Abstract: In one embodiment, the present disclosure relates to an instrument adapted for use in an anterior to psoas spinal access procedure. The instrument includes a body, a first arm and a second arm. A first rod extends from the first arm at an angle thereto while a second rod extends from the second arm at an angle thereto. Each of the first rod and the second rod include a length with a first portion and a second portion, the first portion having a convex surface perimeter and the second portion having a perimeter different from the first portion and being convex in part. In some embodiments, a kit includes the instrument and a blade adapted for use in conjunction with the instrument in an anterior to psoas spinal access procedure.

Abstract: In one embodiment, a system (20, 30) includes a retractor (100, 100A, 1113) with a plurality of rods (120, 120A-1-124A-1, 180, 220, 320, 420, 1111A-E) that are cylindrical over part of their length, a light source (230, 330), and a fiber optic cable (229, 329), where at least one rod includes a body with an opening (122, 182, 222, 322) therein. The opening extends from an upper surface (122A, 181B, 222A, 322A) of the rod, through an interior of the rod, and then to a side surface (122B, 182D, 222B, 322B) of the rod located between ends of the rod. The opening is sized so that at least a single monofilament fiber optic cable is disposable therethrough. The system is adapted so that any number of rods may include a fiber optic cable disposed therein and so that the cable may be easily removed or inserted from the rod during use of the retractor.

Abstract: Disclosed herein are a spinal fixation assembly and method to provide adequate rigidity and support for a vertebral column without requiring additional pedicle screws and spinal rods. The spinal fixation assembly includes a spinal rod loop with multiple sides configured to be attached to a vertebral body with two or more pedicle screws. Each pedicle screw is adapted to fit at various locations along the spinal rod loop.

Abstract: In one embodiment, the present disclosure relates to an instrument adapted for use in an anterior to psoas spinal access procedure. The instrument includes a body, a first arm and a second arm. A first rod extends from the first arm at an angle thereto while a second rod extends from the second arm at an angle thereto. Each of the first rod and the second rod include a length with a first portion and a second portion, the first portion having a convex surface perimeter and the second portion having a perimeter different from the first portion and being convex in part. In some embodiments, a kit includes the instrument and a blade adapted for use in conjunction with the instrument in an anterior to psoas spinal access procedure.

Abstract: Disclosed herein are a spinal fixation assembly and method to provide adequate rigidity and support for a vertebral column without requiring additional pedicle screws and spinal rods. The spinal fixation assembly includes a spinal rod loop with multiple sides configured to be attached to a vertebral body with two or more pedicle screws. Each pedicle screw is adapted to fit at various locations along the spinal rod loop.

Abstract: A bone fastener includes a head, and a screw portion extends from the head. The screw portion includes a shaft and a thread extending along and about the shaft. The thread has a height extending from a root to a tip thereof. The thread also has first and second portions disposed between the root and the tip. The second portion has a porous structure configured to promote bone ingrowth and has a porosity greater than that of the first portion.

Abstract: A bone fastener includes a head, and a screw portion extends from the head. The screw portion includes a shaft and a thread extending along and about the shaft. The thread has a height extending from a root to a tip thereof. The thread also has first and second portions disposed between the root and the tip. The second portion has a porous structure configured to promote bone ingrowth and has a porosity greater than that of the first portion.

Abstract: A bone graft delivery system includes a bone graft injector and an access portal. The access portal may include a handle having a first arm pivotably connected to, and biased away from, a second arm. A ratchet including a pawl may extend from the second arm. A delivery tube may be configured to mate with the first arm and be configured to store a bone graft material therein. A plunger including a shaft and a plunger tip at the distal end thereof may be configured to move through the delivery tube. At least a portion of the shaft may include teeth, the pawl of the ratchet being configured to iteratively contact the teeth. A user may hold the access portal with a first hand and the bone graft injector with a second hand, iteratively squeezing the handle to iteratively eject amounts of bone graft material into a patient.

Abstract: In one embodiment, the present disclosure relates to a retractor apparatus that includes a retractor frame, five arms attached to the retractor frame and five rods each attached to one of the five arms. Each rod includes a convex surface facing a center of the retractor frame. At least two of the five rods are movable independently from one another. A first rod of the five rods includes a longitudinal axis and is translatable along the longitudinal axis. Further, the first rod is attached to a first arm of the five arms and is pivotable relative to the first arm. The axis of pivot is offset from the longitudinal axis through which the first rod translates.

Abstract: In one embodiment, the present disclosure relates to a retractor apparatus that includes a retractor frame, five arms attached to the retractor frame and five rods each attached to one of the five arms. Each rod includes a convex surface facing a center of the retractor frame. At least two of the five rods are movable independently from one another. A first rod of the five rods includes a longitudinal axis and is translatable along the longitudinal axis. Further, the first rod is attached to a first arm of the five arms and is pivotable relative to the first arm. The axis of pivot is offset from the longitudinal axis through which the first rod translates.

Abstract: In one embodiment, an expander set includes a first and second expander. The first expander includes an outer surface having a first engagement feature and a groove and the second expander includes an inside surface having a second engagement feature adapted to engage with the first engagement feature. The inside surface of the second expander is shaped to correspond to a portion of the outer surface of the first expander. Additionally, the groove on the outer surface of the first expander is sized and shaped to accommodate a rod of a retraction system such that when the first expander is advanced within the retraction system, the rod remains within the groove. When the first and second expanders are engaged with one another, they define an oblong cross-section.

