US 1079540 A
Description (OCR text may contain errors)
G. W. CLAPI & E. S. ULSAVER.
DEVICE FOR USE IN CONNECTION WITH THE ARTIGULATION OF ARTIFICIAL TEETH.
APPLICATION FILED APR.4.1913.
1,079,540. Patented Nov. 25, 1913.
i To all 11:71 om may concern:
Be it known that we, mouse WY, CL-wr citizens of the l with the teeth of the other jaw, it is necesteet-hon the rubber ums Q 1 I or support in the arti-culato to insure the pro jcr level-or posttiou 9..-
. relatively work in an merit of the jaw,
occupy, teeth are to tures, said plate ,inost desirable to insure action of the :teeth when set up complete in UNITED STATES PATENT orrion.
GEORGE WOOD CLAPP DEVICE FOR USE IN CONNECTiON WITH TH and ERVIN' i.. United States, and residents of New Re chelle,county of lVestchcstcr,and State of New York, have invented an Improvement in Devices. for Use in Connection with the Articulation of Artificial Teeth, of which the following is a spec fication.
The object of our invention is to provide artificial plates tobe used in the act of c king dentures as a" guide iusettiug up e artificial tceth uponthe plate'which his the such artificialplates acting asa floor ULsAvnu,
the occlusal or grinding edges or surfaces of the teeth when being positioned on the rubber late.
The common assumption is, t at the teeth of the upper and lower sets may-be made to up and down movebutthis-is not natural and is not,'in the true sense, effective in masticating toodto fit itfor digestion, To enable the teeth of, one jaw to function properly sary to have contacting portions of the teeth soset thata side or grinding-,motion may be had by the jaw, without the-teeth interlocking to prevent such movement, or hc coniing-soiseparated during the side un veinentthat theirv grinding eihcieucyis reduced or lost. It is ditlicultto set the teeth to insure thisproper functioning in nastu-ution,
and it is to facilitate such arranging of the plates which fit the gums, that our improved artificialjpla'te is intend-- ed. The upper surface of said plate'hein'g so shaped as to correspond to the positions which the cusps of; the upper teeth should when both upper and ll; J8! be made, the lower teeth I then he placed in right relations to the upper teeth, and both sets will then etlectii'ely co operate in grinding tooth ably of, U'sl'ia'ped construction, adapted to be used in an articulator when making denhaving exposed curved surfaceswhich co nform to the curvatures found the best grinding Qur invention consists ofa plate, prefer-l said in -*.lination being,
the rubber plate for use in the inouthi" Our artificial plate is formed with predetermined curved surfaces'by tests I Specification of Letters Patent.-
, s."iu effect, a reverse curve,
uig thebl-ending ofi the two "endsf0f' 12.
upon separate skulls, l allows the upper central teethiowextend AND ERVXN S. ULSAVER, OF NEW! ROCHELLE, NEW YORK.
E ARTICULATION OF ARTIFIGIAL TEETH Patented Nov. 25, 1913. Applicatiqnfiled April 4,1913. ScrialNo.758,745.
from which curves are prepared and thelaw of averages determined.
Our invention will be better understood hv reference to the drawings, in which: Figure l is a iierspective view illustrating, our improved artificialplate separated from the articulator', Fig. 2 is a lan' v ew of the same; Fig. 3 is a front e e view;
and Fig. l is a side edge viewof the sarpe';
and Fig. 5 is a side elevation of the artichlflater with our irnproved artificial plate in p as used in sett ng upfthe artific al position teeth A I a 5 andfi arethe txvo parts of the usual ticulator whijelriis employed in setting up dentures. Arouncl the base portion' fi jbuilttup thefounclation land around the upper part 6, compositions f ofthese 'foundations heing usually of, plaster of Paris and warn As .ployed in the act of making a denture, in whiclrthe teeth 9 for the rubber late 8 of the upper jaw are being set up; an operation, our improved spend to the occlusal or grinding surfaces of theupper teeth or the jaw,the upper surfaces of said plate having'special curvatures to be later described} The said artificial plate may also he provided with projecting teeth or pumps 3 by which it may betas tuned on the wax or other foundation-n 'lhe artilicial plate 2 is preferably 'of ductile metal and of U-shapeiin plan, as shown in F 1 and 2, and has its: operis built the foundation T tlieiuwhich' I I artificial )l-ate'2 is arranged in position which won d "'corre-.
