WO2012031516A1 - 定位托盘的制造方法及制造该定位托盘的带定位钩托槽 - Google Patents

定位托盘的制造方法及制造该定位托盘的带定位钩托槽 Download PDF

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WO2012031516A1
WO2012031516A1 PCT/CN2011/078037 CN2011078037W WO2012031516A1 WO 2012031516 A1 WO2012031516 A1 WO 2012031516A1 CN 2011078037 W CN2011078037 W CN 2011078037W WO 2012031516 A1 WO2012031516 A1 WO 2012031516A1
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positioning
bracket
manufacturing
positioning hook
hook bracket
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PCT/CN2011/078037
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English (en)
French (fr)
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黄伟红
林久祥
王红卫
李祖安
林凤燕
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广州瑞通生物科技有限公司
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Application filed by 广州瑞通生物科技有限公司 filed Critical 广州瑞通生物科技有限公司
Priority to JP2013527458A priority Critical patent/JP2013537051A/ja
Priority to US13/812,658 priority patent/US20130122443A1/en
Priority to EP11823039.0A priority patent/EP2614791A4/en
Publication of WO2012031516A1 publication Critical patent/WO2012031516A1/zh

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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
    • A61C7/002—Orthodontic computer assisted systems
    • 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
    • A61C7/02—Tools for manipulating or working with an orthodontic appliance
    • 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
    • A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
    • A61C7/14—Brackets; Fixing brackets to 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
    • A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
    • A61C7/14—Brackets; Fixing brackets to teeth
    • A61C7/146—Positioning or placement of brackets; Tools therefor
    • 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
    • A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
    • A61C7/20—Arch wires
    • 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
    • A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
    • A61C7/28—Securing arch wire to bracket
    • A61C7/30—Securing arch wire to bracket by resilient means; Dispensers therefor
    • A61C7/303—Elastic bands
    • 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
    • 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
    • A61C7/12—Brackets; Arch wires; Combinations thereof; Accessories therefor
    • A61C7/14—Brackets; Fixing brackets to teeth
    • A61C7/145—Lingual brackets

Definitions

  • the invention relates to a method for manufacturing an individualized orthodontic appliance positioning tray in stomatology and a positioning hook bracket for manufacturing the positioning tray.
  • Individual orthodontic appliances are generally composed of brackets, archwires, elastic pressure rings and resin fillers that are matched with different lingual tooth surfaces.
  • Each bracket is designed according to the actual tooth shape of the patient. Out, the one side of the bracket is in close contact with the lingual tooth surface of the patient, and the other side is provided with a groove.
  • the arch line connects the respective brackets through the groove, and the two are relatively fixed by the elastic pressing ring, and then The bracket, the bow line and the tooth surface will be injected with different amounts of resin filler according to the actual fit to increase the orthodontic effect.
  • the patient's teeth will slowly be corrected to the required one during the long-term running-in process because the bracket fits both the tooth surface and the archwire.
  • Ideal tooth type Therefore, the individualized orthodontic appliance requires high precision in the position of the fitted tooth surface. Therefore, when the individualized orthodontic appliance is installed for the patient, the auxiliary positioning tool such as the positioning tray is needed.
  • the positioning tray is made according to the shape of the individualized orthodontic appliance and the actual tooth shape of the patient. In use, each bracket is correspondingly embedded in the concave recess of the positioning tray, and then the positioning tray is buckled on the patient's teeth to assist in positioning the respective brackets, and finally the brackets are formed in series by the archwire and the elastic pressing ring.
  • the positioning tray There are two methods for manufacturing the positioning tray. One is to manually place the bracket on the original dental mold and press the positioning tray after the original dental mold is obtained. This method has a high curvature of the incisor and the molar. It is relatively easy to find the exact position of the tooth surface, but it is difficult to manually find a suitable fitting position for a smooth tooth surface with a low curvature of the canine; another method is to draw the original using a computer. A three-dimensional digital model in which the dental mold and the appliance are accurately matched, and then the model is manufactured as a whole, and then the whole model is used for lamination to manufacture a positioning tray, and then a three-dimensional digital model of the appliance is used to produce another The finished product of the appliance. This method is costly and has a long manufacturing cycle. Therefore, it is necessary to improve the above problems.
