WO2008145687A1 - Procédé et dispositif permettant d'établir un modèle de dentition d'un patient - Google Patents

Procédé et dispositif permettant d'établir un modèle de dentition d'un patient Download PDF

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Publication number
WO2008145687A1
WO2008145687A1 PCT/EP2008/056595 EP2008056595W WO2008145687A1 WO 2008145687 A1 WO2008145687 A1 WO 2008145687A1 EP 2008056595 W EP2008056595 W EP 2008056595W WO 2008145687 A1 WO2008145687 A1 WO 2008145687A1
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WO
WIPO (PCT)
Prior art keywords
impression
placeholder
model
patient
pouring
Prior art date
Application number
PCT/EP2008/056595
Other languages
German (de)
English (en)
Inventor
Paul Rosenhain
Original Assignee
Luntscher, Nikolaus
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 Luntscher, Nikolaus filed Critical Luntscher, Nikolaus
Publication of WO2008145687A1 publication Critical patent/WO2008145687A1/fr

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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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0001—Impression means for implants, e.g. impression coping

Definitions

  • the invention relates to a method and devices for creating a model of a patient's dentition, in particular for the preparation of attachable to implants dentures.
  • Implanted dentures consist of up to three components: an artificial root (implant) that is inserted into the jawbone by the dentist, a connecting piece (implant post) and an artificial dental crown or the bridge or denture that is manufactured in the dental laboratory.
  • the implant usually consists of the metal titanium and is manufactured in the form of a screw or a cylinder and is between 8 and 16 mm long.
  • a connecting piece so the implant post with the tooth crown or bridge or prosthesis is strengthened.
  • the connector is also made of titanium or ceramic, the Tooth crown or bridge is made like a conventional metal or ceramic veneer crown or ceramic.
  • the disadvantage here is that the implant used in the jaw can not give in or avoid dents, but is rigidly fixed in the bone. Therefore, inaccuracies in the - necessarily two-fold - impression of the patient's dentition can not be compensated and cause the prosthesis is useless.
  • impression material usually silicone
  • Impression material - curing the impression material.
  • Implant is connected
  • the gypsum model now has the embedded model analogues that are visible in recesses in the gingival mask.
  • the dental technician can now insert the abutment posts / implant posts and model the tooth or prosthesis or bridge.
  • the invention also relates to a method and devices for creating a master model of the jaw situation of a patient for the preparation of dental prostheses with double crowns / superstructures on implants.
  • Impression materials shrink concentrically, if they are free in the room, z. B. if they do not adhere to the impression tray by adhesive means or mechanically. This results in a reduction of the negative form result. If the impression material is fixed to the impression tray, it will eccentrically shrink towards it and lead to an enlargement of the negative form; the model is oversized. The greater the layer thickness and amount of the impression material compared to the volume of the body to be shaped, the greater the absolute increase of the model volume.
  • Precision impressioning sets the standard for the work piece on which dentures are manufactured.
  • the accuracy of fit of a superstructure is in relation to the specification, which, however, does not exclude endogenous tensions of the impression.
  • the transfer and fixation of a model-accurate superstructure on the implants in the jaw only by manipulation of the design, impression or model is possible.
  • Dentures are created manually or more often using the machinery and CAD-CAM in very different designs and production methods, depending on the needs and purpose of the patient. Dentures are manufactured as fixed, removable, and conditionally removable constructions. Known are: crown, bridge and full denture. These are either made of only one material or are combined in combination of several materials. For this purpose, biocompatible materials are preferably used, such as special plastics, precious and non-noble metals, in alloy or as pure metal and ceramic and zirconium dioxide. In the production of very different production practices and procedures and special equipment in use, the conventional prosthetic production of machine production is increasingly being replaced.
  • z. B. crown a true-to-life tooth model made of wax or plastic of the tooth to be produced is modeled manually in 1: 1 on a previously prepared gypsum or plastic abutment or implant abutment and then in metal casting technology, or from ceramic presstechnisch, also stratification technology , or made of plastic press, cast or stratified.
  • numerous production factors lead to non-constant results in dentures in all areas of dental technology Laboratory productions.
  • Special skills and material knowledge are required in addition to general expertise in the production of dentures.
  • Physically caused negative process developments as well as chemical influences lead despite many years of experience again and again to errors in manually created dentures.
