US655933A - Dental appliance. - Google Patents

Description

Patented Au I4, I900.

D. O. M. LE CRN.

DENTAL APPLIANCE. (Application filed Feb. 26, 1900.)

(No Model.)

NITED STATES PATENT OFFICE.

DANIEL 0. M. LE cnon, on sr. LOUIS, tirssoRi.

DENTAL APPLIANCE.

SPEGIFICATION forming part of Letters Patent No. 655,933, dated August 14,190). Application file-d eloruztry 26, 1900. Serial No. 6,579. (NO maeL) !Z0 CLZZ w7wm it may concern:

Be it known that I, DANIEL 0. M. LE CRON, a citizen of the United States, residing at No. 401 Union Trust Building, St. Louis, in the State of Missouri, have invented certain new and nseful Improvements in Dental Appliances; and I do declare the following to be afull, clear, and exact description of the invention,such as Will enable others skilled in the art to which it appertains to make and use the same, reierence being had to the accompanying drawings, and to the letters of reference marked thereon, wl1ich form a part of this specification.

This invention relates to dental appliances, and is directed to improvements in gages designed for use more especially in connection With the construction et artificial dentures,

the object of the invention being the production of a gage by Which artificial dentures and bridge-teeth may be readily and accurately fitted to and easily removed from natural roots.

In the application of artificial dentures of the kind specified a plurality of natural roots serve as the means by which the denture is removably secured in place, the roots being drilled to receive pins on the denture. To insure ready insertion and removal of the denturc, the pin holes orsockets in the roots must be parallel to each other and approximately at right angles to the inner side of the denture. Otherwise a slight deflection of even one of the sockets Will prevent the insertion of all of the pins, or, the pins being inserted, will,-

owing to the binding action of the defiected socket on its respective pin, prevent the ready removal of the denture. My improved appliance is designed to remedy this difiiculty, which is frequently met With in dental operations of the class referred to, the appliance or gage serving as an efficient means for ascertaining from time to time during the drillvatiOn, partly in section, of a dental gage em bodying my invention. Fig. 2 is a perspec tive view illustrating the application of the gage. Fig. 3 is a perspective view of a full upper denture, showing the means for attachare provided;with apertures registering With the root:sockets. One of the roots is shown With stich a cap, the same being lettered 50. The artificial denture is lettered A. At its upper side are receSses a a, conforming to the capped roots, and centrally of the recesses are pins a a, which enter the root-sockets and serve, with the latter, to hold the denture in place. To insure ready insertion and removal of the denture, the sockets, as before stated, must be at right angles to the denture. This is made possible by the use of my improved gage, the construction and operation of which I Will now describe.

The gag is preferably constructed, as shown, in sections B, B, and B one ct which, B or Bmay be dispensed With Where but three roots serve as the means by which the denture is held to place. The sections are each provided With a slot b, extending longitudinally preferably nearly the entire length of the section. The ends of the middle sec tion B lap the inner ends of the outer sections B 13 and threaded pins C 0 are passed through the slots of such lapped ends and serve, With binding-nuts d d at each side of the sections, to secure the parts in assembled condition and relatively-adjusted position. The upper end of each pin 0 is provided with a suitable handhold in the shape of a head 0, and its lower end cis Withot threads, being preferably slightly reduced in diameter. The outer sections B B are each provided near their outer end with a depending pin 6, formed rigid therewith.

In practice a suitable drill is employed to form the pin-sockets in the roots, and from The mots are shown as trimined to receive metallic caps, which time to time during the drilling operation the drill is withdrawn and my improved gage brought into use to ascertain the direction which the drill has taken. This is accomplished by 80 adjusting the sections as to bring the pins e and the pin ends a in line approximately with the root-centers and then by forcing a pin or pins into the respective partially-drilled socket or sockets, the diameter of the pins being such as Will cause them to fit the sockets rather closely. Should one or more of the sockets loe out of lime, the defiection is made apparent as soon as the gage is applied, and the degree of inclination being likewise ascertained it becomes an eS matter to determine to what extent the drill must be employed to straighten the deflected soCkt or sockets. This application of the gage is repated until the proper depth of socket is reached,after which the roots are capped and the necessary impression is made from Which t0 construct the denture.

The construction of the gage renders it uni- Versal so far as the range of adjustment is c0nerned, the slotted section permitting movement to vary the relative angles of the sections and also the distance of the pins from eaeh other t0 accommodate the gage t0 differently-located mots.

The gage may, as previously stated, be e1nployed regardless of the number of roots 1:0

which the denture is to be secured, thongh there must be a [lurality of such mots. The pins are parallel to each other and at right angles to the sections, and by the use of the gage exact conformation of the sockets to such pins may be produced; v

The gage isvery simple in Construction, may be Gheaply made, is very efficient in 0peration, and is not liable t0 disorder.

I claim as my inventionl. A dental gage for the purpose specified, comprising a frame made up of adjustable jointed sections, and gage pins on the frame certain of the pins forming the means for securing the sections together.

2. A dental gage for the purpose specified, comprising a frame made up of dettchble jointed sections, gage-pins on the frame certain of the pins f0tming With bindiig itS the means for Securing the sections together.

3. A dental gage for the pnrpose specified, comprising a frame made up of sl0ttd sections or members, fixed pins on certain 01: the sections, screW-threaded pins passd thro gh lapped ends of the sections, and bindigntS on the pins at each side of the sections.

In testimony Whereof I affix ni si nature in presence of two witnesses.

DANIEL 0. M. LE CRON.

VVitnesses:

W. T. NORTON, ARTHUR BROWNING.

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