Material-consumption-optimised production of prosthetic teeth

Abstract

The invention relates to a method for producing a dental prosthesis in accordance with a virtual three-dimensional model, comprising the steps of: A) generating the model using a CAD method in accordance with a virtual three-dimensional model of a dental prosthesis; B) selecting an inlay element (7) depending on the model of a prosthetic tooth; C) selecting a milling body (1) having a suitable recess (3) or making a suitable recess (3) in a milling body (1); D) inlaying or inserting the inlay element (7) into the recess (3), the inlay element (7) or plurality of inlay elements (7) in a row together having the same geometric shape as the recess (3); E) fixing the inlay element (7) in the recess (3); F) fixing the milling body (1) in a CAM device; and G) carving the prosthetic tooth from the at least one inlay element (7) using the CAM device in accordance with the model. The invention also relates to a modular milling-body system and to a device for carrying out such a method.

Description

[0001] “Material consumption-optimized production of prosthetic teeth”

[0002] Description

[0003] The invention relates to a method for producing a dental prosthesis, wherein the dental prosthesis has at least one prosthetic tooth and a prosthetic base, wherein the prosthetic base comprises a gum-colored plastic, and wherein the at least one prosthetic tooth and the prosthetic base are firmly connected to one another during the method, and wherein the at least one prosthetic tooth is manufactured using a method for producing at least one prosthetic tooth using a subtractive CAM method according to at least one virtual three-dimensional model of the at least one prosthetic tooth. Furthermore, the present invention relates to a modular milling body system for producing a dental prosthesis with at least one prosthetic tooth and a device for implementing the aforementioned method.

[0004] Dental prostheses, also known as dental prosthetics, consist of a denture base and one or more denture teeth and serve to complement existing remaining dentition. In addition to the tooth-colored denture teeth and gum-colored denture base of the dental prosthesis, a support structure may also be present as a support or holding structure or may be required as a load-bearing component of the functional elements. Traditionally, for example, metal model castings are used, to which denture resin and denture teeth are attached using the same procedure.

[0005] In addition to traditional techniques, digital manufacturing methods are also gaining increasing importance in the dental field. For several years now, dental prostheses, such as partial and full dentures, denture teeth, crowns, bridges, and occlusal splints, have been manufactured using subtractive milling techniques using CAD / CAM (Computer-Aided Manufacturing, CAD - Computer-Aided Design). CAD / CAM processes are also increasingly being used in the manufacture and design of denture teeth and partial and full dentures with denture bases resting on the gingiva and denture teeth attached or arranged within them.

[0006] Digital processes allow the production of denture teeth, denture bases, support structures, and other dental molds using subtractive manufacturing processes, such as milling, or additive manufacturing processes, such as sintering. Tooth-colored denture teeth or even gum-colored elements can also be digitally prefabricated.

[0007] REPLACEMENT BLADE (RULE 26) Preformed blanks are typically used as milling bodies for the fabrication of denture teeth. These can be discs or smaller parts such as milling blocks. What all of these blanks have in common is that they are made of a material base with the same properties throughout their entire body, for example, the same color and material composition.

[0008] For the production of prosthetic teeth using milling technology, milling blocks with a holder attached on one side are used for smaller prosthetic work such as individual crowns and round blanks. The round blanks are fixed in holding systems and machined on both sides using a multi-axis milling process.

[0009] During the digital design of prosthetic work, especially partial or complete dentures, the construction is divided into a "white" or tooth-colored tooth portion (the denture tooth or teeth) and a gum-colored ("pink") denture base portion (the denture base). Dental prostheses therefore consist of a gum-colored or pink denture base and tooth-colored portions (the denture tooth or teeth).

[0010] There are methods, such as those known from DE 10 2009 056 752 A1 or WO 2013 / 124 452 A1, in which a dental partial or full denture is digitally constructed and produced using CAD / CAM methods. Patent DE 103 04 757 B4 discloses a method for producing dental prostheses in which the denture teeth are virtually positioned in a virtual model and a denture base is produced on the basis of the virtual model. EP 2 742 906 A1 discloses a method in which a dental arch is bonded to an impression material, wherein the impression material is contained in an individualized impression tray and contains an impression of the patient's oral cavity. The surface of the mold with the dental arch is digitized and then a virtual model of the dental arch is computer-generated and positioned and oriented as closely as possible in the virtual model of the denture base.

[0011] Digital full or partial dentures require denture teeth that can be bonded clearly and reproducibly to the denture base.

[0012] WO 2016 / 091 762 A1 discloses a method for producing a dental prosthesis, in which a template is created with which several prosthetic teeth can be attached to a prosthetic base in the desired position and orientation relative to one another. The prosthetic teeth are shortened by basal grinding in a cervical region to achieve the desired bite height. WO 2016 / 110 392 A1 discloses a method for producing a dental prosthesis, in which a plastically deformable connecting means is introduced into the tooth sockets of a prosthetic base to facilitate manual

[0013] REPLACEMENT LEAF (RULE 26) To enable correction of the alignment of the denture teeth in the denture base. DE 10 2008 019 694 B3 discloses a method and device for producing dental molded bodies from ceramic using a laser. EP 2 571 451 B1 and EP 2 666 438 A2 disclose methods for producing dental prostheses in which prefabricated denture teeth are embedded in wax in a holder and then milled cervically using a CAM process. It is necessary to shorten the denture teeth basally (or cervically) in order to adapt the tooth height to the patient's jaw, i.e., to adjust the bite height of the dental prosthesis to suit the patient's needs. WO 2014 / 159 436 A1 discloses a layered dental prosthesis with a reinforcement in the prosthesis base, which is cast into a basal cavity.

[0014] In both additive and subtractive manufacturing, connecting the denture base and denture teeth presents a significant challenge. A critical aspect remains the connection of the digitally manufactured parts to one another, particularly with regard to the precision of their alignment. Bonding, even with the use of positioning aids such as fixation keys, always results in a more or less severe misfit that must be manually corrected by the dentist. The connection is usually achieved by bonding, whereby the quality of the transitions can be compromised by using too little or too much adhesive, as well as the correct positioning of the denture teeth during bonding.Also available are one-piece, two-tone (gum-colored and tooth-colored) milling blanks, which have a very good bond between the layers, but the aesthetics are always a compromise and therefore unsatisfactory due to the given phase boundaries.

[0015] US 2009 / 0023112 A1 discloses providing a plurality of sub-blanks in a holder to reduce the amount of milling waste during the production of crowns, abutments, and bridges. KR 1020160003528 A discloses a template with multiple recesses in which dental molds can be secured. DE 20 2015 004 759 A1 proposes filling a recess in a milling blank with a fluid material, which is subsequently hardened and used to produce dental prostheses.

[0016] US 2013 / 0101962 A1 discloses a method for producing a dental prosthesis, wherein several recesses are milled into a block along a dental arch, wherein several plastics are filled into the recesses, and in between, the prosthetic teeth are manufactured from the plastics cured in the recesses. The block is then largely removed, and the prosthetic base is manufactured from the block. The method is a multi-stage milling process. A disadvantage of the method according to US 2013 / 0101962 A1 is the large

[0017] REPLACEMENT LEAF (RULE 26) Material loss and the time required to remove the material from the block as well as the wear and tear of the tools required for this. EP 2 915 503 B1 discloses a reverse method for producing a dental prosthesis, in which a milling blank made of an enamel material is subtractively machined to create a cavity that is used as a negative mold for a denture base of a dental prosthesis. The occlusal side and the basal side of the dental prosthesis are then subtractively manufactured from the composite thus created. This is also a multi-stage milling process. A disadvantage of a method according to EP 2 915 503 B1 can be that very large quantities of the relatively hard enamel material and the other materials have to be removed in order to produce the dental prostheses.This could not only result in the loss of a large amount of enamel and other materials, but the milling tools could be subjected to intensive stress and the time required to implement the procedure would be relatively long.

[0018] If a multi-stage process is chosen in which the denture teeth and / or the denture base are to be manufactured from several different materials, the material consumption and thus the time required and the tool load are increased again.

[0019] Even when manufacturing denture teeth from round blanks used as milling bodies, the material consumption for the denture teeth is enormous. Especially when individual denture teeth are milled from a round blank, a large amount of the material from which the denture teeth are made is left over.

[0020] When manufacturing dental prostheses with denture bases, one disadvantage of conventional methods can be that either the denture teeth or the denture base must be made of castable plastics such as PMMA-based materials. This limits the choice of materials.

[0021] The following state-of-the-art options exist for the production of digitally designed dental prostheses:

[0022] 1. Milling or printing the gum-colored denture base and bonding it to artificial denture teeth, or alternatively, to milled or printed tooth-colored segments. Disadvantages of this approach include inaccurate manufacturing, time-consuming processing, aesthetic challenges due to excess adhesive or underfilling of marginal gaps, and limitations regarding the millability of cavities due to undercuts.

[0023] 2. Milling of prefabricated milling discs with an integrated two-phase structure. Here, an attempt can be made to achieve a natural aesthetic through the clever arrangement of the transitions.

[0024] REPLACEMENT LEAF (RULE 26). The position of the transitions from gum color to tooth color can be disadvantageous, as this always represents a compromise and is aesthetically unsatisfactory.

[0025] 3. Milling of preformed denture teeth into which prefabricated denture teeth are already integrated. With these procedures, only the basal side of the dental prosthesis is custom-made. The disadvantage of this approach is that compatibility with individual patient cases is extremely limited and many variants of preformed denture teeth must be kept in stock.

[0026] 4. Layered construction of a dental prosthesis consisting of tooth-colored individual layers and a denture base by repeatedly milling and refilling the milled cavities. Disadvantages of this approach include significant material loss and time expenditure.

[0027] One object of the invention is to at least partially overcome at least one disadvantage or several disadvantages of the prior art. In particular, possibilities are to be found for providing a method for producing at least one prosthetic tooth and a method for producing a dental prosthesis comprising at least one such prosthetic tooth, as well as a device for implementing such methods, in which a smaller proportion of the material required to produce the prosthetic teeth is consumed. In addition, the tools of the CAM device used, in particular the CAM milling machine, are to be protected. The methods should be as easy and cost-effective to implement as possible. In addition to the method, a device for implementing such a method and a modular milling body system for producing a dental prosthesis are to be found, which can at least partially achieve these advantages.

