WO2016079071A1

WO2016079071A1 - Method for creating a digital articulator

Info

Publication number: WO2016079071A1
Application number: PCT/EP2015/076721
Authority: WO
Inventors: Franz Xaver Wack
Original assignee: Franz Xaver Wack
Priority date: 2014-11-17
Filing date: 2015-11-16
Publication date: 2016-05-26
Also published as: DE102015208882A1

Abstract

The invention relates to a method for creating an individualized digital articulator of a person, comprising the following steps: creating a digital volume tomogram of the middle face and the lower face of the person by means of an x-ray device and transferring the first data set thus obtained to a computer unit; creating an intraoral scan of the upper-jaw teeth and the lower-jaw teeth of the person by means of an intraoral scanning camera and transferring the second data set thus obtained to the computer unit; digitally pantographically recording the joint path of the person and transferring the third data set thus obtained to the computer unit; and using the first data set, the second data set, and the third data set to create the digital articulator by means of a computer program.

Description

Method of creating a digital articulator

description

The invention relates to a method for creating a digital articulator. Furthermore, the invention relates to a system for carrying out the method.

A known method for producing and inserting a dental prosthesis, such as, for example, veneers into a dentition of a person, proceeds as follows: First, the upper jaw and the lower jaw, in particular the teeth, are molded by means of an impression jig. Thereafter, models of the upper jaw and lower jaw made of gypsum from a dental technician, who usually sits not in the dental office, made. In a further step, the lower jaw movement and lower jaw relation to the upper jaw in the dental practice is determined, for example by means of an arbitrary facebow and a bite registration. The models are inserted by the dental technician in an articulator, whereby their connection is made so that the determined lower jaw movement can take place and the bite registration is correct. At the point in question of the dentition of the person to whom a veneer is to be attached, a model of the veneer is waxed in the model in the articulator. The wax model of the veneer is then scanned, for example, and the data obtained is used to produce the insertable veneer with the exact same dimensions as the wax model from a blank. After the dental technician has made the veneer, this must be brought back to the dental office - for example, by courier. There, the person is summoned to a new appointment, in which this person the veneer is glued to the intended location of the dentition. Since elaborate plaster models of a mostly not in the dental office This procedure takes a very long time and the person must be summoned to the dental office for at least two appointments.

In addition, long-term studies of functionalities of such dentures as well as the influence of dentures, e.g. on other teeth or bones, be desired. In order to facilitate such examinations without having to expose the person several times to the radiation of X-ray images, US 2014/0294273 A1 has proposed a digitized method for designing a dental application. Here, a model of the maxillary teeth and a model of the mandibular teeth of the person from a deformation material, e.g. Plaster, formed. An optical camera then scans the plaster models everywhere to make the 3D images of the models ("3D Digital Mode") Positioning of the positions of the teeth of the person and the corresponding positions of the teeth on the plaster models is positioned on the reference plane of the facial skeleton and the resulting digital data is now changed with a computer program to simulate, for example, the possible effects of the dental application on other teeth It remains imperative to create the plaster models, so that the associated time or cost is inevitable.

Against this background, it is an object of the present invention according to claim 1 to provide a method for creating an individual, digital articulator, which can effectively and reliably represent and simulate the teeth or TMJ movements.

This object is achieved according to a first aspect of the invention by a A method for producing a digital articulator comprising the following steps: A method for the integrated production of dental prostheses for a person consisting of: creating a digital volume tomogram of the midface and the lower face of the person by means of an X-ray device and transferring the first data set thus obtained to a computer unit; Creation of an intraoral scan of the maxillary teeth and the mandibular teeth of the person by means of an intraoral scanning camera and transmission of the second data set thus obtained to the computer unit; digital pantographic recording of the person's trajectory and transmission of the third data record thereby obtained to the computer unit; and using the first data set, the second data set and the third data set to create the digital articulator by means of a computer program.

According to the invention, both a digital volume tomogram of the person's midface and lower face and an intraoral scan of the person's maxillary and mandibular teeth as well as digital pantographic recording of the subject's lane can be created as digital files and combined with each other by a computer program to form a fully digital articulator to create. In particular, in the combination of an intraoral scan of the maxillary and mandibular teeth of the subject with a digital volume tomogram, the technical bias is overcome that of two-dimensional image files (preferably an STL or XML data set) due to limitations in positioning an intraoral camera limited parts of maxillary and mandibular teeth, no 3D model can be built with sufficient accuracy. Thus, according to the invention, a digital volume tomogram (preferably a DICOM data set) with a usually lower resolution (eg with a voxel size of 100/1000 mm) with an intraoral scan of the maxillary teeth and the mandibular teeth with a higher resolution (eg with a pixel size of 19 / 1000 mm), so that a resulting 3D Model that fully represents the midface and the lower face, so that the movement of the teeth and joints can be fully simulated by the pantographic record of the joint track, and at the same time precisely shows the current, detailed position of the maxillary and mandibular teeth. The latter information may be essential, in particular, for the manufacture of dental prostheses, in particular a veneer or one or more crowns, in order to create a perfectly fitting denture, by the creation of an intraoral scan of the person's maxillary and mandibular teeth by means of an intraoral scanning camera and transmission the thus obtained third data set to the computer unit, for example, the prepared tooth stumps even more accurate - here with 19/1000 mm - can be detected. Thus, you can save the patient the most unpleasant impression and dispensed with the elaborate preparation of working models of plaster, etc. completely.

