Abstract: A powered dental tool dispenses a liquid dentifrice from a removable and replaceable cartridge to a dental site being cleaned or otherwise treated. The tool mounts the cartridge to receive a supply of the dispensable liquid, and accommodates the removal and replacement of a spent cartridge. A removable and replaceable cartridge for supplying dispensable liquid to a dental tool is initially sealed, is readily installed in the tool with a connection to a dispensing tube, and is collapsible for emptying it. A multiple-treatment dental care system has a single power handle that operates interchangeable with a fluid dispensing spray implement, with a rotary treatment implement, and with a revolving-bristle brush implement. In addition to dispensing fluid with the spray implement, the system can dispense liquid material to the dental site being treated by way of the rotary implement and by way of the revolving brush implement.

Abstract: A manually deployable power tool for dental treatment and other uses drives an output shaft with continuous rotary motion, combined with selected axial reciprocation of adjustable stroke length. The drive mechanism for imparting this combined motion to the output shaft has a single rotary input drive coupled with an adjustable cam mechanism. The cam mechanism produces the reciprocating motion in response to the driven rotation of the output shaft. The tool drive mechanism has a high degree of axial symmetry, and is arranged to facilitate the delivery of liquid material to the output, tool-carrying end of the output shaft.

Abstract: A dental hygiene (10) has a housing (12) that provides a manually deployable handle for the device and that houses a motor (14) that drives both a brush agitating drive mechanism (16) and a liquid dispensing pump mechanism (18). The housing (12) has a tool mount (20) that interchangably mounts in operable relation with the drive mechanism and with the pump mechanism any one of a dental brush tool (22) and a dental spray tool (24). The brush tool and the drive mechanism preferably are arranged to agitatingly drive two sets of brush elements (26) and (28) oppositely, preferably with back and forth rotation of individual brush tufts.