WO1998019622A1 - Dental digitalization process - Google Patents

Dental digitalization process Download PDF

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Publication number
WO1998019622A1
WO1998019622A1 PCT/ES1997/000260 ES9700260W WO9819622A1 WO 1998019622 A1 WO1998019622 A1 WO 1998019622A1 ES 9700260 W ES9700260 W ES 9700260W WO 9819622 A1 WO9819622 A1 WO 9819622A1
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WO
WIPO (PCT)
Prior art keywords
dental
negative
patient
procedure
mold
Prior art date
Application number
PCT/ES1997/000260
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Spanish (es)
French (fr)
Inventor
Salvador Albalat Estela
Original Assignee
Navimetric, S.L.
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 Navimetric, S.L. filed Critical Navimetric, S.L.
Priority to AU47825/97A priority Critical patent/AU4782597A/en
Publication of WO1998019622A1 publication Critical patent/WO1998019622A1/en

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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
    • 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
    • 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
    • A61C9/0093—Workpiece support
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H20/00—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance
    • G16H20/40—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture

Definitions

  • the present invention relates to a new method for obtaining a digitized model of the bone and dental anatomy of one or both hemiarchates of a patient, in order to obtain a computer file with all the data related to the dental and bone surface that allow to carry out in a simple way all the necessary measurements and applications.
  • a more recent methodology consists in the use of probes that allow an exploration of the patient's mouth, so that from the specific measurements captured by the probes, a series of data are obtained that allow a three-dimensional reconstruction of the surface to be generated.
  • dental It can be used in the preparation of teeth, dentures or dentures.
  • European patent 0491808 describes a process for the production of a spare part of an individual tooth, as well as the device for the implementation of said process, the latter having a control unit that controls the movement of the measuring beam and the generation of three-dimensional images of areas opposite each other on the upper and lower teeth by a point-by-point exploration of the patient's mouth.
  • European Patent 0579718 describes a compact digitizer for dental applications that includes a probe that can move and trace a given dental surface, which has a mounting device for the plotter on a stable reference location, in order to define a base plane with respect to which measurements are made. All these patents present as a common denominator and fundamental inconvenience, which require a large amount of time to detect the points necessary to digitize the surface of a denture, during which time the patient must remain with his mouth open so that the doctor can Perform the necessary examination, which obviously represents a considerable discomfort for the patient.
  • the procedure proposed by the invention allows a perfect dental digitalization of any patient, with minimal discomfort for the patient, practically negligible compared to what happens with current dental digitalization systems. With this procedure, the need to prepare plaster models and consequently their storage is also eliminated.
  • said procedure consists in making an alginate mold or other printing material at the expense of the patient's mouth leaving the latter the imprint of his dental pieces on the printing material, to then scan said mold, with the collaboration of A three-dimensional scanner.
  • the dentist can perform the corresponding dentures exactly.
  • this descriptive report is attached, as an integral part thereof, of a single sheet of plans in which for illustrative purposes and not limitative and in its only figure, the necessary operating system for the implementation of the procedure for dental digitalization object of the present invention has been schematically represented.
  • the procedure for dental digitalization that the invention proposes part of obtaining a mold or negative (1), with the morphology of the dental arch, mold that is achieved by biting a mass of alginate or any other appropriate impression material, by the patient to whom the dental prosthesis will be performed.
  • This mold or negative (1) is placed on an impression tray (2), conveniently established on a mobile support (3), whose displacement that can be motorized allows the mold or negative (1) of the arch to be conveniently positioned dental with respect to a laser scanner or generator (4), with the particular particularity, as perfectly observed in the figure, that the impression tray (2) causes a certain angle with respect to the laser beam, to that the corresponding radiations cover the entire surface of the printing material.
  • the process is digitally recorded by means of several cameras (5) that, also with different angles and as seen in the figure, record the entire surface of the mold or negative (1), supplying the captured images, through a power system and interface (6) to a computer (7), equipped with software suitable for the treatment of the data collected and capable of generating a three-dimensional reproduction of the denture, visible on the corresponding screen (8).
  • a computer file is generated through which it is possible to obtain all the measurements of the dental arch, eliminating the need to make plaster models and their subsequent storage for taking measurements that need to be taken in the future.
  • the method of the invention allows said scanning operation to be carried out outside the patient's mouth, with complete independence thereof, in better working conditions and with better practical results.

