An injection or aspiration apparatus (100,1500,1700) comprising: a body defining a cavity for receiving a fluid, the body having a first opening providing communication between with the cavity and an exterior of the body; a plunger structure movable within the cavity, the plunger structure adapted to be displaced within the cavity to displace an amount of the material within the cavity; a lead screw comprising: a first portion coupled to the plunger structure; and a longitudinal axis; a cam device coupled to the lead screw, the cam device comprising a plurality of cams (142,146); at least one engaging member adapted to engage the plurality of cams; and an actuator coupled to the at least one engaging member, the actuator operable to oscillate the at least one engaging member to alternately engage the plurality of cams so as to rotate the cam device in a single direction, characterized in that the injection or aspiration apparatus further comprises an advancement component (128, 1528), the advancement component comprising a first engaging feature, wherein the lead screw (112, 1512) comprises a second engaging feature, and wherein the first engaging feature and the second engaging feature matingly engage to cause the lead screw to translate longitudinally along the longitudinal axis within a passage formed within the cam device when the lead screw is rotated, and wherein the lead screw is rotationally fixed within the cam device. a body defining a cavity for receiving a fluid, the body having a first opening providing communication between with the cavity and an exterior of the body; a plunger structure movable within the cavity, the plunger structure adapted to be displaced within the cavity to displace an amount of the material within the cavity; a lead screw comprising: a first portion coupled to the plunger structure; and a longitudinal axis; a cam device coupled to the lead screw, the cam device comprising a plurality of cams (142,146); at least one engaging member adapted to engage the plurality of cams; and an actuator coupled to the at least one engaging member, the actuator operable to oscillate the at least one engaging member to alternately engage the plurality of cams so as to rotate the cam device in a single direction, characterized in that the injection or aspiration apparatus further comprises an advancement component (128, 1528), the advancement component comprising a first engaging feature, wherein the lead screw (112, 1512) comprises a second engaging feature, and wherein the first engaging feature and the second engaging feature matingly engage to cause the lead screw to translate longitudinally along the longitudinal axis within a passage formed within the cam device when the lead screw is rotated, and wherein the lead screw is rotationally fixed within the cam device. a first portion coupled to the plunger structure; and a longitudinal axis; a cam device coupled to the lead screw, the cam device comprising a plurality of cams (142,146); at least one engaging member adapted to engage the plurality of cams; and an actuator coupled to the at least one engaging member, the actuator operable to oscillate the at least one engaging member to alternately engage the plurality of cams so as to rotate the cam device in a single direction, characterized in that the injection or aspiration apparatus further comprises an advancement component (128, 1528), the advancement component comprising a first engaging feature, wherein the lead screw (112, 1512) comprises a second engaging feature, and wherein the first engaging feature and the second engaging feature matingly engage to cause the lead screw to translate longitudinally along the longitudinal axis within a passage formed within the cam device when the lead screw is rotated, and wherein the lead screw is rotationally fixed within the cam device.