A mechanical device with adjustable parts intended to be placed between the teeth of the upper and lower jaws of a patient to maintain an open oral cavity, typically during emergent placement of an artificial airway or for an oral/dental surgical intervention. Also known as a jaw spreader, it is available in various designs having support structures that force and/or hold the jaws apart; e.g., it may be designed with flat, pivoted blades that angle outward when adjusted; or it may have two parallel plates that move apart with adjustments to a centre screw; or it may have a scissors-like design with pivoted, self-retaining, notched blades at the distal end. This is a reusable device.