CN116531072A - Titanium-coated vertebral body bridging enhancement system - Google Patents

Titanium-coated vertebral body bridging enhancement system Download PDF

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Publication number
CN116531072A
CN116531072A CN202310714076.XA CN202310714076A CN116531072A CN 116531072 A CN116531072 A CN 116531072A CN 202310714076 A CN202310714076 A CN 202310714076A CN 116531072 A CN116531072 A CN 116531072A
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CN
China
Prior art keywords
screw body
bone cement
head end
screw
vertebral
Prior art date
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Pending
Application number
CN202310714076.XA
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Chinese (zh)
Inventor
蒋晓丰
王佳景
黄鑫祥
程瑞
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Changzhou Geasure Medical Devices Co ltd
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Changzhou Geasure Medical Devices Co ltd
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Application filed by Changzhou Geasure Medical Devices Co ltd filed Critical Changzhou Geasure Medical Devices Co ltd
Priority to CN202310714076.XA priority Critical patent/CN116531072A/en
Publication of CN116531072A publication Critical patent/CN116531072A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7062—Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs ; Tools for such devices
    • A61B17/7064—Devices acting on, attached to, or simulating the effect of, vertebral facets; Tools therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7061—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant for stabilising vertebrae or discs by improving the condition of their tissues, e.g. using implanted medication or fluid exchange
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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, setting implements or the like
    • 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
    • A61B17/8605—Heads, i.e. proximal ends projecting from bone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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, setting implements or the like
    • 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
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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, setting implements or the like
    • 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
    • A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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, setting implements or the like
    • 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
    • A61B17/866—Material or manufacture
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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, setting implements or the like
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Neurology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

The invention discloses a titanium-coated vertebral body bridging reinforcing system, which comprises a screw body, wherein the two ends of the screw body are respectively provided with a head end and a tail end, a bone cement channel is arranged in the screw body, the bone cement channel is arranged along the axial direction of the screw body, a side hole communicated with the bone cement channel is arranged on the peripheral wall of the screw body, external threads are arranged on the peripheral wall of the screw body, the distance between the external threads on the head end of the screw body is smaller than that between the external threads on the other parts, titanium powder is sprayed on the head end of the screw body, and the side hole is obliquely arranged towards the tail end of the screw body. The utility model provides a titanium coating centrum bridging reinforcing system, it can submerge into the centrum completely to keep firm connection with the centrum, can not appear loosening the condition, in addition, above-mentioned titanium coating centrum bridging reinforcing system is after implanting the pedicle of vertebral arch, and its side opening direction no longer faces the centrum to the risk of bone cement infiltration centrum has been greatly reduced.