[0028] The processes should enable fast and resource-efficient production using subtractive CAM processes and, where appropriate, additional additive CAM processes. Ideally, where possible, the process for producing the dental prosthesis should not only use as little material as possible for the prosthetic teeth, but also require as little removal of the material for the prosthetic base as possible. Production can be largely based on digital manufacturing techniques. In particular, it should be possible to join the materials together during the process. The choice of materials should be as flexible as possible. In particular, it may be advisable to avoid having the prosthetic teeth and the prosthetic base consist entirely of a hardened and previously liquid plastic. The process should be as simple and inexpensive as possible for the dental technician to implement.In particular, fully automated or as largely automated as possible techniques such as CAD / CAM technologies should be used and usable.

[0029] REPLACEMENT LEAF (RULE 26) The features of independent claims 1, 22 and 31 contribute to at least partially fulfilling at least one of the aforementioned objects. Dependent claims 2 to 21 and 23 to 30 provide preferred embodiments that contribute to at least partially fulfilling at least one of the objects. Consequently, a method according to claim 1, a modular milling body system for producing a dental prosthesis according to claim 22 and a device for implementing such a method according to claim 31 at least contribute to at least partially achieving the objects. Preferred variants are claimed in subclaims 2 to 21 and 23 to 30.

[0030] The objects of the invention are thus at least partially or contributively achieved by a method for producing a dental prosthesis, wherein the dental prosthesis comprises at least one prosthetic tooth and a prosthetic base, wherein the prosthetic base comprises a gum-colored plastic, and wherein the at least one prosthetic tooth and the prosthetic base are firmly connected to one another in the method, wherein the at least one prosthetic tooth is produced using a subtractive CAM method in accordance with at least one virtual three-dimensional model of the at least one prosthetic tooth, wherein the method comprises the following chronological steps:

[0031] A) generating at least one virtual three-dimensional model of the at least one prosthetic tooth using a CAD method in accordance with a virtual three-dimensional model of the dental prosthesis;

[0032] B) selecting at least one insert element depending on the at least one virtual three-dimensional model of the at least one prosthetic tooth, wherein the selection is made such that the volume of the at least one prosthetic tooth can be completely accommodated in the volume of the at least one insert element;

[0033] C1) Selecting a milling body with at least one recess matching the at least one insert element, so that the at least one insert element can be inserted into the at least one recess in a fit, or

[0034] C2) Creating at least one recess in a milling body, wherein the at least one recess is created to fit the at least one insert element, so that the at least one insert element can be inserted into the at least one recess in a fit;

[0035] D) Inserting or plugging the at least one insert element into the at least one recess in the milling body, wherein individual ones of the at least one insert element(s) or several of the at least one insert element(s) placed together have the same geometric shape as the at least one recess and are inserted individually or placed together in the respectively matching at least one recess;

[0036] E) Fixing the at least one insert element in the at least one recess by embedding, by polymerizing or by gluing the at least one insert element

[0037] REPLACEMENT LEAF (RULE 26) in an embedding material within the at least one recess or by press fitting the at least one insert element in the at least one recess;

[0038] F) Fixing the milling body in a CAM fixture; and

[0039] G) Working out the at least one prosthetic tooth with the CAM device according to the at least one virtual three-dimensional model of the at least one prosthetic tooth from the at least one insert element.

[0040] A dental prosthesis within the meaning of the present invention comprises a prosthesis base (usually made of a gum-colored ("pink") plastic) and at least one prosthetic tooth (usually made of a tooth-colored plastic or a tooth-colored ceramic). Additionally, the dental prosthesis may also comprise a support structure, which may be made of metal or plastic, for example, and which serves to secure the dental prosthesis in the patient's oral cavity. A dental prosthesis may be a partial denture or a full denture.

[0041] In the present case, a fit of the at least one insert element in the at least one recess means that the external shape of the at least one insert element corresponds to the shape of at least one of the at least one recess(es). In particular, it can be provided that, when fitted, there is a uniform gap (preferably a maximum of 5 mm, particularly preferably a maximum of 1 mm, very particularly preferably a maximum of 0.1 mm) between the inserted at least one insert element and the peripheral edge of the matching at least one recess, or that the at least one insert element can be inserted into the matching at least one recess with a press fit.

[0042] A press fit is understood to be a fit in which the at least one insert element is in direct contact with two opposing walls or wall parts of the at least one recess and in which, due to elastic deformation or an elastic force of the at least one insert element and / or the material of the milling body, pressure is exerted on the at least one insert element, which holds the at least one insert element in the at least one recess and thereby fastens it. The pressure can be very slight or only localized. The press fit does not have to run along the entire circumference of the at least one insert element. Likewise, the uniform gap of contact points or contact surfaces can be interrupted by the at least one insert element resting on the contact points or contact surfaces on the outer circumference.

[0043] By means of a fit, a clear assignment of the respective insert element or the combined several insert elements to the respective recess can be achieved and the desired position and orientation of the respective insert element or the combined insert elements in the respective recess can be determined.

[0044] REPLACEMENT LEAF (RULE 26) In this case, several insert elements are inserted or inserted into the at least one recess in pairs or groups and adjacent to one another. However, according to the invention, preferably exactly one insert element is inserted or inserted into a recess.

[0045] Machining the at least one prosthetic tooth out of the at least one insert element means that at least 80% of the surface, preferably at least 90% of the surface of the at least one prosthetic tooth is finished after step G) and – except for polishing or surface finishing – has the desired shape. Typically, a bar or bars or other thin connections remain between the at least one prosthetic tooth and the remaining milling body during the CAM process, so that the at least one prosthetic tooth remains held over the milling body and connected to the CAM device. These are manually separated after completion of the CAM process, and the remnants of the connection are reworked.

[0046] Preferably, at least 80% of the surface(s) of the at least one insert element are machined in step G), particularly preferably at least 90% of the surface(s) of the at least one insert element are machined in step G).

[0047] The at least one insert element preferably has a geometric shape, but can alternatively also have an approximate tooth shape.

[0048] For each prosthetic tooth, a separate three-dimensional virtual model can be created using the CAD process in step A. However, groups of prosthetic teeth can also be created as a coherent three-dimensional virtual model using the CAD process in step A. The latter has the advantage that contiguous tooth areas can be manufactured together.

[0049] It may be provided that the at least one insert element is not an anatomically preformed or prefabricated prosthetic tooth. This clarifies that the occlusal regions of the at least one prosthetic tooth are also to be milled out of the at least one insert element.

[0050] In methods according to the invention, it can be provided that in step G) when machining the at least one prosthetic tooth, the entire surface of the at least one insert element exposed in the milling body is machined, in particular the entire surface of the at least one insert element is machined down to a holding geometry.

[0051] This clarifies that the at least one insert element can preferably be in the form of a body of any shape. Therefore, it may be sufficient to have a small number of possible insert elements available for the production of the denture teeth in order to cover all

[0052] REPLACEMENT LEAF (RULE 26) possible prosthetic teeth from it. The holding geometry can be realized, for example, by bars that connect the prosthetic teeth machined from the at least one insert element in step G) with the remaining milling body. At least partial areas of the holding geometry, in the areas adjacent to the prosthetic teeth, consist of the material of the at least one insert element from which the prosthetic teeth were consolidated. The holding geometry is separated in a final step in order to isolate the prosthetic teeth individually or in groups and to separate them from the milling body. The separation can be achieved, for example, by free cutting, breaking the holding geometry, and / or free milling.

[0053] Furthermore, it can be provided that in step A) the virtual three-dimensional model of the dental prosthesis is created by CAD construction and adaptation to a virtual three-dimensional model of the oral cavity situation of a patient.

[0054] This further automates the process according to the invention and can be carried out largely in a computer-assisted manner.

[0055] Furthermore, it can be provided that in step B) the selection of the at least one insert element is additionally carried out depending on the function and / or the position of the prosthetic tooth in the dental prosthesis, wherein the selection of the at least one insert element is preferably carried out with regard to the color, the transparency and the mechanical physical properties of the at least one insert element.

[0056] This allows, for example, molars to have a different color, hardness, and elasticity than canines and incisors. This allows each tooth to exhibit the physical properties appropriate for its purpose and, through coloration, can be adapted to resemble a natural dentition.

[0057] It can also be provided that in step B) the selection of at least one insert element is additionally carried out depending on an individually determined colour selection and / or colour selection computer-assisted by colour matching.

[0058] This enables a particularly aesthetically pleasing dental prosthesis.

[0059] It can further be provided that after step 02) an electronic storage of the shape of the at least one depression produced in step 02) together with an identifier of the milling body takes place, so that in subsequent methods the milling body with the depression produced in step 02) is available as a selectable milling body in the context of a step 01).

[0060] This allows for the reuse of machined milling bodies with recess(es) suitable for subsequent processes. This makes the process resource-efficient.

[0061] REPLACEMENT BLADE (RULE 26) and in the future the time required to produce at least one recess can be saved.

[0062] It can also be provided that the embedding material is a wax or an adhesive or a polymerizable plastic, which is used in liquid form in step E) for fastening the at least one insert element, wherein preferably the wax is removed in step H) by scalding or melting or chemically or the polymerizable plastic or the adhesive is chemically dissolved.

[0063] It is theoretically also possible to use a combination of different materials (wax, adhesive and / or plastic) to fix the at least one insert element in step E).

[0064] For the aforementioned embedding materials, a stable attachment of at least one insert element is possible (this applies in particular to the polymerizable plastic and the adhesive), and the embedding material can be removed again without great effort (this applies in particular to the wax). By removing the embedding material, the milling body can subsequently be reused with a method according to the invention.

[0065] Preferably, it can be provided that the at least one insert element has a symmetrical geometric shape with at least one mirror symmetry plane and / or at least one rotational symmetry axis, preferably a cuboid shape, a cylindrical shape, a cylindrical shape with a triangular base, a cylindrical shape with a triangular base with rounded edges of the triangular base, a bar shape or a trapezoidal shape.

[0066] A cylindrical shape is understood to mean the shape of a general cylinder with any base area and not only a cylinder with a circular base area, unless the shape of the base area is specified.

[0067] These shapes allow for easy insertion of the at least one insert element into the at least one recess. Furthermore, these shapes represent good approximations to a general tooth shape, so that the amount of material to be removed from the at least one insert element remains minimal.

[0068] According to a further development, it can be provided that after step G) the at least one prosthetic tooth is separated from the milling body and the remains of the at least one insert element and preferably the remains of the at least one insert element are removed from the at least one recess, wherein particularly preferably the embedding material is also removed from the at least one recess.

[0069] REPLACEMENT BLADE (RULE 26) This separates the at least one prosthetic tooth from the milling body and can then, if necessary after final processing (deburring, hardening, surface treatment, and / or polishing), be used to construct the dental prosthesis. For this purpose, the at least one prosthetic tooth can be inserted into a prosthetic base manufactured using a CAD / CAM process and secured there, particularly preferably by gluing the at least one prosthetic tooth into the tooth sockets of the prosthetic base.

