Methods for manufacturing dental prosthetic components, adapters, blanks, sets of adapters and blanks, and sets of multiple adapters

Abstract

A method for manufacturing a dental prosthesis part (200), particularly a fixed dental prosthesis part (200), connectable to an abutment tooth (110), in which an adapter (10) for a machine tool and a blank (50) for the dental prosthesis part (200) are manufactured.

Description

[Technical Field]

[0001] The present invention relates to a method for manufacturing a dental prosthetic part connectable to an abutment tooth, an adapter for a machine tool, a blank for a dental prosthetic part, a set consisting of an adapter and a blank, and a set consisting of a plurality of adapters. [Background technology]

[0002] Dental prosthetic components are used to replace damaged or missing teeth or tooth parts. Dental prosthetic components can be categorized as fixed and removable dental prosthetic components. Removable dental prosthetic components include dentures. Fixed dental prosthetic components include crowns, partial crowns, bridges, and veneers.

[0003] Crowns and bridges are typically connected to existing teeth in the mouth. To this end, dentists prepare abutments by grinding down existing teeth. The shape and dimensions of each abutment tooth vary depending on the shape, size, and inclination of the teeth, as well as manual processing. An impression of the abutment tooth is then taken using a traditional or digital impression technique. Based on this impression, a suitable dental prosthesis component can be fabricated, which is then attached to the abutment tooth and fixed in place. The dental prosthesis component is manufactured in several steps. First, the rough shape of the dental prosthesis component is milled from a blank and then cast or laser sintered. This is followed by grinding and polishing. Finally, the dental prosthesis component is coated.

[0004] Manual manufacturing of dental prosthesis components is very time consuming, however, as each dental prosthesis component must be manufactured individually, it is difficult to automate the manufacturing process.

[0005] Known methods for manufacturing dental prosthetic parts are described in US Pat. Nos. 5,629,299, 5,729,310, 5,729,410, 5,729,429 and 5,829,510. None of the processes described therein are fully automated. In all cases, manual reworking is required. US Pat. No. 5,629,299 only discloses a method for automatically and individually adapting the color, translucency, brightness and fluorescence of dental restorations. Besides this, other methods are known from US Pat. No. 5,629,299, ... and US Pat. No. 5,629,299. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] International Publication No. 98 / 03128 [Patent Document 2] U.S. Patent No. 7,077,391 [Patent Document 3] International Publication No. 2009 / 070470 [Patent Document 4] International Publication No. 2008 / 131159 [Patent Document 5] DE 19922870 [Patent Document 6] German Patent Application Publication No. 102010037160 [Patent Document 7] German Patent Application Publication No. 102016203055 [Patent Document 8] European Patent No. 1729667 [Patent Document 9] International Publication No. 2009 / 073498 Summary of the Invention [Problem to be solved by the invention]

[0007] SUMMARY OF THE INVENTION It is therefore an object of the present invention to increase the degree of automation in the manufacturing process of dental prosthetic components. [Means for solving the problem]

[0008] This object is achieved by the method according to claim 1.

[0009] The method is a method for manufacturing a dental prosthesis part, in particular a fixed dental prosthesis part, that can be connected to an abutment, comprising the steps of: a) providing an abutment data set comprising 3D data relating to the shape and dimensions of the abutment tooth; b) using the abutment data set to manufacture an adapter for a machine tool, the adapter having an abutment part that corresponds in particular to the shape and dimensions of the abutment tooth and a coupling part that can be coupled to a clamping device of the machine tool, and c) manufacturing a blank using the abutment data set, the blank having a recess capable of at least partially accommodating the abutment tooth; and d) connecting the blank to the adapter, in particular such that the abutment of the adapter is at least partially received in the recess of the blank; and e) clamping the connection portion in the clamping device of the machine tool; f) additively and / or subtractively reworking the blank into the dental prosthesis component using the machine tool; g) removing the dental prosthesis component from the adapter.

