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Publication numberUS636568 A
Publication typeGrant
Publication dateNov 7, 1899
Filing dateDec 2, 1898
Priority dateDec 2, 1898
Publication numberUS 636568 A, US 636568A, US-A-636568, US636568 A, US636568A
InventorsLewis S Seeley
Original AssigneeLewis S Seeley
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 636568 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

. No. 636,568. Patented Nov. 7, I899.


(Application filed Dec. 2, 1898.)




SPECIFICATION forming part of Letters Patent No. 636,568, dated November 7, 1899.

Application filed December 2, 1898.

To all whom it may concern:

Be it known that I, LEWIS S. SEELEY, a citizen of the United States, and a resident of the city of New York, in the county and State of New York,have invented certain new and useful Improvements in Artificial Tooth-Crowns, of which the following is a specification.

The invention relates more especially, to that class of crowns which are fitted and attached to a natural root. i

The objects are to so construct the shank or pin with which the crown is provided as to afford a better meansthan heretofore for securing the crown to the root, the shank also being adaptable to a double as well as a tooth having only one root.

To these endsthe invention consists in the construction, as hereinafter more fully described, and pointed out or indicated in and by the claim.

In the drawings, Figure 1 is an enlarged sectional View of a tooth-crown, the shank, and a root, to which it is secured by cement or filling. Fig. 2 is an enlarged section of a crown and of the shank, with separated ends of the wire or strip of metal bent at an angle to the shank. Fig. 3 is an enlarged sectional View of a crown and the shank, which is here baked therein in the usual manner.

shown as being spread or shaped to extend across the cavity in the root and brace the shank against the sides thereof when attaching the crown. In these several figures the end of the shank is shown as being tapered, while in Fig. 4, which is an enlarged view of the shank alone, no point or tapering is shown at the return-bend or end of the shank.

In the drawings, A represents the crown, which may bemade of porcelain or plastic material. The upper end a of the shank B is inserted in the material while plastic and The shank is made of a strip of metal or wire, which is doubled so that the return-bend 1) forms the end. The metal strips or wire may be round, fiat, or angular, but I prefer the latter, and they are usually of platinum or platino-iridium, though any 'othersuitable metal may be used. The two parts are brought close to each other at or near the return-bend or end I) of the shank, thus allowing a taper and even a point to be made at the extremity which extends deepest into the canal of the root 0 of the natural tooth. This taper or point may be made either at the time of manufacture or when the crown is being fitted to Serial No. 698,118. (No model.)

the root on which it is to be secured.- If the tooth has a double root, the return-bend may be cut or filed so as to allow of a separation of the parts of the shank, which, being spread,

will form two shanks one for each root. A space a is left between the two parts after leaving the return-bend, so as to admit the cement or filling, which will form, as it were, a bridge or solid mass across the canal of the root. This, together with the hold which the cement takes on the walls of the root, will se cure the crown more firmly than where dependence is placed entirely upon screwthreads, flanges, or other conformations on the exterior of the shank.

The doubled metal strip or wire of which the shank is formed is capable of being spread to extend across the cavity in the root, bracing the shank against the sides thereof and leaving an enlarged opening (1 between the strips, which will be filled with the cement. Such adjustment and bracing of the shank holds the crown steady while thevcement is hardening or until it is set, and also makes the crown much more firm, so that mastication of food is less liable to jar or loosen the shank by a continued use of the tooth thus repaired. Moreover, a crown provided with a shank formed of a doubled strip or wire such as I have shown and described is simple in construction and cheap to manufacture, in which pered shank formed of a single wire, the two lengths of which are spaced apart and converged at their outer connected ends and baked with the crown at their inner ends; whereby the shank will conform to an ordinary tapered tooth-cavity, or may be bulged outwardly to conform to the cavity of differ- IOO ent shape or may be divided at its outer extremity or point to form two prongs for a dou ble cavity, substantially as set forth.

. LEWIS S. SEELEY. Witnesses:


Referenced by
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US4224692 *Jun 1, 1978Sep 30, 1980Sundberg CorporationFreight handling glove
US4990090 *Jul 30, 1990Feb 5, 1991Roane James BEndodontic post construction
US5277583 *Aug 2, 1991Jan 11, 1994Wellesley Research Associates, Inc.Dental post
US5342200 *Jun 10, 1992Aug 30, 1994Chalifoux Paul RDental post and bur construction
US5362237 *Jun 11, 1993Nov 8, 1994Wellesley Research Associates, Inc.Dental post construction
US5915970 *May 20, 1997Jun 29, 1999Tru-Flex Post Systems, Inc.Flexible post in a dental post and core system
US5919044 *Nov 28, 1997Jul 6, 1999Tru-Flex Post Systems, Inc.Flexible post in a dental post and core system
US6371763 *Apr 21, 1999Apr 16, 2002Robert J. Sicurelli, Jr.Flexible post in a dental post and core system
US20020123023 *Nov 21, 2001Sep 5, 2002Sicurelli Robert J.Flexible post in a dental post and core system
WO1995012363A1 *Nov 4, 1993May 11, 1995Wellesley Research Associates, Inc.Dental post
Cooperative ClassificationA61C13/30