Bone crushing equipment for bone grafting operation suitable for spine surgery

Abstract

The invention relates to the technical field of crushing equipment, in particular to bone crushing equipment for bone grafting operation suitable for spine surgery. A bone crushing cavity is formed in the bone crushing machine, a bone crushing block is slidably connected to the bottom of the bone crushing cavity, and bone crushing teeth are arranged on the bone crushing block in the moving direction of the bone crushing block and the side wall of the bone crushing cavity in an array mode; an eccentric power mechanism and a pulse mechanism are arranged in the bone crushing block, the eccentric power mechanism is used for driving the bone crushing block to reciprocate, and the pulse mechanism is used for generating pulse jet flow at the bottom of the bone crushing cavity based on movement of the bone crushing block; a filtering mechanism used for filtering bone particles is further arranged on the side wall of the bone crushing cavity, a preset distance is formed between the filtering mechanism and the bottom of the bone crushing cavity, and the filtering mechanism communicates with a collecting mechanism used for collecting the bone particles. According to the invention, autologous bones can be efficiently treated, and high-quality bone particles with uniform sizes can be prepared.

Description

Technical Field

[0001] This invention relates to the field of bone fragmentation equipment technology, and more specifically to a bone fragmentation device suitable for bone grafting surgery in spinal surgery. Background Technology

[0002] In spinal surgery, bone graft fusion is a crucial step in ensuring surgical success and achieving long-term stability. Whether used to treat degenerative diseases, trauma, deformities, or tumors, autologous or allogeneic bone is typically implanted at the surgical site to promote bone healing and biological fusion of spinal segments. Therefore, the equipment and techniques used to prepare bone graft materials directly affect the quality of the bone graft, the fusion rate, and the final clinical outcome.

[0003] These existing traditional techniques have significant and undeniable drawbacks. Manual bone forceps rely on the surgeon's repeated biting and clenching to break up large pieces of bone. This method produces bone particles that are extremely uneven in size and irregular in shape, often containing oversized bone fragments and bone paste formed by excessive compression. While simple mechanical bone grinders improve efficiency to some extent, their crude design and lack of precise control mechanisms also make it difficult to obtain uniform bone particles.

[0004] This inconsistency in particle size poses a direct threat to the biological process of bone graft fusion. On the one hand, excessively large bone fragments, lacking an effective porous structure, hinder the ingrowth and migration of new blood vessels, making it difficult for the central area to achieve vascularization and activation. Ultimately, they may become unabsorbed necrotic bone islands, unable to effectively participate in bone healing, and may even become foci of infection. On the other hand, excessively small bone particles or bone paste, due to their large surface area to volume ratio, are absorbed too quickly by macrophages and other cells after implantation, failing to maintain the necessary space-occupying scaffold function, leading to rapid local bone loss and loss of the carrier function of bone conduction.

[0005] Given the shortcomings of existing technologies, there is an urgent need for a new type of bone fragmentation equipment that can efficiently process autologous bone and prepare high-quality bone particles of uniform size, thereby laying a more reliable material basis for the firm fusion of the spine. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a bone fragmentation device suitable for spinal surgery bone grafting, which improves the quality of bone particle preparation.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: A bone fragmentation device for bone grafting surgery in spinal surgery includes a bone fragmentation machine; the bone fragmentation machine has a bone fragmentation chamber, and bone fragments are slidably connected to the bottom of the bone fragmentation chamber; bone fragmentation teeth are arrayed on the bone fragments and the sidewalls of the bone fragmentation chamber in the direction of movement of the bone fragments; an eccentric power mechanism and a pulse mechanism are provided inside the bone fragments, the eccentric power mechanism is used to drive the bone fragments to reciprocate, and the pulse mechanism is used to generate a pulse jet at the bottom of the bone fragmentation chamber based on the movement of the bone fragments; a filter mechanism for filtering bone particles is also provided on the sidewalls of the bone fragmentation chamber, a preset distance is provided between the filter mechanism and the bottom of the bone fragmentation chamber, and the filter mechanism is connected to a collection mechanism for collecting bone particles.

[0008] The technical principles of the above solution are as follows:

[0009] The autologous or allogeneic bone to be processed is placed into the bone fragmentation cavity. After the eccentric power mechanism is activated, the bone fragments are driven to reciprocate along the bottom of the cavity. During the relative motion between the bone fragments and the array of bone fragmentation teeth on the cavity wall, a continuous shearing and compression effect is generated, gradually breaking down large pieces of bone.

[0010] During the movement of the bone fragments, the built-in pulse mechanism works synchronously, generating periodic pulse jets at the bottom of the bone fragmentation chamber. This jet causes the fluid inside the chamber to form an upward vortex, carrying the broken bone particles upward. In this process, smaller bone particles that meet the size requirements float to the top due to their lighter weight, while larger particles that do not meet the size requirements settle back to the bottom of the chamber due to gravity, continuing to be further broken up by the bone fragmentation teeth.

[0011] The qualified bone particles that float to the surface rise with the liquid flow to the filtration mechanism. This mechanism can be set with a sieve aperture size according to clinical needs, allowing only bone particles within the target particle size range to pass through. The filtered bone particles then enter the connected collection mechanism, achieving automatic and closed-loop collection to avoid contamination and loss.

[0012] The above approach has the following beneficial effects:

[0013] 1. This method combines mechanical shearing with pulsed fluid sorting to effectively control the particle size distribution of bone particles, avoiding the problem of large bone fragments mixed with bone paste commonly found in traditional methods. The resulting bone particles are regular in shape and uniform in size, which better meets the biological requirements of bone graft fusion.

[0014] 2. In this approach, uniform bone particles help maintain an appropriate pore structure and surface area-to-volume ratio, providing a stable osteoconduction scaffold to promote vascular ingrowth and osteoblast migration, while avoiding central necrosis due to excessively large particles or premature absorption due to excessively small particles, thereby improving bone fusion rate and surgical success rate.

[0015] 3. In this solution, pulsed flow not only enables automatic stratification of particles according to particle size, but also drives the bone particles to circulate within the cavity, avoiding deposition and blockage.

[0016] Furthermore, the eccentric power mechanism includes a rotating groove eccentrically opened within the bone fragments, a rotating wheel rotatably connected within the rotating groove, an eccentric groove opened within the rotating wheel, an eccentric wheel rotatably fitted within the eccentric groove, a rotating shaft eccentrically connected to the eccentric wheel, and a driving component coaxially and fixedly connected to the rotating shaft, the driving component being used to drive the rotating shaft to rotate.

[0017] Beneficial effects: The rotational motion of the drive component is transmitted to the eccentric wheel via the shaft. The eccentric wheel rotates planetarily within the eccentric groove of the rotating wheel, driving the rotating wheel to perform compound motion within the groove of the bone fragments. This ingenious transmission method can efficiently and smoothly convert rotational power into precise linear reciprocating motion of the bone fragments.

[0018] Furthermore, the pulse mechanism includes a reservoir chamber located within the bone fragment crusher, which stores physiological saline. An arc-shaped cavity is also formed within the bone fragment, with a limiting post slidingly engaged within it. A guide groove is formed at the bottom of the bone fragment cavity, arranged along the direction of bone fragment movement. The bottom of the limiting post slides into the guide groove. The limiting post divides the arc-shaped groove into a first region and a second region. Both the first and second regions are connected to the bottom of the bone fragment cavity and the reservoir chamber, respectively. A first one-way valve, allowing only liquid flow to the first and second regions, is connected along the communication paths between the first and second regions and the reservoir chamber. A second one-way valve, allowing only liquid flow to the bone fragment cavity, is also connected along the communication paths between the first and second regions and the bone fragment cavity.

[0019] The bone fragmentation cavity is divided into a first chamber and a second chamber by bone fragments. The first chamber is connected to the first region, and the second chamber is connected to the second region. When the volume of the first chamber is compressed and the volume of the second chamber is expanded, the pressure in the first region decreases and the pressure in the second region increases; conversely, when the volume of the first chamber expands and the volume of the second chamber is compressed, the pressure in the first region increases and the pressure in the second region decreases.

[0020] Beneficial effects: When the eccentric power mechanism drives the bone fragments to reciprocate along the guide groove, the arc-shaped cavity fixed within the bone fragments moves synchronously. Because the bottom of the limiting post is restricted to sliding within the fixed guide groove, the limiting post undergoes relative displacement within the moving arc-shaped cavity. This relative movement causes the volumes of the first and second regions into which the arc-shaped cavity is divided by the limiting post to change alternately: one region is compressed, its volume decreases, and its pressure increases sharply; the other region expands accordingly, its volume increases, and a negative pressure (relative vacuum) is formed.

[0021] Directional fluid drive (taking half a cycle as an example):

[0022] Compression Zone (High-Pressure Jet): Assuming the first region is compressed, its internal pressure rises rapidly. High-pressure saline solution forces open the second one-way valve connecting this region to the bone fragmentation cavity (e.g., the first chamber), and is injected at high speed into the bone fragmentation cavity from a specific outlet at the bottom of the cavity, forming a directional pulse jet.

[0023] Expansion Zone (Negative Pressure Replenishment): Simultaneously, the second zone is expanding to create negative pressure. This negative pressure "draws open" the first one-way valve connecting this zone to the reservoir, drawing in fresh saline solution to replenish the reservoir and prepare fluid for the next work cycle.

[0024] Cyclical alternation and synergy:

[0025] When the bone fragments move in the opposite direction, the above process is completely reversed: the second region is compressed, ejecting pulse jets into the bone fragment cavity (second chamber); at the same time, the first region expands, drawing fluid from the reservoir cavity for replenishment. Thus, each complete reciprocating motion of the bone fragments corresponds to the generation of two pulse jets that may alternate or cooperate in direction, and the direction of the jets is naturally related to the shearing motion direction of the bone fragments.

[0026] This solution utilizes the existing core mechanical motion of the equipment (reciprocating movement of bone fragments) as a power source, directly converting it into hydraulic pulses through a mechanical structure. This greatly simplifies the overall design, reduces manufacturing costs, power consumption, and equipment complexity, while improving system reliability.

[0027] The frequency and timing of the pulsed jet generation are synchronized with the shearing action of the bone fragments. This synchronization ensures timely intervention of the pulsed jet, creating the most effective dynamic vortex and fluidized sorting environment within the bone fragmentation cavity. The jet not only assists in sorting, but its impact force also performs secondary hydraulic fracturing of bone particles and prevents fine particles from depositing in dead zones.

[0028] The mechanism achieves a closed-loop self-circulation of the working fluid by automatically replenishing the reservoir through the first one-way valve. This circulation not only provides the medium for generating the jet but also continuously removes the heat generated during the crushing process, thus cooling the bone particles and helping to maintain the activity of bone cells.

[0029] Furthermore, the filtration mechanism includes several openings on the side wall of the bone fragmentation chamber, each of which is equipped with a filter plate.

[0030] Beneficial effects: The filter plate is directly installed on the side wall of the bone crushing chamber that generates the vortex, allowing the filtration process to be highly coordinated and synchronized with the pulsed flow field within the chamber. The bone particle mixture floating with the vortex directly impacts and flows through the filter plate, and qualified particles are immediately screened out, realizing a continuous dynamic integrated operation of crushing, sorting, and filtration, with efficiency far exceeding batch-based, offline filtration. Large particles that fail to pass through the filter are blocked by the filter plate and naturally fall back to the bottom of the chamber under the influence of gravity and fluid, re-entering the crushing cycle. This forms an automatic negative feedback loop, ensuring that all bone particles must be crushed to below the target size before leaving the system, thereby strictly guaranteeing the particle size uniformity of the final product.

[0031] Furthermore, the collection mechanism includes a collection chamber located inside the bone crusher, and a collection channel connects the collection chamber to the opening.

[0032] Beneficial effects: The collection channel directly connects the filtration mechanism (opening / filter plate) to the collection chamber inside the equipment, so that the entire process from bone crushing, sorting, filtration to collection is completed in one go within a closed system.

[0033] Furthermore, the reservoir is equipped with a thermoelectric cooler and a temperature sensor. The temperature sensor is used to collect the temperature information of the saline solution, and the thermoelectric cooler is used to lower the temperature of the saline solution. It also includes a control unit, which is used to control the operation of the thermoelectric cooler based on the saline solution temperature information, so that the saline solution is maintained within a preset temperature range.

[0034] Beneficial effects: In traditional bone fragmentation processes, mechanical shearing and friction generate significant heat, leading to an increase in the temperature of bone particles. Excessively high local temperatures can directly damage or kill bone cells and growth factors, causing the transplanted material to lose its valuable osteoinductive activity and become dead bone that only serves as a scaffold.

