WO2014170499A1

WO2014170499A1 - Dentistry aid

Info

Publication number: WO2014170499A1
Application number: PCT/EP2014/058095
Authority: WO
Inventors: Claus SCHENDELL-GRÖLING
Original assignee: Schendell-Gröling Claus
Priority date: 2013-04-19
Filing date: 2014-04-22
Publication date: 2014-10-23

Abstract

The invention relates to a dentistry aid having a base plate (1), on which at least one leg (3) is arranged vertically, an upper part (20, 40) designed as a plate, which comprises at least one guide in which the at least one leg (3) of the base plate (1) is guided, a centre line (9) and a recess (30) on its underside, wherein the upper part (20, 40) can be displaced with its underside facing downwards or upwards parallel to the base plate (1), and wherein the base plate (1) and the upper part (20, 40) comprise reference means (11, 23) which are aligned with a tuber plane, wherein the tuber plane is defined in a predefined distance from the at least one leg (3) perpendicular to the base plate (1) and perpendicular to the centre line (9).

Description

Dental technical aid

Field of the Invention: The present invention relates to a dental device, in particular for the precise and simple production of dental models.

Background of the Invention: In dentistry as well as in orthodontics, maxillofacial surgery and implantology, accurate dental models of the patient are required for diagnosis and treatment planning. For this purpose, impressions of the dental arches of the patient, e.g. made of silicone or alginate. These are then subsequently added e.g. poured with plaster to obtain a gypsum arch. So far, a relatively large amount of gypsum is added to the gypsum arch in order to grind later by means of a grinding wheel (also called trimmer) the corresponding tooth models with the corresponding levels. This process is very labor-intensive, dirt and noise-intensive, binds personnel and therefore generates high costs. Empirical studies at national and international laboratories and practices have shown that the average workload for creating a diagnostic model is 25 to 30 minutes on average. Modeling with the known tools and methods often entails model breaks or corrective actions due to errors in casting, grinding or trimming, in particular because during grinding it has to be ensured that the reference planes of the sprocket models have to be exactly parallel.

A well-known remedy is the so-called pedestal device according to Dr. med. Hinz (see www.dr-hinz-dental.de). It serves to fix three-dimensionally oriented spider models and uses plastic socket molds in which the sprocket models held on a plate by means of rubber rings can be fixed by filling gypsum.

However, the existing auxiliary systems do not have the necessary precision in the model production as well as in the model modification. It is therefore the object of the present invention to provide a dental device for the fields of orthodontic, orthodontic, dental and implantological model production and modification, in order to streamline and speed up the dental laboratory and diagnostic processes, and to make them more economical while ensuring the required precision and fine adjustment. Furthermore, it is the task to enable an exact reproducible reproduction of the dentition situation of a patient.

These objects are achieved by the subject matter of claim 1 of the present invention.

Summary of the invention:

According to the invention, a dental aid is provided with a base plate on which at least one support is arranged vertically, a plate designed as a top, the at least one guide, in which the at least one support of the base plate is guided, a center line and on its underside has a recess wherein the top is slidable with the bottom downwards or upwards parallel to the base plate, and wherein the base plate and the top have reference means aligned with a tuber plane, the tuber plane being at a predetermined distance from the at least one support perpendicular to the base Base plate and is defined perpendicular to the median plane. In dental technology, the tuber plane is a virtual reference plane in the upper jaw, which runs through the two tubers, the tuberosity is a hump-like elevation behind the last molar in the upper jaw. The midplane is also called the raphe median plane.

By aligning with the tuber plane ensures that in the creation of the sprocket models of upper and lower jaw during the entire manufacturing process, ie all states of use of the dental device according to the invention, the geometric reference of the models does not change. This allows for accurate insertion and processing over and over again until the product is completed. In addition, the aid according to the invention can also be used for subsequent processing steps, such as the production of a setup model or the like. With the aid of the invention, labor, time, noise, personnel and cost intensive grinding and trimming of models becomes superfluous. On average, this results in significant time savings of approx. 60% in model production. For example, only about 8 to 10 minutes have to be spent per model. Furthermore, there is a considerable reduction in the dust and noise pollution in the laboratory. In addition, the aid according to the invention makes it possible to produce standardized, shapely and precise models. The savings in material, mainly plaster and trimmer disc, are according to experience in Germany at about 10% per year, which can be saved with an average model requirement of 25 pieces per week about 2.500, - EUR per year. Overall, it has been found that the use of the aid according to the invention in the dental laboratories and practices above all the combination of employee relief, cost savings and the absolute precision and appearance of the work results is estimated. Advantageously, the reference means are applied to the top of the base plate in the form of a marker. The marking can be carved, milled or arranged in any other way on the surface of the base plate. It is also possible, for example, to design a heel edge as a marker. Preferably, the reference means are formed on the upper side of the upper part as a stop element, the stop surface is located substantially in the tuber plane. The abutment surface is directed away from the supports when the upper part is inserted into the support (s), ie towards the front, because the support (s) is usually arranged at the rear for handling reasons. The stop elements may be formed integrally with the upper part, for example, milled or formed in one piece. This offers a high degree of precision. Alternatively, the stop element or the stop elements can also be made as separate elements and glued to the upper part or firmly connected in any other way, depending on the material used. With further advantage, the reference means on the underside of the upper part are formed by the recess, wherein the recess is formed in such a tooth-arc shape, that the two ends of the dental arch are substantially in the tuber plane. Aligning the recess with the tuber plane makes it possible to fix the dental arch as precisely as possible on the lower side of the upper part, preferably by means of a reusable one, as early as in the first steps of creating a dental arch model Adhesive compound. The adhesive usually fills the recess from the bottom to the edge of the recess, so that alignment with the two ends of the dental arch is readily possible in all planes. The auxiliary device according to the invention particularly preferably comprises a casting mold holder with a casting mold, the casting mold having a casting recess and being fixable on the base plate such that a rear wall of the casting recess lies in the tuber plane. In this case, the casting seat is preferably formed of cast aluminum and its bottom has at least one opening and a plurality of projections which engage in a corresponding plurality of recesses in the base plate for fixing the Gießformaufnahme. There are also other materials for the Gießformaufnahme possible such as plastics (PP, PS, ABS, etc.) or other metals. For optimal fixation, it is necessary that the recesses and projections match each other as closely as possible, so that there is little play in the fixation. It is also possible to choose other types of fixations: the projections may for example also be formed in the bottom of the base plate and the recesses in the mold holder. Alternatively, magnetic means or other mechanisms can be chosen to secure the mold holder as accurately and detachably as possible on the base plate. The casting mold can also be composed of two or more components. This makes it possible to form the mold from a hard material.