[0070] Preferably, after separating the at least one prosthetic tooth from the milling body and the remnants of the at least one insert element, at least 95% of the surface of the at least one insert element has been removed from the at least one prosthetic tooth, particularly preferably at least 99% of the surface has been removed from the at least one prosthetic tooth. This clarifies that the at least one insert element is not a prefabricated prosthetic tooth.

[0071] Furthermore, it can be provided that in step B) each prosthetic tooth is assigned its own separate insert element or several groups of adjacent prosthetic teeth are each assigned its own separate insert element, wherein the groups of adjacent prosthetic teeth are preferably grouped into groups of molar prosthetic teeth and incisor prosthetic teeth and canine prosthetic teeth or of molar prosthetic teeth, incisor prosthetic teeth and canine prosthetic teeth.

[0072] This allows the inlays to be pre-shaped and, if necessary, colored to match the denture teeth to be fabricated. Furthermore, inlays with suitable mechanical and physical properties can be selected. Molars are also known as back teeth, incisor dentures as incisors, and canine dentures as canines.

[0073] The objects underlying the present invention are at least partially also achieved by a method for producing a dental prosthesis, wherein the dental prosthesis has at least one prosthetic tooth and a prosthetic base, wherein the prosthetic base has a gum-colored plastic and wherein the at least one prosthetic tooth and the prosthetic base are firmly connected to one another in the method, wherein the at least one prosthetic tooth is manufactured using one of the previously described methods according to the invention.

[0074] The process for manufacturing the dental prosthesis utilizes the advantages of the process for manufacturing the prosthetic teeth.

[0075] REPLACEMENT SHEET (RULE 26) It may be provided that the procedure for implementing step G) includes the following steps:

[0076] H) Producing a connecting surface between the at least one prosthetic tooth and the prosthetic base in the at least one insert element and producing a negative mold of at least a partial area of ​​the oral surface of the prosthetic base of the dental prosthesis to be produced in a surface of the milling body and in the at least one insert element, and if present in the embedding material, with the aid of a subtractive CAM process in accordance with the virtual three-dimensional model of the dental prosthesis, wherein the connecting surface and the negative mold are adjacent to one another;

[0077] I) filling at least one fluid polymerizable plastic into the connecting surface and into the negative mold and into the volume removed in step H) and curing the at least one fluid polymerizable plastic, wherein the curing of the at least one fluid polymerizable plastic produces a cured plastic material which is firmly and flush-bonded to the material of the insert element; and

[0078] J) Subtractive machining of the cured plastic material from the direction of an upper side of the milling body containing the at least one recess using a CAM method in accordance with a basal surface of the virtual model of the dental prosthesis and subtractive machining of the milling body from the direction of an underside of the milling body opposite the upper side of the milling body using a CAM method in accordance with an occlusal surface of the virtual model of the dental prosthesis or in accordance with an occlusal surface and an oral surface of the virtual model of the dental prosthesis, so that the dental prosthesis is subtractively machined from the cured plastic material and the material of the at least one insert element connected thereto.

[0079] In this process, a wax or a polymerizable plastic is preferably used as the embedding material, if an embedding material is required. A gum-colored plastic is particularly preferably used as the embedding material in step E). The fluid polymerizable plastic used in step I) can preferably also be used previously as an embedding material in step E).

[0080] In this way, the milling body can also be used directly to fabricate the denture base from the fluid, polymerizable resin. For this purpose, it is important that all denture teeth, which are manufactured from insert elements inserted or plugged into the milling body and secured during or after the milling process, have the position and orientation relative to each other as intended in the final denture base. Additional denture teeth can also be inserted separately into the denture base, if desired.

[0081] REPLACEMENT LEAF (RULE 26) and attached to the denture base. However, this procedure is preferably used to fabricate all denture teeth of the dental prosthesis from the attached inserts.

[0082] A support structure can be incorporated into the denture base by attaching it to the milling body prior to step I) and embedding it in step I) with at least one fluid polymerizable resin. The milling body may not be reusable in this application. Instead, a complete dental prosthesis can be constructed based on the milling body.

[0083] It can be provided that the negative mold of at least the partial area of ​​the oral surface of the prosthesis base of the dental prosthesis to be produced, which is produced in step H) in the surface of the milling body and in the at least one insert element, and if present in the embedding material, is produced with an offset, wherein the offset increases the volume of the virtual model of the dental prosthesis.

[0084] An offset for the negative shape of the partial area of ​​the surface of the dental prosthesis is understood to mean an expansion of the surface of the dental prosthesis, in particular a uniform expansion of the surface of the dental prosthesis, toward a larger volume of the dental prosthesis. This ensures that the subsequent subtractive machining from the direction of the underside of the milling body opposite the at least one recess (in particular the occlusal direction of the dental prosthesis) can be carried out according to the virtual model without the offset in the cured plastic.This ensures that after the subtractive machining of the milling body from the direction of the underside of the milling body, no residues of the first material remain on the surface of the dental prosthesis, thus preventing the aesthetic appearance and / or physical properties of the dental prosthesis produced using the method from being negatively affected. The offset can, for example, and preferably according to the invention, be achieved by mathematically supplementing the surfaces of the virtual model of the dental prosthesis oriented towards the underside of the milling body, which are not intended to consist of the material of the insert elements, with a distance vector. The distance vector can be oriented towards the underside of the milling body, so that a parallel displacement of the surfaces of the virtual model of the dental prosthesis, which are not intended to consist of the first material, occurs.Alternatively, the distance vector can also be arranged perpendicular to the surface of the virtual model of the dental prosthesis, so that the relevant surfaces of the virtual model are evenly extended. Other equivalent or similar possibilities for applying a distance vector or other calculation methods to generate the offset are readily conceivable and feasible for the skilled person.

[0085] REPLACEMENT LEAF (RULE 26) Furthermore, it can be provided that in step I) at least one of the at least one fluid polymerizable plastics wets the entire surface of at least the surfaces produced in step H) in the at least one insert element during filling.

[0086] This ensures that a stable connection is created between the material of the at least one insert element and the cured plastic material and thus between the at least one prosthetic tooth and the prosthetic base.

[0087] Furthermore, it can be provided that the dental prosthesis has a support structure, wherein the support structure is firmly connected to the prosthesis base or to the prosthesis base and the at least one prosthetic tooth, wherein the support structure is provided for fastening the dental prosthesis in the oral cavity of a patient, wherein the at least one prosthetic tooth and the prosthetic base and the support structure are firmly connected to one another in the method.

[0088] As a result, a dental prosthesis with a support structure for fastening the dental prosthesis in the oral cavity, in particular a dental partial prosthesis with such a support structure, can be produced using the method according to the invention.

[0089] It can be provided that the support structure consists of or is manufactured from a material with a greater hardness and / or elasticity than fully cross-linked PMMA and / or the support structure is manufactured from metal, ceramic, stainless steel, titanium or a titanium alloy.

[0090] For the hardness of fully cross-linked PMMA, a ball indentation hardness of 195 MPa is assumed according to ISO 2039-1.

[0091] For the elasticity of fully cross-linked PMMA, a tensile modulus of elasticity according to ISO 527 of approximately 3200 MPa and / or a tensile strength according to ISO 527 of approximately 73 MPa is assumed.

[0092] A contribution to solving at least one sub-area of ​​the present invention is also made by a modular milling body system for producing a dental prosthesis, wherein the modular milling body system has at least one milling body and a plurality of insert elements, wherein at least one recess is provided on one side of the milling body, wherein the at least one recess has a geometric shape and the at least one recess is formed to receive at least one of the insert elements in a fit, wherein the insert elements, individually or placed against one another, have the same geometric shape as the at least one recess.

[0093] In the present case, a fit of the at least one insert element in the at least one recess is to be understood as meaning that the outer shape of the at least one insert element corresponds to the shape of at least one of the at least one recess(es). In particular,

[0094] REPLACEMENT LEAF (RULE 26) It should be provided that there is a uniform gap between the at least one insert element and the peripheral edge of the matching at least one recess, or that the at least one insert element can be inserted into the matching at least one recess with a press fit. A fit can achieve a clear assignment of the respective insert element to the respective recess and determine the desired position and orientation of the respective insert element in the respective recess.

[0095] A recess that fits one or more of the insert elements is the recess into which the insert element or several insert elements placed against one another can be inserted or inserted in a fit into this recess.

[0096] It can be provided that the at least one milling body has a solid body made of a first material, wherein the at least one recess is formed in the first material.

[0097] Furthermore, it can be provided that the insert elements, individually or when placed against one another, have the same geometric shape but are smaller than the matching at least one recess, so that when one insert element or several insert elements placed against one another are placed in the matching at least one recess, a uniform gap remains between the at least one insert element placed in the at least one recess and an inner circumferential side wall of the recess, wherein a gap size of the gap is preferably a maximum of 1 mm, particularly preferably at least 1 pm and a maximum of 1 mm, very particularly preferably at least 10 pm and 100 pm.

[0098] This allows the insert elements to be securely fastened in at least one recess with little or no embedding material.

[0099] It can be provided that the insert elements have a symmetrical geometric shape, preferably the insert elements have a symmetrical geometric shape with at least one mirror symmetry plane and / or at least one rotational symmetry axis, particularly preferably a cuboid shape, a cylindrical shape, a cylindrical shape with a triangular base area, a cylindrical shape with a triangular base area with rounded edges of the triangular base area, a bar shape or a trapezoidal shape.

[0100] A cylindrical shape is understood to mean the shape of a general cylinder with any base area and not just a cylinder with a circular base area, unless the shape of the base area is specified otherwise.

[0101] These shapes allow for easy insertion of the insert elements into a recess in at least one milling body. Furthermore, these shapes represent good approximations to a

[0102] REPLACEMENT BLADE (RULE 26) represents the general tooth shape so that the amount of material to be removed from the respective insert element remains small.

[0103] It can also be provided that the insert elements consist of at least one material for the production of prosthetic teeth, preferably at least two of the insert elements consist of at least two different materials for the production of prosthetic teeth.

[0104] This allows the denture teeth to be fabricated from the inlay elements. If multiple materials are used for different inlay elements, the material can be adapted to the specific denture tooth. For example, incisors can be fabricated with a different and adapted hardness and / or elasticity than molars or canines.

[0105] Furthermore, it can be provided that the insert elements have different sizes, in particular different heights, shape proportions and / or weights.

[0106] Furthermore, it can be provided that the insert elements have different colors and / or transparency, in particular have different tooth-colored colors and / or transparency.

