WO2011054177A1 - Procede pour concevoir des etages intermediaires de modele dentaire numerique complet - Google Patents

Procede pour concevoir des etages intermediaires de modele dentaire numerique complet Download PDF

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Publication number
WO2011054177A1
WO2011054177A1 PCT/CN2010/001737 CN2010001737W WO2011054177A1 WO 2011054177 A1 WO2011054177 A1 WO 2011054177A1 CN 2010001737 W CN2010001737 W CN 2010001737W WO 2011054177 A1 WO2011054177 A1 WO 2011054177A1
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WIPO (PCT)
Prior art keywords
tooth
digital model
teeth
designing
moving
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PCT/CN2010/001737
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English (en)
Chinese (zh)
Inventor
顾书华
范然
钮叶新
杨峰
金小刚
Original Assignee
常州高新技术产业开发区三维工业技术研究所有限公司
常州雷卡牙科医疗科技有限公司
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Application filed by 常州高新技术产业开发区三维工业技术研究所有限公司, 常州雷卡牙科医疗科技有限公司 filed Critical 常州高新技术产业开发区三维工业技术研究所有限公司
Publication of WO2011054177A1 publication Critical patent/WO2011054177A1/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
    • 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 of designing a digital model for intermediate full jaw teeth. Background technique
  • the bracketless invisible appliance has become more and more popular in recent years due to its aesthetic, comfortable, hygienic, removable and convenient.
  • the manufacturing method is as follows: (1) obtaining a high-precision digital model of the full-maxillary tooth by performing high-precision three-dimensional digital scanning and three-dimensional reconstruction of the model on the gingival or dental model; 2 correcting the digital model of the whole-collar tooth by computer-aided design
  • the program design generates a series of intermediate digital models of the teeth that have been adjusted to the position of the teeth; 3 a series of intermediate full-toothed teeth entities are generated by rapid prototyping according to a series of intermediate digital models of teeth that are adjusted according to a series of tooth positions in 2 Model; 4 press the heated plastic sheet with a positive or negative pressure on the middle full jaw tooth solid model; '5 After cooling, the excess material is trimmed by trimming to obtain a series of bracketless invisible appliances.
  • a key to this method of fabrication is the design of a series of intermediate full-tooth jaw models (digital models or solid models) with adjusted tooth positions.
  • computer-assisted design of a series of intermediate digital models of teeth with adjusted tooth position see Bai Yuxing, Zhou Jiejun, etc.: Development and development of domestically-made bracketless orthodontic orthodontic treatment system. Beijing Stomatology. p89-92 , 96. ( 2004 ); Zhai Peng, Gao Hongtao, etc.: Computer-assisted gingival deformity correction technique. China Mechanical Engineering. P1637- 1640, 1653. ( 2004 ); Chinese Patent No.: ZL02117088. 6; Chinese application patent number: 200510025479.
  • the object of the present invention is to provide a method of designing a digital model of an intermediate full jaw tooth that overcomes the existing simple bracketless invisible appliance that is merely a simple subsection of the need to correct the tooth from an initial state to a target state. Insufficient solution, by strengthening the anchorage during the actual correction process, the teeth to be treated are converted between the anchoring teeth and the moving teeth, and a series of intermediate initial full jaw digital models are obtained according to the transformation.
  • the invention is also based on the mature digital three-dimensional grid processing algorithm, and utilizes the acceleration function of the graphics hardware to improve the speed and stability of processing the fine tooth digital model.
  • the present invention adopts a technical solution including the following five steps:
  • the three-dimensional data of the teeth is consistent with the whole digital model of the whole jaw. This allows the teeth to move and rotate only with reference to the overall coordinate system of the digital model of the whole jaw. This is not in line with the requirement of digital oral Sakisaki. The need to move and rotate itself.
  • Cov(z,x) co (z,y) cov(z,z) Calculate the eigenvectors and eigenvalues of the covariance matrix C, sort according to the size of the eigenvalues ; define the eigenvalues according to the descending order of the eigenvalues
  • the eigenvectors are the primary, secondary, and 3-axis.
  • the movement of the teeth is interactively manipulated by motion controls around the teeth.
  • the specific performance is as follows: Six control icons with two-way arrows are drawn around the teeth, which indicate the translation in the positive/negative direction of the main axis, the translation in the positive/negative direction of the secondary axis, the translation in the positive/negative direction of the 3 axes, and the rotation around the main axis.
  • the positive direction rotates clockwise/counterclockwise, rotates clockwise/counterclockwise in the positive direction of the secondary axis, and rotates clockwise/counterclockwise around the positive direction of the 3 axes.
  • the coordinates p (x, y, z) of the current point in the three-dimensional space of the screen point are calculated by picking up the current screen coordinate point and applying the OpenGL matrix.
  • Picking point 3D space coordinates p is used to compare the motion controls to see which motion control is acting. Calculate the motion of the tooth based on the motion meaning represented by the control and the distance the mouse moves on the screen.
