Material consumption-optimized production of denture teeth

Abstract

The invention relates to a method for manufacturing a prosthetic tooth according to a virtual three-dimensional model comprising the following steps: A) Creating the model using a CAD method according to a virtual three-dimensional model of a dental prosthesis; B) Selection of an insert element (7) depending on the model of the prosthetic tooth; C) Selecting a milling body (1) with a suitable recess (3) or creating a suitable recess (3) in a milling body (1); D) Inserting or plugging the insert element (7) into the recess (3), wherein the insert element (7) or several insert elements (7) placed next to each other together have the same geometric shape as the recess (3); E) Securing the insert element (7) in the recess (3); F) Mounting the milling body (1) in a CAM fixture; and G) Extraction of the prosthetic tooth using the CAM device according to the model from at least one insert element (7). The invention also relates to a method for manufacturing a dental prosthesis using this method and a device for implementing such a method.

Description

[0001] The invention relates to a method for manufacturing a dental prosthesis, wherein the dental prosthesis comprises at least one prosthetic tooth and a prosthetic base, the prosthetic base being made of 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, and wherein the at least one prosthetic tooth is manufactured using a subtractive CAM method according to at least one virtual three-dimensional model of the at least one prosthetic tooth. Furthermore, a modular milling body system for manufacturing at least one prosthetic tooth or a dental prosthesis with at least one prosthetic tooth and a device for implementing the aforementioned method are disclosed.

[0002] Dental prostheses, also known as dental prosthetic replacements, comprise a denture base and one or more denture teeth and serve to replace remaining teeth. In addition to the tooth-colored denture teeth and the gum-colored denture base, a supporting structure may be present to provide support or retention, or as a load-bearing component for the functional elements. Traditionally, for example, metal frameworks are used, to which denture acrylic and denture teeth are attached using a similar process.

[0003] Alongside traditional craftsmanship, digital manufacturing methods are gaining increasing importance in dentistry. Dental prostheses, such as partial and complete dentures, denture teeth, crowns, bridges, and occlusal splints, have been manufactured subtractively using CAD / CAM technologies in milling processes for several years (CAM - Computer-Aided Manufacturing, CAD - Computer-Aided Design). CAD / CAM processes are also increasingly used in the fabrication and design of denture teeth and partial and complete dentures with a denture base for resting on the gingiva and supporting or affixing denture teeth.

[0004] Digital processes allow the production of denture teeth, denture bases, support structures, and other dental components using subtractive manufacturing methods, such as milling, or additive manufacturing methods, such as sintering. Tooth-colored denture teeth or gum-colored elements can also be digitally prefabricated.

[0005] Pre-shaped blanks are typically used as milling tools for the production of denture teeth. These can be discs or smaller parts such as milling blocks. All these blanks have in common that they consist of a single material base with identical properties throughout, such as the same color and material composition.

[0006] 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 single crowns and round blanks, whereby the round blanks are fixed in holding systems and machined on both sides using a multi-axis milling process.

[0007] In the digital design of prosthetic work, particularly partial or complete dental dentures, the construction is divided into a "white" or tooth-colored tooth component (the denture tooth or teeth) and a gum-colored ("pink") denture base component (the denture base). Dental dentures therefore consist of a gum-colored or pink denture base and tooth-colored components (denture tooth or teeth).

[0008] There are methods, such as those known from DE 10 2009 056 752 A1 or WO 2013 / 124 452 A1, in which a partial or complete dental prosthesis is digitally set up and produced using CAD / CAM processes. Patent DE 103 04 757 B4 discloses a method for manufacturing dental prostheses in which the prosthetic teeth are virtually set up in a virtual model, and a prosthesis base is then manufactured based on this virtual model. EP 2 742 906 A1 discloses a method in which a dental arch is connected to an impression material, the impression material being contained in a customized impression tray and containing an impression of the patient's oral cavity. The surface of the tray with the dental arch is digitized, and then a virtual model of the dental arch is computationally positioned and oriented as closely as possible within the virtual model of the prosthesis base.

[0009] In the context of digital total or partial dentures, denture teeth are needed that can be bonded to the denture base in a clear and reproducible manner.

[0010] WO 2016 / 091 762 A1 discloses a method for manufacturing a dental prosthesis in which a template is produced with which several prosthesis teeth can be attached to a denture base in the desired position and orientation relative to each other. The prosthesis teeth are shortened by basal grinding in a cervical area to achieve the desired occlusal height. WO 2016 / 110 392 A1 discloses a method for manufacturing a dental prosthesis in which a plastically deformable connecting element is inserted into tooth sockets of a denture base to allow manual correction of the alignment of the prosthesis teeth in the denture base. DE 10 2008 019 694 B3 discloses a method and a device for manufacturing dental components from ceramics using a laser.From EP 2 571 451 B1 and EP 2 666 438 A2, methods for manufacturing dental prostheses are known in which prefabricated denture teeth are embedded in wax in a holder and subsequently milled cervically using a CAM process. It is necessary to shorten the denture teeth basally (or cervically) to adapt the tooth height to the patient's jaw, i.e., to adjust the bite height of the dental prosthesis to the patient's needs. WO 2014 / 159 436 A1 discloses a layered dental prosthesis with a reinforcement in the denture base that is cast into a basal cavity.

[0011] In both additive and subtractive manufacturing, the connection between the denture base and denture teeth presents a significant challenge. A critical aspect remains the joining of the digitally manufactured parts, particularly with regard to the precision of their relative positions. Bonding, even with the use of positioning aids such as fixation keys, invariably results in a more or less pronounced misfit that must be manually corrected by the clinician. The connection is typically achieved through bonding, but the quality of the joints is prone to errors due to the use of too little or too much adhesive, as well as the correct positioning of the denture teeth during the bonding process.While one-piece, two-color (gum-colored and tooth-colored) milling blanks are also available, they have a very good bond between the layers, but the aesthetics are always a compromise and therefore unsatisfactory due to the predetermined phase boundaries.

[0012] US patent 2009 / 0023112 A1 discloses the provision of a large number of sub-blanks in a holder to reduce the amount of milling waste in the production of crowns, abutments, and bridges. KR 1020160003528 A discloses a template with multiple recesses in which tooth-shaped components can be attached. DE 20 2015 004 759 A1 proposes filling a recess in a milling blank with a fluid material, which is then hardened and subsequently used to manufacture dental prostheses.

[0013] US Patent 2013 / 0101962 A1 discloses a method for manufacturing a dental prosthesis, in which several recesses are milled into a block along a dental arch. These recesses are filled with various types of resin, and the prosthetic teeth are fabricated from the resin that has hardened in the recesses. The block is then largely removed, and the prosthesis base is fabricated from the remaining material. This is a multi-stage milling process. Potential disadvantages of the method according to US Patent 2013 / 0101962 A1 include significant material loss, the time required to remove material from the block, and the wear and tear on the tools used.From EP 2 915 503 B1, a reverse process for manufacturing a dental prosthesis is known, in which a milling blank made of enamel material is subtractively machined to create a cavity that serves as a negative mold for the base of a dental prosthesis. Subsequently, the occlusal and basal surfaces of the dental prosthesis are subtractively manufactured from this composite. This is also a multi-stage milling process. A disadvantage of the process according to EP 2 915 503 B1 is that very large quantities of the relatively hard enamel material and other materials must be removed to manufacture the dental prostheses. This could not only result in the loss of a large amount of enamel material and other materials, but the milling tools could also be subjected to intensive wear, and the time required to implement the process would be relatively long.