[0107] This allows the modular milling body system to produce a more aesthetically pleasing and functional dental prosthesis.

[0108] Furthermore, it can be provided that the insert elements have a greater hardness than the material of the at least one milling body in which the at least one recess is formed.

[0109] This allows the milling body to be machined subtractively more easily than the inserts. This enables time-saving and resource-efficient production of dental prostheses with the modular milling body system.

[0110] According to a further development, it can be provided that the modular milling body system has at least one embedding material, in particular a wax, a polymerizable plastic and / or an adhesive, or has a cartridge for producing a fluid polymerizable plastic and / or a fluid adhesive as the embedding material with which the insert elements are to be fastened in the at least one recess of the at least one milling body.

[0111] This further complements the modular milling system. By selecting a suitable investment material, the fabrication of the dental prosthesis with the modular milling system can be further simplified.

[0112] REPLACEMENT BLADE (RULE 26) It can also be provided that a cavity for receiving a fluid polymerizable plastic is arranged on an upper side of the at least one milling body, wherein the cavity has a surface as a base, wherein the at least one depression is arranged in the surface, and the cavity is delimited laterally from the edge of the surface by a circumferential wall, wherein the circumferential wall is annular, wherein preferably the circumferential wall has a wall thickness of at most 20 mm, particularly preferably of at most 10 mm, very particularly preferably of at most 5 mm, and / or the circumferential wall is at least 5 mm high, particularly preferably at least 15 mm high.

[0113] An annular wall within the meaning of the present invention has a recess that encloses the geometric center of the recess. Preferably, the recess is formed without undercuts and / or each point in the recess can be connected in a straight line to every other point in the recess without the straight line running within the circumferential wall. Preferably, the recess is a compact geometric body. By providing and using a cavity for filling a fluid, polymerizable plastic as material for producing the prosthesis base on an upper side of a milling body for producing the dental prosthesis, it is possible to reduce the amount of material of the insert element(s) and the milling body that must be subtractively milled out or removed by skillfully selecting the position of the occlusal side of the dental prosthesis during the CAD calculation of the associated CAM process.It is then sufficient to place the basal surface of the more abrasion-resistant denture teeth or the occlusal part of the dental prosthesis in the area of ​​the surface of the cavity. The lighter and easier-to-mill plastic used to create the denture base or the basal part can then simply be filled into the created cavity and only needs to be filled to the desired height, thus saving the plastic material used to create the denture base. Every material saving automatically leads to time savings and protects the tools used, especially when particularly abrasion-resistant and durable materials are to be machined.

[0114] This allows a fluid, polymerizable plastic to be poured into the cavity for the production of the dental prosthesis without having to first create it in the milling body. This allows the modular milling body system to be used even more extensively for the production of a dental prosthesis.

[0115] It can be provided that a marking for determining a filling level in the cavity is arranged on at least one inner side and / or outer side of the circumferential wall delimiting the cavity, wherein the marking preferably has a

[0116] REPLACEMENT LEAF (RULE 26) Scale with equidistant calibration marks and / or numbers, particularly preferably a length scale for determining a filling level or a volume of a fluid polymerizable plastic in the cavity.

[0117] This allows the user to precisely fill the cavity with the desired amount of fluid, polymerizable plastic. This prevents material waste and simultaneously reduces the time required for subsequent subtractive machining of the milling body, thus potentially preserving the milling tools.

[0118] It can be provided that the circumferential wall of the at least one milling body is formed by a piece of pipe or an annular body which is fixed to the solid body.

[0119] These measures allow for simple and cost-effective production of the milling body.

[0120] It can be provided that the side of the at least one milling body in which the at least one recess is arranged is flat.

[0121] Furthermore, it can be provided that the at least one milling body is a round blank with a cylindrical outer circumference.

[0122] Furthermore, it can be provided that the at least one milling body has on its outer side a holder for fastening the at least one milling body to a suitable counter holder of a CAM device.

[0123] These measures also allow for simple and uncomplicated application of the modular milling body system.

[0124] Furthermore, it can be provided that the modular milling body system is suitable and intended for the implementation of a previously described method.

[0125] The modular milling body system is particularly well suited for implementing the method described above or according to the invention and benefits in particular from the above-mentioned measures and advantages of the methods described therein.

[0126] The objects underlying the present invention are at least partially also achieved by a device for implementing a previously described method, wherein the device has an insert element selection module and a milling body provision module, wherein the insert element selection module is designed such that the at least one insert element can be selected as a function of the at least one virtual three-dimensional model of the at least one prosthetic tooth, wherein the selection is made such that the volume of at least one prosthetic tooth of a dental prosthesis can be completely accommodated in the volume of the at least one insert element,

[0127] REPLACEMENT BLADE (RULE 26) and wherein the milling body provision module is designed such that the milling body with at least one recess matching the at least one insert element can be selected so that the at least one selected insert element can be inserted into the at least one recess with a fit, and / or the milling body provision module is designed such that a CAD model for at least one recess in a milling body can be calculated so that the at least one selected insert element can be inserted into the at least one recess with a fit.

[0128] The device has the advantages of the method according to the invention and can also utilize the advantages of the further developments of the method according to the invention.

[0129] In particular, the device according to the invention can be a device for producing at least one prosthetic tooth for a dental prosthesis or a device for producing a dental prosthesis with at least one prosthetic tooth, preferably with several prosthetic teeth.

[0130] In summary, the invention relates to a method for producing a prosthetic tooth according to a virtual three-dimensional model, comprising the steps:

[0131] A) Creating the model using a CAD process based on a virtual three-dimensional model of a dental prosthesis;

[0132] B) Selection of an inlay element depending on the model of the prosthetic tooth;

[0133] C) Selecting a milling body with a suitable recess or creating a suitable recess in a milling body;

[0134] D) inserting or plugging the insert element into the recess, whereby the insert element or several insert elements placed together have the same geometric shape as the recess;

[0135] E) Fixing the insert element in the recess;

[0136] F) Fixing the milling body in a CAM fixture; and

[0137] G) Working out the prosthetic tooth with the CAM device according to the model from at least one insert element.

[0138] The invention also relates to a modular milling body system for producing a dental prosthesis and a device for implementing such a method.

[0139] The invention is based on the surprising discovery that by using insert elements made of a material suitable for denture teeth and having a known and suitable geometry, which are embedded or press-fitted into a milling body, it is possible to mill denture teeth from the insert elements and thereby consume only a small amount of the material suitable for the denture teeth. Furthermore, the milling bodies can be used multiple times by inserting a

[0140] REPLACEMENT LEAF (RULE 26) Recess for accommodating new insert elements in subsequent manufacturing processes. A particularly precise fit of the insert elements in the recesses of the milling body is not important during embedding, since the insert elements can have a sufficient excess size so that the desired prosthetic tooth, digitally designed using the CAD process, finds sufficient space in the respective insert element. Of course, a particularly precise fit can further reduce the material waste of the insert element material suitable for the prosthetic teeth. However, this requires more precise positioning of the insert elements, which can be achieved, for example, with a press fit of at least one insert element in at least one recess of the milling body.

[0141] With the method according to the invention and with the aid of the modular milling body system for producing at least one prosthetic tooth, as well as with the device for implementing the method, the application of digital manufacturing techniques for producing the at least one prosthetic tooth is possible. Furthermore, a prosthetic base and, if desired, a support structure can also be directly connected to the prosthetic teeth manufactured according to the invention during the production of the dental prosthesis according to a virtual three-dimensional model of the dental prosthesis (the virtual three-dimensional model with or without a support structure), thereby ensuring time-saving and resource-conserving production during the implementation of the manufacturing method.

[0142] In the manufacture of dental prostheses, it is surprisingly possible to directly connect the denture teeth, created from multiple insert elements in the support structure, to the denture base of the dental prosthesis by calculating or creating the connection surface. This is achieved by filling the denture base with the polymerizable plastic. The connection surface is calculated based on the virtual three-dimensional models used—and, if necessary, additionally based on the virtual three-dimensional models created during the process—and is created in the milling body and the insert elements attached therein. This allows both the amount of fluid polymerizable plastic consumed and the amount of material from which the insert elements are made to be minimized.

[0143] By already roughly matching the final dimensions of the milling body, a significantly reduced material consumption can be achieved. A wider range of materials can also be used; there is no longer a limitation to PMMA. Due to the reduced subtractive removal, milling times can also be significantly reduced. Because the final milling is only performed in the connected state, the result corresponds to

[0144] REPLACEMENT SHEET (RULE 26) with high accuracy of the digital database, i.e. the virtual three-dimensional model of the dental prosthesis to be manufactured.

[0145] The method according to the invention achieves a high degree of precision fit of the dental prosthesis through direct milling of the final shape. There is no effort involved in bonding individual denture teeth, and no inhomogeneities arise in the dental prosthesis due to a joining process. At the same time, by fully curing the inlay elements or by using particularly hard and strong inlay elements, a particularly abrasion-resistant material can be achieved for at least one denture tooth of the dental prosthesis. By using layered inlay elements, a particularly aesthetically pleasing denture tooth material can also be obtained. With dental prostheses, a natural color transition from gum color to tooth color is achieved in the right places, and no compromises need to be made.A particularly high level of aesthetics can be achieved by using multilayer inlay elements for at least one prosthetic tooth.

[0146] The production from the insert elements, the milling body, from the cured or partially cured fluid polymerizable plastic and with the method according to the invention can be carried out in a manufacturing process of only three or four stages.

[0147] The preformed insert elements can already be shaped to suit, for example, have a standard shape such as a cylinder or bar. The required recesses or cavities in the milling body as the carrier material can either be generated in advance in a separate step or be preformed in a standardized manner. The materials required for this area, e.g. different colors, are inserted into the recesses in the form of individual, matching insert elements. The fastening can be achieved by polymerization or alternatively by gluing. Gluing can be done, for example, using an adhesive that can be reversibly removed. This means that, for example, during later heating, the processed material residues can be removed and replaced with new insert elements. This enables the milling body to be reused multiple times.The insert elements embedded in the milling body as a carrier blank are then machined using a suitable milling machine in CAM.