The mold is advantageously formed of silicone. Silicone is sufficiently dimensionally stable and yet somewhat flexible, so that it is very well suited for the shaping and hardening of gypsum filled in it, as used in sprocket models. Other plastic materials having similar properties to silicone, e.g. Hard rubber or the like. In particular, the dimensional stability plays a major role, because it must be ensured that the rear wall of the Gießausnehmung lies in the tuber plane. When using different casting molds for different jaw sizes this should be considered.

In order to achieve a special identification of the sprocket models, a logo or lettering or the like may be formed in the bottom of the Gießausnehmung the mold. This does not affect the functionality of the aid according to the invention in the production of the models and also allows a marking of the models, which does not have to be applied in an additional step, but already takes place during production.

With further advantage, a fixing unit for fastening a sprocket model is arranged on the upper side of the upper part. The stop elements on the top serve as a stop, it being understood that the flat rear wall of the sprocket model as closely as possible abuts on the stop or the stop elements (s) to ensure alignment with the tuber plane. Preferably, the base plate comprises a height adjustment approach, which is designed as a cylindrical projection with external thread, and on which a height adjustment screw and one or more spacers are placed. Thus, the vertical position of the upper part relative to the base plate can be set sufficiently detailed. This design is also simple and easy for the user to catch. Via a scale on a support, the vertical position of the upper part can be read and adjusted. In addition, advantageously ensures a fuse element, which is preferably designed as a cylindrical sleeve with locking screw, that the vertical position of the upper part can be set on the at least one support for a working operation.

The preferred material for the base plate and the upper part comprises aluminum, the supports are preferably made of stainless steel. For example, these components of the aid according to the invention can be completely milled from aluminum or produced as an aluminum die cast. Alternatively, it is also possible to use other materials, e.g. other metals such as stainless steel or metal alloys, plastic or similar materials that provide sufficient strength, durability and resistance and are as easy to work with.

Brief description of the figures:

The invention will be described below with reference to preferred embodiments with reference to the accompanying figures, in which

1 shows a perspective view of part of a preferred embodiment of the dental device according to the invention, FIG. 2 shows a plan view of the part of the dental technical aid from FIG. 1, FIG.

3 shows a plan view of the upper side of an upper part of the preferred embodiment of the dental aid according to the invention,

Fig. 4 is a plan view of the underside of the top of Fig. 3,

5 shows a perspective view of the preferred embodiment of the dental device according to the invention,

6 shows a perspective view of part of the preferred embodiment of the dental device according to the invention with further elements,

7 shows a perspective view of the preferred embodiment of the dental appliance according to the invention with the mold cavity inserted, FIG. 8 shows a perspective view of the preferred embodiment of the dental appliance according to the invention when used for creating dental models, FIG.

FIG. 9 is a perspective view of a maxillary and mandibular dental castor model produced by the preferred embodiment of the dental device according to the invention; FIG.

10 is a perspective view of a second preferred embodiment of the dental device according to the invention with additional components,

1 1 shows a perspective view of the second preferred embodiment of the dental device according to the invention in use, Fig. 12 shows a perspective view of the underside of the upper part of the second preferred embodiment of the dental device according to the invention, Fig. 13 u. 14 show perspective views of the use of the second preferred embodiment of the dental aid according to the invention,

15 is a perspective view of the components of the second preferred embodiment of the dental device according to the invention in use,

16 shows a perspective view of a detail of the underside of the upper part of the dental device according to the invention, and FIG. 17 shows a perspective view of a further working position when using the second preferred embodiment of the dental device according to the invention.