. shown in Fig. '0, the articulator sb'e ng'em ative Slll'ftlCGfOllUtld with curvaturesflwhich 1 are ore fully disclosed in a re p: teristie curt Figs. 3 aud t. ticularlv' describing the characatures or the operati've surface of the artificial plate, with-reference "to the plate correa what is shown, namely, I spending to the lower teeth, the extreme front portion 11 is made withinclined'surfaces 12. extending forward and downward, with respect to the the plate. -:Furthermore, the rear arms 10, of theplate are curvcd laterally inward and downward and at. the intermediate portions 13, there t same b ,qcnera'l plane of into the forwardend -ofthe-Sid portions ll), of the plate; The inclined portioniim down slightly below the level of the laterals I are determined y the curves of this plate and the natural lateral motion is given to the jaw in chewing, the'upper teeth will function with the'lower teeth in the most effective manner to enable the grinding operation to take place between all the bicuspids and molars on one side and with out interlocking of the incisors or front teeth.
Where the artificial plates are to be em ployed in. the setting up of dentures for hot the upper and lower sets 'of teeth, to
. be used together, there would be no restriction in providing proper curves to the surfaces of the lates; and in these cases, the most scientilih manner of arranging the curves is resorted to, the same being by duplicating the curves found in the grinding or ccclusal surfaces of the best specimens of natural teeth. This information has been obtained by examining many skulls 'containing the best specimens of natural teeth, and the character* of the curves so provided hasbeeri studied, and the law of averages drtw'mined. The curves so determined and plotted are duplicated in the operating surfaces of our improved artificial plate, the curves in said portions of the plate being made to correspond to the average curves aerived from-the curves taken from numerc-us examples of actual teeth, as thus above stated. It will of the operative or fies-posed surfaces of the plate containing curved portions is most important, while the under surface is immaterial.
The forming of the plate of relatively thin metal is illustrated in the drawings, though we do not confine ourselves to any particular shape for the under surfaces, nor to any particular manner of attaching the saigplate to the built up form or foundation up which it sets. That the purpose of providing this described curvature to the artificial plate and then setting the teeth to correspond to, the said curvature, may be 'readily, understood, the following'explanaion is given: When the natural teeth of 0th jaws are all present, and their osition" is perfect, portions of teeth "of J 0th sides of t'he jaw are in contact at the same time during the act of 'masticating or chew- ,ing; that 1s, ,i;a;1nbrsel'of food is between .the back teeth" of the right side, the lower aw is thrown ,to the right before it combe understood that the shape mences the grinding motion, and it grinds the food by first coming up into contact with the upper teeth and then sliding back to the middle position. At the same time,
the back teeth of the other side of the mouth,
-be done only by setting the grinding surfaces of the teeth to have the same inclinations that had been present in the natural teeth. As this inclination varies with each tooth, there has been a great deal of difliculty in properly positioning artificial teeth in the rubber plate to insure their'proper functioning, in use. The present methods in .use involve a great deal of trouble and expenditure of time to determine the position to be given to each of the artificial teeth, and frequently the setting is unsatisfactory because of 'the failure of correctness in such positioning.
