A bone cement injector and method of use

Abstract

The application discloses a bone cement injector and a use method. The bone cement injector comprises a configuration module, the configuration module is used for configuring bone cement and performing injection, the configuration module is connected with a lead-in module and used for injecting the configured bone cement into a cavity of the lead-in module, the configuration module comprises a stirring cavity, an injection module and a stirring module, the injection module and the stirring module are integrally arranged on the stirring cavity, first and second auxiliary cavities which are relatively sealed and isolated are arranged at the front and back of the stirring cavity respectively, the injection module comprises a first transmission gear, a screw rod and an injection piston, and the stirring module comprises a second transmission gear, a stirring rod and a stirring paddle. The application integrates steps such as assembly preparation, stirring of bone cement and target injection of bone cement, and is convenient to operate.

Description

Technical Field

[0001] This invention relates to the field of orthopedic medical devices, specifically to a bone cement injector and its method of use. Background Technology

[0002] Bone cement is a medical bone filler, originally used for joint replacement. Injected into the bone or medullary cavity in a liquid state, bone cement rapidly solidifies, enhancing local bone strength and stabilizing prostheses or implants. Traditional injectors consist of a syringe gun, a pressure controller, an air cushion, a piston, and a needle. In use, the doctor first loads the bone cement into the syringe gun, then inserts the needle into the affected bone area, controlling the pressure as needed to slowly inject the bone cement into the target area. Bone cement injectors are convenient, simple to operate, and allow for precise injection. They also protect the safety of both doctors and patients, preventing complications caused by bone cement spillage.

[0003] Currently, traditional bone cement requires strict solid-liquid ratio mixing during preparation. Material loss or uneven mixing significantly alters the properties of the bone cement, reducing its therapeutic efficacy. Furthermore, bone cement typically has a very short setting time, necessitating efficient and rapid mixing. In addition, minimizing the number of transfers and exposure time after opening the container not only reduces moisture loss or evaporation but also facilitates clinical injection therapy. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings in the prior art and to provide a bone cement injector with a reasonable structural design and a method of use.

[0005] The technical solution adopted by this invention to solve the above problems is: a bone cement injector, comprising a configuration module for configuring and injecting bone cement, an injection module for introducing the cement into the medullary cavity for filling injection, and a configuration module connected to an injection module cavity for injecting the configured bone cement into the injection module cavity. The configuration module includes a mixing chamber, an injection module, and a mixing module, which are integrated on the mixing chamber. The mixing chamber has a first and a second auxiliary cavity, respectively, which are relatively sealed and isolated. The injection module includes a first drive gear, a lead screw, and an injection piston. The mixing module includes a second drive gear, a mixing rod, and a mixing paddle. The injection piston is threaded and adapted to slide in a sealed manner against the wall of the mixing chamber. The first drive gear is rotatably configured. In the first auxiliary cavity, the end of the lead screw is provided with an internal hexagonal hole, the first transmission tooth is provided with a ratchet, the end of the lead screw is provided with a pawl, the second transmission tooth is rotatably disposed in the first auxiliary cavity and meshes with the first transmission tooth, the second transmission tooth is fixed with a stirring rod extending into the stirring cavity, the stirring blade of the stirring rod is disposed adjacent to the second auxiliary cavity, the configuration module is provided with a drive motor connected to the end of the stirring rod via a coupling, the stirring cavity extends to the second auxiliary cavity via a guide tube and is connected to the injection cavity introduced by the injection module, the guide tube is provided with a valve nozzle and its control handle is disposed outside the second auxiliary cavity, the configuration module also includes an injection connector, the injection connector is provided with multiple injection ports, the injection ports are adapted to be sealed with end caps, and the end caps are connected to the container of bone cement raw materials via threaded adaptation.

[0006] Furthermore, a stirring paddle is provided near the second auxiliary cavity of the lead screw component.

[0007] Furthermore, the mixing chamber is also connected to a flushing port.

[0008] Furthermore: the configuration module is adapted to be installed in the grip component, which includes an arc-shaped handle and a grip, and the grip is fixed to the housing of the drive component by a snap-fit.

[0009] Furthermore, the bone cement injector also includes an injection module, which includes an injection fitting. The injection fitting includes a sleeve, an outer tube, and an inner tube. The inner tube is disposed within the inner cavity of the outer tube and forms a gap cavity. The outer tube has a plurality of guide grooves axially arranged on its wall surface. The guide grooves have a plurality of openings communicating with the gap cavity. The head end of the outer tube has a return channel communicating with the inner tube cavity. The sleeve is adapted to be disposed on the wall surface of the outer tube. The inner side of the sleeve has a sliding guide block adapted to the guide grooves. The sliding guide block has a guide hole. The inner end of the guide hole is adapted to the position of the opening. The outer end of the gap cavity is connected to a first connecting tube, and the outer end of the inner tube cavity is connected to a second connecting tube.

[0010] Furthermore, radial grooves are interlaced on the inner wall of the sleeve and the outer wall of the outer tube, and several sets of radial grooves are provided extending from the front end to the rear side.

[0011] Furthermore, the outer end wall of the sleeve is provided with threads.

[0012] Furthermore: the first connecting tube is connected to the syringe, the second connecting tube is connected to the honeycomb air filter module, the honeycomb air filter module is 3D printed from transparent material and is connected to the recycling chamber, and the wall surface of the honeycomb air filter module is provided with scale lines.

[0013] Furthermore: the drive motor is fixed to the gripping component, and the end of the gripping component is connected and fixed to the second sub-cavity through a pluggable fastener.

[0014] A method of using the above-mentioned bone cement injector includes: Cleaning function usage: Without installing the cannula, after the medullary reaming is completed, insert the outer and inner tubes into the bone cavity. At this time, the first connecting tube is connected to the flushing fluid equipment for positive pressure flushing. Due to the presence of the guide groove, there is a reserved flushing space. Due to the positive pressure, the flushing fluid is sprayed from the opening, creating a flushing effect. Bone debris and tissues during the drilling process can be flushed to the head end with the guide groove and enter the cavity of the inner tube through the return channel. The inner tube is connected to the recovery container to recover the flushing liquid. Injection filling method: The cannula and inner tube are fitted together, the first connecting tube is connected to the syringe, and the second connecting tube is connected to the honeycomb air filter module. The honeycomb air filter module is filled with simulated bone pores and connected to the recovery cavity. At this time, the syringe introduces bone cement into the gap cavity, exits through the opening and fills several guide grooves, and contacts the cavity wall through the guide grooves to penetrate into the bone and achieve filling. Bone cement preparation and injection method: First, connect the bone cement raw material adapter to the injection port. At this time, the container of bone cement raw material is upright. Use an Allen wrench to turn the screw component, so that the injection piston returns to the rear end. At the same time, negative pressure is created in the mixing chamber. Then, invert the container of bone cement raw material to allow the bone cement raw material to enter the mixing chamber. The stirring rod is connected to the drive motor. The motor rotates forward, and the stirring rod rotates. The second transmission gear drives the first transmission gear to rotate. Because the second transmission gear rotates in reverse, the pawl cannot engage with the ratchet. At this time, the screw component does not rotate, and the injection piston does not move axially. During the stirring process, the mixing chamber is in a negative pressure state. When injection is required, gradually open the valve to return the mixing chamber to normal pressure. Then, the drive motor rotates in reverse. The ratchet engages with the ratchet teeth. The first transmission gear drives the screw component to rotate, which pushes the injection piston axially to the front end, allowing the stirred bone cement to be injected into the guide tube and into the gap cavity for injection.

[0015] Compared with the prior art, the present invention has the following advantages and effects: (1) The present invention integrates the configuration module and the injection module into one, realizing the integration of functions such as mixing, grouting and injection of bone cement, simplifying the operation process and improving work efficiency.

[0016] (2) The present invention adopts structures such as guide groove, opening, guide hole, and return channel to realize the return control when bone cement flows through, avoid the overflow of bone cement, and ensure the safety of the injection process.

[0017] (3) Stirring is carried out under negative pressure, which effectively improves the quality of bone cement and reduces the generation of internal air bubbles. At the same time, the stirring and injection are driven by the same drive, making the structure compact and easy to operate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a bone cement injector according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the injection module according to an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the connection structure between the inner tube and the outer tube in an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the configuration module in an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the injection module and the stirring module according to an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the valve body arrangement in an embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of the container connection of the bone cement raw material according to an embodiment of the present invention.

[0025] Figure 8 This is a schematic diagram of the connection of the gripping component according to an embodiment of the present invention.

[0026] Figure 9 This is a schematic diagram of the structure of the gripping component according to an embodiment of the present invention.

[0027] Figure 10 This is a schematic diagram of the structure of the gripping component according to an embodiment of the present invention.

[0028] Figure 11 This is a schematic diagram of the airbag configuration in an embodiment of the present invention.

[0029] Figure Numbers: Injection Module 1, Injection Fitting 11, Sleeve 111, Sliding Guide Block 1111, Guide Hole 1112, Outer Tube 112, Guide Groove 1121, Opening 1122, Return Channel 1123, Inner Tube 113, Inner Tube Cavity 1131, Radial Groove 114, Gap Cavity 115, Connecting Thread 116, Second Connecting Pipe 117, Honeycomb Air Filter Module 13, Configuration Module 2, Stirring Chamber 21, Injection Module 22, Stirring Module 23 First auxiliary cavity 211, second auxiliary cavity 212, first transmission gear 221, lead screw 222, injection piston 223, internal hexagonal hole 224, ratchet 225, pawl 226, stirring rod 231, stirring paddle 232, second transmission gear 233, coupling 234, guide pipe 241, valve 242, injection connector 243, injection port 245, container 30 for bone cement raw materials, gripping component 4, handle 41, grip 42, buckle 43. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0031] Example 1:

[0032] See Figure 1 - Figure 11This embodiment relates to a bone cement injector including a configuration module 2. The configuration module 2 is connected to the cavity of the injection module 1 for injecting the configured bone cement into the cavity of the injection module 1. The configuration module 2 includes a mixing chamber 21, an injection module 22, and a mixing module 23. The injection module 22 and the mixing module 23 are integrated on the mixing chamber 21. The mixing chamber 21 has a first auxiliary cavity 211 and a second auxiliary cavity 212 respectively arranged in a relatively sealed and isolated manner. The injection module 22 includes a first transmission gear 221, a lead screw 222, and an injection piston 223. The mixing module 23 includes a second transmission gear 233, a mixing rod 231, and a mixing paddle 232. The injection piston 223 is threaded and adapted to slide in a sealed manner on the wall of the mixing chamber 21 (axial sliding but not rotatable). The first transmission gear 221 is rotatably disposed on the first auxiliary cavity 211. The lead screw 222... The end of the stirring rod 221 is provided with an internal hexagonal hole 224 (the stirring rod 231 can also be provided). The first transmission tooth 221 is provided with a ratchet 225. The end of the lead screw 222 is provided with a pawl 226. The second transmission tooth 233 is rotatably disposed in the first auxiliary cavity 211 and meshes with the first transmission tooth 221. The second transmission tooth 233 is fixed with the stirring rod 231 extending into the stirring cavity 21. The stirring paddle 232 of the stirring rod 231 is disposed adjacent to the second auxiliary cavity 212. The configuration module 2 is provided with a drive motor and is connected to the end of the stirring rod 231 (the end of the lead screw 222 can also be provided) through a coupling 234 (e.g., a claw-type elastic coupling 234). The stirring cavity 21 extends to the second auxiliary cavity 212 through a guide tube 241 and is connected to the injection cavity (first connecting tube) of the inlet module. The guide tube 241 is provided with a valve nozzle 242 and its control handle is disposed outside the second auxiliary cavity 212.

[0033] The configuration module 2 also includes an injection connector 243, which is provided with multiple injection ports 245. The injection ports 245 are adapted to be sealed with end caps, and the end caps are connected to the container 30 of the bone cement raw material by threaded connection.

[0034] In the specific injection procedure, the bone cement raw material is first connected to the injection port 245 (at this time, the container 30 of the bone cement raw material is upright). An Allen wrench is used to rotate the lead screw 222 (or a drive motor is connected to the lead screw 222 via a coupling 234, i.e., the lead screw 222 and the stirring rod 231 are arranged radially symmetrically, allowing the drive motor to be inverted and connected to the lead screw 222 and the stirring rod 231 respectively), causing the injection piston 223 to reset and creating negative pressure in the stirring chamber 21. At this point, the container 30 of the bone cement raw material is inverted, allowing the bone cement raw material to enter. The mixture enters the stirring chamber 21. At this time, the stirring rod 231 is connected to the drive motor, and the motor rotates forward. The stirring rod 231 rotates, causing the interior to rotate at high speed. The second transmission gear 233 drives the first transmission gear 221 to rotate. Because the second transmission gear 233 rotates in reverse, the pawl 226 cannot engage with the ratchet. Therefore, the lead screw 222 does not rotate, and the injection piston 223 does not move. During the stirring process, the stirring chamber 21 is under negative pressure. Negative pressure degassing utilizes the negative pressure to reduce the saturation of gas in the liquid or mixture, thereby causing bubbles to escape from the liquid or mixture. During the mixing process, the formation of air bubbles inside the bone cement liquid is reduced, improving the quality of the bone cement. When injection is required, valve 242 is gradually opened to return the mixing chamber 21 to normal pressure. At this time, the drive motor reverses (at low speed), and the ratchet engages with the ratchet tooth 225. The first transmission tooth 221 drives the lead screw 222 to rotate, causing the piston to slide axially forward. This allows the mixed bone cement to be injected into the guide tube 241 and into the gap cavity for injection. During injection, the injection rate can be adjusted by regulating the rotation of the drive motor. In this structure, the lead screw 222 is adjacent to the first... The second chamber 212 is equipped with a stirring paddle 232, which enables dual-axis stirring, resulting in higher efficiency and better stirring effect. At the same time, stirring is carried out under negative pressure, which reduces the generation of air bubbles inside the bone cement. This has a positive effect on improving bone cement treatment and increasing the strength of bone cement. This product has a compact structure and uses a set of drive structures to achieve multiple functions, as shown in the figure. The rear end of the configuration module 2 is adapted and installed in the grip component 4. The grip component 4 includes an arc-shaped handle 41 and a grip 42. The grip 42 is installed and fixed to the housing of the drive component by a buckle 43, making the grip more convenient and stable.

[0035] In this embodiment, the drive motor is fixed to the gripping component 4. The end of the gripping component 4 is connected and fixed to the second sub-cavity 212 by a detachable buckle, which is convenient for easy disassembly and assembly. The handle 41 is a component for fixing to the operator's wrist, which can keep the operator's wrist at a comfortable angle. The grip 42 is installed and fixed to the housing of the drive component by a buckle 43. The buckle 43 can make the grip 42 and the gripping component 4 tightly connected and can be easily disassembled or replaced. The grip 42 needs to be held and supported by hand, which makes the grip more stable during the injection of bone cement and ensures a good injection effect.

[0036] Example 2:

[0037] See Figure 1 - Figure 10 This embodiment discloses a bone cement injector, including an injection module 1. The injection module 1 includes an injection tube 11, which includes a sleeve 111, an outer tube 112, and an inner tube 113. The inner tube 113 is disposed within the inner cavity of the outer tube 112, forming a gap cavity 115. The outer tube 112 has a plurality of guide grooves 1121 axially arranged on its wall surface. The guide grooves 1121 are provided with a plurality of openings 1122 communicating with the gap cavity 115. The head end is provided with a return channel 1123 communicating with the inner tube cavity 1131. The sleeve 111 is adapted to be installed on the wall of the outer tube 112. The inner side of the sleeve 111 is provided with a sliding guide block 1111 adapted to the guide groove 1121. The sliding guide block 1111 is provided with a guide hole 1112. The inner end of the guide hole 1112 is adapted to the position of the opening 1122. The outer end of the gap cavity is connected to the first connecting pipe. The outer end of the cavity of the inner tube 113 is connected to the second connecting pipe 117.

[0038] This embodiment relates to a bone cement injector used in intramedullary fixation of intertrochanteric fractures of the femur combined with bone cement filling, as described below: During bone cement injection, it is crucial to maintain a clean bone bed surface. Otherwise, the bone cement cannot effectively fill the intertrabecular spaces. After medullary reaming, residual bone debris, blood, and fat particles on the bone bed surface hinder the cement's entry into the intertrabecular spaces and severely impact its strength. Therefore, a recommended approach is to flush and clean the medullary cavity before injection. For example, a flushing solution can be started with Ringer's solution containing 3%–5% hydrogen peroxide to remove fat droplets. Hemostatic agents such as thrombin can also be added to control bleeding within the medullary cavity during flushing. Additionally, 1:1000 adrenaline-soaked gauze packing and controlled hypotension can also control medullary cavity bleeding, ensuring the medullary cavity is as clean and dry as possible before bone cement injection. Specifically: Bone cavity cleaning: (1) Cleaning before the main nail of the intramedullary nail is inserted: without the sleeve 111, after the medullary canal is reamed, the outer tube 112 and the inner tube 113 are inserted into the bone cavity. At this time, the first connecting tube 116 is connected to the flushing fluid equipment and positive pressure flushing is performed. Due to the presence of the guide groove 1121, there is a large flushing space. Due to the positive pressure, the flushing fluid is sprayed a certain distance after it comes out of the opening 1122, forming a flushing effect. Bone chips and tissues during the drilling process can be flushed to the head end with the guide groove 1121 and enter the cavity of the inner tube 113 through the return channel 1123. The inner tube 113 is connected to the recovery container to recover the flushing liquid (the recovery container can have a negative pressure suction function to achieve the drainage effect). (2) Cleaning before inserting the head screw: Before inserting the head screw guide pin, without installing the sleeve 111, insert the outer tube 112 and the inner tube 113 into the bone cavity. At this time, the first connecting tube 116 is connected to the flushing fluid equipment for positive pressure flushing. Due to the presence of the guide groove 1121, there is a large flushing space. Due to the positive pressure, the flushing fluid is sprayed a certain distance after exiting the opening 1122, forming a flushing effect. Bone fragments and tissues during the drilling process can be flushed to the head end with the guide groove 1121 and enter the cavity of the inner tube 113 through the return channel 1123. The inner tube 113 is connected to the recovery container to recover the flushing liquid.

[0039] This allows for thorough cleaning of the bone cavity residue before inserting the head-to-head screw, effectively reducing the voids formed after the bone cement and bone fragments mix, thereby improving the bonding strength between the bone cement and the bone.

[0040] Before inserting the cephalic screw, bone cement is filled: During positive pressure bone cement filling, the sleeve 111 and the inner tube 113 are fitted together. The first connecting tube 116 is connected to the syringe, and the first connecting tube 116 is connected to the honeycomb air filter module. The honeycomb air filter module is filled with interconnected honeycomb holes and is made of transparent material using 3D printing. At this time, the syringe introduces bone cement into the interstitial cavity 115, exits through the opening 1122, and fills several guide grooves 1121. The cement contacts the cavity wall through the guide grooves 1121, penetrates into the bone, and achieves microscopic interlocking with the bone. This results in a better stable structure after the cephalic screw is inserted. In this embodiment, based on the characteristics of bone, the penetration depth of bone cement into the bone is affected by positive pressure and time. When the positive pressure is constant, excess bone cement will enter the guide channel 1121 and the inner cavity 1131, ensuring bone cement filling. Excessive pressure will prevent excessive bone cement penetration, which could lead to bone cement leakage at the joints. Especially under high pressure, high-pressure filling of the compact bone area can damage healthy bone structure, placing a significant burden on the surgery and affecting its progress. Furthermore, bone cement may leak into surrounding tissues, causing tissue inflammation and poisoning, and potentially damaging nerves and blood vessels, leading to complications. This product adds... A honeycomb air filter module is used to simulate honeycomb bone. When the pore density of the honeycomb air filter module is high, the intracavitary pressure in the bone cavity is higher during bone cement injection, assuming a constant dose per unit time. This results in a faster increase in the penetration depth of the bone cement per unit time, while also ensuring that the bone cement can return under pressure. Therefore, in practice, a honeycomb air filter module of appropriate density needs to be selected based on the density of the patient's bone on CT scan. The honeycomb air filter module serves two purposes: providing a return channel for the bone cement and relieving pressure under certain pressure conditions. In this state, due to the resistance of the honeycomb air filter module during the extraction process of bone cement, the injection pressure in the cavity can be maintained, thereby ensuring the penetration effect. On the other hand, the honeycomb air filter module has an extraction and return channel, so it has a certain pressure relief effect under high pressure. This makes it difficult for bone to continue to penetrate when the bone is relatively dense (relatively greater than the pore density of the honeycomb air filter module), thus preventing damage to the bone structure under relatively high pressure. The wall surface of the honeycomb air filter module is provided with scale lines, which indicate the amount of bone cement in the honeycomb air filter module. Therefore, the relative penetration amount of bone cement can be evaluated based on the injection volume and return flow.

[0041] In orthopedic bone cement injection, there is a specific area within the cavity where bone cement is injected for reinforcement. Therefore, in this structure, in the guide groove area of ​​the cannula where bone cement filling injection is not required, the outer side of the guide groove of the cannula adopts a closed design (solid closure 51), as shown in the figure. An airbag 52 is arranged around the wall of the annular area of ​​the closed design. The airbag is connected to the conduit 53 inside the cannula (indicated by dashed lines, which has several air holes along the axial direction of the cannula 111 for connecting the airbag inlet port; unused air holes are sealed with plugs). The conduit 53 extends out of the cannula head and is provided with a connection port 54 for connecting an inflation device. Therefore, after being introduced into the bone cavity, the airbag 52 inflates, avoiding full contact with the bone cavity, making it difficult for bone cement to permeate in the corresponding area of ​​the airbag 52. In the area where the airbag 52 is not provided, bone cement can permeate as described above and flow back through the guide groove.

