A dental device for testing the shear bond strength of a dental adhesive
By designing a shear bond strength testing device for dental teeth, the problems of large size, high price and open testing environment of existing equipment are solved. It realizes the diverse testing of tooth bond strength under constant environment, and improves the accuracy and human simulation of the test results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINBIAO TESTING (GUANGDONG) CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-06-26
AI Technical Summary
Existing dental shear bond strength testing equipment is large, expensive, and requires an open testing environment, making it difficult to accurately reflect the bond strength between teeth and bonding materials. Furthermore, the testing conditions are limited and cannot simulate the offset phenomenon during human occlusion.
A shear bond strength testing device for dental teeth after bonding was designed, comprising a support plate, an electric push rod, a thrust sensor, a clamp, a heat insulation cover, and a torsion testing structure. Shear force testing is performed by bidirectionally moving the clamp, and human occlusal offset is simulated during the test. A constant testing environment is maintained by using a heat insulation cover and an electrostatic heat insulation patch.
It enables diverse testing of tooth bonding strength under constant conditions, and the test results are more consistent with the human use environment, reducing the influence of the external environment and improving the accuracy and diversity of the test results.
Smart Images
Figure CN224416683U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of materials testing technology, specifically to a device for testing the shear bond strength of dental teeth after bonding. Background Technology
[0002] In the field of dental restoration, dental bonding technology is a crucial means of restoring tooth structure and function, making its performance evaluation particularly important. Shear bond strength, as a vital indicator of the strength of the bond between the bonding material and the tooth structure, directly relates to the stability and durability of the restoration. Traditional shear bond strength testing methods often result in significant fluctuations in results due to variations in testing conditions, procedures, and sample preparation, making it difficult to accurately reflect the actual performance of the bonding material.
[0003] The patent titled "A Shear Bond Strength Testing Device for Dental Materials Bonded to Teeth," publication number CN220650424U, proposes a device for testing the shear bond strength of teeth bonded to dental materials. This device utilizes universal testing machines for tensile, compression, bending, and shear tests, but these machines are large, expensive, and inconvenient for widespread use. There is currently no dedicated small-scale device for testing the shear bond strength of teeth bonded to dental materials. This device, however, can be specifically used for real-time shear bond strength testing of extracted teeth and bonded dental materials, quantifying the bond strength of different materials to teeth. However, its testing direction is relatively singular, and the testing environment is open. Since testing with dental teeth requires strict temperature control, this patent proposes a device for testing the shear bond strength of teeth bonded to dental materials. Utility Model Content
[0004] The purpose of this invention is to provide a device for testing the shear bond strength of dental teeth after bonding, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a dental shear bond strength testing device for bonded teeth, comprising a support plate, a mounting plate fixedly connected to the support plate, an electric push rod fixedly connected to the outside of the mounting plate, a vertical plate fixedly connected to the piston rod end of the electric push rod, a thrust sensor mounted on the outside of the vertical plate, a contact plate mounted on the outside of the thrust sensor, a first clamping plate and a second clamping plate mounted on the support plate via a movable component, a V-shaped portion being formed on an adjacent side of the first clamping plate and the second clamping plate, a torque testing structure being mounted on the outside of the V-shaped portion, a heat insulation cover fixedly connected to the support plate, a contact groove being formed on the outside of the second clamping plate, and a heating wire being installed inside the first clamping plate and the second clamping plate.
[0006] Preferably, the torque testing structure includes an L-shaped positioning plate, which is fixedly connected to the outside of the heat insulation cover. A torque testing motor is fixedly connected to the outside of the L-shaped positioning plate. A torque sensor is installed on the output shaft of the torque testing motor. A first torsion seat and a second torsion seat are rotatably connected to the inner center of the first clamping plate and the second clamping plate, respectively. A V-shaped portion identical to that of the first clamping plate and the second torsion seat is opened on an adjacent side. The contact groove is located outside the second torsion seat.
[0007] Preferably, the moving component includes two micro drive motors, which are fixedly connected to one side of the support plate. The support plate has two sliding grooves on its outer side, and a bidirectional lead screw is rotatably connected inside the sliding grooves. The output shaft of the micro drive motor passes through the outer wall of the support plate and is rotatably connected to one end of the bidirectional lead screw. Two moving seats are threaded to the outer side of the two bidirectional lead screws respectively. The four moving seats are divided into two groups, in which the first moving seat is fixedly connected to the bottom of the first clamping plate, and the other group of moving seats is fixedly connected to the bottom of the second clamping plate.
