WO2006066438A1 - Dispositif pour mouler une base de prothese pour une prothese dentaire - Google Patents

Dispositif pour mouler une base de prothese pour une prothese dentaire Download PDF

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Publication number
WO2006066438A1
WO2006066438A1 PCT/CH2005/000766 CH2005000766W WO2006066438A1 WO 2006066438 A1 WO2006066438 A1 WO 2006066438A1 CH 2005000766 W CH2005000766 W CH 2005000766W WO 2006066438 A1 WO2006066438 A1 WO 2006066438A1
Authority
WO
WIPO (PCT)
Prior art keywords
trough
prosthesis
plastic
base
molded part
Prior art date
Application number
PCT/CH2005/000766
Other languages
German (de)
English (en)
Other versions
WO2006066438A8 (fr
Inventor
Markus Pleschinger
Tanja Steffen
Original Assignee
Candulor Ag
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Candulor Ag filed Critical Candulor Ag
Priority to EP05815459A priority Critical patent/EP1827292A1/fr
Publication of WO2006066438A1 publication Critical patent/WO2006066438A1/fr
Publication of WO2006066438A8 publication Critical patent/WO2006066438A8/fr

Links

Classifications

    • 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
    • A61C13/12—Tools for fastening artificial teeth; Holders, clamps, or stands for artificial teeth
    • A61C13/16—Curing flasks; Holders therefor
    • 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
    • A61C13/01—Palates or other bases or supports for the artificial teeth; Making same
    • A61C13/04—Palates or other bases or supports for the artificial teeth; Making same made by casting
    • 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
    • A61C13/12—Tools for fastening artificial teeth; Holders, clamps, or stands for artificial teeth
    • A61C13/18—Presses for flasks