Abstract

It consists in obtaining initially a negative (1) of the morphology of the dental arch of the patient by printing said arch into a mass of alginate, and further placing said negative (1) on a mobile support (2-3) to be analyzed by a tridimensional scanner (4) which, with the collaboration of cameras (5) which record digitally the scanned surface, sends information to a control system or computer (7) provided with an appropriate software in order to convert the digital information received into a tridimensional image of the dental arch or arches, visible on the screen (8) of said computer.

Description

PROCEDIMIENTO PARA DIGITALIZACION DENTAL PROCEDURE FOR DENTAL DIGITALIZATION
D E S C R I P C I Ó ND E S C R I P C I Ó N
OBJETO DE LA INVENCIÓNOBJECT OF THE INVENTION
La presente invención se refiere a un nuevo procedimiento para la obtención de un modelo digitalizado de la anatomía ósea y dental de una o ambas hemiarcadas de un paciente, al objeto de conseguir un archivo informático con todos los datos relativos a la superficie dentaria y ósea que permitan realizar de forma sencilla todas las mediciones y aplicaciones necesarias.The present invention relates to a new method for obtaining a digitized model of the bone and dental anatomy of one or both hemiarchates of a patient, in order to obtain a computer file with all the data related to the dental and bone surface that allow to carry out in a simple way all the necessary measurements and applications.
ANTECEDENTES DE LA INVENCIÓNBACKGROUND OF THE INVENTION
La técnica tradicional para la elaboración de una prótesis dental o dentadura postiza, parte de la utilización de una masa de alginato que el paciente debe morder para conformar con ella un molde, en cuyo interior se vierte escayola para obtener un modelo de la dentadura del paciente, a partir del cual el mecánico dentista confeccionará la correspondiente prótesis. Este método presenta como principal inconveniente que el médico dentista debe conservar todos estos modelos de escayola ya que constituyen su fuente de datos y medidas de las dentaduras de los pacientesThe traditional technique for the elaboration of a denture or dentures, part of the use of an alginate mass that the patient must bite to form with it a mold, inside which plaster is poured to obtain a model of the patient's denture , from which the dentist will make the corresponding prosthesis. This method has as its main drawback that the dentist must keep all these plaster models as they are the source of data and measurements of patients' dentures.
Una metodología más reciente consiste en la utilización de sondas que permiten realizar una exploración de la boca del paciente, de manera que a partir de las medidas puntuales captadas por las sondas, se obtienen una serie de datos que permiten generar una reconstrucción tridimensional de la superficie dentaria que puede ser utilizada en la elaboración de dientes, prótesis o dentaduras postizas.A more recent methodology consists in the use of probes that allow an exploration of the patient's mouth, so that from the specific measurements captured by the probes, a series of data are obtained that allow a three-dimensional reconstruction of the surface to be generated. dental It can be used in the preparation of teeth, dentures or dentures.
En este sentido cabe citar las patentes europeas 0376873, 04918018 y 0579718.In this regard, it is worth mentioning European patents 0376873, 04918018 and 0579718.
Concretamente en la patente europea 0366873 se describe un aparato para digitalizar el contorno de una superficie tridimensional, particularmente aplicable a la preparación de una corona dental, aparato que incluye una sonda transportable mediante una manivela y desplazable a los largo de los tres ejes de un sistema de coordenadas cartesianas, para contactar puntos de muestra en la superficie tridimensional de la boca, colaborando con esta sonda un sensor posicional para detectar la posición de la manivela a lo largo de los ejes citados.Specifically in European patent 0366873 an apparatus for digitizing the contour of a three-dimensional surface is described, particularly applicable to the preparation of a dental crown, an apparatus that includes a probe transportable by a crank and movable along the three axes of a system of Cartesian coordinates, to contact sample points on the three-dimensional surface of the mouth, collaborating with this probe a positional sensor to detect the position of the crank along the aforementioned axes.
La patente europea 0491808 describe un proceso para la producción de una pieza de repuesto de un diente individual, así como el dispositivo para la puesta en práctica de dicho proceso, contando este último con una unidad de control que controla el movimiento del haz de medición y la generación de imágenes tridimensionales de áreas opuestas entre sí sobre los dientes superiores e inferiores mediante una exploración punto por punto de la boca del paciente.European patent 0491808 describes a process for the production of a spare part of an individual tooth, as well as the device for the implementation of said process, the latter having a control unit that controls the movement of the measuring beam and the generation of three-dimensional images of areas opposite each other on the upper and lower teeth by a point-by-point exploration of the patient's mouth.
A su vez la patente europea 0579718 describe un digitalizador compacto para aplicaciones dentales que incluye una sonda que puede moverse y trazar una superficie dental dada, la cual tiene un dispositivo de montaje para el trazador sobre una localización de referencia estable, al objeto de definir un plano base con respecto al que se realizan las mediciones. Todas estas patentes presentan como denominador común e inconveniente fundamental, que requieren de una gran cantidad de tiempo para detección de los puntos necesarios para digitilizar la superficie de una dentadura, tiempo durante el cual el paciente debe permanecer con la boca abierta para que el médico pueda realizar la necesaria exploración, lo que evidentemente supone un molestia muy considerable para el paciente.In turn, European Patent 0579718 describes a compact digitizer for dental applications that includes a probe that can move and trace a given dental surface, which has a mounting device for the plotter on a stable reference location, in order to define a base plane with respect to which measurements are made. All these patents present as a common denominator and fundamental inconvenience, which require a large amount of time to detect the points necessary to digitize the surface of a denture, during which time the patient must remain with his mouth open so that the doctor can Perform the necessary examination, which obviously represents a considerable discomfort for the patient.
DESCRIPCIÓN DE LA INVENCIÓNDESCRIPTION OF THE INVENTION
El procedimiento que la invención propone permite una perfecta digitalización dental de cualquier paciente, con una molestia mínima para el mismo, prácticamente despreciable frente a lo que sucede con los sistemas actuales de digitalización dental. Con este procedimiento, se elimina también la necesidad de elaboración de los modelos de escayola y consecuentemente su almacenamiento.The procedure proposed by the invention allows a perfect dental digitalization of any patient, with minimal discomfort for the patient, practically negligible compared to what happens with current dental digitalization systems. With this procedure, the need to prepare plaster models and consequently their storage is also eliminated.
