US1230852A - Artificial tooth. - Google Patents

Description

R. H. BOWSHER.

ARTIFICIAL 100m.

Patented June 26, 1917.

[N VEN TOR whee" Uninn srarns RUTHERFORD H. BOWSI-IER, OF ADELPI-II, OHIO.

ARTIFICIAL TOOTH.

Application filed March 27, 1913.

To all whom it may concern:

Be it known that I, RUTHERFORD H. Bmvsrrnn, acitizen of the United States, residing at Adelphi, in the county of Ross and State of Ohio, have invented certain new and useful Improvements in Artificial Teeth, of which the following is a specifica-tion.

This invention relates to the structure of artificial teeth and it includes the novel features hereinafter described and particularly pointed out in the claim.

An object of the invention is to provide means for reinforcing an artificial tooth which means is concealed behind the body of the tooth and is securely connected with same so that the tooth may not become dis placed with relation to the brace.

A still further object of the inventionis to provide specific means for connecting the brace with the tooth so that the tooth may be freely used and may effectually withstand strains in all directions while in use.

Another object of the invention is to provide a tooth of the character indicated which is convenient when fitting an artificial bridge in the mouth before it is fastened permanently in position.

With these and other objects in view, the invention consists in certain novel features of construction as hereinafter shown and de scribed, and then particularly pointed out in the claim and in the drawings illustrative of the preferred embodiment of the invention.

In the accompanying drawings Figure 1 is a side elevation of a tooth with the brace removed.

Fig. 2 is a perspective view of the same.

Fig. 3 is a vertical sectional View of the tooth with the brace applied- Fig. 4 isa perspective view of the brace with pin attached.

Fig. 5 is a perspective view of the tooth and brace disconnected.

Fig. 6 is a perspective view of a modified form of tooth and brace.

Corresponding and like parts are referre to in the following description and indi cated in all the views of the accompanying drawings by the same reference characters.

As illustrated in Figs. 1 to 5 inclusive the tooth includes a body 1 which may be of porcelain or other suitable material. As

Specification of Letters Patent.

Patented June 26, 1917.

Serial No. 757,137.

shown in the said figures the tooth is illustrated as an incisor.

The body 1 is provided with a longitudinally disposed bore 2 which extends from the upper end of the body to a point between the ends thereof and is disposed along the lingual portion of the said body. A bore 3 enters the body 1 from the back thereof and is upwardly and forwardly inclined. The upper end of the bore 3 enters the lower end of the bore 2. These bores are adapted to receive the cement by means of which the tooth is held against the brace as will be hereinafter explained.

As illustrated in the said figures the brace comprises a back plate 4 which is of metal preferably gold or platinum. This plate fits snugly against the rear face of the body 1 and is provided at its lower portion with an angularly disposed flange 5 adapted to fit under the incisal edge or end of the body 1. The flange 5 is disposed at any desired angle with relation to the plane of the plate l. The plate lis provided upon its forward side with an upwardly and forwardly disposed fixed pin 6 which enters the bore 3 when the plate 4 is in position against the back of the body 1. The cement in the bore 3 fills the space between the pin 6 and the inner wall of the said bore and when the cement is hard it holds the tooth in position on the brace. When the pin 6 is being inserted in the bore 3 any excess of cement which may be in the bores 3 and 2 is pushed by the said pin up through the bore 2 and out at the upper end-thereof, so that when the pin 6 is in position in the bore 3 both the bores 2 and 3 are completely filled with cement.

By this arrangement it will be seen that the plate 4 serves as a brace for the body 1 and extends the entire length thereof along the back surface. This material strengthens the body 1 and the flange 5 of the plate 4. protects the incisal edge of the body 1 against wear. The pin 6 mav be disposed, at any upward angle but preferably at." forty-five degrees to the plane of the plate 4.

In the form of the invention as illustrated in Fig. 6 the lower portion of the body 1 is provided at its incisal edge with a recess 7 which receives the flange 5 of the plate 4. Therefore in this form of the invention the flange 5 covers only part of the incisal edge of the body 1.

In both the forms of the invention the backs of the teeth are ground to approximately the same angle of inclination and the bores 3 are disposed at the same angle With relation to the hack faces of the teeth. Likewise all bracing plates are made With approximately the same planes and same flanges with pins attached at approximately the same angle with relation to the planes of the brace. Therefore all similar teeth are interchangeable.

Having described the inventionv What is claimed: is

A tooth comprising a body, having abore extending longitudinally from the upper end thereof and a bore entering the body from the back thereof and joining directly the end of the first mentioned bore at an obtuse angle, a plate applied to the back of the tooth and having a pin which enters the second mentioned bore.

In testimony whereof I afiiX my signa ture in presence of two Witnesses.

RUTHERFORD H. BOWSHER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

Images