US1586912A

US1586912A - Ready-made dummy tooth

Info

Publication number: US1586912A
Application number: US756340A
Authority: US
Inventors: Harvey E Murphy
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-12-16
Filing date: 1924-12-16
Publication date: 1926-06-01
Anticipated expiration: 1943-06-01

Description

June 1 1926.

1,586,912 H. E. MURPHY READY MADE DUMMY TOOTH Filed Dec. 16, 1924 INVENTOR. #4014) If IVURPHY ,3? )g ATTORNEYS.

Patent-ed June 1, 1926,

unrrno stares tseaerz HARVEY E. MURPHY, OF MEDFORD, OREGON.

READY-MADE DUMMY TOOTH.

Application filed December 16, 1924. Serial No. 756,340.

The present invention relates to improvements in artificial teeth and has particular reference to a ready-made dummy tooth to be used as a bridge between two abutting I or adjacent teeth. a

It is particularly proposed in the present invention to allow bridge work to be done more economically, more sanitary and to allow ready-made dummy teeth to be pre- 10 pared in such a manner that they do not require any grinding or shaping on the part of the individual dentist so that the highly glazed surface given to the tooth by the manufacturer is maintained.

It is further proposed in the present invention to provide means whereby a dummy tooth may be readily anchored or secured to adjacent teeth without exposure to view of the gold or metal used as anchoring means. 2 In one form of my invention the metal will appear on the occlusal face of the tooth while in another modification even the occlusal face will be made of porcelain so that the tooth practically defies detection.

Further objects and advantages of my invention will appear as the specification proceeds.

The preferred forms of my invention are illustrated in the accompanying drawing, 30 in which- Figure 1 shows a longitudinal vertical section through my dummy tooth taken along line I-I of Figure 2.

Figure 2 an occlusal view of the tooth.

Figure 3 a transverse section taken along line III-III of Figure 2.

Figure 4 a transverse section similar to that of Figure 8 but of a slightly modified form.

Figure 5 a sectional view showing the dummy tooth anchored to two adjacent teeth, and

Figure 6 showing a similar assembly to that of Figure 5 in which a modified dummy tooth is used.

While I have shown only the preferred form of the invention, it should be understood that various changes or modifications may be made within the scope of the claims hereto attached without departing from the spirit of the invention.

Externally the tooth 1 is formed substantially in imitation of the tooth to be replaced and may present the general rounded surface shown in Figure 1, or the saddle shaped bottom 3 shown in Figure 4. The principal feature of the tooth which, according to my invention is made in the factory and highly finished, is the cavity or recess at formed in the occlusal face of the tooth 6 and extending into the same very deeply, the recess preferably being funnel shaped and presenting acurved bottom, as shown in the various views. In the wall 6 surrounding the recess two opposing notches 7 and 8 are formed, the two notches pointing toward the two adjacent teeth. In this form the dummy tooth is preferably sold in the market, it being the; intention that this simple form of tooth could be easily manufacturcd and sold in so many different shades and shapes that the dentist could always find a tooth that would fit his case p without having to grind the surface and thereby destroying its finish.

The recess is provided to give anchorage to a gold casting 9 made to exactly fit in therecess and to present two branches 11 and 12 in and extending through the two notches so that they may be used as a means for securing the dummy tooth to the adjacent teeth 13 and 14L, or to one of them, the latter teeth having preferably been previously provided with small anchored gold fillings 16 to which the ends of the branches 4 may be soldered.

This method of securing the dummy tooth to one or both of, the adjacent teeth allows the gold filling in the tooth to be hidden from view when looking at the tooth from the side, while the gold shows on the top or bottom face respectively. If it is desired to do still better work, the form shown in Figure 6 may be used, in which a preformed top 17 made of porcelain is furnished by the manufacturer with the tooth and in which the gold casting 18, while prepared in a manner similar to that shown in Figure 5, does not fill the tooth to its Wall so that in most cases practically no gold Whatever is visible to the eye.

I claim:

In combination, a ready-nude dummy 10 tooth of porcelain formed with a recess in the occlusal face and with notches in the mesial and distal Walls of the recess, a casting formed to fit in the recess and to extend through the notches for connection to adjacent teeth but made to allow the wall of the recess to extend above the same and a pie formed occlusal top of porcelain adapted for insertion in the recess above the casting.

HARVEY E. MURPHY.