Furthermore, the current dental situation of the person, e.g. of temporomandibular joints or teeth in a dental treatment, e.g. the preparation of the denture and the insertion of the denture (such as a veneer) are included in a dentition of the person by e.g. using these currently created files the dentures is also currently produced.

In summary, in that all steps of obtaining the data sets required for the production of a dental prosthesis are done digitally, it is possible, without having to create an analogous model by a dental technician, to immediately manufacture the dentures in the dental practice, if the dental practice has the necessary infrastructure (eg a milling machine) has. The time delay incurred so far by interposing the model creation by the dental technician thus eliminated and the dentures can be directly glued to the person in an appointment with a short wait. The inventive method can thus be carried out both faster and cheaper than the previous method. The digital articulator, which is created by the method according to the invention, but can also be used for various other purposes, such as research and development of a dental prosthesis.

When using the first data record, the second data record and the third data record to create the digital articulator, the data of the first data record are preferably brought into the correct relation on the basis of the performed imaging method by means of the digital volume tomogram with measured individual temporomandibular joint data , this is realized by the application of person-specific, anatomical conditions. It can be explained more concretely that the corner points of the Bonwill triangle and the condylar path inclination can be represented and measured simply by means of the digital volume tomogram by rotation of the sagittal section plane.

An advantageous development of the invention provides that bringing into the correct relation of first data set and third data set by the definition of the Frankfurt horizontal or other anatomical crankshaft individual dimension of the patient on the basis of the first data set in relation to the recorded data of the lower jaw movement of the third record is done. Only the digital volume tomogram can easily represent and measure the corner points of the Bonwill triangle and the condylar path inclination by turning the sagittal section plane. By tilting the horizontal plane on the two condyles and the lower incision, the Bonwill triangle is shown from an axial viewpoint, whereby the actual basis, the individual Interkondylardistanz of the patient becomes readable. Only the Benett angle can not be raised by the digital volume tomogram, this is recorded in the third record, the pantography. This makes it possible, the complete jaw-related transmission not arbitrary approximated with face bow but 1: 1 exactly the To transfer hinge axis / intercondylar distance of the patient's two individual temporomandibular joints to the virtual articulator of the design software.

A further advantageous development of the invention provides that, as a further step before the creation of the digital articulator, a digital acquisition of the face by static records and the dynamic movements by means of a face scanner and transmission of the fourth data set obtained thereby to the computer unit. The detection of the face by the face scan takes place both statically and dynamically. Thus, one can consider the aesthetic conditions for example in the length design of the anterior teeth when introducing soft tissue ratios, smile lines, lip dynamics, etc. in the middle and lower face individually.

The creation of the digital articulator preferably takes place in that the second and / or third and / or fourth data record is superimposed onto the first data record using the computer program specialized for data record transfer. In this case, the second and / or third and / or fourth data record can be superimposed on the first data record in that at least three anatomically identical points of the first data record and the second and / or third and / or fourth data record are superimposed.

After the digital articulator has been created, as a further step, dentures can be made in a denture of a person, in particular a veneer, which preferably takes place as follows: Calculation of the shape of the denture and the location in the dentition of the person to which the dentures are applied should, from the data of the digital articulator as a fifth data set and transmission of the fifth data set to a manufacturing device; and manufacturing the denture in the manufacturing device from a blank by means of the data of the fifth data set. A further advantageous development of the invention provides that the three-dimensional bone and tooth ratios of the person are determined during the creation of the digital volume tomogram. This can be done together with the pantograph data more accurate determination of the required shape of the denture, as if, for example, only the tooth conditions by an impression by means of impression material - as is done in the prior art - are determined.

A further advantageous development of the invention provides that the first data record is a DICOM data record and / or the third data record is an STL or XML data record and / or the second data record is an STL data record and / or the fourth data record is an OBJ data record is. As a result, standard devices can be used to create the records and the resulting records can be used within a standard software for a digital articulator.

A further advantageous development of the invention provides that in the digital pantographic recording at least one of the following measured values are measured: maxillary HCI angle, horizontal condylar path inclination, Benett angle, Posselt triangle, individual anterior guidance. Based on these measurements, a reliable creation of the digital articulator is possible.

A further advantageous embodiment of the invention provides that in the digital detection of the face, the static recordings include a face photograph and / or a profile photo and / or a smile photo and / or wherein in the digital detection of the face, the dynamic movements recording a mimic action and / or an opening of the mouth and / or a laughing process. Based on these values, an ideal setting of the virtual model in the digital articulator is possible. A further advantageous embodiment of the invention provides that the digital articulator contains the data for the individual values of the person and its anatomical hinge axis. Thus, the dentures can be even better adapted to the circumstances of the person, since not only the static values - such as teeth clenched - - flow, but also the dynamic values eg when chewing.

A further advantageous embodiment of the invention provides that an insertion of the denture takes place in the person by sticking at the predetermined location on the dentition of the person. This step can be done immediately after the preparation of the denture on site, so that no further appointment with the dentist is necessary.

A further advantageous development of the invention provides that between the steps of the production of the dental prosthesis and the insertion of the dental prosthesis, the dental prosthesis is fired in a zirconia furnace. As a result, special zirconium restorations can also be carried out.

