A pneumatic surgical instrument, comprising: a striker, which is disposed within a longitudinal striker sleeve of the instrument; a removable probe mountable on a distal end of the instrument; a pressure regulator operably connectable to a gas cartridge mountable on or in the instrument, and a trigger mechanism comprising a trigger the trigger mechanism being operably connected to the pressure regulator and to the striker; wherein the probe has a distal end configured and shaped to engage: (a) at least a portion of a surface of an orthopedic implant, (b) a device configured to be placed between the orthopedic implant and the distal end of the probe, or (c) an orthopedic implant impactor configured to receive the distal end of the probe therein or thereon, the impactor being configured and shaped to engage at least a portion of the surface of the orthopedic implant, and wherein the pressure regulator is configured to direct and regulate the pressure of gas originating in the cartridge to the trigger mechanism, and wherein the instrument is configured so that a predetermined volume of gas stored at a predetermined range of pressures contained in the trigger mechanism is released to force the striker towards the distal end of the instrument when the trigger mechanism is actuated by a user, thereby delivering a shock wave to the proximal end of the probe, the shockwave delivered to the probe being substantially repeatable by the instrument when the trigger is actuated again by the user. a striker, which is disposed within a longitudinal striker sleeve of the instrument; a removable probe mountable on a distal end of the instrument; a pressure regulator operably connectable to a gas cartridge mountable on or in the instrument, and a trigger mechanism comprising a trigger the trigger mechanism being operably connected to the pressure regulator and to the striker; wherein the probe has a distal end configured and shaped to engage: (a) at least a portion of a surface of an orthopedic implant, (b) a device configured to be placed between the orthopedic implant and the distal end of the probe, or (c) an orthopedic implant impactor configured to receive the distal end of the probe therein or thereon, the impactor being configured and shaped to engage at least a portion of the surface of the orthopedic implant, (a) at least a portion of a surface of an orthopedic implant, (b) a device configured to be placed between the orthopedic implant and the distal end of the probe, or (c) an orthopedic implant impactor configured to receive the distal end of the probe therein or thereon, the impactor being configured and shaped to engage at least a portion of the surface of the orthopedic implant, and wherein the pressure regulator is configured to direct and regulate the pressure of gas originating in the cartridge to the trigger mechanism, and wherein the instrument is configured so that a predetermined volume of gas stored at a predetermined range of pressures contained in the trigger mechanism is released to force the striker towards the distal end of the instrument when the trigger mechanism is actuated by a user, thereby delivering a shock wave to the proximal end of the probe, the shockwave delivered to the probe being substantially repeatable by the instrument when the trigger is actuated again by the user.