Description

Titanium-coated vertebral body bridging enhancement system
Technical Field
The invention relates to the field of medical equipment, in particular to a device for treating vertebral compression fracture.
Background
In recent years, with the increasing trend of aging population, the number of patients with osteoporosis is increasing, and when the patients are subjected to slight trauma, the patients are in no obvious symptom period for several months or even years, but after that, symptoms such as pain, kyphosis and the like appear, and the bone fracture of the chest and lumbar vertebra with osteoporosis is called kummell disease, and is in imaging appearance of bone defect in the vertebral body of the spine. kummell disease is mainly clinically manifested as a significant exacerbation of pain in earlier stages, which is manifested by turning over, getting up, standing, walking, vertebral collapse and progressive kyphosis, even nerve function damage, and severely affecting the quality of life of patients. With the continuous aggravation of the aging in China at present, kummell patients are increased year by year, the most main and effective kummell disease treatment mode at present is pvp or pkp, and bone cement is used for filling the diseased vertebrae to fill bone defects and stabilize the spine, so that the treatment effects of relieving pain of patients and correcting kyphosis deformity are achieved.
However, after the patient's vertebrae are filled with bone cement clinically, bone cement displacement often occurs, resulting in failure of surgical treatment, and patients have to receive open revision surgery, while kummell patients are often elderly patients, which often have difficulty in withstanding secondary revision surgery.
Some bone cement screws have appeared on the market at present, and the bone cement is fixed at a specific position in the vertebral body through mechanical combination among the screw, the vertebral body and the bone cement, so that the bone cement is prevented from shifting. However, during the patient's movement, the connection between the screw and the vertebral body becomes unstable, and loosening of the screw may occur.
Most spinal screws do not sink completely into the vertebral body, and this structure may damage the body tissue surrounding the implant, and the patient is prone to foreign body sensation or pain.
As shown in fig. 1, a bone cement channel 2 'is provided inside a conventional screw 1', the bone cement channel 2 'is disposed along the axial direction of the screw 1' and penetrates through both ends of the screw 1', a side hole 3' communicated with the bone cement channel 2 'is provided on the outer peripheral wall of the screw 1', and the side hole 3 'is perpendicular to the bone cement channel 2'. As shown in fig. 2, an included angle a of 15-20 degrees is formed between the pedicle and the sagittal plane of the human body, so that when the screw 1 'is implanted into the vertebral body 4' along the pedicle direction, the screw is deflected by 15-20 degrees towards the direction of the vertebral foramen, and at this time, the direction of the side hole 3 'faces the vertebral foramen, that is, the bone cement coming out of the side hole 3' flows towards the vertebral foramen (bone cement flows into the vertebral body 4 'through the bone cement channel 2', and meanwhile, part of bone cement in the bone cement channel 2 'flows into the vertebral body 4' from the side hole 3 '), and the arrow in the figure indicates the flowing direction of the bone cement coming out of the side hole 3'. The surface of the diseased vertebral body 4 'of the vertebral compression fracture and the inner wall of the vertebral hole are cracked or broken, if the bone cement from the side hole 3' flows towards the vertebral hole, the bone cement can be leaked along the broken position of the inner wall of the vertebral hole and enter the vertebral hole. The central nerve of human body is arranged in the vertebral foramen, and once bone cement is infiltrated, paralysis of a patient can be caused.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the titanium-coated vertebral body bridging enhancement system which can be completely immersed into the vertebral body and stably connected with the vertebral body, and can not loose, in addition, the side hole direction of the titanium-coated vertebral body bridging enhancement system is not oriented to the vertebral hole after the titanium-coated vertebral body bridging enhancement system is implanted into the vertebral pedicle, so that the risk of bone cement infiltration into the vertebral hole is greatly reduced.
The invention discloses a titanium-coated vertebral body bridging reinforcing system, which comprises a screw body, wherein the two ends of the screw body are respectively provided with a head end and a tail end, a bone cement channel is arranged in the screw body, the bone cement channel is arranged along the axial direction of the screw body, the bone cement channel penetrates through the head end and the tail end of the screw body, a side hole communicated with the bone cement channel is formed in the peripheral wall of the screw body, external threads are formed in the peripheral wall of the screw body, the external threads on the peripheral wall of the screw body are arranged along the head end to the tail end, the distance between the external threads on the head end of the screw body is smaller than the distance between the external threads on the other parts, titanium powder is sprayed on the head end of the screw body, and the side hole is obliquely arranged towards the tail end direction of the screw body.
The titanium-coated vertebral body bridging reinforcing system provided by the invention has the advantages that the external threads on the head end of the screw body are double-thread threads, and the external threads of the rest parts of the screw body except the head end are single-thread threads.
The titanium coating vertebral body bridging reinforcing system comprises a screw body, wherein the screw body is provided with a plurality of side holes, the side holes are arranged on the rest part except the head end of the screw body, each group of side holes are provided with a plurality of side holes, the plurality of side holes are arranged along the circumferential direction of the screw body, the plurality of side holes of each group of side holes are arranged along the axial direction of the screw body, and the diameters of the side holes are gradually increased along the direction from the head end to the tail end of the screw body.