Detailed Description of the Preferred Embodiments:

Fig. 1 shows a perspective view of a basic component of a preferred embodiment of the dental device according to the invention. A base plate 1, which is formed substantially rectangular with rounded corners, has at its one end two supports 3, which protrude at an angle of 90 ° parallel to each other from the surface of the base plate 1. The base plate 1 is preferably formed of aluminum, and the supports 3 made of stainless steel. However, other suitable metals or metal alloys can be used, and the training of plastic or composite materials is possible. On the supports 3, a scale (not shown) is preferably formed for reading or adjusting the vertical position of an attachment (such as upper part 20, see below). The supports 3 have in the illustrated embodiment a circular cross-section. However, other shapes are conceivable, for example rectangular, elliptical or polygonal cross sections. In addition, it is possible that only a single, for example rectangular or elliptical support is used, on which the upper part is guided. It can also be used more than two supports. Of the supports 3 is slightly offset in the direction of the center of the base plate 1 is a Hohenverstellansatz 4, which is preferably designed as a cylindrical extension with an external thread. The Hohenverstellansatz 4 is an optional component which is pressed for example with a matching recess on the base plate 1 or detachably screwed therein. Attached to this height adjustment lug 4 is a height adjustment screw 5, which has an inside thread at the lower end, which corresponds to the external thread of the height adjustment lug 4, and is knurled at the upper end 7 for manual adjustment. The height adjustment screw 5 has at the bottom of a larger diameter than in the upper region, so that you can put a spacer 6 from above on the height adjustment screw 5, which rests on the approach of the height adjustment screw 5 as a stop and has substantially the same outer diameter like the lower portion of the height adjustment screw 5. With the help of the spacer sleeve 6 can be faster adjust larger distances, because thus a cumbersome long rotation of the height adjustment screw 5 can be omitted. The base plate 1 may have centrally behind the supports 3 a cylindrical recess 8, in which the spacer sleeve 6 can be inserted when it is not placed on the height adjustment screw 5.

In the middle of the base plate 1, a center line 9 in the longitudinal direction and a further line 11 in the transverse direction as reference means the important reference planes at which the work products or intermediates are aligned virtually automatically when using the aid according to the invention. The line 1 1 indicates the so-called tuber plane, which plays a central role in the use of the dental device according to the invention, as will be explained in more detail with reference to the other figures. The center line 9 identifies the so-called raphe median plane.

Furthermore, in the region of the upper side of the base plate 1 opposite the supports 3 there are further markings which are used, for example, for the dimensioning of casting molds depending on the size of the dental arch or tooth model. In the region of this marking are in the illustrated preferred embodiment, three round recesses 12 on top of the base plate 3, which can be used to fix other (optional) components of the dental device according to the invention. FIG. 2 shows a perspective top view of the components of the dental device according to the invention shown in FIG. 1. Since the elements of Fig. 2 have already been explained with reference to Fig. 1, a repetition is omitted here. You can clearly see the markings or markings for the dimensioning of the molds and the center line 9 and the line 11th

It should be noted that the dental device according to the invention must be stable, so that the user can work accordingly. On the underside of the base plate 3 therefore preferably plastic or rubber knobs are embedded, which provide a stable and difficult to move positioning, especially on smooth surfaces. However, other means may be used, such as adhesive film or other releasable or firmly applied adhesives.

FIG. 3 shows the perspective top view of an upper part 20 which is part of the first preferred embodiment of the dental technical aid according to the invention from FIGS. 1 and 2. On the upper side of the upper part 20 is a solid trained guide lug 16 with two holes 17 for precise guidance of the corresponding supports 3, which protrude from the base plate 1. In the holes 17 guide sleeves 18, for example made of polytetrafluoroethylene (PTFE) or a comparable Gleitkunst- introduced, which should provide as little friction and thus an accurate and backlash-free displacement in the vertical direction. The guide lug 16 has a height above the surface of the upper part 20 of about 20 mm and a vertical notching surface in the vicinity of the opening 22 in the upper part 20, wherein the opening serves, if necessary, to pass the height adjustment screw 5. Instead of PTFE guide sleeves, roller or plain bearings can also be used to ensure the most accurate possible guidance. Instead of manual guidance, it is also conceivable to use the adjusting mechanisms of the present invention by means of drive, e.g. Form linear motors.

Approximately in the middle, the upper part 20 has two abutment elements 23 which are arranged symmetrically on both sides of a center line 24, and whose flat abutment surface, which faces away from the guide lug 16, lies exactly in the tuber plane, already with reference to FIG Fig. 1 and 2 has been described.

Between guide projection 16 and stop elements 23, the upper part 20 laterally has a respective bulge 22 a, which contributes to better handling, because thereby the View from above of the components located under the upper part 20 and a better gripping of the upper part 20 is made possible.

By means of a fixing unit 25, which is arranged on the guide projection 16 opposite side of the upper part 20, a workpiece or another component of the dental device according to the invention can be clamped to the upper part 20. In the following, the fixing unit 25 of Fig. 3 will be described in more detail.

At the open end of an elongate recess which extends from the edge of the upper part 20 in the longitudinal direction in the center about 40 mm inwardly, a mounting plate 26 is flush with the outer edge of the upper part 20, in which a set screw is rotatably inserted. The mounting plate 26 is provided with fasteners such. B. screws screwed with hexagon head on the front side with the upper part 20. The elongate recess has along the center line 24 in the axial direction of the adjusting screw 27 has a cylindrical recess in which the other end of the adjusting screw 27 is received. On the outside of the mounting plate 26, the adjusting screw 27 has a knurled head 28, by means of which the adjusting screw 27 can be rotated. On the inside of the mounting plate 26, the adjusting screw 27 has an external thread which engages in a corresponding internal thread of a retaining element 29, which in turn is displaceable by the rotation of the adjusting screw 27 in the longitudinal direction of the upper part 20 such that between the inwardly facing side of the retaining element 29 and the flat surfaces of the stop elements 23, a workpiece or another component of the auxiliary device can be clamped. The inside of the retaining element 29 is preferably provided with bevelled inner surfaces in order to be able to securely hold a plaster model by means of the fixing unit 25.

