CN114027961A - Hollow screw for guiding implantable filler - Google Patents
Hollow screw for guiding implantable filler Download PDFInfo
- Publication number
- CN114027961A CN114027961A CN202111277316.1A CN202111277316A CN114027961A CN 114027961 A CN114027961 A CN 114027961A CN 202111277316 A CN202111277316 A CN 202111277316A CN 114027961 A CN114027961 A CN 114027961A
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- screw
- section
- filler
- tail
- implantable
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- 239000000945 filler Substances 0.000 title claims abstract description 50
- 238000002513 implantation Methods 0.000 claims abstract description 33
- 239000007943 implant Substances 0.000 claims abstract description 15
- 241001079814 Symphyotrichum pilosum Species 0.000 claims abstract description 10
- 235000004224 Typha angustifolia Nutrition 0.000 claims abstract description 10
- 239000002639 bone cement Substances 0.000 claims abstract description 6
- 210000000988 bone and bone Anatomy 0.000 claims description 12
- 238000010079 rubber tapping Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 238000011084 recovery Methods 0.000 abstract description 8
- 206010020649 Hyperkeratosis Diseases 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 208000010392 Bone Fractures Diseases 0.000 description 42
- 206010017076 Fracture Diseases 0.000 description 42
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 208000024779 Comminuted Fractures Diseases 0.000 description 1
- 206010010214 Compression fracture Diseases 0.000 description 1
- 208000001132 Osteoporosis Diseases 0.000 description 1
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 206010041541 Spinal compression fracture Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001054 cortical effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- 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
- A61B17/88—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, 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
- 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)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Neurology (AREA)
- Surgical Instruments (AREA)
Abstract
The invention provides a guiding hollow screw capable of implanting fillers, which comprises a screw body, wherein a guiding hole is arranged in the screw body, is coaxially arranged with the screw body and has nonuniform diameter; the guide hole is used for positioning the implant screw body through the guide wire; the screw body comprises a screw rod and a screw tail, the screw tail is connected with the tail end of the screw rod, and a first thread is arranged at the head end of the screw rod and used for rotatably implanting the screw body; the side wall of the nail rod is provided with an implantation hole which is communicated with the guide hole; after the hollow screw is implanted into the fixed fracture part, filler can be implanted through the guide hole and the implantation hole to close the fracture gap. The hollow screw provided by the invention can not only meet the pressurizing internal fixing function of the conventional hollow screw, but also implant fillers such as bone cement into a large fracture gap which cannot be closed through the implantation hole, so that the fracture gap is closed, callus formation is induced, and the closing and recovery of the fracture gap are promoted.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a hollow screw for a guiding implantable filler.
Background
Fracture refers to the interruption of the integrity and continuity of human skeleton, which makes the skeleton lose its own support and movement effects on human body. With the development of aging population and the increasingly developed traffic of the current society, the number of fracture patients in the elderly is increasing day by day, and fractures occur in young and strong years. Fractures are generally caused by sudden external forces, such as falls, falls from high places, traffic accidents and the like, and some patients have fractures due to osteoporosis and long-term accumulated strain.
If the fracture condition is serious, for example, comminuted fracture, spiral fracture, compression fracture and burst fracture occur, in the process of surgical reduction, bone fragments move frequently, so that the condition that the bone seam can not be closed occurs. If the fracture gap is not more than about 3mm, the gap is filled with blood in the later period, fibers are formed after the blood is organized, and original callus is formed in the later period, so that the restoration and closure of the fracture gap are promoted. If the fracture gap is larger than 3mm or even larger, the slow growth of fibrous connection and original callus at the fracture part can be caused, and the callus can not be formed, so that the fracture recovery is influenced.
If a large fracture gap can be filled with fillers such as bone cement in the process of surgical reduction, the closing and recovery of the fracture gap can be promoted, but the filling before the internal fixation of the fracture part affects the operation of the internal fixation and the fillers cannot be well arranged; after internal fixation of the fracture, it is not possible to implant a filler into the internal bone fracture. Therefore, no method or apparatus is currently available in the clinic to fill and close the remaining bone fracture after fracture reduction.
Disclosure of Invention
The present invention addresses the deficiencies of the prior art by providing a guided implantable filler cannulated screw.
