EP2387372A1 - Porte-empreinte et procédé permettant d'effectuer un relevé de structures, d'agencements ou de formes, en particulier dans la bouche ou le corps humain - Google Patents

Porte-empreinte et procédé permettant d'effectuer un relevé de structures, d'agencements ou de formes, en particulier dans la bouche ou le corps humain

Info

Publication number
EP2387372A1
EP2387372A1 EP09778368A EP09778368A EP2387372A1 EP 2387372 A1 EP2387372 A1 EP 2387372A1 EP 09778368 A EP09778368 A EP 09778368A EP 09778368 A EP09778368 A EP 09778368A EP 2387372 A1 EP2387372 A1 EP 2387372A1
Authority
EP
European Patent Office
Prior art keywords
impression
impression tray
tray
change
data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09778368A
Other languages
German (de)
English (en)
Inventor
Fritz Schmitt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MEDENTIC DEUTSCHLAND GMBH
Original Assignee
Medentic SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Medentic SA filed Critical Medentic SA
Priority to EP09778368A priority Critical patent/EP2387372A1/fr
Publication of EP2387372A1 publication Critical patent/EP2387372A1/fr
Withdrawn legal-status Critical Current

Links

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
    • A61C9/0046—Data acquisition means or methods
    • A61C9/008—Mechanical means or methods, e.g. a contact probe moving over the teeth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
    • A61B5/0015—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by features of the telemetry system
    • A61B5/0022—Monitoring a patient using a global network, e.g. telephone networks, internet
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0077—Devices for viewing the surface of the body, e.g. camera, magnifying lens
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
    • A61B6/51—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for dentistry
    • A61B6/512—Intraoral means
    • 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
    • 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
    • A61C9/0006—Impression trays
    • 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
    • A61C9/0046—Data acquisition means or methods
    • A61C9/0053—Optical means or methods, e.g. scanning the teeth by a laser or light beam
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/90—Compositions for taking dental impressions