[0014] 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 expenditure and tool stress are multiplied again.

[0015] Even when manufacturing denture teeth from round blanks used as milling bodies, the material consumption for the denture teeth is enormous. In particular, when individual denture teeth are milled from a round blank, a large amount of material is left over.

[0016] When manufacturing dental prostheses with a denture base, a disadvantage of conventional methods is that either the denture teeth or the denture base must be made from castable plastics such as PMMA-based materials. This limits the choice of materials.

[0017] The following options exist in the current state of the art for the production of digitally designed dental prostheses: 1. Milling or printing of the gum-colored denture base and bonding to artificial denture teeth, or alternatively to milled or printed tooth-colored segments. Disadvantages of this method can include: inaccuracies in manufacturing, time expenditure, aesthetic challenges due to excess adhesive or underfilling of marginal gaps, and limitations regarding the milling of cavities due to undercuts. 2. Milling of prefabricated milling discs with an integrated two-phase structure. An attempt can be made to achieve a natural aesthetic result through skillful arrangement of the transitions. A disadvantage here can be the position of the transitions from gum-colored to tooth-colored, which always represents a compromise and is aesthetically unsatisfactory. 3. Milling of pre-formed denture teeth into which prefabricated denture teeth are already integrated. With this method, primarily only the basal side of the dental prosthesis is individually fabricated. A disadvantage of this approach is that compatibility with individual patient cases is extremely limited, and many variations of pre-formed denture teeth must be kept in stock. 4. Layered construction of a dental prosthesis consisting of tooth-colored individual layers and a prosthesis base through repeated milling and refilling of the milled cavities. Disadvantages of this method can include significant material waste and time expenditure.

[0018] One object of the invention is to overcome at least one or more disadvantages of the prior art, at least partially. In particular, it aims to provide methods for manufacturing at least one prosthetic tooth and a method for manufacturing a dental prosthesis comprising at least one such prosthetic tooth, as well as a device for implementing such methods, which consume a smaller proportion of the material required for manufacturing the prosthetic teeth. Furthermore, the tools of the CAM device used, especially the CAM milling machine, should be conserved. 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 manufacturing at least one prosthetic tooth or dental prosthesis should also be found, which can achieve these advantages at least partially.

[0019] The processes should enable fast and resource-efficient manufacturing using subtractive CAM methods and, if necessary, additional additive CAM methods. Ideally, the process for manufacturing the dental prosthesis should minimize the amount of material required for both the denture teeth and the denture base. Manufacturing can be largely based on digital fabrication techniques. In particular, the materials should be able to be joined together during the process. Material selection should be as flexible as possible. It may be particularly advantageous to avoid a situation where the denture teeth and the denture base consist entirely of a hardened, previously liquid plastic. The process should be as simple and straightforward as possible for the dental technician to implement.In particular, fully automated or largely automated techniques such as CAD / CAM technologies should be used and available wherever possible.

[0020] The features of independent claims 1 and 22 contribute to at least partially fulfilling at least one of the aforementioned tasks. Dependent claims 2 to 21 provide preferred embodiments that contribute to at least partially fulfilling at least one of the tasks. Consequently, a method according to claim 1 and an apparatus for implementing such a method according to claim 22 contribute at least partially to solving the tasks. Preferred variants are claimed in dependent claims 2 to 21.

[0021] The objects of the invention are thus at least partially or partially solved by a method for manufacturing 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 each other in the method, wherein the at least one prosthetic tooth is manufactured using a subtractive CAM method according to at least one virtual three-dimensional model of the at least one prosthetic tooth, wherein the method comprises the following chronological steps: A) Creating at least one virtual three-dimensional model of at least one prosthetic tooth using a CAD method according to a virtual three-dimensional model of the dental prosthesis; B) Selection of 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 in such a way that the volume of the at least one prosthetic tooth can be completely accommodated in the volume of the at least one insert element; C1) Selecting a milling body with at least one recess matching the at least one insert element, such that the at least one insert element can be inserted into the at least one recess in a fit, or 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; D) Inserting or plugging the at least one insert element into the at least one recess in the milling body, wherein one or more of the at least one insert element(s) together have the same geometric shape as the at least one recess and are inserted individually or together into the appropriate at least one recess; E) Securing the at least one insert element in the at least one recess by embedding, polymerizing or bonding the at least one insert element 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; F) Mounting the milling body in a CAM fixture; and G) Extraction of at least one prosthetic tooth using the CAM device according to the specifications of at least one virtual three-dimensional model of the at least one prosthetic tooth from at least one insert element.

[0022] A dental prosthesis according to the present invention comprises a denture base (usually made of a gum-colored ("pink") plastic) and at least one denture tooth (usually made of a tooth-colored plastic or tooth-colored ceramic). Additionally, the dental prosthesis may have a support structure, made, for example, of a metal or plastic, which serves to secure the dental prosthesis in the patient's oral cavity. A dental prosthesis may be a partial denture or a complete denture.

[0023] In the present context, a fit of the at least one insert element in the at least one recess is understood to mean 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(s). In particular, it may be provided that, in the case of a fit, a uniform gap (preferably a maximum of 5 mm, particularly preferably a maximum of 1 mm, most preferably a maximum of 0.1 mm) exists between the inserted at least one insert element and the surrounding edge of the corresponding at least one recess, or that the at least one insert element can be press-fitted into the corresponding at least one recess.

[0024] An interference fit is defined as a fit in which at least one insert element is in direct contact with two opposing walls or wall sections of at least one recess, and where elastic deformation or an elastic force of the at least one insert element and / or the material of the milling body exerts pressure on the at least one insert element, which holds and secures it in the at least one recess. This pressure can be very low and localized. The interference fit does not necessarily have to extend along the entire circumference of the at least one insert element. Similarly, the uniform gap between contact points or surfaces can be interrupted, with the at least one insert element bearing against these points or surfaces on its outer circumference.

[0025] A precise fit allows for the unambiguous assignment of each insert element, or multiple inserted elements, to the respective recess, thus defining the desired position and orientation of the insert element(s) within the recess. This can involve inserting or plugging in multiple insert elements in pairs or groups, adjacent to one another, into at least one recess.

[0026] However, according to the invention, preferably exactly one insert element is placed or plugged into a recess.

[0027] The term "removing at least one prosthetic tooth from at least one insert" means that at least 80%, preferably at least 90%, of the surface of the at least one prosthetic tooth is finished after step G) and—apart from 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 is held over the milling body and remains connected to the CAM device. These are manually separated after completion of the CAM process, and the remaining connection is finished.

[0028] Preferably, in step G) at least 80% of the surface(s) of the at least one insert element are processed; more preferably, at least 90% of the surface(s) of the at least one insert element are processed in step G).

[0029] At least one of the insert elements preferably has a geometric shape, but can alternatively have an approximate tooth shape.

[0030] In step A), a separate three-dimensional virtual model can be created for each denture tooth using CAD software. Alternatively, groups of denture teeth can be created in step A) as a single, cohesive three-dimensional virtual model using CAD software. The latter has the advantage that contiguous tooth sections can be manufactured together.

[0031] It may be intended that at least one of the insert elements is not an anatomically pre-shaped or prefabricated denture tooth. This clarifies that the occlusal areas of at least one denture tooth are also to be milled out of the insert element.

[0032] In the methods according to the invention, it can be provided that in step G) when machining out 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 retention geometry.

