US1220239A - Artificial tooth. - Google Patents

Description

E. F. KLUMB.

ARTIFICIAL TOOTH.

APPUCATION FILED OCT- 28. 1MB.

1,220,239. PatentedMar.27,1917.

I INVENTOR WWNESSES Ma/z/FH/amb M av Mg fi ATTORNEY EDWARD F. KLUMB, OF CHICAGO, ILLINOIS.

ARTIFICIAL 'roo'rn.

Specification of Letters Patent. Patented Mar. 27,1917.

Application filed October 28, 1916. Serial No. 128,266.

To all whom z'tmayconcem:

Be it known that I, EDWARD F. KLUMB, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and use ful Improvements in Artificial Teeth, of which the following is a specification.

This invention has relation to the mechanical arts of dentistry, and the nature and objects thereof will be readily apparent to those skilled in the art to which it appertains in the light of the following explanation of the accompanying drawings, illustrating what I now believe to be the pre ferred embodiment, or mechanical expression, of my invention from among other forms and arrangements within the spirit thereof, or the scope of the appended claims.

However, an object of the invention is to provide improvements in connecting devices whereby to permit the mounting of a porcelain crown upon the root of a tooth, formed or shaped to receive the connecting device.

In addition to the foregoing my invention comprehends improvements in the details of construction and arrangement of parts to be hereinafter more fully described and particularly pointed out in the appended claims.

In the accompanying drawings in which similar and corresponding parts are designated by the same characters of reference throughout the several views in which they appear:

Figure 1, is a view in side elevation of a root to whlch a crown has been secured by means of a device constructed after the manner of this invention.

Fig. 2, is a view of the same in rear elevation.

Fig. 3, is a view of the crown and root in front elevation.

Fig. at, is a longitudinal sectional view taken through the crown, root and the device connecting the two, and

Fig. 5, is a view in perspective of a porcelain crown, modified for association with a securing device constructed after the manner of my invention.

Fig. 6, is a view in perspective of the securing device.

With reference to the drawings, 1 inclicates the root of a tooth, the upper portion of which has been shaped to receive the securing device of the present invention. The device in question is formed by casting or other methods, of metal, indicated at 2, and

is provided preferably with a cavity 8 upon its under face, designed to closely engage th projecting end of the tooth which has been shaped to conform to the inner surface of the cavity. If desired, the under side of the device may be formed centrally of the cavity with a dove tail projection 1 to enter a correspondingly formed recess in the root whereby the device may be more securely at tached thereto. By cementing the device upon the root, a permanent connection isestablished between the two.

The forward face of the connecting device is inclined upwardly and rearwardly from the base as indicated at 5, and said face is furthermore formed with a dovetailed recess indicated at 6.

The porcelain crown indicated generally at 7 is cut away upon its rear face to form a dove-tailed projection 8 adapted to. closely engage the sides of and fit in the recess 6 of the securing member. I/Vhen the porcelain crown is thus inserted in its securing member, the front face of the crown is curved'adjacent the gum to conform to. that portion of the securingdevice which is exposed, and has the appearance ofa band as indicated at 9 in Fig. 3. If desired however, the crown may be extended to cover said portion of the device whereby entirely excluding the same from view. The rear face of the securing member is curved and convex as at 10, to

conform to the. curvature of the rear face of a natural tooth, said curvature merging into the rear face of the crown indicated at 11. To further establish a close fit between the crown and securing device, the apex of the device may be cut away transversely at 12 to provide a shoulder 13 against which the correspondingly formed shoulder 14 of the crown may abut. The inclined face 5 of the device may be furthermore recessed as at 15 to receive the correspondingly formed portion 16 upon the inner face of the crown thereby forming a rest for said crown to resist the strain placed thereupon when a person having such a crown and securing memher, is masticating food.

Thus it will be seen that I have provided a novel device which may be readily engaged upon and secured to the projecting portion of an old' root, and which is adapted to receive and releasably hold a porcelain crown, presenting toward the front the appearance of a natural tooth. Furthermore, I have embodied in the securing device means whereby when the crown is brokenor otherwise injured it may be readily removed without removing the device from the root or altering the root in any manner whatsoever, and replaced by another, the device when once secured upon the root forming a permanent part thereof. In this manner, the use of a pivot crown is obviated together with the disadvantages incidental thereto and the discomfort and suffering caused the patient when a broken pivot must be removed. Other advantages will occur to those employing the device.

lVhile I have illustrated and described my invention with some degree of particularity I realize that various alterations thereover may be made and I therefore reserve the right and privilege of changing the form of the details of construction, or otherwise altering the arrangement of the correlated parts without departing from the spirit of the invention or the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. An artificial tooth including a metallic member adapted to be secured upon a root, a porcelain tooth member, and a dove tail connection between said porcelain tooth memher and the metallic member.

2. An artificial tooth including a metallic securing adapted to be permanently engaged upon a root and having a recess and a porcelain tooth member adapted to be engaged upon the metallic member and having a projection for entering the recess therein.

3. An artificial tooth including a metallic member adapted to be engaged upon a root and having a cavity upon its under side in which the root is engaged, said metallic member having upon its forward face a dovetail recess, and a porcelain tooth member adapted to be engaged against the forward face of the metallic member, and having a dovetail projection to enter said recess.

4:. An artificial tooth including a metallic member adapted to be engaged upon a root and having an inclined forward face, and a cavity provided in said face, a shoulder provided upon the upper surface of the member, and a porcelain tooth member having its rear face formed to engage the inclined face of the metallic member, a projection for entering the cavity of the metallic member, .and a shoulder for engaging the shoulder of said metallic member to secure the porcelain and metallic members together against displacement in any direction other than the direction in which the parts are brought together, fOr connection.

In testimony whereof I affix my signature in presence of two witnesses.

EDWARD F. KLUMB.

Copies of this patent mly be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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