US989246A - Artificial tooth. - Google Patents

Description

H. A. GOLLOBIN & N. A. BORNSTEIN. ARTIFICIAL TOOTH. APPLICATION FILED JAN. 21, 1910.

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UNITED STATESWIATENT OFFICE.

HARRY A. GOLLOBIN AND NEWTON A. BORNSTEIN, OF NEWARK, NEW JERSEY, ASSIGN- ORS TO THE DENTAL DENTURE IMPROVEMENT COMPANY, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY.

ARTIFICIAL TOOTH.

To all whom it may concern:

Be it known that we, HARRY A. GoLLoeIN, a subject of the Russian Empire, and New- TON A. BORNSTEIN, a citizen of the United States, and residents of Newark, in the county of Essex and State of New Jersey, have invented a new and useful Improvement in Artificial Teeth, of which the following is a specification.

Our invention relates to improvements in artificial teeth and more particularly to the shape of the tooth crown and to the shape of the pin receiving hole whereby a better fit may be obtained between the tooth crown and the part to which it is to be applied and in which the strength of the tooth crown is materially increased both by its shape and by the shape of the pin receiving hole.

A practical embodiment of this invention .is represented in the accompanying drawings, in which- Figure 1 is a plan view of one form of tooth crown, Fig. 2 is a side view of the same, Fig. 3 is a front view, Fig. 4 is a section taken in the plane of the line A-A of Fig. 1, looking in the direction of the arrows, Fig. 5 is a section taken in the plane of the line 13-13 of Fig. 4, looking in the direction of the arrows, Fig. 6 is a side view of another form of tooth crown, and Fig. 7 is a central section from front to rear through the same.

The pin receiving hole 1 of the tooth crown is tapered, in the present instance conical, thus permitting the bottom of the hole to be brought down toward the incisal edge 2 of the tooth crown a suflicient distance to give the hole an extended pin receiving surface without danger of weakening the labial wall 3 or the lingual wall 4 of the tooth crown opposite the bottom of the hole as is the case where the hole is made of the same diameter throughout or where its bottom is enlarged, as is common. I

A seat 5, 6, is provided at the mouth of the pin receiving hole 1 in the base of the tooth crown, and the base of the tooth crown is made concave, as shown at 7 the bottom of the cavity reaching to the mouth of the pin receiving hole 1 thus dividing the seat 5, 6, at the mouth of the said hole and fur- Specification of Letters Patent.

Application filed January 21, 1910.

Patented Apr. 11, 1911. Serial No. 539,398.

nishing an uninterrupted wall between the mouth of the hole and the side walls of the tooth crown. The lingual wall 4 of the crown, at the base thereof, is provided with a curved seat 8 for the reception of an offset portion on the base of the backing for the tooth crown, not shown herein. In some instances, the labial recession .of the gum is greater than the lingual recession. The crown which we have shown herein has its labial wall extended farther beyond the mouth of the pin receiving hole than the lingual wall so as to render the crown particularly well adapted for use where the labial recession is greater than the lingual recession.

Parts shown and described but not claimed herein form subject-matter of our co-pending applications filed of even date herewith, Serial Nos. 539,397 and 539,399.

WVhat we claim is:-

1. An artificial tooth crown having a tapered pin receiving hole extending from its base toward its incisal edge, the lingual wall of the crown at the base thereof being provided with a curved seat upon the outer edge for the reception of an offset portion on the base of the backing for the tooth crown.

2. An artificial tooth crown having a tapered pin receiving hole extending from its base toward its incisal edge, and a seat at the mouth of the pin receiving hole, the base of the tooth crown being concave, the bottom of the concavity extending to the mouth of the hole for dividing the seat to furnish an uninterrupted wall between the mouth of the hole and the side walls of the tooth crown, the lingual wall at the base of the crown being provided with a curved seat for the reception of the offset portion on the base of the backing for the tooth crown.

In testimony, that we claim the foregoing as our invention, we have signed our names in presence of two witnesses, this 14th day of January, 1910:

HARRY A. GOLLOBIN. NEWVTON A. BORNSTEIN. WVitnesses:

F. Gnonon BARRY, O. S. SUNDGREN.

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

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