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Publication numberUS965246 A
Publication typeGrant
Publication dateJul 26, 1910
Filing dateDec 3, 1909
Priority dateDec 3, 1909
Publication numberUS 965246 A, US 965246A, US-A-965246, US965246 A, US965246A
InventorsGeorge E Stallman
Original AssigneeGeorge E Stallman
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 965246 A
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Description  (OCR text may contain errors)




Patented July 26, 1910.

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Specification of Letters Patent.

Patented July 26, 1910.

To all whom it may concern:

Be it known that I, GEORGE E. STALLMAN, a citizen of the United States, residing at Fort Sam Houston, in the county of Bexar and State of Texas, have invented certain new and useful Improvements in Teeth, of which the following is a specification.

My invention relates to new and useful improvements in means for attaching artificial pin crowns to the roots of teeth.

My invention comprises essentially a metal casing, which may preferably be made of copper and which accurately fits the pin of a crown. It is to be understood that the pin attached to the crown may be round, square or any desired shape in crosssection, and the metal casing will be formed round or square to accurately fit the pin. The metal casing may be rigidly secured to the pin of a crown or may be securely anchored in the root-canal, as will be hereinafter explained.

In the accompanying drawings, forming a part of this specification and in which like numerals are used to designate like parts through the same, Figure 1 is a vertical sectional view of a pin-crown, provided with my improved casing. Fig. 2 is a central vertical sectional view of a root and crown, showing the means for securing the crown to the root. Fig. 4 is a perspective view of the metal casing with a disk of gold, amalgam or porcelain attached to its lower end by a process known to those skilled in the art of dentistry. Fig. 3 is a perspective view of the root showing the metal casing and disk cemented to the same, and showing the crown and pin removed.

In the drawings illustrating the preferred embodiment of my invention, 5 designates a pin of an artificial crown, said pin being baked into the porcelain 6, as is well known in the manufacture of artificial pin-crowns.

7 designates an open ended substantially cylindrical thin metal casing, surrounding the pin 5 and which is removable from and frictionally held upon the pin 5. The casing 7 is provided at its lower end with a plurality of openings 8, which are stamped in the casing 7 when the same is slipped off of the pin 5. The openings 8 are preferably stamped from within outwardly and have outer flared or flanged edges, which engage material attached to the casing in the process of its construction, and also serves the purpose of providing means whereby said casing may be withdrawn from the canal cavity, by the insertion of a proper instrument within one of the openings 8.

By particular reference to Fig. 2, it will be seen that 9 designates theroot of a tooth having the usual canal cavity 10. The metal casing 7 containing the pin 5 is arranged within the canal cavity 10, the casing 7 being provided with a plurality of openings 11 upon its periphery and near the upper end thereof, which openings cooperate with a suitable form of cement within the canal cavity, for holding the casing 7 within the root.

12 designates a gold disk commonly used in the art of dentistry, which is molded and attached to the lower end of the metal casing 7. The disk 12 is shaped to accurately fit the lower end of the root 9 and also the abutting end of the porcelain 6.

Fig. 4 shows the metal casing 7 with the gold disk 12 securely attached thereto, with the openings 11 stamped at its upper end.

These openings are easily stamped in the casing before cementing said casing in the canal cavity 10.

Fig. 8 shows the casing and disk sepa rated from the pin 5. In Fig. 3, also is shown the metal casing 7 with the disk 12 attached thereto, said casing being cemented in the canal cavity 10, and the crown 6 with pin 5 drawn out of the casing 7. By this construction therefore, I am able to remove the crown from the root 9 by withdrawing the frictionally engaged pin 5 out of the metal casing 7, after said casing has been anchored within the canal cavity 10. It is obvious by reference to Fig. 3, that the withdrawal of the pin 5 from the casing 7 will then form a canal leading to the end of the root, thus affording access to the same in cases where it is desired to treat the root. In case the withdrawal of the pin 5 is not desired, the attachment shown in Fig. t is stamped with openings 11 and secured to the pin 5 by means of a suitable cement. The crown with the casing cemented thereto is then secured in the canal cavity 10 by means of a suitable cement, in which case the crown and easing are rigidly secured to the root and cannot be removed therefrom. Also in the process of construction a piece of carbon is fitted in the metal casing in order to I open-ended 7 near its lower end with a plurality of openings, of a cap mounted and adapted to conform to the shape of the end of said root, and a pin fixedly mounted upon a crown and adapted for insertion within said casing.

In testimony whereof I aflix my signature 20 in presence of two witnesses.



upon said casing 15

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3629943 *Jul 13, 1970Dec 28, 1971Whaledent IncDental prosthetic assembly
US4253835 *Oct 1, 1979Mar 3, 1981Mike Z. NemethyPost and sleeve arrangement
US4443192 *May 24, 1982Apr 17, 1984Herman BlitzDowel pins
US4480997 *Jan 4, 1984Nov 6, 1984Deutsch Allan SDental post and wrench therefor and method of restoring bulk to a tooth root therewith
US4622012 *Mar 27, 1985Nov 11, 1986Smoler Lewis SDental post system
US5073112 *Nov 8, 1990Dec 17, 1991Coltene/WhaledentActive/passive dental posts
US5284443 *Aug 28, 1992Feb 8, 1994Coltene/Whaledent, Inc.Method of forming dental restorations
USRE31948 *Jan 18, 1985Jul 16, 1985 Dental post and wrench therefor and method of restoring bulk to a tooth root therewith
Cooperative ClassificationA61C13/30