WO2014044783A2 - Procédé de simulation de l'occlusion dynamique - Google Patents

Procédé de simulation de l'occlusion dynamique Download PDF

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Publication number
WO2014044783A2
WO2014044783A2 PCT/EP2013/069533 EP2013069533W WO2014044783A2 WO 2014044783 A2 WO2014044783 A2 WO 2014044783A2 EP 2013069533 W EP2013069533 W EP 2013069533W WO 2014044783 A2 WO2014044783 A2 WO 2014044783A2
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WIPO (PCT)
Prior art keywords
data
patient
virtual
jaw
lower jaw
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PCT/EP2013/069533
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German (de)
English (en)
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WO2014044783A3 (fr
Inventor
Wajeeh Khan
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Ortho Caps Gmbh
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Publication of WO2014044783A2 publication Critical patent/WO2014044783A2/fr
Publication of WO2014044783A3 publication Critical patent/WO2014044783A3/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/004—Means or methods for taking digitized impressions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C19/00—Dental auxiliary appliances
    • A61C19/04—Measuring instruments specially adapted for dentistry
    • A61C19/045—Measuring instruments specially adapted for dentistry for recording mandibular movement, e.g. face bows
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C19/00—Dental auxiliary appliances
    • A61C19/04—Measuring instruments specially adapted for dentistry
    • A61C19/05—Measuring instruments specially adapted for dentistry for determining occlusion
    • A61C19/052—Measuring instruments specially adapted for dentistry for determining occlusion with tracing appliances

Definitions

  • the temporomandibular joint is one of the most important joints of the human or animal body, as both food intake and articulation are closely linked to the function of this joint. In humans, every word is determined by the interaction of the temporomandibular joint, tongue, tooth position, larynx and lungs.
  • CMD craniomandibular dysfunction
  • occlusion refers to all contacts between the teeth of the upper and lower jaw.
  • the contact points lie on the occlusal plane, which is not planar, but curved in sagittal and transversal planes.
  • the static occlusion is further differentiated from the dynamic occlusion. While in the static occlusion the tooth contacts are detected without movement of the lower jaw in intercuspidation, one speaks of dynamic occlusion of the tooth contacts due to the lower jaw movement.
  • the dynamic occlusion can in turn, depending on which teeth are considered, be converted into the dynamic see occlusion of the anterior guidance, canine guidance or - if there are several teeth group tooth guidance.
  • Another aspect is the precontact of the teeth, ie the premature contact of a tooth or a group of teeth during bite or lower jaw movements out of the occlusion, which can cause significant damage to the entire periodontium apparatus.
  • Articulators are devices for simulating jaw movement.
  • the plaster models of the dental arches of the upper and lower jaw are mounted in occlusion in the articulator. Subsequently, the movement of the jaws can be simulated to each other, which serves as a basis for making dentures, partial and full dentures or splints.
  • the transfer of the collected Axiographiekor in an articulator on the one hand and the production of plaster models of upper and lower jaw for attachment in an articulator on the other hand is time consuming, buggy and in terms of Zahnbögenmodelle and the articulators material-intensive and expensive.
  • the object of the present invention is therefore to provide a method which avoids the disadvantages described.
  • a method is to be provided in which it is possible to dispense with articulators. Therefore, the present invention also provides diagnostic methods that allow objective insight into the various components of the chewing organ and also enable the evaluation of functional overall procedures.
  • the present invention therefore relates to a method for simulating the dynamic occlusion between upper and lower jaw, comprising the following method steps:
  • V Simulation of the jaw movement to verify the dynamic occlusion based on the combination of the virtual dentition model and the virtual articulator.
  • the method has been able to virtually replace the real articulators for clarifying the dynamic occlusion with a digital imaging procedure.
  • the associated advantages are therefore obvious: Since the process is data-based, costs and material for a complex articulator are eliminated. In addition, the costs for the production of individual dental arch plaster models for assembly in the hospital are also eliminated Articulator, which in turn leads to a huge time savings.
  • Another advantage is the purely digital handling, which is less error-prone and easier to use, since the computer-aided method can be learned faster than dealing with the existing real articulator devices. Only the recording of the data, ie the production of bite marks on the one hand and the axiographic measurement of the temporomandibular joint on the other hand requires dental expertise.
