DE102010017169A1 - Dental model-support system for holding dental model, has split-cast-plate that is arranged in articulator and base plate that is provided for receiving dental model - Google Patents

Abstract

The dental model-support system (1) has a split-cast-plate (2) that is arranged in an articulator and a base plate (3) that is provided for receiving a dental model. The base plate is connected with the split-cast-plate. The projection (5) is upwardly tapered in one of the upper surfaces from the direction facing the split-cast-plate and the base plate in a sectionally curved manner. Independent claims are also included for the following: (1) a split-cast-plate with rear side of a bar; and (2) a base plate with recesses.

Description

The invention relates to a dental model carrier system with a base plate and a split-cast plate for holding a dental model and a base plate and a split-cast plate for a dental model carrier system.

Dentures or dental devices for malocclusion are adapted by means of a dental model and a dental model carrier system for an articulator with which the bite and the chewing motion can be simulated. Both work on the dental model and on the dentures or the dental apparatus are necessary.

At present, it is known to produce carrier systems for dental models in two parts. A first part, the split-cast plate, is firmly fixed in the articulator. A second part, the base plate, serves as a support plate for the dental model and is releasably connected to the split-cast plate to enable good machining of the dental model.

To edit the dental model, dentures or dental equipment, the base plate is separated from the split-cast plate, so that all adjustment work can be easily performed. Subsequently, the base plate comprising the dental model is connected to the split-cast plate in order to control the accuracy of fit, for example of the dental prosthesis, with the articulator. It must be ensured that the base plate always occupies the same position in the articulator despite multiple separation and reconnection with the split-cast plate. For this purpose, mutually corresponding projections and depressions are arranged on the surfaces in the plates known from the prior art, which are to ensure an exact fit of the plates to each other.

In the previously known support systems for dental models too large tolerances between the projections and recesses are often present, so that after each release and reconnect the base plate is not guaranteed that the dental model again occupies the same position relative to the split-cast plate. In addition, the already known cross sections of the recesses and projections usually have a polygonal shape, which require only consuming to be cleaned corners and edges.

The invention has for its object to provide a dental model carrier system, which ensures even after repeated removal and placement always the same position of the base plate for split-cast plate. It is a further object of the present invention to provide a split-cast plate and a base plate for such dental model carrier systems.

This object is achieved by a dental model carrier system according to claim 1, a split-cast plate according to claim 10 and by a base plate according to claim 13. Advantageous developments of the invention are specified in the dependent claims.

The dental model carrier system according to the invention has a split-cast plate which can be arranged in an articulator and a base plate which can be connected to the split-cast plate and is provided for receiving a dental model. At least one recess is arranged on one of the split-cast plate and the base plate, and at least one projection on the other of the split-cast plate and the base plate, the projection being formed at least in sections corresponding to the depression. The projection may, for example, be arranged on the baseplate and the recess on the split-cast plate, whereby a reverse arrangement or an arrangement of projection and recess on the baseplate and corresponding projection and recess on the split-cast plate can be executed is. According to the invention, the projection is tapered in an arcuate manner, at least in sections, in a direction away from the surface of the other of the split-cast plate and the base plate.

In order to prevent in the collapsed state of the plates twisting, tilting or against each other moving the plates to each other, the projection and the recess are formed correspondingly. That is, the projection may be partially or completely received by the recess and is supported on at least one surface in the recess. In this case, the projection and the recess may be formed so that they touch, for example, the entire surface. Preferably, however, the projection and the recess are formed so that in the collapsed state of the plates only certain portions of projection and depression touch, to prevent a double fit between the plates.

The projection and the corresponding recess can be designed very different. There are, for example, pyramidal, conical, cylindrical or generally polygonal cross-sections - based on a plane perpendicular to the plate surface level - possible. According to the invention, it has been found that projections which have an arcuate upwardly directed taper at least in sections are particularly suitable for restoring the exact seating of the base plate on the split-cast plate even after repeated removal and placement of the base plate. One through the arcuate taper resulting rounding causes a particularly easy merging of the plates. The plates are guided by the arcuate taper in the correct position, similar to a slide together, so that a particularly advantageous protection against incorrect placement, rotation or displacement of the plates is achieved to each other. It is also advantageous that can be particularly well cleaned by the present invention arcuate taper on the projection and the recess, the respective surfaces of the plates, as there are significantly less difficult to reach corners or angles than in known Dentalmodellträgersystemen available.