The invention adopts the following technical scheme for solving the technical problems:
the invention provides a guiding hollow screw capable of implanting fillers, which comprises a screw body, wherein a guiding hole is arranged in the screw body, is coaxially arranged with the screw body and has nonuniform diameter; the guide hole is used for positioning the implant screw body through the guide pin;
the screw body comprises a screw rod and a screw tail, the screw tail is connected with the tail end of the screw rod, and a first thread is arranged at the head end of the screw rod and used for rotatably implanting the screw body;
the side wall of the nail rod is provided with an implantation hole which is communicated with the guide hole; after the hollow screw is implanted into the fixed fracture part, filler can be implanted through the guide hole and the implantation hole to close the fracture gap.
Further, the guide hole includes:
the first section is arranged in one part of the head end of the nail rod; and
the second section is arranged in one part of the tail end of the nail rod;
the diameter of the first section is smaller than that of the second section; the implant hole is in communication with the second segment and is located at a junction of the first segment and the second segment.
Further, the filler may pass through the second section and the implant hole, but may not pass through the first section;
the lead may pass through the first segment and the second segment.
Furthermore, the guide hole also comprises a nail tail section which is arranged in the nail tail; the diameter of the tail section of the nail is larger than that of the second section.
Further, the section of a part of the tail end of the nail tail section is in a regular hexagon or plum blossom shape.
Further, the tail section and the second section are connected by a tapered section.
Furthermore, the second section is connected with the implantation hole through a curved section, and the connecting surface is a smooth continuous curved surface.
Further, the head end of the nail rod is provided with a self-tapping groove.
Further, a second thread is arranged on the nail tail; the pitch of the first thread is greater than the pitch of the second thread.
Further, the filler is selected from one or more of bone cement particle bone and cancellous bone.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:
after the hollow screw is implanted, under the auxiliary positioning of X-ray transmission, the filler can be implanted into a fracture gap nearby the hollow screw through the second section of the guide hole and the implantation hole, so that the larger fracture gap is filled, the closing and the recovery of a fracture seam are facilitated, after the hollow screw is positioned, the filler can not pass through the first section by blocking the tail end of the first section and can only pass through the second section and the implantation hole, and the guide implantation of the filler after the fracture internal fixation is realized; the tail of the screw is also provided with a pressurizing thread which can be screwed into a bone surface for pressurizing and fixing after the screw is implanted, thereby being beneficial to the recovery of fracture; the head end of the hollow screw is provided with a self-tapping groove, which is beneficial to drilling and implanting of the hollow screw. The implantable filler hollow screw provided by the invention can not only meet the pressurizing internal fixation function of the conventional hollow screw, but also implant fillers such as bone cement into a large fracture gap which cannot be closed through the implantation hole, so that the fracture gap is closed, callus formation is induced, the closure and recovery of the fracture gap are promoted, and the occurrence of complications such as poor fracture recovery or abnormal recovery is avoided.
Drawings
FIG. 1 is a cross-sectional view of a guided implantable filler cannulated screw according to one embodiment of the present invention;
FIG. 2 is a cross-sectional view of a guided implantable filler cannulated screw according to one embodiment of the present invention;
FIG. 3 is a front view of a guided implantable filler cannulated screw according to one embodiment of the present invention;
FIG. 4 is a schematic view of the tail end of a cannulated screw for guiding an implantable filler provided in accordance with an embodiment of the present invention;
wherein the reference numerals are: 10-screw body, 11-screw rod, 111-first thread, 112-self-tapping groove, 12-screw tail, 121-second thread, 20-guide hole, 21-first section, 22-second section, 23-screw tail section, 24-curved surface section and 30-implantation hole.
Detailed Description
The present invention provides a guided implantable filler cannulated screw, the technical solution of which is described in further detail below in connection with the accompanying drawings to facilitate a better understanding of the present invention, but not to limit the scope of the invention.
As shown in figures 1-3, the invention provides a guiding hollow screw for implantable filler, which comprises a screw body 10, wherein a guiding hole 20 is arranged in the screw body 10 and is coaxial with the screw body 10. Like other cannulated screws of the prior art, the guide hole 20 is used to pass through the guide pin and position the implant screw body 10 through the guide pin for cannulated screw implantation and internal fixation of the fracture.
The screw body 10 provided by the invention comprises a screw rod 11 and a screw tail 12, wherein the screw tail 12 is connected with the tail end of the screw rod 11, and the head end of the screw rod 11 is provided with a first thread 111 for being implanted into a bone in a rotating way.