Definitions

  • the invention relates to impression trays, in particular to dental impression trays, and to methods for detecting structures, arrangements or shapes, such as preferably for detecting tooth structures, arrangements or shapes in the mouth or in the human body.
  • detecting structures, arrangements or shapes such as preferably for detecting tooth structures, arrangements or shapes in the mouth or in the human body.
  • the invention can also be used in other areas of medicine, such as for determining arrangements and shapes as well as dimensions of surfaces (eg arm , etc.) or bone to prefabricate splints, prostheses or other aids, such as bone plates.
  • an impression of teeth or tooth structures in the mouth of a patient is first made with a conventional elastic impression material in a so-called dental impression tray. Based on this impression, a plaster model is then created which is scanned mechanically, optically or in another way in order to obtain 3D data from the teeth or tooth structures of a patient.
  • 3D data can then be an automated production of prostheses, so that a high accuracy, comparatively fast production and easy post-processing or reproduction can be realized.
  • impression material to be used must be stored by dentists in sufficient quantities, which can also lead to dehydration by superimposition, - in the preparation of the digital data from the plaster model must be assumed by the latter or just from the impression, without the possibility It is necessary to refer back to the patient, so that discrepancies can only be clarified consuming by repeated impressions by the dentist at the patient, with a before / after consideration, for example, in the environment of adjacent teeth because then usually already done further treatments (For example, grinding a tooth down to a stump for placing a crown) is basically no longer possible, and there is no possibility for further processing for production in computer-aided areas (digital data).
  • Stand devices require the patient to accept great inconvenience, since the patient just has to adapt to the requirements of such devices, for example to keep certain head and jaw positions constant during recordings,
  • the invention has and aims to remedy or at least reduce the disadvantages of the prior art.
  • the invention provides an impression tray, such as in particular a dental impression tray, for creating an impression of arrangements, shapes and / or dimensions, particularly in or on the human body, preferably in the mouth, and more preferably of at least part of a tooth or tooth structures, carries a deformable impression mass, further comprising sensor means by which a change of at least one physical property and / or size of the impression mass when creating a footprint spatially resolved detectable and ready for electronic data processing form is available.
  • an impression tray such as in particular a dental impression tray, for creating an impression of arrangements, shapes and / or dimensions, particularly in or on the human body, preferably in the mouth, and more preferably of at least part of a tooth or tooth structures, carries a deformable impression mass, further comprising sensor means by which a change of at least one physical property and / or size of the impression mass when creating a footprint spatially resolved detectable and ready for electronic data processing form is available.
  • impression tray is representative of a support member for the impression material, and the present invention is thus not limited to the use of a spoon-shaped support member or a design according to a Zahnabdruck- spoon in the conventional sense, but the shape, design and dimensioning of the support element directed in a manner obvious to a person skilled in the art according to the intended application, for which the expert in knowledge of the present invention no longer has to be inventive in his own initiative.
  • the sensor devices are designed to be connected to the impression compound
  • Cross-sectional change or thickness change, change in electrical resistance, and / or Change in the density and / or change in the distribution of foreign atoms in particular by changing the electrical or optical conductivity due to the change in density and / or change the distribution of foreign atoms spatially resolved to detect.
  • interface devices are coupled on the output side to the sensor devices in order to forward data generated by the latter in a form suitable for electronic data processing, wherein the interface devices preferably contain USB interface devices.
  • memory devices in particular decoupled memory devices, are preferably connected downstream of the interface devices, preferably as a chip card or as a memory stick.
  • connecting devices are preferably connected downstream of the interface devices, preferably as Bluetooth, infrared and / or radio devices.
  • the impression material is a homogeneous mass which, like a conventional impression material, is filled into the corresponding embodiment of the dental impression tray or general impression tray before it is likewise arranged in the patient's mouth in a conventional manner and pressed onto the denture.
  • the impression material can also be sterilized after each use and then reused.
  • the impression compound may also have the following properties with preference:
  • the mass conveys data corresponding to changes in pressing on a denture or other structure in the human body and its property to the sensor devices on the surface and on the inner surfaces of the impression tray and, in particular, the dental impression tray.
  • the data obtained in this way can be stored either directly in the impression tray and especially the dental impression tray or transmitted by cable, USB or by radio to a central PC, where it can now be used for further processing.
  • Another advantage is that the data for further processing can be sent online directly to a dental laboratory.
  • the impression tray is equipped or acts as a support for X-ray holder, while also the material of the impression tray can be designed at least in the areas or parts that are used in the measuring or treatment room, so that there is no X-rays through.
  • time measuring devices are integrated into the impression tray, wherein in particular the time measuring devices are assigned optical and / or acoustic signaling and / or display devices.
  • a battery is integrated, which is in particular possibly rechargeable via the USB port. It is also advantageous if an ergonomically shaped handle is provided.
  • a further preferred embodiment consists in that a detection unit and a receiving unit with a base plate, a frame, an inner boundary and the sensor devices are included.
  • the detection unit and receiving unit can be detachably connected to a handle (10) via a U-shaped retaining plate in particular, and / or the surface of the impression tray or at least of the base plate, frame, inner boundary and sensor devices can have a coating or be such that no bacteria adhere or bacteria are automatically destroyed, and / or at least base plate, frame, inner boundary and / or sensor devices can be adjusted in size.
  • heating devices are included, in particular in order to influence the flow method of the impression compound (14) or to provide its own sterilization function.
  • Yet another preferred embodiment is that on the underside of the impression tray registration for the opposite jaw is to bite, and / or that the impression tray is designed so that at the same time upper jaw and lower jaw can be molded with him.
  • impression tray can also be provided with preference that the impression material used, in particular glass-clear plastic, can be used simultaneously by grinding as an optical lens.
  • the sensor devices may advantageously be designed to react to an impression mass which contains one or more substances which react only specifically to or on specific light waves. It is preferable if the sen- Sor wornen, the detection unit and / or the recording unit is / is designed to provide the light waves, and / or when the sensor devices are designed to determine a by the impressions of objects in the impression mass in the latter changed transmission or reflection behavior to be able to.
  • the impression compound is a transparent polyether, preferably with high hydrophilicity, or an impression composition based on polyether, A-silicone, C-silicone hydrocolloid, polysulfide and / or alginate is.
  • impression material is reusable.
  • the impression material is applied to applied means, such as e.g. Sprays or liquids, responds to cause data transmission and / or storage.
  • applied means such as e.g. Sprays or liquids, responds to cause data transmission and / or storage.
  • a further preferred embodiment is that the impression material is selected so that their consistency is changed by supplied electrical energy.
  • the impression compound is such that it is a memory mass and accordingly exerts a memory effect, by going back to its original shape after activation.
  • / may be a screen or display and / or input devices, such as buttons are included.
  • a camera is provided in or on the impression tray in order to record an image of the patient or at least reference points and to add it to the ascertained dentition / tooth data.
  • the invention further provides a method for detecting ' . LO structures, arrangements or shapes, such as preferably for the detection of tooth structures, arrangements or shapes in the mouth or in the human body, wherein a deformable impression material is introduced into the mouth or body and there directly at sensor devices a change of at least one physical property and / or size of the impression mass
  • the sensor devices on the impression compound detect a
  • interface devices are coupled on the output side to the sensor devices in order to forward data generated by the latter in a form suitable for electronic data processing, wherein the interface devices preferably contain USB interface devices.
  • memory devices in particular decoupled memory devices, are preferably connected downstream of the interface devices, preferably as a chip card or as a memory stick.
  • connecting devices are preferably connected downstream of the interface devices, preferably as Bluetooth, infrared and / or radio devices.
  • the mass may pass on data corresponding to changes in pressing on a denture or other structure in the human body and its property to the sensor devices on the surface and on the inner surfaces of the impression tray and especially the dental impression tray.
  • the data obtained can either be stored directly in the impression tray and in particular a dental impression tray or transmitted by cable, USB or radio to a central PC, where they are now used for further processing, and / or the data for further processing online be shipped directly to a dental laboratory.
  • a further preferred variant of the method consists in first producing a first impression with a first impression material. is made, and then a second impression with, for example, ⁇ alternatively or alternatively thin-flowing impression material, which in turn, in turn, when combined use information in turn to the first impression material, is created.
  • the two impression materials can be used with different impression trays.
  • the impression compound of three different impression materials which are not miscible with one another is composed with different colors, different transmission and / or reflection properties, or that the impression material consists of several superimposed films, in particular different ones Colors exists.
  • Yet another preferred embodiment is that for the production of prostheses for denture parts, tooth structures, teeth and tooth parts first made an impression of the existing state before a treatment and thus the corresponding data is / is determined, then a treatment is performed, such For example, a grinding off of a diseased tooth, then an impression of the new condition is made again and the corresponding data of the new condition is / are determined, and then by matching and / or difference methods a prosthesis, such as crown or bridge, exactly with internal and outer shape and dimensions are made from the data from the two impressions taken.
  • the invention further relates to a device for detecting a three-dimensional structure of the human or animal body, in particular a tooth or dentition, comprising: a support for an impression mass, an impression mass arranged on the support, at least one illumination unit which is adapted to light in to irradiate the impression mass, and at least one sensor unit which is designed to detect light emerging from the impression mass and to generate spatially resolved raw data therefrom.
