Abstract: The present invention describes systems and methods to provide dynamically adjustable dental impression devices. In an exemplary embodiment, the present invention provides a dynamically adjustable dental impression device including a facial portion having at least a first wall and a lingual portion having at least a first wall. The facial portion is movably connected to the lingual portion to form an internal cavity enabled to receive a quantity of impression material. Furthermore, the size of the internal cavity can be reduced during the formation of an impression of a dental structure. In some embodiments, the facial portion can be contracted with the lingual portion during the formation on the impression of the dental structure, resulting in the reduction in the size of the internal cavity.

Abstract: A computer-controlled system is disclosed for dispensing selected packages from a vending machine. The system includes an ejector mechanism adapted to travel rectilinearly intermediate a pair of oppositely-mounted storage banks, each bank consisting of a plurality of vertically-oriented adjacent compartments in which distinct packages are stacked. The ejector mechanism includes a carriage mounted on a helical screw rotatably driven by a travel motor. An ejector lever pivotally connected to the carriage is mounted upon an actuator bar rotatably driven by a pivot motor for independently actuating one of a pair of overlapping ejector arms according to the directional rotation of the pivot motor. Each ejection arm is pivotally connected to the carriage and configured to discharge a single package from beneath a stack when actuated. A microprocessor controls the rotational drive of the motors and is provided feedback signals indicative of carriage location package availability by sensors attached to the carriage.