DE7226159U - Dental spray handpiece - Google Patents

Description

State of the art

The DT-AS 1 110 362 has a built-in spray handpiece Medication container known, in which the medicament in the container by the compressed air of the compressed air line is pressed into the pressure water pipe. This has the consequence that the pressure conditions always be precisely matched and kissing must not change during the dental treatment so that the concentration desired by the dentist, i.e. the Mixing ratio drug-water, exactly maintained. There is also the disadvantage that if it is increased slightly

t of the pressure in the pressurized water line versus the pressure in

water enters the medication container from the compressed air line, impairing or disrupting the function *

It is still a dental one through the DT-AS 1 283 ^ 35 Injection handpiece known in which the medicament container is arranged on an attachable nozzle piece. The medicine container contains a drug mixed with water and diluted with it, so that this mixture is used up relatively quickly is. If you want to dispense the water-drug mixture with this syringe handpiece, the instrument must be shut off coming pressurized water line necessary, otherwise an even greater and unusable dilution of the drug Consequence would be. The valves or the like required for the aforementioned water shut-off represent an increased technical effort In addition, oils compressed air only to the Medication acts and causes the diluted medication to escape from the syringe end of the nozzle piece alone. As a result, no nebulization takes place when it emerges from the end of the injection.

task

The innovation specified in claim 1 is based on the object of always achieving uniform and good nebulization of the drug when it emerges from the injection end of the nozzle piece.

advantages

Since the compressed air line runs to the spray end of the nozzle piece and there is no connection whatsoever to the pressurized water line, there is even nebulization when it emerges from the end of the spray achieved, which also contributes to the independence of the pressure conditions in water and air.

Advantageous further developments of the innovation are in the subclaims described. In the embodiment of the spray handpiece according to claim it is achieved that a highly concentrated medication container Medication can be introduced as the required dilution is achieved by mixing with the pressurized water downstream of the medication container he follows. As a result, the contents of the medication container hold compared to the prior art for a longer period of time. In this case, the amount of passage through the drug line can be determined in a known manner can be adjusted with the help of a control valve. To achieve that when using warm pressurized water and / or warm compressed air means that the medicament is well heated to about body temperature, the syringe handpiece is according to claim educated.

Presentation of the innovation

An embodiment of the innovation is explained with reference to FIGS. Show it:

Fig. 1 shows a nozzle piece of a dental spray handpiece in section and

FIG. 2 shows a section along the line II-II in FIG. 1

In the drawing, 1 is generally a nozzle piece of a dental Spray handpiece called. In Fig. 1, the connection end 2 of the nozzle piece is on the right for attaching to a Spray handpiece visible. With 3 is the compressed air line and with

- 5 -
k denotes the pressure water pipe.

The compressed air line 3 opens into a distribution chamber 3a of the nozzle piece 1 and continues from here to the injection end of the nozzle piece 1. The medicament container 8 contains an undiluted dental medicament. The medicament container 8 has a riser pipe 9, the lower end of which is provided with a filter. The riser pipe is connected to a medication line 11 of the nozzle piece 1, which also extends to the end of the injection 5. The same applies to the pressurized water line k, which does not have any branches.

At the end of the nozzle piece 1 opposite the connection end 2, the latter has a canoe. j? in which the mentioned lines 3 »^ ^u * icl 11 are connected. The cannula 12 is rotatable relative to the nozzle piece 1 about the axis 12a as a non-bent part. In the illustrated embodiment, the medication line 11 is concentrically surrounded by the pressurized water line k and this concentrically by the compressed air line, which is advantageous when using heated compressed air and heated pressurized water with regard to the heating of the medication located in the medication line 11. The lines 3 and k can also be interchanged.

At the exit of the spray end 5 is a spray nozzle known per se 5a provided. The aerosolized air-water-medicament mixture escaping is denoted by 13.

As can be seen from FIG. 2, a control valve 15 which can be actuated by a rotary knob 11 is built into the drug line 11.

The patent attorney

Claims (2)

Protection claims 1. Dental spray handpiece for dispensing Air and water, with an attachable nozzle piece with a medicine container, its compressed air line for the purpose of pressing out the liquid medicament from the medicament container opens into the latter, thereby geke.nnze.ichr.et that the compressed air line (3) runs to the spray end * · (5) of the nozzle piece (1) and one has branch (6) acting on the medicament »» 4 and to the medication container (8) a special, for Injecting (5) leading drug line (11) is connected. 2. Spray handpiece according to claim 1, characterized in that the pressurized water line (k) runs without branches to the spray end (5). 3, spray handpiece according to claim 1 or 2, characterized characterized that in the nozzle piece (l) downstream of the medium -2- kamenteiibebälters (8 / die Kedikanentenleitung- (11} konzen'ri'-ch from the pressure water line (^) and the compressed air line (3) is surrounded.