CN113729902A - Pedicle screw, distraction rod, heating rod and pedicle screw system - Google Patents
Pedicle screw, distraction rod, heating rod and pedicle screw system Download PDFInfo
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- CN113729902A CN113729902A CN202111105356.8A CN202111105356A CN113729902A CN 113729902 A CN113729902 A CN 113729902A CN 202111105356 A CN202111105356 A CN 202111105356A CN 113729902 A CN113729902 A CN 113729902A
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- 239000000463 material Substances 0.000 claims description 5
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 5
- 229910001040 Beta-titanium Inorganic materials 0.000 claims description 3
- 229910001257 Nb alloy Inorganic materials 0.000 claims description 3
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
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- 229910052758 niobium Inorganic materials 0.000 claims description 3
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- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 3
- PZQADQWPBJVVGH-UHFFFAOYSA-N niobium titanium zirconium Chemical compound [Ti].[Zr].[Nb] PZQADQWPBJVVGH-UHFFFAOYSA-N 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 238000004132 cross linking Methods 0.000 claims 3
- 208000001132 Osteoporosis Diseases 0.000 abstract description 12
- 239000002639 bone cement Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 7
- 210000000988 bone and bone Anatomy 0.000 description 6
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Classifications
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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
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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
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
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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
- A61B17/7071—Implants for expanding or repairing the vertebral arch or wedged between laminae or pedicles; Tools therefor
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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
- A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
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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
- A61B17/88—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
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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
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
- A61B17/885—Tools for expanding or compacting bones or discs or cavities therein
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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
- A61B2017/564—Methods for bone or joint treatment
Abstract
The invention relates to the technical field of medical instruments, in particular to a pedicle screw, a distraction rod, a heating rod and a pedicle screw system, which comprises a screw part, a distraction part, a screw seat and a locking screw plug, wherein the center of the upper side of the screw part is provided with an installation cavity with an upward opening; the outer side of the upper end of the spreading rod body is provided with a second external thread matched with the second threaded hole; the third one includes the heating rod body, the heating rod body takes the form of cylinder; the fourth one includes left connective bar, right connective bar and four at least two pedicle of vertebral arch screws that the position corresponds, and left connective bar and right connective bar control the interval and set up. The invention has reasonable and compact structure and convenient use, enhances the stability of the pedicle screw under the condition of osteoporosis and prevents the pedicle screw from loosening in the screw channel by arranging the opening part capable of protruding outwards, and has the characteristics of stability, reliability and easy taking out.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a pedicle screw, a distraction rod, a heating rod and a pedicle screw system.
Background
With the increasing aging of the population in China, more and more osteoporosis patients need to perform fixation surgery due to spinal diseases. However, osteoporosis seriously affects the bonding strength of the nail-bone interface, so that the holding force of the screw is reduced, and the screw is often loosened and withdrawn. Therefore, how to effectively improve the stability of the screw and prevent the screw from loosening under the condition of osteoporosis is an urgent problem to be solved in spinal surgery.
To solve the above problems, a great deal of research has been conducted by domestic and foreign scholars, mainly focusing on two aspects of improvement of screw design and strengthening of nail path. In terms of improvements in screw design: (1) increasing the screw diameter risks causing pedicle fractures due to pedicle breakouts; (2) increasing screw length can damage the anterior column of the vertebral body, causing visceral and vascular injury, leading to serious surgical complications. In the aspect of strengthening the nail path, a method for filling a bone cement material into the nail path in a full length mode is mainly adopted clinically at present, and the method has more problems: (1) after the bone cement is filled in the full-length nail channel in a filling manner, the bone cement material is tightly adhered to the full length of the screw, the screw is extremely difficult to take out after the bone cement is solidified, even if the screw is reluctantly screwed out, a large amount of bone defects around the nail channel can be caused, even the root part of the pedicle of vertebral arch and nerve tissues are injured, and serious complications are generated; (2) the traditional filling type bone cement can cause a bone cement interlayer between bone and a screw to form a screw-bone cement-bone secondary interface, good bone integration effect is difficult to form between the interfaces, long-term stability of the screw after operation is affected, the screw is finally inevitably loosened, and great potential safety hazards exist in clinical application; (3) lack of a proper bone cement perfusion device, carelessness in bone cement perfusion can cause partial bone cement to flow into a vertebral canal, and serious complications of nerve injury are caused; (4) there is also a common development of traditional pedicle screw approach augmentation from vertebroplasty, where the augmented bone is mostly an osteoporotic vertebral body part, and no augmentation of the pedicle bone is claimed.