Fig. 4 shows a plan view of the underside of the upper part 20 of the dental device according to the invention. In the left in Fig. 4 area of the upper part 20 can be seen the holes 17 and the opening 22, in which the supports or columns 3 of the base plate 1 and the height adjustment 5 pass through, if the upper part 20 in any orientation, ie with the top up or with the bottom up, on the two supports 3 is placed. On the underside of the upper part 20, similar to the upper side, a center line 24 is marked, which points directly to the knurling head 28 of the adjusting screw 27 on the right-hand end of the upper part in FIG. In the substantially right half of the underside of the upper part 20, a dental arch recess 30 is formed, which serves for receiving an adhesive mass or impression compound and whose shape is similar to that of a dental arch. The depth of the dental arch recess 30 is preferably between about 2 mm and about 12 mm. Optionally, this right region of the upper part 20, in which the dental arch recess 30 is arranged, can be raised with respect to the remaining surface of the underside with a base. In any case, the two ends of the Zahnbogenausnehmung 30 are aligned with the Tuberebene, ie the Tuberebene is exactly on the (fictitious) tangent that touches the two ends of the Zahnbogenausnehmung 30.

From what has been said with regard to FIGS. 3 and 4, it can be seen that the upper part 20 of the dental technical device according to the invention can be placed on the supports 3 of the base plate 1 in two orientations, namely once with the upper side up and the other with the Bottom up. It will be explained later in this description for which purpose the different orientations of the upper part 20 are used. The material of the top 20 is preferably cast aluminum, but other metal or metal alloy may be used. Also plastic or composite material is possible.

5 shows a perspective view of the preferred embodiment of the dental technical aid according to the invention, wherein the upper part 20 is placed on the two supports 3 of the base plate 1. To ensure a possible play-free sliding of the guide sleeves 18 on the surfaces of the columns or columns 3, the guide sleeves 18 are formed of a particularly slippery plastic, such. As polytetrafluoroethylene (PTFE). In the example shown, the upper part 20 is fixed against the force of gravity by the securing element 13, which is arranged below the upper part 20 on one of the supports or columns 3. The securing element 13 is formed as a cylindrical element, which has a slightly larger diameter similar to the guide sleeves 18 as the diameter of the supports 3. In the side surface of the securing element 13, a threaded hole is introduced, in which there is a thumbscrew, by means of which the securing element thirteenth vertically fixed on the supports 3 can be kept. If the knurled screw of the securing element 13 is loosened, the upper part 20 can be easily placed further up or down and thus the distance between the surface of the base plate 1 and the upper part 20 can be adjusted exactly by means of a measuring scale (not shown in FIG. 5) and fix the upper part 20 accordingly. 6 shows a perspective view of part of the preferred embodiment of the dental technical aid according to the invention, wherein a casting mold holder 31 is placed on top of the base plate 1. The mold receptacle 31 has on its underside a number of fasteners 12 corresponding number of projections or suitable fasteners, in the embodiment shown here projections that fit into the recesses 12 on top of the base plate 1. Thus, the mold holder 31 is fixed in the horizontal direction on the base plate 1 and secured against displacement. The mold receptacle 31 has in its interior a casting mold 32, which in turn has a recess whose cross section corresponds to the base of a sprocket model base, as will be described in more detail below.

Decisive in the geometry and the arrangement of the mold holder 31 and the mold 32 is that the rear or inner wall 33 of the recess of the mold 32 is as exactly as possible in the Tuberebene, which is characterized in the base plate 1 by the auxiliary line 11. Likewise, the plane perpendicular to the base plate 1, flat surfaces of the stop elements 23 of the upper part 20 are in the tuber plane. The mold receptacle 31 advantageously has openings or holes on its underside, which serve to remove the mold 32 from the mold receptacle 31, for example by applying compressed air through the holes in the bottom of the mold receptacle 31. The mold 32 is preferably made of a flexible Plastic such as silicone, hard rubber or the like formed. Thus, the mold 32 can be easily cleaned and easily removed from the mold holder 31, but it is ensured that the mold 32 is arranged substantially free of play in the mold holder 31. For an exact positioning of the rear or inner wall 33 is given in the Tuberebene.

FIG. 7 shows a perspective view of the first preferred embodiment of the dental technical aid according to the invention, wherein in comparison to FIG. 5 the casting mold receiver from FIG. 6 is placed on the base plate 1 of the auxiliary device. Since the elements have already been explained in detail with respect to the preceding figures, a further description is omitted here.

FIG. 8 shows the first preferred embodiment of the inventive dental device according to FIG. 7 in use, in which case a mandibular dental arch model is shown 34 is formed in the mold 32 of the mold holder 31, and the matching Oberkieferzahnkranzmodell 35 is held by means of the fixing unit 25 on the upper side of the upper part 20 between the holding element 29 and stop members 23, wherein the upper part 20 with the top down on the supports 3 of Base plate 1 is inserted. It is explained below which sequential steps are to be carried out in order to obtain the plaster models 34 and 35 shown in FIG. 8. Due to the exact geometrical correspondence of the components on the base plate 1 and in the mold holder 31 and the mold 32 and on the upper side with the upper part 20, the two sprocket models 34, 35 are precisely aligned with each other, in such a way that the return - Side of the two plaster models 34, 35 in a plane, namely the Tuberebene lie.