The titanium-coated vertebral body bridging reinforcing system provided by the invention has the advantages that the included angle between the axis of the side hole and the axis of the screw body is 70 degrees.
The invention relates to a titanium coating cone bridging reinforcing system, wherein the end face of the head end of a screw body is provided with a butt joint groove communicated with a bone cement channel, the groove wall of the butt joint groove is provided with a plurality of U-shaped grooves, the U-shaped grooves are arranged along the circumferential direction of the screw body, and the inner groove wall of the butt joint groove is provided with internal threads.
The titanium-coated vertebral body bridging enhancement system is different from the prior art in that external threads are arranged on the peripheral wall of the screw body of the titanium-coated vertebral body bridging enhancement system along the head end to the tail end, namely, the whole screw body is spread over the external threads, the external thread spacing on the head end of the screw body is smaller than the external thread spacing of the rest part, namely, the external threads on the head end are denser, the external threads on the rest part are sparser, and titanium powder is sprayed on the head end to form a titanium coating, so that when the screw body is implanted into a vertebral body, the head end of the screw body has better bonding strength with vertebral body cortical bone, thereby ensuring that the screw body is firmly connected with the vertebral body without loose. In addition, the side holes on the screw body are not arranged perpendicular to the bone cement channels as in the prior art, but are obliquely arranged towards the tail end direction of the screw body, so that when bone cement flows out of the side holes after the screw body is implanted into the vertebral body, the bone cement does not flow towards the vertebral holes, and the risk of the bone cement penetrating into the vertebral holes is greatly reduced.
The invention is further described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a prior art screw;
FIG. 2 is a state of the art screw use;
FIG. 3 is a front view of the titanium coated vertebral body bridge enhancement system of the present invention;
FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;
FIG. 5 is a left side view of the titanium coated vertebral body bridge enhancement system of the present invention;
FIG. 6 is a right side view of the titanium coated vertebral body bridge enhancement system of the present invention;
FIG. 7 is a rear view of the titanium coated vertebral body bridge enhancement system of the present invention;
FIG. 8 is a perspective view of a titanium coated vertebral body bridge enhancement system of the present invention;
FIG. 9 is a second perspective view of the titanium coated vertebral body bridge enhancement system of the present invention;
FIG. 10 is a third perspective view of the titanium coated vertebral body bridge reinforcing system of the present invention;
FIG. 11 is a view of the titanium coated vertebral body bridge enhancement system of the present invention in use.
Detailed Description
As shown in fig. 3, and in combination with fig. 4 to 11, the titanium-coated vertebral body bridging reinforcing system of the present invention comprises a screw body 1, wherein two ends of the screw body 1 are respectively provided with a head end 7 and a tail end, the head end 7 is used for being connected with a bone cement injection device, and the tail end is provided with a nail tip for being screwed into a vertebral body 4. The bone cement injection device can screw the screw body 1 into the vertebral body 4 and inject bone cement, and the bone cement injection device is the prior art, and the specific structure and the working principle thereof are not described herein.
The screw body 1 has a cylindrical shape, the head end 7 of which has a diameter greater than the diameter of the remaining portion 8.
As shown in fig. 3, and in combination with fig. 4 to 10, the screw body 1 is provided with a bone cement channel 2, the bone cement channel 2 is arranged along the axial direction of the screw body 1, the bone cement channel 2 penetrates through the head end 7 and the tail end of the screw body 1, a side hole 3 communicated with the bone cement channel 2 is formed in the peripheral wall of the screw body 1, an external thread 6 is formed in the peripheral wall of the screw body 1, the external thread 6 on the peripheral wall of the screw body 1 is arranged along the head end 7 to the tail end, the distance between the external threads 6 on the head end 7 of the screw body 1 is smaller than the distance between the external threads 6 on the rest 8 (i.e. the rest 8 of the screw body 1 except the head end 7), and the side hole 3 is obliquely arranged towards the tail end direction of the screw body 1, specifically: the included angle between the axis of the side hole 3 and the axis of the screw body 1 is 70 degrees.
As shown in fig. 4, the bone cement channel 2 is arranged coaxially with the screw body 1, and the angle between the axis of the side hole 3 and the axis of the screw body 1 is 70 °, i.e. the angle between the axis of the side hole 3 and the axis of the bone cement channel 2 is 70 °. Due to this arrangement, as shown in fig. 11, when the screw body 1 is implanted into the vertebral body 4 in the pedicle direction, the arrangement direction of the side holes 3 is not toward the vertebral foramen, so that the bone cement coming out of the side holes 3 does not flow toward the vertebral foramen when the bone cement is injected (the arrow in fig. 11 indicates the flow direction of the bone cement coming out of the side holes 3), and thus the risk of the bone cement penetrating into the vertebral foramen is greatly reduced.
In injecting bone cement into the screw body 1, bone cement is injected into the vertebral body 4 from two portions of the screw body 1: firstly, since the bone cement channel 2 penetrates the head end 7 and the tail end of the screw body 1, a part of bone cement is injected into the vertebral body 4 along the bone cement channel 2 from the tail end of the screw body 1; and secondly, the other part of bone cement is injected into the vertebral body 4 through the bone cement channel 2 and the side hole 3 in sequence. Since the bone cement flowing out of the tail end of the screw body 1 flows back to the vertebral foramen, the risk of the bone cement penetrating into the vertebral foramen can be reduced as long as the bone cement flowing out of the side hole 3 does not flow towards the direction of the vertebral foramen.
