US1251912A - Removable denture. - Google Patents

Description

N. W. NORDSTROM.

REMOVABLE DENTURE, APPLICATION FILED NOV. 18. 1916.

Patented Jan. 1,1918;

may be as promptlydisengaged.

- TED sTATns A 1 'NILS w. NORDSTROM, or BROOKLYN, New. $011K.

n MovABLI: nENrURE.

and Stateof New York, have-invented certain new and useful Improvements in Removable Dentures, of which the following is a specification. 7

' This invention relates to improvements in dental bridgework, and more especially appertains to an improved construction of removable dentures.

One of the objects of the invention'is to produce a device of the character described including a strong and properly guided support for artificial teeth which shall he capable of self adjustment into its assigned position. 4

Another object is the provision of a device of the nature set forth embodying means for securely locking it to an adjacent receiving part without interfering withits self-adjusting features.- r

A further object is to provide a device of the species mentioned that canbe quickly applied to the receiving part and will readily find its bearing surface, from which it Other objects and advantages will become apparent as the specification proceeds.

With the aforesaid objects in view the invention consists of the improvements, novel construction, arrangements and combinations of parts hereinafter described, defined in the subjoined claims, and illustrated in their preferred embodiments by the annexed drawing,-wherein like elements are designated by the same reference characters throughout.

In the said drawing, which is made on an enlarged scale in order to illustrate clearly the invention in its minutest details Figure 1 is a top plan view of a lower denture with the invention applied thereto in the form of a double attachment replac ing four molars, that is, two on each side of the mouth, certain parts being shown in section and others inchanged positions;

Fig. 2 is a fragmentary side view ofthe rear portion of the denture the upper half of-Fig1 Fig. 3 is a sectional plan view representing a modified form of locking-element appearing cluded in the artificial denture;

Specification of Letters iatent.

W. NORDSTROM,

Fig. 4 is a right hand sideview of the FFEQ.

Patented J a 1, 1918. Application filed November 18, 1916. SerialNo. 132,094.

modified structure, as shown in Fig. 3; and I Fig. 6 is a detail view of a joint in the In these views, the reference letter Ade denture, shown on an enlarged scales notes a natural tooth,which is technically termed the second bicuspid and forms part of the denture on either side, as seen in Fig. 1. For purposes of the invention, this tooth is capped with a'crown B, which may be of gold'or some othersuitable material,'ce-. mented" on 1n accordance with approved practice. The crown B serves to hold in a,

substantially'vertical position a guide post 11,'connected therewith by'means of a rib or web 12, of less thickness, preferably at a point approximately i'nline with the inner.

faces of the molars to be replaced. 7 The reference numerals 15 and16 repreatthesurface of a saddle19, adapted to be cupied by the wisdom tooth, if the latter be'missing, as suggested in Fig. 1 or it may terminate at the wisdom tooth, fexistmg in the denture; The invention is of such character that it requires nosupport from Whether present or the latter-named tooth, absent. v

Forwardly of the said artificial molars is a pair of slide jaws 22, 23, arranged to embrace and surround the guide 11, from the:

side' opposite to'that of the rib 12. These jaws are preferably formed with a backing 24, attached to a box-like lining 25, which is made to cover the walls of a recess pror sent artificial molars,'shown in the lower" part of'Fig. 1, which are respectivelyembedded in recesses 17 and 18, indicated in the upper part of the same figure andprovidedf.

vided in the inner side of the saddle 19, for" a'purpose to be presently described. The recess having the box or lining25v is;

open on the inner side ofthealveolar'ridge andjis intersected in a vertical directionat its forward edge by theguide 11, previously mentioned. A lever 26, arranged to "swing in a horizontal position, is placed in this re cess and has a working fit in its said box'or" lining within which it is intermediately'fpiv ote'd by'means of "a vertically disposed" curved nose portion 29;;adapted toi'beswung into contact with the guide 11, in such a manner as to exert a binding or crowding pressure upon the latter when the said lever bears endwise th61 e011, "aS indicated' in the lower half of Fig. 1. \Vhen the lever is swung away or disengaged from the guide, its nose portionis received in an extension 30. of the box 25, as shown in the upperpart offthei said figure. Both ends of the lever, it will benoted, are shaped soas to conform with and closely following "the adjoining faces of the. box or lining, and thereby prevent entranceof particles. of food or matter into the sameu. The box or lining is conveniently set or molded intothe ma-. terial of which the saddle is composed, the latter being made.. preferably of guttapercha in the usual manner.

