CN113520559A - Screw assembly for orthopedics - Google Patents
Screw assembly for orthopedics Download PDFInfo
- Publication number
- CN113520559A CN113520559A CN202110951491.8A CN202110951491A CN113520559A CN 113520559 A CN113520559 A CN 113520559A CN 202110951491 A CN202110951491 A CN 202110951491A CN 113520559 A CN113520559 A CN 113520559A
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- Prior art keywords
- screw
- main
- auxiliary
- hole
- orthopedic
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- 230000000399 orthopedic effect Effects 0.000 title claims abstract description 19
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 14
- 239000000956 alloy Substances 0.000 claims description 4
- 208000010392 Bone Fractures Diseases 0.000 abstract description 26
- 206010017076 Fracture Diseases 0.000 abstract description 26
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 230000000642 iatrogenic effect Effects 0.000 abstract description 5
- 208000027418 Wounds and injury Diseases 0.000 abstract description 4
- 230000002980 postoperative effect Effects 0.000 description 4
- 206010070917 Eccentric fixation Diseases 0.000 description 3
- 230000017531 blood circulation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000747 poly(lactic acid) Polymers 0.000 description 2
- 239000004626 polylactic acid Substances 0.000 description 2
- 210000004872 soft tissue Anatomy 0.000 description 2
- 230000008733 trauma Effects 0.000 description 2
- 206010017088 Fracture nonunion Diseases 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000002224 dissection Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
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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
- A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
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- 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)
- Neurology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses an orthopedic screw assembly, which comprises a main screw and at least one auxiliary screw, wherein the head of the main screw is provided with a through hole for the auxiliary screw to pass through, and when the auxiliary screw passes through the through hole and is matched with the main screw to fix a bone, the main screw and the auxiliary screw form an included angle of 0-180 degrees. This screw subassembly for orthopedics makes auxiliary screw pass main screw and cooperates metal skeleton jointly and fix, has abandoned the use of bridging steel sheet for the incision that fracture patient fracture end resets is little, need not to prolong the incision again and increases iatrogenic wound, can put into stable internal fixation, operation easy operation.
Description
The technical field is as follows:
the invention relates to the field of medical instruments, in particular to an orthopedic screw assembly.
Background art:
the prior internal fixation technology for fracture mainly comprises steel plate screws, intramedullary nails and the like. Each has its indications and advantages and disadvantages. The plate screw system requires a greater range of stripping and exposure of the fracture end, increasing trauma to the patient and disrupting the blood transport to the fracture end to some extent. Intramedullary nail systems are commonly used for long-bone trunk fracture, although the fracture end can not be stripped and exposed, intramedullary nails with similar medullary cavity thickness need to be placed in the long-bone medullary cavity, the intramedullary blood circulation of the fracture end is damaged, micromotion exists for elastically fixing the fracture end, and complications of fracture nonunion exist frequently. These two major internal fixation techniques cause major iatrogenic trauma to the patient. In addition, partial fracture can be fixed by screws, but the problem of insufficient fixing strength is easy to exist, and in addition, the operation field of fracture incision reduction, in which nails cannot be placed, often exists, additional incisions are needed.
That is, the prior art steel plate screw internal fixation has the following drawbacks: a larger range of steel plates are required to be built in to provide sufficient stability to the fracture end so that more soft tissue dissection is revealed. The steel plate occupies soft tissue volume, and causes difficulty for incision suturing and postoperative functional exercise. Mechanically, the eccentric fixation is realized. The extramedullary blood circulation is damaged much. The intramedullary nail has the following defects: the marrow cavity has wide blood circulation damage range, and the broken end of the fracture can not be firmly fixed, thus the delayed union and nonunion of the fracture are easily caused. The single screw internal fixation is easy to have the problems of insufficient fixation strength and the frequent defect that the nail can not be placed in the operative field of fracture incision reduction and additional incision is needed. The external fixation frame technology of the fracture can cause that the elastic fixation is not easy to heal, the nail mouth nursing is troublesome, the nail mouth is infected, and the like.
The invention content is as follows:
the invention aims to solve the technical problem of providing an orthopedic screw assembly with small incision and small iatrogenic wound, which is low in cost, and the center fixation is not eccentric fixation in biomechanics, so that a fracture end can provide enough stable strength, and the fracture end cannot be healed due to micromotion caused by postoperative exercise.