Definitions

  • the invention is in the field of dental technology and relates to a device according to the preamble of the independent claim.
  • the device is used for casting a prosthesis base for a dental prosthesis (total or hybrid prosthesis), that is to say for replacing the prosthesis base made of wax modeled on a working model by a corresponding plastic prosthesis base.
  • a working model is used that is created from a dentist's impression of the patient's jaw.
  • the working model essentially consists of a plaster cast of the patient's jaw on a pedestal made of plaster.
  • a denture base is modeled from wax and the artificial teeth are inserted into it.
  • One of the last steps of prosthetic manufacture is to substitute the prosthesis base modeled from wax with a corresponding prosthetic base made of plastic, wherein the artificial teeth and optionally provided web sleeves, button matrices etc. are firmly anchored in this plastic part.
  • the step of casting the prosthesis base is called in the jargon "plugging".
  • cuvettes are used for the above-mentioned work step.
  • a cuvette usually consists of two separable Küvetten really, both of which are formed as a trough with the same, flat Muldenr skilledn.
  • the first cuvette part has a fixed or removable bottom, the second cuvette part has a removable bottom.
  • Gypsum is added to the first cuvette part and the working model with the finished, artificial teeth and the wax prosthesis base is pressed with the contact surface of the working model into this plaster until the outer edge of the prosthesis base opposite the teeth (envelope crease on the image of the patient's jaw). is positioned at the level of the trough edge or slightly below it. Excess gypsum is then removed around the working model protruding from the cuvette part and the gypsum in the first cuvette part is cured. Then the second cuvette part is placed on the first cuvette part with the bottom removed. The bottom opening of the second cuvette part then gypsum is added until the cavity is full.
  • the bottom of the second Bruvettenteils is placed and cured gypsum in the second cuvette part. Then, the cuvette is opened by separating the two cuvette parts, leaving the working model and the waxy prosthesis base in the plaster of the first cuvette part and the artificial teeth in the plaster of the second cuvette part. The waxy prosthesis base is then flushed out and the space previously occupied by the wax filled with an excess of liquid or plastic plastic. The cuvette is then closed again by covering the two parts of the cuvette, whereby the excess plastic is pressed out between the two cuvette parts and the gypsum parts created therein. For this pressing, the two cuvette parts are pressed against each other with a suitable pressing device.
  • the cuvette After curing of the plastic in the closed cuvette, the cuvette is opened again.
  • the working model and the prosthesis which now has a prosthetic base made of plastic and prosthetic base firmly anchored artificial teeth are removed from the cuvette and freed from the cuvette.
  • the excess plastic is squeezed out through the gap between the trough edges of the two cuvette parts and the gypsum parts created therein, by pressing the cuvette parts together. It can not be prevented that a residue of plastic remains in the gap between the two kuvetten really and the two gypsum parts, even if the pressing force is high.
  • the prostheses cast in cuvettes usually have a so-called bite increase, that is, the prosthesis has a height that is slightly larger than that provided in the working model, which must be corrected for the finished prosthesis.
  • a correction can be carried out only by grinding the bite planes of the artificial teeth, since the teeth opposite prosthesis side is exactly adapted to the gums of the patient and for this reason may not be edited.
  • the correction is not only labor intensive but also not beneficial.
  • the object of the invention is now to provide a device with which it is possible to carry out the work step in which the prosthesis base is cast from plastic or in which the wax-like prosthesis base is replaced by a plastic one In no case results in a bite increase.
  • said operation should be simpler or at least no more complex than is the case with the cuvette method described above, and it should be applicable to the same materials in the usual forms.
  • the device according to the invention is based on the idea of avoiding the undesirable bite increase which is actually unavoidable in the use of the known cuvettes by virtue of the fact that the function of removing excess casting material and the function of determining the height of the cast part taken over by different parts of the device and thereby separated from each other locally.
  • the height of the part to be cast can also be determined via a gap, which can be clamped together two device parts is set to zero, but the excess plastic is not squeezed through this gap.
  • the device according to the invention has a first and a second molded part, wherein the first molded part is trough-shaped and the second molded part is advantageously designed as a flat plate and this flat plate is large enough to be able to cover the opening of the trough-shaped first molded part approximately.
  • the device has a fixing means by means of which the two molded parts are aligned relative to one another in always the same way (second molded part above the opening of the first molded part) and can be positioned and fixed at a distance from each other at a predetermined distance. In this fixation, if necessary, a gap between one of the moldings and the fixing agent is set to zero.
  • the working model is fixed by a tooth-side plaster part in the first mold part and by a base-side plaster part in the second mold part, as the two mold parts of the device according to the invention are positioned and fixed by the fixation means the area of the outer edge of the prosthesis base opposite the teeth is kept free of gypsum and the pressed-out, excess plastic does not come into contact with the fixing means, ie it can not influence the distance between the molded parts and thus the height of the cast part
  • the function of removing excess plastic and the function of setting a given height of the part to be molded are spatially separated, thereby making it possible to use the plastic in excess, the height of the cast Te But with the same accuracy and thus to avoid the unwanted bite increase on the finished prosthesis.
