DE11717C - Process for the production of metal-plated artificial dentures from rubber, celluloid and so on - Google Patents

Description

1880.

Class 30.

Dr. ROBERT TELSCHOW in BERLIN. Process for the production of metal-plated, artificial dentures from rubber, celluloid and so on.

Patented in the German Empire on April 14, 1880.

The present invention relates to a new process and the associated apparatus for the manufacture of metal-plated artificial ones Bits, which are based on rubber, celluloid or similar, through heat etc. In the plastic state displaceable substance is used.

It is well known that the first artificial dentures were made of gold or other metal, and the production of these dentures was carried out by punching out and driving a metal plate and soldering the teeth to this base. Since, however, the exact modeling of such a The basis on the palate was extremely difficult and time-consuming, so were gold suction bits not only imprecise and heavy, but also very expensive. One was therefore content with the most cases with narrow plates and only attached the dentures to the with clamps still existing teeth, which in turn damaged the latter.

By using plastic materials (rubber, celluloid, etc.) as a basis, there was on the one hand created a significant improvement, since dentures are made from these masses which exactly matched the shape of the palate by placing the dentures on a Gypsum model representing the palate was pressed.

On the other hand, there are certain inconveniences attached to these dentures: they cause discomfort when worn, irritate the palate and tongue and, according to some doctors, are even harmful due to the cinnabar and sulfur content of the rubber.
The new bits, which are the subject of this request, now combine the advantages of gold plate bits with those of rubber, celluloid, etc., as a basis. The plastic mass is retained as the base, but the teeth are entirely provided on the palate, and for the most part on the tongue side with a very thin metal plate, usually gold, so that the palate and tongue come into contact only with metal and absolutely cannot be irritated. This extremely thin metal plate is modeled according to a new process to exactly match the shape of the palate and firmly attached to the rubber or celluloid base during the manufacture of the latter.

To model the metal plate, use the one shown in the accompanying drawing Contraption.

This apparatus consists essentially of a hydraulic press A, the lower vessel α of which is connected to a pressure pump B and is closed by an elastic membrane b , which is kept tensioned by the metal ring c. The shape according to which the metal plate is to be pressed is contained in the hood d, which is fastened to the boiler by a bracket and pressure screw g connected rotatably to the boiler α.

The metal plate to be modeled is clamped between the hood d and the metal ring c.

The model consists of plaster that is hardened and modeled exactly according to the palate is. The manufacture of the metal plate. now takes place by successive pressing, whereby towards it care must be taken that the plate does not ripen. For this purpose it is pressed each time Carefully annealed, but the depressions in the model with it during the first pressings partially filled with a putty, and the pressure gradually increased, while still penetrating Drifting with a polished steel can help.

Has the metal plate assumed the shape of the model to some extent and is the putty away, a higher pressure is applied (up to 50 atmospheres). Under this pressure the plate adopts the finest depressions in the model and adheres to it in an airtight manner.

Fig. 5 shows the gypsum model with a finished pressed metal plate seen from below.

Such an extremely thin metal plate was able to match the palate as closely as possible cannot be manufactured according to the old method, as this involves a die cast in metal and needed a patrix, which after casting always contracted and changed its shape, so that the plates pressed on them did not correspond at all to the shape of the palate.

The type of production of the metal plate between the male and female mold always requires a strong plate; but this never takes on the fine modeling of the palate, makes the dentition heavy, and requires large suction chambers, which in turn damage the gums, in order to make the dentures suck. A manometer D is connected between press A and pump B and the three-way valve h can be used to connect the boiler to the pump and, after pressing, let the pressurized water out of the boiler. E is a reservoir.

It is clear that glycerine, oil, or any other liquid is also used as a pressure fluid can be.

After the metal plates have been prepared for the palate and tongue side of the dentition, the denture is modeled according to the known method and the plate is embedded in the cuvette at the same time. In order to achieve a firm connection of the palatal plate with the base, it is in advance, as shown in Fig. 6 in an enlarged Mafsstabe on this plate ο a fine metal wire mesh or individual metal wires soldered. The tongue plate ρ holds, as shown, into the mass; the edge of the same is perforated at the same time, whereby the plate is held and the structure is given a strength never before achieved.

Claims (1)

Patent claim: The production of metal-plated, artificial dentures with celluloid, rubber and so on as Basis, whereby a gypsum model modeled after the palate serves as the basis, and on this by means of successive pressing, as well as with gradual elimination of the initially depressions of the Modelies filling masses, initially the thin metal plates shaped to suit the palate, and then brought into the cuvette with Gebifs made in the known manner will. A soldered fine metal wire mesh is used to achieve greater strength or individual metal wires, and the tongue plate holds, as shown in the drawing, into the plastic mass. For this purpose ι sheet of drawings.