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WO2021056367A1 - Bridge dentaire multi-trous personnalisé basé sur un mode de traitement additif ou soustractif, et procédé de fabrication de celui-ci - Google Patents

Bridge dentaire multi-trous personnalisé basé sur un mode de traitement additif ou soustractif, et procédé de fabrication de celui-ci Download PDF

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Publication number
WO2021056367A1
WO2021056367A1 PCT/CN2019/108321 CN2019108321W WO2021056367A1 WO 2021056367 A1 WO2021056367 A1 WO 2021056367A1 CN 2019108321 W CN2019108321 W CN 2019108321W WO 2021056367 A1 WO2021056367 A1 WO 2021056367A1
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WO
WIPO (PCT)
Prior art keywords
dental bridge
model
bridge
positioning
manufacturing
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2019/108321
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English (en)
Chinese (zh)
Inventor
张锦阳
张潇
张锦鹏
李买生
何婧妍
卢修远
陈贤帅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GUANGZHOU JIANCHI BIOTECHNOLOGY Co Ltd
Original Assignee
GUANGZHOU JIANCHI BIOTECHNOLOGY Co Ltd
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 GUANGZHOU JIANCHI BIOTECHNOLOGY Co Ltd filed Critical GUANGZHOU JIANCHI BIOTECHNOLOGY Co Ltd
Priority to PCT/CN2019/108321 priority Critical patent/WO2021056367A1/fr
Publication of WO2021056367A1 publication Critical patent/WO2021056367A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same