Fig. 9 shows the two gypsum or working models 34 and 35 of the lower jaw or upper jaw, as they are placed successively after preparation with the dental technical aid according to the invention. The back walls of the two plaster models 34, 35 are aligned in one plane, the tuber plane. On the basis of these dental models, for example, the orthodontist or oral surgeon makes his analysis, considerations, advice and other activities regarding the treatment. They are also the basis for the manufacture of orthodontic appliances and are used in the dental laboratory as working models.

In the following, it is now explained by way of example how the first embodiment of the dental aid according to the invention shown in FIGS. 1 to 8 can be used to produce a plaster model, as shown in FIG. 9. It should be noted at this point that the subject matter of the present invention can still be used for further dental technology processes, eg. B. in maxillofacial surgery or implantology. The present description of the embodiments and example procedures should therefore not be considered as limiting, since the person skilled in the art will consider further advantageous embodiments and uses of the present invention. As a first step, the corresponding mold made of silicone is selected, ie it is determined whether a dental arch model of upper or lower jaw is to be cast from plaster. It has now become established in orthodontics that a Oberkieferzahnkranzmodell has a seven-cornered pedestal, wherein the rear wall or directed to the jaw vertical surface is located in the Tuberebene. In the middle plane (raphe median plane), the maxillary dental arch model faces the tuber plane and rear wall, respectively lying an obtuse angle. In a mandibular dental arch model, the pedestal is hexagonal only, with the anterior surface facing the tuberial plane being slightly rounded. The mandibular and maxillary dental arch model differ in the different shape of the plaster base in the front area, which is opposite to the tuber plane and to which the incisors are closest.

It is now assumed that with the dental device according to the invention according to the first embodiment, a mandibular dental arch model is to be made of gypsum.

Before the final maxillary dental arch model can be cast by means of the dental device according to the invention, it is still necessary to determine the size of the patient's maxillary dental arch. This is done by placing the gypsum-toothed arch or parts thereof on the base plate 1 and there on the marking for tooth arch sizes 10. Depending on the size of the cast dental arch, different sizes result for the recess in the casting mold 32. For example, there are a small, a medium and a large recess in the casting mold 32.

The corresponding selected according to the size of the maxillary arch with the seven-cornered recess is inserted into the mold holder 31 and the mold holder 31 is placed on the base plate 1, wherein the fastening means 12 engage with the corresponding recesses on the bottom of the mold holder 31 into one another, so that the mold holder 31st is held horizontally firmly on the base plate 1.

In a second step (which in principle can also take place before the first step), the underside of the upper part 20, which is removed from the supports 3 of the base plate, prepared in such a way that in the Zahnbogenausnehmung 30 an adhesive mass is inserted, the Zahnbogenausnehmung 30th as completely as possible. Supernatants of adhesive that protrude beyond the edge of the recess 30 can be removed. Subsequently, the dental arch cast from a dental impression or parts thereof on the basis of the center line 24 and the ends of the recess 30, which lie in the tuber plane, positioned in the adhesive mass in the Zahnbogenausnehmung 30 of the upper part 20 and pressed there, so that the maxillary arch of plaster in the adhesive is fixed. As adhesive, a suitable adhesive tape can also be used. Like such a dental arch made of plaster is made by means of a dental impression of silicone or alginate is not explained in detail here, as it belongs to the general expertise of an orthodontist or dental laboratory personnel. The upper part 20 is then placed with the underside down on the columns 3 of the base plate 1. The adhesive material sticks in the dental arch recess 30 and the maxillary dental arch is fixed in the adhesive mass. Subsequently, approximately the height is determined, to which the maxillary dental arch may extend from the top into the mold 32 for further processing. For this purpose, the height adjustment screw 5, the scale on the support 3 and for fixing the securing element 13 can be used.

The gypsum is prepared by means of appropriate devices in the appropriate consistency and filled into the recess of the mold 32, wherein air bubbles in plaster are to be avoided and the recess of the mold is filled about three quarters. The dental technician are known techniques for this purpose, for example by means of a vibrator, as he can form the gypsum bubble-free as possible. Subsequently, the mold holder 31 is used with mold 32 on the base plate 1.

Now, the upper part 20 along the supports 3 by means of height adjustment screw 5 is slowly moved down so that the underside of the plaster tooth arch, which is set in the adhesive mass, slowly dips into the mold. In this case, the gypsum should not run over the edge of the recess. Once the final position is reached, the vertical position of the top 20 is fixed to the pillars 3, for example by means of the securing device 13 or the height adjustment screw 5, wherein the rotation of the knurled end 7 causes the top 20 is lowered or up is moved.

