39 results about "Bone cement" patented technology

The application discloses a mold for manufacturing a shoulder joint spacer and a preparation method thereof, belongs to the technical field of shoulder joint spacer preparation, and solves the problems of uneven distribution of medicine application grooves and the inability to flexibly adjust the size, length and the like according to requirements, and comprises a lower mold box, an upper mold box, an intramedullary bone cement silica gel forming adjusting mold and a ball head forming adjusting mold which are sleeved in the lower mold box and the upper mold box, a pouring gate which is arranged on the lower mold box and the upper mold box, a plugging plug which is arranged in the pouring gate, a first positioning support column and a second positioning support column which are arranged in the lower mold box, a third positioning support column and a fourth positioning support column which are arranged in the upper mold box, and a metal support rod which is arranged on the axial center lines of the intramedullary bone cement silica gel forming adjusting mold and the ball head forming adjusting mold; and the intramedullary bone cement silica gel forming adjusting mold and the ball head forming adjusting mold are uniformly provided with protruding portions.

This invention discloses a method for preparing and applying a shell-core composite flexible biomaterial. The flexible biomaterial consists of an outer PMMA electrospun layer, a middle PTFF or PE layer, and a core PEG hydrogel; both the PMMA electrospun layer and the middle layer are porous. This flexible material is soft and elastic, exhibiting good film-forming and osteogenic induction effects. Animal experiments have confirmed that, compared to traditional bone cement, the flexible composite bone cement-induced biofilm shows an increase in CD31-positive cells (representing angiogenesis) and M2 macrophages (representing tissue repair), exhibiting better film-forming properties. It is a promising composite biomaterial that can be widely applied in the treatment of soft tissue defects, bone defects, and bone infections, achieving better therapeutic effects.

The present application belongs to the technical field of medical textile material forming, and relates to a bone filling bag, which comprises a bag body. The bag body is integrally formed by a yarn warp knitting process to obtain a bag-shaped bag with a closed end. The surface of the bag body is distributed with through holes. The yarn is a multifilament. The through holes are not naturally formed by the warp knitting process, but are formed by punching after the warp knitting process. The present application optimizes the bag fabric structure, can inhibit yarn slippage, guarantee the structural stability of the bag under high pressure, and can customize the through hole structure as needed to realize controllable targeted dispersion of bone cement, adapt to various complex clinical scenarios, and has a simple preparation process, effectively solving the technical problems of poor structural stability of the existing bone filling bag, uncontrollable dispersion of bone cement, and complicated preparation.

The application discloses a pedicle screw system, which comprises a screw expansion sleeve, a screw body, a fixing base, a fastening nut, a fixing rod, a guide cylinder and a bone cement injection device; the screw expansion sleeve is provided with a connecting sheet with a gradient structure and expansion wings with through grooves, can reversely engage with a bone hole, and has good anti-loosening effect. The guide cylinder can realize component positioning and assembly guiding, and can also cooperate with the bone cement injection device to complete preoperative bone cement pre-injection strengthening before the screw body and the fixing base are assembled. The fixing base is provided with a guide plate and a limiting type fixing rod, and assembly positioning is convenient. The pedicle screw system has high fixing strength, is suitable for osteoporosis patients, does not need secondary surgery, is simple in assembly, and has strong clinical practicability.

The application relates to the field of vertebral puncture instruments, and discloses a vertebral body shaping tool system which comprises a puncture needle, a needle core, a guide needle, a push rod and a reamer, the puncture needle comprises a needle rod and a double-ball type handle I, the needle rod is of a hollow structure, and the double-ball type handle I is fixedly installed at the top end of the needle rod. The application has the following advantages and effects: the bone cement hardness can be conveniently and accurately detected, the in-vivo bone cement hardening condition can be accurately judged, unilateral adjacent multiple vertebral bodies can be synchronously punctured and injected with bone cement, the operation time is shortened, the operation complications are reduced, the C-arm perspective and the radiation exposure are reduced, the application has the advantages of higher efficiency and higher safety, the double-ball type handle is arranged, the doctor can hold and operate in accordance with ergonomics, the holding force of the doctor is reduced during operation, the operation mechanical torque is increased, the operation is more labor-saving, the holding is more convenient, the unilateral multiple vertebral bodies can be simultaneously punctured, the puncture accuracy and the one-time success probability are increased, and the operation time is further shortened.