[0010] This method has the advantage that the blank can be clamped in the machine tool using an adapter, whereby the blank is positioned on the adapter and the adapter's shape is known, so the position and orientation of the blank in the machine tool are known. In this way, the blank can be machined very precisely. Accurate machining is possible even if the adapter with the blank attached is unclamped and then re-clamped. This is because the position and orientation of the blank are still predetermined in the machine tool due to the adapter's shape and its known placement in the machine tool. Furthermore, the blank can be clamped sequentially in several different machine tools, so that the position and orientation of the blank are clearly known in each case. This allows the blank to be machined multiple times. This avoids or at least significantly reduces manual remachining of machined blanks, increasing the degree of automation. Due to the temporary connection with the adapter, the dental prosthesis component requires little or no remachining after removal from the adapter.

[0011] In the case of a bridge, the dental prosthesis component is connected to multiple abutments. In this case, the abutment data set includes 3D data on the shape and dimensions of all the abutments and their relative positioning. The adapter may then be provided with multiple abutments, or multiple adapters may be provided. The blank may then be provided with multiple recesses that match the shape, dimensions, and relative positioning of the multiple abutments.

[0012] The steps of the method can be performed in a given order, but do not necessarily have to be performed in that order. In particular, steps b) and c) can be performed simultaneously or sequentially, in any order. Steps d) and e) can also be performed in any order. Step a) is preferably performed before steps b) and c). Also, steps d) to g) are preferably performed after steps b) and c). It is even more preferred that step f) is performed after steps d) and e). It is even more preferred that step g) is performed after step f). Instead of a single clamping and subsequent remachining (steps e) and f), the connection can also be clamped and unclamped multiple times (on the same or different machine tools), so that it is remachined in the clamped state in an additive and / or subtractive manner. This can be repeated as many times as necessary without affecting the accuracy of the remachining.

[0013] In particular, an abutment is a body made from a (human) tooth, in particular having a frusto-conical shape, on and / or against which a dental prosthetic component can be permanently placed, in particular the abutment is placed in the oral cavity of the person to be treated.

[0014] The blank is considered to be a preliminary stage of a dental prosthesis part. Therefore, the blank is a semi-finished product. The blank may have a shape that roughly corresponds to the shape of the dental prosthesis part to be manufactured, but may also be, for example, block-shaped. In either case, a recess for an abutment tooth or an abutment part of an adapter is formed in the blank. In particular, since the blank is temporarily connected to the clamping device via the adapter, the blank does not have a connecting part for connecting the blank to the clamping device of the machine tool.

[0015] The recess is preferably made larger than the abutment so that, for example, an adhesive can be placed between the components to bond them together. However, at the preparation boundary, i.e., at the transition between the abutment and the connection portion, the recess can be dimensioned so that the blank contacts the abutment. This ensures clear positioning of the blank relative to the adapter. If a dental prosthetic component is subsequently used, it will be located at the preparation margin of the abutment tooth. Alternatively, the abutment can have a different shape than the (actual) abutment tooth at the preparation margin, so that the blank and the adapter do not contact there. This prevents damage to the blank at this point and makes it easier to process the blank around this point.

[0016] Within the scope of the method according to the invention, it is also possible for the blank to have two (or more) recesses and for two (or more) different adapters to be provided, the abutment parts of the adapters and the recesses of the blank being adapted to two (or more) different abutments, in this way it is possible, for example, to produce large bridges to be attached to two (or more) widely spaced abutments.

[0017] The clamping device of the machine tool, also known as a receptacle / chuck, is a zero-point clamping system. This allows the position and orientation of the blank to be determined with particularly high precision, which is beneficial when reprocessing the blank into a dental prosthetic component.

[0018] The machine tool is in particular a CNC machine tool, preferably a CNC machine tool for additive and / or subtractive machining of workpieces, for example a CNC milling machine.

