DE9206957U1 - SPLIT CASE PLATE FOR DENTAL ARTICULATORS - Google Patents

Description

Split cast plates in so-called articulators or denture simulators ensure that, on the one hand, a jaw model is preferably fixed by means of a magnetic hold, and, on the other hand, that a so-called control base method can be carried out, which detects whether a bite registration obtained from a patient was carried out correctly.

It is still the state of the art in dentistry that a so-called split cast relief is cut into the jaw model, whereby the preferred plaster connection to the articulator is then detachably created using an insulating agent, whereby the connection between the model base and the jaw model is then established using an adhesive strip or similar during the phase of working in the articulator.

For some time now, however, it has been common practice to connect the jaw model and the corresponding model base by means of a magnetic hold, whereby a magnetic cup system is preferably housed in the jaw model or the model base, which corresponds to a ferromagnetic retention plate integrated in the associated (plaster) body and thus ensures the hold.

Since the beginning of the 1990s, it has also been state of the art to produce so-called split cast plates mechanically with high precision, which allow several jobs to be produced simultaneously in one articulator by using a master or mother plate with an integrated ferromagnetic retention plate to carry out several dental jobs simultaneously by exchanging the corresponding jaw models.

Initially, this method was only useful for synchronizing the same articulator types, whereby the same applicant only made it possible to exchange jaw models in different articulator types with regard to the hinge axis and skull using a corresponding kit.

Ultimately, however, the state of the art was still to have open magnet systems integrated into the splitcast plate, so that it was not possible to plaster jaw models directly onto the splitcast plate without the risk of contamination of the magnet pot system.

The same author therefore developed a plate that contains a magnet pot system integrated away from the splitcast plate and is therefore suitable as a so-called mother plate for producing a connecting base (gypsum mater) with retention plates, preferably made of gypsum, via a rubber sleeve. However, no patent claim was made for this design of a mother plate.

With a new process and a new kit for synchronizing the hinge axis and centricity of different articulators, also from the same applicant, a split-cast plate has now been described for the first time, in which a magnet or a magnet pot system is embedded on the articulator side, whereby the correct positional connection of the respective split-cast plate with its articulator arm is established by a connecting medium through one or more recesses with corresponding retentions.

Of course, this also makes it possible to align purely in terms of centricity. And this type of approach also offers the possibility of designing a split-cast plate differently by integrating articulator-specific holes or recesses that allow a connection to an articulator arm, while the counter-plate is suitable for compensating for differences caused by production.

The object of the invention is therefore to describe a split cast plate which is made of non-ferromagnetic material and contains an integrated magnet whose field lines pass unhindered through the preferably paramagnetic material and establish the connection to the retention element of the model base. Since the split cast plate is additionally mechanically and chemically protected on the split cast plate side, preferably by a surface treatment, there is no longer any risk of the magnet pot system becoming dirty. This makes it possible to dispense with the use of a mother plate and to install the jaw model directly into the articulator, for example with so-called articulation plaster, via an appropriately shaped ferromagnetic retention element.

As a special feature, the retention on the splitcast side to the articulator connection medium was created in order to align articulators of different construction by having the recess(es) on the articulator side preferably completely or partially negatively conical.

A retention nut was preferably described on the articulator side. However, it is entirely conceivable to replace the retention nut with a differently shaped retention element that is optimally dimensioned and/or designed (e.g. box-shaped with an all-round undercut edge or similar and in different thicknesses) that creates the connection to the splitcast plate, which in such a case is shaped like a slide on the articulator side and has retention elements on the edge. In view of the large number of possibilities, a more detailed description has been omitted.

The invention will now be explained in more detail with reference to claims 1-13.

Show

Figure 1 shows a schematic view of a possible splitcast plate in plan view,

Figure 2 shows a schematic of a built-in

Splitcast plate in longitudinal section when using a magnet,

Figure 3 schematically shows a variant of a

Splitcast plate (1) in longitudinal section.

Figure 4 shows a detailed sectional drawing

a split cast plate for aligning the hinge axis and centricity of unlikely constructed articulators,

Figure 5 essentially schematically shows an articulator-side view of the splitcast plate of Figure 4.

Figure 1 shows a schematic view of a possible splitcast plate (1) in plan view. We can see the relief (2) and, in the illustrated example, the position of the magnet (3) used or the magnet pot system used.

Figure 2 shows a schematic representation of a split cast plate (1) installed in the articulator (8) in a longitudinal section using a single magnet. The split cast relief (2) of the split cast plate (1) is cut, in the embodiment shown only a magnet (3) is embedded in the recess (9), which in the preferred embodiment is flush with the recess (9) via a ferromagnetic plate (14). It can also be seen that the connection to the articulator arm (8) is made via the connecting element (4) embedded here with its threaded hole (5) and its recesses (6), whereby the connecting element (4) in the embodiment shown forms a fixed unit with the split cast plate (1) by means of a press fit and/or adhesive. The description of possible recesses for the purely centric alignment of production-related deviations of the same articulators was omitted in Figure 2 as well as in Figure 3. It only remains to be noted that the magnetic flux (15) passes unhindered through the spacer layer (7), as indicated, so that a secure magnetic hold to the ferromagnetic retention element of the model base is ensured.

