US3305926A - Artificial dentures - Google Patents

Artificial dentures Download PDF

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Publication number
US3305926A
US3305926A US321118A US32111863A US3305926A US 3305926 A US3305926 A US 3305926A US 321118 A US321118 A US 321118A US 32111863 A US32111863 A US 32111863A US 3305926 A US3305926 A US 3305926A
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United States
Prior art keywords
groove
tooth
teeth
transverse
chewing
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Expired - Lifetime
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US321118A
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English (en)
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Gerber Albert
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Individual
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Individual
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/08—Artificial teeth; Making same
    • A61C13/097—Artificial teeth; Making same characterised by occlusal profiles, i.e. chewing contact surfaces
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same

Definitions

  • the artificial teeth also differ appreciably in regard of the relevant movement Characteristics of the -mastcation surfaces of the artificial teeth, according as the teeth are based upon this or that theory. Since the manufacturing laboratories or plants which produce artificial teeth are, as a rule, generally advised by persons specialised in the theories of -occlusion and articulation movements, the different artificial teeth can generally be easily distinguished from one another by the skilled person in view of the characteristic features, and insofar as such manufactures do not merely copy the purely anatomical shape of natural teeth. Generally it can be considered that in the formation of artificial chewing and gliding surfaces of posterior teeth three form-influencing factors are placed in the foreground by Specialists in prosthetic dentistry.
  • New shapes of artificial posterior teeth are developed for the upper jaw as well as the lower jaw which correspond to the features mentioned under items l to 4 and, at the same time, are constructed in proportions and chewing surface forms in such a manner that the usual assembly of eight teeth for the lower denture can be composed for special cases from only eight premolars. Since premolars are much smaller than molars, rows of Cheek teeth constructed -fr'om only such premolars can be inserted between tongue and Cheek for eifective function even with a shortage of space.
  • the present invention relates to an assembly of artificial posterior teeth characterized by the features that, for each pair of superirnposed arranged teeth, one such tooth possesses a chewing groove which is concave in transverse or cross-section as well as also in longitudinal section and the other tooth is provided with a corresponding cusp which cooperates with the chewing groove of the said one tooth and which is conveX in transverse or cross-section as Well as also in longitudinal section. Furthermore, the convex curvatures of the aforesaid protuberance have sharper curves than the concave curvatures of the chewing groove cooperating with the protuberance.
  • the deepest point of the chewing groove as viewed in transverse section is displaced towards the lingual side.
  • the function-al area of the :chewing surface Can be more easily located on the inner '(lingual) field of the alveolar ridges.
  • the invention also takes into Consideration the fact that the closing movement of the lower jaw is not always done with geometric precision.
  • the o cclusion or intercuspidation of the artificial teeth must include a degree of tolerance.
  • FIGURE 1 schematically illustrates a side view of the first upper and lower premolars designed according to the invention
  • FIGURE 2 is a side view of the second upper and lower premolars
  • FIGURE 3 is a side view of the first upper and lower molar
  • FIGURE 4 illustrates a front view of an upper and lower row of teeth constructed in the manner of the teeth depicted in FIGURES 1-3;
  • FIGURES Sa to 5C are front views of a first upper molar and first and second lower molars designed according to the invention and their cooperative relation for different positions of the jaw in gliding movements;
  • FIGURE 6 illustrates the right-side of a normal denture construction with two molars and two premolars arranged at the top and bottom;
  • FIGURE 7 illustrates a view similar to FIGURE 6 but with a lower ro-w of teeth incorporating four premolars.
  • FIGURE 1 there are illustrated a side view of the upper and lower first premolars.
  • the lower tooth 11 possesses a cutting edge-like cusp 12 which is in antagonism or counteraction with a concave chewing surface Zone or groove 13 of the upper tooth 14 and possessing large radus.
  • Reference numeral 15 generally depicts the tongue, whereas numeral 16 represents a portion of the false teeth plate.
  • FIGURE 2 there is illustrated a side view of the second premolars.
  • the cusp 18 of the upper tooth 17 situated towards the tongue 15 possesses a surface with a small radus of curvature and engages with a central chewing groove or furrow 19 of the lower second premolar 20.
  • the central chewing groove 19 exhibits a considerably larger radus of curvature than the cusp 18.
  • the protuberance 21 of the lower tooth possesses towards the side of the check a small flat or plane surface 22.
  • FIGURE 3 there are illustrated the first upper and lower molars.
  • the upper tooth 23 in this case also possesses a cusp 24 which engages With a chewing groove or furrow 25 of the lower tooth 26, wherein the radus of curvature of the chewing groove 25 is larger than that of the cusp 24.
  • the protuberance 24 of the upper tooth 23 in deviation from the natural model is here larger than the buccal cusps 27, 28 arranged behind one another, of which only the cusp 27 is visible in this figure.
  • the cusp 29 towards the side of the check 30 in deviation from the anatomical shape is constructed in reduced size and is provided with a pronounced inclined plane surface 31 which dreps-off buccally.
  • Analogous deviations from natural models Or patterns are applied also to the chewing surfaces of the second premolars and the second molars in the interest of improving the static and dynamics of the denture constructions.
  • FIGURE 4 there is illustrated a side View (next to the Cheek) of an upper and lower row of teeth provided with the teeth previously described in FIGURES 1-3.
  • the construction is maintained in accordance with a multiple mortar-pestle principle in that, in the lower row of teeth the chewing groove 25 of a forward tooth continues to a subsequently arranged inclined surface 32 of a rearward tooth.
  • FIGURES Sa to SC there is depicted the first upper molar an-d the first and second lower molars in side view for different positions of -the jaw.
  • the cusp 27 is disposed in the chewing groove 25 and the cusp 2'8 upon the inclined surface 32 of the neighboring tooth.
  • the cusp 28 glides from the inclined surface 32 of the rearward tooth into the chewing groove 25 of the forward tooth, as best seen by referring to FnIGURE Sb.
  • the lower jaw is moved forwardly or projected then the position indicated in FIGURE 5c is o-btained.
  • FIGUR-E 6 there is illustrated in side view the right-side denticulation for -a nor-mal construction with two premolars 33, 34 and two molars 35 arranged at the top and bottom.
  • FIGURE 7 the same right-side upper tooth row is illustrated in engagement with a lower row of teeth incorporating four premolars.
  • the first lower molar is replaced by a second right-side premolar 34 and a second left-side premolar36. In this combination there is not inserted a lower second molar.
  • the portion of the cusp surfaces cooperating with the chewing surface or groove is more sharply curved than the chewing surface or groove, producing a mortar and pestle effect.
  • the deepest part of the concave chewing surface or groove is shifted towards the ling-ual side of the molar or premolar.
  • a downwardly inclined planar surface 22 or 31 is located buccally.
  • the advanta-ge of the former is, as already remarked, that the functional area of -the chewing surface is more easily located on the lingual field of the alveolar ridges. The latter permits the food to slide down and off the surface and reduces the loading in the area of the ocelusion complex.
  • the chewing grooves or surfaces are concave in both longitudinal and transverse cross section.
  • a set of dentures including: first upper and lower premolar teeth, said upper premolar tooth having .a chewing groove concave in transverse and longitudinal section, said lower premolar tooth having a cooperating cusp convex in transverse and longitudinal section, said cusp bein-g more sha-rply curved over its surface that cooperates with the groove than said groove, and the deepest point of said groove in transverse section being displaced towards the lingual side of the tooth; second upper and lower premolar teeth, said lower premolar tooth hav- 'ing a chewing -groove concave in transverse and longitudinal section, said upper premolar tooth having a cooperating cusp conveX in transverse and longitudinal section, said cusp being more sharply curved over its surface that cooperates with the groove than said groove, and the deepest point of said groove in transverse section being displaced towards the lingual side of the tooth; first and second upper and lower molars, said upper molars each having at least two cusp
  • each of said first and second lower molar teeth a down- 10

