US3798772A - Cut-away model for dental prosthesis - Google Patents

Cut-away model for dental prosthesis Download PDF

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Publication number
US3798772A
US3798772A US00298016A US29801672A US3798772A US 3798772 A US3798772 A US 3798772A US 00298016 A US00298016 A US 00298016A US 29801672 A US29801672 A US 29801672A US 3798772 A US3798772 A US 3798772A
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US
United States
Prior art keywords
casting
segment
plate
socket
dental structure
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Expired - Lifetime
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US00298016A
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English (en)
Inventor
Eberhard Peter
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Individual
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Individual
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Publication date
Priority claimed from DE19712151671 external-priority patent/DE2151671C/de
Application filed by Individual filed Critical Individual
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Publication of US3798772A publication Critical patent/US3798772A/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

Definitions

  • ABSTRACT A model for a dental prosthesis is formed as a segment of a casting which is severed from the body of that casting'by lateral cuts and by a plate imbedded in the casting.
  • the plate defining a parting surface between the body of the casting and the segmented model, has a noncircular pedestal which positively orients the model with reference to the body and forms a socket for a dowel serving for the temporary retention of the model on the body.
  • My present invention relates to a dental structure of the type wherein one or moresegments of a casting, formed as a replica of the gums and denture of the patient, are cut away from the body of the casting to serve as models for individual teeth or other parts of the denture which are to be fitted with dental prostheses such as bridges or crowns.
  • the segment can be returned to its original position after having been worked on by the technician, e.g. for the purpose of being capped.
  • Frequent removals and reinsertions tend to loosen the fit between the pin and its hole so that the structure may not maintain its original shape even if a filler is placed in the hole for better retention.
  • the segment may also turn about the pin (within the limits of mobility afforded by the lateral cuts) inasmuch as such rotation is not impeded by the relative smooth parting surface which corresponds to the free surface of the molten mass poured into the mold in the first casting phase. Difficulties are also experienced in temporarily supporting the pin or pins in the mold, prior to and during this first phase, in a manner designed to hold them at right angles to the parting surface (i.e. vertical) so as to facilitate the subsequent removal and reinsertion of theassociated segments.
  • the general object of my present invention is to provide an improved dental structure of the character set forth which insures the accurate repositioning of one or more cut-away segments even after repeated removals and re-emplacements.
  • a related object is to provide a process for making such a structure with avoidance of the difficulties referred to.
  • the retaining dowel used as the detachable fastening means tapers from a larger diameter in the segment to a smaller diameter in the casting body into which this dowel projects through a similarly tapering socket formed by the plate.
  • This socket advantageously forms part of a pedestal of noncircular outline which is integral with the plate and is received in a complementary recess of the segment (formed automatically during casting) so as to hold same against rotation; in this way, the segment is positively oriented with reference to its base.
  • the imbedded plate consists of a synthetic resin (e.g. Teflon) which adheres only weakly or not at all to themass of the casting, especially to the composition (e.g. plaster) used for the cut-away segment.
  • a synthetic resin e.g. Teflon
  • the surface of the plate confronting the segment could be specially treated (eg Teflon-coated) to minimize adhesion.
  • FIG. 3 is a bottom view of a plate imbedded in the structure, as seen on the line III III of FIG. 2;
  • FIG. 4 is a cross-sectional view of the plate taken on i the line IV IV of FIG. 3, with part of the surrounding casting indicated in phantom lines;
  • FIG. 5 is'a cross-sectional view of the casting without the mold, after trimming and inverted with reference to FIG. 2.
  • FIG. 1 I have shown a dental structure 1 formed as a unitary casting of a material such as plaster conventionally used for this purpose. Separated by lateral saw cuts 5 from the body of the casting 1 are two segments 4 to be used as models for a pair of teeth to be interconnected by a bridge. The cut-away segments 4 rest on respective plates 6 (only one being visible) which are partly imbedded in the casting body and whose exposed upper faces are the parting surfaces 3 between the body and the segments 4.
  • the structure 1 forms a base la separated by the imbedded plate 6 from the segment 4 which is cast integrally with the remainder of the structure, including the base 1a, in a mold constituted by a cup and a wax impression 14.
  • the plate 6, resting on opposite lips 16 of the wax impression, is initially held in position by pegs 17 passing into the wax through holes 18 of the plate (see also FIG. 3).
  • An oblong pedestal 13, integral with plate 6, is traversed by a frustoconical bore 7 which extends into a collar 9 on the opposite'side of the plate and forms with it a socket in which an upwardly tapering dowel 2 is frictionally retained during casting.
  • Dowel 2 has a knurled extension 8 improving its bond to the segment 4 which is cast around the pedestal and the lower part-of the dowel as viewed in FIG. 2.
  • the upstanding socket portion is flanked by bosses 11 which, along with collar 9, penetrate into the base portion 1a of the casting.
  • the lateral edges 12 of the rectangular plate 6, extending parallel to the pedestal 13, are beveled (as best seen in FIG. 4) so as to be overlain by portions of the casting l.
  • the entire body 1 with its segments 4 is cast in a single operation, with simultaneous hardening of all its parts.
  • pedestal 13 The exposed surface of pedestal 13 is a portion of the parting surface 3 between base la and segment 4. Upon removal of the segment, the latter exposes a recess 4a which is complementary to the pedestal l3 and precisely orients the segment with reference to base la and plate 6 upon subsequent reassembly.
  • a dental structure comprising a casting in the shape of at least a partial denture and at least one segment severed from the body of said casting by lateral cuts, said segment being a model of part of the denture; a plate provided with a throughgoing socket and imbedded in said casting between said body and said segment, said plate being anchored to said body and defining a parting surface between the latter and said segment; and a dowel anchored at one end in said segment and having its other end detachably received in said socket for temporarily retaining said segment in said casting.

