Mounting device for automated dental prosthesis processing

Abstract

The present invention relates to a mounting device suitable for temporary connection to an unfinished dental prosthesis body in vitro during dental prosthesis processing, wherein the mounting device comprises at least a lower base portion and an upper connecting portion, wherein the connecting portion is adapted to connect to a void volume of the dental prosthesis body, wherein at least the connecting portion comprises a porous material having at least a porosity content of greater than or equal to 15% by volume and less than or equal to 75% by volume and a thermal conductivity of greater than or equal to 0.05 W / mK and less than or equal to 0.75 W / mK at 800° C. Furthermore, the present invention relates to a process for automated dental prosthesis processing and a mounting device system.

Description

Technical Field

[0001] The present invention relates to a mounting device suitable for temporary connection to an unfinished dental prosthesis body in vitro during dental prosthesis processing, wherein the mounting device comprises at least a lower base portion and an upper connecting portion, wherein the upper connecting portion is suitable for connection to a void volume of the dental prosthesis body, wherein at least the upper connecting portion comprises a porous material having at least a porosity content greater than or equal to 15% by volume and less than or equal to 75% by volume and a thermal conductivity greater than or equal to 0.05 W / mK and less than or equal to 0.75 W / mK at 800° C. Furthermore, the present invention relates to a process for automated dental prosthesis processing and a mounting device system. Background Art

[0002] Due to the stringent quality requirements and functional expectations for dental prostheses, the current state of the art dictates that the entire production process is dominated by manual steps. Advantageously, manual machining can precisely process difficult geometries and challenging materials while providing in-process control, ensuring that the process steps meet the desired outcome. However, manual machining steps also have significant disadvantages, particularly the associated labor costs and inconsistent individual results. Therefore, to overcome these shortcomings, the dental industry has seen several attempts over the past few decades to increase automation in machining. Automated CNC-controlled milling or 3D-printed crown structures are among the tools that have been successfully implemented. To ensure the same or even higher quality standards during machining, not only must manual operations be replaced with mechanical machining steps, but the associated process conditions must also be adjusted to fully support and utilize the advantages of machining capabilities.

[0003] Several attempts to improve the accuracy of handling dental prostheses during machining can be found in the patent literature.

[0004] For example, US 2008 008 982A1 discloses a device for holding a dental prosthesis during preparation of the dental prosthesis, the device comprising: at least one base, the at least one base having an upper surface; at least one pin, the at least one pin comprising a first end and a second end, the at least one pin further comprising an outwardly flared portion at the first end, the first end extending beyond the upper surface of the at least one base, and the second end extending through and into the upper surface of the base.

[0005] Another patent document US 2012 058 448A1 teaches a prosthesis mounting device that can be mounted on a miniature dental implant device for mounting a dental prosthesis, wherein the prosthesis mounting device includes a shell, the shell including a peripheral wall having a top cover at one end and a circular base with an opening at the other end, the continuous peripheral wall defining an axial cavity having a top at the top cover and an opening at the circular base; when the axial cavity is mounted on the miniature dental implant device, the circular base is supported on the platform of the shaft collar portion of the miniature dental implant device, and the circular base extends circumferentially beyond the shaft collar portion for a short distance to form an overhang.

[0006] In addition, US 2006 090 361A1 describes a method for generating three-dimensional shape data of a part other than an engaging part by a three-dimensional measuring device, wherein the engaging part has an engaging portion with a cross-sectional shape other than a rotating body and protrudes and / or is recessed on one side of the jaw, and the object mounting tool includes a cylindrical part, a mounting part and a placement part, the mounting part positions the extension line of the axis of the cylindrical part in the engaging part, the placement part aligns the pre-specified direction of the mounting part with the specified provided direction of the placement table, the center axis of the cylindrical part is first aligned with the Z axis, and the model of the dental prosthesis rotates around the Z axis based on the specified provided direction of the placement table.