The invention provides an orthopedic screw assembly, which comprises a main screw and at least one auxiliary screw, wherein the head of the main screw is provided with a through hole for the auxiliary screw to pass through, and when the auxiliary screw passes through the through hole and is matched with the main screw to fix bones, the main screw and the auxiliary screw form an included angle of 0-180 degrees.
Compared with the prior art, the invention has the following advantages after adopting the structure: because the screw assembly is adopted, the auxiliary screw penetrates through the main screw to be matched with the metal skeleton for fixation, the use of a bridging steel plate is abandoned, the incision for resetting the fracture end of the fracture patient is small, the incision is not required to be prolonged, the iatrogenic wound is not required to be increased, the stable internal fixation can be arranged, and the operation is simple. And is a strong fixation rather than an elastic fixation. Biomechanically, central fixation is not eccentric fixation. The fracture end can provide enough stable strength, and postoperative exercise can not lead to fracture end micromotion to cause nonunion. In addition, the built-in screw system has low cost and low medical expense.
Preferably, the auxiliary screw has a size smaller than that of the main screw. The length and the thickness can be different types so as to adapt to different scenes.
Preferably, the main screw and the auxiliary screw form an included angle of 90 °.
Preferably, the main screw comprises a first screw and a second screw, a through hole perpendicular to the axial direction is formed in one side of the head of the first screw, the through hole is matched with the auxiliary screw, and the top end of the head of the first screw is in threaded fit with the second screw. The main screw and the auxiliary screw are conveniently fixed, and after the main screw and the auxiliary screw are fixed, the second screw part at the rear end of the main screw can be disassembled.
Preferably, the top surface of the head of the second screw has a driver-fitting hole. Is convenient to fix and use.
Preferably, the head of the main screw is spherical, a through hole matched with the auxiliary screw is formed in the head of the main screw in a direction perpendicular to the axial direction, the top end of the head of the main screw is a plane, and a groove matched with a screwdriver is concavely formed in the plane. Is convenient to fix and use.
Preferably, the shank portion of the main screw has a through hole. The weight is reduced, the stress is reduced, meanwhile, the through hole can be filled with degradable materials, and the fixing strength is improved during installation and initial use.
Preferably, the through-hole is provided in the axial direction and forms a strip-shaped hole. The weight is reduced, and the through hole can be filled with degradable materials, so that the fixing strength is improved during installation and initial use.
Preferably, the main screw is provided with two symmetrical long-strip grooves along the axial direction in a concave manner, and the through holes are uniformly distributed in the long-strip grooves at intervals. Can be fixed more firmly when fixing the bone. And a degradable material such as polylactic acid resin can be selectively filled in the through holes.
Further, the main screw and the auxiliary screw are made of any one or a combination of metal, alloy material or automatic degradable material. The degradable or non-degradable material can be selected according to the needs to adapt to the needs of different scenes.
Description of the drawings:
fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a main screw according to another embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a main screw according to another embodiment of the present invention.
The specific implementation mode is as follows:
the invention is further described with reference to the following figures and detailed description:
example 1
As shown in fig. 1, the orthopedic screw assembly comprises a main screw and at least one auxiliary screw, wherein the head of the main screw is provided with a through hole for the auxiliary screw to pass through, and when the auxiliary screw passes through the through hole and is matched with the main screw to fix bones, the main screw and the auxiliary screw form an included angle of 0-180 degrees. In this embodiment, the number of the auxiliary screws 2 is one, and the main screw and the auxiliary screw 2 form an included angle of 90 degrees, and if the included angle is other special included angles such as 0 degree or 180 degrees, the head of the main screw can be expanded to form a through hole through which the auxiliary screw can pass. The auxiliary screw 2 has a smaller size than the main screw.
In this embodiment, the main screw is composed of two parts, namely a first screw 11 and a second screw 12, a through hole perpendicular to the axial direction is formed on one side of the head of the first screw 12, the through hole is matched with the auxiliary screw, so that the auxiliary screw 2 can penetrate through the through hole to be matched with the first screw 11 for bone fixation, and the top end of the head of the first screw 11 is coaxially matched with the second screw 12 in a threaded manner. The main screw and the auxiliary screw are conveniently fixed, after the fixing is completed, because the head of the first screw 11 is in threaded connection with the second screw 12, the second screw 12 part at the rear end of the main screw can be detached after the first screw 11 is fixed, namely, the top end of the head of the first screw 11 is concavely provided with an inner screw hole which is in threaded connection with the second screw, and the screw rod part of the second screw is a flat head end surface so as to reduce the length.