[0033] This clarifies that the at least one insert element can preferably be a body of any shape. This means that it may be sufficient to have a small number of possible insert elements available for manufacturing the denture teeth, in order to produce all possible denture teeth. The retention geometry can be realized, for example, by bars that connect the denture teeth machined from the at least one insert element in step G) to the remaining milling body. At least parts of the retention geometry, in the areas adjacent to the denture teeth, consist of the material of the at least one insert element from which the denture teeth were formed. In a final step, the retention geometry is separated to isolate the denture teeth individually or in groups and separate them from the milling body. This separation can be achieved, for example, by cutting, breaking, and / or milling the retention geometry.

[0034] Furthermore, it may be provided that in step A) the virtual three-dimensional model of the dental prosthesis is created by CAD design and adaptation to a virtual three-dimensional model of the oral cavity situation of a patient.

[0035] This further automates the inventive method and allows it to be largely computer-assisted.

[0036] Furthermore, it may be provided that in step B) the selection of at least one insert element is additionally made depending on the function and / or the position of the prosthetic tooth in the dental prosthesis, wherein the selection of at least one insert element preferably takes into account the color, the transparency and the mechanical physical properties of the at least one insert element.

[0037] This allows, for example, molars to have a different color, hardness, and elasticity than canines and incisors. This enables each tooth to possess the physical properties suitable for its purpose and, through its color, to be adapted to the appearance of a natural dentition.

[0038] It may also be provided that in step B) the selection of at least one insert element is additionally made depending on an individually defined color selection and / or computer-aided color selection via color matching.

[0039] This makes it possible to create a particularly aesthetically pleasing dental prosthesis.

[0040] Furthermore, it may be provided that after step C2) an electronic storage of the shape of the at least one recess generated in step C2) takes place together with an identifier of the milling body, so that in subsequent processes the milling body with the recess generated in step C2) is available as a selectable milling body within the framework of a step C1).

[0041] This allows for the reuse of machined milling bodies with recess(s) suitable for subsequent processes. This makes the process resource-efficient and can save the time required to manufacture at least one recess in the future.

[0042] 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) to fix the at least one insert element, wherein preferably the wax is removed in step H) by boiling or melting or chemically, or the polymerizable plastic or the adhesive is chemically dissolved.

[0043] It is theoretically also possible to use a combination of different materials (wax, adhesive and / or plastic) to attach at least one insert element in step E).

[0044] 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 then be reused using a method according to the invention.

[0045] Preferably, the at least one insert element may have a symmetrical geometric shape with at least one plane of mirror symmetry and / or at least one axis of rotational symmetry, 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.

[0046] In the present case, a cylindrical shape is to be understood as the shape of a general cylinder with any base area and not only a cylinder with a circular base, unless the shape of the base is specified.

[0047] These shapes allow for easy insertion of at least one insert element into at least one recess. Furthermore, these shapes closely approximate a general tooth shape, so that the amount of material to be removed from at least one insert element remains minimal.

[0048] According to a further training, 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 inserting element and preferably the remains of the at least one inserting element are removed from the at least one recess, wherein the investment material is particularly preferably also removed from the at least one recess.

[0049] This process detaches the at least one prosthetic tooth from the milling body, allowing it to be used for constructing the dental prosthesis, if necessary after final processing (deburring, hardening, surface treatment, and / or polishing). According to the invention, the at least one prosthetic tooth can be inserted into a denture base manufactured using a CAD / CAM process and secured there, particularly preferably by bonding the at least one prosthetic tooth into tooth sockets of the denture base.

[0050] Preferably, it may be provided that, after separating the at least one prosthetic tooth from the milling body and the remnants of the at least one insert, the surface of the at least one insert has been removed from the at least one prosthetic tooth by at least 95%, and particularly preferably by at least 99%. This clarifies that the at least one insert is not a prefabricated prosthetic tooth.

[0051] Furthermore, it may be provided that in step B) each prosthetic tooth is assigned its own separate insert element or that several groups of adjacent prosthetic teeth are each assigned their 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.

[0052] This allows the inserts to be pre-shaped to match the prosthetic teeth to be fabricated and, if necessary, also colored to fit. Furthermore, inserts with suitable mechanical and physical properties can be selected. Molar denture teeth are also known as back teeth or grinding teeth, incisor denture teeth as incisors, and canine denture teeth as canines.

[0053] The problems underlying the present invention are at least partially solved by a method for manufacturing 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 each other in the method, wherein the at least one prosthetic tooth is manufactured using one of the previously described methods according to the invention.

[0054] The process for manufacturing the dental prosthesis utilizes the advantages of the process for manufacturing the prosthetic teeth.

[0055] The procedure for implementing step G) may include the following steps: 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 investment material, using a subtractive CAM process according to the virtual three-dimensional model of the dental prosthesis, wherein the connecting surface and the negative mold are adjacent to each other; I) Pouring at least one fluid polymerizable plastic into the joining surface and into the negative mold and into the volume removed in step H) and curing the at least one fluid polymerizable plastic, wherein, during the curing of the at least one fluid polymerizable plastic, a cured plastic material is formed which is firmly and flush bonded to the material of the insert element; and J) Subtractive machining of the hardened plastic material from the direction of a top surface of the milling body containing at least one recess using a CAM method according to a basal surface of the virtual model of the dental prosthesis and subtractive machining of the milling body from the direction of a bottom surface of the milling body opposite the top surface of the milling body using a CAM method according to an occlusal surface of the virtual model of the dental prosthesis or according to 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 hardened plastic material and the associated material of the at least one insert element.

[0056] In this process, according to the invention, a wax or a polymerizable plastic is preferably used as the investment material, if an investment material is required. A gum-colored plastic is particularly preferably used as the investment material in step E). According to the invention, the fluid polymerizable plastic used in step I) can also preferably be used as the investment material in step E) beforehand.

[0057] In this way, the milling body can also be used directly for the fabrication of the denture base from the fluid polymerizable resin. For this to work, it is important that all denture teeth, which are produced from inserts placed or inserted into the milling body and attached during or after the process, have the position and orientation intended for each other in the final denture base. Additional denture teeth can, if desired, subsequently be inserted separately into the denture base and attached to it. However, the preferred method is to fabricate all denture teeth of the dental prosthesis from the attached inserts.

[0058] A support structure can be incorporated into the denture base by attaching it to the milling body before step I) and embedding it in at least one fluid polymerizable resin during step I). The milling body may not be reusable in this application. However, a complete dental prosthesis can be fabricated directly from the milling body.

[0059] It may be provided that the negative form of at least the partial area of ​​the oral surface of the denture 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 investment material, is generated with an offset, wherein the offset increases the volume of the virtual model of the dental prosthesis.

[0060] An offset for the negative form of the surface area of ​​the dental prosthesis refers to an extension of the surface of the dental prosthesis, in particular a uniform extension of the surface of the dental prosthesis, towards 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 at least one recess (especially the occlusal direction of the dental prosthesis) can be carried out according to the virtual model without the offset in the cured resin.This ensures that, after subtractive machining of the milling body from the underside, no residues of the first material remain on the surface of the dental prosthesis, thus preventing any negative impact on the aesthetic appearance and / or physical properties of the dental prosthesis manufactured using this method. The offset can be achieved, for example, and preferably according to the invention, by computationally adding a distance vector to the surfaces of the virtual model of the dental prosthesis oriented towards the underside of the milling body that are not to be made of the material of the inserts. This distance vector can be oriented towards the underside of the milling body, resulting in a parallel displacement of the surfaces of the virtual model of the dental prosthesis that are not to be made of the first material.Alternatively, the distance vector can also be positioned perpendicular to the surface of the virtual model of the dental prosthesis, so that the relevant surfaces of the virtual model are extended uniformly. Other equivalent or similar possibilities for using a distance vector or other calculation methods to generate the offset are readily conceivable and feasible for a person skilled in the art.