[0019] In addition to the abutment data set, other data sets can be used in the method, such as a tooth data set, which in particular contains 3D data on the shape and dimensions of the dental prosthesis part, in particular on its outer surfaces (including the occlusal, labial, lingual, buccal and lingual surfaces). The tooth data set is advantageously used during the production of the blank in step c) and / or during the re-machining of the blank in step f). In step c), by combining the abutment data set and the tooth data set, a complete 3D model of the blank can be created, on the basis of which the blank can be manufactured. In step f), for example, a block-shaped blank can be converted into a dental prosthesis part using the tooth data set.

[0020] Advantageously, the adapter of step b) and / or the blank of step c) are manufactured by casting and / or a subtractive process, in particular including milling, grinding and / or turning, and / or an additive process, in particular laser sintering. Preferably, both the adapter and the blank are one piece. During casting, for example, a mold for the part to be manufactured can first be milled from a block of wax. The mold is then embedded, the wax is burned off, and liquid metal is poured into the hollow mold.

[0021] The adapter and / or blank advantageously comprises a ceramic, particularly zirconium dioxide and / or lithium disilicate, a metal and / or a metal alloy. Adapters and / or blanks made from a single material are particularly stable. Zirconium dioxide is a particularly stable material and is particularly suitable for larger dental prosthetic components, such as bridges.

[0022] The materials used for the blank and the adapter are expensive. In some embodiments, therefore, in step b), a multi-part adapter is manufactured. Preferably, one part of the multi-part adapter has an abutment portion, and another part of the multi-part adapter has a connecting portion. These parts can be temporarily joined, for example, using an adhesive. In this way, a part with a connecting portion can be used successively for different adapters, thereby achieving cost reduction. Therefore, step b) can also include using an existing part with a connecting portion and further manufacturing a part with an abutment portion and connecting it to another part to manufacture the adapter.

[0023] Steps b) and c) may include sintering the adapter or blank, respectively. In this case, a green compact is first produced, such as by casting and / or milling, and then the green compact is sintered to produce the adapter or blank. The green compact is initially produced oversized, as it shrinks during sintering. After sintering, the adapter or blank can be further processed, particularly by subtractive and / or additive processing, to obtain the desired final shape.

[0024] In an advantageous embodiment, in step a), the abutment data set is provided by recording the shape and dimensions of the abutment teeth and preferably the relative arrangement of the abutment teeth. Alternatively, an existing abutment data set can also be provided in step a). The shape and dimensions of the abutment teeth and optionally the relative arrangement of the abutment teeth are preferably recorded directly in the patient's mouth (intraoral scan) or by scanning a model (model scan), in particular a plaster model. An intraoral scanner can be used for this purpose.

[0025] For reprocessing the blank, it is advantageous for the blank and the adapter to be firmly connected to each other. Otherwise, there is a risk that the blank will come off or be damaged during processing. In an advantageous embodiment, the blank is removably and adhesively connected to the adapter in step d), in particular by glue and / or cement. The adhesive connection ensures a strong bond. Since the connection is removably connected, the dental prosthesis part and the adapter can be separated almost non-destructively after reprocessing. Removal can be achieved, for example, by dissolving the adhesive.

[0026] The shape and dimensions of the recess in step c) are preferably designed in such a way that an intermediate space remains between the recess and the abutment part during the connection in step d), whereby the intermediate space is filled with a connection material, in particular an adhesive and / or cement, creating a defined space in which the connection material can be placed and in which the blank can be connected to the adapter, thereby achieving a secure connection.

[0027] As already mentioned, the removal of the dental prosthesis part from the adapter should be as non-destructive as possible. Therefore, in an advantageous embodiment, in step g), the dental prosthesis part is removed from the adapter by melting the adhesive connection, in particular in an oven. Preferably, the adapter with the attached dental prosthesis part is first removed from the machine tool, i.e., removed from the clamping device, and then the adapter and the dental prosthesis part are separated from each other.

[0028] In an advantageous embodiment, the additive reworking in step f) comprises applying a coating and / or the subtractive reworking in step f) comprises milling, grinding and / or polishing. Coating (veneering) is preferably the last work step. For coating as well as milling, grinding and polishing, it is advantageous to know the exact position and orientation of the blank in the machine tool, which is achieved by an adapter.