[0148] In the following, exemplary embodiments of the invention are explained with reference to ten schematically illustrated figures and a flowchart, without, however, limiting the invention. In the following,

[0149] Figure 1: a schematic perspective view of an upper side of a first milling body according to the invention (left) and, to the right, a matching insert element;

[0150] REPLACEMENT BLADE (RULE 26) Figure 2: a schematic perspective view of an upper side of a second milling body according to the invention (left) and, to the right of it, a matching insert element;

[0151] Figure 3: a schematic perspective view of the milling body according to Figure 2 with inserted insert element;

[0152] Figure 4: a schematic perspective view of the milling body according to Figure 3 with attached insert element;

[0153] Figure 5: a schematic perspective view of the milling body according to Figure 4, with two prosthetic teeth machined out of the attached insert element;

[0154] Figure 6: a schematic perspective view of an upper side of a third milling body according to the invention (top) with several recesses and below them several insert elements;

[0155] Figure 7: a schematic perspective transparent view of a lateral side of a fourth milling body according to the invention with inserted insert element and with a cross-sectional view and a position of the dental prosthesis to be produced therewith;

[0156] Figure 8: a schematic view of the top side of the milling body according to Figure 7 after the subtractive machining of the connecting surface and the negative mold for the oral side of the denture base;

[0157] Figure 9: a schematic view of the basal side of the dental prosthesis after subtractive machining from the previously filled and then cured plastic material;

[0158] Figure 10: a schematic view of the occlusal or oral side of the dental prosthesis after subtractive machining from the material of the milling body, the material of the insert element and the previously filled polymerized cured plastic material; and

[0159] Figure 11: the sequence of a method according to the invention for producing a dental prosthesis.

[0160] Figure 1 shows a schematic perspective view of a top side (top in Figure 1) of a first milling body 1 according to the invention and, to the right of it, a matching insert element 7. The milling body 1 preferably has a solid body 2 made of a material that can be milled easily and precisely. For this purpose, the material of the solid body 2 should not be too hard, but at the same time should not crumble or break brittlely during milling. The solid body 2 extends to a bottom side opposite the top side of the milling body 1 (not visible in Figure 1).

[0161] REPLACEMENT LEAF (RULE 26) The material for the insert element 7 can be a fully polymerized, tooth-colored plastic suitable for the production of denture teeth and possessing the necessary abrasion resistance. The material of the insert element 7 should preferably already be biocompatible as it is in the insert element 7 in order to be suitable for use in a patient's oral cavity.

[0162] On the upper side of the milling body 1, a cavity 4 with a flat surface 6 can be arranged, wherein the cavity 4 can be laterally delimited by a circumferential wall 8. The surface 6 is formed (preferably completely) by the solid body 2. The circumferential wall 8 can consist of the material of the solid body 2 or of a different material. In particular, the circumferential wall 8 can be an annular body or a tubular piece that is plugged onto the solid body 2 and firmly connected to it. The connection can be made by gluing. The solid body 2 can be cylindrical in shape. The solid body 2 can have a step on the outer circumference for plugging on an annular body or tubular piece as a circumferential wall 8, onto which step the annular body or tubular piece is plugged flush. The circumferential wall 8 can in particular be a cylindrical tubular piece. The circumferential wall 8 can also be a metal annular body.

[0163] A marking 9 for determining a fill level in the cavity 4 can be arranged on an inner side of the circumferential wall 8 facing the cavity 4 or on an outer side of a circumferential transparent wall 8. However, the marking 9 can also be applied to the circumferential wall 8 during the course of a process for producing a dental prosthesis, for example, by milling it in. Using the marking 9, the fluid, polymerizable plastic (not shown in Figure 1) to be filled into the cavity 4 can be filled to the correct level.

[0164] In the surface 6 of the solid body 2 there is a recess 3 into which the insert element 7 or other insert elements (not shown) can be inserted or inserted.

[0165] At least one holder 10 for securing the milling body 1 in a CAM device can be arranged on at least one outer wall of the milling body 1. The holder 10 can protrude from the outer wall of the milling body 1 as an attached torus with a rectangular cross-sectional area. As an alternative to the holder 10 shown in Figure 1, the holder can also be implemented in a different way, for example, by means of protruding projections or recesses in the side surfaces. The holder 10 serves for fastening in a CAM device (not shown).

[0166] The milling body 1 according to Figure 1 can be used in a method according to the invention as follows. The insert element 7 is inserted or plugged into the recess 3 and, if necessary, is embedded in the recess using an embedding material (such as a fluid

[0167] REPLACEMENT LEAF (RULE 26) polymerizable plastic or a wax that is fluid when heated) in the recess 3. The milling body 1 with the insert element 7 fastened therein is fixed in a subtractive CAM device, such as a computer-controlled multi-axis milling machine, using the holder 10. With the aid of a virtual CAD model of a dental prosthesis to be produced, a surface can be created in the surface 6 and the insert element 7 that corresponds to the connecting surface between the material of the prosthetic teeth and the cured plastic material to be produced from a fluid, polymerizable plastic according to a virtual CAD model of a dental prosthesis. The connecting surfaces between the prosthetic teeth and the prosthetic base can be manufactured exclusively in the insert element 7.In addition, the occlusal or oral surfaces of the surfaces consisting of the cured plastic material can be machined from the solid body 2 as a negative mold using the subtractive CAM device. An offset can be used so that the negative mold is machined somewhat deeper, preferably at least a few tenths of a millimeter deeper, into the solid body 2 than the occlusal or oral surface for the cured plastic material according to the CAD model would require with a direct negative mold. Additionally, the marking 9 can be created on the circumferential wall 8 in this step. The newly created surface in the surface 6 of the solid body 2 and in the insert element 7 can then be cleaned.

[0168] The fluid polymerizable plastic (not shown) can then be poured into the cavity 4 to a level sufficient to allow the part of the dental prosthesis consisting of the cured plastic material (the prosthesis base) to be completely machined from the cured plastic material on the basal side according to the virtual CAD model. The fluid polymerizable plastic can harden under the influence of pressure and temperature, forming the cured plastic material. The intermediate product can then be reattached to the subtractive CAM device, and the dental prosthesis is machined using the CAM device based on the occlusal or oral surfaces and the basal surfaces of the virtual CAD model of the dental prosthesis.The prosthetic teeth of the dental prosthesis then consist of the material of the insert element 7 and the prosthetic base of the dental prosthesis then consists of the cured plastic material.

[0169] Figures 2 to 5 show the sequence of a method according to the invention using a second milling body 11 according to the invention. Figure 2 shows a schematic perspective view of an upper side of the second milling body 11 according to the invention (left) and, to the right of it, a matching insert element 17.

[0170] REPLACEMENT BLADE (RULE 26) The milling body 11 has a solid body 12 made of a material that can be easily and precisely milled. For this purpose, the material of the solid body 12 should not be too hard, but at the same time should not crumble or break brittlely during milling. The solid body 12 extends to a bottom side opposite the top side of the milling body 11 (not visible in Figures 2 to 5).

[0171] The material for the insert element 17 can be a fully polymerized, tooth-colored plastic suitable for the production of prosthetic teeth and possessing the necessary abrasion resistance. The material of the insert element 17 should preferably already be biocompatible as it is in the insert element 17 in order to be suitable for use in a patient's oral cavity.

[0172] A surface 16 is arranged on the upper side of the milling body 11. A recess 13 with a geometric shape matching the insert element 17 can be arranged in the surface 16 of the solid body 12. The recess 13 can be defined by side walls 14 and a base 15. The insert element 17 can have side walls 18 of the insert element 17 that match the side walls 14 of the recess 13.

[0173] At least one holder 20 for securing the milling body 11 in a CAM device can be arranged on at least one outer wall of the milling body 11. The holder 20 can protrude from the outer wall of the milling body 11 as a mounted torus with a rectangular cross-sectional area. As an alternative to the holder 20 shown in Figures 2 to 5, the holder can also be implemented in a different way, for example, by means of protruding projections or recesses in the side surfaces. The holder 20 serves for fastening in a CAM device (not shown).

[0174] A pipe section (not shown) can be fitted around the surface 16 as an annular wall. For this purpose, the pipe section can be fitted onto the milling body 11 in a fitting or press-fit manner, with a circumferential holder 20 serving as a stop. The connection can be made by gluing. Once the pipe section is fitted, a cavity with the surface 16 is laterally delimited by a circumferential wall. This can be done after the milling body 11 has been machined with a CAM device and before a fluid-polymerizable plastic is filled onto the machined surface 16 and the machined insert element 17. The surface 16 is formed (preferably completely) by the solid body 12. The solid body 12 can be cylindrical.

[0175] The insert element 17 can be inserted into the recess 13. This situation is shown in Figure 3. A gap remains between the side walls 14 of the recess 13 and the side walls 18 of the insert element 17.

[0176] The insert element 17 can be fixed in the recess 13. This situation is shown in Figure 4. The gap between the insert element 17 and the recess can be

[0177] REPLACEMENT LEAF (RULE 26) Purpose by filling an investment material 22. The investment material 22 can be a wax, an adhesive, or a fluid, polymerizable plastic. The investment material 22 fixes and secures the insert element 17 in the recess 13 of the milling body 11. The investment material 22 can also be arranged between the bottom 15 of the recess 13 and the insert element 17. It is also possible to fill the investment material 22 before inserting the insert element 17 into the recess 13.

[0178] The milling body 11 with the insert element 17 fastened in the recess 13 can then be fixed in a CAM device. Using a virtual three-dimensional model of prosthetic teeth of a dental prosthesis to be produced, these can be created in the material of the insert element 17. This situation is shown in Figure 5, where two prosthetic teeth 26 have already been largely machined out of the attached insert element 17. The prosthetic teeth 26 have a basal connecting surface 24, which is intended for connection to a prosthetic base of the dental prosthesis. By subsequent machining from the other side of the milling body 11, the prosthetic teeth 26 can be completely machined out and then (if necessary after final machining) glued into a prosthetic base (not shown) to produce the finished dental prosthesis.Alternatively, according to the invention, a method as described in Figure 1 can also be used, and the denture base can be produced directly on the connecting surface 24. The oral surface of the denture base can also be preformed as a negative mold in the material of the solid body 12, in the embedding material 22, and in the material of the insert element 17, analogously to the method described in Figure 1.

[0179] Figure 6 shows a schematic perspective view of a top side (top in Figure 1) of a third milling body 31 according to the invention and, beneath it, several insert elements 37. The milling body 31 preferably has a solid body 32 made of a material that can be milled easily and precisely. For this purpose, the material of the solid body 32 should not be too hard, but at the same time should not crumble or break brittlely during milling. The solid body 32 extends to a bottom side opposite the top side of the milling body 31 (not visible in Figure 6).

[0180] Differently colored and / or hard, fully polymerized, tooth-colored plastics suitable for the production of prosthetic teeth and possessing the necessary abrasion resistance can be used as the material for the insert elements 37. The materials for the insert elements 37 should preferably already be biocompatible as they are in the insert element 37 in order to be suitable for use in a patient's oral cavity.