The height of the projection is usually limited only by the thickness of the receiving plate, although it is possible to choose the projection so high that it protrudes through the plate with the recess. Here, the recess would be formed as a hole. However, particularly preferred is a height which is about one third to two thirds of the receiving plate thickness. This ensures an automatic collapse, the plates are easy to clean and the overall stability of the plates is particularly high.

The number of protrusions and depressions can be chosen freely. So it is, for example, possible to arrange a plate completely circumferential projection in the manner of a web. Also, a projection that rotates only a certain portion of the plate is conceivable. Preferably, three to seven individual projections, particularly advantageously five projections at a uniform distance from one another, are arranged on the surface of the plate. In the arrangement of a plurality of projections and / or depression both projections and depressions may be arranged on one of the split-cast plate and base plate and on the other of split-cast plate and base plate to the respective corresponding projections and depressions.

The arcuately tapering portions according to the invention at the projections may be of different shape. Thus, for example, it is possible to let the arcuate portion begin substantially directly on the plate or only at a certain distance from the surface of the plate on the projection. Particularly preferred is an arcuate portion which begins at the surface of the plate and tapers upwards, since the automatic merging is particularly well done by this.

The center, which is based on the radius of the curved section, can be arranged at any desired location, even outside the projection. It is also possible to produce the arcuate portion with different radii, wherein, for example, the center of a first radius within the projection and the center of a second radius can be arranged outside the projection. Arrangements are also conceivable in which all center points lie within or all centers outside the projection.

Advantageously, an embodiment in which on the surface of an arcuate portion begins, the center of which lies outside the projection and adjoins this portion, a further arcuate portion whose center lies within the projection.

Further, it is possible to arrange different radii on the arcuate portion, but having a common center. For example, elliptical shapes are also conceivable for the curved section.

According to a particularly advantageous embodiment of the invention, the arcuate taper has a constant radius relative to a common center. Particularly preferred is an arcuate portion of constant radius, which begins at the surface of the plate and tapers upwards.

The bow-shaped taper according to the invention can extend over the entire circumference of the projection. However, it is also only partially, for example. One or more arcuate tapers on a projection possible. Preferably, however, a continuous arcuate taper on the projection, wherein the projection is formed as a hemisphere, dome or spherical segment. These forms are particularly easy to produce, provide a particularly simple and easy merging of the plates and allow the quick and easy cleaning of the plate surfaces after processing.

As it is possible to let the arcuate taper start only at a certain distance from the surface, so it is also possible to limit the arcuate taper upwards.

According to a particularly advantageous development of the invention, a plane adjoins the arcuate section. The plane may be oriented differently to the surface of the plate. For example. For example, the plane may be oriented at an acute or obtuse angle to the surface. Even a multiply divided plane with, for example, a partial surface of the plane with acute and a partial surface with an obtuse angle to the surface is conceivable. However, particularly preferred is a plane which is aligned parallel to the surface and thus forms a flattening of the projection. This will prevents a double-fitting in a particularly reliable manner and creates a cavity between the projection and the recess.

According to a particularly preferred embodiment of the invention, the dental model carrier system has a cavity between the projection and the recess. The cavity can be generated, for example, by a slightly different size of the projection relative to the recess. It is technically easy to do, for example, the depression slightly lower than the projection form, all forms and shape deviations are possible. Particularly preferably, the cavity is created by the already described, parallel to the surface oriented plane on the projection. Through the cavity on the one hand in a very simple way, a double fit between the projection and recess can be avoided and on the other prevents this, for example, after working still existing dirt particles on the projection or in the recess interfere with the exact assembly of the plates.

The orientation of the projection on the plate can be chosen arbitrarily. The projection can be arranged in the plate interior, d. H. it is arranged so that it does not touch the plate outer edge or it is aligned so that it is adjacent to the plate outer edge or protrudes beyond this. Thus, for example, hemispherical or dome-shaped projections can be regularly distributed over the surface of the plate. In the case of the dental model carrier system, however, it is advantageous for the user if he sees the projection and the recess in the assembled state. For this reason, in a particularly preferred embodiment of the invention, the projection extends from a plate outer edge to the plate interior.

If the arcuate taper does not completely encircle the projection, the orientation of the arcuate taper can be in different directions. For example. this may be aligned to the plate outer edge or to a second projection. However, particularly preferred is a directed towards the plate interior arcuate taper. In this context, the plate interior is not necessarily meant to mean the center of the plate but the entire area enclosed by the plate outer edge.