A further advantageous embodiment of the invention provides that all data of the person are transferred to a tablet computer and there the teeth and the veneer are displayed in selectable states. With this, the person can still be visualized on the dental chair, as the denture with the glued veneer will look like.

A further advantageous embodiment of the invention provides that a milling machine, preferably a five-axis milling machine is used as a manufacturing device for the production of the dental prosthesis. Such milling machines are reliable and can easily produce all kinds of dentures and veneers or crowns.

As a second aspect of the invention, a system for carrying out the above The method according to claim 1, comprising a plurality of specialized functions performing units in data communication with each other for transmitting data to be transferred between the units according to the method of manufacturing dentures. Such a system can be set up eg in a fully digital dental practice.

Further advantages and details of the invention are explained purely by way of example, without limitation of generality, with reference to specific dental prostheses, namely a veneer, and a special method of production, namely milling, with reference to an exemplary embodiment. The invention is analogous to the production of other types of dentures and use of all applicable in the art applicable manufacturing methods applicable.

A digital volume tomogram of the middle and lower face is created by the person to whom a veneer is to be adhered to the dentition; The three-dimensional bone and tooth conditions of the person are recorded. For this creation, for example, the device ORTHOPANTOMOGRAPH OP300 of the manufacturer KaVo Dental GmbH is used. The first record thus obtained is in a DICOM format. DICOM stands for Digital Imaging and Communications in Medicine and is a standard format for medical data. The first data record is transmitted by means of known transmission methods - for example wirelessly via WLAN or Bluetooth or wired via a USB interface - to a computer unit and stored there and can be used by means of a - for example - Dicom viewer in the design software.

There is also a digital measurement of the joint track by pantographic recording. For this purpose, for example, the jaw registration system JMA system of the manufacturer zebris Medical GmbH is used. All information is obtained - such as the upper jaw HCI angle, the horizontal one Condyle path inclination, Bennett angle, Posselt's triangle, and custom anterior guidance - to determine the settings for a digital articulator. This happens in a given measurement sequence - such as by lower jaw movements such as protrusion and laterotrusion. A third record in STL or XML format is obtained. Also, the third record is - as the first record - transmitted by known transmission paths to the computer unit and stored there.

In addition, the oral situation can be determined by means of an intraoral scan of the maxillary and mandibular teeth. This is done by means of a suitable scan camera, for example the CEREC Omnicam from the manufacturer Sirona Dental GmbH. In this case, a second data record is obtained in an STL or XML format. STL stands for STereoüthography. Also, the second record is - like the other two records - transmitted by known transmission paths to the computer unit and stored there. As a result, an even more accurate representation of the preparation margins of the tooth stumps, the interdental contacts, etc. is possible.

Furthermore, a digital acquisition of the face can be performed. This provides that by means of the face scanner both the static states - for example by a face photograph, a frontal photo or a smile photo - and the dynamic states - for example, the facial expressions, an opening process of the mouth or a laughing process - recorded and recorded. This is done by means of a known from the prior art face scanner, such as the model FACE HUNTER ZIRKONZAHN GmbH. On the basis of the values obtained, an individual adjustment of the virtual model into the digital articulator is possible. A fourth record in an OBJ format is obtained. OBJ stands for "object" and is a file format for the description of geometric objects.The fourth data set is - as the other three records - by means of known Transfer paths to the computer unit and stored there. Thus, an even more accurate and, inter alia, more aesthetic individual design (for example, the length of the anterior teeth) of the dentures is possible.

The order of the aforementioned three compellingly necessary for the realization of the invention steps of the creation of the volume tomogram, the creation of the intraoral scan and the pantographic recording of the joint track and the other for the realization of the invention only optionally possible step and the creation of the facial scan can in any order respectively. They are performed regularly one after the other as long as the person is in the dental office.

According to the invention, the measured individual temporomandibular joint data of the same person must be placed in the correct relation to the virtual person who is obtained from the above-described data records after the imaging measures (digital volume tomogram). This can be realized by the application of person-specific, anatomical conditions. Thus, for example, the Frankfurt horizontal and the individual Interkondylarachse can be clearly defined as the actual reference basis based on the recording of the digital volume tomogram and brought after introduction of the scan data of the individual jaw the recorded data of the lower jaw movements of the third record of pantographischen record the aforementioned data of the digital volume tomogram in relation by taking the record of the first record (Dicom record) as well as the third record (STL or XML record) of the pantography - the articular record; Here: zebris JMA - Kiefergelenk- and Unterkiefervermesser - in the interface of a designated design software - here: exocad DentalCAD, the company exocad GmbH - brings and this with a so-called "matching" - this is the superimposition or the juxtaposition of records for Fine-tuning or matching - correlated with each other and thus coordinated with each other. This allows the lower jaw to be virtually separated from the skull. Because the lower jaw movements are unambiguous through the pantograph record (third record), the virtual mandible can be moved by the second record (zebris record) exactly as on the living person.

As a result, it is no longer necessary to have a physically existing articulator created by a dental technician. Thus, the cost of materials is reduced and - more importantly - the time required to create the articulator considerably shortened. In addition, the digital articulator has all individual values of the person including their anatomical hinge axis.

