US3466751A - Root-pin for model-teeth - Google Patents

Root-pin for model-teeth Download PDF

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Publication number
US3466751A
US3466751A US658789A US3466751DA US3466751A US 3466751 A US3466751 A US 3466751A US 658789 A US658789 A US 658789A US 3466751D A US3466751D A US 3466751DA US 3466751 A US3466751 A US 3466751A
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United States
Prior art keywords
root
pin
frustum
hollow space
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US658789A
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English (en)
Inventor
Willy Kleiner
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Individual
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Individual
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Filing date
Publication date
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Publication of US3466751A publication Critical patent/US3466751A/en
Anticipated expiration legal-status Critical
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/002—Means or methods for correctly replacing a dental model, e.g. dowel pins; Dowel pin positioning means or methods
    • 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
    • A61C13/225—Fastening prostheses in the mouth
    • A61C13/30—Fastening of peg-teeth in the mouth

Definitions

  • a root-pin defined by a frustum, a central hollow space and an annular external groove adjacent a large end of the frustum.
  • a fiat exterior surface is positioned adjacent the smaller end of the frustum and parallel to an axis thereof.
  • This invention relates to a root-pin for a model-tooth die, which pin can be adopted as a help when making indirect inlays, cast crowns, bridges, cast clamps, etc.
  • root-pins made of synthetic material have recently been created of hollow shape and square shaped.
  • These known root-pins involve the drawback that, when filled with quick-curing synthetic resin, they can be used once only, since the synthetic-resin filling forms an indissoluble combination with the synthetic resin of the root-pin; in the case of this drawback of being able to be used only once, the high cost of the tools (metal dies) required for making the root-pin plays a decisive part. Further, the synthetic root-pin that can be used only once makes it necessary to keep a very big stock.
  • a root-pin for model-teeth which forms the object of this invention, is characterized by a metal frustum which, in the neighborhood of the end with the big diameter, has a central hollow space of circular cross-section and also one or several transverse external annular grooves, and is provided on the outside with a fiat ground surface parallel to the axis and extending from the end with the small diameter to at least the middle of the length of the frustum, the distance of said surface from the axis of the frustum being at least approximately equal to the small radius of the frustum.
  • FIGURE 1 is a side view, partly in section, of a first embodiment of the present invention
  • FIGURE 2 is a top view of the form shown in FIGURE 1;
  • FIGURE 3 is a side view, partly in section, of a second embodiment.
  • the root-pin shown comprises a metal frustum 1, its big diameter being designated D, its small diameter a, and its length L.
  • the metal frustum 1 has a central hollow space 2 in the shape of a cylindrical boring, which extends over about one-third of the length L of the frustum.
  • the metal frustum 1 has two external transverse grooves 3 in the neighborhood of the same end; the profile cross-section of said transverse grooves is a square, one side of which runs parallel to the frustum axis A-A.
  • the metal frustum 1 On its outside the metal frustum 1 is provided with a flat-ground surface 4 which is parallel to the axis and extends from the end with the small diameter d over about two-thirds of the frustum length L; the distance of said surface 4 from the frustum-axis AA corresponds to the small radius r of the metal frustum 1.
  • a coaxial cylindrical blind-boring 5 After the central hollow space 2 there follows a coaxial cylindrical blind-boring 5, whose diameter is less than that of the central hollow space 2, and whose axial length is less than that of the central hollow space 2.
  • a further merit of the metal pin is seen in that in the neighborhood of the central hollow space 2, the wall thickness W can be kept much smaller than in the case of a root-pin made of synthetic material, in accordance with the lesser deformability of metal as compared with a synthetic material.
  • the root-pin Since the metal of the root-pin does not combine chemically with a synthetic-resin filling, the root-pin may always be used again, so that the amount kept in stock can be considerably reduced.
  • the outer transverse grooves 3 which may of course have another profile cross-section than that illustrated, perrnit an appreciably improved holding of the connecting material between copper-ring impression and root-pin.
  • both the central hollow space 2 and the blindboring 5 may be made tapering, and then it will be found more suitable to choose the same angle of taper as used for the metal-frustum 1.
  • a root-pin for a model-tooth die comprising a metal frustum which, in the neighborhood of an end having a larger diameter, has a central hollow space of a circular cross-section, and is provided on the outside with a flat-ground surface parallel to an axis of the frustum and which extends from an end having a smaller diameter to at least the middle of the length of the frustum, the distance of said surface from the axis of the frustum being substantially equal to the small radius of the frustum, the central hollow space extending from the larger end toward the smaller end and terminating short of the smaller end to form a blind opening.
  • a root-pin as claimed in claim 1 wherein the cen-, 6.
  • a root-pin as claimed in claim 1, including an tral hollow space extends over approximately one-third transverse groove having a Square Profile Crossof the length of the frustum.
  • central hollow space there follows a coaxial cylindrical 5 blind bore, whose diameter at a place of transition is less References Cited than that of the central hollow space, and whose axial U I STATES PA length is less than that of the central hollow space. 3 153 283 10/1964 Weissman 32 40 4.

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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)
  • Toys (AREA)
  • Adornments (AREA)
  • Prostheses (AREA)
US658789A 1966-08-09 1967-08-07 Root-pin for model-teeth Expired - Lifetime US3466751A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1170266A CH448378A (de) 1966-08-09 1966-08-09 Wurzelstift für Modellzähne

Publications (1)

Publication Number Publication Date
US3466751A true US3466751A (en) 1969-09-16

Family

ID=4376041

Family Applications (1)

Application Number Title Priority Date Filing Date
US658789A Expired - Lifetime US3466751A (en) 1966-08-09 1967-08-07 Root-pin for model-teeth

Country Status (7)

Country Link
US (1) US3466751A (de)
AT (1) AT282050B (de)
CH (1) CH448378A (de)
DE (1) DE1566235A1 (de)
FR (1) FR1552874A (de)
GB (1) GB1144988A (de)
SE (1) SE318059B (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE579504C (de) * 1931-08-18 1933-06-28 Dresdner Gold U Silber Scheide Zylindrisch gestufter Zahnwurzelstift fuer den unmittelbaren verschweissenden Anguss des Metallaufbaues einer Zahnkrone
DE584317C (de) * 1931-09-05 1933-09-18 Heinrich Hollmann Dr Verfahren zur Herstellung von Auflagekoerpern fuer zahnaerztliche Zwecke
US3153283A (en) * 1962-01-12 1964-10-20 Weissman Bernard Dowel pin assembly for dental dies

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE579504C (de) * 1931-08-18 1933-06-28 Dresdner Gold U Silber Scheide Zylindrisch gestufter Zahnwurzelstift fuer den unmittelbaren verschweissenden Anguss des Metallaufbaues einer Zahnkrone
DE584317C (de) * 1931-09-05 1933-09-18 Heinrich Hollmann Dr Verfahren zur Herstellung von Auflagekoerpern fuer zahnaerztliche Zwecke
US3153283A (en) * 1962-01-12 1964-10-20 Weissman Bernard Dowel pin assembly for dental dies

Also Published As

Publication number Publication date
SE318059B (de) 1969-12-01
GB1144988A (en) 1969-03-12
DE1566235A1 (de) 1970-07-23
CH448378A (de) 1967-12-15
FR1552874A (de) 1969-01-10
AT282050B (de) 1970-06-10

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