[0007] However, in addition to existing solutions in the field of dental prosthesis processing, there is still a need for further solutions for better and more efficient handling of esthetic dental prostheses during processing. Summary of the Invention

[0008] It is therefore an object of the present invention to at least partially overcome the disadvantages of the prior art.In particular, it is an object of the present invention to provide an improved reproducible manufacturing process for prosthetic treatment, in particular to produce a uniformly coated dental prosthetic surface.

[0009] The above-mentioned object is achieved by including an installation device. In addition, the object is also achieved by a process and an installation device system respectively. Preferred embodiments of the present invention are also defined by the features disclosed in the description and the drawings, wherein, unless expressly excluded, the features of the separate parts are collectively included within the scope of the present invention.

[0010] The scope of the present invention is to disclose a mounting device suitable for being temporarily connected in vitro to an unfinished dental prosthesis body during the processing of the dental prosthesis, wherein the mounting device comprises at least a lower base portion and an upper connecting portion, wherein the connecting portion is suitable for connecting to the void volume of the dental prosthesis body, wherein at least the connecting portion comprises a porous material, the porous material comprising at least a porous content greater than or equal to 15% by volume and less than or equal to 75% by volume and a thermal conductivity greater than or equal to 0.05 W / mK and less than or equal to 0.75 W / mK at 800°C.

[0011] Surprisingly, it has been discovered that the mounting device defined above can improve the handling and processability of dental prostheses during manufacturing. These benefits are particularly evident in processing steps where further coatings or glazing are applied manually or automatically to the prosthesis body, and the resulting coated body undergoes further heating or firing. Without being bound by theory, it is hypothesized that the exceptional porosity of the mounting device, combined with the defined thermal properties, leads to improved coating results, with any "excess" applied coating material being absorbed within the pores of the mounting device. Consequently, excess material does not accumulate at the lower edge of the dental prosthesis and solidify during further processing, resulting in material non-conformance requiring manual correction. Instead, excess coating material is actively removed from the device by capillary forces, enabling a uniform prosthesis coating thickness while using more material for safety reasons. Furthermore, due to the thermal properties, a synergistic effect can be achieved, as the prosthesis does not need to be separated from the device while the additional coating is fixed to the prosthesis surface through successive firing steps. Due to the thermal properties required by the present invention, the mounting device's dimensions remain unchanged even at high temperatures, resulting in a secure and mechanically stable connection between the mounting device and the prosthesis during the coating and heat treatment steps. The fixed geometry between the prosthesis and the mounting device ensures reproducible coating and firing results, while also achieving a uniform temperature profile for the prosthesis. Consequently, the prosthesis can be manufactured manually or by machine control, with further coating steps, including the application of a glaze, resulting in a more uniform coating and firing result compared to existing solutions.

[0012] The mounting device is suitable for being temporarily connected to an unfinished dental prosthesis body in vitro during the processing of the dental prosthesis. The disclosed mounting device is only suitable for in vitro use. Therefore, the mounting device is not suitable for insertion into the patient's mouth. Typically, mounting devices are used to hold or fix dental prostheses during the prosthesis production process to improve handling performance and protect the prosthesis itself from direct physical contact. In a sense, the prosthesis body is unfinished and additional processing steps are required to obtain a finished prosthesis that can be used in vivo. Additional processing steps may include further surface coating, polishing steps, glazing steps, coloring steps, etc. The device is particularly suitable for unfinished prostheses, where further processing includes a coating and heat treatment steps. In such a processing sequence, the mounting device includes coordinated operations and processing effects.

[0013] The mounting device comprises at least a lower base portion and an upper connecting portion. The mounting device comprises at least two functional parts, wherein the upper portion of the mounting device is shaped or designed to connect or cooperate with the prosthesis body. Therefore, the connecting portion comprises a special profile to enable a "correct" mechanical interaction with the prosthesis. The lower base portion is in physical contact with the connecting portion and is designed to enable proper operation of the entire device, for example by providing a flat base. In addition, the lower base portion may provide further features to better operate the prosthesis connected to the device. Possible features may be handles or grips for connecting other components, holes or connecting components. The upper and lower parts may be formed from different materials and then connected, or they may be manufactured from a single piece of material. Preferably, the two parts only differ in their use and contain the same material composition or consist of the same material.