The invention relates to a device for manufacturing bone cement, the device comprising a storage container for receiving a sealed vessel containing a monomer liquid, and a cartridge for mixing the bone cement, wherein the cartridge comprises a first chamber for receiving the monomer liquid from the storage container and a second chamber for receiving a bone cement powder, and wherein the cartridge further comprises a valve fluidically connecting the first chamber to the second chamber, wherein the device is designed and configured to, in a first step, release the monomer liquid from the sealed vessel within the storage container and deliver it to the first chamber of the cartridge, in a second step, hold the monomer liquid within the first chamber, wherein contact of the monomer liquid with the second chamber of the cartridge is avoided, and, in a third step, deliver the monomer liquid from the first chamber of the cartridge into the second chamber of the cartridge.

A cement restrictor inserter instrument (130) comprises an inserter (131) having a handle (132) at a proximal end, a cement restrictor attachment formation (137) at a distal end for releasably attaching a cement restrictor (150), a shaft (136) extending from the proximal end to the distal end and a stop (138) on the shaft and between the proximal end and the distal end; and a body (140) having a shape corresponding to the shape of an orthopaedic prosthetic implant, a spacer (142), a visible depth guide feature (190) and a releasable attachment mechanism by which the body is releasably attachable to the shaft, and wherein the spacer is configured to position the visible depth guide feature at a fixed position relative to the inserter when the spacer abuts the stop corresponding to a target cement restrictor position when the visible depth guide feature is aligned with a feature of a bone of a patient in which the cement restrictor is to be inserted.

The application discloses a percutaneous minimally invasive porous pedicle screw, which comprises a screw tip, a screw body and a screw seat; the screw is integrally formed by using an additive manufacturing technology; the screw body comprises a threaded segment, the thread teeth of the threaded segment are formed by a dense solid metal, and the screw groove bottoms and the screw rod main body region between the thread teeth are formed by a three-dimensionally communicated porous structure; the screw is provided with a through minimally invasive hole along an axis; a bone cement hole which is in communication with the outside is arranged on the side wall of the minimally invasive hole; the edge of the bone cement hole is provided with a solid wall with a thickness of 0.2-0.4 mm; the minimally invasive hole is arranged on the screw axis, and the bone cement hole which is in communication with the outside is arranged on the side wall of the minimally invasive hole, so that the problems, such as jamming, deviation from the track and generation of metal debris due to the rough edges of the porous structure, and outflow and solidification of bone cement at the specified position, can be effectively avoided; and the design that the thread teeth are in a solid structure and the screw rod main body between the thread teeth is a three-dimensionally communicated porous structure guarantees the mechanical strength and instant holding force of the screw.

The application discloses a low-melting-point alloy / temperature-sensitive hydrogel composite bone cement and a preparation method thereof. The temperature-sensitive hydrogel is wrapped outside the low-melting-point alloy, the liquid temperature-sensitive hydrogel can absorb the heat released by the low-melting-point alloy during solidification and is converted into a gel state, and the low-melting-point alloy is rapidly cooled after being wrapped by the temperature-sensitive hydrogel and is not in direct contact with the surrounding bone tissue, so that the low-melting-point alloy avoids causing thermal damage to the surrounding tissue, reduces the pain of patients, promotes the rapid healing of the affected area, and the composite bone cement also has the advantages of fast solidification speed, simple preparation process, stable structure in the in-vivo and in-vitro environments and the like.

1. Name of the product in this design: Bone cement mixing rod. 2. Application of this design: A manual bone cement mixing stick used in orthopedic surgery in the medical field. 3. The key design features of this product are the combination of shape and pattern. 4. The image or photograph that best illustrates the design's key points: a 3D model.

An apparatus for providing a liquid component as a first starting component of a bone cement dough from two starting components, comprising a receptacle in which a tank containing the liquid component can be stored, an opening means for opening the tank, a reservoir, fluidically connected to the receptacle, for receiving the liquid component from the tank, at least one port for fluidically connecting the apparatus to a syringe in which a powder component can be stored as a second starting component of the bone cement dough, and at least one conducting means which fluidically connects the reservoir and the at least one port to one another.