The side wall of the nail rod is provided with an implantation hole 30, and the implantation hole 30 is communicated with the guide hole 20; after the hollow screw is implanted into the fixed fracture, filler can be implanted through the guide hole 20 and the implantation hole 30 to close the fracture gap. The filler is introduced into the guide hole 20 through the tail end of the guide hole 20, then the filler is pushed in through the guide hole 20, and the filler is pushed out from the side wall of the nail shank 11 through the implantation hole 30 and enters the existing fracture gap after the fracture reduction, so that the fracture gap is filled and closed.
In order to prevent the filler from being difficult to enter the implant hole 30 and enter the head end of the guide hole 20 during the process of pushing the filler through the guide hole 20, the diameter of the guide hole 20 in the implantable filler cannulated screw provided by the present invention is not uniform. Specifically, the pilot hole 20 includes a first section 21 and a second section 22. The first section 21 is arranged in a part of the head end of the nail shank 11; the second section 22 is disposed within a portion of the tail end of the shank. The first section 21 and the second section 22 are in communication and together form the guide bore 20 in the portion of the shank 11.
Wherein the diameter of the first section 21 is smaller than the diameter of the second section 22; implant hole 30 is in communication with second segment 22 and is located at the junction of first segment 21 and second segment 22. The trailing end of the first section 21 is plugged after positioning by means of a metal plug or rubber plug or the like so that the filler can pass through the second section 22 and the implantation hole 30 but not through the first section 21. The lead may pass through the first segment 21 and the second segment 22. The diameter of the first section 21 is slightly larger than that of the guide pin, so that the guide pin can pass through, and the hollow screw and the guide pin are coaxial and do not deflect when the hollow screw is rotationally implanted into the hollow screw through the guide pin as far as possible, so that the accuracy of the implantation angle of the hollow screw can be ensured.
The guide hole 20 also comprises a nail tail section 23 which is arranged in the nail tail 12; the tail section 23 has a diameter greater than that of the second section 22 and is connected to the second section 22 by a tapered section. Correspondingly, the nail tail 12 and the nail rod 11 are also connected through a conical section, and the diameter of the connecting part of the nail tail 12 and the nail rod 11 is gradually reduced instead of suddenly reduced.
As shown in FIG. 4, a portion of the tail end of the tail section 23 has a regular hexagonal or quincunx cross-section for rotatably implanting the screw body 10.
As shown in Figs. 1 and 2, the second section 22 is connected to the implantation hole 30 by a curved section 24, which is a smooth continuous curve, i.e., the head end of the second section 22 is gradually curved toward the side wall to form the implantation hole 30. The filler material may enter implant hole 30 through second section 22 and curved section 24, the curved surface facilitating movement of the filler material and avoiding jamming.
In a preferred embodiment of the invention, the sides of the nail tail 12 are smooth (see fig. 1).
In a preferred embodiment of the present invention, the nail tail 12 is provided with a second thread 121 (see fig. 2 and 3), and the pitch of the first thread 111 is greater than that of the second thread 121, so that when the screw body 10 is screwed into most of the bone, the nail tail 12 can be screwed into the cortical bone through the second thread 121, thereby improving the anti-pullout capability of the screw. The first thread 111 has a larger pitch than the second thread 121, so that the screw body 10 can be completely screwed in to exert a pressing effect, and the screw can be more stably fixed.
As shown in fig. 3, the head end of the screw rod 11 is provided with a self-tapping slot 112, so that the screw body 10 can be screwed in without tapping by using a guide pin, the hollow screw can be used more conveniently, and the operation efficiency is improved.
In a preferred embodiment of the present invention, the filler is selected from one or more of bone cement, bone particles, and cancellous bone.
It can be seen that the implantation hole 30 is arranged at one side of the screw rod 11, and in the screwing-in process, the implantation hole 30 needs to be ensured to be close to the fracture gap existing after the fracture reduction, so that the screw body 10 needs to be implanted under the assistance of the X-ray operation visual field, and after the screw body is implanted, even if a certain error exists between the position of the implantation hole 30 and the position of the fracture gap, the screw body 10 is further rotated according to the error to ensure that the implantation hole 30 is just opposite to the fracture gap, the adjustment error can be adjusted only by rotating the screw body 10 for half a turn at most, and the fixation of the hollow screw cannot be influenced.
In addition, the skilled person can set the lengths of the first section 21 and the second section 22 of the guiding hole 20 according to the requirement, and adjust the position of the implantation hole 30 on the nail shank 11 in a matching way, so that the implantation hole 30 can be positioned in fracture gaps with different depths under different fracture conditions of different patients after the hollow screw is implanted. Similarly, those skilled in the art can design the screw body 10 into different sizes to match the screw body 10 with the implant holes 30 at different positions, so as to correspond to the fracture gaps with different filling depths.
