A femoral condyle bone cement connection reliability test device

Abstract

The utility model discloses a femoral condyle bone cement connection reliability test device, include: solidification bucket, femoral condyle frock is provided femoral condyle on femoral condyle frock, and the gap between femoral condyle and femoral condyle frock is filled with bone cement, hold condyle head, including two clamping jaws, and two clamping jaws cooperate with each other and clamp femoral condyle, adjusting mechanism is used for adjusting the interval between two clamping jaws, and loading connector is used for being connected with load loading equipment. The utility model discloses the interval between two clamping jaws is adjusted with adjusting mechanism, can lock to different femoral condyle size, and femoral condyle is fixed through hold condyle head, and this structure can select the product center position fixedly more accurately, makes its experimental value more accurate, and this structure can be reused, and does not cause the damage to experimental product, can continue using femoral condyle to carry out other test detection after experiment, thereby saving material cost.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a test device for the reliability of femoral condyle cement connection. Background Technology

[0002] Knee joint disorders are a common orthopedic condition. Current technologies offer various treatments for knee joint problems, and with technological advancements, artificial knee replacements have emerged as a treatment option. Artificial knee replacement is a procedure that uses an artificial knee joint system to replace the body's original knee joint system. Using an artificial knee joint greatly helps alleviate the pain and discomfort caused by knee joint disorders and can, to some extent, replace the function of the original knee joint. Therefore, it is gradually becoming a popular treatment method.

[0003] In total knee arthroplasty, the scientific design of the artificial knee joint system is crucial to its ability to replace the original knee joint system. In knee joint-related experiments, a femoral condyle fixture is typically fabricated based on the shape of the femoral condyle, then fixed to the femoral condyle for testing. In existing technologies, when conducting mechanical performance tests on the femoral condyle of knee prostheses, a post needs to be welded to the distal end of the femoral condyle to connect to the fixture, fixing the condyle before testing. However, the welded femoral condyle cannot be used for further experiments, resulting in material waste. Furthermore, since the femoral condyle material is typically cobalt-chromium-molybdenum, the same material used during welding should be employed, increasing experimental costs. Additionally, the welding process cannot accurately ensure the post is centered on the femoral condyle, easily leading to inaccurate test results later. Utility Model Content

[0004] The purpose of this invention is to provide a femoral condyle cemented connection reliability testing device to solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a femoral condyle cemented connection reliability testing device, comprising: Curing bucket; A femoral condyle fixture is placed inside a curing tank. The femoral condyle is placed on the femoral condyle fixture, and the gap between the femoral condyle and the femoral condyle fixture is filled with bone cement. The condylar head is held by two clamps that work together to hold the femoral condyle. An adjustment mechanism is included to adjust the distance between the two grippers to accommodate different sizes of femoral condyles; and The loading connector is used to connect to the load loading device, which applies tension to the condyle holder through the loading connector until the femoral condyle is completely separated from the femoral condyle tooling.

[0006] As an optional implementation of the above technical solution, the adjustment mechanism includes an adjustment plate, the middle of which is connected to a loading connector. Two grippers are symmetrically arranged on the adjustment plate and can move along the adjustment plate to clamp femoral condyles of different sizes.

[0007] As an optional embodiment of the above technical solution, the adjusting plate is provided with a plurality of adjusting holes symmetrically at both ends, and the adjusting holes are equipped with locking components, which are used to fix the grippers on the adjusting plate.

[0008] As an optional embodiment of the above technical solution, the locking component includes a locking bolt and a locking nut, wherein the locking bolt passes through the clamp and the adjustment hole and is connected to the locking nut.

[0009] As an optional implementation of the above technical solution, the loading connector includes a loading connecting rod, one end of which is connected to the middle of the adjusting plate.

[0010] As an optional implementation of the above technical solution, the adjustment mechanism includes an adjustment arm, a lifting nut, and a two-link assembly. The two ends of the adjustment arm are respectively connected to the two-link assembly. The lifting nut is threadedly connected to one end of the loading connector. One end of the link assembly is connected to the lifting nut, and the other end of the link assembly is connected to the gripper. When the loading connector rotates, it can drive the lifting nut to move along the loading connector, so that the lifting nut drives the gripper to open and close through the link assembly.

[0011] As an optional implementation of the above technical solution, the linkage assembly includes a fixed arm, a connecting arm, and a swing arm. One end of the fixed arm is fixedly connected to a lifting nut. Both ends of the connecting arm are rotatably connected to the fixed arm and the swing arm, respectively. The middle part of the swing arm is rotatably connected to an adjusting arm. The end of the swing arm away from the connecting arm is connected to a gripper.

[0012] As an optional implementation of the above technical solution, a guide sleeve is provided in the middle of the adjusting arm, and the guide sleeve is rotatably engaged with one end of the loading connector.

[0013] As an optional implementation of the above technical solution, the loading connector includes a loading screw, and the loading screw is provided with a handle.

[0014] As an optional implementation of the above technical solution, the femoral condyle tooling is manufactured by 3D printing.

[0015] The beneficial effects of this utility model are as follows: This invention utilizes an adjustment mechanism to adjust the distance between two grippers, allowing for locking to different femoral condyle sizes. The femoral condyle is fixed by the condyle holding head. This structure enables more accurate selection of the product's center position for fixation, resulting in more accurate experimental values. Furthermore, this structure is reusable and does not damage the experimental product. After the experiment, the femoral condyle can be used for other tests, thereby saving material costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the femoral condyle cement connection reliability test device in one embodiment of this utility model; Figure 2 This is a schematic diagram of the structure of the femoral condyle cement connection reliability test device in another embodiment of this utility model.

[0017] In the diagram: 1-Curing barrel; 2-Femoral condyle fixture; 3-Femoral condyle; 4-Clamping claw; 5-Adjusting plate; 6-Adjusting hole; 7-Locking component; 8-Loading connecting rod; 9-Adjusting arm; 10-Lifting nut; 11-Fixed arm; 12-Connecting arm; 13-Swing arm; 14-Guide sleeve; 15-Loading screw; 16-Handle lever. Detailed Implementation

[0018] like Figure 1 As shown, this embodiment provides a femoral condyle 3 bone cement connection reliability testing device, including a curing tank 1, a femoral condyle tool 2, a condyle holder, an adjustment mechanism, and a loading connector. The curing tank 1 is used to hold the femoral condyle tool 2 and collect excess bone cement.

[0019] The femoral condyle fixture 2 is fixed inside the curing tank 1. The femoral condyle 3 is mounted on the femoral condyle fixture 2, and the gap between the femoral condyle 3 and the femoral condyle fixture 2 is filled with bone cement. The femoral condyle fixture 2 is manufactured according to the appearance shape of the femoral condyle 3. Specifically, the femoral condyle fixture 2 is 3D printed to match different shapes of femoral condyles 3, achieving individualized customization.

[0020] The condyle holder includes two grippers 4, which cooperate to hold the femoral condyle 3 so as to move the femoral condyle 3.

[0021] The adjustment mechanism is used to adjust the distance between the two grippers 4 to accommodate different sizes of femoral condyles 3. Since femoral condyles 3 come in different models, the adjustment mechanism is used to adjust the distance between the two grippers 4 to accommodate different models of femoral condyles 3. During testing, this invention selects the corresponding femoral condyle fixture 2 according to the model of the femoral condyle 3, and simultaneously positions the condyle holder head appropriately to fix the experimental femoral condyle 3 in the center.

[0022] The loading connector is used to connect to the load loading device. The load loading device applies tension to the condyle holder head through the loading connector. The condyle holder head moves the femoral condyle 3 until the femoral condyle 3 separates from the femoral condyle fixture 2. The displacement-load curve is recorded to complete the test. By analyzing the reliability of the connection between the femoral condyle 3 and the bone cement, it is possible to use bone cement to connect the femoral condyle fixture 2 and the femoral condyle 3, replacing the method of welding the column to connect the femoral condyle fixture 2.

[0023] It should be noted that there are multiple structural implementations of the regulating mechanism. Two structural implementations of the regulating mechanism are listed below.