[0035] The circulating saline solution is actively cooled by a semiconductor cooling chip and then delivered to the bone fragmentation cavity via a pulsed jet, directly and efficiently removing the heat generated in the fragmentation zone. The control unit dynamically adjusts the cooling power based on real-time feedback from temperature sensors, ensuring that the saline solution and bone fragment environment are stably maintained within a preset low-temperature range (e.g., 4-10°C). This minimizes the risk of thermal necrosis and protects the vitality of inherent osteoblasts, mesenchymal stem cells, and BMP in autologous or allogeneic bone, providing high-quality, bioactive materials for bone graft fusion.

[0036] Furthermore, the bottom of the bone fragmentation chamber is connected to several recovery channels and several filters. Each recovery channel is equipped with a valve, and the filter is located above the valve.

[0037] Beneficial effects: After bone particle preparation, the bottom of the bone fragmentation cavity often retains tiny, unbroken bone fragments, bone paste, adipose tissue, blood, and some saline solution. Traditional equipment requires disassembly and cleaning, which is time-consuming and labor-intensive. This design, by opening a valve in the recovery channel, allows these residues to be preliminarily filtered by a filter under gravity or negative pressure before being discharged into a dedicated recovery channel. This achieves automatic cleaning without disassembly, greatly improving the equipment preparation efficiency during surgical intervals.

[0038] Furthermore, a sealing cap is rotatably connected to the top of the bone fragmentation cavity.

[0039] Beneficial effects: The sealing cap closes after the bone fragments are inserted into the device, providing a reliable physical seal for the entire bone fragmentation chamber. This fundamentally prevents contaminants such as bacteria and dust from the operating room environment from entering the chamber where the bone material is being processed. It also eliminates the possibility of aerosols, fine bone fragments, or liquid droplets splashing out during the fragmentation process, providing the highest level of sterility for the entire process and greatly reducing the risk of postoperative infection.

[0040] Furthermore, the recycling channel is connected to the collection chamber.

[0041] Beneficial effects: After the surgeon removes and uses the qualified bone particles from the collection chamber, the valve of the recycling channel can be opened immediately. At this time, the waste fluid and impurities remaining at the bottom of the bone fragmentation chamber will be directly discharged into the now-emptied collection chamber through the recycling channel. Subsequently, simply remove and dispose of the collection chamber (or the disposable inner bag / container inside), and the use of the product and the disposal of waste can be completed in one go.

[0042] Furthermore, a waste liquid tank is connected to the bottom of the collection chamber, and a sieve plate is installed on the waste liquid tank.

[0043] Beneficial effects: When a suspension carrying qualified bone particles enters the collection chamber, the liquid components (physiological saline, blood, etc.) will naturally pass through the sieve plate and flow into the waste liquid tank below, while the solid bone particles are effectively trapped by the sieve plate in the upper part of the collection chamber. Attached Figure Description

[0044] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the bone fragmentation device for bone grafting surgery in spinal surgery according to the present invention;

[0045] Figure 2 for Figure 1 A front view of an embodiment of a bone fragmentation device for bone grafting surgery applicable to spinal surgery;

[0046] Figure 3 for Figure 2 Sectional view along the AA direction;

[0047] Figure 4 for Figure 3Cross-sectional view of the bone crusher in the BB direction.

[0048] The reference numerals in the accompanying drawings include: 1. Bone crusher; 2. Sealing cover; 101. Bone crushing chamber; 102. Bone fragments; 103. Collection channel; 104. Filter screen; 105. Collection chamber; 106. Liquid storage chamber; 107. Filter plate; 108. Drive component; 109. Valve; 110. Limiting post; 111. Rotating shaft; 112. Arc-shaped cavity; 113. Eccentric wheel; 114. Guide groove; 115. Rotating wheel; 116. First one-way valve; 117. Second one-way valve. Detailed Implementation

[0049] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] The following detailed description illustrates the specific implementation method:

[0053] Example:

[0054] As attached Figure 1 -Appendix Figure 4The image shows a bone fragmentation device for bone grafting surgery in spinal surgery, comprising a bone fragmenter 1; the bone fragmenter 1 has a bone fragmentation chamber 101, and a sealing cover 2 is rotatably connected to the top of the bone fragmentation chamber 101. Bone fragments 102 are slidably connected to the bottom of the bone fragmentation chamber 101, and bone fragment teeth (not shown in the figure) are arrayed and welded to the side walls of the bone fragments 102 and the bone fragmentation chamber 101 in the direction of movement of the bone fragments 102. An eccentric power mechanism and a pulse mechanism are provided inside the bone fragments 102, the eccentric power mechanism being used to drive the reciprocating movement of the bone fragments 102. Specifically, the eccentric power mechanism includes a rotating groove eccentrically opened in the bone fragment 102, a rotary wheel 115 rotatably connected in the rotating groove, an eccentric groove opened in the rotary wheel 115, an eccentric wheel 113 rotatably fitted in the eccentric groove, a rotating shaft 111 eccentrically connected on the eccentric wheel 113, and a driving component 108 coaxially fixedly connected to the rotating shaft 111. In this embodiment, the driving component 108 is a servo motor, and the output shaft of the servo motor is coaxially fixedly connected to the rotating shaft 111 through a coupling. The servo motor is installed at the bottom of the bone fragment cavity 101.

[0055] The pulse mechanism is used to generate a pulsed jet at the bottom of the bone fragment cavity 101 based on the motion of the bone fragment 102. Specifically, in conjunction with the attached... Figure 3 As shown, the pulse mechanism includes a reservoir 106 located within the bone crusher 1, which stores physiological saline. Preferably, a thermoelectric cooler and a temperature sensor are installed in the reservoir 106. The temperature sensor is used to collect physiological saline temperature information, and the thermoelectric cooler is used to lower the physiological saline temperature. The mechanism also includes a control unit, which controls the operation of the thermoelectric cooler based on the physiological saline temperature information to maintain the physiological saline within a preset temperature range (e.g., 4-10°C).

[0056] An arc-shaped cavity 112 is also provided inside the bone fragment 102. A limiting post 110 is slidably fitted inside the arc-shaped cavity 112. A guide groove 114 is provided at the bottom of the bone fragment cavity 101. The guide groove 114 is arranged along the moving direction of the bone fragment 102. The bottom of the limiting post 110 is slidably fitted with the guide groove 114. The limiting post 110 divides the arc-shaped groove into a first region and a second region. The first region and the second region are respectively connected to the bottom of the bone fragment cavity 101 and the liquid storage cavity 106. A first one-way valve 116 for allowing only liquid to flow into the arc-shaped groove is connected to the communication path between the first region and the second region and the liquid storage cavity 106. A second one-way valve 117 for allowing only liquid to flow into the bone fragment cavity 101 is connected to the communication path between the first region and the second region and the bone fragment cavity 101.

[0057] The bone fragmentation cavity 101 is divided into a first chamber and a second chamber by bone fragments 102. The first chamber is connected to the first region, and the second chamber is connected to the second region. When the volume of the first chamber is compressed and the volume of the second chamber is expanded, the pressure in the first region decreases and the pressure in the second region increases; conversely, when the volume of the first chamber expands and the volume of the second chamber is compressed, the pressure in the first region increases and the pressure in the second region decreases.

[0058] The side wall of the bone fragmentation cavity 101 is also provided with a filtering mechanism for filtering bone particles. Specifically, the filtering mechanism includes several openings on the side wall of the bone fragmentation cavity 101, and each opening is fixedly connected with a filter plate 107.

[0059] A preset distance (e.g., 5-7 cm) is provided between the filter plate 107 and the bottom of the bone crushing chamber 101, and the opening is connected to a collection mechanism for collecting bone particles. Specifically, the collection mechanism includes a collection chamber 105 opened inside the bone crusher 1, and a collection channel 103 is connected between the collection chamber 105 and the opening. Preferably, a waste liquid tank (not shown in the figure) is connected to the bottom of the collection chamber 105, and a sieve plate is installed on the waste liquid tank.

[0060] Preferably, the bottom of the bone fragmentation chamber 101 is also connected to several recovery channels and several filter screens 104. Each recovery channel is equipped with a valve 109, and the filter screen 104 is located above the valve 109. In this embodiment, the recovery channels are all connected to the collection chamber 105. In some other embodiments, the recovery channels can be connected to other collection devices.

[0061] The specific implementation process is as follows:

[0062] Open the rotating sealing cap 2 and place the autologous bone fragment taken during the operation or the prepared allogeneic bone fragment into the bone fragmentation cavity 101. Close and lock the sealing cap 2 to ensure that the bone fragmentation cavity 101 is completely sealed.

[0063] Start the device. The control unit first controls the semiconductor cooling chip to operate based on the feedback from the temperature sensor, precooling the saline solution in the reservoir 106 and maintaining it in a preset low temperature range (such as 4-10℃).

[0064] The drive unit 108 (servo motor) is activated, which drives the eccentric wheel 113 to rotate via the rotating shaft 111. The eccentric wheel 113 performs planetary motion within the eccentric groove of the rotary wheel 115, thereby driving the rotary wheel 115 to perform reciprocating rotation at a limited angle within the rotating groove of the bone fragment 102. This composite motion is transmitted through the structure and ultimately transformed into a stable, high-speed linear reciprocating motion of the bone fragment 102 along the guide groove 114 at the bottom of the bone fragment cavity 101.

[0065] During the movement, the array of bone fragments fixed to the sidewalls of bone fragment 102 and bone fragment cavity 101 undergoes relative staggered shearing, efficiently breaking up large pieces of bone.

[0066] At the same time, the reciprocating motion of the bone fragment 102 synchronously drives the pulse mechanism to work:

[0067] As the bone fragment 102 moves to one side (e.g., the right side), the volume of the second chamber is compressed, and the bone fragments inside are subjected to compression and shearing; the volume of the first chamber expands. The arc-shaped cavity 112 fixed inside the bone fragment 102 moves accordingly. Since the bottom of the limiting post 110 is fixed in the guide groove 114 and slides, the limiting post 110 slides relative to each other in the arc-shaped cavity 112, causing the volume of the first region to expand and form a negative pressure, while the compression pressure of the second region increases.

[0068] In the second region where the pressure increases, the low-temperature saline opens its corresponding second one-way valve 117 and is injected at high speed into the bottom of the second chamber, forming a strong pulse jet. At the same time, the first region, which forms a negative pressure, replenishes itself by drawing new cold saline from the reservoir 106 through its corresponding first one-way valve 116.

[0069] When the bone fragment 102 moves in the opposite direction (to the left), the above process is completely reversed, the first region generates a jet that is injected into the first chamber, and the second region is replenished with liquid from the reservoir 106.

[0070] Thus, with each reciprocating motion of the bone fragment 102, two low-temperature pulse jets are alternately generated at the bottom of the two chambers. These jets generate strong upward eddies within the bone fragmentation chamber 101, causing the initially fragmented bone particles to suspend and tumble. Small, suitable particles float to the surface with the eddies, while excessively large or heavy particles sink back to the bottom of the chamber to continue being sheared by the bone-crushing teeth until their size is reduced and they are carried away by the eddies, thereby achieving continuous crushing and dynamic hydraulic separation.

[0071] The bone particle suspension, which meets the size requirements and floats to the surface with the eddy current, reaches the opening on the side wall of the bone fragmentation chamber 101. The liquid and bone particles smaller than the pore size of the filter plate 107 pass through the filter plate 107, enter the collection channel 103, and finally flow into the collection chamber 105.

[0072] Inside the collection chamber 105, the liquid components (physiological saline and a small amount of blood) seep through the bottom sieve plate into the waste liquid tank below, while the moist, loose, non-dripping "dry" bone particles are trapped in the collection chamber 105 space above the sieve plate, completing automatic solid-liquid separation.

[0073] Once the bone particles are prepared, open the collection chamber 105 and take out the high-quality bone particles for direct bone grafting.

[0074] After bone grafting is completed, the equipment is cleaned: valve 109 of the recovery channel is opened, and cleaning fluid is poured into the bone fragmentation chamber 101. At this time, the liquid waste and fine bone paste remaining at the bottom of the bone fragmentation chamber 101 pass through the filter screen 104 (to prevent large particles from clogging) under the action of gravity and fluid impact, and are directly discharged into the emptied collection chamber 105 through the recovery channel, and finally enter the waste liquid tank through the sieve plate for collection, so as to facilitate subsequent treatment.

[0075] Throughout the process, the control unit continuously monitors the temperature of the saline solution and maintains a constant temperature by adjusting the power of the semiconductor cooling chip, thereby effectively protecting bone cell activity. The sealed cap 2 ensures that the entire process is conducted in a closed, sterile environment, preventing contamination and splashing.

[0076] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A bone fragmentation device for bone grafting surgery in spinal surgery, comprising a bone fragmenter (1); characterized in that, The bone crusher (1) has a bone crushing chamber (101) inside, and bone fragments (102) are slidably connected to the bottom of the bone crushing chamber (101). Bone crushing teeth are arrayed on the side walls of the bone fragments (102) and the bone crushing chamber (101) in the direction of movement of the bone fragments (102). An eccentric power mechanism and a pulse mechanism are provided inside the bone fragments (102). The eccentric power mechanism is used to drive the bone fragments (102) to move back and forth. The pulse mechanism is used to generate a pulse jet at the bottom of the bone crushing chamber (101) based on the movement of the bone fragments (102). A filter mechanism for filtering bone particles is also provided on the side wall of the bone crushing chamber (101). A preset distance is provided between the filter mechanism and the bottom of the bone crushing chamber (101). The filter mechanism is connected to a collection mechanism for collecting bone particles.

2. The bone fragmentation device for bone grafting surgery in spinal surgery according to claim 1, characterized in that, The eccentric power mechanism includes a rotating groove eccentrically opened in the bone fragment (102), a rotary wheel (115) rotatably connected in the rotating groove, an eccentric groove opened in the rotary wheel (115), an eccentric wheel (113) rotatably fitted in the eccentric groove, a rotating shaft (111) eccentrically connected on the eccentric wheel (113), and a driving component (108) coaxially fixedly connected to the rotating shaft (111), the driving component (108) being used to drive the rotating shaft (111) to rotate.

3. The bone fragmentation device for bone grafting surgery in spinal surgery according to claim 2, characterized in that, The pulse mechanism includes a reservoir (106) located within the bone crusher (1), which stores physiological saline. An arc-shaped cavity (112) is also provided within the bone fragment (102), and a limiting post (110) slides within the arc-shaped cavity (112). A guide groove (114) is provided at the bottom of the bone crusher (101), and the guide groove (114) is arranged along the moving direction of the bone fragment (102). The bottom of the limiting post (110) slides within the guide groove (114). The arc-shaped groove is divided into a first region and a second region. The first region and the second region are respectively connected to the bottom of the bone crushing chamber (101) and the liquid storage chamber (106). The first region and the second region are connected to the liquid storage chamber (106) through a first one-way valve (116) for allowing only liquid to flow to the first region and the second region. The first region and the second region are connected to the bone crushing chamber (101) through a second one-way valve (117) for allowing only liquid to flow to the bone crushing chamber (101). The bone fragment cavity (101) is divided into a first chamber and a second chamber by bone fragments (102). The first chamber is connected to the first region, and the second chamber is connected to the second region. When the volume of the first chamber is compressed and the volume of the second chamber is expanded, the pressure in the first region decreases and the pressure in the second region increases. Conversely, when the volume of the first chamber expands and the volume of the second chamber is compressed, the pressure in the first region increases and the pressure in the second region decreases.

4. The bone fragmentation device for bone grafting surgery in spinal surgery according to claim 3, characterized in that, The filtration mechanism includes several openings on the side wall of the bone fragmentation chamber (101), and each opening is provided with a filter plate (107).

5. The bone fragmentation device for bone grafting surgery in spinal surgery according to claim 4, characterized in that, The collection mechanism includes a collection chamber (105) located inside the bone crusher (1), and a collection channel (103) is connected between the collection chamber (105) and the opening.

6. The bone fragmentation device for bone grafting surgery in spinal surgery according to claim 5, characterized in that, The reservoir (106) is equipped with a thermoelectric cooler and a temperature sensor. The temperature sensor is used to collect the temperature information of the saline solution, and the thermoelectric cooler is used to reduce the temperature of the saline solution. It also includes a control unit, which is used to control the operation of the thermoelectric cooler based on the saline solution temperature information so that the saline solution is maintained in a preset temperature range.

7. The bone fragmentation device for bone grafting surgery in spinal surgery according to claim 6, characterized in that, The bottom of the bone fragmentation chamber (101) is also connected to several recycling channels and several filter screens (104). Each recycling channel is equipped with a valve (109), and the filter screen (104) is located above the valve (109).

8. The bone fragmentation device for bone grafting surgery in spinal surgery according to claim 7, characterized in that, The top of the bone fragmentation cavity (101) is rotatably connected to a sealing cap (2).

9. The bone fragmentation device for bone grafting surgery in spinal surgery according to claim 8, characterized in that, The recycling channel is connected to the collection chamber (105).

10. The bone fragmentation device for bone grafting surgery in spinal surgery according to claim 9, characterized in that, The bottom of the collection chamber (105) is connected to a waste liquid tank, and a sieve plate is installed on the waste liquid tank.

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