US1930887A

US1930887A - Dental crown gauge

Info

Publication number: US1930887A
Application number: US635080A
Authority: US
Inventors: William L Stansbury
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-09-27
Filing date: 1932-09-27
Publication date: 1933-10-17
Anticipated expiration: 1950-10-17

Description

w. L. STANSBURY 0,887

DENTAL CROWN GAUGE Oct. 17, 1933.

2 Sheets-Sheet 1 Filed Sept. 27, 1932 .75 1 j z 49 Ag 79 Inventor Q By @MMM. f1 Home y UNFTED STATES new Patented Oct. 17, 1933 issues? 1,930,887 DENTAL CROWN GAUGE William L. Stansbury, Mountain View, Calif.

Application September 27, 1932' Serial No. 635,080

4 Claims.

This invention relates to a gauge especially adapted for the accurate holding and fitting of dental crowns and inlays, whether of gold, porcelain or other material and consists in the provision of a positively-and micrometrically adjustable gauge to secure firmly plaster cast or models of the patients dental formation, while fitting thereto dental crowns and/or inlays of gold, porcelain or other material; and to provide for accurate micrometric adjustment of the crown or inlay being so formed.

The invention together with its numerous objects and advantages will be best understood from a study of the following description taken in connection with the accompanying drawings Where- Figure 1 is a front elevational view of the gauge.

Figure 2 is a top plan view thereof. a

- Figure 3 is an end elevational View.

Figure 4 is a vertical transverse sectional view therethrough.

Figure 5 is a perspective view of a supporting plate.

igure 6 is a perspective view of a slidable plate.

Figure 7 is a'perspective view of a perforated plate forming part of the invention, and

Figure 8 is aperspective' view of a ferrule or holder forming part of the invention.

Referring more in detail to the drawings it will be seen that the device consists, in its preferred form, of an oblong plate 10 of wood, metal or other suitable material having secured to its front side at 11 a channeled block 12 disposed intermediate the ends of the plate 10 and having its sides formed with internal grooves 13.

On the rear face thereof adjacent the lower edge of the block, said block 10 is provided with a longitudinal mortise tongue 14. At said lower edge said block 10 adjacent each end thereof is provided with a tongue 15.

Adjustably associated with the plate 10 is a pair of

sliding plates

16, 17. As shown in Figure 6 each of the

plates

16, 17 is substantially L-shape and includes a main horizontal or body portion 18 provided adjacent one edge with a standing or fiange portion 19 provided with a mortise groove 2! receiving the l tise tongue 14, while at the junction of the par Us 18, 19 there is provided on each of the plates l6, 17 a groove 21 to accommo- 0 date a tongue 15. I

The vertical or flange part 19 of each

plate

16, 17 at one end edge thereof is provided with a right anguiarly disposed projection 22 having threadediy engaged therewith an adjusting screw 23 which has one end thereof adapted to engage the adjacent end edge of the plate 16 to facilitate the adjustment of the plate.

The part 18 of each of the

plates

16, 17 is adapted to have detachably secured to the under side thereof a perforated plate 24, through the medium of screws 25.

Adjacent its lower edge, and on the front face thereof plate 10 is also provided with scales 26 to insure accurate adjustments of the plates 16, 17in a manner thought apparent.

A ferrule or holder designated generally-by the reference character 27 comprises a body or block like portion 27a arranged for sliding movement within the channel of the plate 12 and having tongue 27?) adapted to engage the grooves j 13 whereby the member 27 is constrained to shift longitudinally of the channel of member 12. Engaged with the plate 14) and member 12 is an adjusting screw 28that is adapted to bite against theblock 27a for securing the member 27 at the desired adjustment as will be clear from a study of Figure 4.

