WO2018035838A1 - 一种测量口腔正畸力的方法和装置 - Google Patents

一种测量口腔正畸力的方法和装置 Download PDF

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WO2018035838A1
WO2018035838A1 PCT/CN2016/096852 CN2016096852W WO2018035838A1 WO 2018035838 A1 WO2018035838 A1 WO 2018035838A1 CN 2016096852 W CN2016096852 W CN 2016096852W WO 2018035838 A1 WO2018035838 A1 WO 2018035838A1
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alveolar bone
tooth
measuring
orthodontic
sensor
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PCT/CN2016/096852
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English (en)
French (fr)
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夏泽洋
甘阳洲
熊璟
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中国科学院深圳先进技术研究院
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Priority to PCT/CN2016/096852 priority Critical patent/WO2018035838A1/zh
Priority to PCT/CN2016/105474 priority patent/WO2018035985A1/zh
Publication of WO2018035838A1 publication Critical patent/WO2018035838A1/zh

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C19/00Dental auxiliary appliances
    • A61C19/04Measuring instruments specially adapted for dentistry

Definitions

  • the present application relates to orthodontics, and more particularly to a method and apparatus for measuring orthodontic forces.
  • Orthodontic orthodontics is the application of an appropriate orthodontic force to a tooth by an appliance to cause a physiological movement to correct a malocclusion.
  • the orthodontic force exerted on the teeth has a direct effect on the effect of orthodontics.
  • the direction of the orthodontic force will affect the pattern of tooth movement, and the magnitude of the orthodontic force will affect the speed of tooth movement. Excessive orthodontic forces may cause side effects such as loose teeth and root resorption.
  • Orthodontic force measurements can be divided into in vivo measurements and in vitro measurements. Because of the many limitations of in vivo measurement techniques, it is not easy to achieve, and more is the use of in vitro measurements. Existing in vitro measurement techniques use the patient's overall oral model to measure, without distinguishing the biomechanical effects of different tissues, resulting in differences in the measured data from the actual tooth's orthodontic forces.
  • the present application provides a method and apparatus for measuring orthodontic forces.
  • the present application provides a method of measuring orthodontic force, comprising: [0008] preparing an oral cavity model comprising a tooth, a periodontal ligament, and an alveolar bone, in the oral cavity model The alveolar bone of the tooth to be tested is separated from the alveolar bone of other teeth around;
  • the orthodontic force/torque is measured using the sensor.
  • the present application provides a device for measuring orthodontic force, including an oral cavity model, an appliance, a measuring rod and a sensor, the oral cavity comprising a tooth, a periodontal ligament and an alveolar bone
  • the tooth includes a crown and a root, the root is embedded in the alveolar bone, the periodontal membrane is coated on the surface of the root, and the appliance is mounted on the crown, to be tested
  • the alveolar bone of the tooth is separated from the alveolar bone of other surrounding teeth, and the sensor is fixedly attached to the alveolar bone of the tooth to be tested by the measuring rod.
  • the sensor is fixedly connected with the alveolar bone, and the periodontal membrane is considered in the measurement during orthodontic treatment.
  • the biomechanical effect of orthodontic force is measured by the orthodontic force and moment transmitted through the periodontal membrane between the tooth and the alveolar bone, so the measurement result is more accurate.
  • FIG. 1 is a flow chart of an applied method of measuring orthodontic force in an embodiment
  • FIG. 2 is a schematic view showing the structure of an apparatus for measuring an orthodontic force in an embodiment.
  • the periodontal ligament is a delivery medium for the force between the teeth and the alveolar bone.
  • the periodontal ligament is a dense connective tissue.
  • the periodontal ligament fibers have a certain elasticity and can regulate and cushion the orthodontic force.
  • the existing in vitro orthodontic force measuring method and device treats the tissues of the oral cavity as a whole, and the forces are transmitted through the rigid contact between the tissues, and the force on the teeth or the appliance is directly measured by the sensor, and the periodontal ligament is not considered.
  • the effect of tissue properties on orthodontic forces This application takes into account the biomechanical effects of teeth, periodontal ligament and alveolar bone tissue on orthodontic forces during orthodontic procedures.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the method for measuring orthodontic force of the present application includes the following steps:
  • Step 102 Preparing an oral cavity model including teeth, periodontal ligament and alveolar bone, the alveolar bone of the tooth to be tested in the oral cavity being separated from the alveolar bone of other surrounding teeth.
  • the tooth to be tested includes one or more teeth.
  • One or more of the teeth to be tested can be measured simultaneously or sequentially.
  • Step 104 The sensor is fixedly connected to the alveolar bone of the tooth to be tested. To facilitate attachment, the cavity model can be attached to the support table.
  • Step 106 Install an appliance for orthodontic treatment on the oral model.
  • Step 108 Measure the orthodontic force/torque using the sensor.
  • step 102 preparing an oral cavity model including a tooth, a periodontal ligament, and an alveolar bone, specifically comprising: [0029] Step 1022: Obtain a CT image of the patient's mouth, and obtain a three-dimensional model after processing.
  • Step 1024 The oral cavity model is obtained by 3D printing. Oral models can also be made using other processing methods.
  • the oral model is obtained from a patient's CT image by means of 3D printing or other machining, and the model is composed of teeth, periodontal ligament and alveolar bone; wherein the periodontal membrane is made of special materials. To simulate its biomechanical characteristics.
  • step 102 preparing an oral cavity model including teeth, periodontal ligament and alveolar bone, may also include: [0034] Step 1026: Obtaining a patient's oral CT image, and obtaining a three-dimensional model after processing;
  • Step 1028 The model including the teeth and the alveolar bone is printed by 3D; the model including the teeth and the alveolar bone can also be made by other processing methods.
  • Step 1010 filling the model with a periodontal membrane material to prepare an oral cavity model.
  • the alveolar bone of the tooth to be tested in the oral cavity is separated from the alveolar bone of other surrounding teeth, even if the alveolar bone of the tooth to be tested is separated from the alveolar bone of other surrounding teeth, specifically
  • the alveolar bone of the tooth to be tested and the alveolar bone of other teeth around it can be cut, or the alveolar bone of the tooth to be tested and the alveolar bone of other teeth around can be divided in a three-dimensional model.
  • Model preparation ⁇ directly prepare the model of alveolar bone bifurcation of the alveolar bone of the tooth to be tested and other surrounding teeth.
  • the sensor of the present application may include a multi-dimensional force sensor and/or a single-dimensional force sensor.
  • the multi-dimensional force sensor can be a six-dimensional force sensor or a three-dimensional force sensor.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1
  • the apparatus for measuring orthodontic force of the present application includes an oral cavity model, an appliance 21, a measuring rod 22 and a sensor 23, and the oral cavity model includes a tooth, a periodontal membrane 11 And the alveolar bone 1 2, the tooth comprises a crown 13 and a root 14, the root 14 is embedded in the alveolar bone 12, the periodontal membrane 11 is coated on the surface of the root 14, and the appliance 22 is mounted on the crown 13, to be tested
  • the alveolar bone 12 of the tooth is separated from the alveolar bone 12 of the other teeth around it, and the sensor 23 is fixedly attached to the alveolar bone 12 of the tooth to be tested by the measuring rod 22.
  • the tooth to be tested may include one or more teeth.
  • the sensor 23 of the present application may include a multi-dimensional force sensor and/or a single-dimensional force sensor.
  • the multi-dimensional force sensor may be a six-dimensional force sensor or a three-dimensional force sensor.
  • Appliance 22 includes a fixed appliance or activity Appliance.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Biophysics (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

