US 12,440,351 B2
Dual-shaft implant expansion driver with reversible driver key mechanism and expandable inter vertebral implant system
Brian Flint, Ft. Washington, PA (US); and Colm McLaughlin, Glenside, PA (US)
Assigned to Globus Medical Inc., Audubon, PA (US)
Filed by GLOBUS MEDICAL, INC., Audubon, PA (US)
Filed on Jul. 10, 2024, as Appl. No. 18/768,313.
Application 18/768,313 is a continuation of application No. 18/465,316, filed on Sep. 12, 2023, granted, now 12,048,638.
Application 18/465,316 is a continuation of application No. 17/740,961, filed on May 10, 2022, granted, now 11,752,013, issued on Sep. 12, 2023.
Application 17/740,961 is a continuation of application No. 16/868,747, filed on May 7, 2020, granted, now 11,344,434, issued on May 31, 2022.
Prior Publication US 2024/0366403 A1, Nov. 7, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 2/46 (2006.01); A61F 2/44 (2006.01)
CPC A61F 2/4611 (2013.01) [A61F 2/447 (2013.01); A61F 2/4657 (2013.01); A61F 2002/4658 (2013.01); A61F 2002/4668 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A surgical implant system comprising:
an expandable interbody fusion implant comprising an anterior end, a posterior end, a frame, an upper endplate and a lower endplate moveably coupled to the frame, an actuation screw, and an anterior actuator and a posterior actuator coupled to the frame and positioned coaxially between the upper endplate and the lower endplate, wherein the actuation screw extends through the anterior and posterior actuators from the anterior end of the implant, wherein rotation of the actuation screw and the anterior and posterior actuators causes the implant to expand to a parallel expansion configuration, an anterior expansion configuration, or a posterior expansion configuration; and
an implant expansion driver for engagement with and insertion of the expandable interbody fusion implant including:
a housing;
a first driver shaft having a proximal end rotatably disposed within the housing and a distal end extending out from a first side of the housing, the first driver shaft configured to engage the actuation screw of the implant;
a second driver shaft coaxially positioned around the first driver shaft and extending out from the first side of the housing, the second driver shaft configured to engage at least one of the anterior and posterior actuators of the implant, wherein the first and second driver shafts are configured to rotate independently to selectively expand the implant;
an idler driver shaft secured within the housing;
a gear coupling the idler driver shaft to the second driver shaft; and
a driver key configured to removably attach to the housing in a first orientation and a second orientation relative to the housing to selectively engage and rotate the first and second driver shafts so as to expand both the anterior and posterior ends of the implant together into the parallel expansion configuration or expand one of the anterior and posterior ends of the implant relative to the other end into the anterior or posterior expansion configuration.