[0061] Furthermore, it may be provided that in step I) at least one of the at least one fluid polymerizable plastics fully wets at least the surfaces produced in step H) in the at least one insert element during filling.

[0062] This ensures that a stable connection is created between the material of at least one insert element and the hardened plastic material, and thus between at least one prosthetic tooth and the prosthetic base.

[0063] Furthermore, it may be provided that the dental prosthesis has a support structure, wherein the support structure is firmly connected to the denture base or to the denture base and the at least one denture tooth, wherein the support structure is intended for fixing the dental prosthesis in the oral cavity of a patient, wherein the at least one denture tooth and the denture base and the support structure are firmly connected to each other in the process.

[0064] This allows a dental prosthesis with a support structure for fixing the dental prosthesis in the oral cavity, in particular a partial dental prosthesis with such a support structure, to be manufactured using the method according to the invention.

[0065] It may be provided that the support structure consists of or is made of a material with a greater hardness and / or elasticity than fully cross-linked PMMA and / or that the support structure is made of metal, ceramic, stainless steel, titanium or a titanium alloy.

[0066] For the hardness of fully cross-linked PMMA, a ball indentation hardness of 195 MPa according to ISO 2039-1 is assumed.

[0067] For the elasticity of fully cross-linked PMMA, a tensile modulus of elasticity according to ISO 527 of approximately 3200 MPa is assumed and / or a tensile strength according to ISO 527 of approximately 73 MPa is assumed.

[0068] A modular milling body system for the production of at least one prosthetic tooth or a dental prosthesis is also disclosed, wherein the modular milling body system comprises at least one milling body and several 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 when placed next to each other, have the same geometric shape as the at least one recess.

[0069] In this context, a fit of the at least one insert element in the at least one recess is understood to mean 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(s). In particular, it may be provided that there is a uniform gap between the at least one insert element and the surrounding edge of the corresponding at least one recess, or that the at least one insert element can be press-fitted into the corresponding at least one recess. A fit allows for a unique assignment of the respective insert element to the respective recess and establishes the desired position and orientation of the respective insert element within the respective recess.

[0070] A recess suitable for one or more of the insert elements is the recess into which the insert element or several adjacent insert elements can be inserted or plugged in.

[0071] It can be provided that at least one milling body has a solid body made of a first material, wherein at least one recess is formed in the first material.

[0072] Furthermore, it can be provided that the insert elements, individually or when placed next to each other, have the same geometric shape but are smaller than the matching at least one recess, so that when one insert element or several adjacent insert elements are placed in the matching at least one recess, a uniform gap remains between the at least one insert element or elements placed in the at least one recess and an inner circumferential side wall of the recess, wherein preferably a gap dimension of the gap is a maximum of 1 mm, particularly preferably at least 1 µm and a maximum of 1 mm, and most particularly preferably at least 10 µm and 100 µm.

[0073] This allows the insert elements to be attached stably and with little or no embedding material in at least one recess.

[0074] It may be provided that the insert elements have a symmetrical geometric shape, preferably the insert elements have a symmetrical geometric shape with at least one plane of mirror symmetry and / or at least one axis of rotational symmetry, particularly 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.

[0075] In the present case, 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, unless the shape of the base is specified otherwise.

[0076] These shapes allow for easy insertion of the insert elements into a recess in at least one milling body. Furthermore, these shapes closely approximate a general tooth shape, thus minimizing the amount of material that needs to be removed from each insert element.

[0077] It can also be provided that the insert elements consist of at least one material for the manufacture of prosthetic teeth, preferably at least two of the insert elements consist of at least two different materials for the manufacture of prosthetic teeth.

[0078] This allows the denture teeth to be fabricated from the inlay elements. If multiple materials are available 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.

[0079] Furthermore, it may be provided that the insert elements have different sizes, in particular different heights, shape proportions and / or weights.

[0080] Furthermore, it may be provided that the inlay elements have different colors and / or transparencies, in particular different tooth-colored colors and / or transparencies.

[0081] This allows for the production of a more aesthetically pleasing and a more functional dental prosthesis using the modular milling body system.

[0082] Furthermore, it may 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.

[0083] This allows the milling body to be machined more easily using subtractive methods than the insert elements. This enables time-saving and resource-efficient production of dental prostheses with the modular milling body system.

[0084] 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 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 fixed in the at least one recess of the at least one milling body.

[0085] This further completes the modular milling body system. By selecting a suitable investment material, the fabrication of the dental prosthesis using the modular milling body system can be further simplified.

[0086] It can also be provided that a cavity for receiving a fluid polymerizable plastic is arranged on a top side of the at least one milling body, wherein the cavity has a surface as its bottom, wherein the at least one depression is arranged in the surface, and the cavity is laterally bounded 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, most preferably of at most 5 mm, and / or the circumferential wall is at least 5 mm high, particularly preferably at least 15 mm high.

[0087] An annular wall according to the present invention has a recess that encloses the geometric center of the recess. Preferably, the recess is formed without undercuts and / or every point in the recess is connectable to every other point in the recess in a straight line, without the straight line running within the surrounding wall. Preferably, the recess is a compact geometric body. By providing and using a cavity for filling with a fluid polymerizable plastic as material for manufacturing the prosthesis base on a top surface of a milling body for the production of the dental prosthesis, it is possible to reduce the amount of material of the insert(s) and the milling body that must be subtractively milled or removed by cleverly 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 position the basal surface of the more abrasion-resistant denture teeth or the occlusal part of the dental prosthesis within the area of ​​the cavity's surface. The lighter and easier-to-mill plastic used to fabricate the denture base or basal part can then simply be poured into the created cavity, only needing to be filled to the desired height. This results in material savings for the denture base. Every material saving automatically leads to time savings and reduces wear on the tools used, especially when working with particularly abrasion-resistant and durable materials.

[0088] This allows a fluid, polymerizable plastic to be filled into the cavity for the fabrication of the dental prosthesis, without the need to first create it in the milling body. This makes the modular milling body system even more versatile for the fabrication of dental prostheses.

[0089] It may be provided that a marking for determining a fill level in the cavity is arranged on at least one inner and / or outer surface of the circumferential wall bounding the cavity, wherein preferably the marking has a scale with equidistant calibration marks and / or numbers, particularly preferably a length scale for determining a fill height or volume of a fluid polymerizable plastic in the cavity.

[0090] 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 also protecting the milling tools.

[0091] It may be provided that the circumferential wall of at least one milling body is formed by a pipe section or a ring body that is fixed to the solid body.

[0092] These measures allow for simple and cost-effective production of the milling body.

[0093] It may be provided that the side of the at least one milling body, in which the at least one recess is arranged, is flat.

[0094] Furthermore, it can be provided that at least one milling body is a disc with a cylindrical outer circumference.

[0095] Furthermore, it may be provided that the milling body has a holder on its outside for attaching the milling body to a suitable counter-holder of a CAM device.

[0096] These measures also allow for simple and straightforward application of the modular milling body system.

[0097] Furthermore, it may be provided that the modular milling body system is suitable and intended for the implementation of a previously described procedure.

[0098] The modular milling body system is particularly well suited for implementing the methods described above or according to the invention and benefits in particular from the measures and advantages of the methods described therein.