[0024] like Figure 1 As shown, the first structure of the adjustment mechanism includes an adjustment plate 5, the middle of which is connected to a loading connector. Two grippers 4 are symmetrically arranged on the adjustment plate 5 and can move along the adjustment plate 5 to clamp femoral condyles 3 of different sizes. Specifically, multiple adjustment holes 6 are symmetrically provided at both ends of the adjustment plate 5. Locking elements 7 are provided at the adjustment holes 6 to fix the grippers 4 to the adjustment plate 5. The locking elements 7 include locking bolts and locking nuts. The locking bolts pass through the grippers 4 and the adjustment holes 6 and are connected to the locking nuts. Preferably, eight adjustment holes 6 are provided at both ends of the adjustment plate 5. Selecting one adjustment hole 6 to fix the grippers 4 facilitates testing of femoral condyles 3 of different sizes.

[0025] The loading connector includes a loading connecting rod 8, one end of which is connected to the middle of the adjusting plate 5. The top end of the loading connecting rod 8 is connected to a load loading device, and the bottom end of the loading connecting rod 8 is fixedly connected to the adjusting plate 5. The load loading device applies tension to the adjusting plate 5 and the condyle holder through the loading connecting rod 8. The condyle holder moves the femoral condyle 3 until the femoral condyle 3 is completely separated from the femoral condyle fixture 2.

[0026] like Figure 2 As shown, the second structure of the adjustment mechanism includes an adjustment arm 9, a lifting nut 10, and a two-link assembly. The two ends of the adjustment arm 9 are respectively connected to the two-link assembly. The lifting nut 10 is threadedly connected to one end of the loading connector. One end of the link assembly is connected to the lifting nut 10, and the other end of the link assembly is connected to the gripper 4. When the loading connector rotates, it can drive the lifting nut 10 to move along the loading connector, so that the lifting nut 10 drives the gripper 4 to open and close through the link assembly, so as to test different specifications of femoral condyles 3.

[0027] The linkage assembly includes a fixed arm 11, a connecting arm 12, and a swing arm 13. One end of the fixed arm 11 is fixedly connected to the lifting nut 10. Both ends of the connecting arm 12 are rotatably connected to the fixed arm 11 and the swing arm 13, respectively. The middle part of the swing arm 13 is rotatably connected to the adjusting arm 9, and the end of the swing arm 13 away from the connecting arm 12 is connected to the gripper 4. Preferably, the middle part of the adjusting arm 9 is provided with a guide sleeve 14, which is rotatably engaged with one end of the loading connector.

[0028] The loading connector includes a loading screw 15, which has a handle 16. The loading screw 15 is threadedly connected to the lifting nut 10. Before the test, the loading screw 15 is rotated by the handle 16 to drive the two grippers 4 to open and close, thereby clamping the femoral condyle 3.

[0029] In use, the femoral condyle 3 and the femoral condyle fixture 2 are fixed together with bone cement. At the same time, the femoral condyle fixture 2 is fixed in the curing barrel 1. After the bone cement has completely cured, the test sample is installed in the load loading device. According to the specifications of the femoral condyle 3, the adjustment hole 6 of the adjustment plate 5 is selected and the clamp 4 is fixed. The load loading device applies a vertically upward force to perform a static pull-out test until the femoral condyle 3 and the femoral condyle fixture 2 are separated. The displacement-load curve is recorded to complete the test.

[0030] Due to the variety of femoral condyle 3 product specifications, the adjustment plate 5 designed in this paper has 8 adjustment holes 6 at both ends with a center distance of 4.5mm. It can be locked for different femoral condyle 3 sizes. The femoral condyle 3 is fixed by holding the condyle head. This structure can more accurately select the center position of the product for fixation, making the experimental values ​​more accurate. In addition, this structure can be reused without damaging the experimental product. After the experiment, the femoral condyle 3 can be used for other tests, thereby saving material costs.

[0031] Compared with the prior art, the present invention has the following advantages: 1. This utility model allows for the adjustment of the distance between the two grippers 4 via an adjustment mechanism, enabling testing of femoral condyles 3 of different specifications.

