JPWO2020194207A5

JPWO2020194207A5 -

Info

Publication number: JPWO2020194207A5
Application number: JP2021557229A
Authority: JP
Publication date: 2023-02-02
Anticipated expiration: 2040-03-25

Description

[0008]本発明の別の態様によれば、脊椎ロッドを保持するための椎弓根スクリュのヘッドとねじ込み可能に係合するためのセットスクリュが提供される。好ましくは、セットスクリュは、脊椎ロッド対向側とセットスクリュドライバ対向側とを有し、脊椎ロッド対向側からセットスクリュドライバ対向側にセットスクリュを横断するセットスクリュドライバ対向側の開口部と、開口部を取り囲むロッド対向側の環状面とを含み、環状面は、面取りされているかまたは湾曲面を有する。 [0008] According to another aspect of the invention, a set screw is provided for threadably engaging a head of a pedicle screw for retaining a spinal rod. Preferably, the set screw has a spinal rod facing side and a setscrew driver facing side, a setscrew driver facing opening traversing the set screw from the spinal rod facing side to the setscrew driver facing side; and a rod-facing annular surface surrounding the , the annular surface being chamfered or having a curved surface.

[0009]本発明のさらに別の態様によれば、セットスクリュおよびセットスクリュドライバを含む整形外科用ツールキットが提供される。好ましくは、セットスクリュは、脊椎ロッドを保持するための椎弓根スクリュのヘッドとねじ込み可能に係合するように構成され、セットスクリュは、脊椎ロッド対向側とセットスクリュドライバ対向側とを有する。さらに、セットスクリュは、脊椎ロッド対向側からセットスクリュドライバ対向側にセットスクリュを横断するセットスクリュドライバ対向側の開口部と、開口部を取り囲むロッド対向側の環状面とを含む。さらに、好ましくは、セットスクリュドライバは、シャフトと、開口部を介してセットスクリュに係合するための係合部とを含み、係合位置において、係合部の前面部は、セットスクリュの脊椎ロッド対向側から突出する。 [0009] According to yet another aspect of the invention, an orthopedic toolkit is provided that includes a set screw and a set screw driver. Preferably, the set screw is configured to threadably engage the head of the pedicle screw for retaining the spinal rod, the set screw having a spinal rod opposite side and a set screw driver opposite side. Further, the setscrew includes a setscrew driver-facing opening traversing the setscrew from the spinal rod-facing side to the setscrew driver-facing side and a rod-facing annular surface surrounding the opening. Further preferably, the setscrew driver includes a shaft and an engaging portion for engaging the setscrew through the opening, wherein in the engaged position the front surface of the engaging portion extends from the spine of the setscrew. It protrudes from the opposite side of the rod.

Claims

A set screw (230) for threadably engaging the head of a pedicle screw for retaining a spinal rod, said set screw (230) having opposite sides of the spinal rod and a set screw driver. has
a setscrew-driver- facing opening (232) that traverses completely across the setscrew (230) from the spinal-rod-facing side to the setscrew-driver-facing side, wherein the setscrew (230) passes through the pedicle; an opening (232) including an engagement mechanism for engaging a set screw driver to threadably tighten the screw ;
an annular surface (234) opposite the spinal rod surrounding the opening (232) ;
a set screw.

The set screw of claim 1 , wherein the annular surface (234) is slanted, flat, or spherical with radial curvature.

The set screw of claim 1 , wherein said annular surface (234) is an integral part of said set screw (230) .

An orthopedic toolkit comprising a set screw (230) and a set screw driver (200) , said set screw (230) threadably engaging a head of a pedicle screw for retaining a spinal rod. wherein said set screw (230) has a spinal rod opposite side and a set screw driver opposite side, said set screw:
a setscrew driver- facing opening (232) completely across the setscrew (230) from the spinal rod facing side to the setscrew driver facing side, wherein the setscrew (230) extends into the vertebral arch; an opening (232) including an engagement mechanism for engaging said set screw driver to threadably tighten a root screw ;
an annular surface (234) opposite the spinal rod surrounding the opening (232) ;
The set screw driver (200)
a shaft;
an orthopedic surgical toolkit comprising: an engagement portion (220) for engaging said engagement feature of said set screw (230) to tighten said set screw (230).

In the engagement position between the set screw (230) and the set screw driver (200) , the front surface portion (222) of the engagement portion (220) of the set screw driver (200) engages the set screw (230). 5. The orthopedic toolkit of claim 4 , projecting from opposite sides of the spinal rod of the .

An orthopedic toolkit according to claim 4 or 5 , wherein said annular surface (234) is an integral part of said set screw (230) .

An orthopedic toolkit according to claim 4, 5 or 6 , wherein the annular surface (234) of the set screw (230) is flat, chamfered or spherical.

The orthopedic toolkit of claim 7 , wherein the annular surface (234) is spherical with radial curvature.

5. Claims 4, 5, wherein a tip (222) of said engaging portion (220) of said setscrew driver (200) is curved and has an apex substantially on the central axis (HA) of said setscrew driver; An orthopedic toolkit according to 6, 7 or 8 .

8. Claims 4, 5, 6, 7, wherein said annular surface (234) of said set screw ( 230 ) is flat and oriented perpendicular to the axis of rotation (HA) of said set screw (230) ; An orthopedic toolkit according to 8 or 9 .