[0029] In advantageous embodiments, steps b), c), and d) are combined into one step. The adapter and blank are preferably manufactured as a single unit by casting and / or subtractive processes, particularly by milling, grinding, and / or turning, and / or additive processes, resulting in no abutment formed in the adapter. The combined adapter and blank are manufactured using the abutment data set. The blank already has a recess, at least partially capable of receiving the abutment tooth. The adapter blank has a coupling portion that can be clamped by a clamping device of a machine tool in step e). The blank is then converted into a dental prosthesis part. The adapter blank is preferably sintered before or after reworking. In these embodiments, the dental prosthesis part is preferably removed from the adapter by machining after the reworking is completed, particularly in the same machine tool.

[0030] The object of the invention is also achieved by an adapter for a machine tool, which is manufactured in particular by step b) of the method according to the above description and has an abutment part corresponding in shape and size to the abutment tooth and a connecting part that can be coupled to a clamping device of a machine tool. The abutment part in particular corresponds in shape and size to the respective abutment tooth.

[0031] The coupling portion of the adapter is particularly cylindrical with a groove running along its circumference and has particularly hemispherical ends. This shape is suitable for the clamping devices of many machine tools, allowing the adapter to be used with many different machine tools. In general, however, the coupling portion can be of any shape and size suitable for the clamping device of a particular machine tool. The advantages of this invention arise particularly when the adapter is used with one or more suitable machine tools.

[0032] Preferably, the connection is curved, i.e. not particularly straight, as this allows the individual tools of the machine tool better access to the relevant areas of the blank, simplifying the subsequent processing of the blank, including coating. However, particularly in the case of single crowns, a straight design of the connection is sufficient, in which case the connection itself is easier to manufacture.

[0033] A dental prosthetic component blank can be temporarily and removably attached to an abutment. This allows the blank to be clamped in a machine tool, where it is placed on an adapter, and the position and orientation of the blank in the machine tool are known because the shape of the adapter is known. In this way, the blank can be machined very precisely. Even when the adapter with the blank attached is unclamped and then re-clamped, precise machining is possible because the position and orientation of the blank in the machine tool are still predetermined by the shape of the adapter and its unique placement in the machine tool. Furthermore, the blank can be clamped sequentially in several different machine tools, whereby the position and orientation of the blank are clearly known in each case. This allows the blank to be machined multiple times. Manual remachining of milled blanks is thus avoided or at least significantly reduced.

[0034] The abutment and / or connector preferably form one end of the adaptor. Where the adaptor comprises only the abutment and connector, the adaptor is preferably elongate and has two ends.

[0035] Dental prosthetic components also include bridges. The bridge spans multiple adjacent teeth. The bridge is fixed to multiple abutment teeth. To enable the bridge to be manufactured precisely, the adapter preferably has multiple abutment parts, each with a shape and size corresponding to a different abutment tooth. The bridge blank can then be placed on the abutment parts. The relative positioning of each abutment tooth, as well as the shape and size of the individual abutment teeth, is determined using the abutment data set.

[0036] Preferably, the adapter is one piece. This makes the adapter very stable and holds the blank precisely in its intended position. This allows for precise reworking of the blank. Alternatively, the adapter can be made up of multiple pieces. Preferably, one adapter piece of a multi-piece adapter has the abutment portion and another adapter piece of the multi-piece adapter has the connecting portion. This allows an adapter piece with a connecting portion to be used with multiple different adapter pieces with abutment portions, thereby achieving cost savings in the manufacture of the adapters.

[0037] The adapter is advantageously made of ceramic, particularly zirconium dioxide and / or lithium disilicate, metal and / or metal alloy. The adapter is particularly stable when made of a single material. Zirconium dioxide is a particularly stable material and is particularly suitable for larger dental prosthetic components such as bridges.

[0038] The adapter may further be formed according to any advantageous embodiment described above.

