JPS6054062B2 - Brazing device for dental prosthetic crowns - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dental brazing device for brazing prosthetic crowns of metal bond porcelain and crownwork.

Conventionally, in order to solder prosthetic crowns made of metal bond porcelain or crownwork, several prosthetic crowns were temporarily attached onto an uncured mass of naturally hardening solder investment material that had been kneaded into a paste. Apply mold release wax to the lip of the porcelain, press it down to the extent that the tooth neck is slightly buried, position it, leave it for about an inch to naturally harden, and then put it in an electric furnace. A method was used in which the temperature was gradually raised from room temperature to around 800°C over a period of about 2 minutes, and then soldered.

With this method, rapid heating is not possible as the soldering investment material will crack or break, so it takes a long time to heat up. In addition, the porcelain material (porcelain) deteriorates and discolors severely due to long-term heating, and the soldering investment material that supports the prosthetic crown has a large mass that cannot be soldered from below. Since it is heated, it expands and deforms, resulting in problems such as deviating from the dimensional accuracy of the prosthetic crown. The purpose of this system is to compensate for these shortcomings, make technical work easier, shorten heating time, improve quality and dimensional accuracy, make work easier, and at the same time shorten work time. , will be explained in detail based on the drawings.

Reference numeral 1 denotes a support plate, which can be of any shape, but examples are shown in Fig. 1 of a horseshoe shape, Fig. 2 of an oval shape, and Fig. 3 of a circular arc shape. This support plate 1 is made of a metal whose expansion coefficient is the same as or similar to that of the prosthetic crown metal, or of alumina ceramics or silicon nitride ceramics, and has a large number of small holes 1a or long holes 1b drilled in the plate surface. There is. Further, legs 1c are appropriately provided around the periphery, so that it can be placed directly on an appropriate stand for work, or can be used to position it on a pedestal 5, which will be described later. 2 is the support pin, the 5th
As shown in the figure, the lower end is inserted into the small hole 1a or the long hole 1b of the support plate 1, and the inner cavity of the prosthetic crown 3 is placed over the tip to support it, and is similar to the support plate 1 described above. As shown in Figure 3, there are various types of pins, such as straight ones (A), ones with a flange at the mouth, and ones with the top and bottom of the pin eccentric at the position of the tsuba (C). The tip 2a is flattened to make it easier to stand on the paste-like soldering investment material filled in the inner cavity of the prosthetic crown 3, and the flat surface prevents rotation, and the lower end is slightly shaved off. 2b, and those with a flange have a flange shape other than circular to prevent rotation when fixing with an investment material for soldering described later.

The straight one shown in A is the one that allows you to freely decide the height of the tip when planted on the support plate 1, and the mouth flange 2c.
1 serves as a receiving part when it is planted on the support plate 1, and the eccentric part 3 is adjusted by turning in order to align it with the alignment of the teeth of the prosthetic crown 3. A large number of support pins 2 having various shapes as described above are prepared, and an appropriate one is selected and used.

After the support pin 2 is placed on the support plate 1 in alignment with the prosthetic crown 3, a naturally hardening soldering investment material 4 kneaded into a paste is applied to both the front and back sides of the support plate, as shown in Fig. 5. to solidify the footing of support pin 2.

Another method is to fill the recessed part 5a provided on the upper surface of the pedestal 5 shown in FIG. The leg portions of the support pins 2 protruding from the lower surface of the plate are positioned by standing in the soldering investment material.

Furthermore, if the solder investment material is applied to the feet of the support pins on the top surface of the support plate 1, the support pins will be stably fixed, making the work easier than when the aforementioned pedestals are not used. Since the position is less likely to go out of order, accuracy is improved. Next, the inner cavity of the prosthetic crown 3 is also filled with the investment material for soldering, and the tip of the support pin 2 is covered with it and the setting work is completed.
Leave this for about 30 minutes until it hardens naturally.

When the foot of the support pin 2 is solidified with the soldering investment material 4 in this manner, the support pin 2 is prevented from rotating by the scraped-off portion 2b at the lower end of the support pin 2 and the non-circular collar 2c. If you use the pedestal 5, remove the pedestal and 8.
When placed in an electric furnace adjusted to about 20℃, the temperature ranges from 30 to 608℃.
The temperature of the prosthetic crown 3 is now suitable for soldering.

