Abstract: A dental device includes a removable dental restoration device having at least one sector positionable adjacent an opening of a salivary gland of a human wearer. At least one chamber is provided for storing a material for administration. The chamber has a permeable wall disposed near the sector. The dental device has a tube having one end connected in fluid communication with the chamber and an opening therethrough at a predetermined position in spaced relation from the one end. Shutters are provided to effect a shutting and an opening of the permeable wall and the tube opening. The permeability of the wall permits saliva to enter the chambers to dissolve the administration material, and the concentration gradient in the tube results in a gradual diffusion of the solution into the mouth.

Abstract: The intraoral diffusion type administration device of the present invention is incorporated in a dental restoration, such as a complete denture, a partial plate denture, and a mouthpiece, and comprises: chambers for storing an administration material, permeable walls provided at said chambers, tubes having one ends connected to said chambers and having openings at predetermined positions, and shuttering means provided at said walls and at said openings of said tubes, said shuttering means open when in use, or not in eating and drinking, and close when not in use, or in eating and drinking. The permeability of the walls permits saliva to enter the chambers to dissolve the administration material, and the concentration gradient in the tube results in gradual diffusion of the solution into a mouth.

Abstract: Improved dental stock trays capable of taking a precise impression without an individual tray are disclosed. The improved trays are made by newly adding several features to conventional stock trays. For a dentulous maxilla, the improved maxillary tray comprises the added features: a small through hole at the front and central position in a side wall, a projecting plate at the convex and central position in a base, projections at the rear edge positions in the base, and protuberances at the rear end positions in an outer surface of the side wall. The hole, plate, projections and protuberances are in the neighborhoods facing an incisive papilla (or a median frenum), a median palatine raphe (or a palatine foveola), a hamular notch and a maxillary tuberosity, respectively, when the tray is inserted in a mouth.