This utility model relates to the field of dental implant technology, specifically to a composite abutment implant system capable of being filled with bone cement. The specific technical solution is as follows: A composite abutment implant system capable of being filled with bone cement includes an abutment, which is connected to an implant via a central screw. The central screw has a through-channel, and its sidewall has a through-hole communicating with the screw channel. The implant has several branch channels on its sidewall, which communicate with the main channel on the implant and are perpendicular to the implant's axis. The abutment system disclosed in this utility model allows the bone cement to solidify within the internal channels, avoiding interference with the screw channels and preventing limitations on the abutment connection, while simultaneously increasing the stability of the connection between the implant and the abutment.

This invention relates to the field of medical device technology and discloses a bone cement mixing and filling device, including a mixing chamber and a chamber cover. A feed pipe and a drive motor are located at the top of the chamber cover, and a mounting block is located at the bottom of the chamber cover. An installation cavity is formed inside the mounting block, and a magnetic active end is rotatably connected to the installation cavity via a first bearing. The output end of the drive motor is connected to the magnetic active end. An installation groove is formed at the bottom of the mounting block, which is not connected to the installation cavity. An installation ring is located in the installation groove, and a magnetic driven end is rotatably connected to the inner ring of the installation ring via a second bearing. The magnetic driven end is attracted and driven by the magnetic active end, and a mixing assembly is mounted on the magnetic driven end. An air pipe is also connected to the feed pipe, and an external pressurizing device is connected to the air pipe. A syringe is also connected to the bottom of the mixing chamber via an injection tube. This invention, by isolating the magnetic active end from the interior of the mixing chamber, has the advantage of ensuring the service life and effectiveness of the device.

A method and apparatus for preventing bone cement leakage, an electronic device, and a storage medium. The method for preventing bone cement leakage comprises: determining, from historical cases, a first surgical method conforming to condition information of a current patient, and first material parameters of postoperative bone, wherein the first surgical method comprises first surgical parameters (S11); on the basis of the first surgical method, the first material parameters, and a preoperative three-dimensional model of the fractured vertebral body of the current patient, simulating a diffusion status of bone cement injected into the body according to the first surgical method, so as to obtain a first predicted morphology representing the diffusion status of the bone cement (S12); using an evaluation model to evaluate the first surgical method on the basis of the first predicted morphology, so as to obtain a baseline evaluation score (S13); and adjusting the first surgical parameters on the basis of the baseline evaluation score for the purpose of improving the evaluation score, so as to obtain a target surgical method (S14). By using the method for preventing bone cement leakage, the risk of bone cement leakage can be reduced, thereby effectively preventing bone cement leakage.

The present invention relates to a poly(methyl methacrylate) (PMMA) based bone cement composition comprising a softener and the use of said bone cement composition in discoplasty procedures. The use is characterized by injection of the composition into a disc, hence stabilizing the intravertebral disc, reducing lower back pain and increasing life quality in the affected subject.

This utility model belongs to the field of medical device technology, and provides a bone cement wheel system mixing mechanism and a bone cement mixer. The bone cement wheel system mixing mechanism includes a toothed cover, a mixing drive disk, and a mixer. The mixer has a mixing space. It drives the mixing component to rotate by rotating the mixing drive disk, and at the same time drives the mixing component to rotate by rotating the toothed cover, realizing the effect of dual rotation of the mixing component's self-rotation and revolution. This makes the fluid in the axial direction of the mixing component turbulent and turbulent, thereby realizing rapid and thorough all-round three-dimensional mixing of bone cement, so as to fully realize the mechanical properties of bone cement implanted in the human body, and achieve and meet the purpose and efficacy of surgery and treatment.

The present application relates to a kind of porous hydroxyapatite microsphere modified PMMA bone cement preparation method and its product and application, contain gelatin, alpha-TCP, the mixed aqueous solution of hydroxyapatite as water phase solution, into vegetable oil to obtain O / W type emulsion;Add demulsifier, further crosslinking gelatin is added simultaneously with glutaraldehyde solution, centrifugal extraction microsphere, washing freeze-drying calcination obtains porous hydroxyapatite microsphere;Microsphere is added in PMMA powder to prepare and obtain porous hydroxyapatite microsphere modified PMMA bone cement.The porous hydroxyapatite microsphere prepared in the present application has good biological activity, biocompatibility and bone conduction, and its micropore is conducive to bone cell growth, nutrient transport and metabolic product discharge.Modified PMMA bone cement can regulate the mechanical properties of PMMA bone cement.

