Abstract: A disposable dental tray including a unitary member formed of a flexible foam material defining a pair of hinged U-shaped tray portions configured to fit over the upper and lower teeth of the mouth and wherein each tray portion is defined by a base wall, a pair of end walls and inner and outer side walls. A first one of the tray portions is provided with a handle that extends outwardly from the tray portion, the handle including a main portion and an end portion. The second one of the tray portions is provided with a handle that extends outwardly from the tray portion, the handle including a through slot adapted to receive and securely retain the end portion of the other handle.

Abstract: The invention relates to a method for bleaching and cleaning teeth for whitening purposes that involves the substantially simultaneous mixing of peroxide and an abrasive cleaning agent and application of the mixture to a patient's teeth, and burnishing the mixture onto the enamel of the teeth.

Abstract: The invention relates to a method for bleaching and cleaning teeth for whitening purposes that involves the substantially simultaneous mixing of peroxide and an abrasive cleaning agent and application of the mixture to a patient's teeth, and burnishing the mixture onto the enamel of the teeth.

Abstract: The invention is directed to a combination of a baseball cap, a sound generator and a three dimensional image of an object having a distinctive sound. A lower case is fastened to the baseball hat with snap fasteners and an upper case is formed in the shape of the image being recorded and played by the sound generator. The application discusses examples of attachments to the cap consisting of an auto scoop, a three barrel carburetor, a boat and a helicopter.

Abstract: A dental impression tray includes a tray portion anatomically contoured to fit over at least a part of a patient's upper and/or lower dentition of which an impression is to be obtained. The tray portion is loaded with impression material and situated opposite to the desired dentition part whereupon the patient bites into the soft impression material to form an impression of the dentition in the material. The tray portion is defined by at least one wall on which a plurality of vertically extending adjacent ribs are integrally formed defining a plurality of channels therebetween into which the impression material flows. The ribs have a dovetail cross-section so that the channels narrow or converge in the inward direction, i.e. towards the interior of the tray portion, to prevent the impression material from separating from the side wall in the inward direction as well as spreading laterally as and after the impression is taken to thereby provide a precise impression of the dentition.