Definitions

  • the present invention relates to the technical field of medical supplies, and in particular to a customized porous dental bridge based on a processing method of adding and subtracting materials, and a method for manufacturing the porous dental bridge.
  • This advanced dental implant restoration method can reduce the implantation of dental implants, reduce the risk of dental implant restoration, and save costs for patients.
  • Bridge restoration is a method of denture restoration technology. It mainly uses natural teeth or implants at the two ends or one end of the missing tooth gap as abutments. The retainers of the denture are made on the abutment and connected with the artificial teeth. As a whole, the denture crown is cemented on the bridge with cement, and the patient cannot remove it by himself. This kind of restoration method can fill the missing position of the tooth, prevent the displacement of adjacent teeth, avoid irregular teeth and abnormal occlusion, and restore the chewing, pronunciation and appearance of the teeth.
  • Dental bridge is a kind of dental restoration with aesthetic effect. It has the advantages of hardness, wear resistance and high compressive strength. It can be made of gold, alloy, porcelain or a combination of these materials. The required supporting force is natural teeth or implants. Body provided.
  • the traditional methods of making dental bridges are wax casting (additive material) and cutting processing (subtractive material).
  • the wax casting method relies heavily on manual operations and usually takes 3-7 days to complete. The process is cumbersome, time-consuming, and the yield is low. , hardly affect the aesthetics of dental implants, and even surface defects (such as trachoma shrinkage, etc.).
  • the cutting manufacturing method greatly saves time and labor, and ensures the accuracy of the shape and size of the bridge, it can only process the bridge with a relatively regular shape and structure, and the finished bridge is heavier and has a modulus of elasticity. It is high, which is quite different from the bone tissue, and the pressure on the patient's alveolar bone after implantation in the oral cavity is greater, which will cause discomfort to the patient.
  • the dental bridge in the prior art can only be manufactured by a processing method of adding or subtracting materials, the manufactured dental bridge may have defects corresponding to the processing method.
  • the purpose of the present invention is to provide a customized porous dental bridge manufacturing method based on the increase and decrease of material processing method, which realizes the increase and decrease of material manufacturing of the bridge through metal 3D printing and CNC cutting processing, and solves the problem of manufacturing bridges in the prior art. The flaws that exist.
  • a method for manufacturing a customized porous dental bridge based on a processing method of adding and subtracting materials includes the following steps:
  • the digital model of dental bridge includes digital model of dental bridge and several digital models of positioning support rods. Import interface data to determine the digital model of dental bridge. A single-sided and/or bilateral positioning support rod digital model is added to the abutment.
  • the positioning support rod digital model includes a positioning boss and a support rod. The outer contour of the positioning boss is a regular polygon with a surface and a bottom surface penetrating through the middle. The two ends of the support rod are respectively connected with the digital model of the dental bridge and the positioning boss;
  • step 3 Perform porous treatment on the dental bridge STL digital model prepared in step 2: Fill the crown without implant on the upper part of the bridge shoulder with porous structure, the filling volume is 50% to 70%, and the pore diameter is 0.5mm to 1mm;
  • step 5 Import the STP solid model into ANSYS Workbench software for finite element analysis, and perform a simulation analysis of the force and stress distribution of the STP solid model under the load of bite force. According to whether the simulation analysis result meets the requirements for use, if it does not meet the requirements for use Then return to step 3 to correct the filling volume and/or pore size of the porous structure of the bridge STL digital model;
  • step 6 Perform metal 3D printing on the STP solid model in step 5 that meets the requirements for use, heat treatment, and remove the printing support to obtain a semi-finished bridge with positioning support rods;
  • the semi-finished bridge is fixed on the processing fixture, and the end surface and the inner taper hole of the interface of the implant site of the semi-finished dental bridge are processed accurately by the CNC machine, and then the positioning is removed Support rod, get customized porous dental bridge.
  • the method for obtaining the oral environment model and the scanning rod model in step 1 includes an oral silicone inverted mold or wearing a mouth scan scanning rod.
  • the positioning boss in step 2 is a regular hexagon, and the diameter of the through hole is 2 to 3 mm.
  • the porous structure is a diamond cubic crystal structure;
  • the filling method includes filling without shell and filling with shell; preferably, the thickness of the shell filled with shell is 0.5-0.8 mm.
  • the STL digital model of the dental bridge described in step 4 undergoes correction processing before conversion and output.
  • the surface of the processing fixture is provided with positioning holes corresponding to the number and positions of the positioning bosses, and the through holes of the positioning bosses are threadedly fixed with bolts.
  • the present disclosure also provides a customized semi-finished porous dental bridge, including:
  • positioning support rods formed by metal 3D printing, including positioning bosses and support rods.
  • the outer contour of the positioning bosses is a regular polygon with a through hole passing through the surface and the bottom surface.
  • the two ends of the support rods are respectively connected The dental bridge and the positioning boss.
  • a customized porous dental bridge After the semi-finished customized porous dental bridge is cut by a CNC machine tool and the positioning support rod is removed, a customized porous dental bridge can be obtained.
  • the use of metal 3D printing and CNC cutting to achieve the increase and decrease of material manufacturing of the dental bridge can add a porous structure in the additive preparation process, so that the dental bridge can meet the requirements of use strength while effectively reducing its elastic modulus;
  • a positioning support rod as a transitional component is added during the additive preparation process. Through the cooperation of the positioning support rod and the machining fixture, the semi-finished dental bridge is clamped on the CNC machine tool to realize the high-precision processing of the dental bridge implant position interface.
  • Figure 1 is a process flow diagram of a customized porous dental bridge manufacturing method based on adding and subtracting material processing methods
  • Example 2 is a three-dimensional schematic diagram of the oral environment model and the scanning rod model described in step 1 in Example 1;
  • FIG. 3 is a three-dimensional schematic diagram of the dental bridge STL digital model described in step 2 in Example 1;
  • FIG. 4 is a three-dimensional schematic diagram of the STL digital model of the dental bridge after the porous treatment in step 3 in Example 1;
  • Example 5 is a schematic diagram of the semi-finished dental bridge described in step 7 in Example 1 being fixed on a processing fixture.
  • the customized porous bridge is manufactured.
  • Step 1 Invert the patient’s mouth with a silicone mold, then scan to obtain the dental model and the scanning rod model, and finally obtain the interface data of the implant position through the digital matching of the scanning rod model; or obtain the oral digital model by wearing the mouth scan scanning rod, and then pass The scanning rod model is digitally matched to obtain the interface data of the implant position. as shown in picture 2.
  • Step 2 Using the interface data obtained in step 1, use Magics software to design the dental bridge model, and then design unilateral and bilateral positioning support rods at the bridge shoulders that are separated by single teeth, as shown in Figure 3, to facilitate the teeth Subsequent finishing of the bridge.
  • the rear end of the positioning support rod is provided with a regular hexagonal positioning boss, the width of the opposite side of the hexagonal boss is 4mm-6mm; the center of the boss is provided with a through hole with a diameter of 2mm-3mm.
  • the hexagonal positioning boss of the dental bridge positioning support rod is matched with the regular hexagonal concave platform of the fixture, and then the screw is passed through the through hole of the hexagonal positioning boss of the positioning support rod to lock the bridge and the fixture. And fixed together.
  • Step 3 Using the dental bridge STL model obtained in Step 2, fill the crown of the dental bridge model with no interface position on the upper part of the shoulder with the porous structure of diamond cubic crystals, the filling volume is 50% to 70%, and the pore size is 0.5mm to 1mm ;
  • the filling method includes two ways of filling without shell and filling with shell.
  • the thickness of the shell under the filling method with shell is 0.5 ⁇ 0.8mm. As shown in Figure 4.
  • Step 4 Correct the STL model of the diamond porous bridge obtained in Step 3, specifically repairing the wrong triangular faces (such as triangular face overlap, gap, normal error, holes, etc.), and passing the STL model Simplify the mesh with multiple triangular faces, and then use Solidworks software to convert the SLT model and output it as a solid model in STP format;
  • Step 5 Import the STP format model obtained in step 4 into ANSYS Workbench software for FEA analysis, simulate the porous bridge under the load of occlusal force (or the inner porous bridge with shell filling), and analyze the force and stress distribution , According to the results of simulation analysis, judge whether it is necessary to optimize the structure of the porous bridge. If necessary, return to step 3 to modify and optimize the filling volume, pore size and other parameters of the porous structure of the bridge;
  • Step 6 Perform metal 3D printing on the porous dental bridge finalized in Step 5, and then perform heat treatment to eliminate defects in the bridge material and tissue, and finally remove the support left by the 3D printing;
  • Step 7 In order to further ensure the high-precision cooperation between the dental bridge interface and the patient's implant position interface, the porous dental bridge printed in step 6 is fixed to a fixture designed to match it through positioning support rods, as shown in Figure 5. A CNC machine tool is used to finish machining the end face and inner cone of the interface. After finishing, the porous bridge interface can perfectly match the implant in the patient's mouth.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)

