CN118806402B - Expansion screw capable of being injected into bone cement and injection method thereof - Google Patents
Expansion screw capable of being injected into bone cement and injection method thereof Download PDFInfo
- Publication number
- CN118806402B CN118806402B CN202411073121.9A CN202411073121A CN118806402B CN 118806402 B CN118806402 B CN 118806402B CN 202411073121 A CN202411073121 A CN 202411073121A CN 118806402 B CN118806402 B CN 118806402B
- Authority
- CN
- China
- Prior art keywords
- expansion
- section
- groove
- bone cement
- screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/8802—Equipment for handling bone cement or other fluid fillers
- A61B17/8805—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B2017/8655—Pins or screws or threaded wires; nuts therefor with special features for locking in the bone
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Medical Informatics (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Neurology (AREA)
- Prostheses (AREA)
Abstract
The invention provides an expansion screw capable of being injected with bone cement and an injection method thereof, belonging to the technical field of bone cement injection. The screw comprises a screw head, wherein one end of the screw head is fixedly connected with a threaded rod, the other end of the screw head is provided with a hexagonal groove, a penetrating injection hole is formed in the center of the screw head, the surface of the hexagonal groove is fixedly connected with an injection head communicated with the injection hole, the threaded rod comprises a thread section and an expansion section which are integrally connected, one end of the thread section is provided with an elastic groove communicated with a silica gel sealing ring, and the bottom of the elastic groove is fixedly connected with a sealing structure. According to the invention, after the expansion screw is fixed, bone cement can be directly injected through the screw head and the threaded rod, and the bone cement enters the bone of a patient through the injection structure in the threaded rod, so that the injected bone cement can be effectively decompressed, and the secondary injury of a fracture place caused by excessive pressure of the injected bone cement is avoided.
Description
Technical Field
The invention relates to the technical field of bone cement injection, in particular to an expansion screw capable of being injected with bone cement and an injection method thereof.
Background
Bone cement is a medical material for treating bone fracture and osteoporosis, also called bone cement vertebroplasty, which is generally used to treat vertebral fracture or vertebral collapse due to osteoporosis, and reinforces the vertebral body by injecting a specific type of resin or cement into the vertebral body, thereby reducing pain and restoring stability of the vertebral body.
Bone cement screw is an instrument for fracture treatment, which is a screw made of titanium alloy or stainless steel, which is inserted into bone, and bone cement is injected into bone tissue around the screw using a special needle tube, thereby enhancing the stability of the fracture site.
When the existing old patient is fractured, the bone cement is generally injected for fixation, the bone cement screw is easy to fall off after an operation, the screw is loose, and when the bone cement is injected into the bone cement injector, the condition that the bone cement injection pressure is too high to cause secondary injury of the patient is easy to occur, and meanwhile, the connection is complicated in the adaptation with the bone cement injector, so that the invention provides the expansion screw capable of injecting the bone cement and the injection method thereof to meet the requirements.
Disclosure of Invention
The invention aims to solve the technical problems that when the fracture occurs in the old patient, the existing expansion screw capable of injecting bone cement and the injection method thereof are used for solving the problems that the bone cement is generally injected for fixation, the bone cement screw is easy to fall off after an operation and the screw is loose, when the bone cement is injected into a bone cement injector, the bone cement injection pressure is too high, the patient is damaged secondarily, and meanwhile, the connection is complicated in the adaptation with the bone cement injector.
In order to solve the technical problems, the invention provides the following technical scheme:
The expansion screw capable of injecting bone cement comprises a screw head, wherein one end of the screw head is fixedly connected with a threaded rod, the other end of the screw head is provided with a hexagonal groove, a penetrating injection hole is formed in the center of the screw head, the surface of the hexagonal groove is fixedly connected with an injection head communicated with the injection hole, the threaded rod comprises a threaded section and an expansion section which are integrally connected, one end of the threaded section is provided with an elastic groove communicated with a silica gel sealing ring, the bottom of the elastic groove is fixedly connected with a sealing structure, the outer surface wall of the expansion section is fixedly connected with a plurality of groups of expansion limiting sheets distributed by taking the expansion section as an axis array, and each two expansion limiting sheets which are symmetrical with each other are one group.
Optionally, the injection structure includes the first spread groove of seting up in elastic groove one end, the annular expansion groove has been seted up to the expansion section near the expansion limiting piece inboard, four second spread grooves that are linked together have been seted up between first spread groove and the expansion groove.