  • the key frame is defined as a snapshot of the state of the digital model of the full jaw tooth, in which several teeth move. Key frame addition is a key function in tooth position adjustment.
  • the key path is used to strictly define the specific path of the tooth during the movement from the initial position to the target position to plan the movement path of the entire tooth. This is a complex case that can be handled by the present invention.
  • the tooth interactive position adjustment method provided by the present invention includes operations for saving current position to key frames and selection, deletion, and the like of key frames.
  • a suitable bracketless invisible appliance with a period of 2 weeks of action should have a maximum single-step movement of the corresponding tooth of 0. 5 mm. This value can be appropriately corrected according to the patient's age, tibial density and other factors. Therefore, the smoothing interpolation decomposition is performed in order to ensure that the single-step maximum motion of the teeth does not exceed 0.5.
  • Computer automatic interpolation is based on satisfying three limit parameters: single step maximum translation, single step maximum rotation angle, single step maximum motion amount, and the method of automatically decomposing the motion amount into the initial progressive motion step.
  • the specific implementation is:
  • Translational motion interpolation direct linear interpolation
  • the formula Pi p 0 + - ( Pd - A) is used to resolve the translational motion, where , ) is the coordinates of the initial position of the tooth, n
  • the present invention adopts a quaternion linear interpolation method of quaternion, which can smoothly interpolate between two quaternions and avoids the universal lock problem.
  • Motion data verification is to ensure that the single-step movement of a single tooth does not exceed the human body's tolerance.
  • the bracketless invisible appliance prepared using this model is clinically safe and effective.
  • the selection principle of the reference point is that the maximum amount of motion of the reference point between two adjacent steps can be as close as possible to the maximum amount of motion of the tooth. For example, according to the three coordinate axes of the local coordinate system of the teeth, the vertices at the two ends of the three coordinate axes are selected, that is, the six vertices from the distal end of the tooth center are used as reference points.
  • Manual interactive fine-tuning gives the designer the opportunity to modify the initial progressive motion steps so that the motion data decomposition can be adjusted to the designer's needs to create progressive motion steps.
  • the specific modification operation needs to go through the current step data modification, the current step motion data check, the precursor step data modification, the precursor step motion data check, the subsequent step data modification, the subsequent step motion data check and the like.
  • the core idea is to ensure that the current and predecessor and subsequent single-step motion data meet the requirements of motion data verification when modifying the current single-step data to cause changes in the precursor and subsequent single-step data. 3.
  • the step of moving the teeth in step (2) is combined to obtain a series of intermediate initial full jaw digital models.
  • the digital model of the middle full jaw tooth corresponds to an appliance for the digital orthodontic method.
  • the correction plan is to rationalize the various progressive steps of the tooth to be combined with the actual situation of the case into different intermediate initial full jaw digital models.
  • a basic orthodontic approach is to use all of the teeth to be treated with a head-to-head position adjustment.
  • the digital full-tooth jaw digital model required for this treatment regimen is minimal, and the designed treatment cycle is also the shortest.
  • the actual correction process tends to deviate from the design process.
  • the patient needs to re-acquire the full-maxillary tooth data, redesign the correction plan, and finally lead to a longer time to complete the entire correction process, and more manpower and material resources. This occurs at a very high frequency when the number of teeth to be corrected in the jaw is greater than the number of teeth that need not be corrected. This is the case with all the movements of the teeth using a corrective position adjustment scheme, mainly because the importance of anchorage during the actual treatment is not taken into account.
  • the present invention provides an interface for combining the steps of the various progressive processes of the tooth, including adding an intermediate initial full-neck digital model, The intermediate initial full jaw digital model is deleted, and the operation of the single progressive motion step of the tooth to any intermediate initial full jaw digital model is placed.
  • the combination provided by the present invention is required to correct the interface of each progressive movement step of the tooth, and it should be ensured that the number of teeth in the initial digital model of the initial full-necked tooth is at least one and cannot exceed 15 at the same time.
  • the number of teeth in each of the intermediate initial lock-in tooth digital models is preferably no more than 1/2 of the number of teeth to be treated, preferably no more than 1/3 of the number of teeth to be treated.
  • the attachments are primarily designed to enhance the force, handle some special tooth movements, and assist the appliance in the movement of the teeth.
  • the elevation of the anterior teeth, the depression, the rotation of the cone or the prototype tooth, the closure of the gap in the case of extraction and the translation of the large distance of the teeth are the main applications requiring an accessory for assisted correction.