Our improved artificial plate is intended to obviate these difiieulties to the present methods of of our plate is to serve two main purposes, namely: The outer boundary, when the plate is looked upon from above, determines the outline to which the teeth should be set so that the outer edges of the teeth in each case just come to the edge of the plate. The different curves in the plate surface represent the difierent inclinations of the grinding surfaces of the teeth to secure the very best results by the patient! If the upper teeth are set so that all occlusal or grinding parts of the teeth touch the plate, the teeth will he in proper position to give the patient the very best possible service. In practice, artificial plates of this character will be provided in various sizes for the dentist and from which he may select as occasion may require, to fit jaws of different sizes. In those cases where the teeth remaining in the patients head are of such character as to prevent the use.of the plate unchanged, the plate may be modified or shaped by bending or filing as may be necessary to overcome any particular specificdifiiculty which may arise. Moreover, it is evident, that while our improved artipositioning teeth and the object ficial plate is more accurate in defining the L in new sets are best arrangements of artificial teeth plates,' where both upper and lower to be made for the plate, namely, that ofthe lower ,jaw as shown in the drawing, would suffice for both sets, because if the upper set were made same patient, a single in U form and thin,
to conform to this plate, the lower set may be subsequently made to function prop.- l erly with the upper set previously built, and in this way a single artificial plate of our invention may he sufficient in pre paring both sets of teeth. If, however. only an upper set of teeth is required. then the artificial plate corresponding to the grind- I ing or oeclusal surfaces of the teeth of the lower jaw should he provided for use on? the articulator; and likewise. when the lower t teeth are to he made then an articulatorf plate of our invention ma he provided to correspond tothe. grinding or occlusal surfaces of the teeth of the upper jaw. in these latter cases, however. should the natural predetcrmintal and most desirahte curvatures found as herein stated. not properly conform to the remaining teeth in the paticnfs jaws. then the metal should he tnoditied as to its curved surfaces to enahle a set. of artificial teeth to he produced to prop erl y 'fuu ti-h with these remaining in thel patients mouth. whatever the ondition of] these teeth may he. While we have shown our improved plate hecause it is lighter and more easil hent when necessary in adapting it for use. it will he evident that this particular renun'al of the metal in the middle 5 part is a matter of imm.-iterialit when coul sidering the in\ention in its hroadest cnsc. and while we prefer the construction of the plate shown, we do not restrict ourselves to the minor details thereof. as these may he modified without departing from the spiritll l of the invention.
in this applica ion we do not. claim the nu-thed" of setting, up dentures in an al" ticulat r, as that will form suhject matter; of a separate application. a division of this appli ation.
Having now descrihed our invention.what. we claim as new and desire to secure by Letters latent. is: I
l. .\n artitici .1 plate for use in setting up dentures, having, a hody providing an operative surface upon which the teeth of the denture are to he set up and by which they are tnisitioncd vertically and in inclination. said surface made with curvatures forming undulations lying in vertical planes and also providing inclined surfaces to horizontal planes. which are inverse or complementary to the curvaturcs and inclinations to he given to the oct-lusal or grinding surfaces and edges of the teeth of the completed denture or set of teeth thus hein; set up.
2. An artificial plate for use in setting up dentures. having a hotly provided with an operative surface upon which the teeth of the denture to he made are to he set up and hy which they are positioned vertically, said surface made with curvatures talten from the a verag 'e curves derived from curves of the occlIn-al or grinding surfaces of a plurality of ditl'ercnt jaws.
.n artiti ial plate for use in setting up dentures. consisting of a plate of hard material and said plate shaped to present curved portions disposed over its surface to correspond to the points or cusps of the oct Iusal or grinding surfaces of the artificial set of teeth to he produced as the result of setting up the denture upon the said plate. 4. .\n artificial plate for use in setting up dentures. consisting of a plate of hard material and said plate shapedtopresentcurved pertions disposed over its surface to corregpolttl to the points or cusps of the occlusal or grindine sulfaccsv of the artificial set of teeth to he produced as the result of setting up the denture upon the said plate,comhined with an articulator havine a foundation upon which the. artiticial plate is attached.
In testimony of which invention, we hereunto set our hands.
GEORGE \\'()()l) CLAPI. ERVIN b. ULS \VElt. Witnesses:
\V. F. Davis.