[0099] The problems underlying the present invention are at least partially solved by a device for implementing a previously described method, wherein the device comprises an insert element selection module and a milling body provisioning module, wherein the insert element selection module is configured such that the at least one insert element can be selected depending on the at least one virtual three-dimensional model of the at least one prosthetic tooth, wherein the selection is carried out 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, and wherein the milling body provisioning module is configured such that the milling body with at least one recess matching the at least one insert element can be selected.so that at least one selected insert element can be inserted into a fit into at least one recess, and / or the milling body provisioning module is designed such that a CAD model for at least one recess in a milling body can be calculated to match the at least one insert element, so that at least one selected insert element can be inserted into a fit into at least one recess.

[0100] 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.

[0101] In particular, the device according to the invention can be a device for manufacturing at least one prosthetic tooth for a dental prosthesis or a device for manufacturing a dental prosthesis with at least one prosthetic tooth, preferably with several prosthetic teeth.

[0102] In summary, the invention relates to a method for manufacturing a prosthetic tooth according to a virtual three-dimensional model, comprising the following steps: A) Creating the model using a CAD method according to a virtual three-dimensional model of a dental prosthesis; B) Selection of an insert element depending on the model of the prosthetic tooth; C) Selecting a milling cutter with a suitable recess or creating a suitable recess in a milling cutter; D) Inserting or plugging the insert element into the recess, wherein the insert element or several insert elements placed next to each other together have the same geometric shape as the recess; E) Securing the insert in the recess; F) Mounting the milling body in a CAM fixture; and G) Extraction of the prosthetic tooth using the CAM device according to the model from at least one insert element.

[0103] The invention also relates to a modular milling body system for the production of at least one prosthetic tooth or a dental prosthesis and a device for implementing such a method.

[0104] The invention is based on the surprising finding that by using insert elements made of a material suitable for denture teeth and with a known and appropriate geometry, embedded in or press-fitted into a milling body, it is possible to mill denture teeth from the insert elements while consuming only a small amount of the material suitable for denture teeth. Furthermore, the milling bodies can be reused multiple times by utilizing the at least one existing recess to accommodate new insert elements in subsequent manufacturing processes. A particularly precise fit of the insert elements into the recesses of the milling bodies is not critical during embedding, as the insert elements can have a sufficient oversize to ensure that the desired denture tooth, digitally designed using CAD software, fits adequately within the respective insert element.Naturally, a particularly precise fit can further reduce material waste from the inserts suitable for the prosthetic teeth. However, this requires more precise positioning of the inserts, which can be achieved, for example, by press-fitting at least one insert into at least one recess of the milling body.

[0105] With the method according to the invention and with the aid of the modular milling body system for the production of at least one prosthetic tooth, as well as with the device for implementing the method, the application of digital manufacturing techniques for the production of the at least one prosthetic tooth is possible. Furthermore, a prosthetic base and, if desired, a support structure can be directly connected to the prosthetic teeth manufactured according to the invention during the production of the dental prosthesis, based on 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-efficient production during the implementation of the manufacturing process.

[0106] In the production of dental prostheses, it is surprisingly possible to directly connect the prosthetic teeth, created from several inserts in the support structure, to the denture base by calculating and / or creating the connection surface. This is achieved by filling the base with polymerizable resin. The connection surface is calculated using virtual three-dimensional models—and, if necessary, additional virtual three-dimensional models generated during the process—and is created in the milling body and the inserts attached to it. This allows for a minimal amount of both the fluid polymerizable resin used and the amount of material from which the inserts are made.

[0107] By using a milling cutter geometry that roughly corresponds to the final dimensions, significantly reduced material consumption can be achieved. A wider range of materials can also be used; the limitation to PMMA no longer applies. Due to the reduced subtractive material removal, milling times can also be significantly reduced. Because the final milling is performed only after the workpiece has been fused, the result corresponds with high accuracy to the digital data, i.e., the virtual three-dimensional model of the dental prosthesis to be manufactured.

[0108] The inventive method achieves a high degree of accuracy in the fit of the dental prosthesis through direct milling of the final shape. This eliminates the need for bonding individual prosthesis teeth and prevents inhomogeneities in the dental prosthesis resulting from a joining process. Simultaneously, a particularly abrasion-resistant material for at least one prosthesis tooth can be achieved by fully curing the inserts or by using particularly hard and strong inserts. Furthermore, the use of layered inserts allows for the creation of a particularly aesthetically pleasing prosthesis tooth material. In dental prostheses, a natural color transition from gum-colored to tooth-colored is achieved in the appropriate locations, eliminating the need for compromises.Particularly high aesthetics can be achieved by using multilayer inlay elements for at least one prosthetic tooth.

[0109] The production from the insert elements, the milling body, 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.

[0110] The pre-formed inserts can already be shaped to fit, for example, a standard shape such as a cylinder or bar. The required recesses or cavities in the milling body, which serves as the base material, can either be generated in a separate step beforehand or be pre-formed in a standardized way. The materials required for this area, e.g., different colors, are individually inserted into the recesses in the form of custom-fit inserts. These inserts can be fixed in place by polymerization or, alternatively, by adhesive bonding. For example, an adhesive that can be reversibly removed can be used for bonding. This allows, for instance, the removed material remnants to be taken out and replaced with new inserts after subsequent heating. This enables the milling body to be reused multiple times.The insert elements embedded in the milling body as carrier discs are then machined using a suitable milling machine in CAM.

[0111] The following are exemplary embodiments of the invention, illustrated by ten schematic figures and a flowchart, without limiting the invention. These figures show: Fig. 1: a schematic perspective view of a top side of a first milling body according to the invention (left) and to the right of it a suitable insert element; Fig. 2: a schematic perspective view of a top surface of a second milling body according to the invention (left) and a suitable insert element to the right of it; Fig. 3: a schematic perspective view of the milling body according to Fig. 2 with inserted insert element; Fig. 4: a schematic perspective view of the milling body according to Fig. 3 with attached insert element; Fig. 5: a schematic perspective view of the milling body after Fig. 4, wherein two prosthetic teeth are machined out of the attached insert element; Fig. 6: a schematic perspective view of the top side of a third milling body according to the invention (top) with several recesses and several insert elements below; Fig. 7: a schematic perspective transparent view of a side side of a fourth milling body according to the invention with an inserted insert element and with a cross-sectional view and a position of the dental prosthesis to be produced therewith; Fig. 8: A schematic view of the top side of the milling body after Fig. 7 after the subtractive shaping of the connecting surface and the negative form for the oral side of the denture base; Fig. 9: A schematic view of the basal side of the dental prosthesis after subtractive machining from the previously filled and then hardened plastic material; Fig. 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 Fig. 11: the process of a method according to the invention for manufacturing a dental prosthesis.

[0112] Fig. Figure 1 shows a schematic perspective view of a top surface (in Fig. 1 above) of a first milling body 1 according to the invention and to the right of it a suitable insert element 7. The milling body 1 preferably has a solid body 2 made of a material that is easy and precise to mill. 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 surface opposite the top surface of the milling body 1 (in Fig. 1 not visible).

[0113] The material for insert element 7 can be a fully polymerized, tooth-colored plastic suitable for the fabrication of denture teeth and possessing the necessary abrasion resistance. The material of insert element 7 should preferably be biocompatible as it is present in the insert element 7 in order to be suitable for use in a patient's oral cavity.