  • Manual production is limited in time and, last but not least, qualified personnel are also expensive.
  • the computer-aided manufacturing is cheaper and very advanced. For all indications of restorative dentistry, it offers variable internal and external systems for the production of modern dental prosthesis products for almost all possible solutions in all imaginable materials.
  • CAD-CAM processes are increasingly replacing faulty manual production.
  • Trendy production methods today also allow the use of special materials with advantageous properties, such as the pure titanium, which industrially produced as a block for CNC production has no casting impurities and porosities and harmonizes well with identical titanium implants implanted. In addition, it does not lead to negative ion migration and bone destruction by electrolysis.
  • Metal-free dentures is a desired goal in dentistry. This requires special, break-resistant stable ceramics, which can be done with the zirconia material optimally. Since their introduction in 1998, constantly improved computer systems and software enable novel solutions with meaningful designs and expand the range of dental prostheses.
  • the well-known advantages of zirconium dioxide have been taken into the dental field due to already proven hip implants, which have been successfully used clinically for years. Nevertheless, the relatively short testing phase predicts good expected results with metal-free dentures, as with the delicate scaffolds.
  • this ceramic material offers decisive aesthetic advantages over metallic, light-absorbing constructions.
  • Zirconia has excellent material properties and allows stable, relatively delicate constructions because of their enormous strength.
  • the CNC production enables wide-span all-ceramic constructions that fit perfectly on the model. In implantology, it has therefore also become the drug of choice, as it is also unlike titanium plaqueunan 23.
  • the prefabricated components produced from the metal and novel materials with material properties that are especially suitable for this purpose, which are very difficult or even impossible to produce in the laboratory.
  • decisive advantages are the reproducible results with excellent fit results and exact products of consistent quality.
  • These production methods are cheaper due to external outsourcing. As plasters and plastics for almost all system-related model materials also develop according to the usual impression techniques, the actual problem of non-corresponding model analogues and implants is still present.
  • the prosthesis fits snugly on the model.
  • CAD-CAM e.g. also in rapid prototyping
  • a transfer is made from the dental stump or implant abutment ground on a previously created model made of gypsum, plastic or material suitable for the respective applied system after virtual digital acquisition by scanning with a laboratory scanner or externally when using 3D planning with computed tomography designed for a true to original model of the tooth to be produced with appropriate computer software and hardware.
  • the digital data acquisition and transfer to the working model does not call into question the type of impression, but rather the deformation reactions from the working model creation, since contractions such as expansions in the material do not reproduce the created fit of the dentures on the jaw.
  • the transfer takes place by means of manual scanning or, as with CEREC System Sirona, with the corresponding hardware and software. Again, the production of dental prostheses after an impression and Hämodellher too done.
  • the accuracy of the impression of a patient's denture is already flawed.
  • irreversible elastomeric impression materials such as A-silicones and polyethers, as well as reversible hydrocolloids and water-based alginates.
  • the abovementioned materials and virtually all known impression materials are subject to thermal reactions which lead to residual stresses during the setting process. During the setting process and after lifting, these residual stresses naturally lead to deformations in the negative impression. Furthermore arise when lifting the just set off impression of the jaw low but also irreversible upsets in the impression material, which provide when removing the jaw of the patient for further inaccuracies.
  • the 2% non-recovery also represents a dimension change that has a three-dimensional effect and leads to the greatest difficulties in the transfer of fits in implant prosthetics.
  • the inaccuracies occurring are not uncritical even with natural teeth in dental technology, even if after insertion of the denture, e.g. a crown, bridge, etc., which can give in contact with teeth in certain limits because of the elastic periodontium apparatus.
  • too short and too long crowns, such as too narrow or too wide marginal closure can result from the above-mentioned 2% non-return.
  • the above-mentioned inaccuracies are especially problematic in implants prosthetics.
  • Dentures worn on implants so-called superstructure, consists of several components. A superstructure is superimposed on the implant.
  • the number of implants determines the extent and construction type, which also requires appropriate construction in connection with natural tooth roots, or prepared natural dental abutments.
