US1112252A - Artificial tooth. - Google Patents

Description

Patented sept. 29, 1914.

UNITED STATES PATENT OFFICE.

GEORGE L. BIEN VENU, or NEW ORLEANS, LOUISIANA.

ARTIFICI AL TOOTH.

To all whom it may concern:

Be it known that I, GEORGE L. BIENVENU,-

a citizen of theUnited States of America, and resident of New ()rleans, in the parish of Orleans and State of Louisiana, have invented certain new and useful Improvements in Artificial Teeth, of which the following is a specification.

This invention relates to dentistry and particularly to artificial teeth.

An object of this invention is to provide novel means for producing artificial teeth having -a metallic backing, preferably of platinum and novel means for securing the platinum to the artificial teeth or porcelain, wherein the joint between the metal and the porcelain is leak-proof and whereby 'the metal is held securely in place through the medium of an anchor embedded in the porcelain, the same being so embedded when the tooth is molded and produced.

A still further object of this invention is to produce an artificial tooth in which the porcelain forming the tooth has molded into it a plate retaining device, the said plate retaining device likewise serving as an anchorage for a plate forming thebacking of the tooth, the said plate retaining device be ing caused to remain in place by reason of its being baked when the porcelain is undergoing the process of hardening and in course of manufacture.

It has been found in practice that artificial teeth now in use in crown and bridge work, known as pin facings, require a metallic backing'to receive the solder, and by the process of soldering, backing and pin are soldered together and same to crown or connects same to bridge, as the case may be; and when gold is used as a backing there is a liability of discoloration and also a chance of borax (which is used in the process of soldering) finding its way between pin and backing and affecting the tooth, causing it to check. There is also liability of burning the backing. and even when platinum is used, checking is not eliminated.

A still further object of this invention is the. method and means for anchoring the metallic hacking and in having the securing piu so located with respect tothe cutting edge and the shoulder of the artificial tooth that a pin of a small size may be employed, resulting in economy of material employed in manufacturing.

With the foregoing and other objects in Specification of Letters Patent.

Application filed December 20, 1913.

Patented Sept. 29, 1914..

Serial No. 807,966.

view, the invention ,consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to the accompanying drawings forming part of this specification wherein like characters denote corresponding parts in the several views, and in Y which- Figure 1 illustrates a perspective view of an artificial tooth with the backing applied thereto; Fig. 2 illustrates acentral vertical sectional view thereof; Fig. 3 illustrates a plan view of the backing plate; Fig. 4: illustrates a perspective view thereof; and Fig.

illustrates a sectional view showing the application of the backing employed in connection with artificial teeth to be substituted for the bicuspids or molars.

In these drawings 6 denotes the porcelain body, 7 the wire, preferably of platinum, of curved formation and having the body portion thereof embedded in the porcelain, the ends thereof projecting beyond the rear wall of the said porcelain. As has been stated,

the location of the ends of the wire or pin is of importance for by reason of its engaging the plate 8 near the cutting edge of the porcelain tooth and the shoulder thereof. the anchoring pin or wire may be comparatively small and yet it will be found sufficiently strong to retain the backing in place, es ecially so as, as has been stated, the backing plate is to all intents and purposes an integral part of the porcelain, due to the fact that the metal and porcelain are baked while the porcelain is undergoing the process of hardening.

The ends 9 of the pins may be offset or riveted or they may be secured by solder.

Fig. 5 illustrates the manner of forming the artificial teeth which are to be used as substitutes for the bicuspids and molars, the same comprising porcelain 10 having a concaved surface 11 and a backing 12 conforming to the contour of the rear surface of the teeth, said backing being furthermore held in place by a pin or wire 13 which performs, in this construction, the function of the wire or pin 7 heretofore described. The purpose of producing the teeth shown in Fig. 5 with the concaved and curved rear wall or side is to provide a cavity or recess to accommodate solder which may be used for securing bridges in place and in order that the said solder Wlllfill out the curve of the hollow making the rear wall practically straight when so filled out. The provision thus made for receiving the solder will permit the construction of bridge-Work Without making the same bulky and furthermore as the cuspids of the teeth will be porcelain throughout,

the appearance of the same will be natural.

1 claim In an artificial tooth, a porcelain body, a

metallic backing therefor, and a wire for securing the backing baked together, said Wire being embedded in the porcelain and having ends projecting through the rear Wall thereof and through the backing for securing the 15

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