[0114] A cavity 4 with a flat surface 6 can be arranged on the upper surface of the milling body 1, wherein the cavity 4 can be laterally bounded by a circumferential wall 8. The surface 6 is (preferably completely) formed by the solid body 2. The circumferential wall 8 can be made of the same material as the solid body 2 or of a different material. In particular, the circumferential wall 8 can be an annular body or a tube section that is placed onto the solid body 2 and firmly connected to it. The connection can be made by adhesive bonding. The solid body 2 can be cylindrical. The solid body 2 can have a step on its outer circumference for placing a ring-shaped body or tube section as a circumferential wall 8, onto which the ring-shaped body or tube section is placed flush. The circumferential wall 8 can, in particular, be a cylindrical tube section. The circumferential wall 8 can also be a metal ring-shaped body.

[0115] A marking 9 for determining the fill level in the cavity 4 can be arranged on an inner surface of the circumferential wall 8 facing the cavity 4, or on an outer surface of a circumferential transparent wall 8. The marking 9 can also be added to the circumferential wall 8 during the manufacturing process of a dental prosthesis, for example, by milling it in. The marking 9 allows the fluid polymerizable plastic (in the cavity 4) to be filled into the cavity 4 to be measured. Fig. (1 not shown) to be filled to the correct height.

[0116] A recess 3 is arranged in the surface 6 of the solid body 2, into which the insert element 7 or other insert elements (not shown) can be inserted or plugged.

[0117] At least one mounting bracket 10 for fixing the milling body 1 in a CAM device can be arranged on at least one outer wall of the milling body 1. The mounting bracket 10 can project from the outer wall of the milling body 1 as an attached torus with a rectangular cross-sectional area. Alternatively to the one described in Fig. The bracket 10 shown in Figure 1 can also be implemented in other ways, for example by means of protruding projections or recesses in the side surfaces. The bracket 10 is used for mounting in a CAM device (not shown).

[0118] The milling body 1 after Fig. 1 can be used in a method according to the invention as follows. The insert element 7 is placed or inserted into the recess 3 and, if necessary, secured in the recess 3 using an investment material (such as a fluid polymerizable plastic or a wax that is fluid when heated). The milling body 1 with the insert element 7 attached 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 interface between the material of the prosthesis teeth and the cured plastic material to be produced from a fluid polymerizable plastic, according to the specifications of a virtual CAD model of a dental prosthesis.The connecting surfaces between the denture teeth and the denture base can be fabricated exclusively in the insert 7. Furthermore, the occlusal and oral surfaces of the surfaces made from the cured resin material can be machined as a negative mold from the solid body 2 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 would be required for the occlusal and oral surfaces of the cured resin material according to the CAD model with a direct negative mold. Additionally, the marking 9 can be created on the circumferential wall 8 in this step. Subsequently, the newly created surface can be cleaned in the surface 6 of the solid body 2 and in the insert 7.

[0119] The fluid polymerizable resin (not shown) can then be poured into cavity 4 to a level sufficient to allow the cured resin portion of the dental prosthesis (the denture base) to be completely milled from the cured resin material on the basal side, according to the virtual CAD model. The fluid polymerizable resin cures under pressure and temperature, forming the hardened resin material. The intermediate product can then be reattached to the subtractive CAM device, and the dental prosthesis is milled using the CAM device, based on the occlusal and basal surfaces of the virtual CAD model of the dental prosthesis.The denture teeth of the dental prosthesis then consist of the material of the insert element 7 and the denture base of the dental prosthesis then consists of the hardened plastic material.

[0120] The Fig. Figures 2 to 5 show the process of a method according to the invention using a second milling body 11 according to the invention. Fig. 2 a schematic perspective view of a top side of the second milling body 11 according to the invention (left) and to the right of it a suitable insert element 17.

[0121] The milling body 11 has a solid body 12 made of a material that is easy and precisely millable. 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 easily during milling. The solid body 12 extends to a bottom surface opposite the top surface of the milling body 11 (in the Fig. 2 to 5 not visible).

[0122] The material for the insert element 17 can be a fully polymerized, tooth-colored plastic suitable for the manufacture of denture teeth and possessing the necessary abrasion resistance. The material of the insert element 17 should preferably be biocompatible as it is present in the insert element 17 in order to be suitable for use in a patient's oral cavity.

[0123] 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 bounded by side walls 14 and a bottom 15. The insert element 17 can have side walls 18 that match the side walls 14 of the recess 13.

[0124] At least one mounting bracket 20 for fixing the milling body 11 in a CAM device can be arranged on at least one outer wall of the milling body 11. The mounting bracket 20 can project from the outer wall of the milling body 11 as an attached torus with a rectangular cross-sectional area. Alternatively to the one described in the Fig. The bracket 20 shown in Figures 2 to 5 can also be implemented in other ways, for example by means of protruding projections or recesses in the side surfaces. The bracket 20 is used for mounting in a CAM device (not shown).

[0125] A tube section (not shown) can be fitted around surface 16 to form an annular wall. For this purpose, the tube section can be fitted or press-fitted onto the milling body 11, with a circumferential support 20 serving as a stop. The connection can be made by adhesive bonding. Once the tube section is fitted, a cavity with surface 16 is laterally bounded by a circumferential wall. This can be done after machining the milling body 11 using 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.

[0126] The insert element 17 can be inserted into the recess 13. This situation is in Fig. 3 shown. A gap remains between the side walls 14 of the recess 13 and the side walls 18 of the insert element 17.

[0127] The insert element 17 can be secured in the recess 13. This situation is in Fig. Figure 4 shows that the gap between the insert element 17 and the recess can be filled by filling it with an embedding material 22. The embedding material 22 can be a wax, an adhesive, or a fluid polymerizable plastic. The embedding material 22 fixes and secures the insert element 17 in the recess 13 of the milling body 11. The embedding material 22 can also be positioned between the bottom 15 of the recess 13 and the insert element 17. It is also possible to fill the recess 13 with the embedding material 22 before inserting the insert element 17.

[0128] The milling body 11 with the insert element 17 fixed in the recess 13 can then be fixed in a CAM device. Using a virtual three-dimensional model of denture teeth for a dental prosthesis to be produced, these can be created in the material of the insert element 17. This situation is described in Fig. Figure 5 shows where two denture teeth 26 have already been largely machined out of the attached insert element 17. The denture teeth 26 have a basal connecting surface 24, which is provided for connection with a denture base of the dental prosthesis. By subsequent machining from the other side of the milling body 11, the denture teeth 26 can be completely machined out and then (if necessary after final machining) glued into a denture base (not shown) to produce the finished dental prosthesis. Alternatively, according to the invention, a method as described above can also be used. Fig. 1 can be used and the denture base can be created directly on the connecting surface 24. The oral surface of the denture base can also be created analogously to the one described above. Fig. 1 described process 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.

[0129] Fig. Figure 6 shows a schematic perspective view of a top side (in Fig. 1 above) of a third milling body 31 according to the invention and several insert elements 37 below it. The milling body 31 preferably has a solid body 32 made of a material that is easy and precise to mill. 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 surface opposite the top surface of the milling body 31 (in Fig. 6 not visible).

[0130] Differently colored and / or hard, fully polymerized tooth-colored plastics suitable for the fabrication of denture teeth and possessing the necessary abrasion resistance can be used as materials for the inserts 37. The materials for the inserts 37 should preferably be biocompatible as they are already present in the insert 37 in order to be suitable for use in a patient's oral cavity.

[0131] A flat surface 36 can be arranged on the upper side of the milling body 31. The surface 36 is (preferably completely) formed by the solid body 32. The solid body 32 can be cylindrical in shape.