And, in order to facilitate the fixing and use, the top surface of the head of the second screw 2 has a screwdriver mating hole. So that the screwdriver head can be accommodated in the screwdriver matching hole for operation.
In addition, the first screw 11 and the auxiliary screw 2 can be made of degradable material, such as polylactic resin, and the second screw which can be reused is made of stainless steel material or titanium alloy material, thereby reducing the cost.
It should be noted that the structure of the auxiliary screw may be a conventional screw structure.
A plurality of double-screw components can be placed at multiple points in the orthopedic surgery, so that sufficient mechanical stability is obtained.
Example 2
As shown in fig. 2, on the basis of the auxiliary screw having the same structure as that of embodiment 1, the main screw 1 is provided with a spherical head, a through hole 13 matched with the auxiliary screw is formed in the head of the main screw 1 in a direction perpendicular to the axial direction, the auxiliary screw passes through the through hole and is matched with the main screw to fix a bone, wherein the top end of the head of the main screw 1 is a plane, and a groove matched with a screwdriver is concavely formed in the plane, so that the screwdriver is convenient to use during fixing. In this embodiment, the main screw is of an integrated structure.
In order to reduce stress and weight during processing and fixing, the shank portion of the main screw 1 has a through hole 14. Meanwhile, the through hole can be filled with degradable materials, so that the fixing strength is improved during installation and initial use, and the degradable materials in the through hole can be automatically degraded in the later period.
In this embodiment, the through holes 14 are arranged in the axial direction and form strip-shaped holes. The through holes can be opened as large as possible under the condition of not influencing the strength of the main screw. The through hole can be filled with degradable materials, and the rest part is made of titanium alloy materials.
Example 3
On the basis of embodiment 2, can further improve, main screw 1 is equipped with two rectangular shape recesses 15 of symmetry along the axial concave, through-hole 14 is circular through-hole and evenly interval distribution in rectangular shape recess 15. This may provide a more secure fixation when the bone is fixed. And a degradable material such as polylactic acid resin may be selectively filled in the penetration hole so that the degradable material can be degraded after the operation.
In this embodiment, only the main screw and the auxiliary screw form a 90 ° included angle for explanation, and for a 60 ° included angle or a 30 ° included angle, only the angle of the through hole needs to be correspondingly adjusted.
This structure can reduce screw assembly's volume by a wide margin to do the little screw assembly, saved the bridging steel sheet among the prior art, can directly bury the pin fin into the cortex of bone, realize that many positions multiple spot puts the nail. The incision for resetting the fracture end of the fracture patient is small, stable internal fixation can be achieved without prolonging the incision and increasing iatrogenic wound, and the operation is simple. While reducing material and surgical costs. In addition, the fracture end can provide enough stable strength, and the fracture end cannot be healed due to micromotion caused by postoperative exercise.
The foregoing is illustrative of the preferred embodiments of the present invention only and is not to be construed as limiting the claims. All equivalent structures or equivalent process changes made by using the contents of the specification and the drawings of the invention are included in the scope of the patent protection of the invention.
Claims (10)
1. The utility model provides an orthopedic screw assembly, includes main screw, its characterized in that: the bone fixing device further comprises at least one auxiliary screw, wherein the head of the main screw is provided with a through hole for the auxiliary screw to pass through, and when the auxiliary screw passes through the through hole and is matched with the main screw to fix a bone, the main screw and the auxiliary screw form an included angle of 0-180 degrees.
2. The orthopedic screw assembly of claim 1, wherein: the auxiliary screw has a size smaller than that of the main screw.
3. The orthopedic screw assembly of claim 1, wherein: the main screw and the auxiliary screw form a 90-degree included angle.
4. The orthopedic screw assembly of claim 3, wherein: the main screw comprises a first screw and a second screw, one side of the head of the first screw is provided with a through hole perpendicular to the axial direction, the through hole is matched with the auxiliary screw, and the top end of the head of the first screw is in threaded connection with the second screw.
5. The orthopedic screw assembly of claim 4, wherein: the top surface of the head of the second screw is provided with a screwdriver matching hole.
