Abstract: A disposable prophy angle with an accessible and replaceable internal collapsible prophylaxis cartridge and a push button and plunger/paddle combination to force a metered amount of prophylaxis medium into the prophy angle while providing audible and/or tactile feedback.

Abstract: A disposable prophy angle with an accessible and replaceable internal collapsible prophylaxis bladder and a push button and plunger/paddle combination to force a metered amount of prophylaxis medium into the prophy angle while providing audible and/or tactile feedback.

Abstract: There is provided a method for removing selenium from an aqueous influent, comprising: adding a water-soluble reducing agent to an aqueous influent containing an oxidized selenium compound (Sex, wherein x is the oxidation state and x>0); reducing said Sex using said reducing agent at a temperature; removing said Se0 from said aqueous influent using a sorbent or a technique selected from the group consisting of filtration, coagulation, flocculation, clarification and centrifugation.

Abstract: A disposable prophy angle with an accessible and replaceable internal collapsible prophylaxis bladder and a push button and plunger/paddle combination to force a metered amount of prophylaxis medium into the prophy angle while providing audible and/or tactile feedback.

Abstract: A system and method for dispensing prophylaxis paste during dental cleaning procedures which includes a flow control valve, which is actuated by pressure between the prophy cup and the tooth, and also includes a source of prophylaxis paste delivered under pressure.

Abstract: A system and method for dispensing prophylaxis paste during dental cleaning procedures which includes a flow control valve, which is actuated by pressure between the prophy cup and the tooth and also includes a source of prophylaxis paste delivered at a relatively constant pressure.

Abstract: The invention is a multiterminal data collection network including a plurality of terminals and a base station configured so that each data collection terminal can be programmed in accordance with one of a predetermined number of available application. When a data collection terminal such as a bar code reader is programmed to operate in accordance with a particular application, the reader operates according to a data collection protocol that is the same as the data collection protocol of each other reader in the network programmed to operate in accordance with that same application. In another aspect of the invention, a base station normally transmits messages received from different readers according to different transmission protocols if the readers are programmed to operate in accordance with different applications, and transmits messages received from different readers according to the same protocol if the readers are programmed in accordance with the same application.