  • the device according to the invention is, like the known cuvettes, not only usable for replacement of a wax prosthetic base by a prosthetic base made of plastic but it can also be used in the same way for the total renewal of a prosthetic base made of plastic (so-called repressing), ie for the replacement an older denture base made of plastic by a new such denture base.
  • the device according to the invention is a further development of a known relining device, which is used by dental technicians to adapt existing prostheses to a regressed jaw, in that the existing prosthesis base is ground and then adapted by pouring with plastic to new jaw conditions.
  • FIG. 1 shows the two molded parts and the fixing means of the device according to the invention
  • FIG 2 shows a section through the assembled device according to the invention (section line II-II in Figure 1);
  • FIG. 1 shows, from the device according to the invention, the first molded part 1, the second molded part 2 and a plurality of spacers 3, which form part of the fixing means.
  • the first molded part 1 has, for example, a round depression 4 with an opening 6 5 defined by the edge of a depression wall 5 which is directed towards the bottom in FIG. Opposing areas of the trough wall 5 advantageously run slightly apart towards the trough opening 6.
  • the trough bottom 7 is, for example, flat and advantageously has at least one retention opening 8.
  • the trough bottom 7 or a further element arranged on the outside of the trough bottom 7 projects at least in regions outwards beyond the trough wall 5.
  • the second molded part 2 is designed, for example, as a flat plate 10. This corresponds in size and shape advantageously the trough bottom 7 of the first molded part 1 and also has at least one retention opening 8.
  • the spacers 3 have, for example, a central region 3.1 with a first cross section and end regions 3.2 with a second smaller cross section and a thread.
  • ne ne three here
  • holes 11 are provided, which are matched in size to the end portions 3.2 of the spacers 3 and which are advantageously arranged in a non-symmetrical arrangement such that the molding must be rotated 360 ° to be self-concealed with respect to the bore assembly.
  • the length of the middle distance holder areas 3.1 is greater than the height of the trough 4 by more than the distance between the support surface of the working model and the outer edge opposite the teeth of the prosthetic base positioned on the working model.
  • the trough 4 is, for example, about 40 mm deep and the middle spacer area 3.1 has a length of, for example, 65 mm.
  • the Distanzhalterend Schemee 3.2 are retracted into corresponding holes 11 of the first and second molded part and fixed, for example, with nuts.
  • nuts 12 to be actuated with a key are used for the fixation on the second molded part 2, and wing nuts 13 which can be tightened by hand for fixing to the first molded part 1 (FIG. 2).
  • Figure 2 shows the two mold parts 1 and 2 in their predetermined by the spacers 3 and fixed by the nuts 11 and 12 position in which the two Fo ⁇ nmaschine aligned and spaced from each other.
  • FIG. 3 shows in a partial section a working model 20 positioned in the device according to FIGS. 1 and 2 with a prosthesis base 22 and artificial teeth 23 fixed between a tooth-side plaster part 25 in the first mold part 1 and a mold-side plaster part 26 in the second mold part 2 ,
  • the two mold parts 1 and 2 are separated from each other, the spacers 3 remain connected to the second mold part 2.
  • the first molded part 1 is positioned with the trough opening 6 upwards and gypsum is introduced into the trough 4.
  • the accordingly prepared working model 20 is brushed on the tooth side with plaster and pressed with the tooth side first in the plaster in the trough 4 until the teeth 23 opposite outer edge of the wax prosthesis base sis 22 is at the height of the edge of the trough wall 5 or slightly lower. Excess gypsum is removed around the working model to the level of the edge of the trough wall 5.
  • the plaster in the trough 4 which has leaked easily through the retention openings 8 in the trough bottom, is hardened (tooth-side gypsum part 25). The surface of this gypsum part is treated with gypsum plaster insulation.
  • the two mold parts 1 and 2 separated from each other by disassembling the wing nuts 13 and releasing the second mold part 2 with the working model 20 from the first mold part 1, in which the waxy prosthesis base 22 and the artificial teeth 23 remain.
  • the waxy prosthesis base 22 is then flushed out in a known manner, for example, with hot water and filled the resulting recess with an excess of liquid or plastic plastic.
  • On the working model optionally provided web sleeves, button matrices, etc. are attached.
  • the mold parts 1 and 2 are again positioned on each other, whereby it is ensured by the asymmetrical arrangement of the holes 11 and the spacer 3 that this can be done only in the same rotational position, as in the previous steps.
  • the wing nuts 13 are put back on and slowly attracted to the stop, the excess plastic is pressed to the outside (arrow A in Figure 3) and can be removed in a simple manner. The whole is then exposed to conditions under which the plastic hardens.
  • the two mold parts 1 and 2 are then separated again and the two plaster parts 25 and 26 are removed from the working model 20 and the prosthesis (22 and 23).
  • FIGS. 1 to 3 Further exemplary embodiments of the device according to the invention may differ from the embodiment shown in FIGS. 1 to 3 in the following features:.
  • the regions of the trough bottom projecting beyond the trough 4 are designed as a separate, for example, star-shaped element, which is suitably mounted on the trough 4.
  • the trough wall 5 is not fixed fixed to the trough bottom 7 but removable, e.g. by bayonet closure.
  • the spacers 3 are firmly connected to the second mold part 2, they are for example welded or glued or they are molded with the molded part 2 as a single piece.
  • Both mold parts 1 and 2 are other, for example, screw-like means provided.
  • the spacers 3 are not separated from the first molded part 1 but from the second molded part 2 during the separation of the molded parts 1 and 2.
  • the second mold part 2 has a trough, wherein the distance between the two wells, when they are in their fixed position, is greater than the distance between the support surface of the working model and the outer edge of the prosthesis base opposite the teeth.