In order to confirm the position of the implantation hole 30 during the process of implanting the cannulated screw, a developing component, such as a developing ring which can be developed under X-ray, may be further disposed on the nail shank 11 near the implantation hole 30 to assist in determining the depth and angle of the implantation hole 30, so as to cooperate with further screwing in the cannulated screw, so that the implantation hole 30 can be close to the fracture gap, and the filler can enter the fracture gap.
The embodiments of the present invention have been described in detail, but the embodiments are merely examples, and the present invention is not limited to the embodiments described above. Any equivalent modifications or alterations to this practice will occur to those skilled in the art and are intended to be within the scope of this invention. Accordingly, equivalent changes and modifications made without departing from the spirit and scope of the present invention should be covered by the present invention.
Claims (10)
1. A guided implantable filler cannulation screw, comprising a screw body (10), wherein a guide hole (20) is formed in the screw body (10), and wherein the guide hole (20) is coaxially arranged with the screw body (10) and has a non-uniform diameter; the guide hole (20) is used for positioning and implanting the screw body (10) through a guide wire;
the screw body (10) comprises a screw rod (11) and a screw tail (12), the screw tail (12) is connected to the tail end of the screw rod (11), and a first thread (111) is arranged at the head end of the screw rod (11) and used for being implanted into the screw body (10) in a rotating mode;
an implantation hole (30) is formed in the side wall of the nail rod (11), and the implantation hole (30) is communicated with the guide hole (20); after the hollow screw is implanted into a fixed fracture part, filler can be implanted through the guide hole (20) and the implantation hole (30) to close the fracture gap.
2. The guided implantable filler cannulation screw of claim 1, wherein the guide bore (20) comprises:
a first section (21) arranged in a part of the head end of the nail shank (11); and
a second section (22) arranged in a part of the tail end of the nail rod (11);
the diameter of the first section (21) is smaller than the diameter of the second section (22); the implant hole (30) is in communication with the second section (22) and is located at the junction of the first section (21) and the second section (22).
3. The guided implantable filler cannulation screw of claim 2, wherein the filler is passable through the second section (22) and the implant hole (30) but not the first section (21); the guide wire may pass through the first segment (21) and the second segment (22).
4. The guided implantable filler cannulation screw of claim 2, wherein the guide bore (20) further comprises a tail section (23) disposed within the tail (12); the diameter of the tail section (23) is greater than the diameter of the second section (22).
5. The guided implantable filler cannulation screw of claim 4, wherein a portion of the trailing end of the tail section (23) is regular hexagonal or quincunx in cross-section.
6. The guided implantable filler cannulation screw of claim 4, wherein the tail section (23) and the second section (22) are connected by a tapered section.
7. The guided implantable filler cannulated screw of claim 2, wherein the second segment (22) is connected to the implant hole (30) by a curved segment (24) having a smooth continuous curve.
8. A guided implantable filler cannulation screw according to claim 1, wherein the head end of the shank (11) is provided with a self-tapping slot (112).
9. The guided implantable filler cannulated screw of claim 1, wherein the shank (12) is provided with a second thread (121); the pitch of the first thread (111) is greater than the pitch of the second thread (121).
10. A guided implantable filler cannulated screw according to claim 1, wherein the filler is selected from one or more of bone cement, particulate bone, cancellous bone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111277316.1A CN114027961A (en) | 2021-10-29 | 2021-10-29 | Hollow screw for guiding implantable filler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111277316.1A CN114027961A (en) | 2021-10-29 | 2021-10-29 | Hollow screw for guiding implantable filler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114027961A true CN114027961A (en) | 2022-02-11 |
Family
ID=80136023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111277316.1A Withdrawn CN114027961A (en) | 2021-10-29 | 2021-10-29 | Hollow screw for guiding implantable filler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114027961A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114832165A (en) * | 2022-05-18 | 2022-08-02 | 中国人民解放军空军军医大学 | Orthopedic screw and preparation method thereof |
-
2021
- 2021-10-29 CN CN202111277316.1A patent/CN114027961A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114832165A (en) * | 2022-05-18 | 2022-08-02 | 中国人民解放军空军军医大学 | Orthopedic screw and preparation method thereof |
| CN114832165B (en) * | 2022-05-18 | 2023-09-01 | 中国人民解放军空军军医大学 | Screw for orthopaedics and preparation method thereof |
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Application publication date: 20220211 |
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| WW01 | Invention patent application withdrawn after publication |