CN104325364B - The external oral cavity high speed of ultrasonic wave added grinds reparation analog - Google Patents

Abstract

The invention discloses an ultrasound-assisted high-speed grinding and restoration simulation device for extracorporeal oral cavity. The two systems are respectively equipped with transducer A (3-5) and transducer B (4-5); the ultrasonic power supply vibrates the workpiece along the vertical line and the horizontal direction through the two transducers, and the linear vibration in the two directions Synthetic elliptical vibration; the present invention conducts two-dimensional ultrasonic-assisted grinding and repair tests on various dental materials through the two-dimensional elliptical ultrasonic vibration of the workpiece, and observes the changes in force, heat, noise, surface morphology and subsurface damage To study the improvement effect of ultrasonic-assisted oral grinding; the simulation device is simple, compact and easy to operate.

Description

Ultrasound-assisted high-speed grinding and repairing simulation device for extracorporeal oral cavity

technical field

The invention relates to an in vitro simulation experiment device for grinding and repairing oral cavity materials, in particular to a simulation platform for high-speed grinding and repairing of oral cavity in vitro assisted by two-dimensional ultrasound.

Background technique

In the field of prosthodontics, oral high-speed grinding is an essential key technology, which is widely used in the tooth tissue preparation before the restoration is in place and the surface grinding operation after the restoration is in place, that is, the doctor uses high-speed Dental handpieces and abrasive carts perform a large number of grinding, polishing and other operations on the shape of tooth tissue or restorations to adjust the occlusal and coordination relationship between the restoration and the dento-jaw system, which is the guarantee for the restoration to achieve normal oral victory key link. Difficulties include: the complexity of the oral environment, the difficulty in removing restorations, the extremely prone to grinding repair damage, which leads to early micro-damage and sudden macro-destruction of the restoration, and the impact of dynamic cutting force, vibration and noise on patients. of discomfort.

In order to solve the above problems, S.C.Siegel and J.V.vonFraunnhoferA of the University of Maryland et al. designed a simple and easy simulated oral restoration cutting device [S.C.Siegel, J.V.vonFraunhofer. Effects of handpiece load on the cutting efficiency of dental burs, Machining Science & Technology 1 (1) (1997)) 1-13] Dental handpieces and diamond abrasives are used for in vitro simulated grinding and restoration of dental materials, and relevant research is conducted on the material removal rate. Dr. B. Lawn, academician of the American Academy of Engineering and NIST, has conducted a lot of research on the brittle fracture and quasi-plastic failure of dental ceramics by using the indentation test method [I.M. , Journal of Dental Research 77(4)(1998) 589-602]. X.Dong, L.Yin, S.Jahanmir, and L.K.Ives of the National Bureau of Standards cooperated with D.E.Rekow of the New Jersey Medical University to develop a quasi-static and constant grinding force dental from the perspective of materials science and tribology Ceramic oral restorative experimental device, and based on this, the influence of the microstructure of various dental ceramic materials and the particle size of diamond abrasives on the surface quality of grinding repairs and the wear of diamond abrasives was discussed [L.Yin, S. Jahanmir, L.K. Ives. , Wear 255 (2003) 975-989. ]The applicant's research team has cooperated with Tianjin Medical University since 2005 to break through the one-dimensional quasi-static limitations of existing foreign research devices, and successively designed two-dimensional and three-dimensional dental grinding physical simulation in vitro simulation devices [YinL, SongXF, QuSF, HuangT ,MeiJP,YangZY,LiJ,Performanceevaluationofadentalhandpieceinsimulationofclinicalfinishingusingnovel2-DOFinvitroapparatus,ProceedingoftheInstitutionofMechanicalEngineersPartH:JournalofEngineeringinMedicine,2006,220(8):929-938]. Grinding thermal damage [SongXF, YinL, Surface morphology and fracture in handpiece adjusting of leucite-reinforced glass ceramic with coarse diamond burs, Materials Science & Engineering A, 2012, 534(1): 193-202]. In conventional oral grinding operations, due to the high speed of the high-speed dental handpiece, the force, heat, and noise generated in clinical grinding operations make patients feel uncomfortable, and the surface damage of the restoration after grinding is relatively serious. The comfort of the operation and the quality of the prosthesis urgently require new methods and means to improve conventional oral grinding.

In view of the unique advantages of ultrasonic vibration technology in the field of industrial processing, if an ultrasonic vibration system is added to the conventional oral high-speed grinding technology, it will greatly improve the effect and efficiency of oral grinding. Therefore, it is very necessary to design a device that can use dental handpieces to perform ultrasonic grinding repairs in vitro.

Contents of the invention

The object of the present invention is to provide a simulation experiment device for ultrasonic-assisted rapid oral cavity adjustment and repair in order to overcome the shortcomings of low repair quality and comfort in conventional oral grinding.

The present invention is realized through the following technical solutions.

An ultrasonic-assisted oral high-speed grinding and repairing simulation device in vitro, including an adjustable frame and a simulated repair system, characterized in that the adjustable frame is composed of a square lower bottom plate 1, an upper top plate 8, a column 12, and a nut 15 , the symmetrical positions of the four corners of the lower bottom plate 1 are respectively provided with threaded holes, and the corresponding positions of the four corners of the upper top plate 8 and the lower bottom plate 1 are respectively provided with through holes; The top plate 8 forms a height-adjustable rack;

A square groove is arranged in the center of the lower bottom plate 1, and a small bottom plate 2 is arranged in the groove, and a dynamometer 14, a positioning plate 13, an axial ultrasonic vibration system 3 and a transverse ultrasonic vibrating system are sequentially arranged on the small bottom plate 2. Vibration system 4; the axial ultrasonic vibration system 3 includes an axial support frame 3-1, and the upper surface of the axial support frame 3-1 is provided with a horn A3-4, and the horn A3-4 is passed through a large nut A3- 2 is fixed with the axial connecting rod 3-3, and the axial connecting rod 3-3 is connected with the workpiece fixture 5; the upper surface of the axial support frame 3-1 is also provided with a liquid receiving plate 11; the transverse ultrasonic vibration The system 4 includes a transverse support frame 4-1, and a horn B4-2 is arranged on the top of the transverse support frame 4-1, and the horn B4-2 is fixed to the transverse connecting rod 4-4 through a large nut B4-3. The connecting rod 4-4 is also connected with the workpiece fixture 5; one end of the horn A3-4 with a flange is provided with a transducer A3-5, and the end of the horn B (4-2) with a flange is provided with a transducer Transducer B4-5, connect the external ultrasonic power supply to the two transducers to make the two horns generate ultrasonic vibrations;

The workpiece fixture 5 is provided with a base 5-1, and the base 5-1 is respectively provided with a threaded hole in the horizontal and vertical directions and is connected with the axial connecting rod 3-3 and the transverse connecting rod 4-3; the base 5 -1 is provided with a vertical plate 5-3 in the middle position, and a circular hole is arranged on the vertical plate 5-3, and the cylindrical end of the workpiece 5-2 passes through the circular hole and is connected with the vertical plate 5-3, and is fixed with a nut. And coincide with the groove on the workpiece by the protrusion on the vertical plate 5-3 to prevent rotation.

A two-dimensional motion system 9 is arranged below the upper top plate 8, wherein the upper top plate 8 is rigidly connected to the linear slide table A9-1, and the linear slide table A9-1 is provided with a slide block A9-2, and the slide block A9-2 is connected to the linear slide table A9-1. The slide table B9-4 is rigidly connected, the linear slide table B9-4 is provided with a slide block B9-5, the slide block B9-5 is connected with the height adjuster 7 through the bolt below it, and the lower end of the adjuster 7 is provided with a mobile phone fixture 6. The handpiece fixture 6 is connected to the dental handpiece 10, and the dental handpiece 10 is connected to the external high-speed turbo dental drill; the two linear slides are respectively driven by the servo motor A9-3 and the servo motor B9-6, so that the dental handpiece 10 is in the horizontal plane. two-dimensional motion.

The axial ultrasonic vibration system 3 makes the workpiece vibrate along the vertical direction, the transverse ultrasonic vibration system 4 makes the workpiece vibrate in the horizontal direction, and the linear vibrations in the two directions are synthesized into elliptical vibrations.

Described height adjuster 7 is made up of connecting rod 7-1 and adjusting frame 7-2, and both are fixed with nut after being adjusted to required position by screw thread.

The dynamometer 14 converts the force signal into an electrical signal, and then collects and analyzes the relevant grinding signal through the charge amplifier and the data acquisition system, so as to realize online measurement and monitoring of the grinding repair force during the grinding process.

The experimental device of the present invention can be used for ultrasonic-assisted vibration grinding of oral materials, by comparing the two-dimensional elliptical vibration applied to the workpiece with that without vibration, and observing the changes in force, heat, noise, surface morphology and subsurface damage. To study the improvement effect of ultrasonic assisted oral grinding, the simulation device is simple in structure, compact and easy to operate.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the ultrasound-assisted external oral cavity high-speed grinding repair simulation device of the present invention;

Fig. 2 is a schematic diagram of the axial ultrasonic vibration system of the ultrasound-assisted high-speed grinding and repair simulation device for extracorporeal oral cavity of the present invention;

Fig. 3 is a schematic diagram of the transverse ultrasonic vibration system of the ultrasonic-assisted high-speed oral grinding restoration simulation device in the present invention;

Fig. 4 is a schematic diagram of the workpiece fixture of the ultrasound-assisted in vitro high-speed oral grinding repair simulation device of the present invention;

Fig. 5 is a two-dimensional schematic diagram of the height regulator of the ultrasound-assisted high-speed grinding and restoration simulation device for extracorporeal oral cavity of the present invention;

Fig. 6 is a schematic diagram of the two-dimensional motion system of the ultrasound-assisted high-speed grinding and restoration simulation device for extracorporeal oral cavity of the present invention.

Reference signs:

1——lower bottom plate 2——small bottom plate

3——Axial Ultrasonic Vibration System 3-1——Axial Support Frame

3-2——Big Nut A3-3——Axial Connecting Rod

3-4——horn A3-5——transducer A

4——Lateral Ultrasonic Vibration System 4-1——Lateral Support Frame

4-2——horn B4-3——big nut B

4-4——transverse connecting rod 4-5——transducer B

5——workpiece fixture 5-1——base

5-2——workpiece 5-3——upright plate

6——mobile phone fixture 7——height adjuster

7-1——Adjustment column 7-2——Adjustment frame

8——upper top plate 9——two-dimensional motion system

9-1——Linear slide A9-2——Slider A

9-3——servo motor A9-4——linear sliding table B

9-5——slider B9-6——servo motor B

10——Dental handpiece 11——Liquid tray

12——Column 13——Positioning plate

14——force gauge 15——nut

detailed description

The invention adopts conventional materials and conventional production techniques for preparation.

The present invention will be further described below in conjunction with the accompanying drawings.

Referring to Fig. 1 , the ultrasonic-assisted high-speed oral grinding and restoration simulation device for extracorporeal oral cavity of the present invention consists of an adjustable frame and a simulation restoration system.

The adjustable frame is composed of a square lower bottom plate 1, an upper top plate 8, upright columns 12, and nuts 15. The four corners of the lower bottom plate 1 are respectively provided with threaded holes, and the corresponding positions of the upper top plate 8 and the four corners of the lower bottom plate 1 are respectively provided with through holes. hole; the lower base plate 1 forms a height-adjustable frame with the upper base plate 8 through four threaded columns 12 and nuts 15;

A square groove is arranged in the center of the lower bottom plate 1, and a small bottom plate 2 is arranged in the groove, and a dynamometer 14, a positioning plate 13, an axial ultrasonic vibration system 3 and a transverse ultrasonic vibrating system are sequentially arranged on the small bottom plate 2. Vibration system 4; as shown in Figure 2, the axial ultrasonic vibration system 3 includes an axial support frame 3-1, and the upper side of the axial support frame 3-1 is provided with a horn A3-4, and the horn A3- 4 The axial connecting rod 3-3 is fixed through the large nut A3-2, and the axial connecting rod 3-3 is connected with the workpiece fixture 5; the upper surface of the axial supporting frame 3-1 is also provided with a liquid receiving plate 11 , used to receive the coolant sprayed out during the grinding process, and the gap between the liquid receiving plate 11 and the horn A3-4 is sealed with a sealing ring to prevent water leakage. As shown in Figure 3, the transverse ultrasonic vibration system 4 includes a transverse support frame 4-1, and a horn B4-2 is arranged above the transverse support frame 4-1, and the horn B4-2 passes through a large nut B4-3 It is fixed with the transverse connecting rod 4-4, and the transverse connecting rod 4-4 is also connected with the workpiece fixture 5;

The flanged ends of the horn A3-4 and the horn B4-2 are respectively equipped with a transducer A3-5 and a transducer B4-5. After connecting the ultrasonic power supply to the two transducers, the two transformers The rod generates ultrasonic vibration; the axial ultrasonic vibration system 3 makes the workpiece vibrate along the vertical direction, the transverse ultrasonic vibration system 4 makes the workpiece vibrate in the horizontal plane, and the linear vibration in two directions is synthesized into elliptical vibration.

As shown in Figure 4, the workpiece fixture 5 is provided with a base 5-1, and the base 5-1 is respectively provided with a threaded hole in the horizontal and vertical directions and is connected with the axial connecting rod 3-3 and the transverse connecting rod 4-3. connected; the middle position of the base 5-1 is provided with a vertical plate 5-3, and a circular hole is arranged on the vertical plate 5-3, and the threaded cylindrical end of the workpiece 5-2 passes through the circular hole and the vertical plate 5- 3 are connected, fixed with nuts, and coincide with the grooves on the workpiece by the protrusion on the vertical plate 5-3 to prevent rotation.

A two-dimensional motion system 9 is arranged below the upper top plate 8, which includes a linear slide A9-1 rigidly connected to the upper top plate 8, and a slide block A9-2 on the linear slide A9-1 is rigidly connected to the linear slide B9-4 , the sliding block B9-5 on the linear slide table B9-4 is connected with the height regulator 7 through the bolt below, the lower end of the regulator 7 is provided with a mobile phone clamp 6, and the mobile phone clamp 6 is connected with the dental handpiece 10; The stage is respectively driven by the servo motor A9-3 and the servo motor B9-6, so that the dental handpiece 10 moves on the horizontal plane;

As shown in Figure 5, the height adjuster 7 is made up of an adjustment column 7-1 and an adjustment frame 7-2, and the height is adjusted by screwing the thread on the adjustment column 7-1 to the threaded hole on the adjustment frame 7-2. After reaching the desired position, fix it with nuts.

The dental handpiece 10 is driven by a high-speed turbine dental drill, and there are two small holes at the tail of the dental handpiece 10: the air inlet hole and the water inlet hole; during the grinding process, the dental drill machine rotates at high speed through the air inlet hole of the dental handpiece and the pneumatic dental bur , and at the same time, the coolant is continuously sprayed out through the water inlet hole of the dental handpiece.

The dynamometer 14 is connected with the positioning plate 13. During the grinding process, the dynamometer converts the force signal into an electrical signal, collects and analyzes the relevant grinding signals through the charge amplifier and the data acquisition system, and realizes the grinding process. On-line measurement and monitoring of grinding repair force during the process.

Ultrasonic-assisted external oral cavity high-speed grinding and repairing simulation device realizes the two-dimensional controllable movement of the dental handpiece, the two-dimensional elliptical ultrasonic vibration of the workpiece, and conducts two-dimensional ultrasonic-assisted grinding and repairing tests on various dental materials. Grinding forces are measured and monitored at any time.

Claims (4)

1. An ultrasound-assisted oral high-speed grinding and repairing simulation device in vitro, comprising an adjustable frame and a simulated repair system, characterized in that the adjustable frame consists of a square lower bottom plate (1), an upper top plate (8) and Composed of uprights (12) and nuts (15), the four corners of the lower base plate (1) are respectively provided with threaded holes, and the corresponding positions of the four corners of the upper top plate (8) and the lower base plate (1) are respectively provided with through holes; the lower base plate ( 1) A height-adjustable frame is composed of four threaded columns (12) and four nuts (15) and the upper top plate (8); A square groove is arranged at the central position of the lower bottom plate (1), and a small bottom plate (2) is arranged in the groove, and a dynamometer (14) and a positioning plate (13) are sequentially arranged on the small bottom plate (2). , Axial ultrasonic vibration system (3) and transverse ultrasonic vibration system (4); Described axial ultrasonic vibration system (3) comprises axial support frame (3-1), the top of axial support frame (3-1) The horn A (3-4) is provided, and the horn A (3-4) is fixed with the axial connecting rod (3-3) through the large nut A (3-2), and the axial connecting rod (3- 3) It is connected with the workpiece fixture (5); the liquid receiving plate (11) is also arranged above the axial support frame (3-1); the transverse ultrasonic vibration system (4) includes a transverse support frame (4- 1), the top of the transverse support frame (4-1) is provided with a horn B (4-2), and the horn B (4-2) is connected with the transverse connecting rod (4- 4) The phase is fixed, and the transverse connecting rod (4-4) is also connected with the workpiece fixture (5); the end of the horn A (3-4) with the flange is provided with a transducer A (3-5), and the The flanged end of the horn B (4-2) is provided with a transducer B (4-5), and the external ultrasonic power supply is connected to the two transducers to make the two horns generate ultrasonic vibrations; The workpiece fixture (5) is provided with a base (5-1), and the base (5-1) is respectively provided with a threaded hole in the horizontal and vertical direction and connected with the axial connecting rod (3-3) and the transverse connecting rod (4-3) are connected; the middle position of the base (5-1) is provided with a vertical plate (5-3), and a circular hole is arranged on the vertical plate (5-3), and the cylindrical end of the workpiece (5-2) Connect with the vertical plate (5-3) through the round hole, fix it with a nut, and match the protrusion on the vertical plate (5-3) with the groove on the workpiece to prevent rotation; A two-dimensional motion system (9) is provided under the upper top plate (8), wherein the upper top plate (8) is rigidly connected to the linear slide table A (9-1), and the linear slide table A (9-1) is provided with a slide block A (9-2), the slider A (9-2) is rigidly connected with the linear slide table B (9-4), and the linear slide table B (9-4) is provided with a slide block B (9-5), The slide block B (9-5) is connected with the height adjuster (7) by the bolt below it, and the lower end of the adjuster (7) is provided with a mobile phone clamp (6), and the mobile phone clamp (6) is connected with the dental handpiece (10). connection, the dental handpiece (10) is connected with the external high-speed turbine dental drill; the two linear slides are respectively driven by the servo motor A (9-3) and the servo motor B (9-6), so that the dental handpiece (10) is in the horizontal plane two-dimensional motion. 2. The ultrasound-assisted external oral cavity high-speed grinding and restoration simulation device according to claim 1, characterized in that, the axial ultrasonic vibration system (3) makes the workpiece vibrate along the vertical direction, and the transverse ultrasonic vibration system (4) Make the workpiece vibrate in the direction of the horizontal plane, and the linear vibrations in the two directions are synthesized into elliptical vibrations. 3. The ultrasound-assisted high-speed grinding and restoration simulation device for extracorporeal oral cavity according to claim 1, characterized in that, the height adjuster (7) is composed of a connecting rod (7-1) and an adjusting frame (7-2), The two are adjusted to the desired position by threads and then fixed with nuts. 4. The ultrasound-assisted external oral cavity high-speed grinding and repairing simulation device according to claim 1, characterized in that, the force signal is converted into an electrical signal by the force measuring instrument (14), and then through a charge amplifier and a data acquisition system, the The relevant grinding signals are collected and analyzed to realize the online measurement and monitoring of the grinding repair force during the grinding process.