Device (100, 100') for providing a bone cement dough (500) from two starting components, comprising a mixing unit (200, 200') with an interior space (210, 210') in which a bone cement powder (510, 510') is stored or can be stored as the first starting component, a reservoir (300, 300') with a reservoir container (310, 310') in which at least one fluid-conducting closed monomer liquid container (320, 320') filled with a monomer liquid (520, 520') is stored or can be stored as the second starting component, a transfer unit (400, 400') comprising a hollow cylinder (410, 410') and a delivery piston (420, 420') which can be displaced axially in the hollow cylinder (410, 410'), wherein the mixing unit (200, 200') and the reservoir (300, 300') are or can be connected to one another in a fluid-conducting manner via the hollow cylinder (410, 410'), wherein the monomer liquid container (320, 320') in the device (100, 100') can be opened in such a way that the monomer liquid (520,520') from the reservoir (300, 300') into the hollow cylinder (410, 410') via a passage (330, 330') and can be conveyed from the hollow cylinder (410, 410') into the interior (210, 210') by axial displacement of the delivery piston (420, 420') in the hollow cylinder (410, 410'), characterized in that in a first configuration of the device (100, 100'), the delivery piston (420, 420') is connected to an opening means (430, 430'), so that axial displacement of the delivery piston (420, 420') from a first position to a second position pushes the opening means (430, 430') against the monomer liquid container (320, 320'), so that the monomer liquid container (320, 320') can be opened in a fluid-conducting manner by the opening means (430, 430') and the monomer liquid (520, 520') can flow from the reservoir (300, 300') via the passage (330, 330') into the hollow cylinder (410, 410'), and that in a second configuration of the device (100,100') the delivery piston (420, 420') is separated from the opening means (430, 430'), so that the monomer liquid (520, 520') can be delivered from the hollow cylinder (410, 410') into the interior (210, 210') by a continued axial displacement of the delivery piston (420, 420') from the second position towards a third position.

This invention pertains to the field of bone cement, specifically a bone cement mixing device. Addressing the problem that existing devices cannot break the laminar flow and local concentration gradients during the mixing process, leading to low mixing efficiency, difficulty in removing air bubbles, and uneven strength after bone cement curing, the following solution is proposed: The device includes a cylinder with a detachable threaded cap at its top. A first mixing component is mounted on the cap, used for clockwise mixing of the bone cement within the cylinder. A second mixing component is also mounted on the first mixing component, used for counter-clockwise mixing of the bone cement within the cylinder. This invention achieves bidirectional synchronous mixing under a single power source by combining the two mixing components, forming a three-dimensional shear flow field. This shortens the mixing time, reduces the risk of residual air bubbles, and improves the mixing uniformity of the bone cement powder and liquid, thereby optimizing the curing strength and handling performance of the bone cement.

The utility model discloses a hollow's can add the bone cement's take line anchor nail, relate to medical instrument technical field, including anchor nail, handle and bone cement injection sleeve, handle and bone cement injection sleeve inside are hollow, and the inside wall of handle and the outside wall of bone cement injection sleeve abut, the tip of handle is connected with anchor nail, and the bottom of bone cement injection sleeve is communicated with anchor nail through handle, and is equipped with the side hole on the lateral wall of anchor nail, and the top of bone cement injection sleeve and the blunt end of handle abut. The utility model discloses a hollow's can add the bone cement's take line anchor nail, and the bone cement is injected into the bone cement injection hole of anchor nail through bone cement injection sleeve, and flows out through the side hole of bone cement anchor nail, and fills in the junction of anchor nail and bone, plays the role of fixed bone cement anchor nail, and the bone cement is filled in the loose bone gap, plays the role of reinforcing bone, can also make the design size of anchor nail body correspondingly reduce.