  • the light emerging from the impression compound and detected by the sensor unit may be light resulting from an interaction between the impression material and the incident light, light reflected from the structure to be measured, or light resulting from a combination thereof Phenomena comes from.
  • the impression compound comprises at least one material which is selected from the group consisting of the fluorescent materials, the phosphorescent materials, the light-scattering materials and the light-reflecting materials.
  • the impression compound comprises at least one material which is selected from the group consisting of the fluorescent materials and the phosphorescent materials, wherein the at least one illumination unit is designed to emit light of a wavelength which is in the excitation range of the fluorescent materials and / or the phosphorescent materials.
  • the impression compound is optically transparent in at least one wavelength range.
  • the illumination unit emits light of a wavelength that lies in the wavelength range of the optical transparency of the impression mass.
  • the at least one illumination unit has a light source which is selected from the group consisting of the LEDs, the RGB LEDs, the OLEDs and the laser LEDs.
  • the at least one illumination unit is designed to project a pattern into the impression compound.
  • the impression compound has a pattern which is applied to these and / or incorporated into this.
  • the at least one lighting unit is designed to emit pulsed light.
  • the raw data contain spatially resolved time of flight data.
  • the raw data contain spatially resolved brightness data.
  • the at least one sensor unit has a multiplicity of glass fibers and at least one optical sensor, one end of the glass fibers being aligned with the impression compound, and one second end of the glass fibers each being aligned with the at least one optical sensor.
  • the at least one optical sensor is selected from the group consisting of the CCD chips and the CMOS chips.
  • the device further has a memory unit for storing the raw data generated by the at least one sensor unit.
  • the device further comprises a computing unit for generating image data from the raw data generated by the at least one sensor unit.
  • the device also has an interface for passing on the raw data generated by the at least one sensor unit or the image data generated by the arithmetic unit to a data processing unit.
  • FIG. 1 is a schematic perspective view of an upper jaw for explaining the invention
  • FIG. 2 is a schematic perspective view of an impression tray in the form of a dental impression tray with detection unit, recording unit, USB stick, radio unit and storage medium,
  • Fig. 3 is a schematic perspective view of the
  • Impression tray in the form of a dental impression tray from FIG. 2 filled with an impression compound
  • FIG. 4 shows a schematic front view illustration of the upper jaw and the impression tray in the form of a dental impression tray from FIG. 3 and immediately before taking the impression, FIG.
  • FIG. 5 is a schematic plan view of the negative impression of the upper jaw in the impression mass in the impression tray in the form of a dental impression tray from FIG. 3 after taking the impression, FIG.
  • FIG. 6 is a schematic cross-sectional view of the impression mass after taking the impression
  • FIG. 7 is a further schematic sectional view of the impression mass in the impression tray in the form of a dental impression tray from FIG. 3 after taking the impression, FIG.
  • FIG. 8 is a schematic plan view of the negative impression of the upper jaw in the impression compound in FIG.
  • FIG. 10 a schematic representation of a manufactured model in a production machine, such as a milling cutter, in particular a CNC milling machine, controlled by the PC by means of CAM,
  • FIG. 11 is a schematic perspective view of a finished model that has been produced largely largely automatically on the basis of the determined, obtained and processed data,
  • FIG. 12 is a schematic perspective view of another embodiment of the impression tray in the form of a dental impression tray
  • FIG. 13 is a schematic perspective view of the further embodiment of the impression tray in the form of a dental impression tray from FIG. 12 with an additional detail,
  • FIG. 14 is a schematic perspective view of yet another embodiment of the impression tray in the form of a dental impression tray
  • FIG. 15 is a schematic perspective view of a detail of another embodiment of the impression tray in the form of a dental impression tray
  • 16 is a schematic side perspective view of yet another embodiment of the impression tray in the form of a dental impression tray
  • 17 is a schematic bottom view of the impression tray in the form of a dental impression tray of FIG. 16
  • FIG. 18 is a schematic perspective view of another embodiment of another embodiment of the impression tray in the form of a dental impression tray
  • FIG. 19 is a schematic perspective view of yet another embodiment of the impression tray in the form of a dental impression tray
  • FIG. 20 is a schematic perspective view of yet another embodiment of the impression tray in the form of a dental impression tray
  • 21 is a schematic perspective view of another embodiment of the impression tray in the form of a dental impression tray when used in a patient,
  • FIG. 2 is a schematic perspective view of the embodiment according to FIG. 21 of the impression tray in the form of a dental impression tray;
  • FIG. 21 is a schematic perspective view of the embodiment according to FIG. 21 of the impression tray in the form of a dental impression tray;
  • FIG. 23 shows a carrier for an impression compound with impression material arranged thereon
  • 24 a-c show an impression material provided with a pattern, in each case before, during and after the taking of an impression
  • 25 is a schematic, perspective view of another embodiment of the impression tray in the form of a dental impression tray
  • FIG. 25 is a schematic perspective view of the impression tray of FIG.
  • 27a-b is a schematic representation of a usable in the impression tray of Fig. 25 geometrical measuring method
  • FIG. 28 shows a further schematic representation of a in the impression tray of FIG.
  • Device and method features also result from pictorial and written representations of methods and devices.
  • FIG. 1 shows a schematic perspective illustration of a human upper jaw 1 with teeth 2, which is shown by way of example for many applications of the invention, in a single representation for better recognition in order to explain the invention.
  • FIG. 2 shows, in a schematic perspective illustration, an impression tray 3 in the form of a dental impression tray 4, which functions as detection unit 5 and recording unit 6, for which the impression tray 3 contains sensor devices 7, and contains an extension 8 with a USB connection 9 in order to be able to transfer data received directly to eg a PC (not shown).
  • a data transmission option can also be provided by an integrated or connectable radio unit (not shown) or by, for example, a remote control unit. integrated or connectable Bluetooth or infrared devices (not shown) to be created. Possibly.
  • the radio unit or Bluetooth devices may alternatively or likewise be accommodated in the extension 8.
  • a further possibility for data transmission can be realized by using an exchangeable storage medium (not shown) which is designed, accommodated or attached to it or to other suitable connections (not shown) of the impression tray 3, as the extension 8, such as a conventional USB stick (not shown) or a smart card (not shown).
  • the extension 8 simultaneously acts as a handle 10, on which the impression tray 3 can be gripped for insertion into and alignment and placement in a human oral cavity on a fully or partially detected jaw, such as the upper jaw 1 of FIG , which facilitates the handling of the impression tray 3 and minimizes the number of parts used.
  • the extension 8 may be removable from the impression tray 3 otherwise.
  • the impression tray 3 in the form of the dental impression tray 4 includes a base plate 11, a frame 12 and an inner boundary 13, and the sensor devices 7 are depending on the design and operation of the specific embodiment, which will be discussed in more detail below, the base plate 11, the frame 12 and /. or the inner boundary 13 assigned.
  • the dental impression tray 4 looks exactly like a conventional dental impression tray, which is advantageous because it allows it to be handled in the usual way.
  • the base plate 11, the frame 12 and the inner boundary 13 are thus for the introduction and use in the oral cavity (not visible) and shaped to match the upper jaw 1.
  • FIG. 3 is a schematic perspective view of the impression tray 3 in the form of the dental impression tray 4 from FIG. 2 with a suitable impression material 14 in conventional form Way filled, ie as with a conventional elastic impression for the previous Abformtechnik:.
  • This combination is chosen so that by means of the sensor devices 7, a change of at least one physical property and / or size the impression mass 14 when creating an impression eg of the upper jaw 1 or of at least one tooth 2 of FIG. 1 is detected spatially resolved and provided in a form suitable for electronic data processing, so that data is obtained from which 3D data of e.g. The maxilla 1 or at least one tooth from FIG. 1 can be determined, which 3D data then serve for the computer-assisted production of prostheses.
  • the sensor devices 7 on the impression compound 14 detect a change in the radiation permeability and / or radiation absorption, in particular light transmission and / or light absorption,
  • Cross-sectional change or change in thickness, change in electrical resistance, and / or change in density and / or change in the distribution of impurities in particular by changing the electrical or optical conductivity due to the change in density and / or change in the distribution of impurities.
  • FIG. 4 shows a schematic front view illustration of the upper jaw 1 and the impression tray 3 in the form of the dental impression tray 4 from FIG. 3 and immediately before the impression would take, which is realized in that as in the preparation of previously customary impressions of the impression tray 3 in the case of the upper jaw 1 is pressed from below onto the upper jaw 1, so that the teeth 2 of the upper jaw 1 press into the impression mass 14.
  • it is ensured that sufficient flowability exists at least in an initial time of the impression production, so that the impression material also penetrates into interspaces (not visible) when the teeth 2 are pressed in, as is also the case for the impression mass 14 of the present invention Preference applies.
  • FIG. 5 illustrates, in a schematic top view, the negative impression of the upper jaw 1 in the impression compound 14 in the impression tray 3 in the form of the dental impression tray 4 from FIG. 3 after taking the impression, wherein cavities 15 corresponding to the molded teeth are formed in the impression material 14. NEN 2 of the upper jaw 1 have emerged.
  • FIG. 6 shows in a schematic cross-sectional representation the impression mass 14 in isolation after impression taking, ie with indented cavities 15 corresponding to the molded teeth 2 of the upper jaw 1
  • FIG. 7 shows in a further schematic sectional view of the impression mass 14 in the impression tray 3 in the form of the dental impression tray 4 of FIG. 3 after taking an impression of a part of the upper jaw 1 of FIG. 1.
  • the deformations within the impression mass 14 are illustrated, which deformations by the deformation the impression material 14 as a result of the indentation of the teeth 2 of the upper jaw 1 during impression taking arise and change physical properties and / or sizes of or in the impression mass 14, which in turn are detected by the sensor devices 7, whereby the functions of the sensor devices 7 in connection with the impression mass 14 as detection unit 5 and recording unit 6 are realized.
  • the curved lines 16 may also be understood as symbolic of individual pressure ranges, transparency ranges, conductivity ranges, concentration ranges, etc., depending on the nature of the combination impression material 14 and sensor devices 7, as depending on the effect of the impression material 14 is utilized by the impressions of the teeth 2 of the upper jaw 1 and detected by the sensor devices 7.
  • FIG. 8 a schematic is also shown in FIG. 8
  • the production of the model for example by means of a CNC milling machine by CAM, which is controlled by the PC 17. 11, the finished model 19 of the upper jaw 1 of FIG. 1 can thus be produced largely and in particular completely automatically.
  • the schematic perspective illustration in FIG. thus, based on the data obtained, obtained and processed, without manual laboratory work, as would be required after the conventional impression taking.