Figure 3 shows a schematic representation, also in section, of a variant of a splitcast plate, in which the magnet (3) is inserted into its

corresponding recess (10) is let in and the non-ferromagnetic plate (11) creates a hermetic seal on the split cast plate side of the split cast plate (1), for example by gluing. It is conceivable that any micro gap that may still be present can be additionally covered by appropriate surface treatment or plating. This embodiment naturally has the advantage that a connecting element (4) can be dispensed with, so that the articulator-specific threaded holes (5) or recesses (6) can be cut into the solid material with this plate shape. Of course, with this plate variant too, only one plate of this shape can be integrated into the articulator to compensate for differences in articulator construction.

Figure 4 shows a schematic detailed drawing of a split cast plate (1') for aligning articulators of different construction in terms of hinge axis and/or centricity.

Only the retention space (16) is suitable for retention of the connecting medium (17) because the edge (19) is designed negatively conical here. A retention nut (18) or another retention element provides support for the articulator arm (8). Of course, it is possible to reduce the clearance so that it is oriented mid-sagittally and suitable for accommodating the magnet cup system. It should be noted that in this variant, bolt elements on the articulator side were previously removed.

Figure 5 shows essentially a schematic view of the articulator side on the split cast plate (!').

The recess (16,20) is designed as a retention space (16) by the partial negative-conical border (19) which is preferably oriented sagittally here. The recess portion (20) serves to accommodate the magnet (pot) system (3,14). In the embodiment shown, in contrast to Figure 4, the edge (19) is only cut out negatively conically on the side in order to achieve an optimal travel path sagittally and is also interrupted in the middle of the sagittal course (21) so that bolt elements on the articulator side do not have to be removed.

Claims (13)

EXPECTATIONS 1. Splitcast plate for dental articulators, characterized in that that it (1) has a split cast relief (2), is made of non-ferromagnetic material, that it has at least one magnet (3) which is covered on the side of the split cast plate by a spacer layer (7) also made of non-ferromagnetic material, wherein on the side of the articulator at least one threaded hole (5) and/or at least one recess (6, 16) is suitable for fixing the split cast plate (1) to the articulator arm (8) via an articulator-side retention element. 2. Splitcast plate for dental articulators according to claim 1, characterized, that the magnet (3) on the splitcast plate side e.g. by appropriate processing of the split cast plate (1,1') is covered with a spacer layer made of non-ferromagnetic material. 3. Splitcast plate for dental articulators according to claim 1,2, characterized, that the magnet (3) consists of a magnet pot system. 4. Splitcast plate for dental articulators according to claims 1-3, characterized, that when the magnet is inserted on the articulator side (3) at least one connecting element (4) is used in the corresponding recess (9), which is suitable for receiving at least one threaded hole (5) and/or at least one recess (6). 5. Split cast plate for dental articulators according to at least one of claims 1-4, characterized in that that the magnet(s) (3) or magnet pot system(s) is/are covered by at least one non-ferromagnetic plate (11) preferably flush with the plane of the splitcast plate (1) when introduced into the corresponding recess(es) (10) on the splitcast plate side. 6. Splitcast plate for dental articulators according to at least one of claims 1-5, characterized in that that the split cast plate (1,1') is surface sealed or protected by a surface treatment such as hard anodizing, plating, inorganic coatings, or the like. 7. Splitcast plate for dental articulators according to at least one of claims 1-6, characterized in that that the connecting element (4) is inserted into the split cast plate (1) on the articulator plate side by means of an external thread. 8. Splitcast plate for dental articulators according to at least one of claims 1-7, characterized in that that the connecting element (4) is inserted and/or glued on the articulator plate side by means of a press fit. 9. Splitcast plate for dental articulators according to at least one of claims 1-8, characterized in that that the split cast plate (1,1') can be protected from contamination during the model installation phase preferably by a rubber-elastic ring (13) which is dimensioned in height accordingly as when using a master or mother plate. 10. Split cast plate for dental articulators according to at least one of claims 1-9, characterized in that that the split cast plate (1') has at least one recess (16) on the articulator side as a retention element, which ensures freedom of movement for centric or hinge axis-related alignment of different articulators. 11. Splitcast plate for dental articulators according to at least one of claims 1-10, characterized in that that for the alignment of articulators of different construction in terms of hinge axis and/or centricity, a recess (16) is used, which with its completely or partially negatively conical edge (19) serves to retain the split cast plate (1'), whereby the recess (16) is preferably aligned sagittally suitable for every type of articulator, the edge of which is additionally interrupted (21) for unhindered sagittal movement range. 12. Splitcast plate for dental articulators according to at least one of claims 1-11, characterized in that that the split cast plate preferably has only lateral retention components on the articulator side, so that it is able to ensure fixation to the retention element for all required positions via a connecting medium. 13. Splitcast plate for dental articulators according to at least one of claims 1-12, characterized in that that the articulator-side retention element is preferably made in one piece and can be fixed to the respective articulator arm by means of threads and/or recesses and is able to establish the connection with the split cast plate via a connecting medium due to its retention parts, whereby the retention element is shaped accordingly depending on the situation.