  • the implant is inserted into the jawbone by the dentist or surgeon, surgically inserted or implanted. Multi-part implants are connected via a connector (implant post or abutment) to the tooth crown, bridge or denture.
  • Implants are usually made of the metal titanium, which is particularly well suited for this and clinically well proven. Aesthetic advantages are offered by zirconia-made implants, which are manufactured in one piece with the implant abutment for technical reasons. A distinction is made in implants one-piece and multi-part components, one-piece so-called single-phase implants consist of one part, namely the artificial tooth root with tooth stump. Multi-part or multi-phase implants consist of several components and are sometimes combined in combination with titanium and zirconium dioxide or other combinations with biocompatible material components. In the Implantabauforrmen exist several systems that are designed very different; These can be made in the form of a screw or a cylinder and are between 4 to 16 mm long.
  • the tooth root is fixed via a titanium screw in the interior via a connecting piece with the implant post.
  • the connector can also be made of titanium or zirconium dioxide.
  • the denture crown, bridge or denture is made in a conventional manner and mounted on the implant or implants.
  • the goal of a master model is to enable precise dental prosthesis production. For this, the conditions of a correct impression and exact model production must meet the requirements.
  • the invention is therefore based on the object to provide an improved method and devices for creating a model of a patient's dentition.
  • the object whose position and orientation should be transmitted particularly accurately be first excluded from the known from the prior art impression or pouring by a soft placeholder.
  • the impression or Pouring a curing without that can build up residual stresses in the area of the object, since the object does not come into contact with the impression or Ausg screenmasse.
  • care must therefore be taken to ensure that a clearance remains around the object during the curing of the impression or pouring material.
  • the remaining space around the object is stiffened in a further step, for example by pouring the space after removal of the placeholder or by curing the placeholder.
  • the method according to the invention is particularly suitable for the creation of a model of a patient's dentition for the preparation of dental prostheses that can be fixed on implants.
  • two impressions are made, namely a first impression in which the patient's teeth form thefastformende form and a transfer post is provided as an object, which on a bone of the patient's dentition fixed implant is releasably attached, and a second impression, in which the in the first Molding molded negative mold forms the mold to be molded and a so-called model analog is provided as an object which is releasably secured on a fixed in the negative form of the transfer post.
  • the teaching of the invention can also be applied to other situation impressions for the creation of dental prostheses, z. B. crowns, double and multiple crowns transferred.
  • the patient's dentition with framework forms the form to be shaped and the framework crown detachably connected to it forms the object.
  • the fixation described by means of fixing screws is only one possibility of the embodiment of a releasable fastening means between form and object to be formed. It is also possible to select one-click, snap-on or snap-in connections. These allow a so-called closed mouth impression, in which the form attachable transfer caps are embedded in the impression compound using a conventional impression löffeis. This needs no recesses.
  • the impression tray need not contain any recesses, i. H. the placeholder does not have to be accessible. It thus eliminates work steps.
  • the reactive material is preferably activatable in such a way that it begins to cure with a time delay upon contact with the impression or pouring material. The time delay is to be selected such that after contact first the impression or pouring material hardens and the placeholder only then hardens.
  • the method is suitable for embedding any object or primary structure which is permanently but detachably connected to the mold to be molded.
  • a primary structure for. As a crown frame, initially placed in the mouth on the tooth stump or the implant and taken a first impression.
  • the primary structure serves as an object, which is provided with a placeholder before the impression. Since it is a closed impression, the inaccessible placeholder must consist of the above-described reactive material. It stays soft while the impression hardens and only then hardens itself.
  • the primary structure is first with a suitable fixation z.
  • B the common double pin provided. The latter serves as an object and is provided in accordance with the invention with a corresponding placeholder.
  • the method can also be carried out when the object is firmly and permanently connected to the shape to be molded.
  • a prepared tooth stump or implant-attached abutment may be such an object. After stiffening the free space then the impression can be deducted together with the stiffened space.
  • the devices required for carrying out the method are also claimed.
