Hammill Medical LLC

Ortho Inventions, LLC

Ortho Innovations, LLC

Greg Lentner

John E Hammill, Sr

An adjustable trial for spinal implant sizing. The trial has a first and second plate that is adjustable between zero and degrees by use of continuously sloped edges that interface with a positioning band having reciprocal sloped edges. Protrusions are attached to each plate and the positioning band, the rotation of which is used to change the angle of the plates. A tool used to rotate the protrusions is marked with the angle of movement.

Adjustable trial for sizing a spinal implant

A low profile rod-to-rod cross-connector formed from an outer bar member having a first end forming a receptacle and a second end available for coupling to a first spinal rod. An inner bar having a unidirectional insertion end is slidably insertable into the receptacle, and a second end is available for coupling to a second spinal rod; the insertion end having a centrally disposed slot bifurcating the insertion end. A locking member is positioned in the centrally disposed slot, wherein placement of the locking member in the first position permits movement of the insertion end within the receptacle, and placement of the locking member in the second position results in splaying the left arm and right arm to frictionally engage an inner sidewall of the receptacle.

Low profile rod-to-rod coupler

A bottom loading fastening system that consists of the polyaxial ball and socket joint used in conjunction with an anchoring bone screw. The system allows attachment of a connector assembly to the anchoring bone screw having a spherical ball connector using a locking ring positioned in a locking ring slot. Upon installation, the locking ring is moved to a ring containment slot to expand a retainer ring, allowing passage of a bone screw spherical ball, the retainer ring forcing the locking ring back to the locking ring slot, thereby permanently attaching the connector assembly to the anchoring bone screw. Movement of the locking ring from the ring containment slot provides an audible sound and tactile indication that the locking ring has secured the connector assembly to the bone screw.

Polyaxial ball and socket fastener with ring containment

A dual-lead thread drive screw system for a lateral expanding coaxial spinal implant. The system consists of a centrally located drive screw with lateral actuators. The actuators contain pins positioned through angular slots located on sidewalls attached to endplates. The angular slots provide angular positioning when the actuator pins translate through them. A carriage contains a drive screw for operating of the actuators. Alignment pins provided on each endplate allow the endplates rotate laterally relative to the carriage. An adjustment nut is axially retained by the carriage, but allowed to rotate. To expand/contract the endplates, the drive screw and adjustment nut are rotated together, with no relative motion between them. To change the angle of the endplates, the drive screw is rotated.

Dual-lead thread drive screw for a lateral expanding coaxial spinal implant

An opposing taper coaxial spinal implant. The system consists of a centrally located drive screw with opposing lead threads and actuators. The actuators contain pins positioned through angular slots located on sidewalls attached to end plates. The angular slots are opposing to create a wedge effect when the actuator pins translate through them. A carriage contains a drive screw and centrally located pin. The centrally located pin provides axis to contain each end plate, allowing them to pivot and translate relative to the carriage. An adjustment nut is axially retained by the carriage, but allowed to rotate. To expand/contract the end plates, the drive screw and adjustment nut are rotated together, with no relative motion between them. To change the angle of the end plates, the adjustment nut is rotated while keeping the drive screw rotation fixed.

Spinal implant with opposing taper coaxial drive system

A lateral expanding coaxial spinal implant. The system consists of a centrally located drive screw with lateral actuators. The actuators contain pins positioned through angular slots located on sidewalls attached to endplates. The angular slots provide angular positioning when the actuator pins translate through them. A carriage contains a drive screw for operating of the actuators. Alignment pins provided on each endplate allow the endplates to rotate laterally relative to the carriage. An adjustment nut is axially retained by the carriage, but allowed to rotate. To expand/contract the endplates, the drive screw and adjustment nut are rotated together, with no relative motion between them. To change the angle of the endplates, the drive screw is rotated.

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Maumee, OH, United States of America

Greg Lentner