According to a particularly preferred embodiment of the invention, the projection has the shape of a flattened quarter-sphere segment, the projection extending from the outer edge of the plate to the interior of the plate and showing the arcuate taper to the plate interior.

The split-cast plate and the base plate can be made of different materials and by different methods. Thus, for example, different plastics, metals or ceramics can be used. For the production of the plates are, for example, injection molding, casting or milling process. The production of plastic panels has been established by means of an injection-molding process. In particular, the base plate and the dental model can be formed from plaster, for example, be milled out of a gypsum blank, wherein the base plate and the dental model can be formed both as separate components, but also in one piece.

Thus, the base plate can be removed during the processing of the dental model from the articulator and detached from the split-cast plate, a detachable connection between the two plates is required, which must be prevented in the assembled state accidental disconnection. According to a particularly preferred embodiment of the invention, a locking device is provided for this purpose. The locking device consists for example of two mutually engageable components, wherein a component is arranged on the base plate and a component on the split-cast plate. Both components work together in such a way that, when the split-cast plate and the base plate are folded together, a firm hold is created, which can easily be released again. The hold can be made, for example. Screws, pins, Velcro or a push-button type connection. Particularly preferred is a locking device, which is designed as a magnet with a magnetic counterpart. Both the magnet and the magnetic counterpart may be located in both the split cast plate and the base plate. Since the split-cast plate is preferably designed as a reusable plate and the base plate usually as a disposable plate and a particularly cost-effective design is sought, the magnet is preferably arranged in the split-cast plate, while the magnetic counterpart is fixed to the base plate , In this way costs for the much more expensive magnet can be saved.

The alignment of the locking device on the plates can be done arbitrarily. It is conceivable, for example, to distribute a plurality of small locking devices uniformly or non-uniformly over the surface of the plate and thus to achieve locking over several points. However, the locking device is particularly preferably arranged in the center of the respective plate. Thus, a uniform-acting, well-adherent locking is achieved.

The locking device can, for example, by screwing, drilling, gluing, hooking or Similar to be attached to or in the respective plate. In this case, fastening on the surface or incorporation into the plates is conceivable in particular. However, particularly preferably recesses are already introduced into the plate during plate production, which preferably correspond to the shape of a locking device to be introduced. In these recesses, it is possible to fix the components of the locking device by, for example. Gluing, welding, clamping or hooking. Particularly preferably, the metallic counterpart is welded or glued into the respective recess and the magnet detachably fastened, in particular by screws in the respective recess.

Thus, the locking of the two plates can be done to each other particularly reliable, according to a particularly preferred embodiment of the invention in addition to the locking device still a guide device - which consists of additional components - arranged on the plates. In this case, for example, a slide can be inserted into a plate which cooperates with a pin on the other plate. For example. the pin can be guided in the slide rail.

According to a preferred embodiment of the invention, the guide device is designed as a recess and socket. The recess is here in a plate, for example. The split-cast plate, introduced while the base of the surface of the other plate, for example. The base plate, protruding. Particularly preferred is an annular recess which is arranged coaxially to the locking device and a base which has the shape of a ring segment and is also arranged coaxially with the locking device on the other plate. The base engages when folding the plates in the annular recess. As a result, a particularly precise interaction of Arretierungsbestandteile comes about.

Further, the invention comprises a split-cast plate for a dental model carrier system having a protrusion protruding from the surface or a recess extending from the surface for connection to a base plate. Characteristic of the split-cast plate according to the invention is that the projection, starting from the surface at least partially tapers arcuately.

On the surface of the split-cast plate, a base plate can be locked. The projection or recess are particularly suitable for ensuring accurate positioning of the base plate on the split-cast plate. They are designed so that a locked to the split-cast plate base plate, for example. Is secured against displacement or rotation relative to the split-cast plate. For this purpose, the projections or recesses may be formed differently. For example. For example, the protrusions or recesses may have polygonal cross sections. According to the invention, however, the projections or depressions are at least partially tapered arcuate.

The arcuately tapered sections may be arranged on portions of the projection or of the recess or on the entire projection / recess. The arcuate portions may begin at the projection at a distance from the surface. Preferably, however, they start directly at the surface of the plate.

The split-cast plate is suitable to be fixed with its back in an articulator. This can be done, for example, by screws, pins or similar mechanical fasteners. Mostly, however, the attachment of the split-cast plate is done by means of plaster, which fixes the split-cast plate in the articulator by its adhesive force.

