Abstract: A modular head polyaxial pedicle screw assembly has a pedicle bone screw, a tulip, a split locking ring and a saddle. The screw has a head and a threaded shank. The split locking ring has a split ring body with one or more positioning tabs extending from a first surface of the split ring body. The split ring locking ring is configured to be placed internal of the tulip positioned in a recess, groove or undercut of an inner surface of the tulip. Upon assembly of the pedicle screw into the tulip, at least a maximum diameter of the head is positioned above the recess, groove or undercut allowing the split locking ring to be inserted into the recess or groove thereby securing the pedicle screw inside the tulip wherein the head of the pedicle screw abuts the one or more positioning tabs.

Abstract: An expandable interbody fusion implant device has a frame, two ramp assemblies, a threaded drive shaft and at least one base plate, preferably two. The frame has a first lateral side and a second lateral side and a distal end and a proximal end. Each ramp assembly has a translating ramp with a threaded opening, a first pivoting hinged ramp and a second pivoting hinged ramp. Each base plate is hinged to a first lateral side of the frame. Each base plate is hinged to the distal ramp assembly and the proximal ramp assembly at an end of one of said pivoting hinged ramps of each ramp assembly. The drive shaft has a distal drive shaft component having threads for translating the distal ramp assembly and a proximal drive shaft component having threads for translating the proximal ramp assembly.

Abstract: An expandable interbody fusion implant device has a frame, two ramp assemblies, a threaded drive shaft and at least one base plate, preferably two. The frame has a first lateral side and a second lateral side and a distal end and a proximal end. Each ramp assembly has a translating ramp with a threaded opening, a first pivoting hinged ramp and a second pivoting hinged ramp. Each base plate is hinged to a first lateral side of the frame. Each base plate is hinged to the distal ramp assembly and the proximal ramp assembly at an end of one of said pivoting hinged ramps of each ramp assembly. The drive shaft has a distal drive shaft component having threads for translating the distal ramp assembly and a proximal drive shaft component having threads for translating the proximal ramp assembly.

Abstract: An expandable interbody fusion implant device has a frame, two ramp assemblies and two overlying base plates driven by two independent drive shafts. The two ramp assemblies include a distal ramp assembly and a proximal ramp assembly. Each ramp assembly has a translating ramp, a first pivoting hinged ramp and a second pivoting hinged ramp. The two overlying base plates include a first base plate overlying a second base plate. Each base plate is hinged to the distal ramp assembly and the proximal ramp assembly at an end of one of said pivoting hinged ramps of each ramp assembly. The two independently driven drive shafts include a first drive shaft for translating the distal ramp assembly and a second drive shaft for translating the proximal ramp assembly to independently expand the implant proximally or distally or both.

Abstract: An expandable interbody fusion implant device has a frame, two ramp assemblies and two overlying base plates driven by two independent drive shafts. The two ramp assemblies include a distal ramp assembly and a proximal ramp assembly. Each ramp assembly has a translating ramp, a first pivoting hinged ramp and a second pivoting hinged ramp. The two overlying base plates include a first base plate overlying a second base plate. Each base plate is hinged to the distal ramp assembly and the proximal ramp assembly at an end of one of said pivoting hinged ramps of each ramp assembly. The two independently driven drive shafts include a first drive shaft for translating the distal ramp assembly and a second drive shaft for translating the proximal ramp assembly to independently expand the implant proximally or distally or both.

Abstract: An expandable interbody fusion implant device has a frame, two ramp assemblies and two overlying base plates driven by two independent drive shafts. The two ramp assemblies include a distal ramp assembly and a proximal ramp assembly. Each ramp assembly has a translating ramp, a first pivoting hinged ramp and a second pivoting hinged ramp. The two overlying base plates include a first base plate overlying a second base plate. Each base plate is hinged to the distal ramp assembly and the proximal ramp assembly at an end of one of said pivoting hinged ramps of each ramp assembly. The two independently driven drive shafts include a first drive shaft for translating the distal ramp assembly and a second drive shaft for translating the proximal ramp assembly to independently expand the implant proximally or distally or both.

Abstract: An expandable interbody fusion implant device has a frame, two ramp assemblies, a threaded drive shaft and at least one base plate, preferably two. The frame has a first lateral side and a second lateral side and a distal end and a proximal end. Each ramp assembly has a translating ramp with a threaded opening, a first pivoting hinged ramp and a second pivoting hinged ramp. Each base plate is hinged to a first lateral side of the frame. Each base plate is hinged to the distal ramp assembly and the proximal ramp assembly at an end of one of said pivoting hinged ramps of each ramp assembly. The drive shaft has a distal drive shaft component having threads for translating the distal ramp assembly and a proximal drive shaft component having threads for translating the proximal ramp assembly.

