Orthodontic appliance friction force measuring device and use method

Abstract

The invention relates to the technical field of tooth orthodontics, in particular to an orthodontic appliance friction force measuring device and a use method. The surface of the test base is provided with a plurality of tooth model modules which are arranged in an arc-shaped track and are uniformly distributed, one side of each tooth model module is provided with a bracket, the inner side of each bracket is provided with a miniature strain gauge, the inner side of each bracket is provided with an arch wire in a penetrating manner, one end of each arch wire is fixedly connected with a fixed dynamometer, and the outer side of each fixed dynamometer is fixedly connected with the test base. The other end of the arch wire is fixedly connected with a force measuring module; arch wires are installed in a bracket on the outer sides of a plurality of simulated teeth, the arch wires are pulled through a force measurement module, the friction force between the arch wires and the bracket is measured, and when the force measurement module pulls the arch wires, a fixed dynamometer just displays a numerical value which indicates that the friction force measured by the force measurement module is the total value of the friction force between the arch wires and the bracket. The device is used for facilitating subsequent installation and adjustment of the appliance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of orthodontic treatment, in particular to a device for measuring friction of an orthodontic appliance and a method of use. BACKGROUND

[0002] In orthodontic treatment, friction is a key physical factor affecting the efficiency of tooth movement, treatment time and treatment effect. It refers to the resistance to relative movement when orthodontic devices (such as brackets, arch wires, and accessories) are in contact with teeth / soft tissue. Understanding its mechanism, influencing factors and control methods is crucial for optimizing treatment plans.

[0003] In the process of orthodontic treatment, orthodontic force needs to overcome friction to act on the teeth to achieve orthodontic work. When the friction is too large, most of the orthodontic force is offset by friction, and the "effective force" actually acting on the teeth is insufficient, the tooth movement speed slows down, and the treatment time is prolonged. If the friction is greater than the force required for tooth movement, the tooth may have a "crown tilt" and an increased risk of root absorption (as the tooth cannot move as a whole, the root is under concentrated stress). Therefore, it is important to accurately know the size of the friction in the orthodontic treatment process to facilitate the doctor to set the appliance accordingly and help the orthodontic work. Therefore, a device for measuring friction of an orthodontic appliance and a method of use are proposed to solve the above problems. SUMMARY

[0004] The present application aims to provide a device for measuring friction of an orthodontic appliance and a method of use to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions: As an optional solution of the device for measuring friction of an orthodontic appliance and the method of use, the device for measuring friction of an orthodontic appliance and the method of use comprise a test base; A plurality of dental model modules are uniformly distributed on the surface of the test base in an arc trajectory. Each dental model module is installed with a bracket on one side. A micro strain gauge is installed on the inner side of each bracket. An arch wire is also inserted into the inner side of each bracket. A fixed force gauge is fixedly connected to one end of the arch wire. The outer side of the fixed force gauge is fixedly connected to the test base. A force measuring module is fixedly connected to the other end of the arch wire. A bite simulation module is embedded in the center of the test base. Sliding tables are slidingly connected to both sides of the bite simulation module. A bite plate is fixedly connected to the other end of each sliding table. A guide frame is also slidingly connected to the outer side of the bite simulation module. A hydraulic push rod is fixedly connected to the other end of the guide frame. The free end of the hydraulic push rod is fixedly connected to the bite plate. An iron plate is also installed on the inner side of the bite plate. The test base surface is also fixedly connected with an adjustable suction electromagnet, and the adjustable suction electromagnet is located on the inner side of the dental mold module. The dental mold module is also provided with a saliva simulation mechanism on one side for spraying the dental mold module to achieve lubrication purposes.

[0006] As an optional solution of the orthodontic appliance friction force measuring device and the use method, the side of the guide frame facing the occlusion simulation module is arc-shaped, and the two sides of the guide frame are convex. The guide frame is connected with the occlusion simulation module in a sliding manner through the convex blocks.

[0007] As an optional solution of the orthodontic appliance friction force measuring device and the use method, the dental mold module includes simulated teeth, and the side of each simulated tooth facing the test base is fixedly connected with a fixed body. The outer side of the fixed body is fixedly connected with a covering sleeve, and the covering sleeve is embedded in the test base and fixedly connected with the test base.

[0008] As an optional solution of the orthodontic appliance friction force measuring device and the use method, the covering sleeve is made of rubber soft plate.

[0009] As an optional solution of the orthodontic appliance friction force measuring device and the use method, the use method is as follows: Step one: connect one end of the arch wire with the fixed force gauge, pass the arch wire through the inside of the bracket on the outside of the dental mold module in sequence, and connect the other end of the arch wire with the force measuring module; Step two: slowly pull the arch wire through the force measuring module, and gradually display the friction force value through the mobile force gauge inside the installation frame. Meanwhile, the micro strain gauge inside the bracket can accurately detect the friction force between the single bracket and the arch wire; Step three: during the friction force test, cover the occlusion plate on the dental mold module through the occlusion simulation module to test the friction force of each part under the occlusion state; Step four: during the test, spray water on the surface of the dental mold module through the saliva simulation mechanism to simulate the oral saliva condition, increase the lubrication of the arch wire and the bracket, and ensure the authenticity of the simulation; Step five: when the dental mold module and the occlusion plate are in contact, move the occlusion plate through the hydraulic push rod to simulate the orthodontic friction force under the occlusion state of the upper and lower teeth misalignment.

[0010] In the orthodontic process, the orthodontic force needs to overcome the friction to act on the teeth to realize the correction of the teeth, when the friction is too large, most of the orthodontic force is offset by the friction, the "effective force" actually acting on the teeth is insufficient, the tooth movement speed slows down, the treatment time is prolonged, if the friction is greater than the force required for tooth movement, the tooth may appear "crown tilt" and "increased risk of tooth root absorption", therefore, it is very important to accurately know the size of the friction in the orthodontic treatment process, so that the doctor can set the appliance, which is helpful for the correction of the teeth, by installing the arch wire in the multiple simulated tooth outside the bracket, the arch wire is pulled by the force measuring module, the friction between the arch wire and the bracket is measured, when the force measuring module pulls the arch wire, the fixed force gauge shows the value, which indicates that the friction measured by the force measuring module is the total value of the friction between the arch wire and the bracket, which is used for subsequent installation and adjustment of the appliance, and the inside of the bracket is also provided with a micro strain gauge for separately measuring the friction between the single bracket and the arch wire, when the friction value is obviously larger, it indicates that the arch wire and the bracket at the position need to be adjusted to ensure the stable correction of the teeth in the subsequent process; When measuring the orthodontic friction, the occlusion simulation module drives the occlusion plate to flip, the tooth module and the occlusion plate are matched, the occlusion state friction can be simulated, and the hydraulic push rod is arranged to drive the occlusion plate to move above the tooth module when the tooth module and the occlusion plate are in contact, so as to simulate the friction between the arch wire and the bracket when the food is bitten and shaken, and the friction in multiple conditions is measured; The cladding sleeve is arranged on the outside of the fixed body, the cladding sleeve has a certain elasticity, the tooth movement to a certain extent can be simulated, and the measured data is more real; The surface of the test base is also provided with a suction adjustable electromagnet, the suction adjustable electromagnet and the iron plate are matched, the pressure condition when the tooth module and the occlusion plate are in contact can be ensured, and the suction of the suction adjustable electromagnet is adjustable, the friction in multiple pressure conditions is simulated, and the installation of the appliance is facilitated.

[0011] As an optional solution of the orthodontic appliance friction measuring device and the using method, the force measuring module includes an installation frame fixedly connected with the test base, a first motor fixedly connected with the inside of the installation frame, a threaded shaft fixedly connected with the main shaft of the first motor, a threaded sleeve spirally connected with the outside of the threaded shaft, and a moving force gauge fixedly connected with the other end of the threaded sleeve, and the force measuring end of the moving force gauge is connected with the arch wire; The outside of the moving force gauge is in sliding connection with the inside of the installation frame.

[0012] In the process of measuring the friction force, the threaded shaft is driven to rotate by the first motor, the threaded sleeve is driven to move by the threaded shaft, thereby pulling the mobile force gauge to move, at this time, the arch wire can be slowly and uniformly moved, and when the fixed force gauge preliminarily displays a value, the value of the mobile force gauge is the friction value between the arch wire and the bracket.

[0013] As an optional solution of the orthodontic appliance friction force measuring device and the use method, the occlusion simulation module comprises an embedded table embedded in the test base, and a guide table is fixedly connected to the outside of the embedded table, and a through groove is formed in the inside of the guide table; The second motor is fixedly connected to the inside of the embedded table, the free end of the second motor is fixedly connected with a connecting plate, the connecting plate is arranged in the inside of the guide table and is in sliding connection with the guide table, the other end of the connecting plate is fixedly connected with a connecting plate, and the outside of the connecting plate is in sliding connection with the guide table through the through groove, and the two ends of the through groove are in sliding connection with the sliding table; The outside of the guide table is provided with a guide groove, and the guide table is in sliding connection with the guide frame through the guide groove.

[0014] As an optional solution of the orthodontic appliance friction force measuring device and the use method, the through groove is in 1 / 2 circular shape and penetrates through the two end faces of the guide table.

[0015] When the occlusion plate is turned over, the connecting plate is driven to rotate by the second motor, so that the connecting plate moves along the track of the through groove, and the occlusion plate covers the top of the dental mold module, and the arrangement of the guide frame can ensure that the hydraulic push rod rotates smoothly, and the movement of the hydraulic push rod can drive the occlusion plate to move, thereby simulating the friction force between the arch wire and the bracket when the upper and lower teeth are misaligned.

[0016] As an optional solution of the orthodontic appliance friction force measuring device and the use method, the saliva simulation mechanism comprises a hollow frame fixedly connected with the test base, a plurality of nozzles are fixedly connected to the side of the hollow frame facing the dental mold module, a communication pipe is communicated with the other side of the hollow frame, and a water pump is connected to the other end of the communication pipe.

[0017] The water body is pumped out through the communication pipe and the hollow frame by the external water pump, and then sprayed out through the nozzles, at this time, the dental mold module is sprayed to simulate the oral saliva condition, and the measured data is more real.

[0018] Compared with the prior art, the orthodontic appliance friction force measuring device and the use method have the following beneficial effects: The archwire is installed inside the bracket outside the plurality of simulated teeth, the friction force between the archwire and the bracket is measured by pulling the archwire through the force measuring module, the fixed force gauge shows the value when the force measuring module pulls the archwire, which indicates that the friction force measured by the force measuring module is the total value of the friction force between the archwire and the bracket, which is convenient for subsequent installation and adjustment of the appliance, and the inside of the bracket is also provided with a micro strain gauge for separately measuring the friction force between the single bracket and the archwire, when the friction force value is obviously larger, it indicates that the archwire and the bracket at the position need to be adjusted, and the stable correction of the teeth is ensured; And when measuring the orthodontic friction force, the occlusion simulation module drives the occlusion plate to flip, the tooth mold module and the occlusion plate are matched, the friction force in the occlusion state can be simulated, and the hydraulic push rod is arranged to drive the occlusion plate to move above the tooth mold module when the tooth mold module and the occlusion plate are in contact, so as to simulate the friction force between the archwire and the bracket when the teeth are shaken due to biting food, and the friction force in multiple situations is measured; The cladding sleeve is arranged outside the fixed body, the cladding sleeve has a certain elasticity, the movement of the teeth to a certain extent can be simulated, and the measured data is more real; The surface of the test base is also provided with a suction adjustable electromagnet, the suction adjustable electromagnet and the iron plate are matched, the pressure condition when the tooth mold module and the occlusion plate are in contact can be ensured, the suction of the suction adjustable electromagnet is adjustable, the friction force in multiple pressure conditions is simulated, and the installation work of the subsequent appliance is facilitated; When the occlusion plate flips, the second motor drives the connecting plate to rotate, so that the connecting plate moves along the track of the through groove, the occlusion plate covers the tooth mold module, and the arrangement of the guide frame can ensure that the hydraulic push rod rotates smoothly, the movement of the hydraulic push rod can drive the occlusion plate to move, and the friction force between the archwire and the bracket when the upper and lower teeth are misaligned is simulated. DETAILED DESCRIPTION

[0019] Figure 1 It is a whole structure schematic view of the orthodontic appliance friction force measuring device and the using method; Figure 2 It is a structure schematic view of a tooth mold module of the orthodontic appliance friction force measuring device and the using method; Figure 3 It is an installation structure schematic view of a micro strain gauge of the orthodontic appliance friction force measuring device and the using method; Figure 4 It is a structure schematic view of a force measuring module of the orthodontic appliance friction force measuring device and the using method; Figure 5 It is a structure schematic view of an occlusion simulation module of the orthodontic appliance friction force measuring device and the using method; Figure 6 It is a kind of orthodontic appliance friction force measuring device and the structure diagram of connecting plate for method for using; Figure 7 It is a kind of orthodontic appliance friction force measuring device and the structure diagram of sliding table for method for using; Figure 8 It is a kind of orthodontic appliance friction force measuring device and the structure diagram of guiding frame for method for using.

[0020] In the figure: 1, test base;2, dental model module;201, simulated tooth body;202, fixed body;203, covering sleeve;3, fixed force gauge;4, arch wire;5, bracket;6, micro strain gauge;7, adjustable suction electromagnet;8, force measuring module;801, mounting frame;802, first motor;803, threaded shaft;804, threaded sleeve;805, moving force gauge;9, occlusion simulation module;901, guiding table;902, embedded table;903, second motor;904, connecting plate;905, through slot;906, guiding slot;907, connecting plate;10, sliding table;11, occlusion plate;12, guiding frame;13, hydraulic push rod;14, iron plate;15, hollow frame;16, nozzle;17, communication pipe. DETAILED DESCRIPTION

[0021] Example 1: please see Figure 1 、 Figure 2 、 Figure 3 、 Figure 7 And Figure 8 , the present application provides a technical solution: A kind of orthodontic appliance friction force measuring device and method for using, including test base 1; The surface of test base 1 is installed with the multiple dental model modules 2 of evenly distributed arc-shaped trajectory setting, the side of dental model module 2 is all installed with bracket 5, the inner side of bracket 5 is all installed with micro strain gauge 6, the inner side of bracket 5 is also worn with arch wire 4, one end of arch wire 4 is fixedly connected with fixed force gauge 3, the outer side of fixed force gauge 3 is fixedly connected with test base 1, the other end of arch wire 4 is fixedly connected with force measuring module 8; The central part of test base 1 is embedded with occlusion simulation module 9, the two sides of occlusion simulation module 9 are slidably connected with sliding table 10, the other end of sliding table 10 is fixedly connected with occlusion plate 11; The outer side of occlusion simulation module 9 is also slidably connected with guiding frame 12, the other end of guiding frame 12 is fixedly connected with hydraulic push rod 13, the free end of hydraulic push rod 13 is fixedly connected with occlusion plate 11; The inner side of occlusion plate 11 is also installed with iron plate 14; Test base 1 surface is also fixedly connected with adjustable suction electromagnet 7, and adjustable suction electromagnet 7 is located at the inner side of dental model module 2; The side of the dental mold module 2 is also provided with a saliva simulation mechanism for spraying the dental mold module 2 to play a lubricating purpose.

[0022] The side of the guide frame 12 facing the occlusion simulation module 9 is arc-shaped, and the two sides of the guide frame 12 are protruding, and the guide frame 12 is in sliding connection with the occlusion simulation module 9 through the protruding blocks.

[0023] The dental mold module 2 comprises simulation teeth 201, and the side of the simulation teeth 201 facing the test base 1 is fixedly connected with a fixed body 202.

[0024] The covering sleeve 203 is made of rubber soft plate.

[0025] The use method is as follows: Step one: connect one end of the arch wire 4 with the fixed force gauge 3, and the arch wire 4 passes through the inside of the bracket 5 on the outside of the dental mold module 2 in sequence, and the other end of the arch wire 4 is connected with the force module 8; Step two: slowly pull the arch wire 4 through the force module 8, and the moving force gauge 805 inside the installation frame 801 gradually displays the friction force value, and the micro strain gauge 6 inside the bracket 5 can accurately detect the friction force between the single bracket 5 and the arch wire 4; Step three: during the friction force test, the occlusion plate 11 is covered above the dental mold module 2 through the occlusion simulation module 9, for testing the friction force of each part under the occlusion state; Step four: during the test, the saliva simulation mechanism is used to spray water on the surface of the dental mold module 2 to simulate the oral saliva condition, increase the lubrication of the arch wire 4 and the bracket 5, and ensure the authenticity of the simulation; Step five: when the dental mold module 2 and the occlusion plate 11 are in contact, the hydraulic push rod 13 drives the occlusion plate 11 to move, which can simulate the orthodontic friction force under the occlusion state of the upper and lower teeth misalignment.

[0026] In the orthodontic process, the orthodontic force needs to overcome the friction to act on the teeth to realize the correction of the teeth, when the friction is too large, most of the orthodontic force is offset by the friction, the 'effective force' actually acting on the teeth is insufficient, the tooth movement speed slows down, the treatment time is prolonged, if the friction is greater than the force required for tooth movement, the tooth may appear 'crown tilt' 'risk of increased root absorption', because the tooth cannot move as a whole, the tooth root is stressed concentrated, therefore, it is very important to accurately know the size of the friction in the orthodontic treatment process, so that the doctor can set the appliance, which is helpful for the correction of the teeth, the device is provided with an arch wire 4 inside the bracket 5 outside a plurality of simulated teeth 201, the friction between the arch wire 4 and the bracket 5 is measured by pulling the arch wire 4 through the force measuring module 8, when the force measuring module 8 pulls the arch wire 4, the fixed force gauge 3 just displays the value, which indicates that the friction measured by the force measuring module 8 is the total value of the friction between the arch wire 4 and the bracket 5, which is used to facilitate the subsequent installation and adjustment of the appliance, and the inside of the bracket 5 is also provided with a micro strain gauge 6 for separately measuring the friction between the single bracket 5 and the arch wire 4, when the friction value is obviously larger, it indicates that the arch wire 4 and the bracket 5 at this position need to be adjusted to ensure the stable correction of the tooth in the subsequent process; When measuring the orthodontic friction, the occlusion simulation module 9 drives the occlusion plate 11 to flip, realizes the cooperation of the tooth mold module 2 and the occlusion plate 11, can simulate the friction under the occlusion state, and the hydraulic push rod 13 can drive the occlusion plate 11 to move above the tooth mold module 2 when the tooth mold module 2 and the occlusion plate 11 contact, which is used to simulate the friction between the arch wire 4 and the bracket 5 when the occlusion plate 11 shakes due to the food, and realizes the measurement of the friction under various conditions; The cladding sleeve 203 is arranged outside the fixed body 202, the cladding sleeve 203 has a certain elasticity, can simulate the movement of the tooth to a certain extent, simulate the periodontal membrane, and thus can ensure that the data measured is more real; The surface of the test base 1 is also provided with a suction adjustable electromagnet 7, the suction adjustable electromagnet 7 and the iron plate 14 cooperate to ensure the pressure condition when the tooth mold module 2 and the occlusion plate 11 contact, and the suction of the suction adjustable electromagnet 7 is adjustable, which simulates the friction under various pressure conditions, and is helpful for the subsequent installation of the appliance; It also includes the following contents: The guide frame 12 is arranged to facilitate the rotation of the hydraulic push rod 13 when the occlusion plate 11 flips, one side of the guide frame 12 is arranged in a plane, which is convenient for cooperation with the occlusion simulation module 9 and stable sliding, a part of the occlusion simulation module 9 is embedded into the test base 1, which ensures that the occlusion plate 11 is stably covered above the tooth mold module 2 when the occlusion plate 11 flips; A customized micro strain gauge 6 is arranged inside each bracket 5, which can accurately measure the friction between the single bracket 5 and the arch wire 4, and can help to read the data with large deviation caused by some installation errors, so as to facilitate timely inspection.

[0027] Embodiment 2: This embodiment is an improvement on embodiment 1, please refer to Figure 4 , Specifically, the force measuring module 8 comprises a mounting frame 801 fixedly connected with the test base 1, a first motor 802 fixedly connected to the inner side of the mounting frame 801, a threaded shaft 803 fixedly connected to the main shaft end of the first motor 802, a threaded sleeve 804 screw-connected to the outer side of the threaded shaft 803, a mobile force gauge 805 fixedly connected to the other end of the threaded sleeve 804, and the force measuring end of the mobile force gauge 805 is connected with the arch wire 4. The outer side of the mobile force gauge 805 is in sliding connection with the inner side of the mounting frame 801.

[0028] During the measurement of the friction, the threaded shaft 803 is driven to rotate by the first motor 802, the threaded sleeve 804 is moved by the threaded shaft 803, and the mobile force gauge 805 is moved by the threaded sleeve 804, so that the arch wire 4 can be moved slowly and uniformly at this time. When the fixed force gauge 3 displays the initial value, the value of the mobile force gauge 805 is the friction value between the plurality of arch wires 4 and the brackets 5.

[0029] Embodiment 3: This embodiment is an improvement on embodiment 2, please refer to Figure 5 and Figure 6 , Specifically, the occlusion simulation module 9 comprises an embedded table 902 embedded in the test base 1, a guide table 901 fixedly connected to the outer side of the embedded table 902, and a through groove 905 formed in the inner side of the guide table 901. The embedded table 902 is fixedly connected with a second motor 903, the free end of the second motor 903 is fixedly connected with a connecting plate 904, the connecting plate 904 is arranged in the guide table 901 and is in sliding connection with the guide table 901, the other end of the connecting plate 904 is fixedly connected with a connecting plate 907, the outer side of the connecting plate 907 is in sliding connection with the guide table 901 through the through groove 905, and the two ends of the through groove 905 are in sliding connection with the sliding table 10. The outer side of the guide table 901 is provided with a guide groove 906, and the guide table 901 is in sliding connection with the guide frame 12 through the guide groove 906.

[0030] The through groove 905 is arranged in a 1 / 2 circular shape, and the through groove 905 penetrates through the two end faces of the guide table 901.

[0031] When the occlusal plate 11 is turned over, the connecting plate 904 is driven to rotate by the second motor 903, so that the connecting plate 907 moves along the track of the through groove 905, and the occlusal plate 11 covers the dental mold module 2, and the guide frame 12 is arranged to ensure that the hydraulic push rod 13 rotates smoothly, and the movement of the hydraulic push rod 13 drives the occlusal plate 11 to move, simulating the friction force of the arch wire 4 and the bracket 5 when the upper and lower teeth are misaligned; Further comprising the following contents; The embedded table 902 is arranged inside the test base 1, the upper guide table 901 is arranged above the test base 1, when the occlusal plate 11 is turned over, one side of the occlusal plate 11 can stably cover the dental mold module 2, the guide groove 906 cooperates with the guide frame 12 to ensure that the guide frame 12 stably slides in the guide groove 906, the connecting plate 904 slides in the guide table 901 to ensure that the connecting plate 907 slides in the through groove 905; The second motor 903 rotates within a range of 180°, and the connecting plate 904, the connecting plate 907 and the sliding table 10 on the outside are driven to rotate by the forward and reverse rotation of the second motor 903, so as to realize the cooperation and separation of the occlusal plate 11 and the dental mold module 2; The inside of the sliding table 10 is provided with a rectangular sliding groove, which cooperates with the connecting plate 907 to realize the sliding purpose, and avoids the rotation of the connecting plate 907 and the sliding table 10.

[0032] Embodiment 4: This embodiment is an improvement on embodiment 3, please refer to Figure 1 , specifically, the saliva simulation mechanism comprises a hollow frame 15 fixedly connected with the test base 1, a plurality of nozzles 16 are fixedly connected to one side of the hollow frame 15 facing the dental mold module 2, the other side of the hollow frame 15 is communicated with a communication pipe 17, and the other end of the communication pipe 17 is externally connected with a water pump.

[0033] The water body is pumped out through the communication pipe 17 and the hollow frame 15 by the external water pump, and then sprayed out through the nozzle 16, at this time, the dental mold module 2 is sprayed to simulate the oral cavity saliva, and the measured data is more real, and the plurality of nozzles 16 can fully spray the plurality of dental mold modules 2.

[0034] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above examples are only used to help understand the method of the present application and its core idea. The above description is only the preferred implementation manner of the present application, and it should be noted that, due to the limited expression of the text, there are objectively infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, refinements or changes can be made without departing from the principles of the present application, and the above technical features can also be combined in an appropriate manner; the improvements, refinements, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, shall be regarded as the protection scope of the present application.

Claims

1. A device for measuring the friction force of orthodontic appliances, characterized in that: Including the test base (1); Multiple dental model modules (2) are evenly distributed in an arc-shaped trajectory on the surface of the test base (1). Each dental model module (2) has a bracket (5) installed on one side. Each bracket (5) has a micro strain gauge (6) installed on the inner side of the bracket (5). An archwire (4) is also threaded through the inner side of the bracket (5). One end of the archwire (4) is fixedly connected to a fixed force gauge (3). The outer side of the fixed force gauge (3) is fixedly connected to the test base (1). The other end of the archwire (4) is fixedly connected to a force measuring module (8). The test base (1) has a bite simulation module (9) embedded in the center. Both sides of the bite simulation module (9) are slidably connected to a sliding table (10), and the other end of the sliding table (10) is fixedly connected to a bite plate (11). The outer side of the bite simulation module (9) is also slidably connected to a guide frame (12), and the other end of the guide frame (12) is fixedly connected to a hydraulic push rod (13). The free end of the hydraulic push rod (13) is fixedly connected to the bite plate (11). An iron plate (14) is also installed on the inner side of the bite plate (11). The test base (1) is also fixedly connected to an adjustable electromagnet (7), and the adjustable electromagnet (7) is located inside the dental model module (2); A saliva simulation mechanism is also provided on one side of the dental model module (2) for spraying the dental model module (2) to achieve lubrication.

2. The orthodontic appliance friction force measuring device according to claim 1, characterized in that: The guide frame (12) is set with an arc surface on the side facing the bite simulation module (9), and the guide frame (12) is set with protrusions on both sides. The guide frame (12) is slidably connected to the bite simulation module (9) through the protrusions.

3. The orthodontic appliance friction force measuring device according to claim 1, characterized in that: The dental model module (2) includes a simulated tooth body (201). A fixing body (202) is fixedly connected to the side of the simulated tooth body (201) facing the test base (1). A covering sleeve (203) is fixedly connected to the outside of the fixing body (202). The covering sleeve (203) is embedded inside the test base (1) and is fixedly connected to the test base (1).

4. The orthodontic appliance friction force measuring device according to claim 3, characterized in that: The cover (203) is made of rubber soft sheet.

5. The orthodontic appliance friction force measuring device according to claim 1, characterized in that: The force measuring module (8) includes a mounting frame (801) fixedly connected to the test base (1). A first motor (802) is fixedly connected to the inner side of the mounting frame (801). A threaded shaft (803) is fixedly connected to the end of the main shaft of the first motor (802). A threaded sleeve (804) is screwed to the outer side of the threaded shaft (803). A movable force gauge (805) is fixedly connected to the other end of the threaded sleeve (804). The force measuring end of the movable force gauge (805) is connected to the bow wire (4). The outer side of the movable force gauge (805) is slidably connected to the inner side of the mounting frame (801).

6. The orthodontic appliance friction force measuring device according to claim 1, characterized in that: The bite simulation module (9) includes an embedding platform (902) embedded inside the test base (1), a guide platform (901) is fixedly connected to the outside of the embedding platform (902), and a through groove (905) is opened inside the guide platform (901). The second motor (903) is fixedly connected inside the embedded platform (902). The free end of the second motor (903) is fixedly connected to the connecting plate (904). The connecting plate (904) is set inside the guide platform (901) and is slidably connected to the guide platform (901). The other end of the connecting plate (904) is fixedly connected to the connecting plate (907). The outer side of the connecting plate (907) is slidably connected to the guide platform (901) through the through groove (905). The two ends of the through groove (905) are slidably connected to the sliding platform (10). The guide platform (901) has a guide groove (906) on its outer side, and the guide platform (901) is slidably connected to the guide frame (12) through the guide groove (906).

7. The orthodontic appliance friction force measuring device according to claim 6, characterized in that: The through groove (905) is set in a 1 / 2 circle and passes through both ends of the guide platform (901).

8. The orthodontic appliance friction force measuring device according to claim 1, characterized in that: The saliva simulation mechanism includes a hollow frame (15) fixedly connected to the test base (1). On the side of the hollow frame (15) facing the dental model module (2), there are uniformly distributed nozzles (16). On the other side of the hollow frame (15), there is a connecting pipe (17). The other end of the connecting pipe (17) is connected to a water pump.

9. A method of using the orthodontic appliance friction force measuring device according to any one of claims 1-8, characterized in that: The usage method is as follows: Step 1: Connect one end of the archwire (4) to the fixed force gauge (3), and pass the archwire (4) through the inside of the bracket (5) on the outside of the dental mold module (2) in sequence. Connect the other end of the archwire (4) to the force measuring module (8). Step 2: Slowly pull the bowwire (4) through the force measuring module (8), and gradually display the friction force value through the movable force gauge (805) inside the mounting frame (801). At the same time, the micro strain gauge (6) inside the bracket (5) can accurately detect the friction force between a single bracket (5) and the bowwire (4). Step 3: During the friction test, the occlusal simulation module (9) drives the occlusal plate (11) to cover the dental model module (2) to test the friction of each part under the occlusal state; Step 4: During the test, water is sprayed onto the surface of the dental model module (2) using a saliva simulation mechanism to simulate oral saliva conditions, increase the lubrication of the archwire (4) and bracket (5), and ensure the realism of the simulation. Step 5: When the dental model module (2) and the occlusal plate (11) come into contact, the occlusal plate (11) is moved by the hydraulic push rod (13), which can simulate the orthodontic friction force when the upper and lower teeth are misaligned under the occlusal state.

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