  • step I) of the method 3D scan data are provided on the actual condition of the upper and lower jaw of a patient, so that a virtual dentition model of upper and lower jaw can be calculated.
  • the provision of the 3D scan data in step I) is based on the acquisition of data by means of an interoral scan or by means of a positive tooth model produced by means of an impression.
  • dental technicians first take an impression of the actual condition of the upper and lower jaw bows. From this impression, a model, preferably made of plaster, then made. Based on the model, 3D scan can be used to determine data and provide it for further processing in the method described herein.
  • step II) of the method axiographic data are provided for the lower jaw movement of patients. For this purpose traces of movement of the lower jaw are recorded, so that subsequently the individual hinge axis for the temporomandibular joints can be determined. In addition, the limit movements of the lower jaw are registered. Kinematic methods are used to collect the data. To capture this data, different axiography systems are known in practice. In one embodiment of the method, the provision of the axiographic data in step II) is based on electromechanically, opto-electronically and / or ultrasound-determined data. Table 1 gives an overview of the most commonly used electronic systems for the purposes of axial measurement and the associated type of measurement:
  • the data collected by the axiographic measurement is provided for further use in the method according to step II) of the method.
  • step III) of the method the data provided in step I) are transferred to a virtual dentition model.
  • the 3D scan data of the upper and lower jaw tooth arches which are, for example, as CAD files, read into a computer and transferred into a virtual upper and lower jaw model.
  • the axiography data is used, which is converted into a virtual anatomical articulator for simulating the jaw movement.
  • the resulting virtual articulator has setting options selected from the group consisting of: Bennett angle, joint inclination, terminal Schnarnierachse, anterior guidance, immidiate side shift and progressive side shift on.
  • all setting options can be simulated, which correspond to those of a real articulator. This is particularly advantageous as it allows the real articulator to be completely replaced without any limitation in the assessment of the occlusion.
  • the virtual articulator thus mean value articulators, partially adjustable articulators as well as full value articulators are equally replaced.
  • a simulation of the jaw movement for verifying the dynamic occlusion according to step V) of the method is thus virtually feasible.
  • special attention is paid to the dynamic occlusion on the basis of which a real articulator was previously unavoidable, whereas a denture model was sufficient for the assessment of the static occlusion.
  • the virtual articulator is a non-Arcon or Arcon articulator.
  • the structure of the virtual device is the same as in a man's jaw, so that the condyles are placed in the upper part of the articulator.
  • the virtual structure corresponds to the human anatomical conditions of the temporomandibular joint.
  • the arrangement has no effect on the functions of the virtual articulator, since the relative movement of the lower jaw to the upper jaw is the same in both technical approaches.
  • the transfer of the data in step III) and the combination in step IV) takes place via suitable program-controlled data interfaces.
  • suitable interfaces are held in accordance with the most common Axiographiesysteme to make the transfer of data as simple as possible.
  • the computer-controlled system used in the present method recognizes the individual formats and combines them into a digital set of dentition model and articulator. The resulting digital combination of dentition model and articulator is thus digitally imaged, so that one can also speak of a digital imaging method in the present method.
  • the calculation and modification in step VI) shows the iterative occlusion profile from the actual to the desired state.
  • the iterative approximation from the actual state to the desired state is advantageous, in particular for therapeutic applications, since the individual intermediate steps can thus be optimally imaged on the way to the desired state for the treating medical specialist in the case of functional disorders of the temporomandibular joint.
  • the number of iterative steps e.g. Plan occlusal rail therapies better and implement them in appropriate orthodontic splints.
  • the simulated jaw movement calculated and modified in step VI) is therefore provided in an additional step VII) for the calculation and production of a real denture, a partial denture, a total denture or an orthodontic appliance.
  • the circle between the present digital imaging method and the production techniques for dental prostheses or aids is therefore closed out due to an insufficient dynamic occlusion.
  • this method is generally used in all areas of diagnostics and therapy of craniomandibular dysfunctions.
  • a method of generatively producing a dental prosthesis, a partial denture, a full denture, or an orthodontic appliance wherein the manufacturing is based on the dynamic occlusion simulation method described above. Further applications for the present method result in addition to orthodontics in the field of forensics and, of course, in the field of research and development.
