Bone cement diffusion performance testing system for bone cement nails
By designing a bone cement diffusion performance testing system for bone cement nails, and utilizing simulated bone standard blocks and a pressure machine for testing, the standardization problem of bone cement nail diffusion performance testing was solved, and the accuracy of osteoporosis simulation and the reliability of test results were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2026-03-03
AI Technical Summary
Existing technologies lack standardized testing methods for the diffusion performance of bone cement nails, and the errors are large and unstable when using fresh animal bones to simulate osteoporosis models, resulting in inaccurate test results.
A bone cement diffusion performance testing system for bone cement screws was designed, including a bone-like standard block, bone cement screws, bone cement injectors, and bone cement push rods. The bone-like standard block was fabricated by 3D printing, and the porosity was adjusted by combining the length and diameter of the rod to simulate different degrees of osteoporosis. The bone cement diffusion performance was tested using a press.
Standardized bone cement diffusion performance testing for bone cement nails has been achieved, which can accurately simulate different degrees of osteoporosis and improve the accuracy and consistency of test results.
Smart Images
Figure CN223966408U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bone implant testing technology, specifically to a bone cement diffusion performance testing system for bone cement nails. Background Technology
[0002] Currently, there are no relevant national or industry standards for studying the diffusion performance of bone cement in bone cement nails. Researching the diffusion performance of bone cement typically requires biomechanical experiments, i.e., purchasing bovine / sheep / pig bones, etc. However, fresh animal bones available on the market are not in a state of osteoporosis, requiring the creation of an osteoporosis model based on fresh bones. This process results in large and unstable errors in the degree of osteoporosis in the osteoporosis model, leading to inaccurate test results. Therefore, this invention provides a bone cement diffusion performance testing system for bone cement nails. Utility Model Content
[0003] The purpose of this invention is to provide a bone cement diffusion performance testing system for bone cement nails.
[0004] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows:
[0005] A bone cement diffusion performance testing system for bone cement screws includes: a bone-like standard block, a bone cement screw, a bone cement injector, and a bone cement push rod;
[0006] The bone-like standard block is composed of several body-centered cubic structures arranged in a three-dimensional matrix; the body-centered cubic structure is formed by the cross combination of several round rods;
[0007] The bone cement screw includes a screw implantation part and a screw tip; the screw implantation part can be implanted into the simulated bone standard block, and its interior is hollow with several bone cement discharge ports at the bottom end; the screw tip is located at the top of the screw implantation part and includes a groove for easy cooperation with the bone cement injector.
[0008] The bone cement injector includes an injector body and an injector tip; the injector body is hollow inside, and its bottom end mates with the screw tip; the injector tip is located on the top of the injector body and has a through hole to communicate with the interior of the injector body.
[0009] The bone cement plunger includes a plunger body and a plunger end; the plunger body can extend into the syringe body through a through hole on the syringe end; the plunger end is located at the top of the plunger body.
[0010] Based on the above scheme and as a preferred embodiment of the above scheme, the body-centered cubic structure is formed by combining four of the above circular rods to form a three-dimensional cross-shaped structure.
[0011] Based on the above scheme and as a preferred embodiment of the above scheme, a plurality of bone cement outlets are evenly distributed along the circumference of the screw implantation portion, and each bone cement outlet is located at a different height.
[0012] Based on the above scheme and as a preferred embodiment of the above scheme, the top of the screw end is provided with a mating part; the interior of the mating part is located around the groove, and its inner surface is provided with threads; the bone cement injector also includes an injection head; the top of the injection head is sleeved outside the bottom end of the injector body, the bottom end mates with the groove, and the middle outer wall is provided with threads to connect with the mating part in a threaded connection.
[0013] Based on the above scheme and as a preferred embodiment of the above scheme, the bone-like standard block is made by 3D printing.
[0014] The beneficial effects of this utility model are:
[0015] This invention provides a standard osteoporosis block, and based on this block, tests are conducted on the bone cement diffusion performance of bone cement screws, enabling a more standardized assessment of the bone cement diffusion performance. The porosity of the standard block can be adjusted by changing the length and diameter of the cylindrical rod to simulate different degrees of osteoporosis, thus allowing for the testing of the diffusion effect of bone cement within the bone gaps in osteoporotic conditions of varying degrees. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the assembly structure of the various components of this utility model.
[0017] Figure 2 This is a schematic diagram of the bone cement screw structure of this utility model.
[0018] Figure 3 This is a schematic diagram of the bone cement injector structure of this utility model.
[0019] Figure 4 This is a schematic diagram of the bone cement strut structure of this utility model.
[0020] Figure 5 This is a schematic diagram of the bone-like standard block structure of this utility model.
[0021] Figure 6 This is a schematic diagram of the body-centered cubic structure of this utility model.
[0022] In the diagram: 1. Bone-like standard block; 2. Bone cement screw; 21. Screw implantation part; 22. Screw tip; 23. Bone cement outlet; 24. Fitting part; 3. Bone cement syringe; 31. Syringe body; 32. Syringe tip; 33. Injection head; 4. Bone cement strut; 41. Bone cement push rod; 42. Push rod tip; 5. Body-centered cubic structure; 6. Round rod. Detailed Implementation
[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0024] like Figure 1 and Figure 5 As shown, a bone cement diffusion performance testing system for bone cement screws includes: a bone-like standard block 1, a bone cement screw 2, a bone cement injector 3, and a bone cement pusher 4.