Landscapes

  • 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 Prosthetics (AREA)
US00298016A 1971-10-16 1972-10-16 Cut-away model for dental prosthesis Expired - Lifetime US3798772A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712151671 DE2151671C (de) 1971-10-16 Sage Modell fur zahnprothetische Arbeiten und Verfahren zu seiner Her stellung

Publications (1)

Publication Number Publication Date
US3798772A true US3798772A (en) 1974-03-26

Family

ID=5822578

Family Applications (1)

Application Number Title Priority Date Filing Date
US00298016A Expired - Lifetime US3798772A (en) 1971-10-16 1972-10-16 Cut-away model for dental prosthesis

Country Status (7)

Country Link
US (1) US3798772A (enExample)
JP (1) JPS4847194A (enExample)
BE (1) BE789313A (enExample)
CH (1) CH538279A (enExample)
FR (1) FR2157331A5 (enExample)
IT (1) IT975107B (enExample)
NL (1) NL7213491A (enExample)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001938A (en) * 1973-07-16 1977-01-11 Cooper Abraham J Dental restoration jig
US4238189A (en) * 1979-07-30 1980-12-09 Tirino Angelo C Method and apparatus for making in a single operation a base and dental model including a tooth die with an integral bayonet type mounting pin
US4240605A (en) * 1979-09-17 1980-12-23 Pennwalt Corporation Jig assembly for preparing dental impressions for casting
US4288220A (en) * 1980-03-31 1981-09-08 Pennwalt Corporation Dental casts having vertical adjustments
US4398884A (en) * 1979-10-19 1983-08-16 Kv33 Corporation Dental model
US4721464A (en) * 1985-06-17 1988-01-26 Roden Mack L Method and apparatus for making a dental model
WO1989006114A1 (en) * 1987-12-31 1989-07-13 Mayclin Thomas J Dental model alignment device
USD303709S (en) 1987-07-27 1989-09-26 Roden Mack L Combined dowel pin and parting guide for use in construction of a dental prosthetic
USD303836S (en) 1987-07-27 1989-10-03 Roden Mack L Combined dowel pin and parting guide for use in the construction of dental prosthetics
US4997370A (en) * 1987-12-31 1991-03-05 Mayclin Thomas J Dental model alignment device
US5125833A (en) * 1989-03-28 1992-06-30 Pierre Berceaux Prosthetic positioning device for dentistry
US20050064363A1 (en) * 2001-03-21 2005-03-24 Nikolaus Buchel Supporting base for a denture model and articulator which works in conjunction with the supporting base
US20050186528A1 (en) * 2004-02-23 2005-08-25 Lin Chao H. Positioning needle used in denture mold for positioning denture in plaster cast and denture mold matched with the positioning needle
US20050186529A1 (en) * 2004-02-23 2005-08-25 Lin Chao H. Assembly of positioning needle and denture mold for positioning denture in plaster cast of the denture mold
US20100167414A1 (en) * 2008-12-29 2010-07-01 Stmicroelectronics S.R.L. Self-sealing microreactor and method for carrying out a reaction