[0039] The object of the invention is also achieved by a dental prosthesis blank, in particular produced according to step c) of the above-mentioned method, which comprises a recess capable of at least partially accommodating an abutment tooth, by means of which the blank can be temporarily and detachably attached, in particular to the above-mentioned adapter, and subsequently precisely remachined in a machine tool to form the dental prosthesis part.

[0040] The blank may further be formed according to the advantageous embodiments described above.

[0041] The object of the present invention is also achieved by a set consisting of at least one adapter as described above and at least one blank as described above, wherein the abutment portion of the at least one adapter and the recess of the at least one blank fit the same abutment tooth. This allows the blank to be temporarily and detachably attached to the abutment portion. In this way, the blank can be clamped in a machine tool, and its position and orientation within the machine tool are known. In this way, the blank can be machined very precisely. Furthermore, the blank can also be clamped in several different machine tools in turn, which allows multiple machining of the blank. In this way, manual remachining of the milled blank is avoided.

[0042] Two (or more) recesses can be provided in the blank, and two (or more) different adapters can be provided, so that the abutment portion of each adapter and the respective recess in the blank fit two (or more) different abutment teeth. In this way, for example, a large bridge can be made to fit two (or more) widely spaced abutment teeth.

[0043] The object of the invention is also achieved by a set of adapters according to the above description, in which the connection parts are identical for each adapter and the abutment parts of the adapters are different and are adapted to different abutment teeth in particular. Because the connection parts are identical, the adapters can all be used with the same clamping device of the machine tool. At the same time, the adapters are individually adapted to a given abutment tooth. In this way, dental prosthetic parts for different abutment teeth can be manufactured using the same machine tool.

[0044] The object of the invention is further achieved by a method for manufacturing a dental prosthesis part, in particular a fixed dental prosthesis part, connectable to an abutment, comprising the following steps:

[0045] This method is aa) providing an abutment data set comprising 3D data on the shape and dimensions of the abutment tooth; bb) manufacturing an adapter blank part comprising a blank and an adapter integrally connected to the blank, the blank having a recess capable of at least partially receiving an abutment tooth, the adapter having a coupling portion capable of being coupled to a clamping device of a machine tool, and cc) clamping the connection in a clamping device of the machine tool; dd) additive and / or subtractive remachining of the blank using a machine tool into a dental prosthetic component; and ee) removing the dental prosthesis component from the adapter.

[0046] This method also offers the advantages mentioned above, in particular the possibility of machining the blank precisely and of machining the blank on one or more machine tools, and even multiple times. This method can also be further developed according to the advantageous embodiments mentioned above.

[0047] The object of the invention is also achieved by the adapter blank part manufactured in step bb).

[0048] The adapter blank part is preferably sintered in particular after step bb) and / or before step cc), which leads to a shrinkage of the adapter blank part, which is already taken into account during the production in step bb).

[0049] The invention will now be described by way of example with reference to the drawings in which: [Brief explanation of the drawings]

[0050] [Figure 1] 1 is a schematic diagram of an abutment tooth in the oral cavity of a treatment subject. [Figure 2] FIG. 1 is a schematic diagram showing a set of an adapter and a blank in partial cross section. [Figure 3] 3 is a schematic diagram showing, in partial cross section, a state in which the adapter and the blank in FIG. 2 are connected. FIG. [Figure 4]2 is a schematic diagram showing, in partial cross section, a state in which a dental prosthetic component is attached to the abutment of FIG. 1. FIG. [Figure 5] 10 is a schematic diagram of another embodiment of a set of an adapter and a dental prosthesis part. FIG. [Figure 6] 10 is a schematic diagram of another embodiment of a set of an adapter and a dental prosthesis part. FIG. [Figure 7] 1 is a schematic diagram illustrating a processing sequence of an embodiment of the method according to the present invention; [Figure 8] 1A and 1B are schematic diagrams illustrating an embodiment of an adapter blank component. [Figure 9] FIG. 1 is a schematic diagram showing a set of an adapter and a blank in partial cross section. DETAILED DESCRIPTION OF THE INVENTION

[0051] 1 shows a schematic cross section of a patient's jaw 100. An abutment tooth 110, which has been prepared by a dentist by grinding an existing tooth, is placed in the jaw 100. The abutment tooth 110 has a generally frustoconical shape. In a lower region 112, the abutment tooth 110 is surrounded by gums 116. A crown (not shown) is provided in an upper region 114 of the abutment tooth 110.

