| 发明名称 | Polyaxial bone screw | ||
| 摘要 | The present invention generally provides a polyaxial fixation device having a shank with a spherical head formed on a proximal end thereof, and a receiver member having an axial passage formed therein that is adapted to polyaxially seat the spherical head of the shank. The polyaxial bone screw further includes an engagement member that is adapted to provide sufficient friction between the spherical head and the receiver member to enable the shank to be maintained in a desired angular orientation before locking the spherical head within the receiver member. | ||
| 申请公布号 | US9463049(B2) | 申请公布日期 | 2016.10.11 |
| 申请号 | US201514848417 | 申请日期 | 2015.09.09 |
| 申请人 | DePuy Synthes Products, Inc. | 发明人 | Konieczynski David D.;Doherty Thomas V.;Whipple Dale E.;Casey Niall;Hall Mark T. |
| 分类号 | A61B17/70;A61B17/86 | 主分类号 | A61B17/70 |
| 代理机构 | Nutter McClennen & Fish LLP | 代理人 | Nutter McClennen & Fish LLP |
| 主权项 | 1. A polyaxial bone anchor assembly, comprising: a shank having a spherical head formed on a proximal end thereof; a receiver member adapted to receive a spinal rod and having a distal opening though which the shank extends and a distal seat in which the head of the shank is polyaxially seated; and a compression cap having first and second leaf springs, and wherein the receiver member includes first and second deformable portions that, upon deformation, are effective to urge the first and second leaf-spring members toward one another to cause the compression cap to frictionally engage the spherical head of the shank. | ||
| 地址 | Raynham MA US | ||