WO2010013986A2 - Procédé de transformation d'un agencement de tissus mous et instrument dentaire fabriqué à l'aide dudit procédé - Google Patents

Procédé de transformation d'un agencement de tissus mous et instrument dentaire fabriqué à l'aide dudit procédé Download PDF

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Publication number
WO2010013986A2
WO2010013986A2 PCT/KR2009/004322 KR2009004322W WO2010013986A2 WO 2010013986 A2 WO2010013986 A2 WO 2010013986A2 KR 2009004322 W KR2009004322 W KR 2009004322W WO 2010013986 A2 WO2010013986 A2 WO 2010013986A2
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WO
WIPO (PCT)
Prior art keywords
soft tissue
image data
tissue array
array
model
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PCT/KR2009/004322
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English (en)
Korean (ko)
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WO2010013986A3 (fr
Inventor
이태경
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Yi Tae-Kyoung
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Publication date
Application filed by Yi Tae-Kyoung filed Critical Yi Tae-Kyoung
Publication of WO2010013986A2 publication Critical patent/WO2010013986A2/fr
Publication of WO2010013986A3 publication Critical patent/WO2010013986A3/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/45—For evaluating or diagnosing the musculoskeletal system or teeth
    • A61B5/4538—Evaluating a particular part of the muscoloskeletal system or a particular medical condition
    • A61B5/4542—Evaluating the mouth, e.g. the jaw
    • A61B5/4552—Evaluating soft tissue within the mouth, e.g. gums or tongue
    • 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
    • A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
    • A61B6/03—Computed tomography [CT]
    • 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
    • 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
    • A61C9/004—Means or methods for taking digitized impressions
    • A61C9/0046—Data acquisition means or methods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/002—Orthodontic computer assisted systems
    • A61C2007/004—Automatic construction of a set of axes for a tooth or a plurality of teeth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
    • A61C7/002—Orthodontic computer assisted systems