  • the invention makes it possible for the 3D data required for the automated production of the model 19 of the upper jaw 1 to be obtained directly in the patient's mouth, or generally at the actual location for which a prosthesis is to be manufactured. It is not important here that the data is already provided by the detection unit 5 and the recording unit 6 by the sensor devices 7 in cooperation with the impression mass 14 as general 3D data, or whether a data format obtained therefrom is e.g. only after the transfer by USB connection, wireless, Bluetooth, infrared or the like to the PC 17 are converted into actual usable 3D data, for which the PC 17 also readily the required computing capacity provides, or just must be selected accordingly. It also does not matter if a PC 17 is in place, i. in the dental or orthodontic practice further processing of the data from the impression tray 3 makes or can make, or if this PC 17 only for data recording from the impression tray 3 and data forwarding to a separate computer, such as a PC 17 in a laboratory serves what With
  • Ease of operation can be done online, so that the data required for the model production at any rate get quickly, cost-effectively and safely to a laboratory where the production of the model 19 takes place, which is indicated by "data to laboratory” from FIG. 8 to FIG. 9 is clarified.
  • Step from the computer-aided data acquisition to automated manufacturing by the indication "data to further processing" between the figures 9 and 10 illustrates.
  • the indication "finished work” from FIG. 10 to FIG. 11 illustrates that the finished model 19, which is symbolic of a prosthesis to be produced, is present at the end of the detection process up to the production process.
  • an impression is first made of the existing state before a treatment, ie. the corresponding data are determined. Thereafter, the treatment is performed, such as, for example, abrasion of a diseased tooth. Thereupon, an impression is made again of the new state, i. E. the corresponding data of the new state are determined.
  • a prosthesis such as a prosthesis, can be used.
  • the crown or bridge should be made exactly with the inside and outside shape and dimensions from the data from the two impressions.
  • the impression tray 3 can also be used, for example, as a carrier for X-ray holders.
  • the material of the impression tray 3 can then at least in the areas or parts in the measuring or treatment room lie, be designed so that it does not let X-rays through.
  • time measuring devices may be integrated into the impression tray 3, to which visual and / or acoustic signaling and / or display devices (not shown) are assigned.
  • visual and / or acoustic signaling and / or display devices are assigned.
  • the molding process can be done in several stages. For example, only a first impression with a first impression material of the "coarse form" can be created, and then a second impression with, for example, additionally or alternatively thin-flowing impression material, which in turn, if combined, in turn, forwards information to the first impression material, a fine data set can be obtained , Such an approach may be beneficial to reduce the amount of data needed to take each impression, allowing easier, faster, and possibly even more accurate, production of the final 3D data.
  • the two impression materials can also be used with different impression trays 3.
  • the term "impression compound 14" is representative of one or more materials that can be used simultaneously or successively.
  • the impression compound 14 may also be composed of three different impression materials which are not miscible with one another, with different colors, different transmission and / or reflection properties, so that separate data and possibly information can be obtained from each material.
  • the impression mass 14 can also consist of a plurality of superimposed films, for example of different colors.
  • FIGS. 12 and 13 another design of the impression tray is illustrated, with emphasis placed on an ergonomically shaped handle 10.
  • the detection unit 5 and receiving unit 6 with the base plate 11, frame 12, inner boundary 13 and sensor devices 7 have a preferably U-shaped holding plate 21 releasably connected to the handle 10.
  • the surface of the impression tray 3 or at least of the base plate 11, frame 12, inner boundary 13 and sensor means 7 may be coated or designed so that no bacteria will adhere or bacteria will be automatically destroyed thereon, as illustrated by the coating 22 in FIG ,
  • the impression tray 3 can be configured so that at least the base plate 11, frame 12, inner boundary 13 and / or sensor devices 7 are adjustable in size in order to optimally adapt to conditions in individual patients as symbolized by the arrows A, B and C.
  • the impression tray 3 can also be heated in order to influence the flow method of the impression compound 14, or to provide its own sterilization function.
  • the impression tray 3 On the underside of the impression tray 3 can be a registration for the opposite jaw to bite, so that in the later processing of the data obtained in the PC, the jaws can be assigned to each other. But it can also be the impression tray 3 designed as shown in FIGS. 16 and 17 shows that with him at the same time upper jaw and lower jaw can be molded. Also, the impression tray 3 may be designed so that the impression material used 14, such as crystal clear plastic, can be used simultaneously by grinding as an optical lens. Such lenses 23, 24 and 25, as shown by way of example in some variants in FIG. 18, can be designed such that they, such as the lens 23, project or receive a striped pattern onto the object to be detected. Glass fibers may also be used, the free ends of which are ground so that lenses 24 are obtained which detect different areas when rotating through an oblique light exit surface or lenses 25 which cause beam expansion.
  • the impression material used 14 such as crystal clear plastic
  • the impression compound 14 may contain one or more substances that only react specifically to or on specific light waves provided by the sensor devices 7 or in general the detection unit 5 and / or the recording unit 6, by the impressions of the teeth 2 of the upper jaw 1 in the impression mass 14 at the latter changed transmission or reflection behavior just according to the invention determined spatially resolved. If another impression compound 14 were used which contains no such additive, the sensor devices 7 could not determine any data or with the aid of which no data could be determined.
  • the impression material 14 may be a transparent polyether, preferably with high hydrophilicity.
  • the impression compound 14 may also be based on polyether, A-silicone, C-silicone hydrocolloid, polysulfide and / or alginate.
  • the impression compound 14 is transparent according to the effect used, which is to be detected by the sensor devices 7, so that light refraction, degree of transparency, permeability of specific wavelengths can be utilized.
  • impression material 14 can also be such that it can be cleaned and sterilized for reuse, each however, reusability is not essential.
  • An impression material 14 may be used which, after taking the impression, has been applied to applied means, e.g. Sprays or
  • the impression compound 14 can also be chosen so that their consistency is changed by supplied electrical energy.
  • the impression material 14 may also be such that it is a memory mass and accordingly exerts a memory effect by going back to its original shape after activation.
  • the impression tray 3 may itself also be equipped with a screen 26 or display as well as with input devices, such as buttons 27 in particular, to check and facilitate applications, as will be apparent from the illustration of FIG.
  • a camera 29 can be provided in or on the impression tray 3 in order to record an image of the patient or at least reference points and to add it to the determined jaw / tooth data, whereby additionally an assignment of the received NEN data is made possible in relation to the head of the patient as a whole, as Figs. 21 and 22 illustrate.
  • the use of the impression tray 3 according to the invention has been primarily referred to in dental treatment applications, the technology according to the invention is not limited to such applications, but can be used in data collection by imaging in animals, plants, open body sites, inner ear, other cavities and so on be advantageously used in machine parts and components, without the knowledge of the present invention, a separate inventive activity would be required.
  • Another object of the invention is a non-curing impression material.
  • Teeth and Kieferan negligence used for the evaluation, diagnosis, planning and control of the accuracy of fit of conservative, prosthetic and orthodontic work.
  • the accuracy of fit of conservative, prosthetic and orthodontic work is the
  • a class of dental impression materials are the addition-curing silicones currently used as precision impression materials for creating highly accurate working models
  • addition-crosslinking silicone impression compounds are usually present in a two-component form and consist of a so-called base and catalyst paste, in which the reactive components are spatially separated from one another for reasons of stability.
  • condensation-curing silicones so-called K-silicones
  • K-silicones condensation-curing silicones
  • Impression materials are described for example in DE 19753456 Al and EP 0865784 A2.
  • impression compounds with natural polymers such as alginates or agar are used, which harden by gelling.
  • the object of the invention is to provide an alternative impression material and impression method for
  • impression compounds are based on a more or less viscous liquid phase, which contain no substances with reactive groups or substances which do not crosslink due to the composition of the impression material under the conditions of use.
  • the impression material contains no catalyst for a crosslinking or curing reaction.
  • the impression material is generally based on substances which are liquid at room temperature, such as liquid silicones (organopolysiloxanes), polyethers, hydrocarbons (eg oils), vegetable oil or liquid mixtures.
  • liquid phase In the liquid phase, corresponding or other solid substances may be dissolved.
  • Liquid silicones are e.g. Silicone oils such as linear, non-reactive polydimethylsiloxanes.
  • Polyethers are, for example, polyethylene glycols, polypropylene glycols or mixed polyethers (for example of tetrahydrofuran and ethylene oxide and / or propylene oxide units). In the liquid phase, e.g. liquid can be combined with solid polyethers.
  • Suitable hydrocarbons straight chain or branched, preferably saturated, nonvolatile liquid hydrocarbons, are e.g. Paraffin oil, n-paraffins, iso-paraffins.
  • Vaseline, an ointment-like mixture of solid and liquid hydrocarbons, can be used as a liquid phase.
  • the liquid phase advantageously contains inert diluents.
  • Suitable inert diluents are polyether polyols, such as polypropylene glycols or Mischpolyetherole with tetrahydrofuran and or or ethylene oxide and / or propylene oxide units, polyester polyols, such as polycaprolactone diols and Polycaprolactontriole, polycarbonate, aliphatic esters, oils, fats, waxes, aliphatic hydrocarbons, araliphatic Hydrocarbons and mono- or polyfunctional esters of mono- or polybasic acids, such as phthalic acid or citric acid, or esters or amides of alkylsulfonic acids and arylsulfonic acids used.
  • the impression material usually contains the liquid phase, one or more fillers optionally further additives, auxiliaries and dyes or pigments.
  • the base substance of the liquid phase and the fillers are preferably transparent to light, advantageously in a wide wavelength range, for example in the range of 200 to 700 nm or 300 to 700 nm.
  • Permeability or partial transmission for certain radiations eg radiation in the UV range, radiation in the range of visible light (vis range) or in the UV / vis range, radiation in the infrared range (IR range), in the near infrared range or even X-radiation is interesting for special applications, especially in combination with optical methods for 3 D-detection of impressions.
  • Special impression compounds or their basic composition consist of an inert Liquid such as silicone oil or paraffin oil and colorless metal oxides, especially precipitated or fumed silica. They are suitable for use with optical sensors.
  • a silicone-based impression material according to the invention contains, for example, the following
  • impression material contains no catalyst for a crosslinking reaction.