[0014] The connecting portion is adapted to connect to the void volume of the dental prosthesis body. The upper connecting portion is formed separately in order to securely connect and hold the prosthesis during the processing steps. Thus, the upper connecting portion can mimic the inner contour of the interior of the prosthesis and provide a tight fit between the mounting device and the prosthesis. Furthermore, the connecting portion can be formed so that a single connecting portion type can connect multiple prostheses of different shapes, for example, by connecting certain inner contour portions that are common to all prostheses. For example, the shape of the connecting portion is suitable for situations where, after the prosthesis is installed, the prosthesis cannot be separated from the connecting portion by gravity alone. The void volume of the prosthesis is formed from the inner surface of the prosthesis down to the lowest part of the prosthesis.

[0015] The connecting part comprises a porous material comprising at least a porous content of greater than or equal to 15% by volume and less than or equal to 75% by volume. For reproducible and sufficient absorption of the coating liquid, the porosity range in the above-mentioned material has been found to be advantageous. A lower porosity content may be disadvantageous because the possible absorption volume of the pores is insufficient, resulting in uneven coating thickness, particularly at the lower edge of the prosthesis. A higher porosity content may further be disadvantageous because the mechanical stability of the mounting device may be too low. The porous content may further preferably be greater than or equal to 25% by volume and less than or equal to 70% by volume, further preferably greater than or equal to 30% by volume and less than or equal to 60% by volume. The pore volume of the mounting device material can be assessed, for example, by mercury porosimetry as described in DIN ISO 15901-1:2016.

[0016] The connecting portion has a thermal conductivity greater than or equal to 0.05 W / mK and less than or equal to 0.75 W / mK at 800°C. The thermal conductivity of a material is a measure of its ability to conduct heat. The thermal conductivity range given above has been found to be advantageous for the mounting device. The dimensions of the entire device remain unchanged, and even at high temperatures, particularly during the firing step, this range ensures a uniform temperature distribution within the prosthesis without interference from the mounting device itself. Consequently, due to the low energy transfer to the device, the firing step, in particular, can proceed uniformly, resulting in a well-defined temperature within the prosthesis. Higher thermal conductivities may be disadvantageous, as the firing temperature of the prosthesis may be non-uniform. For example, the thermal conductivity of the device material can be evaluated according to DIN EN 993-15:2005.

[0017] Furthermore, in a preferred embodiment, the mounting device comprises a porous material, wherein the porous material comprises SiO2 and Al2O3, wherein the SiO2 content is greater than or equal to 10 wt.% and less than or equal to 50 wt.%, and the Al2O3 content is greater than or equal to 10 wt.% and less than or equal to 90 wt.%, and wherein the sum of the SiO2 content and the Al2O3 content is greater than or equal to 50 wt.%. This material composition has been found to be very useful for mechanically and thermally stabilizing the prosthesis during processing and, due to its liquid absorption properties, is also well-suited for interaction with most coating materials used to modify the surface of dental prostheses. Therefore, this material is well-suited for ensuring uniform coating, even on the lower prosthesis portions that come into contact with the mounting device. It is believed that the combination of Si and Al within the aforementioned ranges provides the "right" hydrophobicity / hydrophilicity to allow for absorption of excess coating components even in difficult geometries, such as those with large gaps between the support portion of the device and the prosthesis.

