Abstract: A surgical impaction apparatus. The surgical impaction apparatus includes a surgical hammer (10). The surgical hammer has a handle. The surgical hammer also has an impaction head (2) having an impaction axis (7) and a striking face (20). The striking face is substantially perpendicular to the impaction axis. The surgical hammer further has an inertial measurement unit (30), which is operable to measure a direction in which an impaction force is applied by the impaction head relative to the impaction axis. A method of providing feedback to a surgeon about an impaction force applied by an impaction head of a surgical hammer. The method includes striking an object with a striking face of the impaction head. The method also includes measuring a direction in which an impaction force was applied by the impaction head relative to an impaction axis of the impaction head. The striking face is substantially perpendicular to the impaction axis.