Definitions

  • the present invention relates to a method for arranging soft tissues and a dental instrument manufactured using the same, and more particularly, to a method for arranging teeth or soft tissues for establishing a correction plan for orthodontics and manufacturing a dental instrument accordingly. will be.
  • orthodontic appliances In general, when undergoing a rearrangement of the teeth for cosmetic purposes or other reasons, orthodontic appliances, called orthodontics, are inserted into the teeth to correct the orthodontics.
  • mechanisms for such orthodontics such as brackets, arcwires, o-rings, and the like.
  • Orthodontics first look at the current tooth alignment and then establish the target tooth alignment after appropriate correction. Once the target tooth arrangement is established, it is not a movement from the current tooth alignment to the target tooth alignment at a time, but rather divided into several stages to correct the teeth gradually. Therefore, orthodontic treatment requires many procedures and it takes a long time.
  • Orthodontics is closely related to the skeleton of the face as well as the teeth, and requires oral examination and various examinations including X-ray images.
  • the dentist creates an oral dental model using X-ray photographs or tensile materials of the patient's teeth and jaw structure, and then selects the appropriate target tooth based on the dentist's experience. It is common to establish an arrangement.
  • the orthodontic treatment is not performed at once with the target tooth arrangement, but as the orthodontic treatment is performed in several stages, the dentist visits the dentist several times to take an X-ray photograph or meet with a dentist. Accordingly, there is a problem that a lot of time is required for orthodontics, and a lot of costs are required for orthodontics, such as having a meeting with a dentist in charge.
  • the present invention divides the soft tissue model in the oral cavity into segments including individual teeth and a portion of the corresponding soft tissue, and arranges the image data of each segment in consideration of the occlusal relationship of the teeth.
  • the present invention provides a soft tissue arrangement method for obtaining a target soft tissue array for orthodontic treatment and easily performing orthodontic treatment using image data thereof, and a dental instrument manufactured by using the same.
  • the soft tissue arranging method of the present invention comprises the steps of: obtaining image data for an oral soft tissue model representing the initial soft tissue arrangement; Obtaining image data of a section including a portion of soft tissue and individual teeth constituting the soft tissue model; Obtaining image data representing a target soft tissue arrangement using the image for each section; And obtaining image data representing the soft tissue array step by step for partial movement of the teeth by using the image data representing the initial soft tissue array and the image data of the target soft tissue array.
  • the soft tissue model is a gypsum model representing the initial soft tissue arrangement, and image data for the initial soft tissue model is obtained using a three-dimensional scan.
  • the soft tissue model is a gypsum model representing the initial soft tissue arrangement
  • the image data for each section is segmented into segments containing a portion of the soft tissue corresponding to the individual teeth in the gypsum model three-dimensional each segment Get scanned.
  • the image data for each section is obtained by separating an image included in a portion of the soft tissue corresponding to the individual teeth from the image data representing the initial soft tissue array.
  • the soft tissue model is a setup model used for orthodontic treatment, and image data for the target soft tissue array is obtained using the three-dimensional scan after combining the sections with the setup model.
  • image data representing the target soft tissue array is obtained after arranging each section through an occlusion collision process using the image data for each section.
  • image data representing the target soft tissue array is obtained after arranging the sections based on the image data in which CT image data of the oral structure is matched with the image data for the soft tissue model.
  • the soft tissue model is a gypsum model representing the initial soft tissue array
  • the image data representing the target soft tissue array is segmented into segments containing a portion of the soft tissue corresponding to the individual teeth in the gypsum model considering the occlusal relationship of the individual teeth After each of the sections are rearranged, they are obtained using a three-dimensional scan.
  • the step of obtaining the image data indicating the soft tissue array for each step further includes the step of adjusting the soft tissue arrangement for each step in consideration of the occlusal relationship, movement interference and biomechanical hazard of the teeth during movement.
  • the step of obtaining the image data representing the soft tissue array step by step for the partial movement, the step of setting any reference point coordinates in the image data for each section; Extracting a path between the initial soft tissue array and the target soft tissue array using the reference point coordinates; And arranging the image data for each section so as to space the extracted path by a predetermined distance to obtain image data indicating the soft tissue array for each step.
  • the reference point is set to three or more for each section, characterized in that set in the soft tissue contained in each section.
  • the setting of the reference point coordinates may include setting reference point coordinates in the soft tissue of each segment in the matched image data after matching the image data for each segment with the image data representing the initial soft tissue array. It features.
  • the paths of the initial soft tissue array and the target soft tissue array may be matched to the image data representing the target tooth array in which the reference point coordinates are set to the image data representing the target tooth array, and then the respective soft tissue arrays and the target soft tissue arrays. Extract using reference point coordinates.
  • the dental instruments for the soft tissue array in stages are manufactured using RP.
  • the dental instrument for the soft tissue array in stages is produced through CAD / CAM using the image data representing the soft tissue array in stages.
  • a dental instrument manufactured using the soft tissue arranging method of the present invention is manufactured using an image representing the soft tissue arranging obtained by the soft tissue converting method.
  • the present invention having the above configuration has the effect of easily and efficiently establishing an optimal orthodontic plan for each patient.
  • FIG. 1 is a flow chart showing a soft tissue arrangement method according to the invention
  • FIG. 2 is a view showing an example of image data of a section including a portion of individual teeth and soft tissue
  • FIG. 3 is a view showing a state before matching of image data for fragments with the image data indicating the initial soft tissue arrangement
  • FIG. 4 is a view showing a state in which the image data representing the initial soft tissue arrangement and the image data for the section is matched
  • FIG. 5 is a view showing a process of obtaining a soft tissue arrangement step by step using a reference point by the soft tissue arrangement method according to the present invention.
  • step S10 image data of the soft tissue model in the oral cavity obtained through various methods is obtained.
  • a soft tissue model made of gypsum or the like may be obtained by using a 3D scanning device to obtain image data of the soft tissue model.
  • image data for the initial soft tissue model can also be obtained through an intra oral scanner.
  • CT it is possible to obtain image data using CT, but in order to clearly distinguish between soft tissue and cheek, it is preferable to use a CT scan in which the patient artificially inflates the cheek or use a device that separates the cheek from the soft tissue.
  • step S20 After obtaining the image data showing the initial soft tissue arrangement, it is segmented into sections containing individual teeth, each of which contains individual teeth to be corrected and a portion of soft tissue corresponding to the individual teeth (step S20). Correction is made by properly moving the teeth and for this purpose, the device is equipped with orthodontic devices. Teeth can be classified as crowns on the gums and roots embedded in the gums.
  • the present invention obtains the image data of the gum through the soft tissue model in step S10. If the tooth is moved in this state, the soft tissue constituting the soft tissue model is also moved at the same angle. Therefore, the soft tissues are moved in the same way as the teeth are moved, so that the movement of the soft tissue corresponding to each tooth in the lower part of the teeth can be utilized for the correction of the orthodontics.
