US772104A - Artificial tooth. - Google Patents

Description

PATENTEID OCT. 11, 1 904. G. 0. KUSBL. ARTIFICIAL TOOTH. I APPLIGATION FILED DEG .12. 190 3. 7

N0 MODEL.

WITNESSES ,4 TTORNEV.

UNITED STATES Patented October 11, 1904-.

PATENT OFFICE.

ARTIFICIAL TOOTH.

SPECIFICATION forming part of Letters Patent No. 772,104, dated October 11, 1904.

Application filed December 12, 1903. Serial No. 184,957. (No model.)

To (ZZZ whom it may concern:

Be it known that I, GEORGE C. KosEL, a citizen of the United States, residing at Devon, in the county of Chester and State of Pennsyl- Vania, have invented a new and useful Artificial Tooth,of which the following is a specification.

My invention relates to improvements in means for providing porcelain or other similar faces to metallic structures, and is especially adapted for use in connection with artificial-tooth crowns, my object being to secure the porcelain face or other desired face or surface upon a metallic plate, which plate in turn is adapted to be secured to or have secured to it the other portions of a desired structure.

In the accompanying drawings, Figure 1 is a vertical sectional view of the metal plate with the enameled facing suitable for a toothcrown on the line 1 1 of Fig. 2. Fig. 2 is a horizontal section of the same. Fig. 3 is a horizontal section with the balance of the tooth-crown filled in. Fig. 4 is a similar view as that shown in Fig. 3 with a variation in form of metal plate. Fig. 5 isa similar view with a straight metal plate instead of a concave one. Fig. 6 is a vertical sectional view of the finished tooth-crown. Fig. 7 is an elevation of the metal plates, showing crosshatching for more efficient engagement with the enamel.

Similar numerals refer to similar parts throughout the several views. I

My invention is particularly useful in connection with the construction of crowns for artificial teeth.

A usual method of providing tooth-crowns with porcelain surfaces has been to employ metallic pins embedded in said porcelain, to which pins is secured the structure carrying the band or socket. These pins to have a suflicient hold must of necessity be embedded into a considerable mass of enamel, from which it follows that the enamel crowns must be of considerable thickness, so thick and massive, in fact, that they must invariably be grounddown and cut out to make room for the pin and other portions of the structure which cooperate in the formation of the complete crown. Another method for providing enamel faces to porcelain crowns has been to fuse the porcelain upon the perforated surface of a complete hollow metallic crown. This method obviously implies that such crown must be especially constructed for its specific or individual case. The purpose, therefore. of my invention is to obviate some of the objections in both of the methods above alluded to.

I provide a thin metallic plate 1, preferably of metal melting only at a very high temperature. When intended for tooth-crowns, it may be desirable to shape this plate as nearly as possible to correspond to the front dimensions of the visible portion of the crown. I serrate, corrugate, or cross-hatch the outer or con vex surface 2 of this plate-for example, as-shown in Fig. 7 then apply a thin coating 3, of enamel or similar material, upon this convex surface of the plate, and then subject the same to a heat sufficient to fuse the enamel to the metallic plate 1. Into the concave side of this plate 1 may be formed the body 1 of the crown, composed of solder or other desired material, to which may be secured also the pin 5 for insertion in the root of the tooth and the band or socket 6 for surrounding said root of the tooth. In other words, this enamel-faced metallic plate 1 is readily adapted to have the pin 5 and the band 6 secured directly and firmly to it without the intermediate steps of first securing the metallic plate 1 to the enameled front 3 by means of pins embedded in said enamel, which must in turn be soldered to the metallic plate. Furthermore, the necessity is avoided of cutting or grinding away a large portion of said enameled crown to make room for the pin 5 and other structure to be added thereto. This is because the metallic plate 1 can be formed 'concave and of the desired dimensions and then treated with an extremely thin coating of enamel or other facing material, so that ample space is left for filling in with the body 4 of the crown and securing thereto the pin 5 and the band 6, if such is required.

As shown in Figs. 2 and 3, the metallic plate 1 may be made of greater dimensions than the enamel facing 3, so that the ends 7 and 8, which project from either side of the enamel 3, may be caused to embrace the body 4, as shown in Fig. 3. Of course in some cases these corresponding ends? and 8 may be omittedfor instance, as shown in Fig. 4and there may be cases in which it is desirable to have the plate 1 straight and flat, as indicated in Fig. 5, instead of in the concave form.

For the purpose of securing a more substantial and eflicient cooperation between the metal and the enamel, porcelain, or other similar material I may corrugate or in any other suitable way roughen the surface of the metal plate to which the porcelain or enamel is se- A cross-hatching is indicated at 2 in artificial denture requiring the application of an enameled surface to ametallic body or base.

Vhile I have described my device as ap plied to the construction of artificial-tooth crowns, it is obvious that the invention may, be readily applied to other structures comprising a metallic plate faced with porcelain, enamel,or other similarmatcrial to which other portions of the desired structure may readily be secured.

What I claim is 1. An article of manufactureconsisting of an artificial-tooth structure comprising athin metallic plate having a facing of enamel or other similar material fused to one side thereof and adapted to be secured to a supporting dental structure.

2. An artificial-tooth structure comprising a thin metallic plate having a facing of enamel or other similar material fused to one side thereof, and a solid metallic body portion secured to the other side thereof.

GEORGE C. KUSEL. \Vitness es: 7

VILLIAM E. CHAPMAN, MAE HOFMANN.

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