Abstract: An expandable interbody fusion implant device has a frame, two ramp assemblies, a threaded drive shaft and at least one base plate, preferably two. The frame has a first lateral side and a second lateral side and a distal end and a proximal end. Each ramp assembly has a translating ramp with a threaded opening, a first pivoting hinged ramp and a second pivoting hinged ramp. Each base plate is hinged to a first lateral side of the frame. Each base plate is hinged to the distal ramp assembly and the proximal ramp assembly at an end of one of said pivoting hinged ramps of each ramp assembly. The drive shaft has a distal drive shaft component having threads for translating the distal ramp assembly and a proximal drive shaft component having threads for translating the proximal ramp assembly.

Abstract: An expandable interbody fusion implant device has a frame, two ramp assemblies, a threaded drive shaft and at least one base plate, preferably two. The frame has a first lateral side and a second lateral side and a distal end and a proximal end. Each ramp assembly has a translating ramp with a threaded opening, a first pivoting hinged ramp and a second pivoting hinged ramp. Each base plate is hinged to a first lateral side of the frame. Each base plate is hinged to the distal ramp assembly and the proximal ramp assembly at an end of one of said pivoting hinged ramps of each ramp assembly. The drive shaft has a distal drive shaft component having threads for translating the distal ramp assembly and a proximal drive shaft component having threads for translating the proximal ramp assembly.

Abstract: An expandable interbody fusion implant device has a frame, two ramp assemblies and two overlying base plates driven by two independent drive shafts. The two ramp assemblies include a distal ramp assembly and a proximal ramp assembly. Each ramp assembly has a translating ramp, a first pivoting hinged ramp and a second pivoting hinged ramp. The two overlying base plates include a first base plate overlying a second base plate. Each base plate is hinged to the distal ramp assembly and the proximal ramp assembly at an end of one of said pivoting hinged ramps of each ramp assembly. The two independently driven drive shafts include a first drive shaft for translating the distal ramp assembly and a second drive shaft for translating the proximal ramp assembly to independently expand the implant proximally or distally or both.

Abstract: An expandable interbody fusion implant device has a frame, two ramp assemblies and two overlying base plates driven by two independent drive shafts. The two ramp assemblies include a distal ramp assembly and a proximal ramp assembly. Each ramp assembly has a translating ramp, a first pivoting hinged ramp and a second pivoting hinged ramp. The two overlying base plates include a first base plate overlying a second base plate. Each base plate is hinged to the distal ramp assembly and the proximal ramp assembly at an end of one of said pivoting hinged ramps of each ramp assembly. The two independently driven drive shafts include a first drive shaft for translating the distal ramp assembly and a second drive shaft for translating the proximal ramp assembly to independently expand the implant proximally or distally or both.

Abstract: An expandable interbody fusion implant device has a frame, two ramp assemblies, a threaded drive shaft and at least one base plate, preferably two. The frame has a first lateral side and a second lateral side and a distal end and a proximal end. Each ramp assembly has a translating ramp with a threaded opening, a first pivoting hinged ramp and a second pivoting hinged ramp. Each base plate is hinged to a first lateral side of the frame. Each base plate is hinged to the distal ramp assembly and the proximal ramp assembly at an end of one of said pivoting hinged ramps of each ramp assembly. The drive shaft has a distal drive shaft component having threads for translating the distal ramp assembly and a proximal drive shaft component having threads for translating the proximal ramp assembly.

Abstract: An expandable interbody fusion implant device has a frame, two ramp assemblies and two overlying base plates driven by two independent drive shafts. The two ramp assemblies include a distal ramp assembly and a proximal ramp assembly. Each ramp assembly has a translating ramp, a first pivoting hinged ramp and a second pivoting hinged ramp. The two overlying base plates include a first base plate overlying a second base plate. Each base plate is hinged to the distal ramp assembly and the proximal ramp assembly at an end of one of said pivoting hinged ramps of each ramp assembly. The two independently driven drive shafts include a first drive shaft for translating the distal ramp assembly and a second drive shaft for translating the proximal ramp assembly to independently expand the implant proximally or distally or both.