Abstract: A dose-reducing x-ray aiming device includes an aiming ring having shield with an aperture, at least one arm, and at least one sensor holder. The dose-reducing x-ray aiming ring is generally used to aim a dental x-ray machine and at least partially shield some of the x-rays emitted from the x-ray machine while capturing radiographs. X-rays generally pass through the aperture and then interact with a sensor for capturing the radiographs after passing through the tissue of a patient. In one embodiment, the x-ray aiming device provides an all-in-one aiming ring, which allows a user to capture both periapical and bitewing radiographs with a single device. The aiming device also includes an annular ridge or lip which helps align the x-ray machine with the aiming device.

Abstract: A mixing device is disclosed for gently agitating the contents of one or more closed containers. The device includes a plurality of cylindrical rollers parallelly juxtaposed and adapted to rotate in an eccentric fashion about respective longitudinal axes that are parallel to each other and inclined to the respective cylindrical axes of the rollers. A drive bar coupling interconnects the rollers and a drive motor so that the rollers rotate in the same direction and at the same speed thereby imparting a simultaneous rocking and rolling motion to the containers when placed in supporting contact with adjacent rollers.