Optionally, the expansion limiting piece includes the weakening section and the spacing section that are connected, the weakening section is connected with the exterior wall of expansion section an organic whole, the inner wall of expansion limiting piece is from weakening section to spacing section by thin thick gradual change, expansion tank and expansion limiting piece correspond side inner wall and be curved expansion head, every group two the spacing section interval of expansion limiting piece is 1mm, every two sets of interval between the expansion limiting piece is 1mm, weakening tank has been seted up to the exterior wall of weakening section and expansion section junction, the interior surface wall fixedly connected with a plurality of strengthening rib of first spread groove, the both ends of second spread groove are V style of calligraphy notch, four each other be 90 distributions between the second spread groove.
Optionally, the outer surface wall of the expansion limiting piece is provided with a fastening groove, and the inner surface of the fastening groove is fixedly connected with a fastening piece.
Optionally, the fastening piece is fixed in the first net piece and the second net piece that is fixed in the fastening groove surface in proper order including being fixed in, first net piece and second net piece are fixed in the 1/3 and the 2/3 degree of depth position of fastening groove respectively, a plurality of fastening mouth that the specification is unanimous has all been seted up on the surface of first net piece and second net piece, and the fastening mouth on first net piece and the second net piece is crisscross each other.
Optionally, seal structure is including being fixed in the elastic groove one end's elastic sheet, the top surface fixedly connected with seal hemisphere of elastic sheet, the seal groove has been seted up to the screw head one side surface that is close to the threaded rod, the interior surface wall nest of seal groove is connected with the silica gel sealing washer, through silica gel sealing washer and seal hemisphere cooperation fixed connection between screw head and the threaded rod.
Optionally, the elastic sheet includes plane section, arc section and the support section that are connected, the plane section is cross structure, four ports of plane section are connected with the support section, the one end of support section is connected with the arc section, arc section and elastic groove bottom fixed connection, the spacing adaptation groove with plane section looks adaptation has been seted up to the bottom of sealed hemisphere, the nested installation of plane section is in spacing adaptation inslot.
Optionally, the interior surface wall of injection head is provided with the slip ring, the one end both sides fixedly connected with bracing piece of slip ring, the bottom fixedly connected with stripper plate of bracing piece still includes the gliding extrusion structure of slip ring of being used for adapting.
Optionally, the extrusion structure comprises sliding sheets fixed on two sides of the top end of the sliding ring, a sliding opening corresponding to the sliding sheets is formed in the outer surface wall of the injection head, a sliding groove is formed in the bottom end, close to the sliding opening, of the outer surface wall of the injection head, and the sliding sheets penetrate through the sliding opening and extend to the surface of the sliding groove.
The invention also provides an injection method of the expansion screw capable of being injected into bone cement, which comprises the following steps:
S1, firstly, punching a position on the bone of a patient, which is required to be injected with bone cement;
S2, inserting the expansion section of the threaded rod into a pre-punched hole, and then inserting a screwdriver into the hexagonal groove to screw the rest threaded section into the hole when the expansion section of the threaded rod is inserted into the threaded section, and screwing the whole threaded section into the hole;
S3, screwing an injection head of a bone cement injector for preparing bone cement into the injection head on the screw head, wherein the injection head can continuously drive the sliding sheet to move towards the bottom of the hexagonal groove until the injection head is screwed to a proper position, the displacement of the sliding sheet can drive the sliding ring to move downwards, and then the extrusion plate on the supporting rod is driven to extrude the sealing hemisphere, so that a gap is formed between the sealing hemisphere and the silica gel sealing ring, and bone cement can be injected into the first connecting groove;
S4, bone cement enters the expansion tank from the first connecting tank through the second connecting tank, the expansion tank is filled with the bone cement entering the expansion tank gradually, the bone cement in the expansion tank is extruded to the upper side and the lower side of the expansion tank from the middle position of the expansion head under the action of the expansion head, the weakened section deforms, the bone cement can slowly extrude and expand the limit section to the outside, and the expanded expansion limit piece can be limited in the solidification position of the bone cement, so that the expansion section of the threaded rod is stably limited in the solidified bone cement package;
S5, taking out the injection head after the bone cement injected by the bone cement injector reaches the target quantity.
Compared with the prior art, the invention has at least the following beneficial effects:
In the scheme, the bone cement can be directly injected through the screw head and the threaded rod after being fixed by the expansion screw, and can be effectively decompressed through the injection structure inside the threaded rod into the bone of a patient, so that the injected bone cement is prevented from being excessively stressed, and secondary injury at a fracture place is avoided.
Through setting up seal structure, seal structure can cooperate the bone cement syringe to open when the injection, after the injection finishes, realizes automatic closure, can avoid the overflow of bone cement, prevents that external tissue liquid from entering into in the injection structure.