So that the split-cast plate is fixed particularly securely in the articulator by the plaster, for example, holes or recesses may be arranged on the split-cast plate, in which engages the plaster. According to a particularly preferred embodiment, a web is arranged on the back of the split-cast plate, on which the plaster can attack particularly well. Through the bridge a positive connection is made possible between the split-cast plate and the plaster in the cured state.

After the split-cast plate is preferably designed as a reusable assembly of the dental model carrier system, a simple way to remove the gypsum from the split-cast plate after completion of the work is beneficial. According to a particularly preferred embodiment, the web is tapered in cross section for this purpose. The taper can be both arcuate and rectilinear and, for example, in the direction of the projections and / or recesses having surface opposite surface (back) of the plate taper.

Particularly preferably, however, the web tapers at least in sections starting from the surface of the rear side upwards. An upwardly tapering bridge offers the advantage that it is particularly easy to get rid of the plaster residues.

Furthermore, the invention comprises a base plate for a dental model carrier system, with a protrusion projecting from the surface and / or a recess running opposite to the surface for connection to a split-cast Plate. Characteristic of the base plate according to the invention is that the projection and / or the recess, starting from the surface at least partially tapers arcuately.

The projections or recesses are preferably formed corresponding to those of the split-cast plate according to the invention. For attaching a dental model to the base plate, coupling means such as screws, glue, hook and loop or clamps can be used, which are arranged on the rear side of the base plate. However, particularly preferred coupling means are provided which are formed corresponding to each other. The coupling means may, for example, be formed by circular recesses, for example bores and retaining pins designed in accordance with the circular recesses. In this case, both the retaining pins and the circular recesses may be arranged on the base plate and / or on the dental model.

By means of the coupling means, it is possible to detachably connect the base plate and the dental model or dental model parts in the manner of a plug connection, whereby it is particularly reliably ensured that after each reconnection the dental model is arranged in the same position on the base plate.

The coupling means can basically be arranged arbitrarily on the base plate and the dental model. According to one embodiment, circular recesses are incorporated like a grid in the base plate. Alternatively, retaining pins may be arranged at regular or irregular intervals on the base plate. However, the coupling means are particularly preferably arranged in the form of an ellipse or circular arc in accordance with the bit form. This embodiment of the invention makes it possible to arrange even small dental model parts particularly reliable on the base plate.

The base plate, like the split-cast plate, can be made of different materials. Particularly preferably, the base plate is integrally worked out together with a dental model of a blank, which consists of gypsum.

In the following, details of the invention will be explained in more detail by means of exemplary embodiments. In the drawings show

1 a perspective view of an embodiment of a dental model carrier system overlooking a rear side of a split-cast plate;

2 , a perspective view of an embodiment of a dental model carrier system with a view of a back side of a base plate;

3 a perspective view of the embodiment of a surface of the base plate of 1 and 2 ;

4 a perspective view of the embodiment of a surface of the split-cast plate of 1 and 2 ;

An in 1 and in 2 illustrated dental model carrier system 1 has a split-cast plate 2 and a base plate 3 with a nearly semicircular basic shape. The split cast plate 2 and the base plate 3 lie with their surfaces 6a . 6b to each other. On the base plate 3 are five tabs 5 arranged in a corresponding recess 4 at the split-cast plate 2 intervention. Between every projection 5 and the associated recess 4 is in the assembled state of the split-cast plate 2 and the base plate 3 a cavity 14 educated. At the back 17 of the dental model carrier system 1 There are two oval cutouts 18 , in by hand or with a suitable tool for releasing the locked plates 2 . 3 can be intervened.

The five tabs 5 on the base plate 3 extend are from the outer edge 19a to the plate interior 10 , The arcuately tapering sections 7 show to the plate interior 10 , have a constant radius around one center each, within the projection 5 lies and have above the arcuately tapered section 7 one to the surface 6a the base plate 3 parallel plane 8th , The projections 5 thus have the shape of flattened quarter-sphere segments (see. 3 ).

The to the projections 5 corresponding depressions 4 are at the split-cast plate 2 arranged. The wells 4 also have a quarter spherical shape, but are not flattened, ie they have none to the surface 6b parallel plane (cf. 4 ).

Through the flattened plane 8th at the projections 5 exists in the assembled state of the base plate 3 at the split-cast plate 2 the cavity 14 between projection 5 and deepening 4 , At the plates 2 . 3 can each one part in the middle 20a . 20b a locking device can be arranged. For this purpose, the base plate 3 a recess 11 on, in which an annular metallic counterpart (not shown here) glued or welded or pressed. Coaxial to the first part 2oa the locking device on the base plate 3 is another annular recess 12a arranged, which serves as a guide.