Member 27 also includes a ferrule likeportion 270 having an opening 29 therethrough, opening 29 being substantially oval. shapedin cross sec- 80. tion. Forthe opening 29 there is provideda sleeve like lining 30 of metal or other suitable material having its upper end swaged as at 30'. Then the sleeve 32 may be suitably packed with plaster paris or other plastic material 31. In this connection it is to be noted that the tapered oval shaped hole in the f rrule portion 27:: is so shaped as to permit of the tooth model 33 in engagement with. said ferrule like portion on several different occasions in a manner to insure 90, that a subsequent positioning of the model will conform in every respect to a previous position of the model when so engaged with the holder.

As set forth in the statement of the invention, the purpose of this gauge is to enable the dentist to accurately build and fit dental crowns and inlays of any material, that is to say, crowns or inlays of gold, porcelain or other similar material from which such crowns or inlays are made.

In the present instance I have shown the device when making and fitting a sleeve crown. In use, the dentist first procures a model of the patients the present instance the upper jaw and divides the model as shown in the drawings into two sections, such sections of the model in the present instance being designated by the

reference characters

32, 32a. The model will of course, and as shown, not include a replica of the patients tooth to be treated or the portion of the gum associated with such tooth. The

sections

32, 32a are suitably associated with the perforated plates 24 which in turn are secured in a manner hereinbefore set forth to the parts 18 of the plates 16, 1'7, and the plates slidably arranged on the plate 10 are then adjusted relative to one another to position the teeth on the confronting ends of the

sections

32, 32a the proper distance apart. The distance separating said teeth will of course depend upon the relative position of the teeth of the patient. A model 33 of plaster paris or the like is then made of the tooth to be treated, and the proper end of this model is then embedded in the material 31, after which the member 27 is properly adjusted vertically to dispose the lower end of the model 33 in proper position between the teeth of the

sections

32, 32a in the manner shown in Figure l. The crown to be placed on the patients tooth is then fashioned on the lower end of the model 33, and when completed, the crown designated generally by the reference character '24 will be of the proper size and can then be readily fitted to the tooth of the patient undergoing treatment.

From the foregoing it will be seen that I have thus devised a simple and economical device whereby a dental inlay or crown maybe readily formed and cast to the desired size of a particu lar tooth.

Even though I have herein shown and described the preferred embodiment of the invention, it is to be understood that the same is susceptible of further changes, modifications and improvements coming within the scope of the appended claims.

Having thus described my invention, what I claim as new is:

1. A device for use in building and fitting dental crowns and inlays, comprising a base plate, a pair of plates on the base plate and arranged to shift longitudinally thereof relative to one another, means on the last named plates for securing sections of a dental model thereto, and a holder slidably mounted on the base plate for movement at right angles to the plane of travel of said pair of plates, and provided with means for securing a tooth model in operative position to the above mentioned sections of a dental model.

2. In a device of the character described, a base plate, a pair of plates arranged adjacent one edge of the base plate, inter-engaging means on the base plate and on each plate of said pair for securing the latter plates at the desired adjustment, a dental model having sections secured to the plates ofsaid pair, a holder member movable in a plane at right angles to said pair of plates, inter-engaging means on said holder member and said base plate for securing the holder member at the desired adjustment, and 'a tooth model carried by said holder member.

3. A device for building and fitting dental crowns and inlays comprising a base plate, supporting plates mounted on the base plate longitudinally thereof, a holder device for a tooth model mounted on the base plate for sliding movement transversely thereof, scale means on the base plate to assist in the accurate adjustment of the supporting plates, perforated plates detachably mounted on the supporting plates and serving as means for anchoring the sections of a dental model to said supporting plate for movement therewith, and said model tooth holder including a part having an aperture therethrough and a plastic material arranged in the aperture and into which one end of the model tooth is to beembedded.

4. In a device of the character described, a base plate, a pair of model carrying plates slidably mounted on the base plate for movement in the same plane longitudinally of the base plate, sections of a dental model secured to said movable plates, a block mounted on said base plate for movement in .a plane at right angles to mid movable plates, and a tooth model holder carried by said block, together with a tooth model in .said holder and having an end arranged for disposition between the confronting ends of the model sections carried by said movable plates and aiso formed for the application thereto of a dental crown.

. WILLIAM L. STANSBURY.