[0181] REPLACEMENT BLADE (RULE 26) A flat surface 36 can be arranged on the top side of the milling body 31. The surface 36 is formed (preferably completely) by the solid body 32. The solid body 32 can be cylindrical.

[0182] Arranged in the surface 36 of the solid body 32 are a plurality of recesses 33 into which the insert elements 37 can be inserted or inserted individually or in groups. The recesses 33 can be delimited by side walls 34 and a base 35. The insert elements 37 can have side walls 38 of the insert element 37 that match the side walls 34 of the recess 33. The insert elements 37 can be inserted into the recesses 33 individually or in groups, either fitting or not fitting. Gaps can remain between the side walls 34 of the recesses 33 and the side walls 38 of the insert elements 37, or the insert elements 37 can be inserted into the recesses 33 with a press fit. If a gap or free space remains, it can be partially or completely filled with an embedding material (not shown in Figure 6). The embedding material can be a wax, an adhesive, or a fluid-polymerizable plastic.The embedding material can also be arranged between the bottom 35 of the recesses 33 and the insert elements 37. It is also possible to fill the embedding material into the recesses 33 before inserting the insert elements 37.

[0183] At least one holder 40 for securing the milling body 31 in a CAM device can be arranged on at least one outer wall of the milling body 31. The holder 40 can protrude from the outer wall of the milling body 31 as a mounted torus with a rectangular cross-sectional area. As an alternative to the holder 40 shown in Figure 6, the holder can also be implemented in a different way, for example, by means of protruding projections or recesses in the side surfaces. The holder 10 serves for fastening in a CAM device (not shown).

[0184] The milling body 31 according to Figure 6 can be used in a method according to the invention as follows. Several of the insert elements 37 are computationally selected using an insert element selection module to match a virtual three-dimensional model of prosthetic teeth of a dental prosthesis to be manufactured. They are then inserted or inserted into the matching recesses 33 of the milling body 31 and, if necessary, secured in the recesses 33 with the aid of an embedding material (such as wax). The milling body 31 with matching recesses 33 can be computationally selected beforehand using a milling body provision module, based on the virtual three-dimensional model of the prosthetic teeth or based on a virtual three-dimensional model of the dental prosthesis. The selection is made to match the prosthetic teeth and their arrangement in the dental prosthesis according to the virtual three-dimensional model of the dental prosthesis.

[0185] REPLACEMENT BLADE (RULE 26) The milling body 31 with the insert elements 37 attached thereto is fixed in a subtractive CAM device, such as a computer-controlled multi-axis milling machine, using the holder 40. Using the virtual three-dimensional model of the dental prosthesis to be produced, a surface is created as a negative mold in the surface 36 and the insert elements 37. This surface corresponds to the connection surface between the material of the prosthetic teeth and the cured plastic material to be produced from the fluid, polymerizable plastic, according to a virtual three-dimensional model of the dental prosthesis. The connection surfaces between the prosthetic teeth and the prosthetic base are manufactured exclusively in the insert elements 37.In addition, the occlusal or oral surfaces of the surfaces consisting of the cured plastic material are machined using the subtractive CAM device as a negative mold from the solid body 32 and, if applicable, the embedding material. An offset can be used so that the negative mold is machined somewhat deeper, preferably at least a few tenths of a millimeter deeper, into the solid body 32 than the occlusal or oral surface for the cured plastic material would require with a direct negative mold according to the virtual three-dimensional model of the dental prosthesis. The newly created surface in the surface 36 of the solid body 32 and in the insert elements 37 can then be cleaned.

[0186] A fluid, polymerizable resin (not shown) can then be applied to the subtractively produced surface to a height sufficient to allow the portion of the dental prosthesis consisting of the cured resin material to be completely carved out of the cured resin material on the basal side, in accordance with the virtual three-dimensional model. The fluid, polymerizable resin can harden under the influence of pressure and temperature, forming a hardened resin material from which a denture base can be fabricated. The intermediate product can then, if necessary, be reattached to the subtractive CAM device, and the dental prosthesis is carved out using the CAM device based on the occlusal or oral surfaces and the basal surfaces of the virtual three-dimensional model of the dental prosthesis.The prosthetic teeth of the dental prosthesis then consist of the material of the insert elements 37 and the prosthetic base of the dental prosthesis then consists of the cured plastic material.

[0187] With Figures 7 to 10, the sequence of a method according to the invention using a fourth milling body 51 according to the invention and a virtual CAD model of a dental prosthesis 82 is explained below by way of example.

[0188] REPLACEMENT LEAF (RULE 26) Figure 7 shows a schematic perspective transparent view of a lateral side of the milling body 51 with an insert element 57 inserted into a recess 53 in a surface 56 of the milling body 52. ​​The illustration shows a cross-sectional view and a desired position of the dental prosthesis 82 to be produced (in the central area of ​​Figure 7). Figure 8 shows a schematic view of the upper side of the milling body 51 according to Figure 7 after the subtractive machining of the connecting surface and the negative mold 81 for the oral side of the prosthesis base 72, and Figure 9 shows a schematic view of the basal side of the dental prosthesis 82 after the subtractive machining from the previously filled and then cured plastic material.Finally, Figure 10 shows a schematic view of the occlusal or oral side of the dental prosthesis 82 after subtractive machining from the material of the milling body 51, the material of the insert element 57 and the previously filled polymerized cured plastic material.

[0189] The virtual CAD model of the dental prosthesis 82 is shown in Figure 7 in the desired position in the milling body 51, above the milling body 51 or into the milling body 51. As with some of the following figures, this serves to enable one to imagine how the dental prosthesis 82 to be manufactured lies in the milling body 51 before it has been machined out. This illustrates the sequence of the CAD processes. The prosthetic teeth 66 are positioned in the milling body 51 such that they are completely contained in the area of ​​the insert elements 57 made of the material of the insert elements 57. For this purpose, milling bodies 51 with suitable recesses 53 for inserting or plugging in the insert elements 57 can be selected, or suitable recesses 53 can be created in the milling bodies 51. In addition, suitable insert elements 57 can be selected and arranged in the appropriate recesses 53 of the milling body 51.In the present embodiment, a suitable insert element 57 was press-fitted into the recess 53, so that pressure is exerted by the side walls 54 of the recess 54 and the side walls 55 of the insert element 57, thereby securing the insert element 57 in the recess 53 of the milling body 51. However, the insert element 57 can also be embedded in the recess 53 with an embedding material (not shown) in order to secure the insert element 57 in the milling body 51.

[0190] First, the oral surface 69 of the denture base 72 and the connecting surface between the denture teeth 66 and the denture base 72 are created using a subtractive CAM device, such as a computer-controlled multi-axis milling machine, based on the virtual CAD model in the solid body 52 of the milling body 51 and in the inserted insert element 57. For this purpose, with the aid of the virtual CAD model, a surface is created in the surface 56 and the insert element 57, which corresponds to the connecting surface between the material of the insert element 57 and the material of the solid body 52 on the one hand and the

[0191] REPLACEMENT LEAF (RULE 26) the cured plastic material to be produced as a fluid polymerizable plastic according to the virtual CAD model, on the other hand. The oral surfaces 69 of the surfaces later consisting of the cured plastic material are machined from the solid body 52 using the subtractive CAM device as a negative mold 81. An offset can be used so that the negative mold 81 is machined at least a few tenths of a millimeter deeper into the solid body 52 than the oral surface 69 would actually require for the cured plastic material. The negative mold 81 thus serves as a casting mold for producing the oral side of the prosthesis base 72. The surface thus produced can be clearly seen in the schematic view of the upper side of the milling body 51 machined in this way, according to Figure 8.The connecting surface between the prosthetic teeth 66 and the prosthetic base 72 in Figure 8 corresponds to the surface formed by the insert element 57, which is part of the prosthetic teeth 66 and which is already identified in Figure 8 as prosthetic teeth 66. In this connecting surface of the prosthetic teeth 66, there are recesses 67 into which the fluid polymerizable plastic is poured to create a more stable connection.

[0192] Additionally, a marking can be created on a circumferential wall 58. The newly created surface can then be cleaned. A cavity 54 shown in Figure 8 (analogous to Figure 1) can then be filled or plugged with the fluid polymerizable plastic up to the marking. The fluid polymerizable plastic can then be cured (preferably under pressure and / or at an elevated temperature compared to room temperature) (preferably for 30 to 60 minutes) to form the cured plastic material from which the prosthesis base 72 is manufactured.

[0193] After curing, the resulting intermediate product is clamped back into the subtractive CAM device (the multi-axis milling machine), and the occlusal surface 68 and the oral surface 69 of the dental prosthesis 82 (this time without the offset), as well as the basal surface 70 of the dental prosthesis 82, are subtractively machined from the intermediate product according to the virtual CAD model of the dental prosthesis 82. Figure 9 shows a schematic view of the basal side 70 of the dental prosthesis 82 after subtractive machining from the polymerized, cured plastic material, before the machining of the occlusal surface 68 and the oral surface 69 was completed and the dental prosthesis 82 was detached from the remaining milling body 51. Figure 10 finally shows the dental prosthesis 82 detached from the circumferential wall 58.For final completion, cleaning, polishing and / or surface treatment of the dental prosthesis 82 can be carried out as post-processing.

[0194] REPLACEMENT SHEET (RULE 26) An exemplary process is explained below using the intermediate and final products shown in Figures 2 to 5. The sequence of the exemplary process is shown as a flowchart in Figure 11.

[0195] In a first work step 100, a virtual three-dimensional model of a dental prosthesis to be created is calculated using CAD. The virtual three-dimensional model of the dental prosthesis to be created may, but need not, have a support structure.

[0196] In a subsequent second work step 101, the virtual three-dimensional model of the dental prosthesis is calculated, for example by file splitting, into a tooth portion as a virtual three-dimensional model of at least one prosthetic tooth 26 and a prosthetic base portion as a virtual three-dimensional model of the prosthetic base. Additionally, a virtual three-dimensional model of the support structure can also be calculated if the virtual three-dimensional model of the dental prosthesis has such a support structure.

[0197] In an optional third work step 102, a physical support structure can be generated based on the virtual three-dimensional model of the support structure, or the physical support structure can be manufactured analogously and subsequently scanned to generate a virtual three-dimensional model of the support structure, wherein the surface of the virtual three-dimensional model of the at least one prosthetic tooth 26 is modified with the virtual three-dimensional model of the support structure. In the same way, the virtual three-dimensional model of the prosthesis base can also be adapted with the virtual three-dimensional model of the support structure. This third work step 102 only occurs if the dental prosthesis to be created is to have a support structure.