[0052] The shape and dimensions of the abutment tooth 110 can be measured, for example, by an intraoral 3D scan, which results in an abutment data set having 3D data that provides information about the shape and dimensions of the abutment tooth 110.

[0053] The adapter 10 shown in Figure 2 can then be manufactured based on this data. The adapter 10 comprises an abutment part 20 whose shape and dimensions correspond to the abutment tooth 110 of Figure 1. The adapter 10 further comprises a connection part 30 designed to be coupled to a clamping device of a machine tool (not shown), in particular a quick clamping system. In the embodiment shown, the connection part 30 is designed to be coupled to a zero-point clamping system.

[0054] The abutment portion 20 and the connecting portion 30 are disposed on both ends of the adapter 10 and are connected to each other by a connecting portion 40 .

[0055] The linking portions 30 and the connecting portions 40 are also milled based on the 3D data. The linking portions 30 of the different adapters 10 are identical. The adapters 10 differ by their abutment portions 20 and, optionally, by their connecting portions 40.

[0056] The adapter 10 is manufactured from solid material by milling. For this purpose, the 3D data of the abutment data set is combined with the 3D data of the articulation part 30 and the connection part 40 to form a 3D model, which then serves as the basis for the manufacture of the adapter 10.

[0057] 2 further shows a blank 50. The blank 50 is also manufactured using the abutment data set and has a recess 52 and an outer surface 54. The recess 52 is designed based on the abutment data set in terms of size and shape to accommodate the abutment 20 or abutment tooth 110, whereby the recess 52 is larger than the abutment 20 so as to leave an intermediate space.

[0058] In the illustrated embodiment, the mold of the outer surface 54 was manufactured using a tooth data set, which includes 3D data of the desired shape and dimensions of the dental prosthetic component (not shown here). In other embodiments, the outer surface 54 of the blank 50 may be block-shaped.

[0059] Next, the adapter 10 and the blank 50 are joined together (FIG. 3). For this purpose, the abutment 20 is placed in the recess 52. The intermediate space is filled with a soluble adhesive 60. The adapter 10 and the blank 50 are detachably and adhesively joined to each other by the adhesive 60. In this state, the combination of the adapter 10 and the blank 50 can be placed in succession on one or more machine tools. There, the blank 50 is processed by additive and / or subtractive machining into a dental prosthetic part 200 (see FIG. 4), in this example a crown. Knowing the shape and dimensions of the adapter 10 and the blank 50, and the accurate positioning of the adapter 10 in the zero-point clamping system of the machine tool, allows the blank 50 to be machined very precisely.

[0060] Once the blank 50 has been reshaped into the dental prosthesis component 200, the dental prosthesis component 200 is removed from the adapter 10. In the case of a meltable adhesive 60, the composite of the adapter 10 and the dental prosthesis component 200 can be heated in an oven. After heating, the dental prosthesis component 200 can be separated from the adapter 10. The dental prosthesis component 200 can then be placed directly on the abutment tooth 110 and bonded to the abutment tooth 110 using, for example, cement 210 (FIG. 4).

[0061] 5 shows another embodiment of a set consisting of an adapter 10 and a blank 50. In this embodiment, the blank 50 is intended for the manufacture of a bridge as a dental prosthesis part 200. The adapter 10 is provided with a connecting part 30 by which the adapter 10 can be clamped in a clamping device of a machine tool.

