Abstract: A pair of dentures is prefabricated and placed in a patient's mouth with upper and lower dentures held together in horizontal positions (relative to each other) which conforms to the natural position of the patient's jaw. There, a suitable plastic is set in the denture base to build an anatomical base conforming to the patient's alveolar ridges. The invention encompasses both the equipment and process for properly holding the upper and lower dentures while in the patient's mouth. In one embodiment, a between the dentures positioning device clamps the dentures together in the relative positions of the jaws. In another embodiment, a pair of gear-like racks or tools are attached to the sides of the dentures enabling the proper jaw positioning.