Fromthe foregoing it is apparent that the. saddle'bearing the artificial teeth engages thealveolar ridge independentlyv of the means for connectingit to the adjacent natural:tooth.. It is self-adjusting over the ridge both in a vertical=and in a horizontal direction and-the adjustment remains unaffected during mastication as the engaged parts 11 and 26 then: coact in'preventing the artificial portion of the denture from rising.

A short neck 31 is added to theoperating head 28: which is thereby offset. from the lever26 and the entrance to the recess where in the latter'is pivoted. The neck pro vides a space sufliciently wide for the 1nser-.

tion of a finger nail or. a tooth -pick or other suitable'instr'umentto pry the head 28 out and swing the lever on its pivot so asto.

force the -noseportion 29. away from1theguide post 11.

The forward artificialmolar 15 maybe grooved orrecessed as at 32, toaflord ready accesstothe' pivot pin 27 and permit withdrawal thereof by means of some suitable implement, to repair 1'01? renovate the same.

As shown in Figs. 3, 4 and 5, the guide post llis cutinto at 33,'in.order toproduce thereon a lateral seating. surface, adapted to be engaged by the nose .portion29 of the;

lever 26. -This prevents the attachment from being pulled off unlessthe head 28 is swung a considerable. distance-away from the box. The attachment: .thus. secured is .espe-v H ciallyfittedior inverted dentures, that, is,

such as .pertain' tothe'. upperjaw.

Fig.3 and 4 alsoshowthehea'd28.formed with ,a s'lo't.,or.ga.p 31?, instead ofbeing. ofiset. as ..before described-.1 Itis :understood .ofi course,.e.that.the'slot .or-;ga p provides. the. sp ce required. for thefreception of thepr b v mginstrument..-

. Where.artifiiahteetharesupplied;embothyj to the-bottom wall of the box 25,'and also enveloped by the rubber or other material of which the saddle 19 is made.

In a case, where a single artificial denture is required that is, at only one side of the mouth, thebar 34 can be of avery much shorter length, and its outer or free end may be anchoredto or around any one of the sound teeth, so as to prevent the saddle from working sidewise. Furthermore, the dental attachment hereinabovedescribed can be used for other-teeth than those exemplified in the accompanying drawing with? out sacrificing any ofv its principal advantages. V

While certain preferredembodiments of this device have been shown and described, it will be understood that changes in the form, arrangements, sizes, proportions and details thereof may be made without-departing from the scope of the invention as de-' fined by the appended claims.

Having described my invention what I desire to secure by Letters Patent and claim 1s 1. A dental attachment including a member applicable to the alveolar ridge in a vertical direction, a guide anchored to an adjacent tooth opposite one end of said member, means on the latterfor engaging said guide, and a fulcrumed binding element adapted to bear positively on the guide so as to hold the member away from said tooth.

2.1%. dental attachment including a member capable of self-adjustment upon the alsaid post from an adjacent tooth, a pair of aws at sa1d end of the member engaging opposite sides of said post, and a binding element arranged to bear positively on the latter oppositely to said jaws from the same end of the member.

8. A dental attachmentincluding a member overlying the alveolar ridge, means for anchoring said member to an adjacent tooth, a positively actuated binding element operating to press the member oppositely to said means,.and a brace extending past said tooth from the anchored end of the mem-,

ber-in. a direction opposite to said bindelement.

4:. A dental attachment including a meme ber..adaptedto overlie the alveolar; ridge and having 21. recess; above the latter, means for holding said .memberto amadjacent' tooth, a laterally open box in said recess, and a locking lever pivotally mounted in said boX in position for engagement With said anchoring means in a longitudinal direction.

5. A. dental attachment including a member fitted for superimposition upon the alveolar ridge, anchoring means disposed for vertical engagement between said member and an adjacent tooth, and a locking lever mounted to oscillate in a horizontal plane relatively to the member, one arm of said lever being adapted to exert an endvvise York this 14th day of November, A. D,

NILS W. NORDSTROM.

Witnesses:

H. C. KARLSON, FRED, A. KUNEMUND.

Copies of this patent may he obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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