A powder jet device (10) for dispensing a dental material comprises a nozzle head (12) comprising a discharge nozzle. The powder jet device (10) further comprises a housing (14) comprising a valve portion (28), which is connected to the nozzle head (12) and is adapted to receive a valve member (16), and a chamber portion (30) comprising at least a first chamber (32) for storing a powder material. The chamber portion (30) comprises a proximal end (34) located adjacent the valve portion (28), a distal end (36) located away from the valve portion (28) and a fluid channel (38) extending from the distal end (36) substantially to the proximal end (34) into the chamber. The powder jet device (10) further comprises a valve member (16) disposed within the valve portion (28). The valve member (16) comprises a fluid supply passage (54) and is movable between a first position, in which a first fluid path (64) for delivery of a fluid from the fluid supply passage (54) into the chamber via the fluid channel (38) so as to create a dispersion from the powder material and a second fluid path (66) for delivery of the dispersion to the discharge nozzle are open, and a second position, in which at least the first fluid path (64) is closed.

A powder delivery nozzle (12) for a personal care appliance (10) comprises a body (28), guidance tip (38), powder chamber (50), and flexible membrane (56). The body (28) includes an air-liquid channel (30) for delivery of air and/or liquid from a proximal end to a distal end thereof. The guidance tip (38), located at the distal end of the body (28), includes an orifice (40) coupled to the air-liquid channel (30) and is configured to expel a pulse of air and/or liquid. The powder chamber (50) is configured for storing a powder (52) and having an air intake port (42) and a powder outlet port (44). The flexible membrane (56) is disposed between the powder chamber (50) and the air-liquid channel (30). Responsive to delivery of a pulse of air and/or liquid via the air-liquid channel (30), a pulse of pressure is applied to the flexible membrane (56) for actuating a release of powder expelled from the powder chamber (50) via the powder outlet port (44). A method and personal care appliance are also disclosed.

A composition delivery source (300) includes a chamber (302), a solid-liquid composition delivery tube (314), a mixing tube (316), and a liquid-supply tube (318). A filter (304) divides the chamber (302) into a liquid compartment (306) and a solid-liquid composition compartment (308). The solid-liquid composition delivery tube (314) is in fluid communication with the solid-liquid composition compartment (308). The mixing tube (316) is in fluid communication with the liquid compartment (306) and the solid-liquid composition compartment (308). The liquid-supply tube (318) is in fluid communication with the liquid compartment (306) and a liquid solution container (366). A pump unit (301) is provided that includes a mixing pump (322), which is arranged to cause flow in the mixing tube (316); and a liquid-supply pump (324), which is arranged to cause flow in the liquid-supply tube (318). Other embodiments are also described.

A nozzle head (12) for a powder jet device (10) for use in applying dental material, the nozzle head (12) comprising: a first portion (16) and a second portion (18) transitioning into one another; the first portion (16) adjacent a first end (20) of the nozzle head (12) having a coupling (22) for removably connecting the nozzle head (12) to a hand piece (14) of the powder jet device (10); the second portion (18) adjacent a second end (26) of the nozzle head (12) forming a nozzle outlet (28) for the dental material; the second portion (18) comprising at least a first fluid channel (30) which is formed between the nozzle outlet (28) and a channel inlet (32); wherein the channel inlet (32) is arranged at the transition (34) between the first portion (16) and the second portion (18) between the nozzle outlet (28) and the coupling (22).

The present invention is a hand-held device for dispensing multiple controlled dosage of powered material having a main body, a cavity in the main body constructed and arranged to be operatively associated with an actuator for dispensing a medicament, an actuator constructed and arranged for dispensing said medicament from said cavity through a delivery device, and a tip attached to said second end of said main body, wherein said tip is constructed and arranged at a fixed angle relative to said main body to facilitate periodontal delivery of a medicament.

A dental apparatus is disclosed. The dental apparatus can comprise a pressure wave generator to be disposed at a treatment region of a tooth. The pressure wave generator can include an opening to deliver a flowable filling material to the treatment region. The apparatus can include a reservoir for supplying the filling material to the pressure wave generator. The pressure wave generator can be configured to generate pressure waves through the treatment region to cause the filling material to substantially fill the treatment region.

An apparatus for endodontic treatment, comprising: a nozzle connected to a fluid source comprising: a tip small enough to be inserted into a pulp chamber of a tooth; an inner geometry which forms a flow parameters including non-axial flow direction of nozzle fluid flowing through the inner geometry such that discharge fluid discharged from the inner geometry increase rotation of root canal fluid within a root canal sufficiently to remove tissue from the root canal.

A method is provided that includes injecting, during a dental procedure, from a first side of a bone, through (a) exactly one bore that passes through the bone from the first side to a second side of the bone, and (b) into a cavity adjacent to the second side of the bone, a solid-liquid composition of solid particles and a physiological liquid solution. During the dental procedure, the physiological liquid solution is drained from the cavity and through the bore while inhibiting passage of the solid particles of the solid-liquid composition, such that the solid particles accumulate in the cavity. Injecting the solid-liquid composition includes pumping the solid-liquid composition at a pulsating positive hydraulic pressure.

A method is provided that includes injecting, from a first side of a bone, through (a) exactly one bore that passes through the bone from the first side to a second side of the bone, and (b) into a cavity adjacent to the second side of the bone, a solid-liquid composition of solid particles and a physiological liquid solution. The physiological liquid solution is drained from the cavity and through the bore while passage of the solid particles of the solid-liquid composition is inhibited, such that the solid particles accumulate in the cavity.

An osteotome is shaped so as to define (a) a lumen through the osteotome, a distal end of the lumen opening through a distal opening disposed within 10 mm of a distal end of the osteotome, and a proximal end of the lumen opening through a proximal opening disposed at least 5 mm proximal to the distal opening, (b) a lateral external surface, at least a portion of which is shaped so as to define a screw thread that (i) has a distal thread end that is disposed within 10 mm of the distal end of the osteotome, and (ii) comprises one or more raised helical ribs going around the osteotome, and (c) one or more longitudinal drainage slots, which extend along at least respective longitudinal portions of the osteotome having respective longitudinal lengths of at least 5 mm, measured parallel to a central longitudinal axis of the osteotome.