[0018] In a preferred aspect of the mounting device, the porous material can have a loss on ignition of greater than or equal to 0% by weight and less than or equal to 8% by weight. To achieve a reproducible firing process after applying the coating to the prosthesis surface, it has been found desirable for the porous material to have a relatively low loss on ignition. This range ensures that the physical contact between the prosthesis and the device remains constant, even under very demanding firing conditions. Heating generates little or no additional pressure in the void volume between the device and the inner surface of the prosthesis, resulting in a stable connection of the prosthesis during the firing process.

[0019] In another preferred aspect of the installation device, the density of the porous material may be greater than or equal to 250 kg / m 3 And less than or equal to 1300kg / m 3In order to better handle the device and improve mechanical and thermal stability, it has been found useful to use materials within the above density range. Lower densities may increase the risk of uneven firing or mechanical damage to the device material, and higher densities may unnecessarily increase the weight of the device. A further preferred density may be greater than or equal to 250 kg / m 3 And less than or equal to 800kg / m 3 , and can be greater than or equal to 300kg / m 3 And less than or equal to 700kg / m 3 .

[0020] In another preferred feature of the mounting device, the connection portion and the base portion can comprise the same porous material. To achieve a uniform and reproducible firing process, in which the prosthesis remains attached to the device during firing, it has been found advantageous if both device parts comprise, at least to a certain extent, the same porous material composition. This arrangement can provide uniform thermal device properties during the heat treatment process, particularly a constant heat capacity. This results in better prosthesis firing results. Preferably, the different parts can comprise more than 50% by weight, preferably more than 75% by weight, and preferably more than 90% by weight, of the same porous material.

[0021] In a preferred aspect of the mounting device, the lower base portion may include an orientation marking. In order to enable automated processing, it has been found useful that the lower base portion includes an asymmetrical shape or that the lower base portion includes a marking, wherein the marking is capable of providing information about the alignment of the prosthesis on the device. The alignment information may, for example, include information about the orientation of the back or front or left or right side of the prosthesis and the identity of the prosthesis. For example, the marking may be a color or a barcode or an RFID device. Additionally or alternatively, the device body itself may include the marking, for example by changing the shape of the device body. The accompanying drawings include a device in which the shape of the device body is asymmetrical.

[0022] In another preferred embodiment of the mounting device, the connecting portion and the base portion can consist of the same porous material. To achieve a very uniform firing step, it has been found useful if the various device components are made of the same material. This embodiment provides very reliable and reproducible firing results for uniformly coated prostheses.

[0023] In a preferred embodiment of the mounting device, the connecting portion and the base portion may include at least one interconnecting channel extending from the bottom to the top of the mounting device. Both device portions may include a channel structure extending from the bottom to the top of the device. The channel may be sized to allow gas to pass from the bottom to the top of the device. The interconnecting channel may allow gas to pass from the sealed internal space between the inner surface of the prosthesis and the connecting portion to the outside. This prevents pressure buildup during the firing process, thereby maintaining the mechanical connection between the device and the prosthesis during firing.

[0024] In another preferred feature of the mounting device, the circumferential outer edge of the support portion may include an angle relative to a plane of greater than or equal to -30° and less than or equal to 35°. This angle range has been found to be highly suitable for ensuring rapid and effective reduction of excess coating material applied to the prosthetic surface. The angled design of the outer edge provides for closer contact between the device and the prosthetic surface, allowing for easy absorption of even very viscous coating liquids.

[0025] In a preferred feature of the mounting device, the mounting device is adapted to be temporarily connected to an unfinished dental prosthesis body in vitro during dental prosthesis processing, wherein the mounting device comprises at least a lower base portion and an upper connecting portion, wherein the connecting portion is adapted to be connected to the void volume of the dental prosthesis body, wherein at least the connecting portion comprises a porous material, the porous material comprising at least a porous material greater than or equal to 250 kg / m 3 And less than or equal to 1300kg / m 3 and a thermal conductivity greater than or equal to 0.05 W / mK and less than or equal to 0.75 W / mK at 800°C.

