Патент USA US2406208код для вставки
Aug. 20, 1946. R. w. ERDLE , 2,406,208 CERAMIC ARTICLE AND MATERIAL AND METHOD V FOR COLORING’ OR SHADING THE SAME Filed March 4, >1944 ' f f @a . ' . v INVENTOR. ‘_/ïeL'IZer WE/‘dlâ BY \ ' @n Patented Aug. 20, 1946 2,406,208 ¿Jy-¿UNITED STATES PATENT oFFlci1§:f_ß¿l CERAMIC METHOD'ARTICLE FOR COLORING AND MATERIAL VOR SHADING THE SAME -j . `,Reiner W.v Erdle, Chicago, Ill., assignor to Dental ' ' ‘- ` Research Corporation, Chicago, Ill., a corpora tion of Illinois Application March 4, 1944, seriai No. 525,012 ' 9 claims. (c1. szf-s) . This invention relates, in'general, to ceramic 2 will runtogether in the tooth mold, and the por celain tooth so produced will have substantially articles and Amaterial and meth'od for producing the same, and has particular relation to an im proved material and method for producing differ one color. This, of course, is undesirable. In handling two or more porcelain mixes which ent shades or colorsalong different portions of suchY articles and to the articles .thus produced. While the invention is particularly adapted for have~ different colors, considerable time is con sumed,ïand the results .depend uponlthe skill of, the operator.- Teeth are produced in` this mail producing lfrom a singleporcelain mixvcommer ner in different dental> laboratories throughout cial Aru'ns of artificial teeth ; having uniformly the country and in other countries. They .have throughout therun `of teeth'Í different shades 10 to match a standardor given shade guide, and.y along different portions of such teeth accurately because the resulting shading of aV tooth depends to rmatch a standard ,shade guide or the natural to a large extent on the skill ofthe operator it teeth, it is tobe understood that the invention, in its broader aspects, is not limited v4to this par ticular> use butfmay beemployed‘in all similar 15 ` Work-for example, ,.for-~ producing «different shades or colors along different portions of other ceramic articles. ' ` Heretofore, in order to produce diiferentsh'ades has been difficult to obtain reasonably accurate matches of manufactured teeth with a standard or given shade guide. One of the main objects of the present inven tion is to overcome the difñculties above set forth and other difficulties-previously encountered in the production of , porcelainteeth. Another object of the invention is to provide ` in different parts of an artiñcial tooth, porcelainsy of differentv -colors were manufactured. „These for automatically shading a tooth correctly, thereby raising the standard of the teeth. 'Another object of the invention is to provide for producing a tooth with its parts of different porcelain powders of diiferent colors were mixed with distilled water, or other suitable binders, into separate porcelain mixes, one for each color. The lighter color porcelain mix and a definite 25 shades from a singleporcelain mix, thereby re amount of it was placed ,in the tooth cavity of ducing the labor cost and eliminating any error the mold. Through gravity or vibration, for ex an operator may make in handling »two or more ample, in the Imanner set forthV and claimed in different colored porcelain mixes toiill the tooth- > my prior U. S. Patent No. 2,196,258, issued April , 9, 1940, this porcelain mix would ñow to the lower 30 mold cavity. Another object of the invention is'to provide part of the mold cavity and form'the incisal part an improved tooth porcelain and an’ improved tooth porcelain mix; also an improved method for assuring a better shading'of thev porcelain tooth, was then introduced into >the mold cavity, teeth and that the different shades in diii‘erent and finally a third color porcelain mix, having parts of each tooth of a commercial run of teeth ¿ th‘e color of the gingival part of the tooth, was will uniformly and accurately match a standard introduced into the mold cavity. or given shade guide'. It was not always necessary to use three dif Further objects and advantages of the inven ferent colored porcelain mixes `to produce a tooth having the deiinite shades along different 40 tion will be apparent from the following detailed description, taken in connection with the accom parts thereof. It was found that by carefully of the tooth. 'I‘he second color mix ofv porcelain, having the color ofl the middle section of the mixing the colored porcelain powders, two difier panying drawing. ent colored porcelain mixes could be used to pro duce a porcelain tooth oi"y a given shade. In the drawing: Y Figure 1 is a micro enlargement showing a typ ` In order to produce a given shade in a porcelain 45 ical section of a porcelain powder embodying ther tooth with two or more different colored porce- . present invention; lains, th'e operator must exercise extreme >care to put the proper amount ofthe different colored porcelain mixes intothe tooth mold. l The time Figure 2 shows, more or less diagrammatically, a mold having a tooth cavity filled With thesin element is also ofgreat importance. If 1to0 much time elapsesbetween the filling operations of the different porcelain colors, a >sharp line will ap-` pear on the tooth, caused by the different colored » l gle lporcelain mix of lthe present invention; and 50 Figure 3 is an enlarged perspective View of a tooth formed according to the present invention. Referring, in general, to the more or less 'dia grammatic illustrations-inthe drawing, I provide, porcelain mixes.v