Abstract: Disclosed herein is a surgical cutting guide, a surgical cutting guide assembly and a method for using same. The surgical cutting may have first and second slots defining first and second axes respectively. The surgical cutting guide may be positioned away from a vertebral body such that the first and second axes intersect at a distal point located in an interior of the vertebral body. The surgical cutting assembly may include the surgical cutting guide with first and second cutting instruments. A method of performing a pedicle subtraction osteotomy may include the steps of placing the surgical cutting guide over the first and second cutting instruments.

Abstract: Disclosed herein is a surgical cutting guide, a surgical cutting guide assembly and a method for using same. The surgical cutting may have first and second slots defining first and second axes respectively. The surgical cutting guide may be positioned away from a vertebral body such that the first and second axes intersect at a distal point located in an interior of the vertebral body. The surgical cutting assembly may include the surgical cutting guide with first and second cutting instruments. A method of performing a pedicle subtraction osteotomy may include the steps of placing the surgical cutting guide over the first and second cutting instruments.

Abstract: Disclosed herein are a spinal fixation assembly and method to provide adequate rigidity and support for a vertebral column without requiring additional pedicle screws and spinal rods. The spinal fixation assembly includes a spinal rod loop with multiple sides configured to be attached to a vertebral body with two or more pedicle screws. Each pedicle screw is adapted to fit at various locations along the spinal rod loop.

Abstract: A screwdriver for driving a screw in bone includes a first body configured to engage a tulip of the screw, a first central bore extending through the first body, a second body having a second central bore extending through the second body and an external surface having a spline member positioned at least partially within the cavity, an inner shaft configured to drive a screw into bone and being rotatably coupled with the second body, a spring-biased pawl engageable with the spline member of the second body, a collar rotatable relative to the first body and the second body and having a cammed inner surface, when the collar is rotated in a first direction about the first body, the cammed inner surface pushes the spring-biased pawl into engagement with the spline member to rotatably couple the first body and the second body.

Abstract: In one embodiment, a system (20, 30) includes a retractor (100, 100A, 1113) with a plurality of rods (120, 120A-1-124A-1, 180, 220, 320, 420, 1111A-E) that are cylindrical over part of their length, a light source (230, 330), and a fiber optic cable (229, 329), where at least one rod includes a body with an opening (122, 182, 222, 322) therein. The opening extends from an upper surface (122A, 181B, 222A, 322A) of the rod, through an interior of the rod, and then to a side surface (122B, 182D, 222B, 322B) of the rod located between ends of the rod. The opening is sized so that at least a single monofilament fiber optic cable is disposable therethrough. The system is adapted so that any number of rods may include a fiber optic cable disposed therein and so that the cable may be easily removed or inserted from the rod during use of the retractor.

Abstract: In one embodiment, a surgical rigid arm (100, 150, 200, 900) includes a first portion (102, 152, 202, 902), a second portion (103, 153, 203, 903) and a central portion (105, 154, 205, 906), where the central portion is extends between the first and second portions. A first end of the first portion and a second end of the second portion are each attached to a peripheral side (14) of a surgical bed (10, 30) such that the first portion and the second portion extend from the surgical bed in a first direction. The central portion extends substantially horizontally and is positioned over the surgical bed, the central portion being connected to the surgical instrument such that a load from the surgical instrument is distributed across the central portion to the first portion and second portion to provide rigid support for the surgical instrument.

Abstract: In one embodiment, an assembly includes a retractor (30, 730, 930) and at least one cylindrical rod (102, 402, 502, 702, 802, 902) attached to the retractor. The rod has a fixed length portion (108, 406, 508, 708, 808, 908) and a spring portion (104, 404, 504, 718, 832, 905). The spring portion of the rod has a longitudinal dimension that changes as a function of loading on the rod. When the rod is in contact with a solid surface such as a bone, it maintains contact with such surface even while changing shape due to loading on the rod. When the assembly includes multiple rods attached to the retractor, both spring-based rods and other types of rods may be used in combination.

Abstract: Disclosed herein are a spinal fixation assembly and method to provide adequate rigidity and support for a vertebral column without requiring additional pedicle screws and spinal rods. The spinal fixation assembly includes a spinal rod loop with multiple sides configured to be attached to a vertebral body with two or more pedicle screws. Each pedicle screw is adapted to fit at various locations along the spinal rod loop.

Abstract: A surgical instrument includes a cannulated body extending along an axis and having a first working end spaced along the axis from a second working end. The surgical instrument may be used with a fenestrated screw assembly, a delivery unit, and an alignment guide wire. The first working end of the surgical instrument is configured to transmit a force to a delivery unit in a direction about the axis and the second working end is configured to transmit a force to a delivery unit in a direction generally transverse to the axis. The first working end may be used to rotate the delivery unit to thereby removably attach the delivery unit to the fenestrated screw assembly. The surgical instrument may be repositioned to engage the second working end with the proximal end of the delivery unit to maintain the rotational position of the delivery unit.