[0026] Also within the scope of the present invention is a mounting device system comprising the mounting device of the present invention and a prosthesis. The connecting portion of the mounting device may include an inner connecting portion and an outer supporting portion, wherein the inner connecting portion is adapted to extend into the void volume of the dental prosthesis, and the outer supporting portion is adapted to conform to the lower circumferential contour of the dental prosthesis body, wherein the difference in length between the lower circumferential contour of the dental prosthesis body and the outer supporting portion of the connecting portion is less than or equal to 10% of the length of the lower circumferential contour of the dental prosthesis body. It has been found advantageous if the upper connecting portion comprises at least two distinct functional parts. On the one hand, there is a portion that ensures proper attachment of the prosthesis by inserting and securing the connecting portion within the inner void volume of the prosthesis. On the other hand, there is a portion that is not intended to be inserted into the void volume of the prosthesis but supports the lower prosthesis portion. The prosthesis rests on the latter portion and is in close contact with the surface of the latter portion. Thus, mechanical fixation is provided by the connecting portion, while support for the lower circumferential prosthesis portion is provided by the supporting portion. For example, the supporting portion may extend from the connecting portion to the outer surface of the prosthesis. Furthermore, the supporting portion may extend beyond the prosthesis surface. In other words, the supporting portion may be larger than the wall thickness of the prosthesis. In order to ensure proper absorption of any coating material applied to the surface of the prosthesis, the support part should be in close contact with the lower contour of the prosthesis. Close contact can be ensured if the lower contour of the dental prosthesis body and the outer support part of the connecting part have similar dimensions, i.e. within the length range mentioned above. Furthermore, it is advantageous that the contour of the support part closely matches the lower contour of the prosthesis body and is in direct physical contact. In this case, additional or inadvertently applied liquid can be directed to the porous device body without accumulating on the lower prosthesis part. Due to the defined porosity of the mounting device, it is not necessary for every part of the prosthesis body to be in direct physical contact with the mounting device. It was found that liquid can also be safely absorbed by the mounting device in the presence of small gaps between the prosthesis and the mounting device.

[0027] In a preferred embodiment of the system, the profile of the surface of the connecting portion of the mounting device can at least partially contact the inner surface of the dental prosthesis body, wherein after the mounting device is connected to the dental prosthesis body, the void volume between the surface of the inner connecting portion and the inner surface of the dental prosthesis body is less than or equal to 10 volume% relative to the void volume of the dental prosthesis body. In order to ensure that the connecting portion has sufficient mechanical stability and fit to the prosthesis, it is beneficial that the profile of the surface of the connecting portion should match the inner surface of the prosthesis body. If only a small void volume remains after the connecting portion is inserted, the physical control of the prosthesis and the movement between the prosthesis and the connecting portion are limited during the high temperature firing process. A larger void volume may be disadvantageous because the mechanical connection force and / or the uniform thermal performance of the prosthesis and device system may be reduced. The remaining void volume can be mathematically calculated based on the geometry of the device and the shape of the inner surface of the prosthesis.

[0028] The present invention further discloses a process for the automated processing of dental prostheses, wherein the dental prosthesis comes into contact at least temporarily with the mounting device according to the invention in a process step during processing. In principle, the device according to the invention makes it possible to improve the quality of manually or automatically processed prostheses, since in each case the amount of substandard coating material is reduced. However, the device according to the invention can be used in particular in the context of automated coating processes, for example, in which the coating is applied via a spray robot. In this case, the speed of the entire process and the amount of coating applied can be increased, and an accumulation of coating material on the lower prosthesis parts can be avoided. As a result, the process is very robust and its processing costs can be lower than those of state-of-the-art processes. Further process advantages are also mentioned in the context of the device according to the invention.

[0029] In a preferred embodiment of the process, the process can be a coating process. As mentioned above, the disclosed apparatus is particularly useful in coating processes where additional liquid material is applied to the surface of the prosthesis. In this case, uneven coating results can be avoided by absorbing the excess material.