一种测量口腔正畸力的方法和装置,包括:制备包括牙齿、牙周膜(11)和牙槽骨(12)的口腔模型,该口腔模型中的待测牙齿的牙槽骨(12)与周围其他牙齿的牙槽骨(12)分离;在口腔模型上安装用于正畸治疗的矫治器(21);将传感器(23)与待测牙齿的牙槽骨(12)固定连接,测得口腔正畸力/力矩。由于口腔模型包括牙齿、牙周膜(11)和牙槽骨(12)组织,传感器(23)与牙槽骨(12)固定连接,测量中考虑了牙周膜(11)在正畸过程中对正畸力的生物力学作用,由于测量的是经牙齿与牙槽骨(12)之间的牙周膜(11)传递后的正畸力与力矩,因此测量结果更加准确。

Description

发明名称:一种测量口腔正畸力的方法和装置 技术领域
[0001] 本申请涉及口腔正畸, 尤其涉及一种测量口腔正畸力的方法和装置。
[0002] 背景技术
[0003] 口腔正畸是通过矫治器给牙齿施加适当的正畸力, 使其产生生理性移动, 从而 矫治错颌畸形。 施加在牙齿上的正畸力对口腔正畸的效果有直接影响。 正畸力 的方向将影响牙齿移动模式, 而正畸力大小将影响牙齿移动速度。 过大的正畸 力可能引起牙齿松动、 牙根吸收等副作用。
[0004] 正畸力测量可分为体内测量和体外测量。 由于体内测量技术有许多局限性并不 易实现, 更多的是采用体外测量。 现有体外测量技术使用患者口腔整体模型进 行测量, 未区分不同组织的生物力学作用, 导致所测数据与实际牙齿所受的正 畸力存在差异。
[0005] 发明内容
[0006] 本申请提供一种测量口腔正畸力的方法和装置。
[0007] 根据本申请的第一方面, 本申请提供一种测量测量口腔正畸力的方法, 包括: [0008] 制备包括牙齿、 牙周膜和牙槽骨的口腔模型, 所述口腔模型中的待测牙齿的牙 槽骨与周围其他牙齿的牙槽骨分离;
[0009] 将传感器与所述待测牙齿的牙槽骨固定连接;
[0010] 在所述口腔模型上安装用于正畸治疗的矫治器;
[0011] 使用所述传感器测得口腔正畸力 /力矩。
[0012] 根据本申请的第二方面, 本申请提供一种测量口腔正畸力的装置, 包括口腔模 型、 矫治器、 测量杆和传感器, 所述口腔模型包括牙齿、 牙周膜和牙槽骨, 所 述牙齿包括牙冠和牙根, 所述牙根嵌设在所述牙槽骨中, 所述牙周膜包覆在所 述牙根表面, 所述矫治器安装在所述牙冠上, 待测牙齿的牙槽骨与周围其他牙 齿的牙槽骨分离, 所述传感器通过所述测量杆固定连接在所述待测牙齿的牙槽 骨上。 [0013] 由于采用了以上技术方案, 使本申请具备的有益效果在于:
[0014] 在本申请的具体实施方式中, 由于口腔模型腔模型包括牙齿、 牙周膜和牙槽骨 组织, 传感器与牙槽骨固定连接, 测量中考虑了牙周膜在正畸过程中对正畸力 的生物力学作用, 由测量的是经牙齿与牙槽骨之间的牙周膜传递后的正畸力与 力矩, 因此测量的结果更加准确。
[0015] 附图说明
[0016] 图 1为申请的测量口腔正畸力的方法在一种实施方式中的流程图;
[0017] 图 2为申请的测量口腔正畸力的装置在一种实施方式中的结构示意图。
[0018] 具体实施方式
[0019] 下面通过具体实施方式结合附图对本申请作进一步详细说明。
[0020] 在口腔组织中, 牙周膜是牙齿与牙槽骨间力的传递介质。 牙周膜是一种致密的 结缔组织, 牙周膜纤维具有一定的弹性, 能起到调节、 缓冲正畸力的作用。 现 有的体外正畸力测量方法和装置将口腔各组织视为一个整体, 各组织间通过刚 性接触进行力的传递, 直接利用传感器测量牙齿或矫治器上的力, 而未考虑牙 周膜的组织特性对正畸力的影响。 本申请综合考虑了牙齿、 牙周膜与牙槽骨组 织在正畸过程中对正畸力的生物力学作用。