[0032] 2. The condyle holding head of this utility model has two grippers 4, which can ensure that the femoral condyle 3 is fixed in the central position.

[0033] 3. This utility model is reusable and will not damage the femoral condyle 3 due to the connection of the condyle head.

[0034] 4. The femoral condyle tooling 2 is made of resin 3D printing and can be designed according to different femoral condyle 3 structures to achieve individualized customization.

[0035] In this description of the utility model, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. They can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model. Furthermore, the specific features and structures described in the embodiments are included in at least one implementation method. Those skilled in the art can combine features from different implementation methods without contradiction. The scope of protection of this utility model is not limited to the specific implementation methods described above. Based on the basic technical concept of this utility model, implementation methods that can be conceived by those skilled in the art without creative effort are all within the scope of protection of this utility model.

Claims

1. A femoral condyle cemented joint reliability testing device, characterized by, include: Curing container (1); Femoral condyle fixture (2) is set inside curing bucket (1), and femoral condyle (3) is set on femoral condyle fixture (2). The gap between femoral condyle (3) and femoral condyle fixture (2) is filled with bone cement. The condyle is held by two clamps (4), which work together to hold the femoral condyle (3). An adjustment mechanism for adjusting the distance between the two grippers (4) to accommodate different sizes of femoral condyles (3); and The loading connector is used to connect to the load loading device, which applies tension to the condyle holder through the loading connector until the femoral condyle (3) is separated from the femoral condyle tool (2).

2. The femoral condyle cement-bone junction reliability test device according to claim 1, wherein The adjustment mechanism includes an adjustment plate (5), the middle part of which is connected to the loading connector. Two grippers (4) are symmetrically arranged on the adjustment plate (5), and the two grippers (4) can move along the adjustment plate (5) to clamp femoral condyles (3) of different sizes.

3. The femoral condyle cement-bone junction reliability test device according to claim 2, wherein The adjusting plate (5) has multiple adjusting holes (6) symmetrically arranged at both ends. Each adjusting hole (6) is equipped with a locking member (7), which is used to fix the gripper (4) on the adjusting plate (5).

4. The femoral condyle cement-bone junction reliability test device according to claim 3, wherein The locking component (7) includes a locking bolt and a locking nut. The locking bolt passes through the clamp (4) and the adjusting hole (6) and is connected to the locking nut.

5. The femoral condyle cemented bone connection reliability test device of claim 2, wherein, The loading connector includes a loading connecting rod (8), one end of which is connected to the middle of the adjusting plate (5).

6. The femoral condyle cemented bone connection reliability test device of claim 1, wherein The adjustment mechanism includes an adjustment arm (9), a lifting nut (10), and a two-link assembly. The two ends of the adjustment arm (9) are connected to the two-link assembly respectively. The lifting nut (10) is threaded to one end of the loading connector. One end of the link assembly is connected to the lifting nut (10), and the other end of the link assembly is connected to the gripper (4). When the loading connector rotates, it can drive the lifting nut (10) to move along the loading connector, so that the lifting nut (10) drives the gripper (4) to open and close through the link assembly.

7. The femoral condyle cemented bone connection reliability test device of claim 6, wherein, The linkage assembly includes a fixed arm (11), a connecting arm (12), and a swing arm (13). One end of the fixed arm (11) is fixedly connected to the lifting nut (10). The two ends of the connecting arm (12) are rotatably connected to the fixed arm (11) and the swing arm (13) respectively. The middle part of the swing arm (13) is rotatably connected to the adjusting arm (9). The end of the swing arm (13) away from the connecting arm (12) is connected to the gripper (4).

8. The femoral condyle cemented bone connection reliability test device of claim 6, wherein, The middle part of the adjusting arm (9) is provided with a guide sleeve (14), which is rotatably engaged with one end of the loading connector.

9. The femoral condyle cemented bone connection reliability test device of claim 6, wherein, The loading connector includes a loading screw (15) and a handle (16) on the loading screw (15).

10. The femoral condyle cemented bone connection reliability test device of claim 1, wherein, The femoral condyle tooling (2) is 3D printed.

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