[0008] Preferably, a laser transmitter is fixedly connected to the outside of the upright plate, a measuring scale plate is fixedly connected to the support plate, and a measuring scale is connected to the outside of the measuring scale plate.
[0009] Preferably, the heat insulation cover is hinged to a transparent shielding door.
[0010] Preferably, the support plate has two guide grooves, and the bottom of the upright plate is integrally formed with a limiting block, which is slidably connected to the inside of the guide groove.
[0011] Preferably, the exterior of the first clamping plate is covered with electrostatic heat-insulating stickers.
[0012] Compared with the prior art, the beneficial effects of this utility model are:
[0013] In this invention, the shear force of the bonded teeth is tested by bidirectionally moving the first and second clamps. During the test, the first and second clamps are covered by an insulation cover and a transparent shielding door, along with multiple electrostatic insulation stickers, so that the test environment is relatively constant and the influence of the external environment on the test process is reduced.
[0014] In this invention, during the shear force test, the first torsion seat can be rotated by a torque testing motor. When the first torsion seat rotates, it will cause the teeth in contact with the contact plate to rotate. During each rotation, there is a slight rotational offset, which simulates the slight offset phenomenon that occurs during human biting. This further increases the diversity of the strength test, increases the data results, and makes the test results more consistent with the usage environment during human use. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;
[0016] Figure 2 This is a schematic diagram of the shielding state structure of the electrostatic heat preservation sticker in an embodiment of this utility model;
[0017] Figure 3 This is a schematic diagram of the structure of the first clamping plate and the second clamping plate in an embodiment of this utility model;
[0018] Figure 4 This is a schematic diagram of the structure of the first torsion seat and the second torsion seat in an embodiment of this utility model;
[0019] Figure 5 This is a schematic diagram of the guide groove in an embodiment of the present invention.
[0020] In the diagram: 100, Support plate; 101, Mounting plate; 102, Electric push rod; 103, Vertical plate; 104, Thrust sensor; 105, Contact plate; 106, First clamping plate; 107, Second clamping plate; 108, Miniature drive motor; 109, Bidirectional lead screw; 110, Moving seat; 111, Contact groove; 200, L-shaped positioning plate; 201, Torque testing motor; 202, Torque sensor; 203, First torsion seat; 204, Second torsion seat; 300, Electrostatic insulation sticker; 400, Insulation cover; 401, Transparent shielding door; 500, Laser emitter; 501, Measuring scale plate; 600, Guide groove. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Example 1, such as Figure 1As shown, this application discloses a dental shear bond strength testing device for bonded teeth, comprising a support plate 100, a mounting plate 101 fixedly connected to the support plate 100, an electric push rod 102 fixedly connected to the outside of the mounting plate 101, a vertical plate 103 fixedly connected to the piston rod end of the electric push rod 102, a thrust sensor 104 mounted on the outside of the vertical plate 103, a contact plate 105 mounted on the outside of the thrust sensor 104, a first clamping plate 106 and a second clamping plate 107 mounted on the support plate 100 via a moving assembly, a V-shaped portion being provided on an adjacent side of the first clamping plate 106 and the second clamping plate 107, a torque testing structure being mounted on the outside of the V-shaped portion, a heat insulation cover 400 fixedly connected to the support plate 100, a contact groove 111 being provided on the outside of the second clamping plate 107, and heating wires being installed inside the first clamping plate 106 and the second clamping plate 107.
[0023] Specifically, during use, the staff can place the tooth to be tested between the first clamp 106 and the second clamp 107. After placement, the moving mechanism is activated to bring the first clamp 106 and the second clamp 107 closer together. While they are continuously close to each other, the V-shaped surfaces of the first clamp 106 and the second clamp 107 are used to position and engage the tooth. After positioning and engaging, the heating wires located inside the first clamp 106 and the second clamp 107 are activated to heat the tooth to be tested during the test, so as to reach the temperature required for the test. The tooth is then insulated by an external heat insulation cover 400.
[0024] Furthermore, after the teeth to be tested are fixed, the electric push rod 102 is activated to move the upright plate 103. The upright plate 103 drives the thrust sensor 104 and the contact plate 105 to pass through the contact groove 111 to apply shear force to the teeth, thereby testing the shear strength of the bonded teeth. During the test, the thrust sensor 104 is used to detect the degree of shearing.
