US677268A - Dental instrument. - Google Patents

Description

No. 677,268. Patented June 25, I90I. R. B. POWER.

DENTAL INSTRUMENT.

(Application:- filed Mgr. 16, 1901.)

(No Model.)

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ROSOOE ]3. POWER, OF GREENBAY, WISCONSIN.

DENTAL INSTRUMENT.

SPECIFICATION forming part of Letters Patent No. 677,268, dated June 25, 1901.

Application filed March 16, 1901. Serial No. 61,490. (No model.)

To aZZ whom it may concern.-

Be it known that I, ROSGOE l3. POWER, re siding at Greenbay, in the county of Brown and State of Wisconsin, have invented certain new and useful Improvements in Dental Instruments, of which the following is a specification, reference being had therein to the ac companying drawings.

This invention relates to instruments used for retaining the filling inteeth while the operation of tooth-filling is in progress.

The object of the invention is to produce an artificial wall surrounding a decayed tooth, against which wall a filling may be applied or built up, and which wall shall retain the fillin gin place until it is completely hardened.

Figure 1 is a plan of one of the metallic bands or walls which is used in my invention. Fig. 2 is a plan and an edge view of the auxiliary band or wall-piece. Fig. 3 is a perspective of the clamping-spring used to maintain the band or bands in place. Fig. 4 is a broken plan showing the forceps and clamping-wall as applied to a tooth. Fig. 5 is a sectional view of the wall applied to a tooth. Fig. 6 is a perspective, adjacent teeth being indicated by dotted lines.

The flexible Wall-piece A is made of thin pliable metal-such as gold, platinum, aluminum, or annealed iron or steel preferably plated with a non-oxidizable metal. This piece is not quite long enough to surround a tooth of ordinary size. Different pieces will be furnished to a set, the set usually comprising two or three pieces A dilfering in size. The ends of the pieces are rounded, and near each end and near the opposite sides of piece A there is a slot a, into which slot a springclamp O engages when the wall-piece is in position on the tooth.

The springclasp C is a strong metallic spring of horseshoe shape, having sharp ends 0, which are constructed to enter slots 0 Ct in the ends of the band A, as indicated in Figs. 4 and 5. The band A may be turned with either edge upward, and as holes CL are in somewhat diiferent relation to the edge of the band the reversal of position of the bands adapts it to different locations and different teeth.

The flexible wall-piece may be applied to a tooth in which the side wall is broken, and when the points 0 enter two of the holes in a band A the clasp will retain the wall-piece with great firmness. If the side of a tooth T be broken down, as indicated in Figs. 5 and 6, the wall A forms an abutment outside the carious place in the tooth, and a filling may be applied against the tooth and wall and retained in position until solidified.

In case there are cavities on both sides of the tooth, then the wall-pieces A and B may both be used. The piece B is substantially similar in material and outline to the piece A, but is shorter, and the ends are beveled to extreme thinness. The piece B need not have slots or perforations. The piece Ais applied to the tooth and held by clamp O, and the piece B is slipped inside thepiece A, so as to complete the wall about the tooth, as shown in Fig. 4.

By the use of not more than two strips A B of suitable length walls can be built about teeth and teeth filled of such character that without the wall it would be almost impossible to apply a filling. The wall relieves and supports the tooth during the application of the filling whether the same be a soft filling pressed to place or a metal filling made solid by a mallet.

The spring-clamp C may have openings 0 for the application of forceps D in usual manner for applying a tooth or dam clamp.

What I claim is- .1. The band or artificial Wall for dental matrix, of thin flexible metal,having rounded ends, and perforations at opposite sides or edges and near the ends, the perforations near one edge being nearer the ends than those near the other edge, whereby a clamp may engage one or the other set of holes, and thus the size of the encircling band or matrix be varied.

2. A dental matrix consisting essentially of a flexible metallic strip having slots near its ends and at opposite sides, and a spring-clasp of horseshoe shape having sharp ends to enter the slots in the flexible strip, said clasp having holes near its ends for the application of forceps, substantially as described.

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

ROSCOE B. POWER.

Witnesses:

-WM. Hoo F. E. HULBERT.

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