A system for augmenting a vertebral body, said system comprising: an access cannula comprising a cannula hub, and a cannula shaft extending from said cannula hub with said cannula shaft comprising a distal end positionable within the vertebral body and defining a lumen along a longitudinal axis; an introducer device comprising: an actuator configured to receive an input from a user; a shaft comprising a rigid proximal portion coupled to said actuator and defining a proximal end of said shaft, and a flexible distal portion, wherein said shaft comprises a distal end and a length of said shaft between said proximal end and said distal end is sufficient for said shaft to extend through and be operable beyond said distal end of said access cannula; and a pulling element coupled to said actuator and to said shaft at or near said distal end; and a flexible sheath at least partially overlying said shaft with said flexible sheath comprising a distal end positionable near said distal end of said shaft such that said flexible sheath is configured to extend through and be operable beyond said distal end of said access cannula, characterized in that said flexible distal portion of said shaft comprises a pre-set curve in an unconstrained state, said pulling element extends along at least a portion of said pre-set curve, wherein said actuator is configured to alter tension on said pulling element in response to a user input and, in response to tension on said pulling element being altered, said pulling element is configured to move said pre-set curve between said unconstrained state and a constrained state in which said flexible distal portion at least partially straightens, and wherein a distal portion of said flexible sheath is configured to conform to said flexible distal portion as said pre-set curve is moved between said constrained state and said unconstrained state, and wherein said introducer device is removable from said flexible sheath with said distal end of said flexible sheath configured to remain at the target site offset from said longitudinal axis. an access cannula comprising a cannula hub, and a cannula shaft extending from said cannula hub with said cannula shaft comprising a distal end positionable within the vertebral body and defining a lumen along a longitudinal axis; an introducer device comprising: an actuator configured to receive an input from a user; a shaft comprising a rigid proximal portion coupled to said actuator and defining a proximal end of said shaft, and a flexible distal portion, wherein said shaft comprises a distal end and a length of said shaft between said proximal end and said distal end is sufficient for said shaft to extend through and be operable beyond said distal end of said access cannula; and a pulling element coupled to said actuator and to said shaft at or near said distal end; and an actuator configured to receive an input from a user; a shaft comprising a rigid proximal portion coupled to said actuator and defining a proximal end of said shaft, and a flexible distal portion, wherein said shaft comprises a distal end and a length of said shaft between said proximal end and said distal end is sufficient for said shaft to extend through and be operable beyond said distal end of said access cannula; and a pulling element coupled to said actuator and to said shaft at or near said distal end; and a flexible sheath at least partially overlying said shaft with said flexible sheath comprising a distal end positionable near said distal end of said shaft such that said flexible sheath is configured to extend through and be operable beyond said distal end of said access cannula, characterized in that said flexible distal portion of said shaft comprises a pre-set curve in an unconstrained state, said pulling element extends along at least a portion of said pre-set curve, wherein said actuator is configured to alter tension on said pulling element in response to a user input and, in response to tension on said pulling element being altered, said pulling element is configured to move said pre-set curve between said unconstrained state and a constrained state in which said flexible distal portion at least partially straightens, and wherein a distal portion of said flexible sheath is configured to conform to said flexible distal portion as said pre-set curve is moved between said constrained state and said unconstrained state, and wherein said introducer device is removable from said flexible sheath with said distal end of said flexible sheath configured to remain at the target site offset from said longitudinal axis.