[0025] like Figure 5 As shown, the moving component includes two micro drive motors 108, which are fixedly connected to one side of the support plate 100. Two sliding grooves are opened on the outside of the support plate 100, and a bidirectional lead screw 109 is rotatably connected inside the sliding groove. The output shaft of the micro drive motor 108 passes through the outer wall of the support plate 100 and is rotatably connected to one end of the bidirectional lead screw 109. Two moving seats 110 are threaded to the outside of the two bidirectional lead screws 109 respectively. The four moving seats 110 are divided into two groups. One group of moving seats 110 is fixedly connected to the bottom of the first clamping plate 106, and the other group of moving seats 110 is fixedly connected to the bottom of the second clamping plate 107.
[0026] Specifically, in the moving assembly, when the worker places the tooth between the first clamp 106 and the second clamp 107, the two micro drive motors 108 are activated to drive the bidirectional lead screw 109 to rotate. As the bidirectional lead screw 109 rotates, it will drive the two sets of moving seats 110 to move closer to each other. As the two sets of moving seats 110 continue to move closer to each other, they will drive the first clamp 106 and the second clamp 107 to move closer to each other, thereby clamping and limiting the tooth through the first clamp 106 and the second clamp 107.
[0027] like Figures 2-3 As shown, a laser transmitter 500 is fixedly connected to the outside of the upright plate 103, and a measuring scale plate 501 is fixedly connected to the support plate 100. A measuring scale is connected to the outside of the measuring scale plate 501.
[0028] Specifically, during use, as the electric push rod 102 moves the upright plate 103, the laser emitter 500 is turned on to irradiate the measuring scale plate 501 with a laser, so that the staff can observe from the outside the position where the upright plate 103 moves the thrust sensor 104 and the contact plate 105.
[0029] like Figure 1 As shown, the heat insulation cover 400 is hinged to a transparent shielding door 401 on the outside.
[0030] Specifically, during use, the transparent shielding door 401 hinged to the outside of the insulation cover 400 can seal the insulation cover 400, reducing the impact of the external environment on the internal test during the test, and also providing a certain insulation effect.
[0031] like Figure 5 As shown, the support plate 100 has two guide grooves 600, and the bottom of the upright plate 103 is integrally formed with a limiting block, which is slidably connected to the inside of the guide groove 600.
[0032] Specifically, during use, the two guide grooves 600 are used to guide the limiting block at the bottom of the upright plate 103 and assist the movement of the upright plate 103.
[0033] like Figure 2 As shown, the exterior of the first clamping plate 106 is covered with electrostatic heat-insulating stickers 300.
[0034] Specifically, the electrostatic insulation sticker 300 is a self-adhesive insulation sticker with an external electrostatic coating. It can be adhered to the outside of the first clamping plate 106 and the second clamping plate 107 to achieve a sealing effect and reduce the influence of the external ambient temperature on the internal measurement process.
[0035] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: Compared with the prior art, in this embodiment, the shear force test of the bonded teeth is performed by bidirectionally moving the first clamp 106 and the second clamp 107. During the test, the first clamp 106 and the first clamp 107 are completely covered by the heat insulation cover 400 and the transparent shielding door 401 in conjunction with multiple electrostatic heat insulation stickers 300, so that the test environment is relatively constant and the influence of the external environment on the test process is reduced.
[0036] Example 2: Considering that teeth do not bite the food body perpendicularly during use, and that food sometimes rotates and moves between teeth during chewing, resulting in different shear forces, the following technical solution is proposed to solve the above-mentioned technical problems:
[0037] like Figures 2-5 As shown, the torque testing structure includes an L-shaped positioning plate 200, which is fixedly connected to the outside of the heat insulation cover 400. A torque testing motor 201 is fixedly connected to the outside of the L-shaped positioning plate 200. A torque sensor 202 is installed on the output shaft of the torque testing motor 201. A first torsion seat 203 and a second torsion seat 204 are rotatably connected to the inner center of the first clamping plate 106 and the second clamping plate 107, respectively. The first torsion seat 203 and the second torsion seat 204 are provided with a V-shaped part on the side adjacent to each other, which is the same as that of the first clamping plate 106 and the second clamping plate 107. The contact groove 111 is located on the outside of the second torsion seat 204.
[0038] Specifically, during use, when the first clamp 106 and the second clamp 107 are fully in contact with the bonded teeth, the torque test motor 201 can be activated. When the torque test motor 201 is activated, it can drive the first torsion seat 203 to rotate. During the shear force test, the torque test motor 201 drives the first torsion seat 203 to rotate by no more than 5-15° each time, simulating the slight offset phenomenon that will occur during the biting process. Overall, this reduces the need to further increase the data source during the test. During the rotation of the torque test motor 201, the rotation angle of the torque test motor 201 is recorded by the torque sensor 202.
[0039] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: Compared with Embodiment 1, in this embodiment, during the shear force test, the first torsion seat 203 can be rotated by the torque test motor 201. When the first torsion seat 203 rotates, it will drive the teeth in contact with the contact plate 105 to rotate. During each rotation, a slight rotational offset is made to simulate the slight offset phenomenon that occurs during human biting, further increasing the diversity of strength testing and increasing data results, so that the test results are more in line with the use environment during human use.
[0040] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A dental shear bond strength testing device, comprising a support plate (100), characterized in that: A mounting plate (101) is fixedly connected to the support plate (100). An electric push rod (102) is fixedly connected to the outside of the mounting plate (101). A vertical plate (103) is fixedly connected to the piston rod end of the electric push rod (102). A thrust sensor (104) is installed on the outside of the vertical plate (103). A contact plate (105) is installed on the outside of the thrust sensor (104). A first clamping plate (106) and a second clamping plate (107) are installed on the support plate (100) via a moving assembly. A V-shaped portion is provided on the adjacent side of the first clamping plate (106) and the second clamping plate (107). A torque testing structure is installed on the outside of the V-shaped portion. A heat insulation cover (400) is fixedly connected to the support plate (100). A contact groove (111) is provided on the outside of the second clamping plate (107). Heating wires are installed inside the first clamping plate (106) and the second clamping plate (107).
2. The dental tooth bonding shear strength testing device according to claim 1, characterized in that: The torque testing structure includes an L-shaped positioning plate (200), which is fixedly connected to the outside of the heat insulation cover (400). A torque testing motor (201) is fixedly connected to the outside of the L-shaped positioning plate (200). A torque sensor (202) is installed on the output shaft of the torque testing motor (201). A first torsion seat (203) and a second torsion seat (204) are rotatably connected to the inner center of the first clamping plate (106) and the second clamping plate (107), respectively. A V-shaped portion with the same shape as the first clamping plate (106) and the second clamping plate (107) is opened on the side adjacent to the first torsion seat (203) and the second torsion seat (204). The contact groove (111) is located outside the second torsion seat (204).
3. The dental tooth bonding shear strength testing device according to claim 1, characterized in that: The moving component includes two micro drive motors (108), which are fixedly connected to one side of a support plate (100). The support plate (100) has two sliding grooves on its exterior, and a bidirectional lead screw (109) is rotatably connected inside the sliding grooves. The output shaft of the micro drive motor (108) passes through the outer wall of the support plate (100) and is rotatably connected to one end of the bidirectional lead screw (109). Two moving seats (110) are threadedly connected to the exterior of the two bidirectional lead screws (109). The four moving seats (110) are divided into two groups. The first moving seat (110) is fixedly connected to the bottom of the first clamping plate (106), and the other group of moving seats (110) is fixedly connected to the bottom of the second clamping plate (107).
4. The dental tooth bonding shear strength testing device according to claim 1, characterized in that: A laser transmitter (500) is fixedly connected to the outside of the upright plate (103), and a measuring scale plate (501) is fixedly connected to the support plate (100). A measuring scale is connected to the outside of the measuring scale plate (501).
5. A dental tooth bonding shear strength testing device according to claim 1, characterized in that: The heat insulation cover (400) is hinged to a transparent shielding door (401).
6. The dental tooth bonding shear strength testing device according to claim 1, characterized in that: The support plate (100) has two guide grooves (600), and the bottom of the upright plate (103) is integrally formed with a limiting block, which is slidably connected to the inside of the guide groove (600).
7. The dental tooth bonding shear strength testing device according to claim 1, characterized in that: The exterior of the first clamping plate (106) is covered with electrostatic heat-insulating stickers (300).