US1117276A - Method for taking partial impressions for artificial dentures. - Google Patents

Description

S. G. SUPPLEE. METHOD FOR TAKING PARTIAL IMPRESSIONS FOR ARTIFICIAL DENTURES. APPLICATION IILED APR. 23. 1914.

1,117,276, Patented Nov. 17,1914.

THE NORRIS PETERS CO.. PHOTU-LITHO.. WA SHINGTON. DI C.

SAMUEL G. SUPPLEE, OF EAST ORANGE, NEW JERSEY.

METHOD non TAKING PARTIAL IMPRESSIONS For; ARTIFICIAL nnivrunns.

Specification of Letters Patent.

Application filed April 23, 1914. Serial No. 833,838.

To all whom it may concern:

Be it known that I, SAMUEL G. SUPPLEE, a citizen of the United States, residing at East Orange, Essex county, New Jersey, have invented certain new and useful Improvements in Methods for Taking Partial Impressions for Artificial Dentures, of which the f0llowing is a full, clear, and exact description.

My invention relates to an improved method for making impressions for s0-called partial artificial dentures.

In the accompanying drawing I have shown a preferred means employed in practising my improved method and have illustrated certain steps, in which drawing Figure l is a perspective view of an impression tray. Fig. 2 is a similar view of the same tray with the impression partially made. Fig. 3 is a view of a piece of impression material. Fig. 4: is a plan view of the finished impression. Fig. 5 is a cross-section on the line 55 Fig. l. Figs. 6 and 7 illustrate different forms of trays that may be employed in the practice of my improved method.

This improved method relates only to taking impressions where some of the natural teeth remain, and in the accompanying drawings I have illustrated the steps practised in a case where several of the front teeth only remain. To begin with, I employ a tray of special construction in which 1 is the main body. 2 is a continuous inner flange. 33 are side flanges spaced apart and leaving an opening at the front where the front teeth are present. 4 is a handle projecting forwardly from the main body of the tray.

I first place in the tray a proper amount of modeling material 5 made plastic by heat. I then place this in the mouth and force it into approximate position. I then draw the tray forwardly so as to cause the plastic impression material to conform accurately to the lingual side of the teeth and the adjacent tissues, portions of the material conforming to the spaces between the teeth on the lingual side. Then by massaging the cheeks, the material adjacent to the flanges 3-3 is conformed accurately to the buccal side of the ridge and adjacent tissues, where teeth are missing. The material is then allowed to partially set, and then the cup and material are removed from the mouth, being withdrawn in the general direction that the finished plate would be removed. The ma terial and cup are then dipped'in cold water and quickly placed back into the mouth and forced into position with firm pressure. The advantage of this removing of the partial impression is to cause the material to draw or drag at the spaces which present bell-shape portions of the teeth. By dipping, the semi-warm material in cold water, a thin film, or shell, similar to a matrix is formed on the surface of the materialso that when the material is placed back into the mouth and forced down into position,

the material will not again flow underneath the bell-shaped portion of the standing teeth, but will make a correct impression of only such portions of the teeth as are necessary in the finished denture. This step is important and makes it possible for a denture to be made and fitted in the mouth without the necessary or customary method of filing to fit. The object of this initial impression is to secure only the lingual portion of the standing teeth. This partial impression can be added to and changed to conform to the tissue when the mouth is closed, or nearly so, as existing conditions will permit.

When the partial impression is finished and removed, all points adjacent to teeth are out to right angles, or definite edges, exposing the buccal or labial and portions of the mesial and distal surface of the teeth. This partial impression is then again replaced in the mouth and following this I take another piece of impression material 6 (see Fig. 3) and force it into the position shown in Figs. at and 5, this portion of material being conformed to the buccal side of the teeth and adjacent ridge, and the material being forced toward the teeth so as to fill in the spaces between the teeth and conform accurately thereto, thus completing the impression. When this added material is partially set, it is removed and treated as previously described in connection with the formation of the first partial impression.

By the use of this method of taking an impression, it makes it possible in many cases to have a patient bite on the top of the cup and at the same time secure the bite or relative positions of the opposite jaw on extra modeling compound placed on the back of the cup, or, in the case of a dentureless opposing jaw, it is possible to take an impression of the same by the use of modeling com- Patented Nov. 17, 1914.

vol

pound and get the correct apposition, or relations of the jaw, so that the two dentures may be made at one and the same time.

What I claim is:

1. The improved method of making partial artificial dentures comprising first conforming a piece of plastic impression mate rial to the inner side of the alveolar ridge and part of the outer side thereof including lingual and occlusal surfaces of standing teeth, then conforming a piece of plastic impression material to the balance of the outer side of said ridge and teeth to thereby complete both the external and internal impression.

2. The method of making impressions for artificial dentures comprising first placing a piece of impression material in a suitable holder, then forcing said material into intimate contact with the ridge and teeth of Which the impression is to be made, then drawing said holder and material forwardly to force the impression material into still more intimate contact With the lingual side of the teeth, then allowing said material to partially set, then Withdrawing said holder and material and dipping in cold Water to chill the surface of the material, then reapplying under pressure said partially formed impression, and finally applying additional impression material to the outer surface of the ridge and teeth Where teeth are present to complete the impression.

SAML. G. SUPPLEE.

"Witnesses E. E. Mouse, R. G. MITCHELL.

(Jopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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