CN108433800B - Intramedullary steel plate fixing system - Google Patents
Intramedullary steel plate fixing system Download PDFInfo
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- CN108433800B CN108433800B CN201810335435.XA CN201810335435A CN108433800B CN 108433800 B CN108433800 B CN 108433800B CN 201810335435 A CN201810335435 A CN 201810335435A CN 108433800 B CN108433800 B CN 108433800B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 77
- 239000010959 steel Substances 0.000 title claims abstract description 77
- 238000010079 rubber tapping Methods 0.000 claims description 18
- 210000003128 head Anatomy 0.000 abstract description 15
- 238000005553 drilling Methods 0.000 abstract description 10
- 239000007943 implant Substances 0.000 abstract description 8
- 210000004233 talus Anatomy 0.000 abstract description 8
- 206010017076 Fracture Diseases 0.000 description 37
- 208000010392 Bone Fractures Diseases 0.000 description 33
- 238000002513 implantation Methods 0.000 description 21
- 230000000694 effects Effects 0.000 description 7
- 210000002436 femur neck Anatomy 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 210000000988 bone and bone Anatomy 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 208000020089 femoral neck fracture Diseases 0.000 description 3
- 208000026137 Soft tissue injury Diseases 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 208000015181 infectious disease Diseases 0.000 description 2
- 208000028867 ischemia Diseases 0.000 description 2
- 230000017074 necrotic cell death Effects 0.000 description 2
- PMVSDNDAUGGCCE-TYYBGVCCSA-L Ferrous fumarate Chemical group [Fe+2].[O-]C(=O)\C=C\C([O-])=O PMVSDNDAUGGCCE-TYYBGVCCSA-L 0.000 description 1
- 206010053206 Fracture displacement Diseases 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 206010028851 Necrosis Diseases 0.000 description 1
- 208000006735 Periostitis Diseases 0.000 description 1
- 206010062255 Soft tissue infection Diseases 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 241000469816 Varus Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 206010048049 Wrist fracture Diseases 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036770 blood supply Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004821 effect on bone Effects 0.000 description 1
- 210000003414 extremity Anatomy 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 210000002758 humerus Anatomy 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 210000003460 periosteum Anatomy 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
- A61B17/8057—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded the interlocking form comprising a thread
-
- 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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8061—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates specially adapted for particular bones
-
- 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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/808—Instruments for holding or positioning bone plates, or for adjusting screw-to-plate locking mechanisms
-
- 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
- A61B17/90—Guides therefor
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 relates to an intramedullary steel plate fixing system, and belongs to the technical field of medical appliances. It comprises an intramedullary steel plate, a screw, a sight and auxiliary instruments; the screw is positioned by the sighting device and the auxiliary instrument and is fixed on the intramedullary steel plate. The sighting device and the auxiliary instrument jointly complete screw hole positioning, drilling and screwing of screws under the condition that naked eyes are not needed to position the screw holes, the screws are connected with the steel plate, and fixation is carried out on fracture. The invention not only provides the intramedullary steel plate fixation of the intramedullary implant screw for fracture of the joint surface of the neck, the talus, the femoral head and the like and fracture of other parts, but also provides the intramedullary steel plate fixation of the intramedullary implant screw, is suitable for the intramedullary fixation of the fracture of some parts which cannot be implemented or are difficult to implement by the common steel plate, and is more reliable than the intramedullary fixation of the screw.
Description
Technical Field
The invention relates to an intramedullary steel plate fixing system, in particular to an intramedullary steel plate fixing system for fracture of joint surfaces of femur neck, talus, femoral head and the like and fracture of other larger bone parts, belonging to the technical field of medical appliances.
Background
Intramedullary nails and steel plates are standard internal fixation methods for limb fractures, however, there are special site fractures that are not suitable for intramedullary nails or steel plates, such as: fracture of joint surfaces such as femoral head and humerus head; the vast majority of the surface is the talus fracture and navicular fracture of the articular surface; there are also fractures of some parts of the steel plate that are more difficult to fix, such as fractures of the femoral neck. The fracture of the femoral neck is called as a clinically unresolved fracture, which is caused by the defect of the internal fixation of the existing screw, and has high incidence of complications such as bone nonunion, head necrosis, re-displacement, hip varus deformity and the like.