De forma más concreta dicho procedimiento consiste en realizar un molde de algínato u otro material de impresión a expensas de la boca del paciente dejando este último la huella de sus piezas dentales sobre el material de impresión, para seguidamente escanear dicho molde, con la colaboración de un escáner tridimensional .More specifically, said procedure consists in making an alginate mold or other printing material at the expense of the patient's mouth leaving the latter the imprint of his dental pieces on the printing material, to then scan said mold, with the collaboration of A three-dimensional scanner.
A partir de los datos facilitados por el escáner se obtienen una serie de curvas descriptoras de sucesivas secciones que permiten, tras el tratamiento en un ordenador con el software adecuado, generar una imagen tridimensional de la dentadura. De esta manera se puede obtener un archivo informático con los datos de las dentaduras de todos los pacientes que servirán posteriormente para la realización de todas las mediciones necesarias.From the data provided by the scanner, a series of descriptive curves of successive sections are obtained that allow, after treatment in a computer with the appropriate software, to generate a three-dimensional image of the denture. In this way you can obtain a computer file with the data of the dentures of all the patients that will serve later for the realization of all the necessary measurements.
Asimismo, a partir de los datos disponibles en el ordenador, el mecánico dentista podrá realizar de forma exacta las prótesis dentales correspondientes.Also, from the data available on the computer, the dentist can perform the corresponding dentures exactly.
Con este procedimiento se consigue no solo una gran precisión en los datos obtenidos sino que, además, el escaneado o captación de puntos se realiza sobre el molde de alginato, con lo que el paciente tan solo se ve molestado en la ineludible operación de morder la masa de alginato, realizándose la digitalización fuera de su boca .With this procedure, not only great precision is achieved in the data obtained but, in addition, the scanning or capture of points is performed on the alginate mold, so that the patient is only bothered in the inescapable operation of biting the alginate dough, digitizing out of your mouth.
DESCRIPCIÓN DE LOS DIBUJOSDESCRIPTION OF THE DRAWINGS
Para complementar la descripción que se está realizando y con objeto de ayudar a una mejor comprensión de las características del invento, se acompaña a la presente memoria descriptiva, como parte integrante de la misma, de una hoja única de planos en la que con carácter ilustrativo y no limitativo y en su única figura, se ha representado esquemática el sistema operativo necesario para la puesta en práctica del procedimiento para digitalización dental objeto de la presente invención.To complement the description that is being made and in order to help a better understanding of the features of the invention, this descriptive report is attached, as an integral part thereof, of a single sheet of plans in which for illustrative purposes and not limitative and in its only figure, the necessary operating system for the implementation of the procedure for dental digitalization object of the present invention has been schematically represented.
REALIZACIÓN PREFERENTE DE LA INVENCIÓNPREFERRED EMBODIMENT OF THE INVENTION
Tal como anteriormente se ha dicho, el procedimiento para digitalización dental que la invención propone parte de la obtención de un molde o negativo (1) , con la morfología de la arcada dental, molde que se consigue mediante mordedura de una masa de alginato o de cualquier otro material de impresión apropiado, por parte del paciente al que va a realizarse la prótesis dental.As previously mentioned, the procedure for dental digitalization that the invention proposes part of obtaining a mold or negative (1), with the morphology of the dental arch, mold that is achieved by biting a mass of alginate or any other appropriate impression material, by the patient to whom the dental prosthesis will be performed.
Este molde o negativo (1) se sitúa sobre una cubeta (2) de toma de impresión, convenientemente establecida sobre un soporte (3), móvil, cuyo desplazamiento que puede estar motorizado permite posicionar convenientemente el molde o negativo (1) de la arcada dental con respecto a un escáner o generador de láser (4) , con la especial particularidad, como se observa perfectamente en la figura, de que la cubeta (2) de toma de impresión origina una determinada angulación con respecto al haz de láser, para que las correspondientes radiaciones recorran toda la superficie del material de impresión.This mold or negative (1) is placed on an impression tray (2), conveniently established on a mobile support (3), whose displacement that can be motorized allows the mold or negative (1) of the arch to be conveniently positioned dental with respect to a laser scanner or generator (4), with the particular particularity, as perfectly observed in the figure, that the impression tray (2) causes a certain angle with respect to the laser beam, to that the corresponding radiations cover the entire surface of the printing material.
El proceso es registrado digitalmente mediante varias cámaras (5) que, también con diferentes angulaciones y como se observa en la figura, registran toda la superficie del molde o negativo (1) , suministrando las imágenes captadas, a través de un sistema de alimentación e interface (6) a un ordenador (7) , dotado de un software adecuado para el tratamiento de los datos captados y capaz de generar una reproducción tridimensional de la dentadura, visible sobre la correspondiente pantalla (8) . Así mismo se genera un archivo informático a través del cual es posible obtener todas las mediciones de la arcada dental eliminando la necesidad de realizar modelos de escayola y su almacenamiento posterior para las tomas de medidas que sea necesario realizar en el futuro.The process is digitally recorded by means of several cameras (5) that, also with different angles and as seen in the figure, record the entire surface of the mold or negative (1), supplying the captured images, through a power system and interface (6) to a computer (7), equipped with software suitable for the treatment of the data collected and capable of generating a three-dimensional reproduction of the denture, visible on the corresponding screen (8). Likewise, a computer file is generated through which it is possible to obtain all the measurements of the dental arch, eliminating the need to make plaster models and their subsequent storage for taking measurements that need to be taken in the future.
De esta manera y frente a la técnica convencional que requiere del escaneo directo en la boca del paciente, con la consecuente incomodidad y molestia para el mismo, el procedimiento de la invención permite que dicha operación de escaneo se realice fuera de la boca del paciente, con total independencia del mismo, en mejores condiciones de trabajo y con mejores resultados prácticos.In this way and against the conventional technique that requires direct scanning in the patient's mouth, with the consequent discomfort and discomfort for the same, The method of the invention allows said scanning operation to be carried out outside the patient's mouth, with complete independence thereof, in better working conditions and with better practical results.
Finalmente, si el médico dentista desea eliminar todos los modelos de escayola que tienen almacenados es posible proceder a su escaneo con el sistema propuesto y conservar únicamente los archivos dentales obtenidos. Finally, if the dentist wishes to eliminate all the plaster models that are stored, it is possible to proceed with their scanning with the proposed system and keep only the dental files obtained.