Disclosure of Invention
The invention provides a pedicle screw, a distraction rod, a heating rod and a pedicle screw system, overcomes the defects of the prior art, and can effectively solve the problems that the existing pedicle screw has poor stability under the condition of osteoporosis, is easy to loosen and is difficult to take out after bone cement is injected into a screw channel.
One of the technical schemes of the invention is realized by the following measures: a pedicle screw comprises a screw part, a spreading part, a screw seat and a locking screw plug, wherein an installation cavity with an upward opening is arranged in the center of the upper side of the screw part, at least three installation elongated slots which are communicated from inside to outside are distributed on the outer side of the upper part of the screw part along the circumference, a spreading part with the lower part positioned in the installation cavity is arranged in each installation elongated slot, the spreading part is an elastic body which can be restored to the original shape after being heated, the upper end and the lower end of the spreading part are fixedly installed together with the corresponding positions of the screw part, and gaps are respectively arranged between the two sides of the spreading part and the corresponding positions of the screw part; the upper end of the screw portion is provided with a screw seat, the screw seat is provided with a mounting hole which is communicated up and down, the mounting hole comprises a first threaded hole and a second threaded hole which are sequentially communicated from top to bottom, mounting openings with upward openings are formed in the front side and the rear side of the screw seat corresponding to the position of the first threaded hole, and a locking plug screw is fixedly mounted in the first threaded hole.
The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:
the cross section of the opening part on the vertical plane can be in a right-angle trapezoid with a narrow upper part and a wide lower part.
The material of the opening part can be medical titanium alloy, medical titanium-nickel shape memory alloy, medical high-elasticity beta titanium alloy, medical titanium-zirconium-niobium alloy, medical titanium-based amorphous alloy, medical niobium-based amorphous alloy or medical iron-based amorphous alloy.
The screw portion can be provided with a first external thread on the outer side, the first external thread comprises an upper thread and a lower thread, the thread pitch of the upper thread is smaller than that of the lower thread, and the outer side of the opening portion is provided with a thread consistent with the first external thread.
Four internally and externally communicated mounting elongated slots can be uniformly distributed on the outer side of the upper part of the screw part along the circumference.
The mounting opening may be U-shaped.
The center of the upper end of the locking screw plug can be provided with an inner hexagonal hole.
The second technical scheme of the invention is realized by the following measures: the utility model provides a strut stick with pedicle of vertebral arch screw cooperation use, includes struts excellent body, struts excellent body upper end outside and is equipped with the second external screw thread with second screw hole assorted.
The following is further optimization or/and improvement of the second technical scheme of the invention:
the lower part of the spreading rod body can be in a round table shape with a big top and a small bottom, and the inner side of the spreading part is provided with an arc-shaped groove matched with the lower part of the spreading rod body.
The center of the upper end of the spreading rod body can be provided with an inner hexagonal hole.
The third technical scheme of the invention is realized by the following measures: the utility model provides a heating rod with pedicle of vertebral arch screw cooperation use, includes the heating rod body, and the heating rod body is cylindrically, and the external diameter of heating rod body is less than the aperture of second screw hole.
The fourth technical scheme of the invention is realized by the following measures: the utility model provides an use pedicle of vertebral arch nail system of pedicle of vertebral arch screw, including left connective bar, right connective bar and four at least two pedicle of vertebral arch screws that position corresponds, the interval sets up about left connective bar and the right connective bar, left connective bar middle part outside is equipped with two at least pedicle of vertebral arch screws by preceding to back interval, left connective bar is located the installation opening that corresponds position pedicle of vertebral arch screw, the locking plug screw downside that corresponds the position supports in left connective bar upside corresponding position, right connective bar middle part outside is equipped with two at least pedicle of vertebral arch screws by preceding to back interval, right connective bar is located the installation opening that corresponds position pedicle of vertebral arch screw, the locking plug screw downside that corresponds the position supports in right connective bar upside corresponding position.
The following is further optimization or/and improvement of the fourth technical scheme of the invention:
the aforesaid still can include the cross connection ware, is equipped with the cross connection ware between the left connective bar and the right connective bar that correspond position between every two front and back adjacent pedicle of vertebral arch screws, and the cross connection ware includes left joint piece, right joint piece and horizontal pole, and horizontal pole left end fixed mounting has left joint piece, and left joint piece corresponds the position with the left connective bar outside and installs together, and horizontal pole right-hand member fixed mounting has right joint piece, and right joint piece corresponds the position with the right connective bar outside and installs together.