A second part 10b The locking device can be centered in the split-cast plate 2 to be ordered. This is in the split-cast plate 2 a circular recess 13 introduced, in which a magnetic disk can be fixed by means of a screw. When mounting the base plate 3 at the split-cast plate 2 The forces of the magnet act on the metallic counterpart, leaving the plates 2 . 3 locked together. Around the recess 13 at the split-cast plate 2 is a pedestal 12b arranged, which has the shape of a curved web. The base 12b engages when folding the split-cast plate 2 and the base plate 3 in the annular guide 12a one.

To edit a dental model (not shown here) this is on the back 15b the base plate 3 attached. The backside 15a the split cast plate 2 is attached with plaster in the articulator (not shown here). So that the plaster the split-cast plate 2 can fix very securely and firmly on the split-cast plate 2 Stege 16 arranged. The bridges 16 run on the back 15a the split cast plate 2 on the one hand arcuate and parallel to the plate outer edge 19b and secondly as straight lines, at least partially with the arcuate webs 16 keep in touch.

Claims (14)

Dental model carrier system ( 1 ) for holding a dental model with - a split-cast plate which can be arranged in an articulator ( 2 ) - one with the split cast plate ( 2 ) connectable, provided for receiving a dental model base plate ( 3 ), where - on one of split-cast plate ( 2 ) and base plate ( 3 ) at least one depression ( 4 ) and at the other of split-cast plate ( 2 ) and base plate ( 3 ) a lead ( 5 ) is arranged, which - at least partially corresponding to the recess ( 4 ), characterized in that the projection ( 5 ) in one of the surface ( 6a . 6b ) from the other of split-cast plate ( 2 ) and base plate ( 3 ) facing away from at least partially curved upwards in an arcuate manner. Dental model carrier system according to claim 1, characterized in that the arcuate portion ( 7 ) has a constant radius from a center. Dental model carrier system according to claim 1 or 2, characterized in that at the arcuate portion a plane ( 8th ). Dental model carrier system according to one of the preceding claims, characterized in that a plane ( 8th ) parallel to a surface ( 6a . 6b ) the other of split-cast plate ( 2 ) and base plate ( 3 ) is aligned. Dental model carrier system according to one of the preceding claims, characterized in that the projection ( 5 ) from a plate outer edge ( 9 ) to the plate interior ( 10 ). Dental model carrier system according to one of the preceding claims, characterized in that the arcuate taper ( 7 ) to the plate interior ( 10 ) is aligned. Dental model carrier system according to one of the preceding claims, characterized in that the projection ( 5 ) as a quarter-sphere segment with a flat surface ( 8th ) is trained. Dental model carrier system according to one of the preceding claims, characterized by a split-cast plate ( 2 ) with the base plate ( 3 ) releasably connectable locking device ( 20a . 20b ). Dental model carrier system according to one of the preceding claims, characterized in that between the projection ( 5 ) and the depression ( 4 ) a cavity ( 14 ) is trained. Split-cast plate ( 2 ) for a dental model carrier system ( 1 ) according to one of the preceding claims, with one of a surface ( 6a . 6b ) projecting projection ( 5 ) or one opposite the surface ( 6a . 6b ) deepening ( 4 ), for connection to a base plate ( 3 ) characterized in that the projection ( 5 ) starting from the surface ( 6a . 6b ) at least partially tapered arcuately. Split-cast plate according to claim 10, characterized in that on the projection ( 5 ) or the depression ( 4 ) having opposite side ( 15a ) a footbridge ( 16 ) is arranged. Split-cast plate according to claim 11, characterized in that the web ( 16 ) starting from the surface of the back side ( 15a ) at least partially tapered upwards and / or downwards. Base plate ( 3 ) for a dental model carrier system ( 1 ) according to one of the preceding claims, with one of a surface ( 6a . 6b ) projecting projection ( 5 ) or one opposite the surface ( 6a . 6b ) deepening ( 4 ), for connection to a split cast plate ( 2 ) characterized in that the projection ( 5 ) starting from the surface ( 6a . 6b ) at least partially tapered arcuately. Base plate according to claim 13, characterized in that at the surface opposite side circular recesses and / or from the surface of the opposite side projecting retaining pins are arranged.

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