Through setting up the spacing piece of inflation, the spacing piece of inflation can cooperate to take place deformation in the injection process of bone cement, and the spacing piece of inflation after the expansion can be limited the position in the solidification of bone cement to make the expansion section of threaded rod stably restrict in the bone cement parcel of solidification, realize the inflation spacing, prevent that the threaded rod from taking place the skew to become flexible.
Drawings
The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the disclosure and to enable a person skilled in the pertinent art to make and use the disclosure.
FIG. 1 is a schematic view of a perspective view of an expansion screw capable of injecting bone cement at a first angle;
FIG. 2 is a schematic view of a second perspective view of an expansion screw capable of injecting bone cement;
FIG. 3 is a schematic view of a cut-away view of an expansion screw that can be injected with bone cement;
FIG. 4 is an enlarged perspective view of the structure shown in FIG. 2A;
FIG. 5 is an enlarged perspective view of the structure shown in FIG. 3B;
FIG. 6 is a schematic view of an enlarged perspective view of the injector head and slip ring assembly;
FIG. 7 is an exploded perspective enlarged schematic view of the injector head and slip ring;
FIG. 8 is a schematic view of a multi-view perspective enlarged structure of a seal hemisphere and an elastic sheet assembly;
FIG. 9 is a schematic view of a three-dimensional enlarged structure of a fastening tab;
fig. 10 is an exploded perspective enlarged view of the fastening tab.
[ Reference numerals ]
1. Screw head, 11, hexagonal groove, 12, injection hole, 13, silica gel sealing ring, 2, threaded rod, 21, thread section, 211, elastic groove, 212, first connecting groove, 2121, reinforcing rib, 213, second connecting groove, 22, expansion section, 221, expansion limit piece, 2211, weakening section, 2212, limit section, 222, fastening groove, 223, weakening groove, 224, expansion groove, 2241, expansion head, 3, injection head, 31, sliding opening, 32, sliding groove, 4, sliding ring, 41, sliding sheet, 42, supporting rod, 43, extruding plate, 5, sealing hemisphere, 51, limit adapting groove, 6, elastic piece, 61, plane section, 62, arc section, 63, supporting section, 7, fastening piece, 71, first net piece, 72, second net piece, 73, fastening opening.
While particular structures and devices are shown in the drawings to enable a clear implementation of embodiments of the invention, this is for illustrative purposes only and is not intended to limit the invention to the particular structures, devices and environments, which may be modified or adapted by those of ordinary skill in the art, as desired, and which remain within the scope of the appended claims.
Detailed Description
The present invention provides an expansion screw capable of being injected with bone cement and an injection method thereof, which are described in detail below with reference to the accompanying drawings and specific embodiments. While the invention has been described herein in detail in order to make the embodiments more detailed, the following embodiments are preferred and can be embodied in other forms as well known to those skilled in the art, and the accompanying drawings are only for the purpose of describing the embodiments more specifically and are not intended to limit the invention to the specific forms disclosed herein.
It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the relevant art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
Generally, the terminology may be understood, at least in part, from the use of context. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending at least in part on the context. In addition, the term "based on" may be understood as not necessarily intended to convey an exclusive set of factors, but may instead, depending at least in part on the context, allow for other factors that are not necessarily explicitly described.
It is to be understood that the meaning of "on," "above," "over," and "above" in this disclosure should be read in the broadest manner so that "on" means not only "directly on" something but also includes "on" something with intervening features or layers therebetween, and "on" or "above" means not only "on" or "over" but also may include the meaning of "on" or "over" it without intervening features or layers therebetween.
Furthermore, spatially relative terms such as "under," "below," "lower," "above," "upper," and the like may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented and the spatially relative descriptors used herein may similarly be interpreted accordingly.
As shown in fig. 1 to 3, the embodiment of the invention provides an expansion screw capable of injecting bone cement, which comprises a screw head 1, wherein one end of the screw head 1 is fixedly connected with a threaded rod 2, the other end of the screw head 1 is provided with a hexagonal groove 11, the center position of the screw head 1 is provided with a penetrating injection hole 12, the surface of the hexagonal groove 11 is fixedly connected with an injection head 3 communicated with the injection hole 12, the outer surface wall of the injection head 3 is provided with threads, the injection head can be matched with the injection head of an external bone cement injector, so that the bone cement injector can be directly and detachably connected with the screw head 1 through the injection head 3, the threaded rod 2 comprises a thread section 21 and an expansion section 22 which are integrally connected, the outer ring diameter of the expansion section 22 is smaller than the outer ring diameter of the thread section 21, one end of the thread section 21 is provided with an elastic groove 211 communicated with a silica gel sealing ring 13, the bottom of the elastic groove 211 is fixedly connected with a sealing structure, the outer surface wall of the expansion section 22 is fixedly connected with a plurality of groups of expansion limiting sheets 221 distributed by taking the expansion section 22 as an axis array, each of the two mutually symmetrical expansion limiting sheets 221 are one group, and the expansion limiting sheets 221 are communicated with the injection head 3 and the expansion limiting structures.