According to the titanium-coated vertebral bridging reinforcing system, the head end 7 of the screw body 1 is sprayed with titanium powder, so that the head end 7 can be grown into bones, and the bonding strength is higher.
The titanium-coated vertebral body bridging enhancement system provided by the invention is characterized in that the external threads 6 on the head end 7 of the screw body 1 are double-thread threads, and the external threads 6 of the rest 8 of the screw body 1 except the head end 7 are single-thread threads. The double-thread is used for combining with the cortical bone part of the vertebral body 4, the single-thread is used for combining with the cancellous bone part of the vertebral body 4, and the thread design can improve the holding force of the screw body 1 in the vertebral body 4 and prevent the screw from shifting. As described above, since the head end 7 of the screw body 1 is sprayed with titanium powder, that is, the double-thread is sprayed with a titanium coating, the holding force of the screw body 1 is further enhanced.
As shown in fig. 3, and in combination with fig. 4 to 10, the titanium coated vertebral body bridging reinforcing system of the present invention, wherein the side holes 3 are provided on the remaining portion 8 of the screw body 1 excluding the head end 7, the side holes 3 are provided in a plurality of groups, each group of side holes 3 is provided with a plurality of side holes 3, the plurality of groups of side holes 3 are arranged along the circumferential direction of the screw body 1, the plurality of side holes 3 of each group of side holes 3 are arranged along the axial direction of the screw body 1, and the aperture of the side holes 3 becomes gradually larger along the direction from the head end 7 to the tail end of the screw body 1.
In this embodiment, the side holes 3 are set into four groups, the four groups of side holes 3 are uniformly arranged along the circumferential direction of the screw body 1, each group of side holes 3 is provided with three side holes 3, and the apertures of the three side holes 3 become gradually larger along the direction from the head end 7 to the tail end of the screw body 1. The above design enables the bone cement to spread more evenly within the vertebral body 4.
As shown in fig. 3, and in combination with fig. 4 to 10, the titanium-coated vertebral body bridging enhancement system of the present invention, wherein the end surface of the head end 7 of the screw body 1 is provided with a docking slot 9 that communicates with the bone cement channel 2, and it can be regarded that the bone cement channel 2 penetrates the head end 7 of the screw body 1 through the docking slot 9. The groove wall of the butt joint groove 9 is provided with a plurality of U-shaped groove openings 5, a plurality of U-shaped groove openings 5 are arranged along the circumferential direction of the screw body 1, and the inner groove wall of the butt joint groove 9 is provided with an inner thread 10. The number of the U-shaped notches 5 is three, and the three U-shaped notches 5 are uniformly arranged along the circumferential direction of the screw body 1. The head end 7 of the screw body 1 is connected with the bone cement injection device through the butt joint groove 9, and the U-shaped notch 5 and the internal thread 10 are specific structures for realizing the connection of the butt joint groove 9 and the bone cement injection device.
The titanium-coated vertebral body bridging enhancement system is different from the prior art in that external threads 6 are arranged on the peripheral wall of the screw body 1 of the titanium-coated vertebral body bridging enhancement system along the head end 7 to the tail end, that is, the whole screw body 1 extends over the external threads 6, the distance between the external threads 6 on the head end 7 of the screw body 1 is smaller than that between the external threads 6 on the other parts 8, that is, the external threads 6 on the head end 7 are denser, the external threads 6 on the other parts 8 are sparser, and titanium powder is sprayed on the head end 7 to form a titanium coating, so that when the screw body 1 is implanted into the vertebral body 4, the head end 7 of the screw body 1 has better bonding strength with cortical bone of the vertebral body 4, thereby ensuring that the screw body 1 is firmly connected with the vertebral body 4 without loosing. In addition, the side hole 3 of the screw body 1 is not arranged perpendicular to the bone cement channel 2 as in the prior art, but is arranged obliquely toward the tail end of the screw body 1, so that when the bone cement flows out of the side hole 3 after the screw body 1 is implanted into the vertebral body 4, the bone cement does not flow toward the vertebral foramen, thereby greatly reducing the risk of the bone cement penetrating into the vertebral foramen.
The invention is made of titanium alloy material, and has the indication of vertebral compression fracture, and is matched with bone cement and a bone cement injection device.
The working principle of the invention is mainly as follows: the mechanical combination of the titanium coating vertebral body bridging reinforcing system, the vertebral body 4 and the bone cement ensures that the bone cement is fixed at a specific position in the vertebral body 4, and the bone cement is prevented from shifting.
The invention has the following advantages:
(1) The invention can be completely immersed into the vertebral body 4 to achieve the effect of zero notch, the peripheral tissues of the screw body 1 can not be damaged, and meanwhile, the patient can not have obvious foreign body sensation;
(2) The invention can inject bone cement after the vertebral body 4 is implanted, the bonding strength of the bone cement and the nail body is higher, and the probability of secondary operation repair can be reduced to a great extent;
(3) According to the invention, by increasing the thread density of the head end 7 and spraying titanium powder, the bonding strength of the screw body 1 and the cone 4 is very high, and the loosening of the screw body 1 is avoided;
(4) The optimization of the structure of the side hole 3 greatly reduces the risk of bone cement penetrating into the vertebral foramen.
It should be noted that, the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "front", "rear", "left", "right", "middle", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.