  • Attachment installation involves appliance attachment and tooth surface attachment installation.
  • the doctor installs attachments on the surface of the teeth where the case needs to be attached according to the type and size of the attachment specified in the treatment plan.
  • the appliance must contain an accessory containment compartment that can accommodate the accessory, and the accessory containment compartment tightly wraps the attachment mounted on the tooth, increasing the force exerted by the appliance on the tooth.
  • Boolean operations are implemented using Boolean operators.
  • Changes in the position of the teeth can cause changes in the gum tissue around the teeth.
  • Gingival data obtained from the calculation of gingival deformation which is more in line with tooth traction, can improve the comfort of the appliance during use and reduce the compression of the appliance on the gum tissue.
  • the process of deformation of the gums along with the movement of the teeth can improve the convenience of the doctor and the patient in the design of the treatment plan, and can intuitively show the entire treatment plan to the patient.
  • the virtual gingival free deformation is based on the tooth motion information in the correction program stage to calculate the deformation of the virtual gingival grid data, so that the middle full jaw tooth digital model contains the deformed gingival data.
  • the present invention employs a model free deformation algorithm based on the Laplacian operator.
  • the virtual gums are divided into different deformation regions, and one deformation region includes a tooth adjacent to the gum region and the boundary of two adjacent teeth as a fixed boundary of the deformation region.
  • Use the tooth movement frame to control the gum boundary, and then control the local area of the gum.
  • the overall deformation of the gums is sequentially deformed by localized areas, and the gingival deformation is finally completed.
  • Figure 2 Digital model of the complete jaw of the complete tooth segmentation in the case of maxillary gap closure in the single-maxillary correction (including maxillofacial view, lip view, left cheek view, right buccal view)
  • Figure 5 The initial initial full-tooth digital model (right buccal) of the 7-step initial position to the final position in the case of maxillary gap closure
  • Fig. 8 The triangular model of the middle full jaw tooth digital model in the seventh step of the upper jaw correction closed single jaw correction case
  • Example 1 The generation of a digital model of a full-collar tooth in a case of maxillary gap closure in a single jaw correction.
  • the teeth to be corrected are the right canine (UR3), the right second incisor (UR2), the right incisor (UR1), the left incisor (UL1), the left second incisor (UL 2 ), and the left canine (UL 3 ). ).
  • Figure 2 The digital model of the full-toothed tooth in the case of the upper jaw correction closed single-finger correction (including maxillofacial view, lip view, left cheek view, right buccal view).
  • Figure 3 The digital model of the full-maxillary tooth that completes the position adjustment in the upper jaw correction closed single-jaw correction case.
  • Figure 4 The initial initial full-tooth digital model (maxillofacial view) from the initial position to the final position in the upper maxillary gap closed single-maxillary correction case
  • Figure 5 Upper maxillary gap closed single-jaw correction From the most The initial initial full-tooth digital model (right buccal view) of the initial position to the final position of 7 steps, the change of the position of the teeth in the initial digital model of the initial full-tooth jaw in each step is shown in Table 7.
  • Table 1 shows the change of tooth position in the initial digital model of the initial full jaw tooth in the first step
  • Table 3 shows the change of tooth position in the digital model of the initial initial maxillary teeth in the third step of Table 3.
  • Table 4 shows the change of tooth position in the digital model of the initial initial maxillary teeth in the fourth step of Table 4.
  • Table 5 shows the change of tooth position in the initial digital model of the initial full jaw tooth in the fifth step of Table 5.
  • Table 6 shows the change of tooth position in the initial initial full-tooth digital model in the sixth step
  • Table 7 shows the change of tooth position in the digital initial model of the initial initial maxillary teeth in the seventh step of Table 7.
  • attachment model for enhanced orthodontic force to the left and right incisors on the digital initial model of the initial full-maxillary teeth by attachment model positioning and Boolean merging.
  • Figure 6 Upper maxillary gap closure single-jaw correction case In the example, the attachment model is mounted on the left and right second incisors in the middle initial full-maxillary tooth digital model.
  • the virtual gingival free deformation area when the tooth position changes, the virtual gingival tissue uses the Laplacian operator-based model free deformation algorithm to simulate the shape change of the actual gingival tissue, so that the post-production appliance conforms.
  • Anatomical requirements comfortable to wear.
  • the figure shows: Figure 7 The virtual jaw free deformation zone is set in the upper jaw correction closed single-jaw correction case.
  • the digital model of the middle collar tooth is materialized, and based on the physical model of the middle full jaw tooth, a series of appliances are manufactured, and the patient achieves the orthodontic treatment by wearing these appliances.
  • Figure 9 Clinical comparison before and after correction in the case of upper maxillary gap closure.