In contrast to the previous procedure in a physical articulator, in which a wax model of the veneer is waxed at the point at which the veneer is to be glued to the denture later, which then leads to the ceramic veneer by means of complicated procedures, can in the inventive Method, the shape of the veneer directly on the screen, for example by means of the above-mentioned design software exocad DentalCAD, set and the resulting fifth dataset are used for the production of the ceramic veneer. This fifth data set is transferred by means of known transmission methods - wirelessly or by cable - to a five-axis milling machine, for example the model inLab MC X5 from the manufacturer Sirona Dental GmbH. The milling and grinding process, as known from the prior art, by machining a selected blank - for example, a ceramic zirconia. In this case, the data of the fifth data record is used.

This saves an enormous amount of time compared to the method of the prior art, since, inter alia, no dental technician outside the dental practice must be consulted. The manufacture of the ceramic veneer can be done immediately after fixing the shape of the Veneers begin.

After a short time, the veneer is ready and can be immediately glued into the dentition of the person.

Since all devices required for carrying out the method according to the invention can be used or set up easily in the dental practice with practice-own laboratories, everything can be carried out in a continuous workflow - ie everything bundled under one roof - and the person does not yet have to paste the veneer Once at a later date - after the dental technician has made the veneer and sent it to the dental office - come to the dental office.

Another advantage of the method according to the invention is that the person can be shown on the screen before creating the veneer, as the veneer looks in the dented state in the dentition. All that is required is to transfer all the data of the person obtained from the first, second, third and optionally fourth data sets and additionally the fifth data set representing the veneer to a tablet computer. There, the dentition and the veneer can then be displayed in selectable states. The person can then stop this production even before the transmission of the fifth data set to the milling machine and the beginning of the production of the veneer, if he does not like the virtual result displayed on the tablet computer. A new fifth record can then be created that results in a different shape of the veneer. This result can then be shown to the person again on the tablet computer. This process can be repeated until the person is satisfied with the result presented - there is then no "rude awakening" when the veneer is glued in and the overall impression of the dentition does not match the person's imagination.

In the method according to the invention CAI (Computer Aided Imaging) comprising means for a digital volume tomogram, for an intraoral scan and for pantograph recording - in the creation of first, second, and third and optionally fourth record -, computer aided design (CAD) - when creating the fifth record - and CAM (Computer Aided Manufacturing) - when milling the veneer - together. The equipment required for this purpose, including computer programs and storage for the data obtained, can all be readily available in the dental practice, so that no additional time is required due to the involvement of a foreign dental technician laboratory Such a system according to the invention, ie a fully digital dental practice with an individual articulator, and a fully digitized workflow to be realized thereby The data, which are respectively generated by a component of the system, can in the context of fully digitized workflow from one component of the system to another component without Further, for example, the design of a dental prosthesis by means of CAD on the basis of the digital articulator, which is created from CAI generated data, can be made in order to then produce the tooth replacement by means of CAM He goes to the dentist and, immediately after taking his data and creating the data for the veneer, he glues the veneer made in the dental office.

In summary, it can be said that by means of the method according to the invention an absolutely true person-specific articulator is obtained, which can be termed a purely personal individual, true virtual, model-free articulator. This means that the digital - or virtual - articulator is created without already having an arbitrary, the personal person-hinge axis only approximated face bow. No articulated, scanned-in models are needed and there are STL or XML data sets that are incorporated into design software, such as the Exocad program. It is no longer necessary - but even contraindicated - an analogue articulator to use, since this would be far too imprecise in its movements compared to the digital articulator according to the invention, even with the most precise programming by an analog or digital pantography.

The invention thus enables a "fully digitalized dental practice" with a digital workflow in an interdisciplinary treatment concept.The inventor has thus realized that digital networking of digital single dental devices by means of communicating interfaces within a single dental practice or spatially separate cooperating dental / dental units That is, a completely digital workflow for a dental-functional technical / therapeutic and / or prosthetic care of a patient can be realized.

With the invention advantages of technology are used, facilitating the daily routines and, above all, increases the speed with which patients are spared many hours of practice. The technical advantage allows the practice to serve more patients and to go short distances with exceptional results and to ensure the utilization of their own laboratory.

The purpose is, among others:

Reduction of dental patient times at the treatment chair, associated with the reduction of physical disabilities of the patient,

Reduction of personnel and manufacturing operations,

Material savings,

Reproducibility 1: 1 without re-treatment on Dental chair.

Proposed is the networking of all of a dental scientifically recognized, functionally and aesthetically-oriented digital workflow necessary individual devices for enabling a fully digital anatomy and functionally accurate dental practice.

In this context, but also independently of this, the invention makes it possible to provide a method for using an electronic technique (CAI-CAD-CAM) for producing a patient-specific, functionally and anatomically exact prosthesis by means of an electronically-based articulator.

In this context, but also independently of this, the invention also makes it possible to provide a virtual electronic patient-specific articulator, which is also referred to below as the "individual virtual articulator", in short "IVA".

General description / differences of the IVA to the existing articulators

Differences to already known so-called virtual articulators and the analog articulators include the following:

The individual articulator, the patient's own and accurate anatomy and function of the teeth and jaws can be adjusted individually in the virtual articulator, this can not to date all the above articulators, usually had to fulfill the requirement for high quality, etc. in the field of dentistry Under functionally oriented aspects then mostly still with plaster models in the similar articulator or these then scanned into the so-called virtual articulator, which are however only approximately at anatomical and functional structures of the patient, worked become.