[0042] See Figure 10 As an extension of the effect of bone cement filling before the head screw is inserted, the inner wall of the sleeve 111 and the outer wall of the outer tube 112 are also provided with radial grooves 114. Several sets of radial grooves 114 are provided extending from the front end to the rear side. The radial grooves 114 are used to create a certain gap for the bone cement to flow during the delivery process, so that the bone cement is released evenly during the delivery process, thereby improving the injection effect of bone cement.

[0043] The outer end wall of the casing 111 is provided with a connecting thread 116, which is adapted to the port of the medullary opening, so that the medullary opening cavity is sealed (the size of the casing 111 is adapted to the drill bit for medullary opening, so that the port position is adapted to the connecting thread 116).

[0044] The above description is merely illustrative of the invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined by the claims, all of which should fall within the protection scope of this invention.

Claims

1. A bone cement injector characterized by: The system includes a configuration module for configuring and injecting bone cement. The configuration module is connected to an inlet module for injecting the configured bone cement into the cavity of the inlet module. The configuration module includes a mixing chamber, an injection module, and a mixing module integrated into the mixing chamber. The mixing chamber has a first and a second auxiliary chamber, respectively, which are relatively sealed and isolated. The injection module includes a first drive gear, a lead screw, and an injection piston. The mixing module includes a second drive gear, a mixing rod, and a mixing paddle. The injection piston is threaded and adapts to slide and seal against the wall of the mixing chamber. The first drive gear is rotatably mounted in the first auxiliary chamber. The end of the lead screw has an internal hexagonal hole. The first transmission gear is provided with ratchet teeth, and the end of the lead screw is provided with a pawl. The second transmission gear is rotatably disposed in the first auxiliary cavity and meshes with the first transmission gear. The second transmission gear is fixed with a stirring rod extending into the stirring cavity. The stirring blade of the stirring rod is disposed adjacent to the second auxiliary cavity. The configuration module is provided with a drive motor connected to the end of the stirring rod via a coupling. The stirring cavity extends to the second auxiliary cavity via a guide tube and is connected to the injection cavity of the inlet module. The guide tube is provided with a valve nozzle, and its control handle is disposed outside the second auxiliary cavity. The configuration module also includes an injection connector, which is provided with multiple injection ports. The injection ports are adapted to be sealed with end caps. The end caps are connected to the container of bone cement raw materials via threaded adaptation.

2. A bone cement syringe according to claim 1, wherein: A stirring paddle is provided near the second auxiliary cavity of the lead screw component.

3. A bone cement injector according to claim 2, characterized in that: The mixing chamber is also connected to a flushing port.

4. A bone cement injector according to claim 3, characterized in that: The configuration module is adapted to be installed in the grip component, which includes an arc-shaped handle and a grip, and the grip is fixed to the housing of the drive component by a snap-fit.

5. A bone cement injector according to claim 4, characterized in that: The infusion module includes an injection tube, which comprises a sleeve, an outer tube, and an inner tube. The inner tube is disposed within the inner cavity of the outer tube and forms a gap cavity. The outer tube has a plurality of guide grooves axially arranged on its wall surface, and the guide grooves have a plurality of openings communicating with the gap cavity. The outer tube head has a return channel communicating with the inner tube cavity. The sleeve is adapted to be disposed on the wall surface of the outer tube, and a sliding guide block adapted to the guide groove is disposed on the inner side of the sleeve. The sliding guide block has a guide hole, and the inner end of the guide hole is adapted to the position of the opening. The outer end of the gap cavity is connected to a first connecting tube, and the outer end of the inner tube cavity is connected to a second connecting tube.

6. A bone cement injector according to claim 5, characterized in that: The inner wall of the sleeve and the outer wall of the outer tube are also interlaced with radial grooves, and several sets of radial grooves are provided extending from the front end to the rear side.

7. A bone cement injector according to claim 6, characterized in that: The outer end wall of the sleeve is threaded.

8. A bone cement injector according to claim 7, characterized in that: The first connecting pipe connects to the configuration module, and the second connecting pipe connects to the honeycomb air filter module. The honeycomb air filter module is made of transparent material and 3D printed, and is connected to the recycling chamber.

9. A bone cement injector according to claim 8, characterized in that: The drive motor is fixed to the gripping component, and the end of the gripping component is connected and fixed to the second sub-cavity through a pluggable fastener.

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