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
US321118A 1962-11-09 1963-11-04 Artificial dentures Expired - Lifetime US3305926A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1315562A CH405601A (de) 1962-11-09 1962-11-09 Satz von künstlichen Backenzähnen für Zahnprothesen

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US3305926A true US3305926A (en) 1967-02-28

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US321118A Expired - Lifetime US3305926A (en) 1962-11-09 1963-11-04 Artificial dentures

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CH (1) CH405601A (de)
DE (1) DE1295130B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755898A (en) * 1971-12-02 1973-09-04 Dentsply Res & Dev Artificial posterior teeth
US4208794A (en) * 1976-10-12 1980-06-24 Dentalgerate "Condylator" Peter T. Gerber Set of artificial molar teeth
US5380203A (en) * 1994-01-24 1995-01-10 Moodley; Sundru M. Dentures and method of manufacturing same
US5501598A (en) * 1993-07-28 1996-03-26 Misch; Carl E. Dental tooth system
EP0956831A1 (de) 1998-05-15 1999-11-17 Max Bosshart Satz künstlicher Backenzähne für eine Zahnprothese

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19508762C1 (de) * 1995-03-10 1996-05-15 Ivoclar Ag Zahnsatz

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1963207A (en) * 1931-07-09 1934-06-19 Luthy Alfred Production of artificial teeth

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE463482C (de) * 1928-07-30 Hermann Schroeder Dr Kuenstlicher Zahn mit zugehoerigem kuenstlichen Gegenzahn
US2617192A (en) * 1949-07-15 1952-11-11 Goddard Hubert Axelander Artificial denture
DE868049C (de) * 1951-08-02 1953-02-23 Vita Zahnfabrik H Rauter O H G Kuenstlicher Unterkiefer-Backenzahn

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1963207A (en) * 1931-07-09 1934-06-19 Luthy Alfred Production of artificial teeth

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3755898A (en) * 1971-12-02 1973-09-04 Dentsply Res & Dev Artificial posterior teeth
US4208794A (en) * 1976-10-12 1980-06-24 Dentalgerate "Condylator" Peter T. Gerber Set of artificial molar teeth
US5501598A (en) * 1993-07-28 1996-03-26 Misch; Carl E. Dental tooth system
US5380203A (en) * 1994-01-24 1995-01-10 Moodley; Sundru M. Dentures and method of manufacturing same
WO1995019742A1 (en) * 1994-01-24 1995-07-27 Sundru Moodley Dentures and method of manufacturing same
EP0956831A1 (de) 1998-05-15 1999-11-17 Max Bosshart Satz künstlicher Backenzähne für eine Zahnprothese
US6273723B1 (en) 1998-05-15 2001-08-14 Max Bosshart Set of artificial molars for removable dentures

Also Published As

Publication number Publication date
DE1295130B (de) 1969-05-14
CH405601A (de) 1966-01-15

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