US1501992A - Dental bridge - Google Patents

Description

E. H. GOERING DENTAL BRIDGE July '22 1924.

Filed March 5 1923 July 22, 1924.

ERNEST H. comma, or DULUTH, Minna.

DENTAL BRIDGE.

Application filed March 5, 1923. Serial No. 622,723.

To all whom it may concem:

Be it known that I, ERNEST H. Gonnmo, a citizen of the United States, residing at Duluth, in the county of Sta, Louis and State of Minnesota, have invented ertain new and useful Improvements in ental Bridges, of which the following is a specification, reference being had therein to theartificial tooth which may be readily fitted to the gums of the patient. 7 Other objects and advantages of the invention will appear in the further descri p tion thereof. a v I Referring to the accompanying drawing, forming part of this application and in which like reference characters indicate like Y parts I Figure 1 is a fragmental portion of a bridge embodying my invention;

Figure 2 is a'perspective view of one of the artificial teeth for the bridge;

Figaure 3 is a front elevation of Figure -2; an

Figure 4 is a side elevation of a tooth as applied to a section of the bridge.

The bridge is composed of a plurality of metal U-shaped tooth receiving members or cups 1, each being sufficiently arge to pref-' erably encompass approximately one-fourth of the external area of a tooth and applicable thereto from the inside thereof.

' Each. cup 1 is formed adjacent its root or gum edge with an inwardly projecting reinforcement or ridge, which is generally rectangular in cross section, the wall of the remainder of the cup being much thinner in construction but of such a shape externally as to conform with the shape of the artificial .tooth and being flush therewith when assembled.

The tooth 3 has a cut-away portion or recess near the free end thereof, said recess being stepped, forming a deeper portion thereof nearest the base of the tooth .indicated at 4 and into which the ridge 2 of the cup snugly fits. This deeper portion or channel 4: isformed at a decided angle to the axis of the tooth so that it inclines outwardly from the axis of the tooth towards the base thereof, so that when the tooth is removed or applied to the cup it is accomplished by an oblique motion, it being essential that the end walls of the cup reach to a point on the artificial tooth beyond the vertical axis thereof so as to insure against breakage when axial stress is putupon the tooth. I

From the above it is apparent that I have accomplished an exceedingly desirable union between the tooth and the bridge cup and one which during the process of 'masticat1ons is improved rather than being jeopard-- ized, as an axial thrust upon the tooth has a tendency to force it more tightly into the cup. The cups may be united as by soldering or the like, as at 5, as preferred in forming a bridge of an desired length and which may be supporte upon crowns forming naturalLteeth as is common, though such ing drawing. v

In this combinationof'bridge and artificial tooth it becomesex'ceptionally advans tageous to use a"-toothll1avin a fully formed root ti 6, and,- as itiaisapplied or removed from t e bridge by a semi-vertical motion, it becomes exceptlonally easy to fit same nealtly to the natural contour of the s by grinding off the tip to the desired orm.

By this means it becomes more practical to manufacture the artificial teeth with fully or abnormally extended root tips thus avoiding the necessity of applying backing thereto as is commonly practiced. The teeth are designed to be made of porcelain in the usual manner and permanently secured within the bridge by means of cement as is common.

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

1. The combination with a dental bridge having a metal tooth receiving cup, of an ref abutments are not shown in the accompany inwardly projecting inclined continuous.

E v neoneea 2. The combination with a dental. brid e overlapping engagement with the upper W having a tooth receiving cup, of inward y portion of the CUE. projecting means within said. cup, said In testimony w ereof I hereunto am my means being inclined downwardly towards signature in the presence of two witnesses.

the innermost front Wall of the cup, an artificial tooth having an inclined recess therev ERNEST H. GQERING. in for cooperative engagement with the in- Witnesses: wardly projecting means within the cup, S. C. Emerson,

and a stepped portion above said recess for S. Gno. S'rnvnns.

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