  • the object of the present invention is to provide a method for manufacturing a positioning tray and a positioning hook bracket for manufacturing the positioning tray.
  • the manufacturing method can not only realize the production of the positioning tray, but also ensure high-precision fit between the appliance and the tooth surface. Moreover, the process cost is low and the operation is convenient.
  • the present invention also provides a belt positioning hook bracket for manufacturing the above positioning tray.
  • a method of manufacturing a positioning tray comprising the steps of:
  • the surface-treated blank with the positioning hook bracket is assembled onto the original dental mold, and the film is pressed on the basis of the assembly, thereby obtaining a positioning tray.
  • the method for converting an ideal dental model into a three-dimensional digital model by using a computer in step 2) comprises measuring a desired dental model with a scanner, thereby converting into a three-dimensional digital model recognizable by a computer, or The patient's teeth were scanned by beam CT to obtain the dentition data, and the three-dimensional digital model of the teeth was established by reverse engineering.
  • the method for manufacturing a wax type with a positioning hook bracket in the step 4) comprises: layering a three-dimensional digital model with a positioning hook bracket by using a slicing software to obtain a layered cross section.
  • the two-dimensional model is then made with a wax-type mechanism to make a wax pattern with a positioning hook bracket according to the two-dimensional model.
  • the thickness of the layered section is 15 ⁇ 50 ⁇ m, and the manufacturing precision is controlled by the interlayer cumulative error compensation method.
  • the positioning hook has a thickness of 0.3 to 0.6 mm.
  • the number of positioning hooks respectively provided on each of the bracket bodies is two.
  • the surface treatment of the blank in the step 5) includes polishing, electrolysis, and detection of groove precision.
  • the positioning tray manufacturing method further comprises the step of removing the positioning hook from the positioning hook bracket after the positioning tray is formed by lamination.
  • a positioning hook bracket for manufacturing a positioning tray the belt positioning hook bracket having a plurality of positioning hooks that are attached to the crown of the corresponding tooth.
  • the number of the positioning hooks is two.
  • the invention has the beneficial effects that the present invention introduces an intermediate step of making a positioning hook in the traditional step of making a three-dimensional digital model of the bracket, so that the bracket itself is in the stage of only the three-dimensional digital model in the entire design flow. That is, it has the function of positioning by the positioning hook to accurately fit the ideal dental mold, so that only the wax type with the positioning hook bracket is required, and the positioning hook bracket is cast with the wax type as the core, and the After the positioning hook bracket is matched with the original dental mold, the molding reference of the pressing positioning tray can be obtained, and the bracket and the original dental mold need not be integrally cast as the molding reference, thereby greatly reducing the production cost.
  • the positioning hook bracket which is completely matched with the original dental mold and the positioning tray can be obtained, and the finished appliance can be produced immediately, without separately casting the bracket, so that This saves costs and shortens the production cycle.
  • FIG. 1 is a schematic view of a single shaft with a positioning hook bracket made in the present invention
  • Figure 2 is a schematic view showing the assembly of the positioning hook bracket and the tooth in the present invention
  • FIG. 3 is a schematic view showing the positioning of the positioning tray produced in the present invention.
  • Fig. 4 is a schematic view showing the shape of the non-positioning hook bracket formed in the present invention.
  • a method of manufacturing a positioning tray includes the following steps:
  • a plurality of positioning hooks 12 are correspondingly drawn on the three-dimensional digital model of each of the bracket bodies 11, and the positioning hooks 12 are located in the crown direction of the corresponding bracket body 11. And the bracket hook body 1 is formed together with the bracket body 11 so that the belt positioning hook bracket 1 is accurately attached to the corresponding tooth surface 3 by means of the positioning hook 12;
  • the three-dimensional digital model with the positioning hook bracket 1 is introduced into the wax type machine to produce a wax type with the positioning hook bracket 1;
  • the surface-treated blank with the positioning hook bracket 1 is assembled onto the original dental mold, and the film is pressed on the basis of the assembly, thereby obtaining a positioning tray.
  • the method for converting an ideal dental model into a three-dimensional digital model by using a computer in the step 2) comprises measuring the ideal dental mold with a scanner, thereby converting into a three-dimensional digital model that can be recognized by a computer, or adopting The beam CT scans the patient's teeth to obtain the dentition data, and then uses the reverse engineering method to establish a three-dimensional digital model of the teeth.
  • the method of manufacturing the wax type with the positioning hook bracket 1 in the step 4) comprises using the slicing software to structurally layer the three-dimensional digital model with the positioning hook bracket 1 to obtain each layer.
  • a two-dimensional model of the cross section, and then a wax type with a positioning hook bracket 1 is made by a wax-type mechanism according to the two-dimensional model.
  • the thickness of the layered section is 15 ⁇ 50 ⁇ m, and the manufacturing precision is controlled by the inter-layer cumulative error compensation method.
  • the positioning hook 12 has a thickness of 0.3 to 0.6 mm.
  • different thicknesses can be selected according to different materials, and generally the thickness of the bracket body 11 can be the same.
  • the number of the positioning hooks 11 respectively provided on the respective bracket bodies 11 is two.
  • the surface treatment of the blank in the step 5) includes polishing, electrolysis, and detection of groove precision.
  • the positioning tray manufacturing method further comprises the step of removing the positioning hook 12 from the belt positioning hook bracket 1 after the positioning tray is formed by lamination.
  • the number of the positioning hooks 12 is two.
  • the ideal dental model is measured by a scanner, and then the scanned data is input into a computer, and the data is automatically converted into an ideal dental model STL model by a conversion software matched with the scanner, and drawn on each tooth of the model. a three-dimensional model of each of the bracket bodies 11 corresponding thereto;
  • the tool three-dimensional drawing software correspondingly draws two positioning hooks 12 with a thickness of 0.3 mm on the STL model of each bracket body 11, the positioning hooks 12 are located on the mating surfaces of the corresponding bracket bodies 11, and the bracket body 11 together with the positioning hook bracket 1 , so that the positioning hook bracket 1 is accurately attached to the corresponding tooth surface 3 by means of the positioning hook 12;
  • the surface-treated positioning hook bracket 1 conforming to the precision requirement is assembled onto the original dental mold, and the film is pressed with methacrylic acid based on the assembly, thereby obtaining a positioning tray finished product;
  • the positioning hook bracket 2 is obtained, and the positioning hook bracket 2 is polished and polished, and then assembled with the archwire and the elastic pressing ring. , an individualized orthodontic appliance matching the positioning tray is produced.

Description

定位托盘的制造方法及制造该定位托盘的带定位钩托槽
技术领域
本发明涉及一种口腔医学中的个体化正畸矫治器定位托盘的制造方法及制造该定位托盘的带定位钩托槽。
背景技术
目前，越来越多患者选择个体化正畸矫治器作为牙齿正畸的矫治设备。个体化正畸矫治器一般由各个与不同舌侧牙面配合的托槽、弓线、弹性压圈和树脂填充物组成，每个托槽是根据患者的实际牙型一颗一颗相应地设计出来的，托槽的一面贴紧患者的舌侧牙面，另一面设有沟槽，所述弓线穿过沟槽将各个托槽连接起来，用弹性压圈将两者相对固定，然后在托槽、弓线和牙面之间会根据实际贴合的情况再注入不同量的树脂填充物，增加正畸效果。患者口腔在装了这种个体化正畸矫治器后，由于托槽既与牙面贴合，又在弓丝上滑动，患者的牙齿便会在长期的磨合过程中慢慢地矫正成需要的理想牙型。因此，个体化正畸矫治器对贴合牙面位置精度要求很高，故在替患者装上个体化正畸矫治器时，需要用到定位托盘这种辅助定位工具。定位托盘是根据个体化正畸矫治器与患者的实际牙型配合后的形状制作出来的。使用时，将各个托槽对应嵌入定位托盘的牙型凹位中，再将定位托盘扣压在患者的牙齿上来辅助定位各个托槽，最后用弓丝和弹性压圈将托槽串接成型。现在制造定位托盘的方法有两种，一种是取得患者的原始牙模后，手工将托槽放置在原始牙模上压制定位托盘，这种方法对于切牙和磨牙这种曲率高的牙面，能比较容易地找到准确的牙面贴合位置，但对尖牙这种曲率低的平滑的牙面，就很难手工找到一个适合的贴合位置；另一种方法是利用计算机绘制出原始牙模与矫治器准确配合后的三维数字模型，然后将该模型作为一个整体制造出来，再利用这个整体模型进行压膜，制造出定位托盘，之后再依靠矫治器的三维数字模型，另外生产出矫治器的成品。这种方法成本高，制造周期长。因此有必要对上述问题进行改进。
发明内容
本发明的目的，是为了提供一种定位托盘的制造方法及制造该定位托盘的带定位钩托槽，这种制造方法不仅能实现生产出来定位托盘能保证矫治器与牙面高精度贴合，而且其工艺成本低廉，操作方便。
本发明还提供一种用于制造上述定位托盘的带定位钩托槽。
本发明解决其技术问题的解决方案是：
一种定位托盘的制造方法，包括以下步骤：
1）、取得患者的两付以上牙模，并对其中一副牙模进行排牙作为理想牙模，剩余的牙模作为原始牙模；
2）、用计算机将理想牙模转化为三维数字模型，并在该模型的各个牙齿上绘制其所对应的各个托槽本体的三维数字模型；
3）、以理想牙模的齿面为基础，在各个托槽本体的三维数字模型上对应地绘制若干个定位钩，所述定位钩位于对应的托槽本体的牙冠方向上，并与托槽本体一起构成带定位钩托槽，使所述带定位钩托槽依靠定位钩与相应的牙面准确贴合；
4）、将带定位钩托槽的三维数字模型导入蜡型机中，制作出带定位钩托槽的蜡型；
5）、以所述蜡型为模具型芯，铸造出带定位钩托槽的毛坯，并对该毛坯作表面处理；
6）、将经表面处理后的带定位钩托槽的毛坯装配到原始牙模上，并以该装配体为基准进行压膜，即得到定位托盘。
作为上述技术方案的进一步改进，步骤2）中用计算机将理想牙模转化为三维数字模型的方法包括将用扫描仪对理想牙模进行测量，从而转化成可供计算机识别的三维数字模型，或者采用束状CT扫描患者的牙齿得到齿系数据，再用反求工程的方法建立牙齿的三维数字模型。