Claims (5)

1. The utility model provides a titanium coating centrum bridging reinforcing system, includes the screw body, the both ends of screw body are head end and tail end respectively, this internal bone cement passageway that is equipped with of screw, the axial arrangement of bone cement passageway along the screw body, bone cement passageway runs through the head end and the tail end of screw body, be equipped with the side opening with bone cement passageway intercommunication on the periphery wall of screw body, be equipped with the external screw thread on the periphery wall of screw body, its characterized in that: external threads on the outer peripheral wall of the screw body are arranged from the head end to the tail end, the external thread spacing on the head end of the screw body is smaller than the external thread spacing of the rest parts, titanium powder is sprayed on the head end of the screw body, and the side holes are obliquely arranged towards the tail end direction of the screw body.
2. The titanium coated vertebral body bridge reinforcing system of claim 1, wherein: the external threads on the head end of the screw body are double-thread threads, and the external threads of the rest parts of the screw body except the head end are single-thread threads.
3. The titanium coated vertebral body bridge reinforcing system of claim 2, wherein: the side hole is arranged on the rest part of the screw body except the head end, the side holes are arranged into a plurality of groups, each group of side holes are provided with a plurality of side holes, the plurality of groups of side holes are arranged along the circumference of the screw body, the plurality of side holes of each group of side holes are arranged along the axial direction of the screw body, and the aperture of the side hole is gradually increased along the direction from the head end to the tail end of the screw body.
4. The titanium coated vertebral body bridge reinforcing system of claim 3, wherein: the included angle between the axis of the side hole and the axis of the screw body is 70 degrees.
5. The titanium coated vertebral body bridge reinforcing system of claim 4, wherein: the end face of the head end of the screw body is provided with a butt joint groove communicated with the bone cement channel, the groove wall of the butt joint groove is provided with a plurality of U-shaped grooves, the U-shaped grooves are circumferentially arranged along the screw body, and the inner groove wall of the butt joint groove is provided with an inner thread.
CN202310714076.XA 2023-06-15 2023-06-15 Titanium-coated vertebral body bridging enhancement system Pending CN116531072A (en)

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Application Number Priority Date Filing Date Title
CN202310714076.XA CN116531072A (en) 2023-06-15 2023-06-15 Titanium-coated vertebral body bridging enhancement system

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Application Number Priority Date Filing Date Title
CN202310714076.XA CN116531072A (en) 2023-06-15 2023-06-15 Titanium-coated vertebral body bridging enhancement system

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CN116531072A true CN116531072A (en) 2023-08-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118121287A (en) * 2024-05-07 2024-06-04 西安市红会医院（西安市骨科研究所） Centrum reinforcing bridge system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118121287A (en) * 2024-05-07 2024-06-04 西安市红会医院（西安市骨科研究所） Centrum reinforcing bridge system

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