the implant engaging members may be advanced between and a pusher assembly to drive or force a spinal rod into the
open and closed positions relative to one another. rod receiving channel of an implant held by the implant
In one aspect of the present invention, the pusher bar holder; to provide such a set of tools in which the pusher
includes a pair of opposed legs defining a slot extending assembly is adapted for interchangeable use with different
therebetween. A lower cross member extends between the 5 implant holders; to provide such a set of tools in which the
opposed legs at lower ends thereof and an upper cross pusher assembly is securable to the implant holders; to
member extends between the opposed legs at upper ends provide such a set of tools which is adapted for use with
thereof. The lower cross member or abutment member is tools for use in installing caps having sets screws with break
adapted to engage a spinal rod and advance the spinal rod off heads secured thereto; and to provide such a set of tools
into a seated relationship with the rod receiving channel of "> which are relatively easy to use and particularly well
an implant. adapted for their intended usage.
The seating apparatus utilizing the pusher assembly with Other objects and advantages of this invention will
the slotted pusher bar is adapted for use in combination with become apparent from the following description taken in
a cap inserter having a handle, a stem and a head, the head conjunction with the accompanying drawings wherein are
of the cap inserter having a socket formed therein and 15 set forth, by way of illustration and example, certain
adapted for removably securing an implant cap to the head embodiments of this invention.
of the cap inserter. The slot in the pusher bar is sized to allow The drawings constitute a part of this specification and
insertion therethrough of a cap and at least a portion of the include exemplary embodiments of the present invention
cap inserter, to which the cap is removably secured. With the and illustrate various objects and features thereof. pusher bar pushing or holding a spinal rod in seated rela- 20
tionship in the rod receiving channel of an implant, a cap BRIEF DESCRIPTION OF THE DRAWINGS
nwy be installed on the implant via access through the slot FIG. lis a front plan view of a spinal rod pusher assembly
in the pusher bar. Qj a S^]U^ r(Kj seat£ng apparatus of the present invention.
In another aspect of the present invention the pusher 25 nG 2 fe an ^ d afld fr ^ view of me her
assemMy includes a threaded stem rotatably connected to assembly m snown ^ mG j witn broken t0
the pusher bar along the upper cross member. A receptacle sflow interior detail
having a threaded bore extending therethrough is fixedly __ _ . ... , , „ „ ,
secured to the handle portion of the implant holder. The TMJ 3 ls a cross-sectional view taken along line 3-3 of threaded stem is removably securable within the threaded J0
bore of the receptacle for use in mechanical advancement of FIG- 4 is a front plan view of an implant holder of the
the pusher bar toward and away from an implant held by the spinal rod seating apparatus of the present invention,
implant holder by rotation of the threaded stem. FIG. 5 is an enlarged bottom plan view of the implant
A pair of guides, which define a pair of pusher bar holder as shown in FIG. 4 taken generally along line 5—5
receiving channels may also be secured to the implant holder 35 of FIG. 4.
such that at least portions of the opposed legs of the pusher FIG. 6 is an enlarged and fragmentary rear plan view of
bar may be extended therethrough to guide advancement of the implant holder taken generally along line 6—6 of FIG.
the pusher bar relative to the implant holder. 5.
In another aspect of the invention the implant holder FIG. 7 is a front plan view of the spinal rod seating
includes a structural member or web having a lower edge 40 apparatus of the present invention showing the pusher
extending transverse to the axis of the rod receiving channel assembly secured to the implant holder.
of an implant secured between the implant engaging mem- FIG. 8 is an enlarged and fragmentary view of the spinal
bers. An opening extends between the lower edge of the web rod ... apparatus as shown in FIG. 7 and showing the
and the head of an implant secured between the implant spinal rod seating apparatus positioned to drive a spinal rod
engaging members. The lower edge of the web is adapted to 45 mto a seated alignment with an open ended bone screw.
function as a fulcrum for the stem of a cap inserter which „„ „ . . ., . „„ „ . ... . .
.. _, ,.. . . . . . . „ FIG. 9 shows a view similar to FIG. 8 in which a spinal
must be advanced through an arcuate motion to install a cap , . . .. . . . .. . ...
.B .. ... . . ... f rod has been driven into a seated alignment with an open
on an implant. The distance that the lower edge of the web . ,. , .,
j , , . ««. • 1 * ended bone screw by the spinal rod seating apparatus,
is spaced from an implant secured between the implant J r e rr
engaging members is preferably selected to facilitate instal- 50 mG- 10 18 a ... front Plan Vlew of a saddle <*P lation of a cap utilizing the cap inserter. lnserter for use m association with the spinal rod seating
apparatus and with portions broken away to show interior OBJECTS AND ADVANTAGES OF THE detail.
INVENTION FIG. 11 is an exploded and fragmentary perspective view
The objects and advantages of the invention include: to 55 showing a saddle cap inserter positioned for installing a provide a set of tools for use in seating a spinal rod in a rod saddle ^P wttl a set screw secured thereto, onto the head of receiving channel in a head of an open ended spinal surgery an °Pen ended 00116 screw with a sP^al rod extending implant such as a bone screw, hook or transverse connector therebetween.
by relative translation of the rod and implant toward one FIG. 12 is a fragmentary, right side elevational view of the another; to provide such a set of tools which facilitates the 60 spinal rod seating apparatus as shown in FIG. 9 with a spinal installation of a cap onto the open ended spinal surgery rod seated in me head of an open ended bone screw and with implant while maintaining the spinal rod seated relative portions broken away to show the positioning of a saddle cap thereto; to provide such a set of tools comprising multiple inserter relative to the seating apparatus for installing the cap tools each adapted for a different use; to provide such a set on the bone screw with a spinal rod extending therebetween, of tools with different tools for use with different implants; 65 FIG. 13 is a fragmentary rear plan view of the spinal rod to provide such a set of tools wherein each tool comprises an seating apparatus as shown in FIG. 12 in which the cap implant holder for grasping holding or engaging an implant, inserter has been used to install the cap.