[0030] In another preferred aspect of the process, the process can be a glazing process. The apparatus of the present invention offers further advantages when the coating process is a glazing process. Uneven glazing is difficult to correct after the firing step. Furthermore, due to the optical properties of the glaze composition, uneven glazing is difficult to detect. Therefore, the process and apparatus of the present invention also offer further advantages for very transparent coating compositions.

[0031] In another preferred embodiment of the process, the dental prosthesis can be a prosthesis selected from the group consisting of a crown, a bridge, a multi-unit bridge, or a combination thereof. The disclosed process is particularly suitable for coating difficult geometries. According to the current state of the art, either very low amounts of coating liquid are used to avoid any excess buildup, or a larger safety amount is applied, leading to the aforementioned prosthesis defects after firing. For such geometries, both of these options are avoided by the described process and apparatus, resulting in reproducible and sufficient coatings even for very difficult geometries. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described with reference to the following figures, but is not intended to be limited by these figures.

[0033] Figure 1 A schematic diagram showing the different parts of the mounting arrangement of the invention is shown.

[0034] Figure 2 A representation of the mounting arrangement of the present invention is shown.

[0035] Figure 3The combination of a prosthesis and a mounting device according to the invention is shown. DETAILED DESCRIPTION

[0036] exist Figure 1 A possible embodiment of the mounting device (1) of the present invention is described in the following. The mounting device (1) comprises at least a lower base part (2) and an upper connecting part (3). The upper connecting part (3) may also comprise different structures, such as an inner connecting part (4) and an outer supporting part (5). Therefore, the inner connecting part (4) and the outer supporting part (5) can be regarded as parts of the upper connecting part (3), since these structures also participate in the connection of the dental prosthesis body (6) to the mounting device (1). As a result, a two-part arrangement is achieved, comprising a device for supporting the mounting device (1), i.e. the lower base part (2), and a device for connecting the dental prosthesis body (6) (not shown), i.e. the upper connecting part (3) with the inner connecting part (4) and the outer supporting part (5). The entire mounting device (1) may comprise the same material or consist of the same material. The mounting device (1) may also comprise an orientation mark (8), wherein the mark is capable of indicating or distinguishing the direction of the dental prosthesis body (6) on the mounting device (1) or the orientation of the mounting device (1).

[0037] Figure 2 The mounting device (1) of the present invention is shown, wherein the mounting device (1) further comprises a lower base portion (2) and an upper connecting portion (3), wherein the upper connecting portion (3) further comprises an inner connecting portion (4) and an outer supporting portion (5). In addition, the outer circumferential edge (9) of the supporting portion is shown. The inner connecting portion (4) is shaped so that it can be inserted into the void volume (not shown) inside the dental prosthesis body (6). The void volume of the dental prosthesis body (6) is filled by the inner connecting portion (4) after the dental prosthesis body (6) is connected to the mounting device (1). The dental prosthesis body (6) is at least partially resting on the outer supporting portion (5). In this embodiment, there are no positioning marks (8) on the mounting device (1).

[0038] Figure 3The mounting device (1) of the present invention is shown after a dental prosthesis body (6) has been connected to the mounting device (1). The dental prosthesis body (6) in this case is a crown. It can be seen that the dental prosthesis body (6) is connected to the mounting device (1) via the upper connecting part (3), wherein the internal void volume of the crown is at least partially filled by the inner connecting part (4). The lower circumferential contour line (7) of the dental prosthesis body is at least partially resting on the outer supporting part (5) of the upper connecting part (3). Additional coating material can be directed to the upper connecting part (3), thereby avoiding the accumulation of coating material at the lower circumferential contour line (7) of the dental prosthesis body. An automatic coating program can be used. In addition, excess material can be deliberately applied in order to ensure a sufficient amount of coating liquid, without the need for manual removal of excess material after the firing step.

