US1439022A - Dental device - Google Patents

Description

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iillablt DELVAN W. QUILLNG, OF MINNEAPOLIS, MINNESOTA.

DENTAL DEVICE.

Application filed March 16, 1922. Serial lo. 544,075.

To all fr0/tom, 'it may concern.'

Be it known that I, DnLvAN W. QUILLING,

a citizen of the United States, residing at the cheeks and tongue of thel patient.` l

accomplishv the objects of my invention by providing forceps having cooperating grooves in the tips thereof for holding a. sprue. 'lhere are preferably two sets of these grooves, one set being, at a right angle to the length of the forceps, and the other set being at an obtuse angle. The sprue which is held in one or the other of these sets of grooves is thereby positioned so that it can readily reach any surface of any tooth. A tube for delivering a cooling jet is so positioned that the cooling medium will be directed upon the sprue for chilling the same. The nozzle of the tube carrying the cooling medium is preferably so positioned that the thickest part of the sprue which is, of course, the part carrying the most heat, is chilled first, thereby eliminating flaking at the place where the inlay model is engaged by the sprue.

'lhe full objects and advantages of my4 invention will `appear in` connection with the detailed description, and the novel features embodied in my inventive idea will be particularly pointed out in the claims.

ln the accompanying drawings, Fig. l is a side elevational view of the device. Fig. 2 is a similar view with portions broken away and showing` the manner in which a sprne is used. Fig. 3 is a top plan view. Fig. il is a fragmentary view corresponding to Fig. 2 but showing the sprue held at a different angle.

Referring to the construction shown 1n the drawings, the numerals l0 and l2 designate the two members of forceps which are connected to each other at the ends 14C adj as cent springlilre portions 416 and 18 as shown in Fig. A pin 2O secured to one of the members is received in a. hole in the other member in order that the two members may be kept properly positioned relatively to each other. The tips of the forceps are provided with two sets of grooves 22 and 24, the first set being right angularly disposed and the other set being disposed.r at an obtuse angle, whereby a sprue 26 may be held either in the position shown in F ig. 2 or in the position shown in Fig. 4. 'A syringe is associated with the forceps preferably in the following manner. A tube 28 is soldered along one of the members, asv the member 12, and this tube has a nozzle 30 positioned so as to deliver cooling medium such as water directly to the sprue 26 when the latter' after having been heated is pushed into a wax modell/V which is in the .cavity of a tooth T. The other end of the tube 28 is connected by a flexible tubing 32 with a. bulb 34; for forcing out the water.

The operation and advantages of my invention will now be apparent.` The instrument is held in one hand and after the pointed end of the sprue has been pushed into the wax model contained in the tooth cavity, water is applied to the sprue with the bulb held in the same hand, thereby chilling the sprue and ifridly fixing it to the wax model. The instrument also holds the sprue in the correct position for heating as well as in correct position for removal of the wax model from the tooth. The wax model can be removed from the tooth and carried to the base for investment without changing the grip on the forceps or removal of the hand from the :forceps until the 'wax model is firmly set for investment. During the entire operation, one hand of the operator is left free for duties furthering the convenience of the operation. Should the op erator desire to further burnish the wax model, it can be left in the tooth cavity with the sprue attached. At the ydesired time, the forceps can again be applied to the sprue and by pressure on the bulb, the entire margins of the model can be chilled and the model then removed. lf further trial is desirable, the model can again be carried to the tooth cavity and the same procedure carried out. T he advantages resulting from the use of my appliance may be summarized as -follows z l. llt eliminates the necessity of an asn sistant.

lt holds the sprue for heating.

Il. lt carries this sprue to correct pcsition. n i

4l. lt chills the sprue at the point of most heat first, thereby fixing the sprue to the model Without flaling.

5. lt permits removal of the model Without changing the grip of the hand.

G. The modelv can be carried to thelbase for mounting without change of grip.

7. The model can be replaced in the cavity for further burnishing if desired.

8. The model can then be" completely chilled before removing by further pressure on the bulb.l

v9. lt leaves one hand free duringthe entire procedure for holding either the tongue or cheeks or a mouth inirror.

l0. It eliminates danger of fracturing the margins of the Wax model.

l claim:

l. A dental appliance comprisingv a holder having provision for holding a sprue` at dif ferenty angles,A and means carried byy 'said holder for directing a cooling jetupon said sprue.

2. A dental appliance comprising a holder for holding a sprue, and means carried by said holder in such position as to direct a cooling jet upon the thickest portion of said sprue.

3. A dental appliance comprising forceps for holding a sprue, and means carried by said forceps for directing a cooling jet upon said sprue.

4. A dental appliance comprising forceps for holding ak sprue and a tube carried by saidV forceps, said tube having a nozzle for directing a cooling jet upon said sprue.

5. A dentalV appliance comprising forceps having grooves in the freeends thereof for.

7 A dental appliance comprising forceps.

for holding a sprue, a tube secured t one of the members of said forceps2 said tube having anozzle for directing a cooling jet upon the sprue, and a bulb connected With said tube.

In testimony whereof I hereunto ailix my signature.

DELVAN lV. QUILLING.

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