A system for injecting an incompressible low viscosity fluid into a bone cement reservoir adapted to be engaged with a cannula through which a high viscosity bone cement is transferred from the bone cement reservoir to a bone element is provided. The system comprises a control handle having a cylindrical body, a grip portion at an outer end of the cylindrical body and a central thumb-actuated plunger of a power piston, the grip portion being configured for receiving at least two fingers a user such as to permit actuation of the control handle by the single hand of the user, the cylindrical body including the power piston and a low viscosity fluid reservoir concentrically disposed relative to each other, the low viscosity fluid reservoir containing the incompressible low viscosity fluid and the power piston extending longitudinally through a center of the low viscosity fluid reservoir.
