An expandable plate configured to expand and to hold, move and maintain a body part in a specific position as needed in orthopedic surgery. The expandable plate has a bed with a guide assembly formed in a top surface configured to fit to cavity assembly of a track so as to slide in relation thereto. A carriage unit can be positioned on the track to hold a body part in a specific position, whereby when an additional linear dimension is required for a surgical procedure, the track can be expanded to extend the body part to the predetermined position using the same positioner device.