When the fracture position of a patient needs to be fixed and bone cement is injected, firstly, the position of the patient bone, which needs to be injected with the bone cement, is perforated, and after perforation, the fracture position is matched and fixed through expansion screws and titanium alloy steel plates. When installing the expansion screw, firstly inserting the expansion section 22 of the threaded rod 2 into the pre-opened hole, then inserting the screw rod into the threaded section 21, inserting the hexagonal groove 11 through the screw driver to screw the rest of the threaded section 21 into the hole, then screwing the injection head of the bone cement injector for preparing the bone cement into the injection head 3 on the screw head 1, extruding the injected bone cement under the pressure of the bone cement injector to open the sealing structure, so that the bone cement can enter the first connecting groove 212, the bone cement entering the first connecting groove 212 enters the expansion groove 224 from the injection structure under the continuous pressure of the bone cement injector, since the spacing between the expansion limiting pieces 221 is small, the expansion limiting pieces 221 can be preferentially filled with the bone cement, the filled bone cement can decompress a plurality of adjacent expansion limiting pieces 221, the expansion limiting pieces 221 can be extruded and unfolded in the decompression process, until the outflow of the bone cement is equal to the pressure between the bone cement injectors, the bone cement flowing out of the gaps of the expansion limiting plates 221 is slowly filled into the bone, the injection quantity of the bone cement is monitored in real time through X-ray irradiation until the injection quantity requirement is met, the injected bone cement is solidified, the expanded expansion limiting plates 221 are further limited and fixed, so that the threaded rod 2 is prevented from loosening, the fracture position of a patient can be effectively fixed through the expansion screw, the injected bone cement can be prevented from seeping into surrounding tissues from the fracture position, meanwhile, the bone cement can be directly injected through the screw head 1 and the threaded rod 2 after fixation, the injected bone cement enters the bone of the patient through the injection structure inside the threaded rod 2, the injected bone cement can be effectively decompressed, the condition that the injected bone cement is excessively high in pressure and secondary injury at the fracture position is avoided, the sealing structure can be matched with the bone cement injector to be opened during injection, and after the injection is completed, the automatic closing is realized, so that the overflow of bone cement can be avoided, and meanwhile, external tissue fluid is prevented from entering the injection structure.
As shown in fig. 3 to 5, the injection structure includes a first connection groove 212 formed at one end of the elastic groove 211, an annular expansion groove 224 is formed inside the expansion section 22 near the expansion limiting piece 221, four second connection grooves 213 are formed between the first connection groove 212 and the expansion groove 224, the expansion limiting piece 221 includes a weakened section 2211 and a limiting section 2212 connected with each other, the weakened section 2211 is integrally connected with the outer surface wall of the expansion section 22, the inner wall of the expansion limiting piece 221 is gradually changed from thin to thick from the weakened section 2211 to the limiting section 2212, the inner wall of the expansion groove 224 and the expansion limiting piece 221 are arc-shaped expansion heads 2241, the spacing interval between each two groups of expansion limiting pieces 221 is 1mm, the outer surface wall of the joint of the weakened section 2211 and the expansion section 22 is formed with a weakened groove 223, the inner surface wall of the first connection groove 212 is fixedly connected with a plurality of reinforcing ribs 2121, the inner surface wall of the reinforcing ribs 2121 can be strengthened, the inner surface wall of the first connection groove 212 is prevented from being broken in the threaded section 21, the second connection grooves 213 are prevented from being broken, and the second connection grooves 213 are distributed in a square shape, and the two ends are stressed in a 90 ° manner.
Bone cement enters the expansion tank 224 from the inside of the first connecting tank 212 through the second connecting tank 213, the bone cement entering the expansion tank 224 gradually fills the expansion tank 224, the bone cement is continuously extruded in the second connecting tank 213 after filling the expansion tank 224, the force in the direction of the second connecting tank 213 is received, the expansion limiting piece 221 is opposite to the expansion head 2241, the expansion head 2241 is arc-shaped, so that the bone cement in the expansion tank 224 is extruded to the upper side and the lower side of the expansion tank 224 from the middle position of the expansion head 2241 under the action of the expansion head 2241, meanwhile, the weakened section 2211 of the expansion limiting piece 221 is only 0.5mm, and the outer surface wall is provided with the weakened groove 223, so that under the house type extrusion force of the bone cement in the expansion tank 224, the weakened section 2211 deforms, the bone cement is gradually extruded and expanded to the outside, the expanded expansion limiting piece 221 is limited in the setting position of the bone cement, so that the expansion section 22 of the threaded rod 2 is stably limited in the setting bone cement, and the loosening and limiting of the threaded rod 2 is prevented.
