Abstract: Medical devices for the treatment of spinal conditions are described herein. The medical device includes a main body that is adapted to be placed between the L5 vertebra and the sacrum so that the main body acts as a spacer with respect to the L5 vertebra and the sacrum to maintain distraction therebetween when the spine moves to extension.

Abstract: An instrument for performing a medical procedure includes a nozzle sized to fit through a cannula, and a plunger sized to be advanced through the nozzle and urge material through a distal tip of the nozzle. The plunger includes an interior lumen and a distal tip having a side port, such that after material delivery from the nozzle, the distal tip of the plunger can be extended beyond the distal tip of the nozzle, and additional material delivery can be performed via the side port of the plunger. This dual action material delivery capability can beneficially enhance material placement at the target location, and can also enable delivery of different materials to the target location without having to exchange delivery tools.