The application belongs to the technical field of biological medical material production and preparation, and discloses an antibacterial degradable calcium phosphate bone cement and a preparation method thereof. The raw material of the bone cement comprises a solid-phase powder component and a curing liquid, 330-360 muL of the curing liquid is required for every 0.7 g of the solid-phase powder component; the solid-phase powder component comprises tetracalcium phosphate powder, anhydrous dicalcium phosphate powder and strontium-copper-doped beta-tricalcium phosphate powder, the molar ratio of the tetracalcium phosphate powder to the anhydrous dicalcium phosphate powder is 1:1, and the mass ratio of the sum of the mass of the tetracalcium phosphate powder and the mass of the anhydrous dicalcium phosphate powder to the mass of the strontium-copper-doped beta-tricalcium phosphate powder is (7-9):(1-3). The degradation rate of the bone cement is well matched with human bone, and the bone cement has the characteristics of good antibacterial property, good biocompatibility and good mechanical property, and the bone cement product will have good application prospect in the field of orthopedics.

This invention discloses a bone cement possessing both antibacterial properties and high mechanical strength. The invention involves the methacrylylation modification of polylysine, followed by a cross-linking reaction to form a hydrogel, which is then mixed with a solidifying agent powder to successfully prepare a novel bone cement. This material not only exhibits excellent antibacterial activity but also possesses superior mechanical properties and good biocompatibility, making it widely applicable in the field of bone tissue repair and regeneration engineering.

This invention relates to a bone cement composition, characterized in that: as a bone cement composition comprising polymethyl methacrylate (PMMA) and microbeads, the mixing ratio of said PMMA and microbeads satisfies 0.0014x 2 ‑0.0221x+0.1816≤P / M≤0.0014x 2 -0.0165x + 2.243 (P is the weight (g) of polymethyl methacrylate, M is the weight (g) of microbeads, and x is the bone strength value, ranging from 1.5 to 45). According to the present invention, the mixing ratio of polymethyl methacrylate and microbeads for providing a customized bone cement composition with bone strength and mechanical properties (strength) similar to those of the bone cement recipient can be determined. Therefore, when the prepared bone cement composition and bone cement are applied to the bone cement recipient, a rapid therapeutic effect can be achieved.

The application discloses drug-resistant bacteria-resistant bone cement containing polypeptides and belongs to the technical field of medical materials. The novel bone cement obtained by adding polypeptides with drug-resistant bacteria resistance activity has good antibacterial property and biocompatibility, can effectively kill drug-resistant bacteria, and the drug-resistant bacteria are methicillin-resistant Staphylococcus aureus.

The application provides a quick-setting magnesium oxychloride bone cement as well as a preparation method and application thereof. The raw material composition of the quick-setting magnesium oxychloride bone cement comprises a solid phase and a liquid phase; the solid phase comprises magnesium oxide, magnesium chloride, zinc chloride and strontium hydrogen phosphate; and the liquid phase is water. The mass ratio of zinc chloride to magnesium chloride is (1-2):(9-8); the mass of strontium hydrogen phosphate is 3-5 wt.% of the total weight of magnesium oxide, magnesium chloride and zinc chloride. The ratio of the total mass of zinc chloride and magnesium chloride to the mass of water is 1:11-17; and the ratio of the total mass of zinc chloride and magnesium chloride to the mass of magnesium oxide is 1:6-9. The composite magnesium oxychloride bone cement prepared by the application has a suitable setting time, is convenient for clinical operation, has a high compressive strength, meets the strength requirement of dense bone, and can be used for bone repair of load-bearing parts.

The utility model relates to a kind of bone surface liquid suction device, including installation cylinder, be located in the inside of installation cylinder and the liquid suction part of bone surface close, be located on the connecting portion of installation cylinder, connecting portion is equipped with the aspirator that through suction to the liquid suction part is applied negative pressure, aspirator can be inhaled the liquid on bone surface into liquid suction part, the utility model can effectively attract and remove the liquid remaining on contact surface, prevent liquid remaining on bone contact surface, further produce adverse effect to the bonding operation of bone surface, it is favorable to enhance the bonding of bone cement and bone contact surface, avoid the early prosthesis loosening caused by the inadhesive of bone contact surface.