If there is insuflicient time be-' according tothe `present invention, a new and tween the filling operations, th'e porcelain Icolors 55 improved porcelain which may be referred to as 2,406,208 3 Y plural mix porcelains previouslyV employed. . As shown diagrammatically in Figure 1, this - i new and' improved porcelain has relatively coarse ‘f porcelain particles I0 made of a lighter shade Ol ferent colors or shades in the different parts of the tooth. porcelain having, for example, the color of the incisalpart of the tooth. It also has finer porce-> lain particles I I, and still finer porcelain particles `ing of colors so that the resulting tooth Willfol- Y I2. The particles II, which are of a grain size», of the middle part of the tooth. f The particlesÍIZ; ' low the shade of natural teeth. i After `the„.tooth, as shown at I1 in Figure 3, . .Y is removed from the mold I4, it may be dried and iire-hardened~~and- glazed as more fully disclosed infrny4k previously` mentioned U. S. Patent No. of next smaller grain size, are made of a still darker shade, having the color,v of', the ginrgival -part of the tooth. 22,196,258.A Y,'I‘hepor’celain tooth I1 selected for illustrationgisfananterior tooth, but, of course, The porcelain particles Il), II, and'IZ, of dif(-` this may vary. The >incisal Vpart I9 of the tooth vI-'I Vis «formedf by the -coarserV grain particles III having, the color of the incisal shade of the tooth.-y _ The middle rpart 2D of .the tooth is’formed by the next i'lner particles VIIhaving the‘color, of ,_ ' ferent colors or shadesanddifferent grain sizes,A y and in predetermined amountsfare vmixed~vtof gether to produce a single porcelain powder hav-` ing all of the colors or shades required in a porce- ^ lain tooth; The finer porcelain particles will ñll ' Y in the spaces between the Acoarser particles to produce an accurate and uniform overall blend nextsmaller than thegrain size of the particles blé), are made of a darker shade, having thecolor ` 4 ner the correctly colored porcelain particles pack into the proper parts of the mold cavity I3 to produce by the different settling or packing char acteristics of the different size particles the díf Y1 a “single mix porcelain,”jto distinguish from the The single: porcelain, mix is pro duced byV thoroughly mixing this mixturev of'por-` Vthe middle part‘of the tooth.r The'gingivalfpartV 2| is formed bythe next finer particles I2 hav-> ‘ celain particles Iß;> II, and I2 With a definite ing'the color of the gingivalipart of thertoothl. amount of distilled water,‘or other suitable bind ' From the foregoing description it will now be er, _to produce asingle Vporcelain. mix of the de- ~ apparent that the use'of the single mix porceäV sired. consistency` and having all ofthe required lain has the advantage ofrautomatically'shad- f colors‘or shades in thesingleporcelain mix.V la toothcorrectly, thereby> raisingr the stand The tooth cavity I3*- of the vmold isthenfilled Y . ing ard of >teeth producedv according to thel present VvvithLtl'iissingle porcelain'mix, as shown at |75, ` , thus introducing all’o'f the representative lots of l:n invention. The lillinggofthe tooth moldcavity IS'ninvolves thevvhandlingV of ’onlyV one porcelain porcelain particles'fIß, II, and I2 into the cavity; mix,I which reduces considerably the labor,` cost I3 ‘completely to?lll the'same in a Single opera for `producing, porcelainL teethkgThe use*V of the tionA and without successively introducing porce single’mix porcelain elimìn'ates'also anyY error lainmixes of different colors into different parts of the mold cavity, as heretofore required. VThe 35 anfoperator may makeby handling two or more l different coloredY porcelains to1 filla tooth mold porcelain mix I5 is introduced'into the mold cav cavity. ityfIâ'While all of the various porcelain particles As a result, I 'secure' better shading-1er' » coloring of the tooth, >and I assure uniform and accurate lmatching of all teeth of a given com IIJ, II, andv I2 are in complete suspension in the „ binder. This assures the desired' shading of the tooth, and also assures that the different shades 40 mercial runof teeth With‘a lstandard or given indifferentjparts of eachtooth of a commercial run ofteeth will accurately and uniformly match, for example, `a standard or givenshade- guide. All of the porcelain- particles III', II', andY I2 ‘ shadey guide. . . If. desired, some of the; porcelain particles Il) may. beuncolored and other of Asuch particles II),V may be colored to’shade theincisal part of the of different colors and different grain sizes may f, tooth by ablending ofthe colored and uncol ored porcelain. Likewise, some of the porcelain be kept in complete suspension during introduce` particles IIV and/0r some of the particles l2 may tionv ofv the single porcelain» mix intov the mold cavity ' I3 i and up to that time, for'example, byV be uncolored and .otherî of " such particle'smay >be the.Y method and means disclosed. and claimed in my copending application Serial No. 522,706', filed gingivalparts by ablending of these colored and Y February' 17,' 1944, ' ~ ' ‘The moldV Ill'may bea flexible mold of the ' characterdescribed and claimed inv my prior U. S. PatentNo. 