Abstract

L'invention concerne un procédé pour concevoir des étages intermédiaires de modèle dentaire numérique complet par renforcement d'un ancrage dans un processus orthodontique réel. Le procédé permet de transformer une dent qui a besoin d'être alignée entre une dent d'ancrage et une dent mobile dans le processus de conception du modèle.
PCT/CN2010/001737 2009-11-04 2010-11-01 Procede pour concevoir des etages intermediaires de modele dentaire numerique complet WO2011054177A1 (fr)

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CN200910212878.0 2009-11-04
CN200910212878.0A CN102073749B (zh) 2009-11-04 2009-11-04 设计中间全颌牙齿数字模型的方法

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103871097B (zh) * 2014-02-26 2017-01-04 南京航空航天大学 基于牙齿预备体的数据柔性融合方法
CN107038756B (zh) * 2016-02-03 2020-06-26 上海源胜文化传播有限公司 一种三维人体模型的旋转系统及方法
CN110473283B (zh) * 2018-05-09 2024-01-23 无锡时代天使医疗器械科技有限公司 牙齿三维数字模型的局部坐标系设定方法
CN109935334A (zh) * 2019-03-22 2019-06-25 杭州师范大学 使用分层的深度分布图与点集匹配的虚拟托槽交互方法
CN110403718A (zh) * 2019-07-17 2019-11-05 杭州一牙数字口腔有限公司 一种隐形矫治器用的附件生成方法
CN110930513B (zh) * 2019-11-18 2023-04-18 上海交通大学医学院附属第九人民医院 牙颌仿真模型生成方法、系统、牙齿矫治器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030219690A1 (en) * 2002-05-23 2003-11-27 Graham Neil John Orthodontic tooth repositioner
CN1686058A (zh) * 2005-04-28 2005-10-26 上海隐齿丽医学技术有限公司 计算机辅助牙齿隐形正畸系统

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1614526A (zh) * 2004-11-18 2005-05-11 华中科技大学 渐开线直齿圆锥齿轮的修形方法
US20090239188A1 (en) * 2006-06-06 2009-09-24 Reika Ortho Technologies, Inc. Changzhou Hi-Tech District Multiple Dime Transduction orthodontic devices

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030219690A1 (en) * 2002-05-23 2003-11-27 Graham Neil John Orthodontic tooth repositioner
CN1686058A (zh) * 2005-04-28 2005-10-26 上海隐齿丽医学技术有限公司 计算机辅助牙齿隐形正畸系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HU WEI ET AL.: "anchorage in the orthodontics and anchorage control", CHINESE JOURNAL OF ORTHODONTICS, vol. 6, no. ISS.3, 1999, pages 133 - 134 *

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