US 888071 A
Abstract available in
Claims available in
Description (OCR text may contain errors)
No. 888,071. PATENTED MAY 19, 1908.
E. W. DUDEZ.
DENTAL GROWN HEATER.
APPLICATION FILED JULY 8,1907- fE- F2 TTORNEY.
, nu: Npnms PITIRS Cm, wumuamu. n. c
EDWARD W. DODEZ, OF FORT WAYNE, INDIANA.
Specification of Letters Patent.
Patented May 19, 1908.
Application filed July 8, 1907. Serial No. 382,795.
To all whom it may concern:
Be it known that I, EDWARD W. Donnz, a citizen of the United States, residing at Fort Wayne, in the county of Allen and State of Indiana, have invented certain new and useful Improvements in Crown-Heaters, of which the following is a specification.
This invention relates to apparatus by which tooth crowns, bridges, inlays, or similar dental structures, may be heated for the purposes of properly placing the same on the teeth roots, or for removing the same from the teeth roots after having been placed thereon.
In practice the tooth root is suitably prepared for the particular structure designed to be placed on it, such as, for example, a gold crown. In order that the crown may be held tight in place it is customary to use a plastic, adhesive medium such as various forms of cement, one such cement being now known to the trade as onilite. hen this cement hardens or sets the crown is, of course, fixed in the position in which it is at the time of that hardening or setting of the cement. It is often the case that this cement sets before the crown is in its proper position on the root. It then becomes necessary to soften or render plastic the cement so that the crown may be properly adjusted and pressed on the root. It is also often desirable to remove a crown or other dental structure from a tooth which has been theretofore cemented thereon, and to accomplish that it is also necessary to soften the adhesive medium so that the crown may be freed from its position on the root.
It is desirable in apparatus of this class that the instrument shall enable the operator to apply a uniform heat to the crown and at the same time enable him to use it for pressing the crown to its proper position, and the object of my invention is to provide apparatus which will very effectively furnish those desirable features.
My invention consists in the novel features of construction hereinafter set forth and shown in the drawings.
Referring to the drawings Figure 1 is a plan view of one embodiment of my invention; Fig. 2, a longitudinal elevation of the same, and Figs. 3, 4, 5 and 6, modifications of the same.
Referring to Figs. 1 and 2, I provide a metallic body or bulb 2 with a suitable handle 3. I prefer to make the bulb of harddrawn copper, as that metal is very quickly heated and rapidly gives of] its heat. I prefer to give the body or bulb 2 the form of a cylinder in its lower portion, at least, and in the bottom of which is fitted the handle 3. The upper face of the bulb is slightly rounded and is provided with lateral grooves 4. The purpose of these grooves is to enable the operator to get the bulb as closely as possible in contact with the crown to be heated, the grooves being adapted to engage the rough or grinding surface of the crown, thus permitting the indented portions of that surface on crowns on the molar teeth to receive the heat as well as the other portions. The up per face of the bulb, in other words, is pro vided with a configuration similar to that of the molar teeth of the human mouth.
In practice, after heating this copper bulb to the desired temperature, the upper face is brought into contact with the rough or grinding surface of the crown, the grooves of the bulb engaging the uneven portions of the crown; the latter is heated thereby, the adhesive medium softens and the crown may then be easily withdrawn from the tooth root, or pressed with the assistance of the bulb into its proper position on the tooth root, in case the cement has hardened before the crown is in its proper place on that root.
It is apparent that numerous modifications of the bulb will be possible. In Figs. 3 and 4 I show one such modification, in which I have formed the bulb so as to be used in heating a crown on a bicuspid or premolar tooth. The bulb in this case is given the configuration of the cusp of such a crowntapered toward the top (or cone shaped), with two opposite sides 5 and 6 flattened. This construction permits the peak of the bulb to enter between the cusps of the crown thereby heating that portion of the same in such manner that the crown may easily be removed or pressed into proper position.
Another modification is shown in Fig. 5, in which I provide a bulb with a configuration such that it will fit over crowns placed on the incisor or canine teeth. The bulb in this case is provided with a groove 7, said groove being large enough to permit the bulb to engage both sides of the crown in order that Vided with a configuration adapted to engage the latter shall be heated uniformly on both acorresponding configuration on a tooth its front and back sides. crown for the uses and purposes described.
In each case described the bulb is pro- In witness whereof I hereunto subscribe 5 vided with a heating surface whose configmy name in the presence of two witnesses.
uration is similar to and adapted to en 'a e the surface of the crown to be heated. D C l EDNARD DODEZ' WVhat Iclairn is: Witnesses:
ISAAC N. TAYLOR, 4 ELWIN M. I-IULsE.
In a dental crown heater a metallic bulb 10 having in its upper portion a surface pro-