Biomaterial delivery device, and related systems and methods

A system for delivering flowable biomaterial into an intervertebral disc space between an upper vertebral body and a lower vertebral body of a patient, the system comprising:

• a plurality of delivery bodies each configured for delivering the biomaterial, each of the plurality of delivery bodies defining:
• a proximal end, a distal end spaced from the proximal end along a longitudinal direction, a cannulation extending from the proximal end to at least one opening adjacent the distal end,
• a distal region including a tip that extends to the distal end, the distal region defining a maximum height at a location proximally spaced from the distal end, the maximum height measured along a second direction perpendicular to the longitudinal direction,
• wherein the maximum heights of at least some of the distal regions of the plurality of delivery bodies are different from one another, and the distal regions are configured to provide feedback indicating a distance between the upper and lower vertebral bodies along a cranial-caudal direction;
• a carrier that defines a channel elongate along the longitudinal direction, the carrier configured for insertion within the cannulation of any of the plurality of delivery bodies to carry the biomaterial within the cannulation;
• and
• an advancement member configured for insertion within the cannulation of any of the plurality of delivery bodies so as to forcibly advance the biomaterial from the cannulation, through the at least one opening, and into the interverbal disc space,
• wherein:
• the at least one opening of at least one of the plurality of delivery bodies is located at the distal end such that a central axis of the at least one of the delivery bodies extends through the at least one opening,
• at least one of the plurality of delivery bodies defines an interior surface that defines the cannulation, the interior surface defines helical threads extending along a distal portion of the cannulation that extends to the distal end,
• the advancement member defines a complimentary distal member portion that defines a pair of opposed surfaces that are substantially planar and spaced from each other along a direction perpendicular to a central axis of the at least one of the plurality of delivery bodies, and
• the at least one of the plurality of delivery bodies is rotatably connectable to the advancement member about the central axis, whereby the at least one delivery body and the advancement member are cooperatively configured such that rotation of the helical threads relative to the pair of opposed surfaces about the central axis advances the biomaterial distally through the cannulation and out the at least one opening and into the intervertebral disc space.