[0132] Several recesses 33 are arranged in the surface 36 of the solid body 32, into which the insert elements 37 can be inserted individually or in groups. The recesses 33 can be bounded by side walls 34 and a bottom 35. The insert elements 37 can have side walls 38 that match the side walls 34 of the recess 33. The insert elements 37 can be inserted individually or in groups, either fitting or not fitting into the recesses 33. 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 press-fitted into the recesses 33. If gaps or free spaces remain, these can be filled with an embedding material (in Fig. (6 not shown) can be partially or completely filled. The embedding material can be a wax, an adhesive, or a fluid polymerizable plastic. The embedding material can also be placed between the bottom 35 of the recesses 33 and the insert elements 37. It is also possible to fill the recesses 33 with the embedding material before inserting the insert elements 37.

[0133] At least one mounting bracket 40 for fixing the milling body 31 in a CAM device can be arranged on at least one outer wall of the milling body 31. The mounting bracket 40 can project from the outer wall of the milling body 31 as an attached torus with a rectangular cross-sectional area. Alternatively to the one described in Fig. The bracket 40 shown in Figure 6 can also be implemented in other ways, for example by means of protruding projections or recesses in the side surfaces. Bracket 10 is used for mounting in a CAM device (not shown).

[0134] The milling body 31 according to Fig. 6 can be used in a method according to the invention as follows. Several of the insert elements 37 are selected computationally using an insert element selection module to match a virtual three-dimensional model of the denture teeth of a dental prosthesis to be manufactured, and are then inserted or plugged into the corresponding recesses 33 of the milling body 31 and, if necessary, fixed in the recesses 33 using an investment material (such as wax). The milling body 31 with matching recesses 33 can be selected computationally beforehand using a milling body provisioning module, based on the virtual three-dimensional model of the denture teeth or on a virtual three-dimensional model of the dental prosthesis. The selection is made according to the denture teeth and their arrangement in the dental prosthesis according to the virtual three-dimensional model of the dental prosthesis.

[0135] The milling body 31, with the insert elements 37 attached to it, is fixed in a subtractive CAM device, such as a computer-controlled multi-axis milling machine, using the holder 40. With the aid of 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 negative mold corresponds to the interface between the material of the denture teeth and the cured plastic material to be produced from the fluid polymerizable resin, according to the specifications of a virtual three-dimensional model of the dental prosthesis. The interfaces between the denture teeth and the denture base are manufactured exclusively in the insert elements 37.Furthermore, the occlusal and oral surfaces of the surfaces made from the cured plastic material are machined as negative molds from the solid body 32 and, if applicable, the investment material 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 32 than would be required for the occlusal and oral surfaces of the cured plastic material according to the virtual three-dimensional model of the dental prosthesis in a direct negative mold. Subsequently, the newly created surface can be cleaned in the surface 36 of the solid body 32 and in the inserts 37.

[0136] A fluid polymerizable resin (not shown) can then be applied to the subtractively produced surface to a height sufficient to allow the cured resin portion of the dental prosthesis to be completely machined from the cured resin material on the basal side, according to the virtual three-dimensional model. The fluid polymerizable resin can be cured under pressure and temperature, forming a hardened resin material from which a denture base can be fabricated. Subsequently, the intermediate product can be reattached to the subtractive CAM device, if necessary, and the dental prosthesis is machined using the CAM device, based on the occlusal and oral surfaces and the basal surfaces of the virtual three-dimensional model of the dental prosthesis.The denture teeth of the dental prosthesis then consist of the material of the insert elements 37 and the denture base of the dental prosthesis then consists of the hardened plastic material.

[0137] With the Fig. In sections 7 to 10, the process of a method according to the invention is explained by way of example using a fourth milling body 51 according to the invention and a virtual CAD model of a dental prosthesis 82.

[0138] Fig. 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 ​​the Fig. 7). Fig. Figure 8 shows a schematic view of the top side of the milling body 51. Fig. 7 after the subtractive shaping of the connecting surface and the negative form 81 for the oral side of the denture base 72 and Fig. 9 a schematic view of the basal side of the dental prosthesis 82 after subtractive machining from the previously filled and then hardened plastic material. Fig. 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 hardened plastic material.

[0139] The virtual CAD model of dental prosthesis 82 is in Fig. 7 is drawn in the desired position in the milling body 51, either above or into the milling body 51. This, as with some of the following figures, serves to illustrate how the dental prosthesis 82 to be manufactured lies in the milling body 51 before it has been milled out. This clarifies the sequence of the CAD process. The prosthesis teeth 66 are positioned in the milling body 51 such that they are completely contained within the area of ​​the insert elements 57 made of the same material. 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. Furthermore, 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 the side walls 54 of the recess 54 exert pressure on the side walls 55 of the insert element 57, thereby securing the insert element 57 in the recess 53 of the milling body 51. Alternatively, the insert element 57 can be embedded in the recess 53 using an embedding material (not shown) to secure it in the milling body 51.

[0140] 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 generated 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 57. For this purpose, a surface is created in the surface 56 and the insert 57 using the virtual CAD model. This surface corresponds to the connecting surface between the material of the insert 57 and the material of the solid body 52 on the one hand, and the cured plastic material to be produced from the fluid polymerizable resin according to the specifications of the virtual CAD model on the other. The oral surfaces 69 of the surfaces that will later consist of the cured plastic material are thus machined out of the solid body 52 as a negative mold 81 using the subtractive CAM device.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 denture base 72. The surface thus produced is shown in the schematic view on the top side of the milled body 51. Fig. 8 is clearly visible. The connecting surface between the denture teeth 66 and the denture base 72 corresponds in Fig. 8 of the surface formed by the insert element 57, which are part of the prosthetic teeth 66 and which are in Fig. 8 are already marked as prosthetic teeth 66. In this connecting surface of the prosthetic teeth 66 are recesses 67 into which the fluid polymerizable plastic is filled for a more stable connection.

[0141] Additionally, a mark can be created on a circumferential wall 58. The newly created surface can then be cleaned. Afterwards, a Fig. 8 shown cavity 54 (analogous) Fig. 1) Fill or pack with the fluid polymerizable resin up to the mark. The fluid polymerizable resin 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 resin material from which the denture base 72 is manufactured.

[0142] After hardening, the intermediate product thus obtained 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 manufactured from the intermediate product according to the virtual CAD model of the dental prosthesis 82. Fig. Figure 9 shows a schematic view of the basal side 70 of the dental prosthesis 82 after subtractive machining from the polymerized hardened 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. Fig. Figure 10 shows the dental prosthesis 82 detached from the surrounding wall 58. For final completion, cleaning, polishing and / or surface treatment of the dental prosthesis 82 can be carried out as post-processing.

[0143] The following is an example procedure based on the one associated with the Fig. The intermediate and final products shown in sections 2 to 5 are explained. The process of the exemplary procedure is described in Fig. 11 is shown as a flowchart.

[0144] In the first step, a virtual three-dimensional model of the dental prosthesis to be produced is calculated using CAD. The virtual three-dimensional model of the dental prosthesis may include a support structure, but this is not mandatory.

[0145] In a subsequent second step (101), the virtual three-dimensional model of the dental prosthesis is calculated, for example by file splitting, into a tooth component as a virtual three-dimensional model of at least one prosthetic tooth (26) and a prosthetic base component 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 includes such a support structure.

[0146] In an optional third step 102, a physical support structure can be created based on the virtual three-dimensional model of the support structure, or the physical support structure can be manufactured analogously and then scanned to generate a virtual three-dimensional model of the support structure, whereby the surface of the virtual three-dimensional model of at least one prosthetic tooth 26 is modified with the virtual three-dimensional model of the support structure. Similarly, the virtual three-dimensional model of the prosthetic base can also be adapted with the virtual three-dimensional model of the support structure. This third step 102 is only performed if the dental prosthesis to be produced is to have a support structure.