2,337,636', issued December 21, 1943', although, of course, this may varyyvvith-in the » scopev of the present invention. Upon filling‘the mold'cavity-I3 with thefsin gle porcelain mix, the mold I4 and porcelain mix I5 in the cavity I3 thereof" are vibrated, for ex ample,y as morel fully' described and claimed in my- prior'U. S., Patent No. 2,196,258», issued -April 9, 1940; Vibrating means for this purpose is shown more ori-ess diagrammatically at» I6.' The particular manner in which thedesiredvibration `is-secured, and the particular form of the vibrat ing means may, of course, vary widely. A The diiîerent size porcelain particles II), I I, and colored’ to’shade thetoothY alongl its middle and uncolored porcelain particles. ‘ One suitable porcelain for purposesV of the present inventionis composed of. minerals and mainly of nepheline. syenite, as more fully de_-v scribed in. my prior U.V S. PatentNo. 2,334,319, issued November 16, 1943.Y This particular. mate, rial is referred to for purposes'ofiillu'stration, it being understood' that'other ceramic materials and like materials’may .bev employedr within the scope ofthe broaderaspects ofthe present,in‘-i vention. d . ì y l VI have described‘thej invention in connection With the details vof a particular embodiment, but Ido not rintend thereby` to limit the. inven'tion‘tol such details, nornd'o I intend'to be'limited to‘thel particular embodiment and relation". ofifthezes sential features shown and described."l ‘ ’ ' I2 have different'settling characteristics. The 1. VA unitary dental porcelain mix comprising aparticles Ill, vWhichare coarser or of larger grain size, .will settle atonce to the bottom of the mold 70 liquid binder `and differentially ground particles of vporcelaininitially, andprior togrinding; off cavityA I3. The next nner particles Il settle over different colors and in which the differentially the coarser particles Iû, and where particles I2 of'aY third grain size are employed, as described, thesestill ñner particles I2 settle over the par ticles I I of intermediate grain size. ' In this man.-` ground porcelain particles ’initially ofïdilîerent' colors'> are combined in proportionsadaptedto produce by thev differentsettling., characteristics 2,406,208 5 of the different size particles a predetermined shaded coloring effect in an article formed of snchmix. 2. An improved dental porcelain mix ccmpris~ ing a liquid binder having mixed therewith rela tively coarse porcelain particles colored to pro duce the desired color along the incisal portion of a tooth, liner particles of the same porcelain material but of a different color to produce a different color along the middle third of the tooth, and still nner particles of the same porce lain material but of a still different color to produce a further color along the gingival por tion of the tooth. 3. As a new article of manufacture, a ceramic ` article having different colored or shaded por tions with relatively coarse and colored or shaded ceramic particles forming one of the colored or shaded portions of the article and finer ceramic particles cfa different color or shade forming another portion of the article. 4. As a new article of manufacture, a porcelain tooth having different shades along diiferent por tions thereof with one portion formed of rela tively coarse porcelain particles shaded to pro- -> duce the desired shade along said portion and another portion formed of nner porcelain par ticles of a different shade to produce a different shade along said other portion of the tooth. 5. As a new article of manufacture, a porce 6 'tooth having an incisal portion formed of rela tively coarse porcelain particles shaded to pro duce the desired shade along the incisal portion, a middle third portion formed of nner porcelain particles shaded to produce a different shade along said portion, and a gingival portion formed of a still finer porcelain ‘particles shaded to pro duce a still differentshade along the gingival por tion of the tooth. . . 7. As a new article of manufacture, a ceramic article having a shaded coloring effect with relatively >coarsely ground ceramic particles ini tially, and prior to grinding, of one color forming one of the »colored portions of the article, and relatively iinely ground particles initially, and prior to grinding, of a different color forming another portion of the article. Y 8. As a new article of manufacture, a porcelain tooth having an incisal portion formed of rela tively coarsely ground porcelain particles ini tially, and prior to grinding, of a relatively lighter color to produce the desired color along the in cisal portion of the tooth, and a gingival por tion formed of relatively finer ground porcelain particles initially, and prior to grinding, of a relatively darker color to produce a different color along .the gingival por-tion c-f the tooth. 9. A unitary ground porcelain material com prising differentially ground particles of porce lain initially, and prior to grinding, of dineren-t lain tooth having an incisal portion formed of relatively coarse porcelain particles shaded to produce the desired shade along the` incisal por tion and a gingival portion formed of nner por colors and in which the differentially ground por celain particles initially of different colors are celain particles colored or shaded to produce a . ferent siZe particles a predetermined shaded col oring effect in an article formed of the material. different shade along the gingival portion of the tooth. 6. As a new article of manufacture, a porcelain comloined4 in proportions adapted to produce by the different settling characteristics of the dif REDIER W. ERDLE.