After drying of the gypsum within the mold 32, the upper part 20 is then moved upwards again, whereby the adhesive mass dissolves from the plaster tooth arch. Then remove the mold holder 31 of the base plate 1, removes the finished Oberkieferzahnkranzmodell from the mold 31, and dissolves the mold 32 of the mold holder 31, for example by blowing compressed air into the holes on the bottom of the mold holder 31. At this point can supernatant or superfluous gypsum z. B. be removed from the plaster model or from the horizontal surface of the mold. Subsequently, the mold holder 31 and the mold 32 can be cleaned. On the maxillary dental arch model, plaster overhangs or remains can now be removed and the surface finish is performed. The adhesive mass in the dental arch recess 30 can be reused, whereby it should be smoothed evenly before the next use. After completion of the Oberkieferzahnkranzgipsmodell now the corresponding lower jaw dental cast stone model can be created with the aid of Oberkieferzahnkranzgipsmodell and the device according to the invention. For this purpose, the Oberkieferzahnkranzgipsmodell is clamped by means of the fixing unit 25 on the upper side of the upper part 20. The angled side surfaces of the holding member 29 may be formed as in the present case such that they substantially correspond to the obtuse angle in the middle of the Oberkieferzahnkranzmodell, so that the clamping by means of the fixing unit 25 and the stop members 23 can be made as accurately as possible. The rear wall of the upper sprocket model is due to the fixation on the stop elements 23 in the Tuberebe- ne. On the maxillary dental cast stone model, the mandibular arch is then placed in the most exact possible occlusion, ie exactly in the bite position of the patient. Subsequently, the mandibular arch or mandibular dental arch is fixed in occlusion either by means of a wax bite or by means of other positioning aids on the maxillary dental arch model. Also suitable are releasable adhesives, as they are used in orthodontics or dentistry usual wise.

The two thus interconnected upper and lower jaw tooth arches, which are fixedly arranged on the upper side of the upper part 20, are now placed with the upper side down on the two columns 3 of the base plate 1, wherein the Gießformaufnahme 31 is now provided with a mandibular mold 32, in which as described above sufficiently (about three quarters filled) plaster is present, so that the mandibular arch can be dipped accordingly in the appropriate plaster within the mold 31. The vertical position is also adjusted here by means of the height adjustment screw 5 and / or spacer sleeve 6 and can optionally be fixed by means of the securing device 13. After hardening of the plaster, the Oberkieferzahnkranzgipsmodell from the now fixed mandibular cast dental model z. B. can be solved by heating the wax. Then, the entire upper part 20 on which the upper jaw dental cast stone model is still attached is detached from the pillars 3, and the lower jaw dental cast stone model can be taken out of the mold 32. As with the Oberkieferzahnkranzgipsmodell then the mold 32 is removed by means of compressed air from the mold holder 31 and cleaned. Oberzieferzahnkranzgipsmodell 35 and lower jaw dental castor model 34 are now completed and as shown in Fig. 9 by the orthodontist or dental technician continue to be used. The manufacture of the plaster models according to the first embodiment of the present invention is thus completed.

A particular advantage of the present invention is that with the maxillary or mandibular dental cast stone model, a complete exact dental model is present, which complies with the international guidelines and rules. In particular, it is important that the plane of the plane and the corresponding side angles of the lower jaw and upper jaw reproducibly match in parallel and in terms of height exactly. This match is ensured by the geometry of the dental device according to the invention.

A detailed description of the dental appliance according to the invention in a second preferred embodiment will now be given with reference to FIGS. 10 to 17. FIG. The parts shown in Fig. 1 are identical in the first and second preferred embodiments of the present invention. Therefore, a repetition of the description of the components base plate 1 and 3 columns is omitted at this point. In contrast to FIG. 1, FIG. 10 shows another embodiment of the upper part, which is identified in FIG. 10 by the reference numeral 40. As already described with reference to FIG. 3, the upper part 40 comprises a guide lug 16 in which two holes 17 and corresponding guide sleeves 18 are provided in order to be placed and guided on the columns or supports 3 of the base plate 1. Likewise, the upper part 40 has an opening 22 through which the height adjustment screw 5 can be passed in order to adjust the height of the upper part 40 relative to the base plate 1. Unlike the embodiment illustrated in FIG. 3, the upper part 40 of the second preferred embodiment has no stop elements 23 and no adjusting device 25. For this purpose, in the right-hand and front-side section of the upper part 40 shown in FIG. 10, three holes 41 are formed, which protrude from the upper side to the underside of the upper part 40. On the underside, the upper part 40, similar to the representation in FIG. 4, for the upper part 20 has a toothed-arc recess 30 whose depth z. B. is about 12 mm. In this embodiment, the holes 41 of the upper part 40 are formed such that they are also arranged in particular in the dental arch recess 30. In the front region or in the area of the holes 41, the upper part 40 is slightly less thick than in the rear part. However, this does not necessarily have to be the case. In the rear portion, ie behind the guide lug 16, the upper part 40 may be free at the corners, so that forms a handle approach. This handle attachment serves to be able to grip the upper part 40 behind the guide lug 16 with the fingers.

Placed on the base plate 1 is a fastening device 42, the z. B. can serve to fix a cast-upper or mandibular cast-stone model or a Artikulatorgipsmodells. The fastening device 42 has a holding plate 45, at one end of which two stop elements 44 and at the other end an adjusting device 43 are arranged. The holding plate 45 is slidably and rotatably mounted on a flat spacer plate so that the fixing device 42 is movable forward, backward, laterally and about a fulcrum with respect to the base plate 1. The adjusting device 43 is similar to the fixing unit 25, which has already been described in detail with reference to FIG. A fastening plate 46 is screwed onto the retaining plate 45 at the end face by means of two screws, wherein the fastening plate 46 has a bore in the middle, through which an adjusting screw is guided with a knurled head 48. The adjusting screw is rotatably mounted in the interior of the recess in the holding plate 45 at the closed end and has an external thread. On the external thread of the adjusting screw an upstanding support member 49 is arranged, which in turning the knurled head 48 of the adjusting screw in the longitudinal direction, d. H. can move axially along the adjusting screw. Thus, a plaster model or other part used in the dental treatment can be fixed on the holding plate 45 by the holding member 49 and the stopper members 44. The fastening device 42 can be fixed by means of corresponding projections in the recesses 12 on the base plate 1. It should be noted that, instead of the fastening device 42, a construction other than a fastening device can be used in order, for example, to hold a plaster model on the base plate 1, if appropriate by means of an intermediate plate.