  • the present invention provides in a further aspect, further methods that allow in particular the detection and measurement of the movements of the jaw and thus also for the diagnosis of craniomandibular dysfunction (CMD) are suitable as well as for the preparation of appropriate treatment aids to malposition to treat the mandibular arches or malfunctioning of the temporomandibular joint.
  • CMD craniomandibular dysfunction
  • a method which displays in real time the movement of the jaw and temporomandibular joint without virtual articulators and possibly provides further relevant measurement data.
  • Dysfunctions and myoathropathies in the chewing system, occlusion disorders, parafunction of the masticatory apparatus and / or chronic temporomandibular joint diseases can also be diagnosed with the method according to the invention.
  • only one scanning device is used to create the virtual denture models and to record the lower jaw movement.
  • This is achieved by means of a so-called visual 3D tracking method, as mentioned below.
  • Another advantage of this method lies in the fact that during the treatment of the patient, the movement of his lower jaw is recorded and even directly after the recording together with the patient, the computer-aided diagnosis can take place without expensive and time-consuming use of virtual articulators.
  • a great advantage of the present method is that only one measurement must be performed on the patient and not, as usual, at least 2 or more to obtain a reliable measurement.
  • So-called haptic feedback computer programs can be used for the diagnosis, which can represent and measure the anatomical peculiarities of the condyle of the temporomandibular joint, the occlusion of the jaw, whereby a virtual diagnosis can be provided for the first time without the need for operative measures.
  • the methods provided here have more cost-effective and time-shortened methods.
  • the method according to the invention makes use of the effect that the upper jaw, the temporomandibular joint and the skull plate, i. the bony structures of the skull are rigid entities that do not maintain their relations to each other within the space during movements of the e.g. Chewing organ change.
  • These patient-specific relations of the bony structures are uniquely determined by a static snapshot, e.g. Bite impressions, if necessary in addition an x-ray, which can also be created during a routine examination, generated.
  • the chewing movements of a patient are tracked, measured and recorded.
  • This digital real-time data path which already contains all the information of the patient's chewing motion, can then be placed via the virtual dentition model and the patient's temporomandibular joint by means of a suitable 3D or CAD soft- ware, whereby the chewing motion on the virtual dentition and joint , is transmitted.
  • This is a particular advantage of the method according to the invention since other devices and programs used in the prior art merely provide a data packet which virtually cumbersomely simulates and calculates a movement of the chewing organ via synchronization signals and virtual articulation software. Further analysis on the bony structures is not possible.
  • tracking data provides the 3D coordination data of the lower jaw movement in the room as well as generating additional measurement data and this information directly with the digital 3D view of the static images of the bony structures of the patient's skull can be superimposed and displayed without further steps are required.
  • the present invention relates to a method for digitally detecting the movement of a lower jaw in relation to the bony structures of the skull of a patient by means of a 3D scan and a 3D tracking method, comprising the steps:
  • the present invention relates to a method for digital imaging or diagnosis of craniomandibular dysfunction (CMD), comprising the following method steps:
  • jaw joint dysregulation and / or occlusion disorder is indicative of CMD.
  • the bony structure in the two methods mentioned above is selected from the group consisting of: upper jaw, skull plate and temporomandibular joint or a combination thereof.
  • the present method comprises the additional step of V) optionally modifying the digital jaw movement.
  • suitable computer programs such as a CAD and / or 3D and / or haptic feedback software, a target state of the teeth, the mandibular arches (alone or both) can be calculated by digitally correcting the previously observed malposition, function or movement of the temporomandibular joint (simulated) becomes.
  • a 3D image of the temporomandibular joint of the patient is also performed in step I).
  • Suitable methods for analysis of the temporomandibular joint include, for example, 3D x-ray analysis, MRI, CT, digital volume tomography (DVT), angiography, ultrasound or other imaging methods that make it possible to visualize bone structures such as the temporomandibular joint.
  • the method according to the invention can be combined with a 3D analysis such as digital volume tomography (CBCT) or 3D X-ray analysis, whereby the TMJ movement and the surrounding hard tissue structures can be reproduced 1: 1 simultaneously for the movement of the lower jaw for the first time. Bone thickness and texture can be safely determined and examined.