[0039] Reference Signs List

[0040] 1. Install the device;

[0041] 2 lower base portion;

[0042] 3. Upper connecting part;

[0043] 4. Internal connection part;

[0044] 5. External support part;

[0045] 6. Dental prosthesis body;

[0046] 7. The lower circumferential outline of the dental prosthesis body;

[0047] 8 directional markers;

[0048] 9 Support the outer edge of the circumference of the part.

Claims

1. A mounting device (1), which is suitable for being temporarily connected to an unfinished dental prosthesis body (6) in vitro during the dental prosthesis processing. It is characterized by The mounting device (1) comprises at least a lower base portion (2) and an upper connecting portion (3, 4, 5), wherein the upper connecting portion (3, 4, 5) is adapted to be connected to the void volume of the dental prosthesis body (6), wherein at least the upper connecting portion (3, 4, 5) comprises a porous material, the porous material comprising at least a porous content greater than or equal to 15% by volume and less than or equal to 75% by volume, and a thermal conductivity greater than or equal to 0.05 W / mK and less than or equal to 0.75 W / mK at 800°C.

2. The mounting device according to claim 1, wherein the porous material comprises SiO2 and Al2O3, wherein the SiO2 content is greater than or equal to 10 wt% and less than or equal to 50 wt%, and the Al2O3 content is greater than or equal to 10 wt% and less than or equal to 90 wt%, wherein the sum of the SiO2 content and the Al2O3 content is greater than or equal to 50 wt%.

3. The mounting device according to claim 1, wherein the ignition loss of the porous material is greater than or equal to 0 wt% and less than or equal to 8 wt%, and wherein the density of the porous material is greater than or equal to 250 kg / m 3 And less than or equal to 1300kg / m 3 .

4. The mounting device according to claim 1, wherein the upper connecting part (3, 4, 5) and the lower base part (2) comprise the same porous material, and wherein the lower base part (2) comprises positioning marks (8).

5. The mounting device according to claim 1, wherein the upper connecting part (3, 4, 5) and the lower base part (2) consist of the same porous material.

6. The mounting device according to claim 1, wherein the upper connecting portion (3, 4, 5) and the lower base portion (2) comprise at least one interconnecting channel from the bottom to the top of the mounting device (1).

7. The mounting device according to claim 1, wherein the circumferential outer edge (9) of the outer support portion (5) of the upper connecting portion (3, 4, 5) comprises an angle greater than or equal to -30° and less than or equal to 35° relative to a plane.

8. A mounting device system comprising a mounting device and a prosthesis according to claim 1, wherein the upper connecting part (3, 4, 5) comprises an inner connecting part (4) and an outer supporting part (5), wherein the inner connecting part (4) is adapted to extend into the void volume of the dental prosthesis body (6), and the outer supporting part (5) is adapted to match the lower circumferential contour line (7) of the dental prosthesis body (6), wherein the length difference between the lower circumferential contour line (7) of the dental prosthesis body (6) and the outer supporting part (5) of the upper connecting part (3, 4, 5) is less than or equal to 10% relative to the length of the lower circumferential contour line (7) of the dental prosthesis body.

9. A mounting device system according to claim 8, wherein the profile of the surface of the inner connecting part (4) is intended to at least partially contact the inner surface of the dental prosthesis body (6), wherein after the mounting device (1) is connected to the dental prosthesis body (6), the void volume between the surface of the inner connecting part (4) and the inner surface of the dental prosthesis body (6) is less than or equal to 10 volume % relative to the void volume of the dental prosthesis body (6).

10. A process for the automated production of dental prostheses, wherein a dental prosthesis body (6) is at least temporarily brought into contact with a mounting device (1) according to any one of claims 1 to 7 during a coating process.

11. The process according to claim 10, wherein the coating process is a glazing process and wherein the dental prosthetic body is a prosthetic body selected from the group consisting of a crown, a bridge, or a combination thereof.

12. The process of claim 11, wherein the dental bridge is a multi-unit dental bridge.

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