At this time, if you melt 1 cypress solder 7 with a blow vibrator and apply it to the tip of the soldering jig 6, which is a long nickel chrome wire with an appropriate handle, it will adhere as a round ball.
When a small bead of cypress is applied to the joints of adjacent prosthetic crowns, which are the soldering points, on top of which borax has been applied as flux, 1.
The cypress metal flows neatly and is soldered. One after another, the adjacent teeth are soldered using the same process. Once soldering is completed, the prosthetic crown is removed from the electric furnace and cooled, and the prosthetic crown is removed from the support pins to complete a series of metal bonded porcelain and crownwork prosthetic crowns. However, in the case of crown work,
Since the porcelain is not welded and only metal is used, it is possible to heat and solder with a blow vibrator as usual without using an electric furnace. After completing the soldering in this manner, the soldering investment material is removed and the support plate 1 and the support pins 2 are prepared for the next use.

The product completed as described above has an extremely short heating time of about 30 to 6 [phases], so there is very little oxidation of the metal parts, and very little deterioration or discoloration of the porcelain parts. Because the amount of expensive 1 hinoki iron used is minimal,
It is very economical, and the combination of the support plate and support pin makes it easy to position the prosthetic crown, and since it is firmly fixed with the solder investment material, it is accurate without any deviations, and a product of extremely high quality can be obtained. Moreover, the series of work times can be significantly shortened compared to conventional methods, making it highly efficient.Furthermore, the use of a cradle further improves work efficiency, making it an excellent dental brazing device in all respects. It is temporary.

・Brief explanation of the drawings The attached drawings show embodiments of the present invention.
Figures 3 and 3 show examples of support plates; Figure 1 is a horseshoe-shaped one, Figure 2 is an elliptical one, Figure 3 is a perspective view of a simple arc-shaped support plate, and Figure 4 is a perspective view of a simple arc-shaped support plate. In a perspective view showing a support pin,
A is a straight one, 2 is a one with a flange, C is a diagram showing an eccentric one at the position of the tsuba, Fig. 5 is a local side view showing the state of use with the prosthetic crown set, and Fig. 6 is a horseshoe shape. FIG. 7 is a perspective view of a cradle for a support plate, and is a diagram showing a conventional method.

1...Support plate, 1a...Small hole, 1b.
...Elongated hole, 1e...Leg, 2...Support pin, 2a...Tip of support pin, 2b...
...Shaving off part of support pin, 2c...Brim of support pin, 3...Prosthetic crown, 4...Investment material for soldering, 5... cradle, 6...brazing jig, 7...14-karat gold solder.

Claims (1)

[Scope of Claims] 1. A supporting plate of an appropriately shaped shape having a large number of small holes or long holes on the plate surface and legs provided at several places around the plate, and a lower end of the support plate having a plurality of small holes or long holes on the plate surface, and a support plate having a suitable shape and having legs at several places around the plate. Two or more pins are inserted so as to protrude from the back surface, fixed with investment material on the front or back side of the support plate, or on both the front and back sides, and a large number of long and thin support pins are used to cover and support the prosthetic crown to be brazed to the tip. The brazing device for a dental prosthetic crown is characterized in that the support plate and the support pin are made of metal or ceramics with an expansion coefficient that is the same as or similar to that of dental metal. 2. A support plate of an appropriately shaped shape that has many small holes or long holes on the plate surface and legs at several places around the plate, and inserts the lower end into the small holes or long holes of this support plate so that it protrudes to the back side. Two or more pins are planted, the tips of which are covered with a large number of elongated support pins to support the prosthetic crown to be soldered, and the upper surface has a recessed part for filling with a naturally hardening investment material for soldering that has been kneaded into a paste. It is used in combination with a pedestal on which the lower end of the support pin planted on the support plate is pushed up into the investment material for soldering filled in this recess, and the support pin is fixed by placing the support plate on it. A brazing device for a dental prosthetic crown, characterized in that the brazing device is configured to do the following: