WO2021243831A1 - Dispositif de chargement d'essai de fatigue d'implant dentaire - Google Patents

Dispositif de chargement d'essai de fatigue d'implant dentaire Download PDF

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Publication number
WO2021243831A1
WO2021243831A1 PCT/CN2020/104575 CN2020104575W WO2021243831A1 WO 2021243831 A1 WO2021243831 A1 WO 2021243831A1 CN 2020104575 W CN2020104575 W CN 2020104575W WO 2021243831 A1 WO2021243831 A1 WO 2021243831A1
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WO
WIPO (PCT)
Prior art keywords
connecting device
elastic element
loading
dental implant
threaded rod
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Application number
PCT/CN2020/104575
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English (en)
Chinese (zh)
Inventor
张潇
张锦阳
刘志明
陈贤帅
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佛山市安齿生物科技有限公司
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Publication of WO2021243831A1 publication Critical patent/WO2021243831A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0073—Fatigue

Definitions

  • the invention relates to dental implant testing equipment, in particular to a dental implant fatigue test loading device.
  • dental implants have the same feeling as natural teeth after restoration, they also have the advantage of occlusal function close to natural teeth and are beneficial to maintaining the shape of the jaw in the missing area, without damage to adjacent teeth. Therefore, dental implants have become beneficial for dentition defects.
  • the "third tooth" of the author Although the current success rate of dental implant restoration is as high as 90%, the dental implant system is fatigued and damaged, which leads to the fracture of the connecting screw or the crack and fracture of the implant. National standards carry out dynamic fatigue tests on dental implants to detect the maximum stress that does not cause damage to dental implants.
  • the loading cap of the dental implant is set as a curved surface, and the dynamic load is transmitted to the dental implant through point contact between the loading device and the loading cap.
  • the position of the loading cap of the dental implant after being compressed is different
  • the loading device lacks degree of freedom in the horizontal direction, and cannot move with the displacement of the loading cap.
  • the load transmitted to the dental implant during the test cannot be accurately applied to the center point of the loading cap, making the test result exist. error.
  • the present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, the present invention proposes a dental implant fatigue test loading device, which enables the loading device to accurately act on the center point of the loading cap of the dental implant, thereby improving the accuracy of detection.
  • a dental implant fatigue test loading device includes: a first connecting device with a cavity provided inside the first connecting device; a second connecting device; an elastic element, the elastic element being arranged on the In the cavity of the first connecting device, one end of the elastic element is connected with the first connecting device, and the other end of the elastic element is connected with the second connecting device; an adjustment mechanism, the adjustment mechanism is installed in the The first connecting device is used to adjust the position of the elastic element on the first connecting device so that the first connecting device and the second connecting device are in contact with each other and can slide relatively; the loading assembly, the The loading component is connected with the second connecting device.
  • the dental implant fatigue test loading device has at least the following beneficial effects: the present invention adopts a dental implant fatigue test loading device.
  • the elastic element is provided in the present invention. Inside the cavity of the first connection device, one end is connected to the first connection device, and the other end is connected to the second connection device.
  • the adjustment mechanism is installed on the first connection device to adjust the position of the elastic element so that the first connection device It is in contact with the second connecting device and can slide relatively, and the load is transferred when the first connecting device is in contact with the second connecting device.
  • the first connecting device and the second connecting device can also slide relatively so that the second connecting device is in contact with the There is a certain degree of freedom in the horizontal direction; the second connecting device is connected with the loading component, so that the loading component also has a certain degree of freedom in the horizontal direction.
  • the loading component can It moves with the movement of the loading point on the loading cap to ensure that the load is transmitted to the dental implant in the vertical direction through the position of the center point of the loading cap during the test.
  • the first connecting device includes a first threaded rod, a first boss, a second threaded rod, and a second boss.
  • the first boss is disposed between the first threaded rod and the second threaded rod.
  • the second boss is arranged below the second threaded rod, and two key grooves are opened on the side wall of the second threaded rod, and the two key grooves are arranged oppositely and communicate with the inside of the second threaded rod. .
  • the adjustment mechanism includes a nut, a positioning block, and a positioning pin.
  • a through hole is provided in the middle of the positioning block.
  • the nut is arranged under the positioning block, the positioning pin is erected on the positioning block, and the positioning pin crosses the two key grooves, and the positioning pin may be in the two key grooves Sliding, the elastic element is hung on the positioning pin, and the nut is threadedly connected with the second threaded rod.
  • a first groove is provided on the positioning block, and the positioning pin is placed on the first groove.
  • a second groove is provided on the positioning pin, and the elastic element is hung on the second groove.
  • it further includes a load transfer device, a connection groove is provided on the lower surface of the second boss, the load transfer device is installed in the connection groove, and the elastic element passes through the The load transfer device is connected to the second connection device, and the second connection device is slidable relative to the load transfer device.
  • the load transfer device is a thrust ball bearing.
  • the second connecting device includes a connecting part and a connecting rod, the connecting part is installed above the connecting rod, and the connecting rod is provided with an internal threaded hole, the internal threaded hole It is threadedly connected with the loading component, and the connecting portion is connected with the elastic element.
  • the loading assembly includes a third threaded rod and a loading rod, the third threaded rod is disposed above the loading rod, and the third threaded rod is threaded with the internal threaded hole. connect.
  • FIG. 1 is a schematic structural diagram of a loading device for a dental implant fatigue test according to an embodiment of the present invention
  • Figure 2 is a cross-sectional view of the dental implant fatigue test loading device A-A shown in Figure 1;
  • FIG. 3 is a schematic structural diagram of a first connection device according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of the structure of the adjustment mechanism and the elastic element of the embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a second connection device according to an embodiment of the present invention.
  • Fig. 6 is a schematic structural diagram of a loading assembly according to an embodiment of the present invention.
  • the following describes the dental implant fatigue test loading device 1000 according to the present invention with reference to FIGS. 1 to 6.
  • the dental implant fatigue test loading device 1000 includes: a first connecting device 1100, a second connecting device 1200, an elastic element 1300, an adjusting mechanism 1400 and a loading component 1500.
  • a cavity is provided inside the first connecting device 1100, the elastic element 1300 is arranged in the cavity of the first connecting device 1100, and one end of the elastic element 1300 is connected to the first connecting device 1100, and the other end of the elastic element 1300 is connected to the second
  • the device 1200 is connected, and the adjusting mechanism 1400 is installed on the first connecting device to adjust the position of the elastic element 1300 on the first connecting device 1100 so that the first connecting device 1100 and the second connecting device 1200 can be in contact with each other. Relative sliding.
  • the loading component 1500 is connected to the second connecting device 1200.
  • the elastic element 1300 selects a spring, and a first hook is provided on the upper end of the spring, and a second hook is provided on the lower end of the spring.
  • the first hook is connected to the first connecting device 1100
  • the second hook is connected to the second connecting device 1200.
  • the dental implant fatigue test loading device 1000 can be installed on a dynamic fatigue testing machine through the first connection device 1100, and the dynamic fatigue test machine provides a load to the dental implant fatigue test loading device 1000, and the load sequentially passes through the first connection device 1100,
  • the second connecting device 1200 and the loading component 1500 act on the dental implant under the action of the loading component 1500; the loading cap of the dental implant is set as a curved surface, and the contact with the loading component 1500 is point contact, so that the loading component 1500 is in point contact
  • the load is applied to the loading cap of the dental implant in a way; at the same time, because the second connecting device 1200 can drive the loading assembly 1500 to move in the horizontal direction, the loading assembly 1500 also has a certain degree of freedom in the horizontal direction, ensuring the test process In this, the load is transmitted to the dental implant in the vertical direction through the position of the center point of the loading cap.
  • the first connecting device 1100 includes a first threaded rod 1110, a first boss 1120, a second threaded rod 1130, and a second boss 1140, and the first boss 1120 is disposed on the first thread. Between the rod 1110 and the second threaded rod 1130, the second boss 1140 is arranged under the second threaded rod 1130.
  • the side wall of the second threaded rod 1130 is provided with two key grooves 1131, and the two key grooves 1131 are arranged oppositely and communicate with the second threaded rod 1130. Inside the two threaded rod 1130.
  • the first boss 1120 is disposed between the first threaded rod 1110 and the second threaded rod 1130
  • the second boss 1140 is disposed below the second threaded rod 1130
  • the second threaded rod Two key grooves 1131 are opened on the side wall of 1130, and the two key grooves 1131 are arranged oppositely and communicate with the inside of the second threaded rod 1130.
  • the threads on the first threaded rod 1110 are configured as fine threads, and the first boss 1120 is configured as a tetragonal anti-rotation structure; the first threaded rod 1110 is fixedly installed above the first boss 1120 through the first threaded rod 1110
  • the first connecting device 1100 can be fixedly connected to the dynamic fatigue testing machine, and at the same time, the first connecting device 1100 can be more stably locked to the dynamic fatigue testing machine by setting the first boss 1120.
  • the thread on the second threaded rod 1130 is a coarse thread, and a cavity is provided in the coarse threaded rod.
  • the adjustment mechanism 1400 includes a nut 1430, a positioning block 1410, and a positioning pin 1420.
  • a through hole is provided in the middle of the positioning block 1410, so that the positioning block 1410 is arranged on the outside of the second threaded rod 1130 through the through hole.
  • the nut 1430 is arranged under the positioning block 1410, the positioning pin 1420 is erected on the positioning block 1410, and the positioning pin 1420 crosses the two key grooves 1131, the positioning pin 1420 can slide in the two key grooves 1131, and the elastic element 1300 is hung on the positioning block.
  • a nut 1430 is threadedly connected with the second threaded rod 1130.
  • the positioning pin 1420 is erected on the positioning block 1410, and the positioning pin 1420 crosses the two key grooves 1131, the positioning pin 1420 can slide in the two key grooves 1131, and the nut 1430 is arranged on the positioning block Below 1410, a through hole is provided in the middle of the positioning block 1410, the positioning block 1410 is arranged on the outside of the second threaded rod 1130 through the through hole, and the nut 1430 is threadedly connected with the second threaded rod 1130.
  • a hexagonal anti-rotation surface is provided on the outside of the nut 1430, which is fixedly connected to the positioning block 1410, so that the threaded connection between the nut 1430 and the second threaded rod 1130 is firmer, and the positioning block 1410 is also arranged on the first Connect to the device 1100.
  • Two key grooves 1131 are opened at the center of the upper part of the second threaded rod 1130.
  • the two key grooves 1131 are arranged oppositely and communicate with the inside of the second threaded rod 1130, so that the positioning pin 1420 can be erected in the two key grooves 1131, and the positioning pin 1420 is in the same position.
  • Sliding up and down in the two key grooves 1131 can also drive the elastic element 1300 to stretch, adjust the tension between the first connection device 1100 and the second connection device 1200, so that the first connection device 1100 and the second connection device 1200 are in contact with each other and can be opposed to each other. slide.
  • the positioning block 1410 is provided with a first groove 1411, and the positioning pin 1420 is hung on the first groove 1411.
  • the positioning block 1410 is provided with a first groove 1411, and the positioning pin 1420 is hung on the positioning block 1410 through the first groove 1411.
  • a first groove 1411 is provided above the positioning block 1410 and passing through the center of the through hole of the positioning block 1410.
  • the positioning pin 1420 can also drive the elastic element 1300 to move to adjust the position of the elastic element 1300 on the first connecting device 1100 ,
  • the first connecting device 1100 and the second connecting device 1200 are brought into contact with each other, and the first connecting device 1100 and the second connecting device 1200 can slide relatively on a horizontal surface.
