FR2602416A1 - Device for filling syringes for taking impressions in dental surgery - Google Patents

Abstract

Device intended to introduce fluid impression pastes used in dentistry into the bodies of syringes intended for this use. This device consists of a tube 1 with a diameter slightly less than the inner diameters of the cylinders of the aforementioned syringes. This tube has, over a partial length corresponding to the inner lengths of the aforementioned cylinders, a longitudinal sector opening 2, bevelled on the inside 3, on which slides, without clearance, a rectangular platelet 5 fitted with an orifice 6 with a shape identical to the notched cross-section of the tube 7.

Description

 The present invention relates to a device allowing rapid filling of syringes for injecting impression pastes for dental use.

 The filling of these syringes presents a series of difficulties.

These impression pastes, which harden by reactions, called condensation or addition reactions, require the use of a catalyst which must be mixed with a basic product. The mixing of the two elements must be done in a short treks time, so that the manipulator takes an impression with a material as fluid as possible, before it has hardened, by applying it in the mouth, using '' a syringe designed for this purpose. This fluid being too viscous to be drawn up by the tip of the syringe, it is introduced through the base of the cylinder using a spatula, or rather by rubbing this base slightly inclined on the malasage plate where is located the material, by trying to introduce the latter into the cylinder, by a series of short and rapid reactions. According to this method, there is a manifest loss of time, detrimental to the quality of the impression. In addition, the operator, afraid of running out of time, leaves a lot of product on the mixing plate.

 The device according to the invention makes it possible to remedy these inconveniences. By saving time by simplified handling, this ensures a better footprint, thanks to the use of the material in its optimal fluidity, while saving it.

The device is presented by a set of two parts, comprising
1 / A tube having a sectoral lonzitudinal opening over a partial length, corresponding to the internal dimensions of the syringe cylinders, usually used for this purpose. The sectoral opening is of a dimension corresponding to the quarter circle of the tube.

The free edges of this opening are bevelled on the internal face.

This open part of the tube is extended by a non-indented portion, equivalent to one third of the total length of the tube.

 2 / A rectangular plate perforated with a median orifice, in the shape of the indented section of the tube, the opening of which is oriented towards the length of the plate. The orifice is slightly larger in dimension than this section, to allow the plate to slide without play along the tube.

 The device can be made of rigid plastic, in an injection molding operation.

 The device according to the invention is used with the following baleen: the manipulator places the ready-to-use device on its work table, the plate being completely slid over the indented part of the tube. As soon as the mixing of the finger whores is finished, the manipulator takes the device by the solid part of the tube which serves as its handle, presents the sectoral opening of the tube on the mixing plate, and scrapes, by the beveled edge of this opening, the mass of the impression material, to load it inside the tube. This movement is practiced all at once, without difficulty. The tube being loaded, it is introduced into the syringe barrel. The perforated plate, which is against the base of the cylinder, is held with one hand in this position.At this stage, the user removes the tube with the other hand or moves quickly, and thus the plate, always maintained, will scrape all of the impression material inside the cylinder.

 Figures 1, 2, 3 show the device according to the invention.

The tube (1) has a total length of 12 cm, the diameter 0 cry 90, the thickness
O cm 10. Over a length of 8 cm, the tube has a sectoral opening the (2) equivalent to a quarter of the circumference of the tube. The internal edges of this opening have a short bevel (3). Over a length of 4 cm, the tube. is not indented (4). The rectangular plate (fig. 2) of 4 cm X 2 cm 5 x O cm 20, has an orifice (s), identical in shape to the open section of the tube (6). This orifice is slightly larger than the section of the tubef, i.e. 0 cm 15.

 A variant of the device according to the invention is provided by modifying only the dimensions of this device, in the case of use of impression material of the class of irreversible hydrocolibids where the injection syringes are larger than those provided for the materials originally cited.

Claims (3)

Claims. 1 / Device for filling syringes for impression taking in dental surgery, with fluid materials, characterized in that it comprises a tube (1) open over a sectoral length (2), where the material is loaded impression, and a rectangular plate (fig. 2) perforated with an orifice (5) which allows the plate to slide on this open part of the tube, this plate making it possible to scrape the material with impression inside the syringe barrel.  9 / Device according to claim 1, characterized by an unopened part of the tube (4), serving as a handle to the mKnipulator. 3 / Device according to claim 1 wherein the sectoral opening of the tube is of a length and a diameter which allows its introduction without excessive play in most of the syringe cylinders used for this purpose. 4 / Device according to any one of the preceding claims, characterized in that the tube comprises a sectoral opening provided with a bevel oriented inside said tube (3), baleen to facilitate the introduction of the material to imprints in the open part of the tube.  5 / Device according to claim 1 characterized in that the plate (fig 2) has a median orifice (5) of the same shape as the section of the tube at the sectoral opening (6), but of dimensions slightly greater than the Tube section.