The invention has reasonable and compact structure and convenient use, and can enhance the stability of the pedicle screw under the condition of osteoporosis and prevent the pedicle screw from loosening in a screw channel by arranging the opening part which can protrude outwards; the distraction part which can be restored to the original state after heating is arranged, so that the problem that the pedicle screws are not easy to take out after bone cement is injected into the screw channel under the condition of osteoporosis is effectively solved, and the pedicle screw retaining device has the characteristics of stability, reliability and easiness in taking out.
Drawings
Fig. 1 is a schematic front view structure diagram of the first embodiment.
Fig. 2 is a front sectional structural view of fig. 1.
FIG. 3 is an enlarged cross-sectional view taken at A-A of FIG. 1.
Fig. 4 is a schematic front sectional structural view of the second embodiment in a use state.
Fig. 5 is an enlarged sectional view at B-B of fig. 4.
Fig. 6 is a schematic sectional structure view of the third embodiment in a front view in a use state.
Fig. 7 is a schematic top view of the fourth embodiment.
The codes in the figures are respectively: 1 is screw portion, 2 is the portion of strutting, 3 is the nail seat, 4 is the locking plug screw, 5 is the installation cavity, 6 is first external screw thread, 7 is the second external screw thread, 8 is the installation opening, 9 is first screw hole, 10 is the second screw hole, 11 is for strutting excellent body, 12 is the arc wall, 13 is the heating rod body, 14 is left joint piece, 15 is right joint piece, 16 is the horizontal pole, 17 is left connective bar, 18 is right connective bar.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described with reference to the following examples and figures:
the first embodiment is as follows: as shown in fig. 1, 2 and 3, the pedicle screw comprises a screw portion 1, a distraction portion 2, a screw seat 3 and a locking screw plug 4, wherein an installation cavity 5 with an upward opening is formed in the center of the upper side of the screw portion 1, at least three installation long grooves which are communicated from inside to outside are distributed on the outer side of the upper portion of the screw portion 1 along the circumference, a distraction portion 2 with the lower portion positioned in the installation cavity 5 is arranged in each installation long groove, the distraction portion 2 is an elastic body which can be restored to the original shape after being heated, the upper end and the lower end of the distraction portion 2 are fixedly installed together with the corresponding positions of the screw portion 1, and gaps are formed between the two sides of the distraction portion 2 and the corresponding positions of the screw portion 1 respectively; the upper end of the screw part 1 is provided with a screw seat 3, the screw seat 3 is provided with a mounting hole which is communicated up and down, the mounting hole comprises a first threaded hole 9 and a second threaded hole 10 which are communicated in sequence from top to bottom, both sides of the screw seat 3 corresponding to the position of the first threaded hole 9 are provided with mounting openings 8 with upward openings, and a locking screw plug 4 is fixedly mounted in the first threaded hole 9. In the using process, the pedicle screws are arranged in the screw channel, the existing known metal rod is inserted into the mounting cavity 5, so that the expansion part 2 is deformed and is ejected outwards, the problems of poor stability and easiness in screw loosening of the pedicle screws under the condition of osteoporosis are effectively solved, the existing known connecting rod capable of connecting a plurality of pedicle screws together is arranged in the mounting notch 8, the locking screw plug 4 is screwed, the lower side of the locking screw plug 4 is abutted against the upper side of the connecting rod, when the pedicle screws need to be removed, the existing known heating rod is inserted into the mounting cavity 5, so that the deformed expansion part 2 is restored to the original shape, and the problem that the pedicle screws are not easy to take out after bone cement is injected into the screw channel under the condition of osteoporosis is effectively solved; through making the portion of strutting 2 both sides respectively with screw portion 1 correspond between the position be equipped with the clearance, not only be convenient for strut portion 2 and take place deformation, can also avoid bone tissue to get into installation cavity 5. According to the requirement, the strutting part 2 is the prior known memory alloy, and the recovery temperature can be between 40 ℃ and 50 ℃; the pedicle screw can be integrally processed and molded by a 3D printing technology (the screw part 1 and the distraction part 2 are made of the same memory alloy); in addition, the number of the long installation grooves can be set according to actual requirements.