[0021] 实施例一:
[0022] 如图 1所示, 本申请的测量口腔正畸力的方法, 其一种实施方式, 包括以下步 骤:
[0023] 步骤 102: 制备包括牙齿、 牙周膜和牙槽骨的口腔模型, 口腔模型中的待测牙 齿的牙槽骨与周围其他牙齿的牙槽骨分离。
[0024] 本申请中, 待测牙齿包括一颗或多颗。 一颗或多颗待测牙齿可以同吋测量, 也 可以先后测量。
[0025] 步骤 104: 将传感器与待测牙齿的牙槽骨固定连接。 为便于连接固定, 可将口 腔模型固定于支撑台上。
[0026] 步骤 106: 在口腔模型上安装用于正畸治疗的矫治器。
[0027] 步骤 108: 使用传感器测得口腔正畸力 /力矩。
[0028] 其中步骤 102中, 制备包括牙齿、 牙周膜和牙槽骨的口腔模型, 具体包括: [0029] 步骤 1022: 获取患者口腔 CT图像, 经处理后得到三维模型。
[0030] 获取患者口腔 CT图像, 经图像处理、 三维模型重构等操作得到牙齿、 牙周膜 和牙槽骨三维模型。
[0031] 步骤 1024: 经 3D打印得口腔模型。 也可以用其他加工方式制作口腔模型。
[0032] 在本实施方式中, 口腔模型来自患者的 CT图像经 3D打印或其他机加工等方式 得到, 该模型由牙齿、 牙周膜与牙槽骨组成; 其中, 牙周膜选用特殊材料用以 模拟其生物力学特点。
[0033] 其中步骤 102中, 制备包括牙齿、 牙周膜和牙槽骨的口腔模型, 也可以包括: [0034] 步骤 1026: 获取患者口腔 CT图像, 经处理后得到三维模型;
[0035] 步骤 1028: 经 3D打印得包括牙齿和牙槽骨的模型; 也可以用其他加工方式制作 包括牙齿和牙槽骨的模型。
[0036] 步骤 1010: 在模型中填充仿牙周膜材料, 制得口腔模型。
[0037] 在本申请中, 口腔模型中的待测牙齿的牙槽骨与周围其他牙齿的牙槽骨分离, 即使待测牙齿的牙槽骨从周围其他牙齿的牙槽骨中独立出来, 具体可在模型制 备完成后, 将待测牙齿的牙槽骨和周围其他牙齿的牙槽骨切割幵, 或是在三维 模型中将待测牙齿的牙槽骨和周围其他牙齿的牙槽骨分幵, 模型制备吋, 直接 制备出待测牙齿的牙槽骨和周围其他牙齿的牙槽骨分幵的模型。
[0038] 本申请的传感器可以包括多维力传感器和 /或单维力传感器。 其中多维力传感 器可以是六维力传感器或三维力传感器。
[0039] 实施例二:
[0040] 如图 2所示, 本申请的测量口腔正畸力的装置, 其一种实施方式, 包括口腔模 型、 矫治器 21、 测量杆 22和传感器 23, 口腔模型包括牙齿、 牙周膜 11和牙槽骨 1 2, 牙齿包括牙冠 13和牙根 14, 牙根 14嵌设在牙槽骨 12中, 牙周膜 11包覆在牙根 14表面, 矫治器 22安装在牙冠 13上, 待测牙齿的牙槽骨 12与周围其他牙齿的牙 槽骨 12分离, 传感器 23通过测量杆 22固定连接在待测牙齿的牙槽骨 12上。 待测 牙齿可以包括一颗或多颗。
[0041] 本申请的传感器 23, 可以包括多维力传感器和 /或单维力传感器。 其中多维力 传感器可以是六维力传感器或三维力传感器。 矫治器 22包括固定矫治器或活动 矫治器。
以上内容是结合具体的实施方式对本申请所作的进一步详细说明, 不能认定本 申请的具体实施只局限于这些说明。 对于本申请所属技术领域的普通技术人员 来说, 在不脱离本申请构思的前提下, 还可以做出若干简单推演或替换。
技术问题
问题的解决方案
发明的有益效果