[0147] In a fourth step 103, a connection surface is calculated in the virtual three-dimensional model between the at least one prosthetic tooth 26 and the prosthesis base, or between the at least one prosthetic tooth 26 and a support structure for positioning the carrier structure on the one hand, and between the prosthesis base and the carrier structure of the dental prosthesis on the other. Furthermore, the surface to be produced in a milling body 11, comprising the connection surface (possibly with the support structure and, if necessary, with a separate retention structure for the support structure, for example, in the form of projecting ridges, for attaching the carrier structure), is calculated using CAD methods. The position and orientation of the at least one prosthetic tooth in the milling body are determined in this process.

[0148] In a fifth step 104, an insert element 17 or several insert elements 17 are selected whose shape and volume, when appropriately positioned, are capable of fully accommodating the prosthetic teeth 26, optionally with an offset. From available insert elements 17, those insert elements 17 can be selected for which the least material loss is expected due to their shape and volume. An insert element selection module of a device according to the invention can be used to implement a method according to the invention. This can be achieved by appropriate computer programming.

[0149] 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 is produced (see Fig.6) selected from a database. The database contains several existing milling bodies 1, 11, 31, 51, each with an identifier and the position, orientation, and shape of at least one recess 3, 13, 33, 53 in the respective milling body 1, 11, 31, 51. The position and orientation of the insert elements 17 relative to each other can also be decisive in the selection process. If no milling body 11, 31 with suitable 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. A milling body provisioning module of a device according to the invention can be used to implement a method according to the invention for selecting or producing the suitable milling body 11, 31. This can also be achieved by suitable computer programming.If a new milling body with at least one recess is manufactured, the shape and position of the at least one recess, together with an identifier of the milling body, can be stored in the database so that this new milling body is available for future selections.

[0150] In a seventh work step 106, the selected at least one insert element 17 is attached 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 securing 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.

[0151] In an eighth work step 107, the selected milling body 11 with at least one insert element 17 attached therein is fixed in a CAM device.

[0152] Based on the virtual models generated in the second and fourth, and possibly also the third, steps, the surface to be produced is manufactured in a ninth step 108 using a subtractive CAM process in a milling body surface 16 in the milling body 11 and in the insert element 17 and, if applicable, in the investment material 22. The connecting surface or at least one prosthetic tooth is produced using the CAM process. This may result in a cavity in the surface 16 of the milling body 11.

[0153] In an optional tenth step 109, the support structure produced analogously or using CAM methods can be attached to the machined surface of the milling body 17 or fixed there.

[0154] In a preferred eleventh step 110, a fluid polymerizable plastic is filled or stuffed into the cavity.

[0155] In a preferred twelfth step 111, the fluid polymerizable plastic is cured or partially cured, thus creating a firm bond between the processed at least one insert element and the polymerizable plastic and, if applicable, the support structure.

[0156] In a preferred thirteenth step 112, the dental prosthesis is subtractively machined from the composite created in the twelfth step 111.

[0157] Optionally, in a fourteenth step 113, the dental prosthesis can then undergo post-hardening or final hardening.

[0158] In an optional fifteenth step 114, final processing of the dental prosthesis can take place, for example by surface treatment and / or polishing of the dental prosthesis.

[0159] Preferred work steps 110, 111, 112 (the eleventh, twelfth and thirteenth work steps) are only carried out if a dental prosthesis is to be manufactured directly from the denture teeth).

[0160] The features of the invention disclosed in the preceding description, as well as in the claims, figures and embodiments, can be essential for the realization of the invention in its various embodiments, both individually and in any combination. List of reference symbols 1, 11, 31, 51 milling bodies 2, 12, 32, 52 full bodies 3, 13, 33, 53 In-depth study 4.54 cavity 6, 16, 36, 56 surface 7, 17, 37, 57 Insert element 8.58 wall 9 Mark 10, 20, 40, 60 bracket 14, 34, 54 Side wall of the recess 15, 35 Bottom of the depression 18, 38, 55 Side wall of the insert element 22 Embedding material 24 connection surfaces 26, 66 Prosthetic tooth 59 Subpage 61 Top 67 Exclusion 68 Occlusal surface 69 Oral surface 70 Basal surface 71 Top 72 Prosthetic base 81 Negative form 82 dental prostheses Step 100: Calculation of a virtual 3D model of a dental prosthesis Step 101: Calculation of virtual 3D models of prosthetic teeth and prosthetic base, possibly with support structure 102 Optional step: Manufacturing a support structure and, if necessary, creating a virtual 3D model of the support structure Step 103: Calculation of the surface to be produced in a milling body, including the connection surface, using CAD methods Step 104: Selecting at least one insert element that matches the virtual 3D model Step 105: Selecting a milling cutter body with a suitable recess for at least one selected insert element. Step 106: Attaching at least one insert element in at least one recess of the milling body Step 107: Mounting the milling body in a CAM fixture Step 108: Creating the joining surface and a cavity in the milling body and the at least one insert element using a subtractive CAM process. 109 Optional step: Attaching or securing the support structure to the machined milling body 110 Preferred work step: Filling fluid polymerizable plastic into the cavity in the milling body 111 Preferred step: Curing of the fluid polymerizable plastic 112 Preferred work step: Subtractive fabrication of the dental prosthesis using CAM methods 113 Optional step: Post-curing or final curing of the dental prosthesis 114 Optional step: Final processing of the dental prosthesis

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), the method comprising 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) fastening the at least one insert element (7, 17, 37, 57) in the at least one recess (3, 13, 33, 53) by embedding, by polymerizing or by 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 bythat in step G) when machining 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 by 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 by 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 bythat 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 by that the selection of the at least one insert element (7, 17, 37, 57) is made with regard to the colour, 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 by that in step B) the selection of the at least one insert element (7, 17, 37, 57) is additionally carried out as a function of an individually determined colour selection and / or colour selection computer-assisted by colour matching. [8] Method according to one of the preceding claims, characterized bythat after step C2) an electronic storage of the shape of the at least one depression (3, 13, 33, 53) produced in step C2) together with an identifier of the milling body (1, 11, 31, 51) takes place, so that in subsequent processes the milling body (1, 11, 31, 51) with the depression (3, 13, 33, 53) produced in step C2) is available as a selectable milling body (1, 11, 31, 51) in the context of a step C1). [9] Method according to one of the preceding claims, characterized by 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] Method according to claim 9, characterized by that the wax is removed in step H) 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 by 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 by 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 by 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 bythat 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 by 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 by 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] Method according to claim 16, characterized by that the groups of adjacent prosthetic teeth (26, 66) are grouped into groups of molar prosthetic teeth and of incisor prosthetic teeth and canine prosthetic teeth or of molar prosthetic teeth, of incisor prosthetic teeth and of canine prosthetic teeth. [18] Method according to one of the preceding claims, characterized by that the procedure for implementing step G) involves 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 produced from the cured plastic material and the material of the at least one insert element (7, 17, 37, 57) connected thereto is subtractively worked out. [19] Method according to claim 18, characterized bythat 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 by 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 byin 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] Device for implementing a method according to one of claims 1 to 21, characterized bythat 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 recess (3, 13, 33, 53) is selectable, so that the at least one selected insert element (7, 17, 37, 57) can be inserted in a fit into the at least one recess (3, 13, 33, 53),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) with a fit.

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