The pedicle screw can be further optimized or/and improved according to the actual requirement:
as shown in fig. 1, 2 and 3, the cross section of the spreader portion 2 in the vertical plane is a right trapezoid with a narrow top and a wide bottom. In the use, through such setting, be convenient for make strut portion 2 take place to bulge outward after the deformation.
As shown in fig. 1, 2 and 3, the material of the spreader portion 2 is medical titanium alloy, medical titanium-nickel shape memory alloy, medical high-elasticity beta titanium alloy, medical titanium-zirconium-niobium alloy, medical titanium-based amorphous alloy, medical niobium-based amorphous alloy or medical iron-based amorphous alloy. In the use, through such setting, be convenient for strut portion 2 and resume the former state after the heating to effectively solve the difficult problem of taking out of pedicle of vertebral arch screw after the nail way pours into bone cement into under the osteoporosis condition.
As shown in fig. 1, 2 and 3, the first external thread 6 is arranged on the outer side of the screw portion 1, the first external thread 6 comprises an upper thread and a lower thread, the pitch of the upper thread is smaller than that of the lower thread, and the outer side of the spreading portion is provided with a thread consistent with the first external thread. In the use process, the tensile property of the pedicle screw is enhanced through the arrangement; in addition, by providing the screw thread outside the distracting portion, the anchoring performance of the present embodiment can be enhanced.
As shown in fig. 1, 2 and 3, four long installation slots are uniformly distributed on the outer side of the upper part of the screw part 1 along the circumference and are penetrated inside and outside. In use, with such an arrangement, stability of the pedicle screw in osteoporotic conditions is enhanced and loosening of the pedicle screw within the screw channel is prevented.
As shown in fig. 1, 2 and 3, the mounting notch 8 is U-shaped. In the use, through such setting, the connective bar card of being convenient for connect a plurality of pedicle of vertebral arch screws is gone into installation opening 8, makes connective bar and installation opening 8's arcwall face laminate mutually.
As shown in fig. 1, 2 and 3, an inner hexagonal hole is formed in the center of the upper end of the locking screw plug 4. In the use process, the locking screw plug 4 is arranged through the arrangement, so that the locking screw plug 4 is propped against the connecting rod for connecting a plurality of pedicle screws after being screwed tightly.
Example two: as shown in fig. 4 and 5, the distraction rod 11 used with the pedicle screw comprises a distraction rod body 11, and a second external thread 7 matched with the second threaded hole 10 is arranged on the outer side of the upper end of the distraction rod body 11. In the using process, after the pedicle screw is driven into the screw channel, the distraction part 2 is deformed and is ejected outwards by installing the distraction rod body 11 into the installation cavity 5, so that the problems of poor stability and easiness in screw loosening of the pedicle screw under the condition of osteoporosis are effectively solved; in addition, the distraction rod body 11 can remain in the installation cavity 5 after the distraction part 2 is distracted, thereby enhancing the strength of the pedicle screw and maintaining the distraction state of the distraction part 2.
The spreading rod can be further optimized or/and improved according to the actual requirement:
as shown in fig. 4 and 5, the lower part of the distraction rod body 11 is in a shape of a truncated cone with a large top and a small bottom, and an arc-shaped groove 12 matched with the lower part of the distraction rod body 11 is arranged on the inner side of the distraction part 2. In the use, through such setting, be convenient for make strut portion 2 take place to bulge outward after the deformation.
As shown in fig. 4 and 5, an inner hexagonal hole is formed in the center of the upper end of the spreading rod body 11. In the use, through setting up interior hexagonal hole not only be convenient for pack into or take out installation cavity 5 with strutting excellent body 11, still be convenient for make to strut portion 2 and take place deformation.
Example three: as shown in figure 6, the heating rod used in cooperation with the pedicle screw comprises a heating rod body 13, wherein the heating rod body 13 is cylindrical, and the outer diameter of the heating rod body 13 is smaller than the aperture of the second threaded hole 10. In the using process, the deformed expanding part 2 is restored to the original shape by inserting the heating rod body 13, so that the problem that the pedicle screws are not easy to take out after bone cement is injected into a screw channel under the condition of osteoporosis is effectively solved.