Claims
R E I V I N D I C A C I O N E SR E I V I N D I C A T I O N E S
Ia.- Procedimiento para digitalización dental, caracterizado porque consiste en la obtención, en una primera fase operativa, de un negativo de la morfología de la arcada dental, a base de un molde o negativo (1) de alginato u otro material de impresión similar, en el que el paciente deja la huella de su arcada, efectuando posteriormente sobre este negativo una operación de escaneo, con la colaboración de un escáner tridimensionalI a.- Procedure for dental digitization, characterized in that it consists of obtaining, in a first operational phase, a negative of the morphology of the dental arch, based on a mold or negative (1) of alginate or other impression material similar, in which the patient leaves the impression of his arch, subsequently carrying out a scanning operation on this negative, with the collaboration of a three-dimensional scanner
(4) , hasta la obtención de una serie de curvas descriptoras de sucesivas secciones que, tras el tratamiento informático con el software adecuado, permiten generar una reconstrucción tridimensional de la superficie dentaria y ósea de las arcadas del paciente para permitir posteriormente realizar las medidas o aplicaciones necesarias.(4), until obtaining a series of descriptive curves of successive sections that, after computer treatment with the appropriate software, allow generating a three-dimensional reconstruction of the dental and bone surface of the patient's arches to subsequently allow measurements or necessary applications.
2a.- Procedimiento para digitalización dental, según reivindicación Ia, caracterizado porque el haz de láser emitido por el escáner tridimensional accede al negativo con una determinada angulación, a la vez que dicho negativo se moviliza para que el haz de láser recorra toda la superficie del material de impresión, utilizándose una serie de cámaras (5) que registran digitalmente la superficie examinada.2 a.- Procedure for dental digitization, according to claim I a , characterized in that the laser beam emitted by the three-dimensional scanner accesses the negative with a certain angle, at the same time that said negative is mobilized so that the laser beam travels the entire surface of the printing material, using a series of cameras (5) that digitally record the examined surface.
3a.- Procedimiento para digitalización dental, según la reivindicación Ia, caracterizado porque el soporte móvil (3) sobre el que se posiciona el molde o negativo (1) puede estar motorizado. 3 a.- Procedure for dental digitization, according to claim I a , characterized in that the mobile support (3) on which the mold or negative (1) is positioned can be motorized.
PCT/ES1997/000260 1996-11-06 1997-11-04 Dental digitalization process WO1998019622A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU47825/97A AU4782597A (en) 1996-11-06 1997-11-04 Dental digitalization process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES09602341A ES2113327B1 (en) 1996-11-06 1996-11-06 DENTAL SCANNING PROCEDURE.
ESP9602341 1996-11-06