As shown in fig. 4, 9 and 10, the outer surface wall of the expansion limiting plate 221 is provided with a fastening groove 222, the inner surface of the fastening groove 222 is fixedly connected with a fastening plate 7, the fastening plate 7 comprises a first mesh 71 and a second mesh 72 which are sequentially fixed on the surface of the fastening groove 222, the first mesh 71 and the second mesh 72 are respectively fixed at 1/3 and 2/3 depth positions of the fastening groove 222, the surfaces of the first mesh 71 and the second mesh 72 are provided with a plurality of fastening openings 73 with the same specification, the fastening openings 73 on the first mesh 71 and the second mesh 72 are staggered with each other, when the bone cement overflowed from the expansion section 22 enters into the bone, the bone is gradually filled with the bone, the outside of the expansion section 22 is wrapped, the bone cement wrapped up by the expansion section 22 flows into the first mesh 71 and the second mesh 72 from the fastening groove 222, and then the whole fastening groove 222 is filled with the bone cement, and the solidified bone cement can be tightly and firmly fixed with the fastening groove 222.
As shown in fig. 3 and 8, the sealing structure comprises an elastic sheet 6 fixed at one end of an elastic groove 211, a sealing hemisphere 5 is fixedly connected to the top surface of the elastic sheet 6, a sealing groove is formed in the surface of one side, close to a threaded rod 2, of a screw head 1, a silica gel sealing ring 13 is connected to the inner surface wall of the sealing groove in a nested manner, the screw head 1 and the threaded rod 2 are fixedly connected through the cooperation of the silica gel sealing ring 13 and the sealing hemisphere 5, the elastic sheet 6 comprises a planar section 61, an arc-shaped section 62 and a supporting section 63 which are connected, the planar section 61 is in a cross-shaped structure, the four ports of the planar section 61 are connected with the supporting section 63, one end of the supporting section 63 is connected with the arc-shaped section 62, the thickness of the arc-shaped section 62 is gradually thickened from the middle to the two ends, the arc-shaped section 62 is fixedly connected with the bottom of the elastic groove 211, a limit adapting groove 51 which is adapted to the planar section 61 is adapted is formed in the bottom of the sealing hemisphere 5, and the planar section 61 is nested and installed in the limit adapting groove 51.
The injection head 3, the injection hole 12, the sealing groove and the elastic groove 211 are mutually communicated, the diameter of the inner ring of the silica gel sealing ring 13 is consistent with the diameter of the inner ring of the injection head 3 and the injection hole 12, the diameter of the sealing hemisphere 5 is consistent with the diameter of the elastic groove 211, when the screw head 1 and the threaded rod 2 are connected, the sealing hemisphere 5 can be extruded to the silica gel sealing ring 13 under the elastic action of the elastic sheet 6, thereby the screw head 1 and the threaded rod 2 are sealed through the silica gel sealing ring 13 and the sealing hemisphere 5, the plane section 61 of the elastic sheet 6 is matched with the limit adapting groove 51, the elastic sheet 6 can not deviate in the process of extruding the sealing hemisphere 5, the elastic force is provided through the deformation of the arc section 62, the pressure of the elastic sheet 6 on the sealing hemisphere 5 is more uniform, and meanwhile the elastic sheet 6 is integrally die-cast through a steel plate, and the manufacturing process is simple.