Example four: as shown in the attached drawing 7, the pedicle screw system using the pedicle screws comprises a left connecting rod 17, a right connecting rod 18 and at least four pedicle screws corresponding to every two positions, the left connecting rod 17 and the right connecting rod 18 are arranged at left and right intervals, at least two pedicle screws are arranged on the outer side of the middle part of the left connecting rod 17 from front to back at intervals, the left connecting rod 17 is positioned in an installation opening 8 of the pedicle screws at the corresponding positions, the lower side of a locking screw plug 4 at the corresponding position is abutted against the corresponding position on the upper side of the left connecting rod 17, at least two pedicle screws are arranged on the outer side of the middle part of the right connecting rod 18 from front to back at intervals, the right connecting rod 18 is positioned in the installation opening 8 of the pedicle screw at the corresponding position, and the lower side of the locking screw plug 4 at the corresponding position is abutted against the corresponding position on the upper side of the right connecting rod 18. In use, two pedicle screws are connected together by a left connector rod 17 and two pedicle screws are connected together by a right connector rod 18.
The pedicle screw system can be further optimized or/and improved according to the actual needs:
as shown in the attached figures 1, 2, 3 and 7, the pedicle screw fixing device further comprises a cross connector, the cross connector is arranged between a left connecting rod 17 and a right connecting rod 18 corresponding to the positions between every two adjacent pedicle screws, the cross connector comprises a left clamping block 14, a right clamping block 15 and a transverse rod 16, the left clamping block 14 is fixedly mounted at the left end of the transverse rod 16, the left clamping block 14 and the left connecting rod 17 are mounted at the corresponding positions outside, the right clamping block 15 is fixedly mounted at the right end of the transverse rod 16, and the right clamping block 15 and the right connecting rod 18 are mounted at the corresponding positions outside. In use, the two pedicle screws on the left side and the two pedicle screws on the right side are connected together by a transconnector through two left and right connecting rods 17, 18 arranged in parallel.
The technical feature groups form various embodiments of the invention, and the invention has strong adaptability and implementation effect, and can increase or decrease unnecessary technical features according to actual needs to meet the requirements of different situations.
Claims (10)
1. A pedicle screw is characterized by comprising a screw part, a distraction part, a screw seat and a locking screw plug, wherein an installation cavity with an upward opening is arranged in the center of the upper side of the screw part, at least three internally and externally communicated installation elongated slots are distributed on the outer side of the upper part of the screw part along the circumference, a distraction part with the lower part positioned in the installation cavity is arranged in each installation elongated slot, the distraction part is an elastic body which can be restored to the original shape after being heated, the upper end and the lower end of the distraction part are fixedly installed together with the corresponding positions of the screw part, and gaps are respectively arranged between the two sides of the distraction part and the corresponding positions of the screw part; the upper end of the screw portion is provided with a screw seat, the screw seat is provided with a mounting hole which is communicated up and down, the mounting hole comprises a first threaded hole and a second threaded hole which are sequentially communicated from top to bottom, mounting openings with upward openings are formed in the front side and the rear side of the screw seat corresponding to the position of the first threaded hole, and a locking plug screw is fixedly mounted in the first threaded hole.
2. The pedicle screw according to claim 1, wherein the cross-section of the distracting portion in a vertical plane is a right trapezoid with a narrow top and a wide bottom.
3. The pedicle screw according to claim 1 or 2, wherein the material of the distractor is a medical titanium alloy or a medical titanium-nickel shape memory alloy or a medical high-elasticity beta titanium alloy or a medical titanium-zirconium-niobium alloy or a medical titanium-based amorphous alloy or a medical niobium-based amorphous alloy or a medical iron-based amorphous alloy.
4. The pedicle screw according to claim 1 or 2, wherein the screw portion is externally provided with a first external thread comprising an upper thread and a lower thread, the upper thread having a pitch smaller than that of the lower thread, and the distracting portion is externally provided with a thread corresponding to the first external thread; or/and four internally and externally communicated mounting elongated slots are uniformly distributed on the outer side of the upper part of the screw part along the circumference; or \ and, the mounting opening is U-shaped; or/and an inner hexagonal hole is arranged in the center of the upper end of the locking screw plug.
5. A pedicle screw as claimed in claim 3, wherein the screw portion is externally provided with a first external thread comprising an upper thread and a lower thread, the upper thread having a pitch smaller than that of the lower thread, and the distracting portion is externally provided with a thread corresponding to the first external thread; or/and four internally and externally communicated mounting elongated slots are uniformly distributed on the outer side of the upper part of the screw part along the circumference; or \ and, the mounting opening is U-shaped; or/and an inner hexagonal hole is arranged in the center of the upper end of the locking screw plug.