Claims

权利要求书
[权利要求 1] 一种测量口腔正畸力的方法, 其特征在于, 包括:
制备包括牙齿、 牙周膜和牙槽骨的口腔模型, 所述口腔模型中的待测 牙齿的牙槽骨与周围其他牙齿的牙槽骨分离;
将传感器与所述待测牙齿的牙槽骨固定连接;
在所述口腔模型上安装用于正畸治疗的矫治器; 使用所述传感器测得口腔正畸力 /力矩。
[权利要求 2] 如权利要求 1所述的测量口腔正畸力的方法, 其特征在于, 所述制备 包括牙齿、 牙周膜和牙槽骨的口腔模型, 具体包括:
获取患者口腔 CT图像, 经处理后得到包括牙齿、 牙周膜和牙槽骨三 维模型;
经 3D打印得所述口腔模型。
[权利要求 3] 如权利要求 1所述的测量口腔正畸力的方法, 其特征在于, 所述制备 包括牙齿、 牙周膜和牙槽骨的口腔模型, 具体包括:
获取患者口腔 CT图像, 经处理后得到三维模型; 经 3D打印得包括牙齿和牙槽骨的模型;
在所述模型中填充仿牙周膜材料, 制得所述口腔模型。
[权利要求 4] 如权利要求 1所述的测量口腔正畸力的方法, 其特征在于, 所述传感 器包括多维力传感器或单维力传感器。
[权利要求 5] 如权利要求 1所述的测量口腔正畸力的方法, 其特征在于, 所述待测 牙齿包括一颗或多颗。
[权利要求 6] —种测量口腔正畸力的装置, 其特征在于, 包括口腔模型、 矫治器、 测量杆和传感器, 所述口腔模型包括牙齿、 牙周膜和牙槽骨, 所述牙 齿包括牙冠和牙根, 所述牙根嵌设在所述牙槽骨中, 所述牙周膜包覆 在所述牙根表面, 所述矫治器安装在所述牙冠上, 待测牙齿的牙槽骨 与周围其他牙齿的牙槽骨分离, 所述传感器通过所述测量杆固定连接 在所述待测牙齿的牙槽骨上。
[权利要求 7] 如权利要求 6所述的测量口腔正畸力的装置, 其特征在于, 所述传感 器包括多维力传感器或单维力传感器。
[权利要求 8] 如权利要求 6所述的测量口腔正畸力的装置, 其特征在于, 所述矫治 器包括固定矫治器或活动矫治器。
[权利要求 9] 如权利要求 6所述的测量口腔正畸力的装置, 其特征在于, 所述待测 牙齿包括一颗或多颗。
PCT/CN2016/096852 2016-08-26 2016-08-26 一种测量口腔正畸力的方法和装置 WO2018035838A1 (zh)

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