The use of the second preferred embodiment of the dental aid according to the invention will now be described in greater detail with reference to FIGS.

In FIG. 11, an articulator plaster model 47 is fastened in the fastening device 42 by means of the adjusting device 43. The articulator plaster model is in the example shown Plaster model of a maxillary dental wreath. The use of an articulator is well known in orthodontics. Articulators are devices for simulating the temporomandibular joint movement, wherein plaster models of the dental arches of the upper and lower jaw are mounted in the bite position, ie in occlusion in the articulator. Thus, the movement of the pines can be simulated to each other. The plaster models of upper and lower jaw are removable from the articulator and should be used as shown here in the dental device according to the invention. In particular, it is advantageous that the processing can be carried out with the aid of the invention regardless of the manufacturer of the articulator. This saves additional tools and therefore costs. Any other type of tooth models can also be arranged in the fastening device 42.

The aim of the use of the second preferred embodiment of the dental device according to the invention is the creation of a so-called setup model, which should represent the ideal or desired position of corrected in position teeth of the upper and lower jaw. As a result, the setup model includes two plaster models which are compatible with one another in such a way that the ideal position of the teeth of a patient can be represented, so to speak, at the end of an ideal dental treatment.

As already mentioned above, the articulator plaster model 47 of the upper jaw is inserted into the fastening device 42 and fixed there. Optionally, between spacer device 42 and base plate 1, a spacer or intermediate plate may be used, which allows a horizontal displacement of the fastening device 42 not only in the longitudinal direction, but also laterally or about a pivot point. Subsequently, the upper part 40 is placed on the pillars 3 of the base plate 1 and lowered accordingly until the dental arch of the upper dental arch model projects into the dental arch recess 30 of the upper part 40. It should be noted that the depth of the recess 30 in the second preferred embodiment is about 12 mm, as opposed to about 2 to 3 mm in the first embodiment. The position of the articulator plaster model 47 can now be aligned in particular in the longitudinal direction such that the dental arch of the upper jaw is optimally arranged in the dental arch recess 30 of the upper part 40 and thus aligned with the tube plane. Subsequently, the upper part 40 is removed again from the entire device. In the dental arch recess 30 soft (kneadable), preferably self-curing silicone is now filled to obtain an impression of the maxillary dental arch. The maxillary arch is here the dental arch in the so-called malocclusion, ie in the actual tooth position before the orthodontic treatment. The silicone is introduced into the dental arch recess 30 in such a way that it fills the entire space and protrudes somewhat beyond the surface of the upper part 40, as shown in FIG.

Subsequently, the entire upper part 40 is placed upside down on the pillars 3 and moved down until the silicone surface engages the upper jaw tooth arch of the articulator plaster model 47 and the impression in the silicone is sufficiently formed. The maximum indentation or subsidence of the upper part 40 can be adjusted accordingly by means of the height adjustment screw 5 and the spacer sleeve 6 mounted thereon. This prevents the articulator plaster model from penetrating too deeply or too little deeply into the silicone of the dental arch recess 30. The securing device 13 can be used as a stop. After curing of the silicone, the top 40 is removed upwardly, forming an exact maxillary dental arch impression in the silicone.

FIG. 13 shows the position before the upper part 40 is lowered onto the articulator plaster model 47, and FIG. 14 shows the position where the upper part 40 is lowered completely onto the articulator plaster model 47 and the imprint of the upper jaw arch in the silicone causes. Fig. 15 shows the final result with the top 40 removed. It is clearly seen the negative impression of the maxillary dental arch in the silicone material. Such an imprint is also called a key, in which case a so-called malocclusion key has been generated.

This silicone key 51 is then freed from superfluous silicone material by means of a scalpel in such a way that a substantially planar surface is present laterally of the dental impressions. It is important to ensure that not too much or not too little silicone material is taken away. The decisive criterion here is that when inserting the individual teeth still to be created, they must also hold in the silicone key when the upper part 40 is turned upside down, ie with the teeth downwards again resting on the columns of the base plate. The teeth from the articulator plaster model 47 are now detached from the plaster base by a saw and separated. Here, the operator makes use of optionally attached auxiliary lines on the teeth or the underlying material. In order not to lose track, it makes sense to label the teeth with their corresponding labels or identification drawings according to generally used nomenclature. Each tooth 52 is first detached from the dental arch with a saw and then machined with a milling head until each underside of a tooth has, for example, a characteristic, tapered wedge tip intended to represent a tooth root. Each tooth 52 is then inserted back into the silicone key 51. Since the cured silicone is easily yielding, you can press the teeth 52 well in the silicone key 51, so that they do not fall out of the silicone key even when turning the upper part 40 and there are sufficiently recorded for further processing.

Subsequently, the jaw base 53 freed from the dental arch is provided with wax on the sawed, substantially flat surface, and the upper part 40 is placed on the columns 3 of the base plate 1 again with the silicone key 51 and teeth 52 inserted therein at the correspondingly adjusted height. Fig. 17 shows this position.