[0198] In a fourth work step 103, a connection surface between the at least one prosthetic tooth 26 and the prosthetic base or between the at least one prosthetic tooth 26 and a support structure for positioning the support structure on the one hand and the prosthetic base and the support structure of the dental prosthesis on the other hand is calculated in the virtual three-dimensional model. In addition, a calculation of the surface to be produced in a milling body 11, comprising the connection surface (optionally with the support structure and optionally with a separate mounting structure for the support structure, for example in the form of protruding webs, for attaching the support structure), is carried out using CAD methods. The position and orientation of the at least one prosthetic tooth in the milling body are determined.

[0199] In a fifth work step 104, an insert element 17 is selected or several insert elements 17 are selected, the shape and volume of which, when suitably positioned, are capable of completely accommodating the prosthetic teeth 26,

[0200] REPLACEMENT BLADE (RULE 26) optionally with an offset. From the available insert elements 17, those insert elements 17 can be selected for which the lowest material loss of the insert elements 17 is to be expected due to their shape and volume. An insert element selection module of an inventive device for implementing a method according to the invention can be used for this selection. This can be achieved by suitable computer programming.

[0201] In a sixth work step 105, a milling body 11 matching the at least one selected insert element 17 with a matching recess 13 or with matching recesses 33 (see Figure 6) is selected from a database. For this purpose, the database stores a plurality of existing milling bodies 1, 11, 31, 51 with an identifier and the position, orientation, and shape of the at least one recess 3, 13, 33, 53 in the respective milling body 1, 11, 31, 51. In particular, the position and orientation of the insert elements 17 relative to one another can also be decisive in the selection. If no milling body 11, 31 with matching recesses 13, 33 is available, such a milling body 11 can be produced by milling from a milling body without recess(es) or with recess(es) that are too small.For the selection or production of the suitable milling body 11, 31, a milling body provision module of a device according to the invention for implementing a method according to the invention can be used. This can also be achieved by suitable computer programming. If a new milling body with at least one recess is newly produced, the shape and position of the at least one recess can be stored in the database together with an identifier of the milling body, so that this new milling body is available for future selections.

[0202] In a seventh work step 106, the selected at least one insert element 17 is fastened in the at least one recess 13 of the selected milling body 11 by inserting the selected at least one insert element 17 into the at least one recess 13 of the selected milling body 11 and fastening it with an embedding material 22 (for example by gluing or casting) or by inserting the selected at least one insert element 17 into the at least one recess 13 of the selected milling body 11 in a press fit.

[0203] In an eighth work step 107, the selected milling body 11 with at least one insert element 17 fastened therein is fastened in a CAM device.

[0204] Based on the virtual models created in the second and fourth and possibly also in the third work step, in a ninth work step 108 the surface to be produced is created in a milling body surface 16 in the milling body 11 and in the insert element 17 and possibly in the embedding material 22 using a subtractive CAM process

[0205] REPLACEMENT BLADE (RULE 26) is manufactured. The connecting surface or at least one prosthetic tooth is created using the CAM process. This may result in a cavity in the surface 16 of the milling body 11.

[0206] In an optional tenth work step 109, the support structure produced analogously or using CAM processes can be applied to the machined surface of the milling body 17 or fastened there.

[0207] In a preferred eleventh step 110, a fluid polymerizable plastic is filled or plugged into the cavity.

[0208] In a preferred twelfth work step 111, the fluid polymerizable plastic is cured or partially cured, thus firmly bonding the processed at least one insert element to the polymerizable plastic and optionally to the support structure.

[0209] In a preferred thirteenth work step 112, the dental prosthesis is subtractively machined from the composite produced in the twelfth work step 111.

[0210] Optionally, in a fourteenth step 113, the dental prosthesis can be post-cured or finally hardened.

[0211] In an optional fifteenth work step 114, the dental prosthesis can be finished, for example by surface treatment and / or polishing of the dental prosthesis.

[0212] The preferred steps 110, 111, 112 (the eleventh, twelfth and thirteenth steps) are only carried out if a dental prosthesis is to be made directly from the prosthetic teeth.

[0213] The features of the invention disclosed in the foregoing description, as well as in the claims, figures and embodiments, may be essential both individually and in any combination for the realization of the invention in its various embodiments.

[0214] List of reference symbols

[0215] 1 , 11 , 31 , 51 milling bodies

[0216] 2, 12, 32, 52 full body

[0217] 3, 13, 33, 53 Deepening

[0218] 4, 54 cavity

[0219] 6, 16, 36, 56 surface

[0220] 7, 17, 37, 57 insert element

[0221] REPLACEMENT BLADE (RULE 26) 8, 58 Wall

[0222] mark

[0223] 10, 20, 40, 60 bracket

[0224] 14, 34, 54 Side wall of the recess

[0225] 15, 35 Bottom of the depression

[0226] 18, 38, 55 Side wall of the insert element

[0227] 22 Embedding material

[0228] 24 Connection surface

[0229] 26, 66 prosthetic tooth

[0230] 59 Bottom

[0231] 61 Top

[0232] 67 recess

[0233] 68 Occlusal surface

[0234] 69 Oral surface

[0235] 70 Basal surface

[0236] 71 Top

[0237] 72 denture base

[0238] 81 Negative form

[0239] 82 dental prosthesis

[0240] 100 work steps: Calculating a virtual 3D model of a dental prosthesis

[0241] 101 Work step: Calculation of virtual 3D models of denture teeth and denture base, if necessary with support structure

[0242] 102 Optional work step: Manufacture of a support structure and, if necessary, create a virtual 3D model of the support structure

[0243] 103 Work step: Calculation of the surface to be produced in a milling body, including the connection surface, using CAD methods

[0244] 104 Work step: Select at least one insert element that matches the virtual 3D model

[0245] 105 Work step: Selecting a milling body suitable for the at least one selected insert element with a suitable at least one recess

[0246] 106 Work step: Fastening the at least one insert element in the at least one recess of the milling body

[0247] 107 Work step: Fixing the milling body in a CAM fixture

[0248] 108 Work step: Production of the connecting surface and a cavity in the milling body and the at least one insert element using subtractive CAM process

[0249] 109 Optional work step: Attaching or fastening the support structure to the machined milling body

[0250] REPLACEMENT SHEET (RULE 26) Preferred work step: Filling fluid polymerizable resin into the cavity in the milling body Preferred work step: Curing the fluid polymerizable resin Preferred work step: Subtractive machining of the dental prosthesis using CAM processes Optional work step: Post-curing or final curing of the dental prosthesis Optional work step: Final machining of the dental prosthesis

[0251] REPLACEMENT SHEET (RULE 26)

Claims

Patent claims 1. A method for producing a dental prosthesis (82), wherein the dental prosthesis (82) comprises at least one prosthetic tooth (26, 66) and a prosthetic base (72), wherein the prosthetic base (72) comprises a gum-colored plastic, and wherein the at least one prosthetic tooth (26, 66) and the prosthetic base (72) are firmly connected to one another in the method, wherein the at least one prosthetic tooth (26, 66) is produced using a subtractive CAM method in accordance with at least one virtual three-dimensional model of the at least one prosthetic tooth (26, 66), wherein the method comprises the following chronological steps: A) generating at least one virtual three-dimensional model of the at least one prosthetic tooth (26, 66) using a CAD method in accordance with a virtual three-dimensional model of the dental prosthesis (82); B) selecting at least one insert element (7, 17, 37, 57) depending on the at least one virtual three-dimensional model of the at least one prosthetic tooth (26, 66), wherein the selection is made such that the volume of the at least one prosthetic tooth (26, 66) can be completely accommodated in the volume of the at least one insert element (7, 17, 37, 57); C1) selecting a milling body (1, 11, 31, 51) with at least one recess (3, 13, 33, 53) matching the at least one insert element (7, 17, 37, 57), so that the at least one insert element (7, 17, 37, 57) can be inserted into the at least one recess (3, 13, 33, 53) in a fit, or C2) producing at least one recess (3, 13, 33, 53) in a milling body (1, 11, 31, 51), wherein the at least one recess (3, 13, 33, 53) is produced to fit the at least one insert element (7, 17, 37, 57), so that the at least one insert element (7, 17, 37, 57) can be inserted into the at least one recess (3, 13, 33, 53) in a fit; D) inserting or plugging the at least one insert element (7, 17, 37, 57) into the at least one recess (3, 13, 33, 53) in the milling body (1, 11, 31, 51), wherein individual ones of the at least one insert element(s) (7, 17, 37, 57) or several of the at least one insert element(s) (7, 17, 37, 57) placed together have the same geometric shape as the at least one recess (3, 13, 33, 53) and are inserted individually or placed together in a fitting manner into the respectively matching at least one recess (3, 13, 33, 53); E) fixing the at least one insert element (7, 17, 37, 57) in the at least one recess (3, 13, 33, 53) by embedding, polymerizing or gluing the at least one insert element (7, 17, 37, 57) in an embedding material (22) within the at least one recess (3, 13, 33, 53) or by press fitting the at least one insert element (7, 17, 37, 57) in the at least one recess (3, 13, 33, 53); F) fixing the milling body (1, 11, 31, 51) in a CAM device; and G) Working out the at least one prosthetic tooth (26, 66) with the CAM device according to the at least one virtual three-dimensional model of the at least one prosthetic tooth (26, 66) from the at least one insert element (7, 17, 37, 57).

2. Method according to claim 1, characterized in that in step G) when working out the at least one prosthetic tooth (26, 66) the entire surface of the at least one insert element (7, 17, 37, 57) exposed in the milling body (1, 11, 31, 51) is machined.

3. Method according to claim 1, characterized in that in step G) when working out the at least one prosthetic tooth (26, 66) the entire surface of the at least one insert element (7, 17, 37, 57) is machined down to a holding geometry.

4. Method according to one of the preceding claims, characterized in that in step A) the virtual three-dimensional model of the dental prosthesis (82) is created by CAD construction and adaptation to a virtual three-dimensional model of the oral cavity situation of a patient.

5. Method according to one of the preceding claims, characterized in that in step B) the selection of the at least one insert element (7, 17, 37, 57) is additionally carried out depending on the function and / or the position of the prosthetic tooth (26, 66) in the dental prosthesis (82).

6. Method according to claim 5, characterized in that the selection of the at least one insert element (7, 17, 37, 57) is carried out with regard to the color, the transparency and the mechanical physical properties of the at least one insert element (7, 17, 37, 57).