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WO1998019622A1 true WO1998019622A1 (en) 1998-05-14

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WO (1) WO1998019622A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2328430B1 (en) * 2006-04-06 2010-09-16 Moises Mora Garcia MANUFACTURING MACHINE FOR DENTAL AND MAXILOFACIAL PROTESIS FROM A THREE-DIGITAL DIGITAL MODEL THROUGH DIRECT APPLICATION OF LASER AND SINTERIZATION, AND PROCEDURE OF OPERATION OF THE MACHINE SAID.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0565174A1 (en) * 1992-04-06 1993-10-13 Elephant Holding B.V. Method for manufacturing a dental prosthesis
WO1994010935A1 (en) * 1992-11-09 1994-05-26 Ormco Corporation Custom orthodontic appliance forming method and apparatus
US5338198A (en) * 1993-11-22 1994-08-16 Dacim Laboratory Inc. Dental modeling simulator
WO1994024957A1 (en) * 1991-12-14 1994-11-10 Gerhard Bruckner Tooth structure/arrangement data acquisition process, device and impression tray for carrying out the process
US5452219A (en) * 1990-06-11 1995-09-19 Dentsply Research & Development Corp. Method of making a tooth mold

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5452219A (en) * 1990-06-11 1995-09-19 Dentsply Research & Development Corp. Method of making a tooth mold
WO1994024957A1 (en) * 1991-12-14 1994-11-10 Gerhard Bruckner Tooth structure/arrangement data acquisition process, device and impression tray for carrying out the process
EP0565174A1 (en) * 1992-04-06 1993-10-13 Elephant Holding B.V. Method for manufacturing a dental prosthesis
WO1994010935A1 (en) * 1992-11-09 1994-05-26 Ormco Corporation Custom orthodontic appliance forming method and apparatus
US5338198A (en) * 1993-11-22 1994-08-16 Dacim Laboratory Inc. Dental modeling simulator

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ES2113327B1 (en) 1999-01-01
ES2113327A1 (en) 1998-04-16

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