As shown in fig. 3, fig. 6 and fig. 7, the inner surface wall of the injection head 3 is provided with a sliding ring 4, two sides of one end of the sliding ring 4 are fixedly connected with a supporting rod 42, the bottom end of the supporting rod 42 is fixedly connected with a squeezing plate 43, the injection head further comprises a squeezing structure for adapting the sliding ring 4 to slide, the squeezing structure comprises a sliding plate 41 fixed on two sides of the top end of the sliding ring 4, the outer surface wall of the injection head 3 is provided with a sliding opening 31 corresponding to the sliding plate 41, the outer surface wall of the injection head 3 is close to the bottom end of the sliding opening 31 and is provided with a sliding groove 32, one end of the sliding plate 41 is of a U-shaped structure adapting to the sliding opening 31, the other end of the sliding plate 41 is of an L-shaped structure perpendicular to the sliding groove 32, the sliding plate 41 penetrates through the sliding opening 31, the outer ring diameter of the sliding ring 4 is consistent with the inner ring diameter of the injection head 3, the sliding ring 4 is nested on the inner surface of the sliding ring 3, the squeezing plate 43 is connected with the surface of the sealing hemisphere 5, when the initial position is reached, the L-shaped end of the sliding plate 41 is consistent with the sliding plate 11 bottom surface spacing of the sliding plate 31, when the outer bone injector 3 is close to the bottom of the sliding plate 31, the sliding plate is screwed into the sealing hemisphere 11, the sealing ring 13 is screwed into the sealing ring 5, the sealing ring 5 is screwed down in the sealing ring 13, the sliding plate 41 is driven by the sealing ring is screwed down to the sealing ring 5, the sealing ring 13 is screwed down the sealing ring 13, the sealing ring is screwed down to the sealing ring 13, and then screwed down the sealing ring is screwed down the sealing ring 13, the sealing ring is screwed down the sealing ring 5, and the sealing ring is screwed down the sealing ring 13, and the sealing ring is screwed down with the sealing ring and the sealing ring 5, while restoring the slide 41 to the original position.
The invention also provides an injection method of the expansion screw capable of being injected into bone cement, which comprises the following steps:
S1, firstly, punching a position on the bone of a patient, which is required to be injected with bone cement;
S2, inserting the expansion section 22 of the threaded rod 2 into the pre-punched hole, and then inserting the expansion section into the threaded section 21, inserting a screw driver into the hexagonal groove 11 to screw the rest of the threaded section 21 into the hole, and screwing the whole threaded section 21 into the hole.
S3, screwing an injection head of the bone cement injector for preparing the bone cement into the injection head 3 on the screw head 1, wherein the injection head continuously drives the sliding sheet 41 to move towards the bottom of the hexagonal groove 11 until the injection head is screwed to be proper, the sliding sheet 41 is displaced to drive the sliding ring 4 to move downwards, and then the extrusion plate 43 on the support rod 42 is driven to extrude the sealing hemisphere 5, so that a gap is formed between the sealing hemisphere 5 and the silica gel sealing ring 13, and the bone cement can be injected into the first connecting groove 212.
S4, bone cement enters the expansion tank 224 from the inside of the first connecting tank 212 through the second connecting tank 213, the bone cement entering the expansion tank 224 gradually fills the expansion tank 224, the bone cement inside the expansion tank 224 is extruded to the upper side and the lower side of the expansion tank 224 from the middle position of the expansion head 2241 under the action of the expansion head 2241, the weakened section 2211 deforms, the bone cement can slowly extrude and expand the limit section 2212 to the outside, and the expanded expansion limit piece 221 can be limited in the solidification of the bone cement, so that the expansion section 22 of the threaded rod 2 is stably limited in the solidified bone cement package.
S5, taking out the injection head after the bone cement injected by the bone cement injector reaches the target quantity.
According to the technical scheme provided by the invention, after the expansion screw is fixed, the bone cement can be directly injected through the screw head and the threaded rod, the bone cement does not need to be perforated again, the bone cement enters the bone of a patient through the injection structure in the threaded rod, the injection structure can effectively relieve the pressure of the injected bone cement, and the situation that the injected bone cement is excessively high in pressure and causes secondary injury in a fracture place is avoided.
Through setting up seal structure, seal structure can cooperate the bone cement syringe to open when the injection, after the injection finishes, realizes automatic closure, can avoid the overflow of bone cement, prevents that external tissue liquid from entering into in the injection structure.
Through setting up the spacing piece of inflation, the spacing piece of inflation can cooperate to take place deformation in the injection process of bone cement, and the spacing piece of inflation after the expansion can be limited the position in the solidification of bone cement to make the expansion section of threaded rod stably restrict in the bone cement parcel of solidification, realize the inflation spacing, prevent that the threaded rod from taking place the skew to become flexible.