Recently, students propose that the internal fixation of the femoral neck fracture adopts the steel plate to be compared with the prior screw internal fixation or the intramedullary steel plate to cooperate with the screw internal fixation so as to improve the stability of the prior screw internal fixation, prevent the fracture displacement and facilitate the fracture healing. However, the part is deeper, the nerve blood vessel and femoral head blood supply are easy to be damaged by cutting open and resetting the internal fixation of the steel plate, the operation wound is larger, the steel plate increases the fixing mechanical strength, but the operation can increase the risks of femoral head ischemia, necrosis, infection and the like, so the clinical implementation is difficult, and the clinical application report of the internal fixation treatment of the steel plate is not developed so far.
The current method for fracture at these parts is countersunk screws or common screws. However, the screw is internally fixed to the fracture of the femoral neck, the fracture of the femoral head, the fracture of the talus, etc., and has the defect of poor fixation strength, failure in early rehabilitation exercise, disunion and possible fracture re-displacement. Secondly, there are fracture at the part with serious soft tissue injury or combined soft tissue infection possibility, such as fracture at the diaphyseal end of shank, serious soft tissue injury and skin ischemia change, the cutting and peeling can not be carried out, the internal fixation of a steel plate is placed, the intramedullary cavity of the part is wide, the intramedullary nail is used for fixing the part with poor effect and unreliable stability, the current method is to fix the external support, but the external support is fixed with the external support which has the defects of easy loosening of the external support nail, nail tract infection, inconvenient rehabilitation nursing, no direct fixing effect on the crushed fracture block, easy displacement and the like. At present, all steel plates are placed outside the medullary cavity for fixation, and no internal fixation method for placing the steel plates in the medullary cavity exists.
Disclosure of Invention
The invention aims to overcome the defects and provide an internal fixing system capable of placing a steel plate in a marrow cavity, which has more reliable fixing effect on bone fracture ends than screws and external brackets.
According to the technical scheme, the intramedullary steel plate fixing system comprises an intramedullary steel plate, screws, a sight and auxiliary instruments; the screw is positioned by the sighting device and the auxiliary instrument and is fixed on the intramedullary steel plate. The sighting device and the auxiliary instrument jointly complete screw hole positioning, drilling and screwing of screws under the condition that naked eyes are not needed to position the screw holes, the screws are connected with the steel plate, and fixation is carried out on fracture.
The intramedullary steel plate comprises a steel plate body and a threaded hole; a plurality of threaded holes are uniformly distributed in the steel plate body. The threaded holes are inclined hole threaded holes or straight hole threaded holes, the inclined hole threaded holes are used for intramedullary implantation screws, and the straight hole threaded holes are used for extramedullary implantation screws.
The threaded holes on the steel plate body are locking threaded holes. The inclined hole threaded holes facilitate drilling and implanting screws in a smaller space. The pitch and diameter of the threaded hole are matched with those of the threads at the rear part (head part) of the screw.
The size and shape of the steel plate are the same as those of a common steel plate, and the parts of the steel plate are different in specification and the thickness is 3.5-10mm; wherein the inclination of the inclined hole threaded hole is 25-35 degrees; the diameter of the threaded hole is 3.0-5.0mm.
The screw is a self-tapping screw or a half-thread screw; the diameter of the screw is 2.5-4.5mm. The self-tapping screw is used for the inclined hole threaded hole, and the half-thread screw is used for the straight hole threaded hole. The diameter of the self-tapping screw is smaller than or equal to that of the inclined hole threaded hole; the front part of the half-thread screw is provided with threads, the rear part of the half-thread screw is unthreaded, and the diameter of the front thread is equal to that of the straight hole threaded hole.
The screw is made of titanium alloy material, and the front part of the screw is pointed and thin. The screws include a screw for an intramedullary implant screw and a screw for an intramedullary implant screw. The front half of the screw for the marrow external implantation is provided with a locking thread, the rear half is not provided with a thread, and the pitch and the diameter of the locking thread of the front half are matched with those of the threaded hole on the steel plate body. The screw of the screw for intramedullary implantation comprises a non-locking screw and a locking screw, wherein the non-locking screw is a common self-tapping screw and is smaller than the threaded hole; the locking screw is a common self-tapping locking screw, the front middle part is a common screw thread, the rear part (head) is a locking screw thread, and the screw pitch and the diameter of the rear part (head) locking screw thread are matched with those of the inclined hole screw hole.
The sight includes a sight for intramedullary implantation and a sight for intramedullary implantation. The sight is U-shaped frame structure, and its effect is the position of help locating all screw holes on the steel sheet under the condition that need not naked eye direct view location screw hole position. The locating rod of the femoral neck fracture intramedullary implantation method sighting device is an eccentric rod, scale marks are arranged on the locating rod, the nail holding forceps slide along the eccentric rod to reach the front scale marks, and the center positions of the nail holding forceps correspond to the center of the threaded hole positions on the steel plate one by one.