  • the use of an elastic sleeve as a placeholder allows the dentist or dental technician quickly and without much work, the placeholder on the object, so usually apply the transfer post or the model analog.
  • An industrially manufactured prefabricated sleeve as a placeholder also offers the advantage of great regularity, so that the volume to be cured later is very uniform, in particular rotationally symmetrical.
  • the spout thus has a substantially equal wall thickness around the object.
  • the placeholder is configured self-centering with respect to the object. This compensates for the residual stresses occurring during curing.
  • a self-centering sleeve for example, be realized by the fact that inside lamellas, in particular tapered inward Lammellen, z. B. in triangular form, extend. After putting on the object, for example, a transfer post, model analog or a framework in crowning technique, and short twisting of the sleeve, this is applied symmetrically to the object. Slats also allow such a placement on objects with irregular cross-section (eg oval, rectangle, triangle, any cross-section) in accordance with compliant outer walls of the sleeve. The outer walls follow the shape.
  • a further advantageous embodiment provides an anti-rotation in relation to the outer surface of the placeholder. This prevents the sleeve from accidentally twisting.
  • An anti-rotation can also consist in that the cross section of the applied placeholder deviates from the circular shape, that is, or triangular or oval. The cross section may be a property of the placeholder or arise only after placement.
  • the spout thus has a substantially equal wall thickness around the object
  • the placeholder is made as an endless tube, that is, all elements, such as lamellae, recesses or notches are uniformly parallel to the longitudinal axis. This allows economical production as an endless tube z. B. by extruder. Also, an economical production by injection molding is possible, so that eliminates the necessary during extrusion section.
  • a particularly user-friendly design provides for a curable placeholder. This is so soft in the ground state that when curing the Ab fauxsl. Pouring material barely, or no voltages can be transmitted to the object surrounded by the placeholder. Only after the curing of Ab fauxs Spout material activates the hardenable placeholder and hardens. Known activations are in particular chemical activation and UV irradiation.
  • the big advantage in terms of application technology lies in the fact that hardly anything changes for the dentist or dental technician during implant impression.
  • the intermediate step "curing by UV irradiation" is only necessary after the curing of the impression or pouring compound, and for the patient, the procedure used so far is merely extended by the times for the curing of the placeholder
  • the curable placeholder once connected to the object at the factory, need not be slid on, but may rest against the object inside, so the placeholder essentially encloses the object.
  • the placeholder is cup-shaped or has a lid and therefore can not run.
  • the thickness of the lid is to be dimensioned such that it protrudes over the impression tray edge or flush during the first impression and / or predetermines the model base height during the second impression or has the necessary thickness for grinding or material thickness at low fixation.
  • the lid handling means for.
  • the lid may be permanently connected to the placeholder sleeve, in particular be integral with the placeholder.
  • a self-closing opening, z As a narrow slot or partially overlapping shapes or surfaces, that allows
  • the lid When the lid is removable, it is preferable to provide an outer border surrounding the upper outer wall of the sleeve. After removing the lid, the upper wall piece of the sleeve is exposed and can be taken. A pin pointing downwardly in the inner part of the lid for insertion into the opening of the sleeve centers and secures the lid against the sleeve.
  • the advantages of outer border and tenon can also be combined.
  • the lid can only partially, d. H. be hinged, connected to the sleeve, such that it is hinged.
  • the opened lid thus serves as a handling means, optionally, the
  • Placeholder can be pulled out by pulling on the open lid by pulling with your hand.
  • the wholly or partially attached lid is preferably made in one piece with the sleeve, for. B. in the pressure injection molding, or by casting on the sleeve. It can also be glued on.
  • a perforation extending through the sleeve is proposed, which runs in a vertical direction or, preferably, spirally from top to bottom. When pulling out, the sleeve can thus dodge inward and can be removed with less force.
  • the placeholders used in the second impression which are attached to the model analog. It does not penetrate plaster and the sleeves can be better grasped thanks to the lid.
  • Figure 2 shows the situation of Figure 1 after the impression
  • FIG. 3 shows the impression from FIG. 2 after transfer to a plaster model with placeholders placed on the model analogue
  • FIG. 4 shows the finished plaster model
  • FIG. 5 shows a placeholder
  • Figure 6 various alternative embodiments of the placeholder with cover.
  • Figure 1 shows in the jaw 9 screwed conventional implants.
  • the dentist has so-called transfer posts 11 by means of a in the upper part of the