[0025] like Figure 5 and Figure 6 As shown, the simulated bone standard block 1 is composed of several body-centered cubic structures 5 arranged in a three-dimensional matrix. The three-dimensional matrix arrangement is formed by the body-centered cubic structures 5 being uniformly arranged along three mutually perpendicular directions to form the cubic structure of the simulated bone standard block 1.
[0026] The body-centered cubic structure 5 is formed by the cross combination of several round rods 6. In this embodiment, the body-centered cubic structure 5 is formed by the combination of four round rods 6 to form a three-dimensional cross-shaped structure. Furthermore, the porosity of the bone-like standard block 1 can be adjusted by adjusting the length and diameter of the round rods 6 to simulate bones with different degrees of osteoporosis.
[0027] The bone-like standard block 1 is made by 3D printing.
[0028] like Figure 2 As shown, the bone cement screw 2 includes a screw implantation part 21 and a screw tip 22. The outer peripheral surface of the screw implantation part 21 is threaded, allowing it to be implanted into the bone-like standard block 1. The screw implantation part 21 is hollow inside, with several bone cement outlets 23 at its bottom end. The screw tip 22 is located at the top of the screw implantation part 21 and includes a groove for easy engagement with the bone cement injector 3. The groove communicates with the interior of the screw implantation part 21 to achieve bone cement injection. Preferably, the several bone cement outlets 23 are evenly distributed circumferentially along the screw implantation part 21, and each bone cement outlet 23 is located at a different height to ensure that the bone cement diffuses in all directions during injection.
[0029] Meanwhile, the top of the screw end 22 is provided with a mating part 24, the interior of which is located around the groove, and its inner surface is provided with internal threads.
[0030] like Figure 3 As shown, the bone cement injector 3 includes an injector body 31 and an injector tip 32. The injector body 31 is hollow inside, and its bottom end mates with the screw tip 22. The injector tip 32 is located on the top of the injector body 31 and has a through hole to communicate with the interior of the injector body 31. The bone cement injector 3 also includes an injection head 33, the top of which is sleeved outside the bottom end of the injector body 31, and the bottom end mates with a groove to achieve communication between the bone cement injector 3 and the bone cement screw 2. The outer wall of the middle part is provided with external threads to connect with the mating part 24.
[0031] like Figure 4 As shown, the bone cement pusher 4 includes a pusher body 41 and a pusher end 42. The pusher body 41 can be inserted into the syringe body 31 through a through hole on the syringe end 32. The pusher end 42 is located on the top of the pusher body 41 so as to push the pusher body 41.
[0032] Testing process: The simulated bone standard block 1 was 3D printed. Holes were drilled in the simulated bone standard block 1 according to the bone cement screw 2, and then the bone cement screw 2 was implanted into the simulated bone standard block 1. The bone cement injector 3 was connected to the top of the bone cement screw 2 and then fixed to an external fixation device to maintain stability. The bone cement push rod 4 was fitted onto the bone cement injector 3 and its top was connected to the press. The test system was then completed.
[0033] The press drives the bone cement pusher 4 downward to inject bone cement into the simulated bone standard block 1. At the same time, the press records the pressure and displacement values in real time to obtain the test force-displacement curve. This can quantify the force of bone cement diffusion in the bone cement screw 2. In addition, the simulated bone standard block 1 can be cut open to see the diffusion. The diffusion can be quantified by counting the grids of bone cement diffusion, or by taking an X-ray to visually see and quantify the diffusion.
[0034] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.
Claims
1. A bone cement diffusion performance testing system for bone cement nails, characterized in that, include: Bone-like standard block (1), bone cement screw (2), bone cement syringe (3) and bone cement push rod (4); The simulated bone standard block (1) is composed of several body-centered cubic structures (5) arranged in a three-dimensional matrix; the body-centered cubic structure (5) is formed by the cross combination of several round rods (6); The bone cement screw (2) includes a screw implantation part (21) and a screw tip (22); the screw implantation part (21) can be implanted into the simulated bone standard block (1), and its interior is hollow with several bone cement discharge ports (23) at the bottom end; the screw tip (22) is located at the top of the screw implantation part (21) and includes a groove that facilitates cooperation with the bone cement injector (3); The bone cement syringe (3) includes a syringe body (31) and a syringe tip (32); the syringe body (31) is hollow inside, and its bottom end is engaged with the screw tip (22); the syringe tip (32) is located on the top of the syringe body (31) and has a through hole to communicate with the inside of the syringe body (31). The bone cement push rod (4) includes a push rod body (41) and a push rod end (42); the push rod body (41) can extend into the syringe body (31) through a through hole on the syringe end (32); the push rod end (42) is located on the top of the push rod body (41).
2. The bone cement diffusion performance testing system for bone cement nails according to claim 1, characterized in that, The body-centered cubic structure (5) is formed by combining four of the circular rods (6) to form a three-dimensional cross-shaped structure.
3. The bone cement diffusion performance testing system for bone cement nails according to claim 1, characterized in that, Several bone cement outlets (23) are evenly distributed around the screw implantation portion (21), and each bone cement outlet (23) is located at a different height.
4. The bone cement diffusion performance testing system for bone cement nails according to claim 1, characterized in that, The screw end (22) is provided with a mating part (24) at the top; the mating part (24) is located around the groove, and its inner surface is provided with threads; the bone cement syringe (3) also includes an injection head (33); the top of the injection head (33) is sleeved on the outside of the bottom end of the syringe body (31), the bottom end is mated with the groove, and the middle outer wall is provided with threads to be threadedly connected with the mating part (24).
5. The bone cement diffusion performance testing system for bone cement nails according to claim 1, characterized in that, The bone-like standard block (1) is made by 3D printing.