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056585A (en) * 1976-05-20 1977-11-01 Waltke Robert W Tooth die and method and apparatus for making the same
FR2623081B1 (fr) * 1987-11-13 1990-03-23 Berceaux Pierre Positionneur prothetique pour l'art dentaire
FR2651673B1 (fr) * 1989-09-14 1994-06-17 Berceaux Pierre Positionneur prothetique pour l'art dentaire.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3470614A (en) * 1966-10-17 1969-10-07 Maurice W Kelly Method and apparatus for making dental die
US3553839A (en) * 1969-09-09 1971-01-12 Kenneth W Gores Method and apparatus for positioning a dowel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3470614A (en) * 1966-10-17 1969-10-07 Maurice W Kelly Method and apparatus for making dental die
US3553839A (en) * 1969-09-09 1971-01-12 Kenneth W Gores Method and apparatus for positioning a dowel

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4001938A (en) * 1973-07-16 1977-01-11 Cooper Abraham J Dental restoration jig
US4238189A (en) * 1979-07-30 1980-12-09 Tirino Angelo C Method and apparatus for making in a single operation a base and dental model including a tooth die with an integral bayonet type mounting pin
US4240605A (en) * 1979-09-17 1980-12-23 Pennwalt Corporation Jig assembly for preparing dental impressions for casting
US4398884A (en) * 1979-10-19 1983-08-16 Kv33 Corporation Dental model
US4288220A (en) * 1980-03-31 1981-09-08 Pennwalt Corporation Dental casts having vertical adjustments
US4721464A (en) * 1985-06-17 1988-01-26 Roden Mack L Method and apparatus for making a dental model
USD303836S (en) 1987-07-27 1989-10-03 Roden Mack L Combined dowel pin and parting guide for use in the construction of dental prosthetics
USD303709S (en) 1987-07-27 1989-09-26 Roden Mack L Combined dowel pin and parting guide for use in construction of a dental prosthetic
WO1989006114A1 (en) * 1987-12-31 1989-07-13 Mayclin Thomas J Dental model alignment device
US4997370A (en) * 1987-12-31 1991-03-05 Mayclin Thomas J Dental model alignment device
US5125833A (en) * 1989-03-28 1992-06-30 Pierre Berceaux Prosthetic positioning device for dentistry
US20050064363A1 (en) * 2001-03-21 2005-03-24 Nikolaus Buchel Supporting base for a denture model and articulator which works in conjunction with the supporting base
US20070243501A1 (en) * 2001-03-21 2007-10-18 Nikolaus Buechel Supporting Base For A Denture Model And Articulator Which Works In Conjunction With The Supporting Base
US20050186528A1 (en) * 2004-02-23 2005-08-25 Lin Chao H. Positioning needle used in denture mold for positioning denture in plaster cast and denture mold matched with the positioning needle
US20050186529A1 (en) * 2004-02-23 2005-08-25 Lin Chao H. Assembly of positioning needle and denture mold for positioning denture in plaster cast of the denture mold
US20100167414A1 (en) * 2008-12-29 2010-07-01 Stmicroelectronics S.R.L. Self-sealing microreactor and method for carrying out a reaction
US7989214B2 (en) * 2008-12-29 2011-08-02 Stmicroelectronics S.R.L. Self-sealing microreactor and method for carrying out a reaction

Also Published As

Publication number Publication date
NL7213491A (enExample) 1973-04-18
DE2151671B1 (de) 1972-12-07
JPS4847194A (enExample) 1973-07-04
FR2157331A5 (enExample) 1973-06-01
CH538279A (de) 1973-06-30
IT975107B (it) 1974-07-20
BE789313A (fr) 1973-01-15

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