6. A distraction rod used in combination with the pedicle screw as claimed in any one of claims 2 to 5, comprising a distraction rod body, wherein the outer side of the upper end of the distraction rod body is provided with a second external thread matched with the second threaded hole.
7. The spreading rod according to claim 6, wherein the lower part of the spreading rod body is in a shape of a truncated cone with a large upper part and a small lower part, and an arc-shaped groove matched with the lower part of the spreading rod body is arranged on the inner side of the spreading part; or/and an inner hexagonal hole is arranged in the center of the upper end of the distraction rod body.
8. A heating rod used in cooperation with the pedicle screw as claimed in any one of claims 1 to 5, comprising a heating rod body, wherein the heating rod body is cylindrical, and the outer diameter of the heating rod body is smaller than the bore diameter of the second threaded hole.
9. A pedicle screw system using pedicle screws as claimed in any one of claims 1 to 5, comprising a left connecting rod, a right connecting rod and at least four pedicle screws corresponding to two positions of the left connecting rod and the right connecting rod, wherein the left connecting rod and the right connecting rod are arranged at left and right intervals, at least two pedicle screws are arranged on the outer side of the middle part of the left connecting rod from front to back at intervals, the left connecting rod is arranged in an installation notch of the pedicle screws at the corresponding position, the lower side of a locking screw plug at the corresponding position is abutted against the corresponding position on the upper side of the left connecting rod, at least two pedicle screws are arranged on the outer side of the middle part of the right connecting rod from front to back at intervals, the right pedicle connecting rod is arranged in an installation notch of the pedicle screws at the corresponding position, and the lower side of the locking screw plug at the corresponding position is abutted against the corresponding position on the upper side of the right connecting rod.
10. The pedicle screw system according to claim 9, further comprising a cross-linking device, wherein the cross-linking device is arranged between the left connecting rod and the right connecting rod corresponding to the position between every two adjacent front and back pedicle screws, the cross-linking device comprises a left clamping block, a right clamping block and a cross rod, the left clamping block is fixedly installed at the left end of the cross rod, the left clamping block is installed together with the corresponding position of the outer side of the left connecting rod, the right clamping block is fixedly installed at the right end of the cross rod, and the right clamping block is installed together with the corresponding position of the outer side of the right connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111105356.8A CN113729902A (en) | 2021-09-18 | 2021-09-18 | Pedicle screw, distraction rod, heating rod and pedicle screw system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111105356.8A CN113729902A (en) | 2021-09-18 | 2021-09-18 | Pedicle screw, distraction rod, heating rod and pedicle screw system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113729902A true CN113729902A (en) | 2021-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111105356.8A Pending CN113729902A (en) | 2021-09-18 | 2021-09-18 | Pedicle screw, distraction rod, heating rod and pedicle screw system |
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| Country | Link |
|---|---|
| CN (1) | CN113729902A (en) |
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| CN2907561Y (en) * | 2005-12-15 | 2007-06-06 | 孙海飚 | Anti-loosing pedicle screw |
| US20080071273A1 (en) * | 2006-09-15 | 2008-03-20 | Hawkes David T | Dynamic Pedicle Screw System |
| US20100217266A1 (en) * | 2009-02-23 | 2010-08-26 | Inion Oy | Implant, implantation tool, kit and method |
| CN204049820U (en) * | 2014-08-12 | 2014-12-31 | 深圳市沃尔德外科医疗器械技术有限公司 | Pedicle screw |
| CN205322465U (en) * | 2015-12-01 | 2016-06-22 | 重庆医科大学附属永川医院 | A interior fixing system for lumbar vertebrae slippage resets |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2907561Y (en) * | 2005-12-15 | 2007-06-06 | 孙海飚 | Anti-loosing pedicle screw |
| US20080071273A1 (en) * | 2006-09-15 | 2008-03-20 | Hawkes David T | Dynamic Pedicle Screw System |
| US20100217266A1 (en) * | 2009-02-23 | 2010-08-26 | Inion Oy | Implant, implantation tool, kit and method |
| CN204049820U (en) * | 2014-08-12 | 2014-12-31 | 深圳市沃尔德外科医疗器械技术有限公司 | Pedicle screw |
| CN205322465U (en) * | 2015-12-01 | 2016-06-22 | 重庆医科大学附属永川医院 | A interior fixing system for lumbar vertebrae slippage resets |
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Application publication date: 20211203 |