  • CBCT digital volume tomography
  • 3D X-ray analysis whereby the TMJ movement and the surrounding hard tissue structures can be reproduced 1: 1 simultaneously for the movement of the lower jaw for the first time. Bone thickness and texture can be safely determined and examined.
  • the present invention relates to a method for digital imaging or diagnosis of craniomandibular dysfunction (CMD), comprising the following steps:
  • the created positive models of the patient are transformed into a virtual dentition model.
  • the 3D scan data of the upper and lower dental archs that are present are read into a computer and transferred into a virtual upper and lower jaw model.
  • routine dentition registrations of the patient are made by having the patient bite on a wax platelet or some hardening mass is applied to the teeth and the patient bites until the mass hardens. Based on these registrations, the teeth of the upper and lower jaw can be determined to each other, this gearing is also scanned.
  • the optical marking unit On the basis of one or both positive models of the lower and upper jaw, the optical marking unit, a holder which cooperates with the measuring system, is produced. This is designed in such a way that it can be worn without hindering the patient while chewing and yet it is firmly anchored in the oral cavity.
  • at least one extension projects out of the oral cavity, to which active or passive marking elements, so-called position sensors, the marking elements, are attached.
  • Such extensions also referred to as para-occlusal cups, are known in the prior art and can be used, for example, as a cap, splint (patient-specific) or by means of a dental adhesive or rubber on the teeth of the preferably lower jaw (universal), be attached.
  • a cap splint
  • a dental adhesive or rubber on the teeth of the preferably lower jaw (universal)
  • the marking unit is not or is a patient-specific device accurate, ie patient-specific devices.
  • the acquisition and / or provision of the digital data in step I) is based on the recording by means of a 3 D scanner, which is able to digitally transmit optical signals to a software, which converts them into a 3D view ., can create a virtual mandibular arch and / or dentition model.
  • a 3 D scanner which is able to digitally transmit optical signals to a software, which converts them into a 3D view ., can create a virtual mandibular arch and / or dentition model.
  • Related cameras and software, i. 3 D scanners are known to the person skilled in the art.
  • 3D scanners consist of a sensor, e.g. a camera that can be enclosed in an apparatus and a computer workstation that visualizes the digital recordings and on which the data can be further processed.
  • Any camera system that is able to create 3D images of the mandibular arch and / or the maxillary arch or digitally reproduce image can be used.
  • the recording of the transition stages ("actual stages") of the simulated orthodontic correction movement with the aid of an imaging method selected from the group a) stereo photography or 3D photography
  • 3D measuring methods are based on so-called coordinate measuring arms, as offered for example by the company FARO Technologies.
  • Light field cameras differ in their construction from other cameras.
  • a light field camera has an image sensor, which is located behind a special lens grid. Thanks to the numerous lenses, individual points of light do not fall on the sensor. Rather, each light point is expanded into a circle.
  • the microlenses arranged between the objective and the sensor ensure that not only the amount of incident light but also its direction of propagation can be detected. From this information, it is then possible to calculate virtual planes of sharpness which finally make it possible to make decisive modifications to this after taking a picture.
  • the light field recorded with a light field camera contains such a large amount of information that it is possible to switch between a three-dimensional and a two-dimensional image without any problems, while also being able to change the depth of field without any problems. In this way, three-dimensional images usable in the context of the present invention can also be generated.
  • Light field cameras are offered, for example, by Raytrix GmbH.
  • a high-resolution optical digitizer which can also quickly and accurately deliver three-dimensional measurement data, which is also referred to as 3D or visual or 3D visual tracking method.
  • marking elements are applied to at least the para-occlusion spoon before the scan in step II).
  • marking elements are applied to at least the para-occlusion spoon before the scan in step II).
  • the marking elements are designed as high-contrast structure.
  • the marking elements are designed as small geometric surfaces, points, stars, squares, reflective surfaces or illuminants (fluorescent, glossy, etc.). Each entity can be used as a marker as long as it provides enough contrast to the ground to be detected by a sensor.
  • 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 marker elements or a plurality of the marker elements may be applied to the inside or outside of a tooth or other location in the mouth or face of the patient as a larger coherent element such as a strip, etc. are applied to the teeth and / or the spoon and / or the headband and / or the headband.