The invention is intended to cover any alternatives, modifications, equivalents, and variations that fall within the spirit and scope of the invention. In the following description of preferred embodiments of the invention, specific details are set forth in order to provide a thorough understanding of the invention, and the invention will be fully understood to those skilled in the art without such details. In other instances, well-known methods, procedures, flows, components, circuits, and the like have not been described in detail so as not to unnecessarily obscure aspects of the present invention.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (8)
1. The expansion screw capable of injecting bone cement is characterized by comprising a screw head, wherein one end of the screw head is fixedly connected with a threaded rod, the other end of the screw head is provided with a hexagonal groove, and a penetrating injection hole is formed in the center of the screw head;
The surface of the hexagonal groove is fixedly connected with an injection head communicated with the injection hole, the threaded rod comprises a threaded section and an expansion section which are integrally connected, an elastic groove communicated with a silica gel sealing ring is formed at one end of the threaded section, the bottom of the elastic groove is fixedly connected with a sealing structure, the outer surface wall of the expansion section is fixedly connected with a plurality of groups of expansion limiting sheets which are distributed by taking the expansion section as an axis array, and each two expansion limiting sheets which are symmetrical to each other are one group;
the injection structure is used for communicating the injection head with the expansion limiting piece;
The injection structure comprises a first connecting groove arranged at one end of the elastic groove, an annular expansion groove is arranged at the inner side of the expansion section close to the expansion limiting piece, and four second connecting grooves which are communicated are arranged between the first connecting groove and the expansion groove;
The expansion limiting piece comprises a weakening section and a limiting section which are connected, the weakening section is integrally connected with the outer surface wall of the expansion section, the inner wall of the expansion limiting piece gradually changes from thin to thick from the weakening section to the limiting section, the side inner wall corresponding to the expansion limiting piece of the expansion groove is an arc-shaped expansion head, the outer surface wall of the joint of the weakening section and the expansion section is provided with a weakening groove, the inner surface wall of the first connecting groove is fixedly connected with a plurality of reinforcing ribs, the two ends of the second connecting groove are V-shaped notch, and the four second connecting grooves are mutually distributed at 90 degrees.
2. The bone cement-injectable expansion screw according to claim 1, wherein the spacing interval between each two expansion-limiting pieces is 1mm, and the spacing between each two expansion-limiting pieces is 1mm.
3. The expansion screw capable of being injected with bone cement according to claim 1, wherein the outer surface wall of the expansion limiting piece is provided with a fastening groove, and the inner surface of the fastening groove is fixedly connected with a fastening piece.
4. The bone cement-injectable expansion screw according to claim 3, wherein the fastening sheet comprises a first mesh and a second mesh which are fixed on the surface of the fastening groove in sequence, the first mesh and the second mesh are respectively fixed at 1/3 and 2/3 depth positions of the fastening groove, a plurality of fastening openings with the same specification are formed on the surfaces of the first mesh and the second mesh, and the fastening openings on the first mesh and the second mesh are staggered with each other.
5. The expansion screw capable of being filled with bone cement according to claim 1, wherein the sealing structure comprises an elastic sheet fixed at one end of the elastic groove, a sealing hemisphere is fixedly connected to the top surface of the elastic sheet, a sealing groove is formed in the surface of one side, close to the threaded rod, of the screw head, a silica gel sealing ring is connected to the inner surface wall of the sealing groove in a nested mode, and the screw head is fixedly connected with the threaded rod through the cooperation of the silica gel sealing ring and the sealing hemisphere.
6. The expansion screw capable of injecting bone cement according to claim 5, wherein the elastic sheet comprises a plane section, an arc section and a supporting section which are connected, the plane section is of a cross-shaped structure, four ports of the plane section are connected with the supporting section, one end of the supporting section is connected with the arc section, the arc section is fixedly connected with the bottom of the elastic groove, a limit adapting groove matched with the plane section is formed in the bottom of the sealing hemisphere, and the plane section is nested and installed in the limit adapting groove.
7. The expansion screw capable of injecting bone cement according to claim 1, wherein the inner surface wall of the injection head is provided with a sliding ring, two sides of one end of the sliding ring are fixedly connected with supporting rods, the bottom ends of the supporting rods are fixedly connected with extrusion plates, and the expansion screw further comprises an extrusion structure for adapting the sliding ring to slide.