作为上述技术方案的进一步改进，步骤4）中制作出带定位钩托槽的蜡型的方法，包括运用切片软件对带定位钩托槽的三维数字模型进行结构分层，得到各个分层截面的二维模型，再根据所述的二维模型用蜡型机制作出带定位钩托槽的蜡型。
作为上述技术方案的进一步改进，在运用切片软件对带定位钩托槽的三维数字模型进行结构分层时，取分层截面厚度为15~50μm，并采用层间累计误差补偿方式控制制造精度。
作为上述技术方案的进一步改进，所述定位钩的厚度为0.3~0.6mm。
作为上述技术方案的进一步改进，所述各个托槽本体上各自配有的定位钩的数量为两个。
作为上述技术方案的进一步改进，步骤5）中对毛坯作的表面处理包括抛光、电解以及检测槽沟精密度。
作为上述技术方案的进一步改进，所述的定位托盘制造方法还包括在定位托盘压膜成型后，将定位钩从带定位钩托槽上面去掉的步骤。
一种制造定位托盘的带定位钩托槽，所述带定位钩托槽具有若干个挂靠在对应牙齿的牙冠上的定位钩。
作为上述技术方案的进一步改进，所述定位钩的数量为两个。
本发明的有益效果是：本发明在传统的制作托槽三维数字模型的步骤中，引入制作定位钩这一中间步骤，使得整个设计流程中，在仅处于三维数字模型的阶段时，托槽本身即具有依靠定位钩定位从而与理想牙模准确贴合的功能，因此只需制作出带定位钩托槽的蜡型，并以该蜡型为型芯铸出带定位钩托槽，将所述带定位钩托槽与原始牙模配合后，即可得到压制定位托盘的制模基准，无需将托槽与原始牙模整体铸出来作为制模基准，极大地减少了生产的成本。而将带定位钩托槽的定位钩剪除后，即可得到与原始牙模和定位托盘完全匹配的无定位钩托槽，马上即可制作出矫治器成品，无需单独另外再铸造托槽，这样便节省了成本和缩短了生产周期。
附图说明
下面结合附图对本发明作进一步说明：
图1是本发明中制作出来的单个带定位钩托槽的轴测示意图；
图2是本发明中的带定位钩托槽与牙齿的装配示意图；
图3是本发明中制作出来的定位托盘轴测示意图；
图4是本发明中制作出来的无定位钩托槽形状示意图。
具体实施方式
参照图1～图4，一种定位托盘的制造方法，包括以下步骤：
1）、取得患者的两付以上牙模，并对其中一副牙模进行排牙作为理想牙模，剩余的牙模作为原始牙模；
2）、用计算机将理想牙模转化为三维数字模型，并在该模型的各个牙齿上绘制其所对应的各个托槽本体11的三维数字模型；
3）、以理想牙模的齿面为基础，在各个托槽本体11的三维数字模型上对应地绘制若干个定位钩12，所述定位钩12位于对应的托槽本体11的牙冠方向上，并与托槽本体11一起构成带定位钩托槽1，使所述带定位钩托槽1依靠定位钩12与相应的牙面3准确贴合；
4）、将带定位钩托槽1的三维数字模型导入蜡型机中，制作出带定位钩托槽1的蜡型；
5）、以所述蜡型为模具型芯，铸造出带定位钩托槽1的毛坯，并对该毛坯作表面处理；
6）、将经表面处理后的带定位钩托槽1的毛坯装配到原始牙模上，并以该装配体为基准进行压膜，即得到定位托盘。
作为上述技术方案的进一步改进，步骤2）中用计算机将理想牙模转化为三维数字模型的方法包括用扫描仪对理想牙模进行测量，从而转化成可供计算机识别的三维数字模型，或者采用束状CT扫描患者的牙齿得到齿系数据，再用反求工程的方法建立牙齿的三维数字模型。
作为上述技术方案的进一步改进，步骤4）中制作出带定位钩托槽1的蜡型的方法，包括运用切片软件对带定位钩托槽1的三维数字模型进行结构分层，得到各个分层截面的二维模型，再根据所述的二维模型用蜡型机制作出带定位钩托槽1的蜡型。
作为上述技术方案的进一步改进，在运用切片软件对带定位钩托槽1的三维数字模型进行结构分层时，取分层截面厚度为15~50μm，并采用层间累计误差补偿方式控制制造精度。
作为上述技术方案的进一步改进，所述定位钩12的厚度为0.3~0.6mm。其中，因应选用材料的不同可选择不同的厚度，一般可以托槽本体11的厚度相同。
作为上述技术方案的进一步改进，所述各个托槽本体11上各自配有的定位钩11的数量为两个。
作为上述技术方案的进一步改进，步骤5）中对毛坯作的表面处理包括抛光、电解以及检测槽沟精密度。
作为上述技术方案的进一步改进，所述的定位托盘制造方法还包括在定位托盘压膜成型后，将定位钩12从带定位钩托槽1上面去掉的步骤。
一种制造定位托盘的带定位钩托槽，所述带定位钩托槽具有若干个挂靠在对应牙齿的牙冠上的定位钩12。
作为上述技术方案的进一步改进，所述定位钩12的数量为两个。
以下是本发明中的定位托盘的制造方法的一个实例：
1、用印模材料取得患者的两付以上牙模，并对按照正畸治疗方案对其中一副牙模进行排牙，作为理想牙模，剩余的牙模作为原始牙模；