  • the amount of component (a) is generally 30 to 80 wt .-%, preferably 60 to 80
  • 53505 to be determined Shore A hardness of less than 45, preferably ⁇ 40, and has to be determined according to ISO 4823 consistency of 31 to 39 mm.
  • Preferred components (a) are diorganopolysiloxanes having terminal triorganosiloxy groups.
  • the polymer has a viscosity of between 200 to 200,000 mPa.s, preferably 1000 to 10,000 mPa.s.
  • Viscosity ranges.
  • Suitable components (a) are polymeric organosiloxanes without reactive substituents. They are preferably linear, branched or cyclic organopolysiloxanes in which all
  • Silicon atoms are surrounded by oxygen atoms or monovalent hydrocarbon radicals, wherein the hydrocarbon radicals may be substituted or unsubstituted.
  • hydrocarbon radicals are e.g. Methyl, ethyl, C2-C10 aliphatic, trifluoropropyl, and aromatic C6-C12 substituents.
  • component (a) is a mixture of silicones with a higher
  • Viscosity e.g., 1000 to 10,000 mPa.s at 25 ° C
  • silicones with a lower
  • Viscosity eg 50 to 1000 mPa.s at 25 0 C.
  • Low-viscosity silicones are eg
  • the amount of low viscosity silicone is e.g. 1 to 40 wt .-%, preferably 5 to 40 wt .-%, particularly preferably 15 to 30 wt .-%, based on the total mass of component (a).
  • hydrophilic impression material it is advantageous to add a hydrophilic nature-imparting agent or hydrophilizing agent, component (d), thus providing a better
  • the hydrophilizing agents are not with provided reactive groups. Suitable hydrophilicizing agents are preferably non-incorporable wetting agents from the group of hydrophilic silicone oils which are described in WO 87/03001 and in EP-B-0 231 420, the disclosure of which is hereby incorporated herein by reference. Also preferred are the ethoxylated fatty alcohols described in EP-B-0 480 238. Furthermore, preferred hydrophilicizing agents are the polyethercarbosilanes known from WO 96/08230. Also preferred are the non-ionic perfluoroalkylated surface-active substances described in WO 87/03001.
  • nonionic surface-active substances described in EP-B-0 268 347, ie the nonylphenol ethoxylates listed therein, polyethylene glycol mono- and diesters, sorbitan esters and also polyethylene glycol mono- and di-ethers.
  • the amounts used of the hydrophilizing agent are 0.1 to 10 wt .-%, based on the total weight of all components, preferably 0.2 to 2 wt .-% and particularly preferably 0.3 to 1 wt .-%.
  • Useful fillers according to component (b) include non-reinforcing fillers having a BET surface area of up to 50 m 2 / g, such as quartz, Christobalite, calcium silicate, zirconium silicate, lunar morionites such as benthonite, zheolites, including molecular sieves such as sodium aluminum silicate , Metal oxide powder, such as aluminum or zinc oxides or their mixed oxides, barium sulfate, calcium carbonate, gypsum, glass and plastic powder. Possible fillers also include reinforcing fillers having a BET surface area of more than 50 m 2 / g, such as, for example.
  • the fillers mentioned may be rendered hydrophobic, for example by treatment with organosilanes or siloxanes or by the etherification of hydroxyl groups to alkoxy groups. It can be a kind of filler, it can also be a mixture of at least two fillers used.
  • the particle size distribution is preferably chosen so that no fillers with grain sizes> 50 ⁇ m are contained.
  • the total content of the fillers (b) is in the range of 10 to 80%, preferably 30 to 60%, wherein the filler amounts are chosen so that a Shore A hardness of the mass of ⁇ 45 is not exceeded.
  • reinforcing fillers are particularly preferred.
  • the reinforcing fillers in amounts ranging from 1 to 10 wt .-%, in particular 2 to 5 wt .-%.
  • Preferred reinforcing fillers are pyrogenically prepared highly disperse silicas, which have preferably been rendered hydrophobic by surface treatment.
  • the surface treatment can be carried out, for example, with dimethyldichlorosilane, hexamethyldisilasane, tetramethylcyclotetrasiloxane or polymethylsiloxanes.
  • the surfaces of suitable pyrogenic silicic acids are preferably> 50 m ⁇ 2> / g, in particular 80 to 150 m ⁇ 2> / g.
  • the presence of the Surface treated fumed silica helps to adjust the consistency and to improve the stability of the pastes.
  • Suitable products are, for example, in the brochures of Degussa, today Evonik Degussa (Aerosil products, series Pigments, No. 11, 5th edition, 1991, on page 79 and the Fa. Cabot Corp. (Cabosil products, "CAB -O-SIL Fumed “silica in Adhesives and Sealants, Cabot, 1990).
  • non-reinforcing fillers are quartzes, Christobalites and sodium aluminum silicates, which may be surface treated.
  • the surface treatment can be carried out in principle by the same methods as described in the case of reinforcing fillers.
  • diatomaceous earth or diatomaceous earth. It consists of the very varied shaped silicic acid skeletons of unicellular, microscopically small algae (diatoms) living in fresh or salt water. The materials are usually mined in open-cast mining and also referred to as Infusorialerde, mountain flour or Bacillenerde. Preferred types of diatomaceous earth are used in calcined form. Preferred types of diatomaceous earth are e.g. B. the products with the trade name "Celatom" (sold by, for example, Fa.
  • novel molding compositions advantageously comprise as component c) dyes, preferably fluorescent dyes, pigments or finely divided metals, furthermore antioxidants, preservatives, release agents.
  • the novel compositions contain such additives in amounts of preferably 0 to 20 wt .-%, particularly preferably from 0.1 to 1 wt .-%.
  • the impression material contains germicidal or disinfecting agents such as chloramine T, chlorhexidine, copper or silver in fine distribution.
  • germicidal or disinfecting agents such as chloramine T, chlorhexidine, copper or silver in fine distribution.
  • Self-disinfecting materials are described in DE 19814133 A1, to which reference is made. Disinfectants are e.g. 3 to 7 weight percent contained in the impression material.
  • the impression composition advantageously contains colorants which comprise dyes, fluorescent dyes, phosphorescent materials, pigment, luminescence systems, in particular chemiluminescence systems, substances or polymers with chromophoric groups. Dyes in the narrower sense are soluble in the liquid phase, insoluble dyes are referred to as pigments. Colorants contained in the impression compound are advantageously used in combination with an optical sensor system. When distributing the colorant in the entire impression material, the colorants are used in amounts such that the impression material is still translucent.
  • the colorant-containing impression material should, for example, at a layer thickness of learning still have a good transmission for the measuring radiation used in an optical measuring system. If the colorants are used in a coating of the impression material, very high colorant densities are also used. Colorants, for example, contain 1 to 5 percent by weight in the impression material.
  • Dyes are, for example, indigo, indigotine, betanoin, chlorophyll a, chlorophyll b, chlorophyll c, chlorophyll c 2, chlorophyll d, green S, patent blue V (Na salt), patent blue V (Ca salt), brilliant blue FCF, brilliant black BN, brown HT, riboflavin, zeaxanthin, tartrazine, quinoline yellow S 3 yellow-orange S, carotene, curcumin, lutein, annatto, canthaxanthin, capsanthin, lycopene, litholubin, azorubin, amaranth, allura red. Dyes are for example 1 to 5 weight percent contained in the impression material.
  • Fluorescent dyes are e.g. Fluoresceins, rhodamines, coumarins, berberines, quinines, DAPIs, Nile Reds, allophycocyanins, indocyanine groups, stilbene, porphyrins (heme, chlorophylls, etc.), in particular luminol, perylene, coelenterazine, latia-luceferin, lucopteri, photinus luciferin, fluorescein, eosin Y. Fluorenszenzfarbstoffe are eg 5 to 20 weight percent contained in the impression material.
  • Phosphorescent materials are usually crystals with a small amount of impurity that disturbs the lattice structure of the crystal.
  • sulfides of second group metals and zinc are used and mixed with small amounts of heavy metal salts (eg, zinc sulfide with traces of heavy metal salts).
  • pigments for example, insoluble organic dyes, metal salts, effect pigments, finely divided metals (e.g., Cu, Ag, Au) are used in the liquid phase.
  • Pigments are e.g. Titanium dioxide, iron oxide (yellow), iron oxide (red), iron oxide (black), pigments are e.g. 1 to 5 weight percent contained in the impression material.
  • Colorants may also be polymers with chromophoric groups.
  • Such polymers may e.g. modified silicones or polyethers.
  • Chemiluminescence is a process that emits electromagnetic radiation in the range of visible light that is not of thermal origin through a chemical reaction.
  • the most well-known chemiluminescence systems are, for example, the oxidation of luminol by hydrogen peroxide in the presence of iron or manganese ions, the peroxyoxalate chemiluminescence and the chemiluminescence of 1,2-dioxetanes.
  • the chemiluminescent systems are preferably in pressure-sensitive coatings of the impression material or an Abform stresses, wherein the reaction components For example, be present micro-encapsulated.
  • smallest amounts of reagents of the components of a chemiluminescence system are enveloped by conventional methods of microencapsulation with wax or other conventional substances.
  • the microcapsules can be fixed directly as a thin layer on the surface of an impression body or a thin film (for example, bonding, adhesion, electrostatic, etc.) or admixed with a coating composition (for example, impression material).
  • the components of the chemiluminescence system are released by pressure, in particular during printing, and the chemiluminescent reaction can take place in the region of the impression.
  • the light emitted during the chemiluminescence reaction can be detected by a sensor system.
  • Pressure-sensitive layers, coatings or films can generally be constructed with microencapsulated colorants or reagents for color formation (e.g., color change upon pH change). Not all components of a system need to be microencapsulated. It can e.g. a component may be contained freely in a layer or the impression compound.
  • a composition containing a film-forming polymer e.g. Polyvinyl alcohol, polyvinyl acetate, polyvinylpyrrolidone, polyamide, polyarylsulfone and their copolymers. Film-forming polymers are e.g. dissolved or used as a dispersion.
  • a “film-forming polymer” is a polymer capable of forming a continuous and adherent film, alone or in the presence of a film-forming aid, which may be a film or the surface of a layer of an impression material or an impression body.
  • the film-forming polymer is e.g. to a polyurethane polymer.
  • Film-forming polymers and fluorine-forming compositions are described, for example, in DE 60105246 T2, DE 69736168 T2 and EP 0447964 Bl, to which reference is hereby made.
  • the composition may e.g. one or more colorants, one or more radiation-absorbing polymers (polymer with chromophore), conductive particles, magnetic particles or microencapsulated substances, in particular reagents. Impression materials with other liquid phase are prepared analogously.
  • the impression material is preferably translucent. This is important for an optical detection of an impression. For such an application, the impression material must have sufficient transparency for light, preferably in the wavelength range of 300 to 700 nm.
  • the impression material is preferably temperature-stable up to 200 ° C. and can be sterilized. Advantages of the impression material: chemical stability, easy handling, inexpensive, recyclable.
  • One or more impression materials are used to produce an impression body. As Abform stresses shaped structures are called from one or more impression materials, which may have additional parts or modifications.
  • the impression body usually has a support or is provided for receiving in a support.
  • the support is, for example, shell-shaped.
  • impression materials and impression articles are used, for example. used for impression trays.
  • Impression materials can be layered, e.g. horizontal layers of light and dark
  • FIG. Fig. 24a shows an impression body with a
  • Impression material 14 and a cover sheet 28 with grid pattern before the impression In Fig. 24b an intermediate phase during the impression and in Fig. 24c of the finished impression is shown.
  • Change of the grid line image in the area of the impression can serve as an aid in the three-dimensional recording of the impression.
  • cover sheet are suitable, e.g. elastic films of polyethylene-LD and PVC, as in
  • Cling film find application, and films made of polyurethane.
  • the surface of an impression body can also be printed directly with a pattern.