The invention provides an absolutely true patient-specific articulator, which can also be designated as a purely patient-specific genuine virtual or digital plaster model-free articulator. The IVA according to the invention is distinguished by the fact that none with an arbitrary - i. The individual patient hinge axis only needs to be scanned in to approximated facebow models and inserted into the Exocad software as an STL or XML dataset. According to the invention, it is no longer necessary, but even contraindicated, to use an analogue or spurious virtual articulator, since this would be far too imprecise in the movement sequences, even with the most precise programming by means of an analogue or digital pantography.

It should also be mentioned again for clarification that a dental technician with the Individual Virtual Articulator will in future no longer need a plaster model in the laboratory and no analogue patient impressions from the mouth in order to produce high-quality functional and anatomical dentures that exactly match the patient's conditions.

The disadvantages of the method with the previous analog or spurious virtual articulator are the inaccurate and indirect determination of the anatomical and functional data as well as in particular the generally missing adjustment of the necessary anatomical and functional parameters. In particular, all previously existing analog and spurious virtual articulator systems dictate the averaged or approximated intercondylar distance, which does not correspond to the anatomical reality of the individual patient or, i.a. reveal no pathologically altered anatomical structures.

Exemplary description of the IVA

The digital volume tomogram (DVT) is an X-ray spatial, ie 3D rendering, of the patient-specific anatomy, such as temporomandibular joint anatomy and bone anatomy and position, with a current voxel size of about 100 ym = 100/1000 mm.

The temporomandibular joint anatomy may also show an arthritic change in the condyle and yet this condyle may be in the correct centric position.

By means of the DVT, a measurement of the intercondylar distance is possible by means of the radiographic reproduction of the condylar position in the patient-specific 3D space. The condyluscorpusräumliche center is the reference point.

Preferably, the CBCT should be at maximum maximum point contact of both jaws when created. This is realized by the so-called "habitual maximum intercuspidation", that is a slightly open jaw retention would not be value-altering until about 2mm since the condyles are still in pure rotation at the initial mouth opening.

In a functional recording of the lower jaw movements, the spatial patient-specific movement of the lower jaw, e.g. the transverse condylar path inclination or latero- / protrusion, as well as the mouth opening shown.

Thus, one could virtually separate the mandible from the skull, because the lower jaw movements are unique by the pantograph record, this could be determined by means of e.g. Zebris recording to move exactly as on the living patient.

The models can be scanned using a digital scan camera, such as the Omnicam scan camera. The individual jaws can be molded in 1-2 minutes and at the same time as a 3D image on the monitor represent.

The facial presentation can be prepared by using a digital video camera in a short video or single photos to create an aesthetically matched dentures, the individual face conditions, e.g. Lips, smile line etc. of the patient can be displayed.

Required records for the IVA include:

1. Scan models with STL data set, e.g. Upper jaw lower jaw digital impression.

2. DVT with Dicom record, e.g. KaVo OP300.

3. Digital transmission of the static and above all dynamic movements of the mandible with STL data set, e.g. Zebris JMA. optional

4. Digital transmission of the facial structures for the aesthetic design of the denture with xml, obj data set, e.g. Syncc Camera Zebris.

The true patient-specific virtual articulator can be simulated by matching all 3 (and optionally 4) above-mentioned records and programming the individual movement of the mandible by software in 3D space, by, e.g. digital imaging techniques, e.g. a DVT with digital surveying techniques such. Zebris - pantographic facebow recorder by means of ultrasound transmitter / receiver - can be linked together.

For this purpose, the patient after the imaging measures (DVT) the measured individual temporomandibular joint data (zebris) of the same patient, which is referred to as "matching".

The matching can be done as follows:

Through the process of the mathematical algorithm, data can be brought into the resolution of the other by the transfer by means of algorithmic application, eg by using the program Aadva-Manager specialized for the transfer of data records with the application DICOM Viewer, which is activated from the software EXOCAD, DICOM data of ^DVT's, for example from KaVo software CliniView exported. Here, for example, the best fit adaptation is selected. Now one brings STL data, eg from the Omnicam scan data set (upper jaw scan) or the data set of the Zebrisunterkiefermodells, currently 20 ym as a surface model into the Dicomdaten spatially still inaccurate DVT voxel size, now 100 ym, by at least 3 anatomically exactly same points eg of the scan model with the exact same points of the DVT ^' s marked / equated.

Thus, the complete parameters of the patient-specific anatomy of his jaws, teeth and bone structures can be defined by the DVT recording and the recorded data of the lower jaw movements, for example from the functional registration system - here Zebrissystem - brought into relation by, among others, the data set of the DVT -Dicom data set eg exported from the KaVo software Cliniview, as well as the STL or XML data set eg the pantography - Gelenkbahnen recording or the maxilla coupling tray, which allows the maxillae assignment - here zebris JMA - into the interfaces (again Aadva manager , Dicom-Viewer, best fit), the designer software provided here - here Exocad - brings, and these with the so-called "matching" correlated and thus has matched exactly. The invention will be explained below with reference to the figures based on embodiments.