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 Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Dental Prosthetics (AREA)

Abstract

L'invention concerne un dispositif utilisé pour mouler une base de prothèse (22) pour une prothèse dentaire ou pour remplacer une base de prothèse en cire produite à partir d'un modèle de travail (20) grâce à une base de prothèse correspondante en matière synthétique. Ledit dispositif comporte deux parties de moulage (1, 2) et un moyen de fixation. Grâce au moyen de fixation, les deux parties de moulage (1, 2) sont réglées et espacées l'une par rapport à l'autre de manière à pouvoir être positionnées et fixées, de sorte que lors du moulage de la prothèse de base l'excès de matière synthétique utilisée peut être extraite sans problème et éliminée, sans que la matière synthétique influence la distance entre les parties du moulage (1, 2). Les prothèses ainsi obtenues ne présentent aucune augmentation de morsure, l'usure non souhaitée des surfaces de morsure des dents artificielles est supprimée sur la prothèse finie, ce qui permet de corriger une augmentation de morsure de ce type.
PCT/CH2005/000766 2004-12-22 2005-12-21 Dispositif pour mouler une base de prothese pour une prothese dentaire WO2006066438A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05815459A EP1827292A1 (fr) 2004-12-22 2005-12-21 Dispositif pour mouler une base de prothese pour une prothese dentaire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2130/04 2004-12-22
CH21302004 2004-12-22

Publications (2)

Publication Number Publication Date
WO2006066438A1 true WO2006066438A1 (fr) 2006-06-29
WO2006066438A8 WO2006066438A8 (fr) 2006-09-14

Family

ID=35734960

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Application Number Title Priority Date Filing Date
PCT/CH2005/000766 WO2006066438A1 (fr) 2004-12-22 2005-12-21 Dispositif pour mouler une base de prothese pour une prothese dentaire

Country Status (2)

Country Link
EP (1) EP1827292A1 (fr)
WO (1) WO2006066438A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4436511A (en) * 1982-06-02 1984-03-13 Mitchell Sr John W Molded dental press
DE3536320A1 (de) * 1985-10-11 1987-04-16 Wolfgang Heynold Verfahren zur herstellung von zahnprothesen und prothesenherstellungsform zur durchfuehrung des verfahrens
US5175008A (en) * 1988-11-24 1992-12-29 Chugoku Shiken Kabushiki Kaisha Device for supplying plastic material for denture base and flask with the same
EP0790039A1 (fr) * 1996-02-19 1997-08-20 Santo Palazzolo Appareil pour la fabrication d'un duplicate d'une prothèse dentaire originale et procédé pour la duplication de prothèses dentaires

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4436511A (en) * 1982-06-02 1984-03-13 Mitchell Sr John W Molded dental press
DE3536320A1 (de) * 1985-10-11 1987-04-16 Wolfgang Heynold Verfahren zur herstellung von zahnprothesen und prothesenherstellungsform zur durchfuehrung des verfahrens
US5175008A (en) * 1988-11-24 1992-12-29 Chugoku Shiken Kabushiki Kaisha Device for supplying plastic material for denture base and flask with the same
EP0790039A1 (fr) * 1996-02-19 1997-08-20 Santo Palazzolo Appareil pour la fabrication d'un duplicate d'une prothèse dentaire originale et procédé pour la duplication de prothèses dentaires

Also Published As

Publication number Publication date
EP1827292A1 (fr) 2007-09-05
WO2006066438A8 (fr) 2006-09-14

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