A dental syringe that facilitates the expulsion of air from a syringe body when dental material is injected into the syringe body from a discharge port of the syringe body and the discharge of the dental material from the syringe body during use for treatment. The syringe includes a syringe body, a plunger, and an O-ring that is mounted in an engagement groove formed at a front end portion of the plunger. The engagement groove includes a shallow groove at the front end side and a deep groove at the rear end side. When the dental material is injected into the syringe body, the O-ring engages with the shallow groove, and when discharging the dental material, the O-ring engages with the deep groove.

Systems and methods for using a liquid jet apparatus for dental treatments are disclosed. In one implementation, the liquid jet apparatus may include a handpiece configured to deliver a high velocity liquid jet to a desired location in the mouth of a patient. The handpiece may include a positioning member having a channel through or along which the jet can propagate. The positioning member may have a distal end portion configured to be at least partially disposed in a pulp cavity, canal space, or opening in the tooth under treatment. During operation, the jet may impact an impingement surface of the distal end portion of the positioning member and be deflected as a spray through one or more openings in the distal end portion. The liquid jet apparatus may be used for root canal treatments.

Systems and methods for using a liquid jet apparatus for dental treatments are disclosed. In one implementation, the liquid jet apparatus may include a handpiece configured to deliver a high velocity liquid jet to a desired location in the mouth of a patient. The handpiece may include a positioning member having a channel through or along which the jet can propagate. The positioning member may have a distal end portion configured to be at least partially disposed in a pulp cavity, canal space, or opening in the tooth under treatment. During operation, the jet may impact an impingement surface of the distal end portion of the positioning member and be deflected as a spray through one or more openings in the distal end portion. The liquid jet apparatus may be used for root canal treatments.

The present invention discloses an induction heating type dental filling device including a body unit grippable by a user, a filling unit containing a refillable filling material and connected to the body unit so that one side thereof is insulated from the body unit, a heating unit disposed in close contact with the filling unit and heating the filling material using induced current to convert the filling material into a liquid state, a pressing unit for pressing the heated filling material to discharge the heated filling material to the outside of the filling unit, and a shielding unit for shielding the heat and magnetic field of the heating unit. According to this configuration, heat loss through the filling unit may be prevented and clamping force for the body unit may be excellent, so that the efficiency of filling a filling material for dental treatment may be improved.

The present invention discloses an induction heating type dental filling device including a body unit grippable by a user, a filling unit containing a refillable filling material and connected to the body unit so that one side thereof is insulated from the body unit, a heating unit disposed in close contact with the filling unit and heating the filling material using induced current to convert the filling material into a liquid state, a pressing unit for pressing the heated filling material to discharge the heated filling material to the outside of the filling unit, and a shielding unit for shielding the heat and magnetic field of the heating unit. According to this configuration, heat loss through the filling unit may be prevented and clamping force for the body unit may be excellent, so that the efficiency of filling a filling material for dental treatment may be improved.

One aspect relates to a device for the production of a bone cement dough from a monomer liquid and a cement powder comprising a cartridge with an internal space; a cartridge head with a dispensing opening; a conveying plunger that is supported in the internal space of the cartridge such that it is pushable in the direction of the dispensing opening; a dispensing plunger between the dispensing opening and the conveying plunger that is supported in the internal space of the cartridge such that it is pushable in the direction of the dispensing opening; a first hollow space, in which the cement powder is arranged; a second hollow space that is bordered by the dispensing plunger and the conveying plunger; a rear-side part of the internal space of the cartridge; and a conducting means that connects the second hollow space to the rear-side part of the internal space of the cartridge such as to bypass the conveying plunger and be permeable to the monomer liquid. The conducting means can be closed by the conveying plunger with respect to the second hollow space by shifting the conveying plunger in the direction of the dispensing plunger, and a feedthrough in the dispensing plunger that connects the first hollow space and the second hollow space such as to be permeable to the monomer liquid.

One aspect relates to a device for the production of a bone cement dough from a monomer liquid and a cement powder comprising a cartridge with an internal space; a cartridge head with a dispensing opening; a conveying plunger that is supported in the internal space of the cartridge such that it is pushable in the direction of the dispensing opening; a dispensing plunger between the dispensing opening and the conveying plunger that is supported in the internal space of the cartridge such that it is pushable in the direction of the dispensing opening; a first hollow space, in which the cement powder is arranged; a second hollow space that is bordered by the dispensing plunger and the conveying plunger; a rear-side part of the internal space of the cartridge; and a conducting means that connects the second hollow space to the rear-side part of the internal space of the cartridge such as to bypass the conveying plunger and be permeable to the monomer liquid. The conducting means can be closed by the conveying plunger with respect to the second hollow space by shifting the conveying plunger in the direction of the dispensing plunger, and a feedthrough in the dispensing plunger that connects the first hollow space and the second hollow space such as to be permeable to the monomer liquid.

A device for dispensing a dental material has a cartridge with a dispensing end. The dispensing end has a dispensing opening for the dental material. The dispensing end further has in essence an axially symmetric shape with a truncation. The truncation provides the dispensing end with a generally flat dispensing surface through which the dispensing opening extends. The device has further a cap received on the dispensing end. The cap and the dispensing end are rotatable relative to each other between an open position, in which an orifice in the cap uncovers the dispensing surface, and a closed position, in which a closed space is formed between the cap and the dispensing surface. The device allows for a relatively convenient dispensation of dental material, in particular for a dispensation of a dental composite filling material.

A device for dispensing a dental material has a cartridge with a dispensing end. The dispensing end has a dispensing opening for the dental material. The dispensing end further has in essence an axially symmetric shape with a truncation. The truncation provides the dispensing end with a generally flat dispensing surface through which the dispensing opening extends. The device has further a cap received on the dispensing end. The cap and the dispensing end are rotatable relative to each other between an open position, in which an orifice in the cap uncovers the dispensing surface, and a closed position, in which a closed space is formed between the cap and the dispensing surface. The device allows for a relatively convenient dispensation of dental material, in particular for a dispensation of a dental composite filling material.

The invention relates to a flashlight device comprising at least one unit for generating flashlight and at least one unit for focusing the generated flashlight. The invention further relates to methods for the use thereof and to a set comprising at least one flashlight device according to the invention and a light-curable material, and to a device.