  • the detection system is preferably a detection system which determines the three-dimensional shape of an impression with the aid of sound, in particular ultrasound, or radiation, in particular light.
  • This can be done according to different operating principles or measuring principles: the radar measurement with sound or radiation, the geometric measurement and the absorption of radiation.
  • two or all of the mentioned measuring principles can be combined.
  • the radar measurement uses e.g. the reflection of a radiation pulse, in particular a light pulse, on the surface of the impression body or of an object. (Distance measurement over the duration of a reflected beam or reflected sound).
  • the geometric measurement exploits the distance dependence of the size of a radiation input cone (e.g., light input cone) of an optical fiber bundle.
  • the detection system has more than one measuring point, preferably three or more measuring points and particularly preferably a plurality of spatially distributed measuring points.
  • a detection system comprises at least one energy source (e.g., a radiation source, sound source, particularly ultrasound source), at least one sensor or receiver for the energy (e.g., image sensor or array of sensors or receivers), and a control and evaluation unit.
  • an energy source e.g., a radiation source, sound source, particularly ultrasound source
  • a sensor or receiver for the energy e.g., image sensor or array of sensors or receivers
  • a control and evaluation unit e.g., an optical detection system.
  • optical fibers with one or more image sensors are advantageously used.
  • the optical fibers are usually connected to the image sensor, wherein particularly advantageously each pixel or a group of pixels of the image sensor is associated with an optical fiber and terminate in close proximity.
  • the detection system includes one, two or more carriers for an impression material or is associated with one or more such carriers.
  • the remote from the image sensor, the other end of the optical fibers is preferably arranged in the region of the carrier.
  • One or more image sensors can also be arranged directly in the region of a carrier.
  • the measuring points are e.g. the optical fiber ends or pixels of an image sensor in the region of the carrier.
  • the carrier is e.g. a kind of trough or shell, in particular U-shaped in dental applications.
  • Such carriers are for example so-called impression trays.
  • the optical fiber used is glass fiber or polymer fiber (POF).
  • the optical fibers are usually used as a bundle. Preferably sorted optical fibers are used.
  • the glass fiber also includes optical fibers with a fiber core of quartz.
  • Polymer fibers are, for example PMA / PMMA fibers. Polyurethane fibers are particularly flexible.
  • image sensors e.g. CCD or CMOS sensors used in digital cameras or camera phones.
  • CMOS sensor chip dimensions: 12.5 x 12.5 mm
  • an optical fiber bundle is coupled directly to the sensor.
  • an optical fiber is assigned to a pixel, all or only part of the sensor pixels being used.
  • the fiber bundle is advantageously connected via a plug-in system with the sensor chip.
  • the image sensors are usually used without color filter in front of the pixels, that is, the image sensors are usually operated monochrome.
  • a fluorescent film or a similar auxiliary can be arranged between the support and impression material or impression body, in front of an image sensor on the support or optical fibers.
  • LED Light-emitting diodes
  • LEDs are used which emit light in the UV range, visible range or IR range, ie in the range of e.g. 200nm to 900nm.
  • LEDs of different ranges or wavelengths are combined.
  • the LEDs are preferably operated pulsed or clocked. Particularly advantageous light pulses of different wavelengths are used in the measurement, wherein the light pulses of the different wavelengths are emitted simultaneously or sequentially.
  • laser radiation for example laser diode
  • micromirrors can not be arranged in the impression mass because of the mobility.
  • the radiation pulses from different radiation sources may be emitted from different locations simultaneously or sequentially. This is usually done according to a special program, according to the radiation sources are controlled by a control unit.
  • the radiation pulses can be emitted directionally or undirected.
  • the beam can be deflected via controllable mirrors, in particular micromirrors.
  • Particularly suitable for this purpose is the so-called DLP (Digital Micromirror Device) technology from Texas Instruments.
  • the radiation source eg LEDs
  • the radiation can be arranged directly on the carrier for impression material or impression body, eg impression tray.
  • the radiation can, however, also eg via optical fibers or mirrors to impression mass or Impression body to be passed.
  • the same or different LEDs are distributed over the carrier, for example, as a row or band-like on the bottom of an impression tray.
  • the radiation sources are preferably arranged directly under the impression mass or the impression body, which are illuminated from bottom to top.
  • a pattern e.g. Grid lines or grid points are projected onto the surface (including the surface pressed in by the impression) of impression material or impression body.
  • Specially designed LEDs can be used to project the patterns.
  • the preferred optical sensor system utilizes the reflection of radiation, in particular radiation pulses or pulsed radiation, for precise detection of the contours of the impression of a body in an impression mass or an impression body with the aim of producing a true-to-scale and true-to-scale three-dimensional model of the body.
  • the detection can take place during the formation of the impression, during the taking of the impression and / or after taking the impression, the impression-forming body being present or removed.
  • all phases of the impression formation can be used, that is, it can be recorded sequences from the beginning of the impression to the finished impression. It can e.g. up to 500 frames per second can be recorded with the image sensor.
  • a pseudoplastic contrast image is created via an evaluation unit. At the same time a three-dimensional relief is determined. This system makes it possible to produce in particular a dental prosthesis required for a dental treatment completely computer-aided.
  • An optical sensor system is usually used with a completely or partially transparent impression material.
  • a liquid for example water, oil, silicone oil, polyether
  • the way over an impression is more advantageous because the gum is pushed back a little by the impression mass.
  • the impression material advantageously contains a colorant for absorption measurement, especially advantageously a dye or a fluorescent dye dissolved in the liquid phase.
  • Colorant or radiation is chosen so that the radiation can be absorbed by the colorant.
  • the beam is attenuated over the distance through the medium due to absorption.
  • a beam reflected at the interface of the impression material passes through a smaller distance in the region of the impression after the impression has been made than before the impression. So it is locally changed the layer thickness by the impression and thus the absorption.
  • This effect can be used additionally or alternatively to a radar measurement to determine distances or thicknesses.
  • the change in fluorescence can be detected as a measure of the change in local layer thickness.
  • Measurements with the system during or after taking the impression are compared in the evaluation with measurements before taking the impression.
  • a calibration of the system with the help of an object whose position and dimensions are known exactly.
  • fixed points or auxiliary structures on the impression body surface eg foil with grid lines as cover before and during impression taking
  • the system includes a support for an impression mass, an impression mass disposed on the support, at least one illumination unit configured to irradiate light into the impression mass, and at least one sensor unit configured to detect light emerging from the impression mass and to generate spatially resolved raw data.
  • the impression compound may comprise at least one material selected from the group consisting of the fluorescent materials, the phosphorescent materials, the light-scattering materials, and the light-reflecting materials.
  • the impression material may comprise at least one material selected from the group consisting of the fluorescent materials and the phosphorescent materials, wherein the at least one illumination unit is adapted to emit light of a wavelength in the excitation region of the fluorescent materials and / or the phosphorescent materials lies.
  • the impression mass may be optically transparent in at least one wavelength range.
  • the illumination unit can emit light of a wavelength that lies in the wavelength range of the optical transparency of the impression mass.
  • the at least one lighting unit may comprise a light source selected from the group consisting of the LEDs, the RGB LEDs, the OLEDs and the laser LEDs.
  • the at least one lighting unit may be configured to project a pattern into the impression mass.
  • the impression material may have a pattern applied thereto and / or incorporated therein.
  • the at least one lighting unit may be configured to emit pulsed light.
  • the raw data may include spatially resolved time of flight data.
  • the raw data may include spatially resolved brightness data.
  • the at least one sensor unit may comprise a plurality of glass fibers and at least one optical sensor, wherein one end of the glass fibers is aligned with the impression material and wherein each one second end of the glass fibers is aligned with the at least one optical sensor.
  • the at least one optical sensor may be selected from the group consisting of the CCD chips and the CMOS chips.
  • the apparatus may further comprise a memory unit for storing the raw data generated by the at least one sensor unit.
  • a computing unit for generating image data from the raw data generated by the at least one sensor unit may be present.
  • FIG. 25 shows an example of a dental impression tray 4 with detection unit 5 and handle 10.
  • Each individual wire represents a measuring point.
  • the measuring points ends of the glass fiber wires) are arranged and distributed on the inner surface of the cup-shaped carrier with inner boundary 13.
  • the glass fiber bundle 31 is connected via a plug connection with plug 33 to the image sensor 32, for example a CMOS sensor.
  • Each wire of the fiber is assigned to a pixel of the image sensor.
  • the light information (light intensity) of each wire is detected by the image sensor 32 in one measurement.
  • the measured values are stored with the aid of the control and storage device 34 with memory chip 35 and can later be transferred to a PC for evaluation via a USB interface.
  • the carrier with the measuring points is referred to as detection unit 5.
  • Detection unit 5 optical waveguide 30 or optical waveguide bundle 31, image sensor 33 with recording electronics and control and storage device 34 represent the detection system.
  • a series of LED which are arranged in the region of the bottom of the trough in the carrier (base plate) and in Fig. 25 are not shown. Also not shown is the impression mass or the impression body in the interior of the trough of the wearer.
  • Fig. 26 shows the detection unit 5 of Fig. 25 with the LED 36 as a radiation source for the optical detection system.
  • the LED 36 in FIG. 26 are the 14 pieces, are arranged at the bottom of the carrier and emit the light in the interior of the carrier in the impression mass or an impression body.
  • Fig. 27a the arrangement of teeth 2, glass fibers 30 and support wall 37 is shown schematically and greatly simplified. Between the support wall 37 and teeth 2 is the molding compound 14. Each glass fiber 30 has a Lichteintrittskegel 38, which depends on the shape and nature of the glass fiber end. For example, glass fibers 30 having a fixed light entrance angle of 45 ° are used (FIG. 27b). The glass fiber ends of the glass fibers 30 are arranged in different orientations in the support wall 37 in order to capture the contour of the teeth or the impression as well as possible from all sides.
  • Fig. 28 it is illustrated how the light entrance cone 38 of the glass fiber 30 (eg with a diameter of about 1 mm and 600 wires or single fibers) increases with the distance to an object 39 (eg a tooth 2). This means that the size of the light entry cone 38 is a measure of the distance of the object 39. With enlargement of the light cone, the detected area of the object 39 and thus the amount of light collected by the optical fiber 30 increases.