Subsequently, the exposed tooth roots in the free space between the silicone key 51 and jaw base 53 are connected by means of wax or similar releasable adhesive to the jaw base 53 such that the wax is arranged around the teeth like a kind of gums and this sufficient on the jaw base 53rd fixed. Once the wax or the adhesive has cured, the silicone key 51 can be detached again from the jaw base 53 with teeth. For this it may be necessary for the silicone to be heated accordingly or treated in a different way. The result of this step is an articulator plaster model with malocclusion teeth in wax. The silicone key 51 can be easily detached from the upper part by means of an ejector device (not shown) which acts, for example, on the holes 41 on the upper side of the upper part 40, without damaging the key surface.

The steps illustrated in FIGS. 11 to 17 are now carried out in the same way for the articulator plaster model of the lower jaw. One thus receives in each case an articulator plaster model of the upper or lower jaw in malocclusion, wherein the individual teeth are arranged by means of wax on the jaw base made of gypsum. The purpose of the material is wax (or a comparable material with the same essential properties) It is that now in the further processing in the articulator, the individual teeth by heating the wax below or around the tooth around in their position, ie angle of attack, angle of rotation, etc. can be changed. Ultimately, you can get to the ideal model as it provides the orthodontist as a target position for the teeth of each jaw.

The above-described use of the second preferred embodiment of the dental device of the present invention is merely illustrative of a variety of potential uses that one skilled in the art may contemplate. Alternatively, for example, from the malocclusion key made of silicone with teeth inserted therein, a gypsum / wax model by means of gypsum shell and plaster mold, as described in detail in the first preferred embodiment, created. For this, e.g. The plaster mold is first poured with a plaster layer about 1 cm deep and with an overlying wax layer into which the "tooth roots" or tooth stumps are dipped. This saves the manual trowelling of the teeth with wax as described above. In this case, a new silicone key with optimized occlusion or setup occlusion can be created from the aligned teeth in the gypsum / wax model using the procedure described above. This new silicone key is also called a setup silicone key. In order to accelerate the dental laboratory processes, in certain embodiments, a plurality of supports or support pairs can be arranged on an enlarged carrier or base plate, so that, for example, three upper parts can be attached simultaneously to the corresponding supports in different configurations. This makes it possible, for example, to make several models substantially in parallel, which allows further time savings.

The dental device of the present invention therefore offers a wealth of uses for orthodontic, orthodontic, dental or implantological model fabrication and modification. Thus, the dental laboratory and diagnostic processes can be streamlined, accelerated and made more economical, while the required precision and fine adjustment is guaranteed and can be increased compared to the previous methods.

Claims

claims

Dental aid having a base plate (1) on which at least one support (3) is arranged vertically, an upper part (20, 40) formed as a plate, the at least one guide in which the at least one support (3) of the base plate (1 ), a center line (9) and on its underside a recess (30), wherein the upper part (20, 40) with downwardly or upwardly directed underside parallel to the base plate (1) is displaceable, and wherein the base plate ( 1) and the upper part (20, 40) have reference means (11, 23) aligned with a tuber plane, the tuberial plane being perpendicular to the base plate (1) at a predetermined distance from the at least one support (3) to the center line (9) is defined.

Dental aid according to claim 1, characterized in that the reference means on the top of the base plate (1) in the form of a marker (1 1) are applied.

Dental aid according to one of the preceding claims, characterized in that the reference means on the upper side of the upper part (20, 40) is designed as a stop element (23) whose abutment surface is located substantially in the tuber plane.

Dental aid according to one of the preceding claims, characterized in that the reference means on the underside of the upper part (20, 40) through the recess (30) are formed, wherein the recess (30) is formed in a tooth-arc shape, that the two ends of the dental arch lie essentially in the Tuberebene.

5. Dental aid according to one of the preceding claims, characterized in that it comprises a mold holder (31) with a casting mold (32), wherein the casting mold (32) has a casting recess and is fixable on the base plate (1), a rear wall (33) of the pouring recess lies in the tuber plane.

6. dental aid according to claim 5, characterized in that the mold holder (31) is formed of cast aluminum and its bottom has at least one opening and at least one projection in a corresponding number of recesses (12) in the base plate (1) Fixation of the mold holder (31) intervene.

7. Dental aid according to one of claims 5 to 6, characterized in that the casting mold (32) is formed of silicone.

8. Dental aid according to one of claims 5 to 7, characterized in that the casting mold (32) is formed from two or more components. 9. Dental aid according to one of claims 5 to 8, characterized in that in the bottom of the Gießausnehmung the mold (32) is a logo or lettering is formed.

10. Dental aid according to one of the preceding claims, characterized in that on the upper side of the upper part (20, 40) a fixing unit (25) is arranged for fixing a sprocket model.

1 1. Dental aid according to one of the preceding claims, characterized in that the base plate (1) comprises a Höhenverstellansatz (4), which is designed as a cylindrical projection with external thread, and on the one

Height adjustment screw (5) and one or more spacers (6) are placed. Dental aid according to one of the preceding claims, characterized in that the material of the base plate (1) and the upper part (20, 40) comprises aluminum.

Dental aid according to one of the preceding claims, characterized in that the upper part (20, 40) on the at least one support (3) by means of a securing element (13) is fixable.