US2394659A - Artificial tooth and anchor therefor - Google Patents

Description

Feb. 12, 1946. BREYER 2,394,659

ARTIFICIAL TOOTH AI ID ANCHOR THEREFOR Filed Feb. 16, 1945 INVENTOR. JOHN BKEYEK ATTORNEY.

Patented Feb. 12, 1946 UNITED; STATES PATENT" o-FFic-E' ARTIFICIAL TOOTH AND ANCHOR THEREFOR John Breyer, Brooklyn, N. Y.

Application February 16, 1945, Serial No. 578,248

3 Claims.

This invention relates to improvements in artificial teeth and anchors therefor.

This is a re-filed application of my previous apiii4c2ation, Serial Number 454,023, filed August The object of the invention is to combine the essential features of two types of teeth at present in use and known as the tube and pontic tooth. The invention provides a unique and substantial backing and anchorage for 'a tooth, is barely visible and requires little departure from the present way of constructing bridges or appliances.

Another object of the invention is to provide a tooth having the maximum porcelain tooth body for any requirement of an individual grinding without sacrificing the strength of the tooth and backing; and, at the same time, provides a simple and effective structure which can be inexpensively manufactured by modern machinery.

With the above and other objects in view, the invention consists of certain novel details of construction and combination of parts hereinafter fully described and claimed, it being understood that various modifications may be resorted to within the scope of the appended claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawing forming a part of this specification:

Fig. 1 is a rear elevation of a tooth having an anchor construction in accordance with the invention.

Fig. 2 is a side elevation of the tooth and anchor shown in Fig. 1.

Fig. 3 is a vertical sectional view of the tooth and anchor taken on the line 33 of Fig. 1.

Fig. 4 is a perspective view of the anchor.

Fig. 5 is a top plan view of the anchor as shown in Fig. 3.

Fig. 6 is a plan view of a plate showing the anchors as an integral part thereof, with the teeth attached.

Fig. 7 is a side view of a plate, partly broken away, showing the bi-cuspid replacement therein.

Referring now to the drawing, in which like characters of reference designate similar parts in the various views, the anchor comprises a standard or backing in the form of a blunt Y, the upper portion or fork ill of the standard or backing being curved and adapted to occupy a shallow groove formed in the cervical lingual area of a I tooth l l, the groove terminating behind the proximal contact of the tooth. The lower member or stem l3 of the standard or backing is curved transversely and lies in full contact with the tooth Within an extension M of the groove l2.

A curved anchor pin I5 is fixed in the center of the upper member of fork ID of the standard or backing and extends into the tooth, see Fig. 3. Both prongs of the upper Y or fork I0 have the same degree of curvature on top and bottom edges as that of the post, as clearly shown in Fig. 2 of the drawing.

The curvature of the post or anchor pin [5 in combination with the curvature of the prongs l0 and the stem I3 absorbs the stress of the tooth from every direction.

The present pin or post anchorages for artificial teeth are straight and vertical and have metal base beneath. V

The slight curved motion principle of the pin 15 does not require such base to bear against tissue in the tooth area. Care has to be. takento have post and upper backing member correspond to the same degree of curvature and have the recess in tooth body of sufficient depth and width to receive a backing strong enough to withstand the lateral and vertical masticating stress.

It is important that the groove in the tooth be of such character as to receive a standard or backing strong enough to carry and absorb the masticating stress without breakage, especially so if the tooth is to be used on a bridge where the units are connected on the upper portion or fork of the standard or backing. The groove has more width than the depth for the standard or backing so that stress transferred to the standard or backing will be met at a point offering the most resistance; that is, the vertical access of the standard or backing.

In Fig. 6 the plate I6 is formed integral with the stem l3 of the anchor. In Fig. 7 I have shown two bicuspid teeth I! replaced in the plate.

I claim:

1. An anchor for an artificial tooth, comprising a standard or backing in the form of a Y, the upper portion or fork of the standard or backing being curved and adapted to occupy a groove formed in the cervical margin of the tooth of less depth than the width of said upper portion and terminating behind the proximal contact of the tooth, the lower member or stem of the standard or backing being curved transversely and adapted to lie in an extension of the groove in full contact with the tooth, and a curved anchoring pin fixed in the center of the upper member or fork of the standard or backing adapted to extend into the tooth and having the same degree 2 1 of curvature onthe top and bottom edges as that of the groove. j V 2. In a tooth anchor, an approximately Y- Y shaped body having a pair of divering prongs and a stem extending longitudinally from the juncture of the prongs, the saidprongs having an arcuate transverse curvature and a longitudinal curvature in a direction opposed to that of the stem,

and an anchoringpin projecting from the medial, inner crotch portion of the body having a longitudinal curvature substantially corresponding to that of the prongs.

3. An anchor for artificial teeth, comprising an 7 approximately Y-shaped body having a pair of 7 into the tooth.

diverging prongs and a stem extending longitudinally from the juncture of the prongs, the said prongs having an arcuate transverse curvature JOHN BREYER.

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