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  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

L'invention concerne un porte-empreinte (2), en particulier un porte-empreinte dentaire (3), qui porte une composition d'empreinte déformable (10) pour prendre une empreinte d'agencements, de formes et/ou de dimensions, notamment dans ou sur le corps humain, de préférence dans la bouche, et préférablement d'au moins une partie d'une dent (2) ou de structures dentaires (mâchoire supérieure 1). Ledit porte-empreinte comporte en outre des dispositifs capteurs (6) au moyen desquels une modification d'au moins une propriété et/ou une grandeur physiques de la composition d'empreinte (10) peut être détectée avec résolution spatiale lors de la prise d'une empreinte, et peut être fournie sous forme appropriée pour le traitement électronique des données. L'invention concerne encore un procédé permettant d'effectuer un relevé de structures, agencements ou formes, de préférence pour effectuer un relevé de structures dentaires, d'agencements ou de formes dans la bouche ou dans le corps humain.
EP09778368A 2009-01-15 2009-09-07 Porte-empreinte et procédé permettant d'effectuer un relevé de structures, d'agencements ou de formes, en particulier dans la bouche ou le corps humain Withdrawn EP2387372A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09778368A EP2387372A1 (fr) 2009-01-15 2009-09-07 Porte-empreinte et procédé permettant d'effectuer un relevé de structures, d'agencements ou de formes, en particulier dans la bouche ou le corps humain