Fig. 1 shows schematically an inventively arranged system according to an embodiment.

2 schematically shows how, in one embodiment of a method according to the invention, a second data record is superimposed on a first data record.

Fig. 3 shows schematically how in the embodiment of FIG

2, a digital articulator can be created using a first data set, a second data set, a third data set.

Figure 2 shows in a perspective view of the upper jaw diagonally from below and from the inside of the mouth, as a second set of data from an intraoral scan of a person's maxillary teeth on a first data set, i. a digital volume tomogram of the person's midface can be superimposed. From the volume tomogram, the posterior sides of the teeth are visible along with tooth roots and bones. For example, four points of the scan model formed from the second data record can be equated with the anatomically exactly identical points of the digital volume tomogram for the overlay.

FIG. 3 shows on the left side an exemplary individualized SD model in a lateral view, which is formed by the overlay illustrated above. The model can then be correlated with digital pantographic recording of the articular and other values of the subject to simulate, for example, upper jaw movements relative to the lower jaw. On the right side of Figure 3 shows the upper jaw and the lower jaw of the 3D model when simulating the state in which the mouth is closed. It can be seen here that from the lower resolution digital volume tomogram, through the combination with a higher resolution intraoral scan, a 3D model can be provided which includes both the precise positions of all intraoral parts and relevant facial parts, such as teeth and teeth Bones or temporomandibular joints as well as the dental health status regarding, for example, malocclusions, tooth replacement or already existing dentures as well as possible movements of the intraoral parts and relevant facial parts in relation to each other (eg temporomandibular joint movement).

According to the first aspect, among others, the following items are provided:

1. A method for producing and inserting a veneer into a denture of a person with the following steps:

Creation of a digital volume tomogram of the middle face and the lower face of the person by means of an X-ray machine and transmission of the first data record thus obtained to a computer unit;

digital pantographic recording of the person's trajectory and transmission of the second data set thus obtained to the computer unit;

Use of the first data set and the second data set for creating a digital articulator by means of a computer program, wherein the data of the first data set by means of the performed imaging process by means of the digital volume tomogram with the measured individual temporomandibular joint data in the right relation, said by the Application of person-specific, anatomical conditions is realized; Calculating the shape of the veneer and the location in the dentition of the person to whom the veneer is to be applied, from the data of the digital articulator as the fifth data set, and transmitting the fifth data set to a milling machine; Milling the veneer in the milling machine from a blank by means of the data of the fifth record.

The method of item 1, wherein the bringing into the correct relation of the first data set and the second data set by the definition of the Frankfurt horizontal or other anatomical crankshaftzusammenzüglichen individual dimension of the patient on the basis of the first data set in relation to bring the recorded data of the lower jaw movement of the second data set ,

Method according to one of the preceding objects, wherein, as a further step prior to the creation of the digital articulator, an intraoral scan of the maxillary teeth and the mandibular teeth of the person takes place by means of an intraoral scanning camera and transmission of the thereby obtained third data set to the computer unit.

Method according to one of the preceding objects, wherein as a further step prior to the creation of the digital articulator, a digital detection of the face by static records and the dynamic movements by means of a face scanner and transmission of the fourth data set thereby obtained to the computer unit.

Method according to one of the preceding objects, wherein an insertion of the veneer takes place at the person by sticking to the predetermined location on the dentition of the person. The method of item 5, wherein between the steps of milling the veneer and inserting the veneer, the veneer is fired in a zirconia furnace. Method according to one of the preceding objects, wherein in the production of the digital volume tomogram the three-dimensional bone and tooth ratios of the person are determined. Method according to one of the preceding objects, wherein the first data record is a DICOM data record and / or the third data record is an STL or XML data record and / or the second data record is an STL data record and / or the fourth data record is an OBJ data record. Method according to one of the preceding objects, wherein in the digital pantographic recording at least one of the following measured values are measured: maxillary HCI angle, horizontal condylar path inclination, Benett angle, Posselt's triangle, individual anterior guidance. Method according to one of the preceding objects, wherein in the digital acquisition of the face the static recordings comprise a face photograph and / or a profile photo and / or a smile photo. Method according to one of the preceding objects, wherein in the digital detection of the face the dynamic movements comprise the recording of a facial action and / or an opening of the mouth and / or a laugh process. The method of any preceding item, wherein the digital articulator includes the data for the individual values of the subject and the anatomical hinge axis thereof. 13. The method according to any one of the preceding objects, wherein a five-axis milling machine is used as a milling machine.

14. A method according to any one of the preceding claims, wherein all data of the person is transferred to a tablet computer and there the denture and the veneer are presented in selectable states.