  • Transfer post 11 accessible fixing screw 12 screwed to the implants A previously individually made impression tray made of plastic 7 was first placed on the sample to check whether the fixing screws 12 fit through the introduced into the impression tray 7 recesses 71.
  • the lower side of the impression tray 7 in FIG. 1 is then filled with impression material, for example silicone, and pressed onto the patient's jaw 9 under pressure.
  • FIG. 2 shows the situation after the impression.
  • the second implant 10 from the right shows the placeholder 3 placed on the transfer post 11 before the impression, which creates a free space 4 next to the transfer post 11 into which no impression material 51 has penetrated.
  • the spacer 3 forming the sleeve can now be pulled out, so that subsequently the free space 4 can be poured 53.
  • This may be a different material than the impression material 51 or the same material. It is crucial that when curing the impression material 51 no stresses on the transfer post 11 could be transmitted.
  • the transfer post 11 is completely stress-free because of the free space 4 surrounding it.
  • the implant on the right in the figure shows the state with free space 4 filled with silicone 53.
  • the removal of excess impression material on fixing screws 12 and placeholder 3 in the area of the recesses 71 of the spoon 7 takes place before setting or hardening of the impression compound 51.
  • FIG. 3 already shows the casting from FIG. 2, the underside of the transfer posts 11 having been rigidly connected to model analogs 21 by means of the fixing screw 12.
  • a gingival mask 61 made of silicone was modeled on the impression material 51, 53 in the usual way.
  • placeholder 3 are used; However, these are this time attached to the model analogues 21, ie those components that replace the implant 10 in the model.
  • the negative mold thus formed with gypsum 52 or other application-suitable materials, for.
  • plastic or epoxy resin poured out during curing, the inevitable shrinkages because of the placeholder 3 and created by this free space 4 are not transferred to the model analogues 21.
  • the placeholder 3 are pulled out again and thereby resulting comparatively small and uniform space 4 is poured out, for example by plastic 54th
  • FIG. 4 shows the model analogues 21 cast in plastic 54 in the finished model.
  • the fixing screws 12 were again solved, so that the impression tray 7 with impression material 51, 53 and embedded therein transfer posts 11 could be removed.
  • the dental technician can now place the implant posts (not shown) on the model analogues 21 and begin the construction of the tooth.
  • FIG. 5 shows a placeholder 3 according to the invention made of a soft, elastic material, for example Silicone.
  • the substantially cylindrical spout 3 is hollow on the inside and has a plurality of inwardly directed fins 31, which taper inwardly, the grommet 3 therefore centers itself when it is pushed onto a suitable object.
  • Notches 32 are provided on the outer wall of the spout as anti-rotation. Preferably, these lie along individual or all lamellae, so that the thicker wall thickness of the nozzle in the region of the lamellae can be used for the notches.
  • the wall thickness W can therefore remain low, resulting in reduced Internal stress leads and where the spout can be easily bedded.
  • outward-facing slats or other raised shapes such as rounding for rotation security are possible.
  • the lamellae 31, as well as the notches extend in the longitudinal direction of the spout, so that it can be manufactured as a continuous strand, in particular by extrusion.
  • Fig. 6 shows implants 10 in the first impression with placed on the transfer posts 11 different placeholders 3 next to the transfer post 11 create a free space 4, in which no impression material 51 has penetrated. These have according to the invention covers 310, 320, 330 and 340. After hardening of the impression material 51, the placeholders 3 can now be pulled out, so that subsequently the free space 4 can be poured out.
  • the first placeholder 3, 310 from the left is cup-shaped, d. H.
  • the known from Fig. 2 sleeve 3 is closed at the top by a lid, which is connected in the embodiment in one piece with the sleeve. He therefore can not run.
  • the lid protrudes from the spoon 7.
  • Asverulentde opening 311, here a narrow slot, allows the implementation of an instrument, for. As screwdriver, to operate by the placeholder 3, 310 concealed fixing screw 12. This opening can be used with all lids, but only exemplified here.
  • the third placeholder 3 from the left has a separate cover 330 with outer border 331, which comprises the upper outer wall of the sleeve 3, that is free from impression material. After removing the cover 330, the upper wall piece of the sleeve is exposed and can be taken.
  • the fourth placeholder 3 from the left has a separate lid 340 with inner pin 341 which centers the lid against the upper opening of the sleeve 3 and fixes the lid to the sleeve.
  • the second patz holder 3 from the left demonstrates a separate lid 320 that combines the benefits of the outer perimeter 321 and peg 322.
  • the lid 320, 330, 340 of the second, third or fourth placeholder may also be hingedly connected to the sleeve 3, such that it is hinged.
  • the opened lid thus serves as a handling means, optionally, the
  • Placeholder can be pulled out by pulling on the open lid by pulling with your hand.