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE202009000458 2009-01-15
IB2009006054 2009-04-23
EP09166523 2009-07-28
PCT/EP2009/006474 WO2010081498A1 (fr) 2009-01-15 2009-09-07 Porte-empreinte et procédé permettant d'effectuer un relevé de structures, d'agencements ou de formes, en particulier dans la bouche ou le corps humain
EP09778368A EP2387372A1 (fr) 2009-01-15 2009-09-07 Porte-empreinte et procédé permettant d'effectuer un relevé de structures, d'agencements ou de formes, en particulier dans la bouche ou le corps humain

Publications (1)

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EP2387372A1 true EP2387372A1 (fr) 2011-11-23

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EP09778368A Withdrawn EP2387372A1 (fr) 2009-01-15 2009-09-07 Porte-empreinte et procédé permettant d'effectuer un relevé de structures, d'agencements ou de formes, en particulier dans la bouche ou le corps humain

Country Status (6)

Country Link
US (3) US20120064477A1 (fr)
EP (1) EP2387372A1 (fr)
JP (1) JP5642090B2 (fr)
CN (1) CN102361598B (fr)
CA (1) CA2749860A1 (fr)
WO (1) WO2010081498A1 (fr)

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Also Published As

Publication number Publication date
CN102361598A (zh) 2012-02-22
JP2012515026A (ja) 2012-07-05
US20140186790A1 (en) 2014-07-03
US20170100219A1 (en) 2017-04-13
CN102361598B (zh) 2016-03-02
CA2749860A1 (fr) 2010-07-22
WO2010081498A1 (fr) 2010-07-22
US20120064477A1 (en) 2012-03-15
JP5642090B2 (ja) 2014-12-17

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