According to the second aspect, among others, the following items are provided:

Creation of an intraoral scan of the maxillary teeth and the mandibular teeth of the person by means of an intraoral scanning camera and transmission of the second data set thus obtained to the computer unit;

digital pantographic recording of the person's trajectory and transmission of the third data record thereby obtained to the computer unit;

digital acquisition of the face by static recordings and the dynamic movements by means of a face scanner and transmission of the fourth data record thereby obtained to the computer unit;

Use of the first data record, the second data record, the third data record and the fourth data record for creating a digital articulator by means of a computer program;

Calculation of the shape of the veneer and the location in the dentition of the Person to whom the veneer is to be attached, from the data of the digital articulator as the fifth data set and transfer of the fifth data set to a milling machine; Milling the veneer in the milling machine from a blank by means of the data of the fifth record;

Insert the veneer into the person by sticking it in place at the dentition of the person. The method of item 1, wherein between the steps of milling the veneer and inserting the veneer, the veneer is fired in a zirconia furnace. Method according to one of the preceding objects, wherein in the production of the digital volume tomogram the three-dimensional bone and tooth ratios of the person are determined. Method according to one of the preceding objects, wherein the first data record is a DICOM data record and / or the second data record is an STL data record and / or the third data record is an STL data record and / or the fourth data record is an OBJ data record. Method according to one of the preceding objects, wherein in the digital pantographic recording at least one of the following measured values are measured: maxillary HCI angle, horizontal condylar path inclination, Benett angle, Posselt's triangle, individual anterior guidance. Method according to one of the preceding objects, wherein in the digital acquisition of the face the static recordings comprise a face photograph and / or a profile photo and / or a smile photo. Method according to one of the preceding objects, wherein in the digital recording of the face, the dynamic movements include the recording of a mimic action and / or an opening of the mouth and / or a laugh process.

8. The method of any preceding item, wherein the digital articulator includes the data for the individual values of the subject and the anatomical hinge axis thereof.

9. The method according to any one of the preceding objects, wherein a five-axis milling machine is used as a milling machine.

10. The method of any one of the preceding claims, wherein all data of the person is transferred to a tablet computer and there the denture and the veneer are displayed in selectable states.

According to the third aspect, among others, the following items are provided:

1. A method for the integrated production of dental prostheses for a person consisting of:

A) transmission of a digital volume tomogram of the face of the person, including the lower jaw and upper jaw of the person, to a computer unit,

B) transmission of a digital pantographic recording of the person's joint path to the computer unit,

C) creating a digital articulator from steps A) and B) in the computer unit,

D) transmission of the digital data of the articulator to a manufacturing unit, and

E) Production of the denture by means of the production unit. Process for the preparation of dentures in a dentition of a person with the following steps:

Creation of a digital volume tomogram of the mid-face and a lower face of the person by means of a radiological imaging device, for example, such as an X-ray device, and transmission of the resulting first data set to a computer unit;

Using the first data set and the second data set for creating a digital articulator by means of a computer program, wherein the data of the first data set by means of the performed imaging process by means of the digital volume tomogram with the measured individual Kiefergelenk Lenks data in the right relation, this is realized by the application of person-specific, anatomical conditions;

Calculating the shape of the denture and the location in the dentition of the person to whom the denture is to be attached from the data of the digital articulator as a fifth data set and transferring the fifth data set to a manufacturing device;

Production of the denture in the manufacturing facility from a blank by means of the data of the fifth record.

Method according to item 2, wherein the bringing into the correct relation of first data set and second data set by the definition of the Frankfurt horizontal or other anatomical crankshaft personal dimension of the person based on the first data set in relation to bring the recorded data of the lower jaw movement of the second data set , Method according to one of the preceding objects, wherein, as a further step prior to the creation of the digital articulator, an intraoral scan of the maxillary teeth and the mandibular teeth of the person takes place by means of an intraoral scanning camera and transmission of the thereby obtained third data set to the computer unit.

Method according to one of the preceding objects, wherein as a further step prior to the creation of the digital articulator, a digital detection of the face by static records and / or the dynamic movements by means of a face scanner and transmission of the fourth data set thereby obtained to the computer unit.

Process for the preparation of dentures in a dentition of a person with the following steps:

Using at least one of the first data set, the second data set, the third data set and the fourth data set to create a digital articulator by means of a computer program; Calculating the shape of the denture and the location in the dentition of the person to whom the denture is to be attached from the data of the digital articulator as the fifth data set and transferring the fifth data set to a manufacturing unit;

7. The method according to any one of the preceding objects, wherein a single set of the dentures takes place in the person at the predetermined location on the dentition of the person.

8. The method of item 7, wherein the insertion of the dental prosthesis is done by sticking.

i ₅

9. A method according to item 7 or 8, wherein between the steps of producing the dental prosthesis and inserting the dental prosthesis, the dental prosthesis is fired in a zirconia oven.

10. The method according to any one of the preceding objects, wherein in the

Creation of the digital volume tomogram the three-dimensional bone and tooth conditions of the person are determined.

11. The method of any preceding item, wherein the first record includes a DICOM record and / or the third record

STL or XML record and / or the second record is an STL record and / or the fourth record is an OBJ record.

12. The method according to any one of the preceding subjects, wherein at least one of the following measured values are measured in the digital pantographic recording: maxillary HCI angle, horizontal condylar path inclination, Benett angle, Posselt's triangle, individual anterior guidance. 13. Method according to one of the preceding objects, wherein in the digital acquisition of the face the static recordings comprise a face photograph and / or a profile photo and / or a smile photo.

14. Method according to one of the preceding objects, wherein in the digital detection of the face the dynamic movements comprise the recording of a mimic action and / or an opening of the mouth and / or a laugh process.

15. The method of any preceding item, wherein the digital articulator includes the data for the individual values of the subject and the anatomical hinge axis thereof.

16. The method according to any preceding item, wherein all data of the person are transferred to a tablet computer and there the denture and the dentures are presented in selectable states.