Abstract

L'invention concerne un bridge dentaire multi-trous personnalisé basé sur un mode de traitement additif ou soustractif et un procédé de fabrication de celui-ci. Le procédé de fabrication comprend les étapes suivantes : 1) obtention d'un modèle d'environnement buccal et d'un modèle de pilier de balayage pour obtenir des données de connecteur de site d'implant ; 2) fabrication d'un modèle numérique STL de bridge dentaire ; 3) formation de multiples trous dans le modèle numérique STL de bridge dentaire ; 4) conversion du modèle numérique STL de bridge dentaire obtenu à l'étape 3 et délivrance en sortie de celui-ci en tant que modèle solide STP ; 5) réalisation d'une analyse par éléments finis sur le modèle solide STP ; 6) moulage du modèle solide STP dans l'étape 5 au moyen d'une impression 3D métallique pour obtenir un produit de bridge dentaire semi-fini ; et 7) réalisation d'un usinage de précision sur une face d'extrémité et un trou de conicité interne d'un connecteur de site d'implant du produit de bridge dentaire semi-fini à l'aide d'une machine-outil à CN, puis retrait d'une tige support de positionnement pour obtenir un bridge dentaire multi-trous personnalisé. La fabrication additive ou soustractive d'un bridge dentaire est mise en œuvre au moyen d'une impression 3D métallique et d'une découpe par CN, de sorte que le bridge dentaire réduit efficacement le module élastique de celui-ci tout en satisfaisant aux exigences de résistance, et met également en œuvre l'usinage de haute précision du connecteur de site d'implant du bridge dentaire.
PCT/CN2019/108321 2019-09-27 2019-09-27 Bridge dentaire multi-trous personnalisé basé sur un mode de traitement additif ou soustractif, et procédé de fabrication de celui-ci Ceased WO2021056367A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/108321 WO2021056367A1 (fr) 2019-09-27 2019-09-27 Bridge dentaire multi-trous personnalisé basé sur un mode de traitement additif ou soustractif, et procédé de fabrication de celui-ci

Applications Claiming Priority (1)

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PCT/CN2019/108321 WO2021056367A1 (fr) 2019-09-27 2019-09-27 Bridge dentaire multi-trous personnalisé basé sur un mode de traitement additif ou soustractif, et procédé de fabrication de celui-ci

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113855292A (zh) * 2021-11-12 2021-12-31 鼎植医生集团(深圳)有限公司 一种无牙颌用锆钛复合牙桥的制备方法及结构

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080241798A1 (en) * 2007-03-28 2008-10-02 Institut Straumann Ag Method for manufacturing dental prostheses, method for creating a data record and computer-readable medium
US20130071811A1 (en) * 2011-09-16 2013-03-21 Randall C. Groscurth Edentulous surgical guide
CN103347463A (zh) * 2010-11-10 2013-10-09 贺利氏古莎齿科股份有限公司 牙桥和上部结构及其制造方法
CN104271070A (zh) * 2011-12-01 2015-01-07 贺利氏古萨有限公司 牙桥和上部结构及其制造方法
CN204260854U (zh) * 2014-11-25 2015-04-15 深圳市康泰健牙科器材有限公司 一种数字化个性化基台制作系统
CN106361455A (zh) * 2016-10-13 2017-02-01 成都优材科技有限公司 牙科金属修复体的3d打印成型方法
CN108309477A (zh) * 2018-02-08 2018-07-24 成都优材科技有限公司 个性化牙科种植基台的增减材复合加工成型方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080241798A1 (en) * 2007-03-28 2008-10-02 Institut Straumann Ag Method for manufacturing dental prostheses, method for creating a data record and computer-readable medium
CN103347463A (zh) * 2010-11-10 2013-10-09 贺利氏古莎齿科股份有限公司 牙桥和上部结构及其制造方法
US20130071811A1 (en) * 2011-09-16 2013-03-21 Randall C. Groscurth Edentulous surgical guide
CN104271070A (zh) * 2011-12-01 2015-01-07 贺利氏古萨有限公司 牙桥和上部结构及其制造方法
CN204260854U (zh) * 2014-11-25 2015-04-15 深圳市康泰健牙科器材有限公司 一种数字化个性化基台制作系统
CN106361455A (zh) * 2016-10-13 2017-02-01 成都优材科技有限公司 牙科金属修复体的3d打印成型方法
CN108309477A (zh) * 2018-02-08 2018-07-24 成都优材科技有限公司 个性化牙科种植基台的增减材复合加工成型方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113855292A (zh) * 2021-11-12 2021-12-31 鼎植医生集团(深圳)有限公司 一种无牙颌用锆钛复合牙桥的制备方法及结构

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