In an illustrative embodiment, a motor-driven orthopedic impacting tool fororthopedic impacting in the hips, knees,shoulders and the like may be capable of holding a surgical implement such asa broach, chisel, or other end effector, which whengently tapped in a cavity with controlled percussive impacts, can expand thesize or volume of an opening of the cavity or facilitateremoval of the surgical implement from the opening. A stored-energy drivemechanism may store potential energy and then release itto launch a launched mass or striker to communicate a striking force to anadapter in either a forward or reverse direction. The toolmay further include a combination anvil and adapter and an energy adjustmentmechanism to adjust the striking force the launchedmass delivers to the adapter.