8. The expansion screw according to claim 7, wherein the extruding structure comprises sliding sheets fixed on two sides of the top end of the sliding ring, the outer surface wall of the injecting head is provided with a sliding opening corresponding to the sliding sheets, the bottom end of the outer surface wall of the injecting head, which is close to the sliding opening, is provided with a sliding groove, and the sliding sheets extend to the surface of the sliding groove through the sliding opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411073121.9A CN118806402B (en) | 2024-08-06 | 2024-08-06 | Expansion screw capable of being injected into bone cement and injection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411073121.9A CN118806402B (en) | 2024-08-06 | 2024-08-06 | Expansion screw capable of being injected into bone cement and injection method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118806402A CN118806402A (en) | 2024-10-22 |
| CN118806402B true CN118806402B (en) | 2025-01-10 |
Family
ID=93068432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411073121.9A Active CN118806402B (en) | 2024-08-06 | 2024-08-06 | Expansion screw capable of being injected into bone cement and injection method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118806402B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN213554339U (en) * | 2020-09-29 | 2021-06-29 | 南通市第一人民医院 | Contrast agent injection equipment for interventional department |
| CN117694987A (en) * | 2023-12-26 | 2024-03-15 | 南京市江宁医院 | Bone cement set screw and bone cement injection device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT97563B (en) * | 1917-02-26 | 1924-07-25 | Rene Duquesne | Pipe connection with automatic closure. |
| CN102824207B (en) * | 2011-06-16 | 2015-03-25 | 北京爱康宜诚医疗器材股份有限公司 | Support body in expansion fixing whirlbone |
| US9326801B2 (en) * | 2013-01-08 | 2016-05-03 | Nicholas Poulos | Fenestrated bone screw and method of injecting bone cement into bone structure |
| CN207590747U (en) * | 2017-05-23 | 2018-07-10 | 温州医科大学附属第二医院、温州医科大学附属育英儿童医院 | One kind remedies fixing device for spinal pedicle broken wall |
| CN110478017A (en) * | 2019-07-30 | 2019-11-22 | 张家港市中医医院 | A kind of pedicle screw fixing means |
| KR102342948B1 (en) * | 2019-12-30 | 2021-12-24 | 주식회사 엔닥 | Bone fixation screw with expansion and restoration |
| CN111938799B (en) * | 2020-08-28 | 2022-05-20 | 浙江科惠医疗器械股份有限公司 | Bone cement injection device capable of preventing bone cement leakage |
| CN216933425U (en) * | 2021-12-02 | 2022-07-12 | 上海市东方医院（同济大学附属东方医院） | A vertebral body expandable balloon stent into the form of bone cement pedicle screw |
| CN218870438U (en) * | 2022-05-17 | 2023-04-18 | 天津市天津医院 | Integrated distractable pedicle screw system |
| CN221357101U (en) * | 2023-08-31 | 2024-07-19 | 陈波涛 | Distractable screw system for preventing formed bone cement of vertebral body from loosening and falling off |
-
2024
- 2024-08-06 CN CN202411073121.9A patent/CN118806402B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN213554339U (en) * | 2020-09-29 | 2021-06-29 | 南通市第一人民医院 | Contrast agent injection equipment for interventional department |
| CN117694987A (en) * | 2023-12-26 | 2024-03-15 | 南京市江宁医院 | Bone cement set screw and bone cement injection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118806402A (en) | 2024-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69716471T2 (en) | MOLDED MEMORY TECHNOLOGY USING MULTI-ANGLE BONE SCREW ARRANGEMENT | |
| EP2299921B1 (en) | Posterior spinal fastener | |
| EP1832241B1 (en) | Stabilising device for bones with a bone anchoring element | |
| US7717947B1 (en) | Bone screw | |
| US20050021084A1 (en) | Bone treatment device and method | |
| EP1920722B1 (en) | Bone anchoring nail | |
| US10499969B2 (en) | Bone fixation screw with deployable anchors | |
| KR101239453B1 (en) | Device for the cement augmentation of bone implants | |
| US20160278830A1 (en) | Reinforced cannulated implant system and method | |
| US10405890B2 (en) | Helical bone fixation device | |
| US20230301695A1 (en) | Expandable implant, implant system, kit of parts for assembling an expandable implant, and method of placing an implant in a bone | |
| US20070191844A1 (en) | In-series, dual locking mechanism device | |
| EP3323363A1 (en) | Screw anchor assembly | |
| CN118806402B (en) | Expansion screw capable of being injected into bone cement and injection method thereof | |
| KR100563138B1 (en) | Pedicle screw | |
| CN201958990U (en) | Hollow U-shaped nail device capable of injecting bone cement | |
| CN102018564B (en) | Hollow U-shaped nail device capable of injecting bone cement | |
| CN213217554U (en) | Vertebral body implant and vertebral body implantation system | |
| KR101336739B1 (en) | Poly Hole Screw for Injecting Bone Cement | |
| CN106361423A (en) | Minimally invasive transpedicular bone grafting supporting nail | |
| DE102023102881B4 (en) | cervical cage | |
| CA3149258A1 (en) | Fluid delivery system | |
| CN111616787B (en) | Prestress anti-back bone screw assembly | |
| EP2438868B1 (en) | Vertebra filler | |
| DE10351978A1 (en) | Bone fixing unit e.g. bone screw, for stabilizing device, has shaft provided with elastic sections, and head formed to connect rod with unit that receives axial force due to elastic sections toward shaft axis and bending and torsion forces |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |