Abstract: A dental tray having a body, at least two finger rest beams and a handle. The body has a predetermined shape and a plurality of body openings. The predetermined shape of the body accommodates the anatomical shape of the patient's mouth and receives the entire jaw and gingiva areas. The plurality of body openings positioned in the body to allow the impression materials to vent through the body openings to obtain the impression and to retain the impression materials onto the body. The handle is received on the body and has a predetermined configuration to facilitate ease of use and elimination of lip pressure. Each finger rest beams are received longitudinally on the bottom of the body. The combination of the handle and each finger rest beams are ergonomically designed to allow optimal stabilization pressure be exerted by the operator to the dental tray and impression material.

Abstract: The device selectively separates and removes larger sized objects from a mixture of larger and smaller sized objects, such as soiled litter and animal waste from surrounding clean litter. The device has a rotating chamber which contains the mixture of larger and smaller sized objects with an opening for entry into and out of the chamber, and for expulsion of separated larger sized objects out of the chamber. A separating element, which is disposed longitudinally on the interior of the chamber, is passed through the mixture of larger and smaller sized objects to separate the larger sized objects from the smaller sized objects during the rotation of the chamber. As the chamber rotates, the separated larger sized objects, such as soiled litter and animal waste, are transferred from the separating element to a pivotable ramp in the interior of the chamber.