运动组件互连部件并允许近端和远端部分的有限的轴向相对运动。 这种有限的轴向运动提供微动作，并且在一些实施例中也是动态化。 指甲可以包括用于紧固到一个骨碎片的杆和用于紧固到另一个骨碎片的柄内的插入件，插入件适于引导骨螺钉穿过杆的插入并且防止远端和近端的相对旋转 骨碎片。 运动组件可以包括在部件之间的弹簧偏压和/或阻尼装置，可能包括一个或多个Belleville垫圈。