An assembly of devices designed to bore and excavate bones, teeth, and tough tissues during a dental surgical procedure. It typically consists of a motorized drill handpiece and/or motor, a control unit, and a variety of attachments used to hold the drilling/excavating endpieces (e.g., drill bits, burs, polishing disks). This system is electrically-powered from the mains (e.g., 230 or 115 volt) and supplies the handpiece/motor with low-voltage electricity (e.g., 24 volt) through a control unit. This is a reusable device.