  • marking elements are applied until all six degrees of freedom are reliably determined.
  • Additional elements for example on a headband of the patient, are optional and serve to break out movements of the head when the patient's head moves significantly during the chewing motion. As a result, the patient would no longer have to sit in a seated, i. remain as quiet as possible, but could also record the chewing movements while standing or walking. This would be beneficial for animals or small children, whereas for adult human patients this is not necessary.
  • the patient chews on a chewing gum and / or simulates a chewing motion for a period of time. This is filmed with one of the visual tracking cameras listed above.
  • the 3 D / visual tracking method is based on the registration and tracking of certain points, the so-called “tracking points" provided by the marker elements.
  • the movement of an object in 3-D space can be tracked using this method when using at least 3 tracking points / object.
  • the software can track the position of these points during movement and thus determine the exact position of the object after or during the movement.
  • Related devices are known to the skilled person; See, for example, US Pat. 6,608,688, or US7336375. However, in none of the previously known methods is the direct use of this data for the representation of a chewing process shown or suggested.
  • the mandibular motion is created because during 3D tracking over a period of time, for example 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 20, 30, 40, 50 or 60 seconds, 1, 2 , 3, 4, 5, 6, 7, 8, 9, 10, 20 minutes the change of the marking points relative to the space ie a fixed point outside the face (practice occlusion), and / or for example a frame which is attached close to the patient, or measured on the patient's skull, maxillary arch and / or jaw joint.
  • the software can simultaneously display the image data of the 3D scan and the tracking points in real time or in real time in an image. Based on these recordings of the marker points, a recorded jaw movement can be replayed and analyzed. Likewise, by means of common software, an altered, i.e. Target occlusion to be created or simulated.
  • haptic feedback programs can help. Such programs are well known in the art and aid in diagnosis.
  • the haptic 3D modeling software Cloud9 by Anarkik3D in addition to 3D modeling, also offers its own 3D mouse. With the help of such a special mouse, you can not only navigate virtually through the room, but also receive haptic feedback on the 3D model. Also Labor Virtual Prototyping system used by SensAble Technologies, Inc.®. can be used.
  • a comprehensive diagnostic procedure can be provided for the first time allowing the skilled person to image the movement of the teeth in the lower and upper jaw relative to the movement of the temporomandibular joint and optionally also the tooth roots. lend and perform simulations of the dynamic occlusion in the actual and target state and much more.
  • the calculated by the inventive method of jaw movement data can thus be integrated one-to-one into common generative manufacturing process for creating real denture models as a basis for the preparation of dental prosthesis and orthodontic correction devices.
  • instructions are known in the art.
  • the scanned surfaces can be read into the surveying program for three-dimensional diagnosis and therapy planning VoXim® (IVS Solutions, Chemnitz, Germany) and processed further.
  • the simulated target data can also be sent directly to the CAM or 3D Printer to create the dentures and / or orthodontic correction devices directly.
  • the present invention relates to a method for producing a dental device or a denture, such as inlays, implants, crowns, partial crowns or tabletops, which is used in the treatment of temporomandibular dysfunction, comprising the following steps:
  • the dental medical device may be an orthodontic treatment instrument, such as brackets, Aligner, retainers, Häschienen, Knirschschienen, Aufbissschinen, or a positive and / or negative model of at least one stage based on the obtained digital data of the method according to the invention by means of a CAM technique.
  • an orthodontic treatment instrument such as brackets, Aligner, retainers, Häschienen, Knirschschienen, Aufbissschinen, or a positive and / or negative model of at least one stage based on the obtained digital data of the method according to the invention by means of a CAM technique.
  • the orthodontic treatment aid can be based both on the digital data or data record that were recorded during the scan and / or on the calculated data or data records that represent a simulation of an optimized (target state / stage) dental arrangement.
  • any snapshot, also called target stage of the simulated sequence of movements, ie a multiplicity of desired stages, or the data records relating thereto, can be used.
  • the method is also suitable for making crunchy bars, chillers and the like, without the need to create mechanical articulators or similar motion analysis on physical positive models using sophisticated denture registries.
  • all the necessary data can be generated that is necessary for the preparation of a diagnosis and a treatment plan, whereby it can be coordinated directly with the patient.