  • the positioning pin 1420 is provided with a second groove 1421, and the elastic element 1300 is hung on the second groove 1421.
  • the positioning pin 1420 is provided with a second groove 1421, and the elastic element 1300 is fixedly hung on the positioning pin 1420 through the second groove 1421.
  • the first connecting device 1100 is provided with a cavity inside, and the positioning pin 1420 is located at the center of the cavity of the first connecting device 1100, and a second groove 1421 is provided so that the spring can be hung on the positioning pin 1420 and facing the spring The location is limited.
  • the dental implant fatigue test loading device 1000 further includes a load transfer device 1600, the lower surface of the second boss 1140 is provided with a connecting groove 1141, and the load transfer device 1600 is installed in the connecting groove 1141,
  • the elastic element 1300 passes through the load transfer device 1600 and is connected to the second connection device 1200, and the second connection device 1200 can slide relative to the load transfer device 1600.
  • the lower surface of the second boss 1140 is provided with a connecting groove 1141
  • the load transmitting device 1600 is installed in the connecting groove 1141
  • the elastic element 1300 passes through the load transmitting device 1600 and the second connecting device. 1200 connections.
  • the load transfer device 1600 is installed in the connecting groove 1141 below the second boss 1140 by inlay, so that the load transfer device 1600 is connected to the first connection device 1100, and the lower surface of the load transfer device 1600 is connected to the second connection
  • the devices 1200 are in contact with each other and can slide relatively, so that the second connecting device 1200 has a certain degree of freedom on the horizontal plane.
  • the plane of the load transfer device 1600 contacting the second connection device 1200 is smaller than the plane of the second connection device 1200 contacting the load transfer device 1600, which can ensure the smooth transmission of the load in the vertical direction without restricting the second connection device 1200 on the horizontal plane. Degrees of freedom.
  • the load transfer device 1600 is a thrust ball bearing.
  • thrust ball bearings can transmit axial loads but cannot bear radial loads.
  • Thrust ball bearings can be detachable devices, including upper surface washers, lower surface washers, cages and balls. Both the upper plane washer and the lower plane washer are provided with semicircular grooves, the cage is placed in the semicircular groove, and the balls are installed on the cage.
  • the lower surface gasket and the second connecting device 1200 are in contact with each other and can slide relatively, so that the second connecting device 1200 has a certain degree of freedom in the horizontal direction.
  • the second connecting device 1200 includes a connecting portion 1210 and a connecting rod 1220.
  • the connecting portion 1210 is installed above the connecting rod 1220.
  • the connecting rod 1220 is provided with an internal threaded hole, the internal threaded hole and the loading component 1500 screw connection, the connecting portion 1210 is connected with the elastic element 1300.
  • the connecting portion 1210 is connected to the bottom of the elastic element 1300, and the connecting portion 1210 is installed above the connecting rod 1220.
  • the connecting portion 1210 is configured as a third hook
  • the elastic element 1300 is a spring
  • the bottom of the spring is provided with a second hook
  • the third hook and the second hook are connected, so that the spring and the second connecting portion 1210 are connected.
  • the connecting rod 1220 is set in a T-shaped structure, and the outer side of the connecting rod 1220 is provided with an anti-rotation surface, and the connecting rod 1220 is provided with an internal threaded hole.
  • the anti-rotation surface is provided to make the connection between the two stronger, and the internal threaded hole
  • the connecting rod 1220 is threadedly connected with the loading assembly 1500.
  • the loading assembly 1500 includes a third threaded rod 1510 and a loading rod 1520, the third threaded rod 1510 is disposed above the loading rod 1520, and the third threaded rod 1510 is threadedly connected with the internal threaded hole.
  • the loading rod 1520 is disposed below the third threaded rod 1510, and the third threaded rod 1510 is threadedly connected to the connecting rod 1220 through an internal threaded hole.
  • the connecting rod 1220 is threadedly connected with the third threaded rod 1510, and the loading assembly 1500 is fixedly installed on the second connecting device 1200, so that the second connecting device 1200 can drive the loading
  • the component 1500 moves; the loading rod 1520 is set in a T-shaped structure.
  • the loading component 1500 receives the load and transmits it downward, and applies the load to the dental implant through the loading rod 1520.
  • the loading cap of the dental implant is set as a curved surface, and the load is applied between the loading rod 1520 and the loading cap by means of point contact.
  • the second connecting device 1200 can drive the loading assembly 1500 to adjust the position of the load acting on the loading cap, so that the loading assembly 1500 has a certain degree of freedom in the horizontal direction, ensuring that the loading assembly 1500 has a certain degree of freedom in the horizontal direction, ensuring that during the test , The load is transmitted to the dental implant in the vertical direction through the position of the center point of the loading cap.
  • FIGS. 1 to 6 a specific embodiment is used to describe in detail a dental implant fatigue test loading device 1000 according to an embodiment of the present invention. It should be understood that the following description is only an example description, rather than a specific limitation to the invention.
  • the dental implant fatigue test loading device 1000 includes a first connecting device 1100, a second connecting device 1200, an elastic element 1300, an adjustment mechanism 1400 and a loading component 1500.
  • the elastic element 1300 is selected from springs and springs.
  • a first hook is provided at the upper end, and a second hook is provided at the lower end of the spring; a cavity is provided in the first connecting device 1100, the spring is provided in the cavity of the first connecting device 1100, and the first hook is connected to the first hook through the adjusting mechanism 1400
  • a connecting device 1100 is connected, the second hook is connected to the second connecting device 1200, and the loading assembly 1500 is connected to the second connecting device 1200.
  • the first connecting device 1100 and the second connecting device 1200 are brought into contact with each other and can slide relatively.
  • the adjustment mechanism 1400 includes a nut 1430, a positioning block 1410, and a positioning pin 1420.
  • the positioning block 1410 is provided with a through hole in the center, and the positioning block 1410 is provided with a first groove 1411 at a position passing through the center of the through hole.
  • Below the positioning block 1410 the positioning pin 1420 is placed on the first groove 1411 of the positioning block 1410; the positioning pin 1420 passes through the center of the cavity of the first connecting device 1100 is provided with a second groove 1421, and the first hook is hung on On the second groove 1421.
  • the spring is hung on the adjusting mechanism 1400 to connect the spring to the first connecting device 1100.
  • the second threaded rod 1130 of the second connecting device 1200 is provided with two key grooves 1131.
  • the two key grooves 1131 are arranged oppositely and communicate with the inside of the second threaded rod 1130.
  • the positioning pin 1420 crosses the two key grooves 1131, and the positioning pin 1420 is in the nut 1430. Driven by the positioning block 1310, it slides in the two key grooves 1131 to adjust the position of the spring so that the first connection device 1100 and the second connection village 1200 are in contact with each other and can slide relatively.
  • a load transfer device 1600 is also provided, and the load transfer device 1600 is a thrust ball bearing; by providing a connecting groove 1141 under the second boss 1140 of the first connecting device 1100, the thrust ball bearing is embedded in the connecting groove 1141 The spring passes through the thrust ball bearing and is connected to the connecting portion 1210 of the second connecting device 1200, the T-shaped connecting rod 1220 in the second connecting device 1200 is in contact with the lower plane washer of the thrust ball bearing, and the second connecting device 1200 and The thrust ball bearing keeps relative sliding on the horizontal plane, even if the second connecting device 1200 has a degree of freedom on the horizontal plane.
  • the plane of the lower plane gasket contacting the second connecting device 1200 is smaller than the plane of the second connecting device 1200 touching the lower plane washer, which can ensure the smooth transmission of the load in the vertical direction while not restricting the second connecting device 1200 in the horizontal direction. Degrees of freedom.
  • the second connecting device 1200 is threadedly connected with the loading assembly 1500, so the second connecting device 1200 can drive the loading assembly 1500 to move, so that the loading assembly 1500 also has a degree of freedom in the horizontal direction.
  • the first connecting device 1100 and the second connecting device 1200 are connected by setting the elastic element 1300, and the adjusting mechanism 1400 adjusts the elastic element
  • the position of 1300 enables the first connecting device 1100 and the second connecting device 1200 to be in contact with each other and slidable relative to each other; a through hole is provided in the center of the load transfer device 1600, and the load transfer device 1600 is embedded at the bottom of the first connecting device 1100, so The load transfer device 1600 and the second connection device 1200 can contact each other and slide relative to each other in the horizontal direction under the action of the elastic element 1300.
  • the load transfer device 1600 In the plane where the load transfer device 1600 and the second connection device 1200 are in contact, the load transfer device 1600 The plane is smaller than the plane of the second connecting device 1200.
  • the load can be transferred in the axial direction by the load transfer device 1600 and the second connecting device 1200 contacting; the relative sliding of the load transfer device 1600 and the second connecting device 1200 can make the second
  • the connecting device 1200 has a certain degree of freedom in the horizontal direction.
  • the second connecting device 1200 is threadedly connected with the loading assembly 1500.
  • the second connecting device 1200 can drive the loading assembly 1500 to move in the horizontal direction, so that the loading assembly 1500 also has a certain degree of freedom in the horizontal direction.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

L'invention concerne un dispositif de chargement d'essai de fatigue d'implant dentaire (1000), comprenant un premier dispositif de liaison (1100), un second dispositif de liaison (1200), un élément élastique (1300), un mécanisme de réglage (1400) et un ensemble de chargement (1500). Une cavité est ménagée dans le premier dispositif de liaison (1100). L'élément élastique (1300) est agencé dans la cavité du premier dispositif de liaison (1100), une extrémité de l'élément élastique (1300) est reliée au premier dispositif de liaison (1100), et l'autre extrémité de l'élément élastique (1300) est reliée au second dispositif de liaison (1200). Le mécanisme de réglage (1400) est installé sur le premier dispositif de liaison (1100) et règle la position de l'élément élastique (1300), de telle sorte que le premier dispositif de liaison (1100) et le second dispositif de liaison (1200) soient en contact l'un avec l'autre et puissent coulisser l'un par rapport à l'autre. L'ensemble de chargement (1500) est relié au second dispositif de liaison (1200). Le second dispositif de liaison (1200) possède un certain degré de liberté dans une direction horizontale et peut entraîner l'ensemble de chargement (1500) en déplacement dans la direction horizontale, de telle sorte qu'il est garanti qu'une charge soit transmise à un implant dentaire dans une direction verticale par le biais d'un point central d'un embout de chargement.
PCT/CN2020/104575 2020-06-05 2020-07-24 Dispositif de chargement d'essai de fatigue d'implant dentaire WO2021243831A1 (fr)

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CN202010506465.X 2020-06-05
CN202010506465.XA CN111721610A (zh) 2020-06-05 2020-06-05 牙种植体疲劳测试加载装置

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WO2021243831A1 true WO2021243831A1 (fr) 2021-12-09

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CN111721610A (zh) * 2020-06-05 2020-09-29 佛山市安齿生物科技有限公司 牙种植体疲劳测试加载装置
CN114484182A (zh) * 2022-02-15 2022-05-13 上海锐淅医学科技有限公司 一种植入物疲劳测试设备支架及测试设备
CN114563264A (zh) * 2022-02-24 2022-05-31 天津大学 一种改进型牙种植体疲劳测试夹具
CN114989955A (zh) * 2022-05-30 2022-09-02 四川轻化工大学 一种种植体微生物实时腐蚀动态测试系统
CN115290481A (zh) * 2022-08-05 2022-11-04 西南交通大学 一种牙种植体螺纹腐蚀疲劳试验装置及其试验方法

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