6. The orthopedic screw assembly of claim 3, wherein: the main screw head is spherical, a through hole matched with the auxiliary screw is formed in the position, perpendicular to the axial direction, of the main screw head, the top end of the main screw head is a plane, and a groove matched with the screwdriver is concavely formed in the plane.
7. The orthopedic screw assembly of claim 6, wherein: the screw part of the main screw is provided with a through hole.
8. The orthopedic screw assembly of claim 7, wherein: the through holes are axially arranged and form strip-shaped holes.
9. The orthopedic screw assembly of claim 7, wherein: the main screw is provided with two symmetrical strip-shaped grooves along the axial direction in a concave mode, and the through holes are evenly distributed in the strip-shaped grooves at intervals.
10. The orthopedic screw assembly of claim 1, wherein: the main screw and the auxiliary screw are made of any one or combination of metal, alloy material or automatic degradable material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110951491.8A CN113520559A (en) | 2021-08-18 | 2021-08-18 | Screw assembly for orthopedics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110951491.8A CN113520559A (en) | 2021-08-18 | 2021-08-18 | Screw assembly for orthopedics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113520559A true CN113520559A (en) | 2021-10-22 |
Family
ID=78122633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110951491.8A Pending CN113520559A (en) | 2021-08-18 | 2021-08-18 | Screw assembly for orthopedics |
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| Country | Link |
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| CN (1) | CN113520559A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0838199A1 (en) * | 1996-10-24 | 1998-04-29 | Hit Medica S.r.l. | Nail for reducing fractures of the trochanter and of the neck of the femur |
| US20020032445A1 (en) * | 2000-07-27 | 2002-03-14 | Hiroo Fujiwara | Intramedullary nail |
| CN2487349Y (en) * | 2001-08-07 | 2002-04-24 | 黄彰 | Pressing expansion screw with locking for neck of femur |
| CN102715945A (en) * | 2012-06-08 | 2012-10-10 | 浙江科惠医疗器械有限公司 | Corner locking hollow screw for fracture treatment |
| CN103654934A (en) * | 2012-08-30 | 2014-03-26 | 上海微创骨科医疗科技有限公司 | Combined type locking screw applied to bone plate and bone plate system comprising same |
| KR20140091983A (en) * | 2013-01-14 | 2014-07-23 | 전북대학교산학협력단 | Fixed devices used in orthopedic |
| CN209548075U (en) * | 2018-11-16 | 2019-10-29 | 中国人民解放军第二军医大学第二附属医院 | A kind of knochenbruch setting tool |
| CN112426189A (en) * | 2020-11-19 | 2021-03-02 | 中山大学 | Degradable porous magnesium-based interface screw with bioactivity |
| CN215606178U (en) * | 2021-08-18 | 2022-01-25 | 中国人民解放军总医院第一医学中心 | Screw assembly for orthopedics |
-
2021
- 2021-08-18 CN CN202110951491.8A patent/CN113520559A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0838199A1 (en) * | 1996-10-24 | 1998-04-29 | Hit Medica S.r.l. | Nail for reducing fractures of the trochanter and of the neck of the femur |
| US20020032445A1 (en) * | 2000-07-27 | 2002-03-14 | Hiroo Fujiwara | Intramedullary nail |
| CN2487349Y (en) * | 2001-08-07 | 2002-04-24 | 黄彰 | Pressing expansion screw with locking for neck of femur |
| CN102715945A (en) * | 2012-06-08 | 2012-10-10 | 浙江科惠医疗器械有限公司 | Corner locking hollow screw for fracture treatment |
| CN103654934A (en) * | 2012-08-30 | 2014-03-26 | 上海微创骨科医疗科技有限公司 | Combined type locking screw applied to bone plate and bone plate system comprising same |
| KR20140091983A (en) * | 2013-01-14 | 2014-07-23 | 전북대학교산학협력단 | Fixed devices used in orthopedic |
| CN209548075U (en) * | 2018-11-16 | 2019-10-29 | 中国人民解放军第二军医大学第二附属医院 | A kind of knochenbruch setting tool |
| CN112426189A (en) * | 2020-11-19 | 2021-03-02 | 中山大学 | Degradable porous magnesium-based interface screw with bioactivity |
| CN215606178U (en) * | 2021-08-18 | 2022-01-25 | 中国人民解放军总医院第一医学中心 | Screw assembly for orthopedics |
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