[0062] The adapter 10 further comprises a Y-shaped, or fork-shaped, connecting portion 40. The connecting portion 40 is connected at one end to the connecting portion 30. An abutment portion 20 is provided at each of the other two ends. The shape and dimensions of the abutment portions 20 and their relative arrangement are adapted to fit two abutment teeth (not shown here). The blank 50 has two recesses 52 and is connected to both abutment portions 20. This allows the connecting portion 30 to be clamped in a clamping device and the blank 50 to be converted into a bridge, additively and / or subtractively.

[0063] The bridge can then be separated from the adapter 10 and inserted into the patient's mouth.

[0064] FIG. 6 shows another embodiment of a set, which is used to make a large bridge. In its intended use, the bridge is placed over two abutment teeth (not shown), with two more vacant tooth positions between them. In this embodiment, the set is made up of two adapters 10 and one blank 50. Each adapter 10 has an abutment portion 20 corresponding to the shape and dimensions of one of the two abutment teeth. Both adapters 10 each have a connecting portion 30 designed to be coupled to a clamping device (not shown) of a machine tool, so that the two abutment portions 20 can be positioned and oriented to correspond to the situation in the patient's mouth.

[0065] In this embodiment, the blank 50 has two recesses 52 corresponding to the two abutments 20, respectively. The recesses 52 are arranged so that one of the two abutments can be received at a time. In this manner, the blank 50 can be connected to both adapters 10 simultaneously. This allows the position and orientation of the blank 50 to be known in the machine tool, allowing the blank to be machined with great precision.

[0066] 7 shows a schematic process sequence of a method for manufacturing a dental prosthetic part connectable to an abutment tooth. In step 1010, the shape and dimensions of the abutment tooth are first recorded, thereby obtaining an abutment data set. Next, in step 1020, the abutment data set is used to manufacture an adapter for a machine tool. The adapter has an abutment part whose shape and dimensions correspond to those of the abutment tooth and a connecting part that can be coupled to a clamping device of the machine tool.

[0067] In parallel, in step 1030, the abutment data set is used to manufacture a blank for a dental prosthesis component, the blank having a recess capable of at least partially accommodating the abutment tooth.

[0068] In step 1040, the adapter and the blank are joined together, with the abutment portion of the adapter at least partially received in the recess of the blank, and then in step 1050, the connecting portion of the adapter is clamped with a clamping device of the machine tool.

[0069] The blank is then additively and / or subtractively converted into a dental prosthetic part by a machine tool in step 1060. Among other things, the blank is coated.

[0070] The completed dental prosthesis part is removed from the adapter in step 1070. The dental prosthesis part can then be used, i.e. inserted into the mouth of the patient.

[0071] 8 shows an adapter blank part 80 comprising an adapter 10 and a blank 50. The adapter 10 and blank 50 are joined together. In this embodiment, the adapter 10 does not have an abutment. Rather, the adapter 10 is connected to the blank 50 at one end and is provided at the other end with a coupling 30 designed for coupling to a clamping device (not shown) of a machine tool. A connecting portion 40 connects both ends of the adapter 10.

[0072] Because the shape and dimensions of adapter blank 80 are known and adapter blank 80 is precisely positioned within the machine tool, blank 50 can be machined very precisely. Furthermore, adapter blank 80 can be removed and reinserted as many times as necessary without affecting the accuracy of the machining.

[0073] The set shown in Figure 9 includes an adapter 10 and a blank 50. The blank 50 comprises a recess 52 for an abutment tooth (not shown here) and an outer surface 54 to be reworked.

[0074] In this embodiment, the adapter 10 is composed of multiple parts. The first adapter part 12 is composed of a connecting portion 30 and a first connecting portion 42. The second adapter part 14 is composed of an abutment part 20 and a second connecting portion 44. The connecting portions 42 and 44 are complementary to each other and can be temporarily connected to each other, for example, with an adhesive. These together constitute the connecting portion 40 of the adapter 10. Due to the multiple parts, the first adapter part 12 can also be connected to other second adapter parts 14 that fit other abutment teeth, making it reusable. [Explanation of symbols]