  • the present invention obtains the image data of the initial soft tissue arrangement through the soft tissue model in the oral cavity and separates into segments consisting of individual teeth and soft tissues corresponding to the individual teeth, and then utilizes the image data of the separated sections.
  • the image data for the target soft tissue array can be obtained from the image data of the initial soft tissue array using the image data, but the soft tissue model can be fabricated as an orthodontic setup model, and the fragments containing the teeth and some soft tissues can be physically attached directly to the setup model.
  • the target soft tissue array can be moved to obtain image data through 3D scanning. Using this method, although some manufacturing process is added, the conventional treatment process can be used as it is, there is a convenient and efficient feature.
  • FIG. 2 shows an example of image data of a section including individual teeth and a portion of soft tissue, wherein each section includes an individual tooth 10 and a portion of soft tissue 12 corresponding to each tooth.
  • Image data of these sections can be obtained in various ways for all teeth. First, when the soft tissue model obtained in the oral cavity is made of gypsum, the gypsum model may be separated into sections including individual teeth, and then image data may be obtained by 3D scanning. The above method has the effect of obtaining accurate data for each section.
  • the image data for each tooth can be obtained by separating the image for each tooth from the image data of the soft tissue model made of plaster obtained in step S10.
  • the image data for each section is obtained by using the already obtained image data, there is an advantage that no separate work is required, but in terms of accuracy, it is more accurate than the case where the image data is obtained from the separated section after separating the plaster model. Falls in terms of accuracy.
  • the present invention can obtain more accurate image data because the image data is obtained after separating into pieces.
  • the image data for the sections are rearranged to obtain a target soft tissue array representing the corrected tooth arrangement (step S30).
  • the target soft tissue array first includes the image data for the initial soft tissue array and each section. After the image data is matched, each tooth is moved and rearranged by considering various factors such as occlusal relationship and appearance of each tooth. As described above, the image data of the target soft tissue array can be obtained by rearranging each segmented tooth and soft tissue fragments on the articulator according to the intuitive process of the technician in the setup model, and then performing the imaging process such as scanning again.
  • the image data of each section and the image data for the initial soft tissue array can be matched by various methods.
  • the image data of some soft tissue and the initial soft tissue array included in each section is matched through surface matching.
  • Surface matching is performed by extracting the phase when the sum of various scalar values of the distance between two image surface point groups is minimized through statistical method of each surface point group data.
  • the image data of the target soft tissue arrangement can be obtained by rearranging and moving each section in consideration of the patient's appearance, the arrangement of the teeth, and the occlusal relationship between the teeth.
  • the target soft tissue array can be obtained by scanning a plaster model in which each tooth and soft tissue section is rearranged on the articulator through an intuitive work process of a technician, or the matching image data matching each segment and the initial soft tissue array image is placed on the digital articulator. Each section can then be moved and obtained to reflect the calibration plan of the orthodontist.
  • 3 and 4 are diagrams showing before and after matching of image data representing an initial soft tissue arrangement and image data for a slice, respectively. After acquiring the image data for the initial soft tissue array and the image data for each section as described above, match the initial soft tissue array and the image data of each section through the surface matching of the soft tissue, Rearrangement yields the target soft tissue arrangement.
  • the target soft tissue array may be obtained by using the image data obtained by matching the CT data reflecting the patient's oral condition to the matching data of the initial soft tissue array and the segment image data.
  • the movement of the root can be included in the orthodontic treatment plan, but also the facial appearance can be obtained from the CT image and include a corrective relationship with soft tissues such as the lips from an aesthetic point of view.
  • the image data for the target soft tissue array will have an image element that is common to the initial soft tissue array, which allows the extraction of individual tooth movement paths.
  • the movement path of the reference point in the initial soft tissue array and the target soft tissue array may be extracted to determine the movement path of the soft tissue including the individual teeth.
  • at least three reference points are given for use in extracting the movement path. This is because the movement of individual teeth can be made in the x-axis, y-axis, and z-axis directions, and at least three reference points must be given to extract the movement path more accurately.
  • the movement path can be extracted through the two reference points, but it loses a little in terms of accuracy.
  • the soft tissue array for the partial movement is divided by n equal parts of the movement path of each tooth or soft tissue.
  • image data can also be obtained through a nonlinear method.
  • some orthodontic instruments for example, transparent orthodontics, are orthodontically corrected in stages, so that the braces are manufactured several times until the final correction.
  • the movement pattern of each step may be corrected by considering the occlusion, movement interference, and biomechanical hazard.
  • the orthodontic treatment process is cumbersome and expensive, such as establishing a step-by-step correction plan based on the individual experience of the doctor in charge of the step-by-step brace or making a dental model for each brace. same.
  • the path is extracted in contrast to the image data of the initial soft tissue array.
  • the reference point is assigned to the soft tissue included in each section for the path extraction, and the path can be extracted more efficiently and accurately by using the assigned reference point.
  • Reference numeral 30 in FIG. 5 denotes image data obtained by matching data about fragments to the initial soft tissue array
  • reference numeral 40 denotes image data of the target soft tissue array rearranged in consideration of the occlusal relationship between teeth.
  • A1-A4 shows the movement path of each section, and is extracted through the movement of the reference point given to the soft tissue as described above.
  • the method may further include obtaining image data representing a stepwise soft tissue arrangement for partial movement.
  • Step-by-step dental instruments for example, can be made only by step-by-step soft tissue arrangement.
  • the movement of teeth and the movement of soft tissues corresponding to the teeth have the same pattern.
  • the soft tissue arrangement method of the present invention can establish an optimal orthodontic treatment plan for each patient at a time without a separate test or procedure after obtaining data on the X-ray, CT and the arrangement of the teeth.
  • the present invention has the effect of easily and efficiently establishing an optimal orthodontic plan for each patient. In addition, it is effective to establish a systematic correction plan with only one examination without taking multiple X-ray photographs or making tooth patterns. In addition, there is an effect that can be easily produced in conjunction with the orthodontic treatment plan when the production of dental instruments for each step can be easily produced. In addition, it is possible to manufacture the calibration device precisely and accurately, overcoming the limitations of surface roughness, step, etc. of the conventional base model for the manufacture of some calibration device. In addition, as the process of fabricating the base model is simplified, the time required to make the orthodontic device is relatively short, and the image data is obtained by segmenting into fragments including a part of the tooth and the soft tissue, thereby obtaining more accurate and accurate data. There is an effect of obtaining accurate image data, which has industrial applicability.