  • step I the 3D scan data from the actual state of the upper and lower jaw of a patient for the calculation of a virtual dentition model from upper and lower jaw are provided.
  • step II the axiographic data on the mandibular movement of the patient are provided.
  • step I) and step II) can be parallel in time and are not to be regarded as arranged in chronological succession.
  • step III) FIG. 1
  • the data from I) and II) are transferred into a virtual dentition model from upper and lower jaw or into a virtual anatomical articulator for simulating the jaw movement.
  • step IV a combination of the virtual dentition model and the virtual articulator in step IV) (FIG. 2).
  • step V) the simulation of the Jaw movement to verify the dynamic occlusion done by the combination.
  • step VI) the calculation and modification of the simulated jaw movement with respect to the desired So 11 state of the dynamic occlusion takes place.
  • FIG. 5 shows a patient (1) in whose oral cavity a possible embodiment of a paraocclusion spoon (2) is located.
  • the marker elements (3) which can be detected by the 3 D tracking method.
  • the para-occlusion spoon (2) is shown in a further embodiment in which the part located in the mouth is configured as a patient-specific splint and three passive marking elements (3) are applied to the rod protruding from the mouth are.
  • a sensor can detect marking elements (3) and records the movement of the marking elements (3) over time.
  • the received signals are sent to a computer workstation.
  • the patient-specific relations of the bony structures are uniquely determined by a static snapshot, e.g. Bite impressions and possibly additionally created by a 3D X-ray and scanned with the help of a 3D scanner, which also later performs the 3D tracking method (see Fig. 1 and not shown), and as a digital 3D mandibular arch model (5).

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  • Life Sciences & Earth Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • General Health & Medical Sciences (AREA)
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  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
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  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

Procédé de simulation de l'occlusion dynamique entre mâchoire supérieure et mâchoire inférieure, selon lequel un modèle de denture virtuel est représenté, sur la base de données de balayage en 3D de l'état réel des mâchoires supérieure et inférieure et de données axiographiques d'un patient, dans un articulateur virtuel, si bien que la simulation du mouvement des mâchoires peut être réalisée pour vérifier l'occlusion dynamique à l'aide de la combinaison du modèle de denture virtuel et de l'articulateur virtuel. Ledit procédé est utilisé par ex. pour la fabrication d'appareils d'orthopédie maxillaire en vue de traiter les dysfonctionnements crânio-mandibulaires.
PCT/EP2013/069533 2012-09-19 2013-09-19 Procédé de simulation de l'occlusion dynamique WO2014044783A2 (fr)

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WO2016142584A1 (fr) 2015-03-09 2016-09-15 Planmeca Oy Suivi de mouvement de mâchoire
WO2018065487A1 (fr) * 2016-10-04 2018-04-12 Forstgarten International Holding Gmbh Arc de retenue destiné à l'ancrage de capteurs de mouvements et procédé de fabrication
EP3527139A1 (fr) * 2018-01-26 2019-08-21 PaloDEx Group Oy Pièce à mordre portable pour corriger un mouvement d'un objet dans une tomographie assistée par ordinateur panoramique ou en imagerie céphalométrique à rayons x
CN111150507A (zh) * 2020-01-19 2020-05-15 四川大学 一种牙科咬合重建修复中转移咬合关系和形态设计的方法
WO2020141134A1 (fr) * 2019-01-04 2020-07-09 Forstgarten International Holding Gmbh Dispositif d'entraînement biomécanique pour l'articulation maxillaire
CN112790888A (zh) * 2021-01-26 2021-05-14 雅客智慧（北京）科技有限公司 下颌运动捕捉系统、捕捉方法以及模拟方法
CN113096236A (zh) * 2021-03-23 2021-07-09 北京联袂义齿技术有限公司 用于牙齿冠桥功能性咬合面的虚拟牙合架设计方法
WO2022179775A1 (fr) * 2021-02-24 2022-09-01 Gesellschaft Für Funktionsdiagnostik Dir®, System Mbh & Co. Kg Appareil de diagnostic
CN118697503A (zh) * 2024-08-27 2024-09-27 四川大学 一种上颌窦提升术用导航定位装置

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