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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)
  • Orthopedic Medicine & Surgery (AREA)
  • Dental Preparations (AREA)
  • Dental Prosthetics (AREA)

Abstract

En vue d'éviter des tensions internes lors de l'empreinte ou du moulage des profils qui doivent être moulés, l'invention est caractérisée en ce que l'objet, dont la position et l'orientation doivent être transférées avec une précision particulière, est initialement exclu au moyen d'un espaceur mou, de l'empreinte ou du moulage effectué selon la technique connue. On peut ainsi procéder à un durcissement du matériau d'empreinte ou de moulage sans que se développent des tensions internes dans la zone de l'objet, étant donné que l'objet ne vient pas en contact avec le matériau d'empreinte ou de moulage. L'espace libre demeurant autour de l'objet est renforcé lors d'une étape ultérieure, par exemple, par moulage de l'espace libre, après avoir retiré l'espaceur, ou par durcissement de l'espaceur.
PCT/EP2008/056595 2007-05-29 2008-05-29 Procédé et dispositif permettant d'établir un modèle de dentition d'un patient WO2008145687A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007025164.7 2007-05-29
DE200710025164 DE102007025164A1 (de) 2007-05-29 2007-05-29 Verfahren und Vorrichtungen zum Erstellen eines Modells eines Patientengebisses

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WO2008145687A1 true WO2008145687A1 (fr) 2008-12-04

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8905757B2 (en) 2012-12-03 2014-12-09 E. Kats Enterprises Ltd. Method and apparatus for measuring a location and orientation of a plurality of implants
US9572638B1 (en) * 2014-06-02 2017-02-21 Lloyd T. Anderson Impression coping spacer and method of dental casting

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017211249A1 (de) 2017-07-03 2019-01-03 Sirona Dental Systems Gmbh Verfahren zur Herstellung einer künstlichen Gingiva

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DE3127091A1 (de) * 1981-07-09 1983-01-27 Bisico Ludwigs & Marten Ohg, 4800 Bielefeld Verfahren zur herstellung eines gebissabdrucks und abdruckloeffel
DE19526017C1 (de) * 1995-07-17 1996-08-01 Frank Sahm Verfahren zum Herstellen eines Gebißabdrucks sowie Abdrucklöffel und Set zur Durchführung des Verfahrens
US20020106610A1 (en) * 2000-08-30 2002-08-08 Hurson Steven M. Impression cap
WO2003037207A1 (fr) * 2001-11-01 2003-05-08 Astra Tech Ab Composants et procede d'une prise d'empreinte amelioree

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SE446371B (sv) * 1984-11-20 1986-09-08 Inst Applied Biotechnology Positiv arbetsmodell av en under- eller overkeke, samt ett sett och medel for framstellning av modellen
GB9208442D0 (en) * 1992-04-16 1992-06-03 Asher George B Tooth & selection joint & jig(dental implants)
DE4218263A1 (de) * 1992-06-03 1993-12-09 Josef Herrmann Platzhalter für Abformlöffel zum Herstellen von Zahnersatz
DE4416458B4 (de) * 1994-05-10 2005-03-03 Rau, Günter, Dr. Kunststoffolie für zahnärztliche Abformverfahren, deren Verwendung und Verfahren für zahnärztliche Abformungen

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Publication number Priority date Publication date Assignee Title
DE3127091A1 (de) * 1981-07-09 1983-01-27 Bisico Ludwigs & Marten Ohg, 4800 Bielefeld Verfahren zur herstellung eines gebissabdrucks und abdruckloeffel
DE19526017C1 (de) * 1995-07-17 1996-08-01 Frank Sahm Verfahren zum Herstellen eines Gebißabdrucks sowie Abdrucklöffel und Set zur Durchführung des Verfahrens
US20020106610A1 (en) * 2000-08-30 2002-08-08 Hurson Steven M. Impression cap
WO2003037207A1 (fr) * 2001-11-01 2003-05-08 Astra Tech Ab Composants et procede d'une prise d'empreinte amelioree

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8905757B2 (en) 2012-12-03 2014-12-09 E. Kats Enterprises Ltd. Method and apparatus for measuring a location and orientation of a plurality of implants
US9572638B1 (en) * 2014-06-02 2017-02-21 Lloyd T. Anderson Impression coping spacer and method of dental casting

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