Devices and methods for treating bone tissue

A device for injecting material into a body, comprising:

• a housing having proximal and distal end portions;
• a deployment cannula having a proximal end portion, a distal end portion and a lumen extending from an opening in the proximal end portion of the deployment cannula to an opening in the distal end portion of the deployment cannula, the proximal end portion of the deployment cannula being operatively connected to the distal end portion of the housing, and the distal end portion of the deployment cannula being configured for insertion into the body;
• a rotary drive member having a proximal end portion and a distal end portion, the rotary drive member extending through a proximal end opening in the housing wherein rotational movement of the drive member relative to the housing results in distal linear movement of the drive member;
• and
• an elongated injection member for injecting material into the body, the elongated injection member being disposed and moveable within the lumen of the deployment cannula, the elongated injection member having a proximal end portion, a distal end portion and a lumen extending between an opening in the proximal end portion of the elongated injection member and an opening in the distal end portion of the elongated injection member, the proximal end portion of the elongated injection member being operatively connected to the rotary drive member such that distal linear movement of the drive member advances the elongated injection member distally through the lumen of deployment cannula to extend the distal end portion of the elongated injection member out of the distal end portion opening of the deployment cannula.