7. Method according to one of the preceding claims, characterized in that in step B) the selection of the at least one insert element (7, 17, 37, 57) is additionally carried out depending on an individually determined colour selection and / or colour selection computer-assisted by colour matching.

8. Method according to one of the preceding claims, characterized in that after step C2) an electronic storage of the shape of the in step C2) produced at least one depression (3, 13, 33, 53) together with an identifier of the milling body (1, 11, 31, 51) takes place, so that in subsequent methods the milling body (1, 11, 31, 51) with the in step C2) produced depression (3, 13, 33, 53) in the context of a step C1) is available as a selectable milling body (1, 11, 31, 51).

9. Method according to one of the preceding claims, characterized in that the embedding material (22) is a wax or an adhesive or a polymerizable plastic, which is used in liquid form in step E) for fastening the at least one insert element (7, 17, 37, 57).

10. The method according to claim 9, characterized in that the wax in step H) is removed by scalding or melting or chemically or the polymerizable plastic or the adhesive is chemically dissolved.

11. Method according to one of the preceding claims, characterized in that the at least one insert element (7, 17, 37, 57) has a symmetrical geometric shape with at least one mirror symmetry plane and / or at least one rotational symmetry axis.

12. Method according to one of the preceding claims, characterized in that the at least one insert element (7, 17, 37, 57) has a cuboid shape, a cylindrical shape, a cylindrical shape with a triangular base, a cylindrical shape with a triangular base with rounded edges of the triangular base, a bar shape or a trapezoidal shape.

13. Method according to one of the preceding claims, characterized in that after step G) the at least one prosthetic tooth (26, 66) is separated from the milling body (1, 11, 31, 51) and the remains of the at least one insert element (7, 17, 37, 57).

14. Method according to claim 13, characterized in that the remains of the at least one insert element (7, 17, 37, 57) are removed from the at least one recess (3, 13, 33, 53).

15. Method according to claim 14, characterized in that the embedding material (22) is also removed from the at least one recess (3, 13, 33, 53).

16. Method according to one of the preceding claims, characterized in that in step B) each prosthetic tooth (26, 66) is assigned its own separate insert element (7, 17, 37, 57) or several groups of adjacent prosthetic teeth (26, 66) are each assigned its own separate insert element (7, 17, 37, 57).

17. The method according to claim 16, characterized in that the groups of adjacent prosthetic teeth (26, 66) are grouped into groups of molar prosthetic teeth and incisor prosthetic teeth and canine prosthetic teeth or of molar prosthetic teeth, incisor prosthetic teeth and canine prosthetic teeth.

18. Method according to one of the preceding claims, characterized in that the method for implementing step G) comprises the following steps: H) producing a connecting surface (24) between the at least one prosthetic tooth (26, 66) and the prosthesis base (72) in the at least one insert element (7, 17, 37, 57) and producing a negative mold (81) of at least a partial area of ​​the oral surface (69) of the prosthesis base (72) of the dental prosthesis (82) to be produced in a surface (6, 16, 36, 56) of the milling body (1, 11, 31, 51) and in the at least one insert element (7, 17, 37, 57), and if present in the embedding material (22), with the aid of a subtractive CAM method in accordance with the virtual three-dimensional model of the dental prosthesis (82), wherein the connecting surface (24) and the negative mold (81) are adjacent to one another; I) filling at least one fluid polymerizable plastic into the connecting surface (24) and into the negative mold (81) and into the volume removed in step H) and curing the at least one fluid polymerizable plastic, wherein the curing of the at least one fluid polymerizable plastic produces a cured plastic material which is firmly and flush-connected to the material of the insert element (7, 17, 37, 57); J) Subtractive machining of the cured plastic material from the direction of an upper side of the milling body (1, 11, 31, 51) containing the at least one depression (3, 13, 33, 53) using a CAM method in accordance with a basal surface (70) of the virtual model of the dental prosthesis (82) and subtractive machining of the milling body (1, 11, 31, 51) from the direction of an underside of the milling body (1, 11, 31, 51) opposite the upper side of the milling body (1, 11, 31, 51) using a CAM method in accordance with an occlusal surface (68) of the virtual model of the dental prosthesis (82) or in accordance with an occlusal surface (68) and an oral surface (69) of the virtual model of the dental prosthesis (82), so that the dental prosthesis (82) is subtractively machined from the cured plastic material and the material of the at least one insert element (7, 17, 37, 57) connected thereto.

19. The method according to claim 18, characterized in that the negative mold (81) of at least the partial area of ​​the oral surface (69) to be produced of the prosthesis base (72) of the dental prosthesis (82), which is produced in step H) in the surface (6, 16, 36, 56) of the milling body (1, 11, 31, 51) and in the at least one insert element (7, 17, 37, 57), and if present in the embedding material (22), is produced with an offset, wherein the offset enlarges the volume of the virtual model of the dental prosthesis (82).

20. Method according to one of claims 18 or 19, characterized in that in step I) at least one of the at least one fluid polymerizable plastics wets the entire surface of at least the surfaces produced in step H) in the at least one insert element (7, 17, 37, 57) during filling.

21. Method according to one of the preceding claims, characterized in that the dental prosthesis (82) has a support structure, wherein the support structure is firmly connected to the prosthesis base (72) or to the prosthesis base (72) and the at least one prosthetic tooth (26, 66), wherein the support structure is provided for fastening the dental prosthesis (82) in the oral cavity of a patient, wherein the at least one prosthetic tooth (26, 66) and the prosthesis base (72) and the support structure are firmly connected to one another in the method.

22. Modular milling body system for producing a dental prosthesis (82), wherein the modular milling body system comprises at least one milling body (1, 11, 31, 51) and a plurality of insert elements (7, 17, 37, 57), wherein at least one recess (3, 13, 33, 53) is provided on one side of the milling body (1, 11, 31, 51), wherein the at least one recess (3, 13, 33, 53) has a geometric shape and the at least one recess (3, 13, 33, 53) is formed to receive at least one of the insert elements (7, 17, 37, 57) in a fit, wherein the insert elements (7, 17, 37, 57), individually or placed against one another, have the same geometric shape as the at least one recess (3, 13, 33, 53).

23. Modular milling body system according to claim 22, characterized in that the insert elements (7, 17, 37, 57), individually or placed against one another, have the same geometric shape but are smaller than the matching at least one recess (3, 13, 33, 53), so that when one insert element (7, 17, 37, 57) or several insert elements (7, 17, 37, 57) placed against one another are inserted into the matching at least one recess (3, 13, 33, 53), a uniform gap remains between the at least one insert element (7, 17, 37, 57) inserted into the at least one recess (3, 13, 33, 53) and an inner circumferential side wall of the recess (3, 13, 33, 53), wherein the gap size of the gap is preferably a maximum of 1 mm, particularly preferably at least 1 pm and a maximum of 1 mm, most preferably at least 10 pm and 100 pm.

24. Modular milling body system according to claim 22 or 23, characterized in that the insert elements (7, 17, 37, 57) consist of at least one material for the production of prosthetic teeth, preferably at least two of the insert elements (7, 17, 37, 57) consist of at least two different materials for the production of prosthetic teeth.

25. Modular milling body system according to one of claims 22 to 24, characterized in that the insert elements (7, 17, 37, 57) have different sizes, in particular different heights, shape proportions and / or weights, and / or the insert elements (7, 17, 37, 57) have different colors and / or transparency, in particular different tooth-colored colors and / or transparency.

26. Modular milling body system according to one of claims 22 to 25, characterized in that the insert elements (7, 17, 37, 57) have a greater hardness than the material of the at least one milling body (1, 11, 31, 51) in which the at least one recess (3, 13, 33, 53) is formed.

27. Modular milling body system according to one of claims 22 to 26, characterized in that the modular milling body system has at least one embedding material (22), in particular a wax, a polymerizable plastic and / or an adhesive or has a cartridge for producing a fluid polymerizable plastic and / or a fluid adhesive as the embedding material (22), with which the insert elements (7, 17, 37, 57) in the at least one recess (3, 13, 33, 53) of the at least one milling body (1, 11, 31, 51).

28. Modular milling body system according to one of claims 22 to 27, characterized in that on an upper side of the at least one milling body (1, 11, 31, 51) a cavity (4, 54) is arranged for receiving a fluid polymerizable plastic, wherein the cavity (4, 54) has a surface (6, 16, 36, 56) as a base, wherein the at least one depression (3, 13, 33, 53) is arranged in the surface (6, 16, 36, 56), and the cavity (4, 54) is delimited laterally by a circumferential wall (8, 58) starting from the edge of the surface (6, 16, 36, 56), wherein the circumferential wall (8, 58) is annular, wherein preferably the circumferential wall (8, 58) has a wall thickness of at most 20 mm, particularly preferably of at most 10 mm, very particularly preferably of at most 5 mm, and / or the circumferential wall (8, 58) is at least 5 mm high, particularly preferably at least 15 mm high.

29. Modular milling body system according to one of claims 22 to 28, characterized in that the side of the at least one milling body (1, 11, 31, 51) in which the at least one recess (3, 13, 33, 53) is arranged is flat and / or the at least one milling body (1, 11, 31, 51) is a round blank with a cylindrical outer circumference and / or the at least one milling body (1, 11, 31, 51) has on its outer side a holder (10, 20, 40, 60) for fastening the at least one milling body (1, 11, 31, 51) to a suitable counter holder of a CAM device.

30. Modular milling body system according to one of claims 22 to 29, characterized in that the modular milling body system is suitable and intended for implementing a method according to one of claims 1 to 21.

31. Device for implementing a method according to one of claims 1 to 21, characterized in that the device has an insert element selection module and a milling body provision module, wherein the insert element selection module is designed such that the at least one insert element (7, 17, 37, 57) can be selected as a function of the at least one virtual three-dimensional model of the at least one prosthetic tooth (26, 66), wherein the selection is made such that the volume of at least one prosthetic tooth (26, 66) of a dental prosthesis (82) can be completely accommodated in the volume of the at least one insert element (7, 17, 37, 57), and wherein the milling body provision module is designed such that the milling body (1, 11, 31, 51) can be provided with at least one insert element (7, 17, 37, 57) matching at least one recess (3, 13, 33, 53) can be selected, so that the at least one selected insert element (7,17, 37, 57) can be inserted into the at least one recess (3, 13, 33, 53) in a fit, and / or the milling body provision module is designed such that a CAD model for at least one recess (3, 13, 33, 53) in a milling body (1, 11, 31, 51) can be calculated to match the at least one insert element (7, 17, 37, 57), so that the at least one selected insert element (7, 17, 37, 57) can be inserted into the at least one recess (3, 13, 33, 53) in a fit.

Images