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Abstract

La présente invention concerne un procédé d'agencement de tissus mous à l'aide de données d'image et un instrument dentaire fabriqué selon ledit procédé, et plus particulièrement, un procédé d'agencement de tissus mous à l'aide de données d'image dans lequel un agencement de tissus mous cible pour l'orthodontie peut être facilement obtenu après segmentation d'un modèle de tissus mous dans la cavité orale en tranches comprenant une dent individuelle et une partie des tissus mous correspondants; ensuite les données d'image de chaque tranche segmentée sont agencées en considérant le rapport occlusal des dents, ainsi qu'un instrument dentaire fabriqué à l'aide du procédé. Le procédé d'agencement des tissus mous de l'invention comprend: une étape consistant à obtenir des données d'image pour un modèle de tissus mous dans la cavité orale représentant un agencement de tissus mous initial; une étape consistant à obtenir des données d'images pour des tranches comprenant une partie de tissus mous, à composer le modèle de tissus mous susmentionné, et une dent individuelle; une étape consistant à obtenir des données d'image représentant l'agencement de tissus mous cible à l'aide d'une image pour chaque tranche; et une étape consistant à obtenir des données d'image représentant un agencement de tissus mous progressif pour un déplacement partiel des dents à l'aide des données d'image représentant l'agencement de tissus mous initial susmentionné et des données d'image pour l'agencement de tissus mous cible. Le procédé d'agencement de tissus mous basé sur l'invention présente les avantages suivants: il permet d'établir facilement et efficacement un plan de traitement orthodontique progressif; et il permet de fabriquer facilement un instrument dentaire pour le traitement orthodontique à l'aide de données d'image pour un agencement de tissus mous progressif.
PCT/KR2009/004322 2008-08-01 2009-08-03 Procédé de transformation d'un agencement de tissus mous et instrument dentaire fabriqué à l'aide dudit procédé WO2010013986A2 (fr)

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KR1020080075523A KR20100013822A (ko) 2008-08-01 2008-08-01 연조직배열 변환방법 및 이를 이용하여 제작된 치과용기구
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US9206997B2 (en) 2008-07-29 2015-12-08 Syenergy Integrated Energy Solutions Inc. Curved transpired solar air heater and conduit

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KR101109424B1 (ko) * 2011-06-16 2012-01-30 김태원 투명 교정기 제조 방법
KR101295611B1 (ko) * 2013-02-06 2013-08-13 주식회사 리얼오쏘 투명 교정기 제조 장치 및 그 제조 방법
CN113693747B (zh) * 2020-05-21 2023-03-24 广州黑格智造信息科技有限公司 一种3d牙模自动摆正方法、系统、装置及存储介质
WO2024014912A1 (fr) * 2022-07-13 2024-01-18 주식회사 메디트 Procédé de traitement d'image, dispositif électronique et support de stockage lisible par ordinateur

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KR100657724B1 (ko) * 1997-06-20 2006-12-14 얼라인 테크놀러지 인코포레이티드 점증 치아 이동방법 및 시스템

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KR100657724B1 (ko) * 1997-06-20 2006-12-14 얼라인 테크놀러지 인코포레이티드 점증 치아 이동방법 및 시스템
KR100667463B1 (ko) * 1997-06-20 2007-01-10 얼라인 테크놀러지 인코포레이티드 점증 치아 이동방법 및 시스템

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9206997B2 (en) 2008-07-29 2015-12-08 Syenergy Integrated Energy Solutions Inc. Curved transpired solar air heater and conduit

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