Abstract: A system and method to facilitate bone grafting, the system including a rasp configured to prepare the grafting surfaces of a recipient, a sizer configured to determine the dimensions of a graft for abutment with the grafting surfaces, a cutting guide configured to receive bone stock and to facilitate producing the graft in proportion to the sizer, a measuring pan configured to determine the amount of grafting substance required to fill the void in the graft, and a holding device configured to stabilize the graft as the grafting substance is placed in the graft.

Abstract: A handle carries a dry cell battery which supplies current to a microprocessor which receives signals from a sensor on the end of a bill carried by a staff which projects from the handle. The signal to the microprocessor is converted to a display on the handle. The display has alarms to indicate when the retractor applies too much force to a spinal cord or when the force has been applied for too long a time.