2、用扫描仪对理想牙模进行测量，然后扫描得到的数据输入计算机，通过扫描仪配套的转换软件将所述数据自动转化成理想牙模的STL模型，并在该模型的各个牙齿上绘制其所对应的各个托槽本体11的三维模型；
3、以理想牙模的齿面为基础，使用Clay Tool三维绘图软件在各个托槽本体11的STL模型上对应地绘制两个厚度为0.3mm的定位钩12，所述定位钩12位于对应的托槽本体11的啮合面上，并与托槽本体11一起构成带定位钩托槽1，使所述带定位钩托槽1依靠定位钩12与相应的牙面3准确贴合；
4、将带定位钩托槽1的STL模型导入DLP快速蜡型机中，使用配套的切片软件对该STL模型进行结构分层，并取分层截面厚度为15μm，同时采用层间累计误差补偿方式控制制造精度在25μm，最后用树脂材料制作出带定位钩托槽1的蜡型；
5、用带定位钩托槽1的蜡型作为型芯，以钛合金为浇铸材料，作精度为10μm的精密铸造，从而制造出带定位钩托槽1的毛坯，并对该毛坯进行抛光、电解以及检测槽沟精密度，若精密度不够，则返工直至符合要求；
6、将经表面处理后的符合精度要求的带定位钩托槽1装配到原始牙模上，并以该装配体为基准，用甲基丙烯酸进行压膜，即得到定位托盘成品；
7、用细嘴剪将带定位钩托槽1的各个定位钩11剪掉。
以下是本发明中用于制造该定位托盘的带定位钩托槽的一个实例：
用细嘴剪将带定位钩托槽1的各个定位钩11剪掉后，得到无定位钩托槽2，并对无定位钩托槽2进行打磨和抛光，然后与弓丝、弹性压圈装配，制作出与所述定位托盘相匹配的个体化正畸矫治器。
以上是对本发明的较佳实施进行了具体说明，但本发明创造并不限于所述实施例，熟悉本领域的技术人员在不违背本发明精神的前提下还可作出种种的等同变形或替换，这些等同的变型或替换均包含在本申请权利要求所限定的范围内。

Claims (10)

  1. 一种定位托盘的制造方法，其特征在于：包括以下步骤：
    1）、取得患者的两付以上牙模，并对其中一副牙模进行排牙作为理想牙模，剩余的牙模作为原始牙模；
    2）、用计算机将理想牙模转化为三维数字模型，并在该模型的各个牙齿上绘制其所对应的各个托槽本体（11）的三维数字模型；
    3）、以理想牙模的齿面为基础，在各个托槽本体（11）的三维数字模型上对应地绘制若干个定位钩（12），所述定位钩（12）位于对应的托槽本体（11）的牙冠方向上，并与托槽本体（11）一起构成带定位钩托槽（1），使所述带定位钩托槽（1）依靠定位钩（12）与相应的牙面准确贴合；
    4）、将带定位钩托槽（1）的三维数字模型导入蜡型机中，制作出带定位钩托槽（1）的蜡型；
    5）、以所述蜡型为模具型芯，铸造出带定位钩托槽（1）的毛坯，并对该毛坯作表面处理；
    6）、将经表面处理后的带定位钩托槽（1）的毛坯装配到原始牙模上，并以该装配体为基准进行压膜，即得到定位托盘。
  2. 根据权利要求1所述的定位托盘的制造方法，其特征在于：步骤2）中用计算机将理想牙模转化为三维数字模型的方法包括用扫描仪对理想牙模进行测量，从而转化成可供计算机识别的三维数字模型，或者采用束状CT扫描患者的牙齿得到齿系数据，再用反求工程的方法建立牙齿的三维数字模型。
  3. 根据权利要求1所述的定位托盘的制造方法，其特征在于：步骤4）中制作出带定位钩托槽（1）的蜡型的方法，包括运用切片软件对带定位钩托槽（1）的三维数字模型进行结构分层，得到各个分层截面的二维模型，再根据所述的二维模型用蜡型机制作出带定位钩托槽（1）的蜡型。
  4. 根据权利要求3所述的定位托盘的制造方法，其特征在于：在运用切片软件对带定位钩托槽（1）的三维数字模型进行结构分层时，取分层截面厚度为15~50μm，并采用层间累计误差补偿方式控制制造精度。
  5. 根据权利要求1所述的定位托盘的制造方法，其特征在于：所述定位钩（12）的厚度为0.3~0.6mm。
  6. 根据权利要求1所述的定位托盘的制造方法，其特征在于：所述各个托槽本体（11）上各自配有的定位钩（11）的数量为两个。
  7. 根据权利要求1所述的定位托盘的制造方法，其特征在于：步骤5）中对毛坯作的表面处理包括抛光、电解以及检测槽沟精密度。
  8. 根据权利要求1所述的定位托盘的制造方法，其特征在于：所述的定位托盘制造方法还包括在定位托盘压膜成型后，将定位钩（12）从带定位钩托槽（1）上面去掉的步骤。
  9. 一种制造定位托盘的带定位钩托槽，其特征在于：所述带定位钩托槽具有若干个挂靠在对应牙齿的牙冠上的定位钩（12）。
  10. 根据权利要求8所述的制造定位托盘的带定位钩托槽，其特征在于：所述定位钩（12）的数量为两个。
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