17. A method according to any preceding item, wherein the dental prosthesis comprises a veneer, a crown, a bridge, a partial implant, a full implant, a prosthesis or a combination thereof. 18. The method according to any one of the preceding objects, wherein the preparation of the dental prosthesis by milling the denture from a blank and / or by sintering a blank, for example using a laser and / or made by 3D printing from a blank and / or grinding a blank becomes.

19. The method according to any one of the preceding objects, wherein a milling machine, preferably a five-axis milling machine is used as a manufacturing device for producing the dental prosthesis. Method according to one of the preceding objects, wherein the dental prosthesis is made of metal and / or of ceramic and / or of plastic. A system for performing the method of any one of the preceding articles, comprising a plurality of specialized functions performing units communicatively engageable with each other for communicating data to be transferred between the units according to the method of making dentures. A digital virtual articulator for use in the system of item 21 and in the method of any one of items 1 to 20.

Claims

claims

Method for creating an individualized digital articulator of a person with the following steps:

digital pantographic recording of the person's trajectory and transmission of the third data record thereby obtained to the computer unit; and

Use of the first data record, the second data record and the third data record for creating the digital articulator by means of a computer program.

Method according to claim 1, wherein the data of the first data set are brought into the correct relation by means of the digital volume tomogram with measured individual temporomandibular joint data, whereby the bringing into the correct relation is realized by the application of person-specific, anatomical conditions ,

The method of claim 2, wherein bringing the first set of data and the third set of data into correct relation by defining the Frankfurt horizontal or other anatomical, crankshaft individual dimension of the person using the first record is made in relation to the recorded data of the lower jaw movement of the third record.

Method according to one of the preceding claims, wherein as a further step prior to the creation of the digital articulator a digital detection of the face by static records and / or the dynamic movements by means of a face scanner and transmission of the fourth data set thereby obtained to the computer unit; and using further the fourth data set for creating the third articulator by means of the computer program.

Method according to one of the preceding claims, wherein the creation of the digital articulator takes place in that the second and / or third and / or fourth data record is superimposed onto the first data record using the computer program specialized for data record transfer.

Method according to claim 5, wherein the second and / or third and / or fourth data record is superimposed on the first data record by superposing at least three anatomically identical points of the first data record and the second and / or third and / or fourth data record.

Method according to one of the preceding claims, wherein in the preparation of the digital volume tomogram, the three-dimensional bone and tooth ratios of the person are determined.

Method according to one of the preceding claims, wherein the first data record is a DICOM data record and / or the second data record is an STL or XML data record and / or the third data record is an STL or XML data record and / or the fourth data record is an OBJ Record is.

9. Method according to one of the preceding claims, wherein in the digital pantographic recording at least one of the following measured values are measured: maxillary HCI angle, horizontal condylar path inclination, Benett angle, Posselt's triangle, individual anterior guidance.

10. The method according to any one of the preceding claims, wherein, when dependent on claim 4, in the digital detection of the face, the static recordings include a face photograph and / or a profile photo and / or a smile photo.

1 . Method according to one of the preceding claims, wherein, when dependent on claim 4, in the digital detection of the face, the dynamic movements comprise the recording of a mimic action and / or an opening of the mouth and / or a laugh process.

12. A method according to any one of the preceding claims, wherein the digital articulator contains the data for the individual values of the person and their anatomical hinge axis.

13. The method according to any one of the preceding claims, wherein the method comprises, as a further step, a production of dental prostheses, in particular a veneer, for a dentition of a person, which preferably takes place as follows:

Calculating the shape of the denture and the location in the dentition of the person to whom the denture is to be attached, from the data of the digital articulator as the fifth data set and transferring the fifth data set to a manufacturing facility; and

14. The method according to claim 13, wherein an insertion of the denture in the person takes place at the predetermined location on the dentition of the person. s 15. The method of claim 14, wherein the insertion of the dental prosthesis is done by sticking.

16. The method according to claim 14 or 15, wherein between the steps of the production of the dental prosthesis and the insertion of the dental prosthesis tooth replacement is fired in a zirconia.

17. The method according to any one of the claims 13 to 16, wherein all the data of the person are transferred to a tablet computer and there the teeth and the dentures are shown in selectable states i5.

18. The method according to any one of claims 13 to 17, wherein the dental prosthesis, a veneer, a partial crown, an inlay, a full crown, a bridge, a partial implant, a full implant, a prosthesis or a

₂₀ combination thereof. 9. Method according to one of the claims 3 to 18, wherein the production of the dental prosthesis by means of milling of the dental prosthesis from a blank or / and by sintering of a blank, for example

₂₅ ter use of a laser and / or by 3D printing from a

Blank or / and grinding a blank is made.

20. The method according to any one of the claims 13 to 19, wherein a milling machine, preferably a five-axis milling machine as Her¬

30 positioning device for the preparation of the denture is used.

21. The method according to any one of the claims 13 to 20, wherein the dental prosthesis made of metal and / or ceramic and / or plastic.

22. The method according to any one of the preceding claims, wherein the method is feasible without any physical model.

23. System for carrying out the method according to one of the preceding claims, comprising a plurality of specialized functions performing units, which are in communication with each other or can be brought, for the transmission of according to the method for the production of dental prostheses between the units to be transmitted data.