[0075] 10 Adapters 12 First adapter part 14 Second adapter part 20 Abutment 30 Connecting part 40 Connection 42 First connection 44 Second connection 50 blank 52 recess 54 Outer surface 60 Adhesive 80 Adapter blank parts 100 Jaw 110 Abutment tooth 112 Lower area 114 Upper area 116 Gums 200 Dental prosthetic parts 210 Cement

Claims

1. A method for manufacturing a dental prosthesis part (200), in particular a fixed dental prosthesis part (200), connectable to an abutment tooth (110), comprising the steps of: a) providing an abutment data set comprising 3D data relating to the shape and dimensions of said abutment tooth (110); b) using said abutment data set to manufacture an adapter (10) for a machine tool, said adapter (10) having an abutment part (20) that corresponds in particular to the shape and dimensions of said abutment tooth (110) and a coupling part (30) that can be coupled to a clamping device of the machine tool, and c) using said abutment data set to manufacture a blank (50), said blank (50) having a recess (52) capable of at least partially receiving said abutment tooth (110); d) connecting said blank (50) to said adapter (10), in particular said abutment part (20) of said adapter (10) being at least partially received in said recess (52) of said blank (50); and e) clamping the connection part (30) in the clamping device of the machine tool; f) additively and / or subtractively reworking said blank (50) into said dental prosthesis part (200) using said machine tool; g) removing said dental prosthesis part (200) from said adapter (10).

2. 2. The method according to claim 1, wherein the adapter (10) in step b) and / or the blank (50) in step c) are manufactured by casting, machining, in particular including milling, grinding and / or turning, and / or additive manufacturing methods.

3. 3. The method according to claim 1 or 2, wherein in step a) the abutment data set is provided by determining the shape and dimensions of the abutment tooth (110).

4. 4. The method of claim 3, wherein the shape and dimensions of the abutment (110) are determined directly in the patient's mouth or by scanning a model.

5. 5. A method according to any one of claims 1 to 4, wherein in step d) the blank (50) is removably attached, in particular glued, to the adapter (10).

6. 6. The method according to claim 1, wherein the shape and dimensions of the recess (52) in step c) are designed so that an intermediate space remains between the recess (52) and the support part (20) when the recess (52) is connected in step d), and the intermediate space is filled with a connecting material.

7. 7. The method according to any one of claims 1 to 6, wherein in step g) the dental prosthesis part (200) is detached from the adapter (10) by melting the adhesive bond, in particular in an oven.

8. The method according to any one of claims 1 to 7, wherein the additive re-processing in step f) comprises coating and / or the subtractive re-processing in step f) comprises milling, grinding and / or polishing.

9. 9. The method according to any one of claims 1 to 8, wherein steps b), c) and d) are combined to produce the adapter (10) and the blank (50) in one piece.

10. 9. An adapter (10) for a machine tool, which is particularly manufactured by step b) of the method according to any one of claims 1 to 8, and which has an abutment part (20) whose shape and dimensions correspond to the abutment tooth (110) and a connecting part (30) that can be connected to a clamping device of the machine tool.

11. 11. The adapter (10) of claim 10, wherein the adapter (10) has a plurality of abutment portions (20) each corresponding in shape and size to a different abutment tooth (110), and / or the adapter (10) is multi-piece, with one adapter part (14) of the multi-piece adapter (10) having the abutment portion (20) and another adapter part (12) of the multi-piece adapter (10) having the connecting portion (40).

12. A blank (50) for a dental prosthesis part (200) manufactured by step c) of the method according to any one of claims 1 to 8, the blank having a recess (52) capable of at least partially receiving an abutment tooth (110).

13. A set consisting of at least one adapter (10) according to claim 10 or 11 and at least one blank (50) according to claim 12, wherein the abutment part (20) of the at least one adapter (10) and the recess (52) of the at least one blank (50) are adapted to fit the same abutment tooth (110).

14. 12. A set of multiple adapters (10) according to claim 10 or 11, wherein the connection portion (30) is the same for each adapter (10) and the abutment portion (20) of each of the adapters (10) is different.

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