The auxiliary instruments include an auxiliary instrument for intramedullary implantation and an auxiliary instrument for intramedullary implantation. Auxiliary instruments for extramedullary implantation include conventional bushings, drills, and screwdrivers. The auxiliary instrument is used for assisting in drilling and screwing in the screw to fix after the sight is positioned at the screw hole. The auxiliary instrument for intramedullary implantation comprises a nail holder, a drill bit, a flexible connection electric drill and an 8-shaped connection manual screwdriver, wherein the joint at the rear of the drill bit and the screw of the flexible connection electric drill and the 8-shaped connection manual screwdriver can be bent, so that drilling and screwing operations can be carried out in a far smaller space range under a bending state.
The invention has the beneficial effects that: the invention not only provides the intramedullary steel plate fixation of the intramedullary implant screw for fracture of the joint surface of the neck, the talus, the femoral head and the like and fracture of other parts, but also provides the intramedullary steel plate fixation of the intramedullary implant screw, is suitable for the intramedullary fixation of the fracture of some parts which cannot be implemented or are difficult to implement by the common steel plate, and is more reliable than the intramedullary fixation of the screw.
Drawings
FIG. 1-a is a schematic view of the structure of an intramedullary steel plate with inclined hole and threaded hole according to the present invention.
FIG. 1-b is a schematic view of the structure of the straight-hole threaded hole intramedullary steel plate of the invention.
FIG. 2-a is a schematic view of the structure of the tapping screw according to the present invention.
Fig. 2-b is a schematic view of the half-thread screw structure of the present invention.
Fig. 3 is a schematic view of the sight structure of the present invention.
Fig. 4-1 is a schematic view of the staple holder of the present invention.
Fig. 4-2 is a schematic diagram of the 8-connection manual screwdriver of the invention.
Fig. 5-1 is a schematic view of an intramedullary implant screw of the present invention.
Fig. 5-2 is a schematic view of an extramedullary implant screw of the present invention.
Reference numerals illustrate: 1. intramedullary steel plate; 1-1, a steel plate body; 1-2, a threaded hole; 2. a screw; 2-1, self-tapping screws; 2-2, a half-thread screw; 3. a sight; 3-1, scale bars; 3-2, clamping plates; 4. an auxiliary instrument; 5. the 8-shaped connecting hand screwdriver; 5-1, a handle; 5-2, a screwdriver body; 5-3, connecting parts; 5-4, bayonet.
Detailed Description
As shown in fig. 1 to 4, the intramedullary steel plate fixing system is mainly used for fracture of the neck of femur, fracture of the joint surface of the talus, the femoral head, and other fractures of larger bone parts, and comprises an intramedullary steel plate 1, a screw 2, a sight 3, and an auxiliary instrument 4; the screw 2 is positioned by the sight 3 and the auxiliary instrument 4 and is fixed on the intramedullary steel plate 1. The sighting device 3 and the auxiliary instrument 4 jointly complete the positioning, drilling and screwing of screw holes without visual self-positioning, and the screw 2 is screwed, so that the screw 2 is connected with the steel plate 1 to fix the fracture.
The intramedullary steel plate 1 comprises a steel plate body 1-1 and a threaded hole 1-2; a plurality of threaded holes 1-2 are uniformly distributed on the steel plate body 1-1. The threaded hole 1-2 is an inclined hole threaded hole or a straight hole threaded hole.
The screw 2 is a self-tapping screw 2-1 or a half-threaded screw 2-2; the self-tapping screw 2-1 is used for an inclined hole threaded hole, and the half-thread screw 2-2 is used for a straight hole threaded hole. The diameter of the self-tapping screw 2-1 is smaller than or equal to that of the inclined hole threaded hole; the front part of the half-thread screw 2-2 is provided with threads, the rear part is unthreaded, and the diameter of the front thread is equal to that of the straight hole threaded hole.
The self-tapping screw 2-1 is used for intramedullary implantation, and the pitch and the diameter of the self-tapping screw 2-1 are mutually matched with the inclined hole threaded hole on the intramedullary steel plate 1 or slightly smaller than the inclined hole threaded hole of the intramedullary steel plate 1. The diameter is smaller than that of the inclined hole threaded hole, so that the sliding compression function can be realized, and the traction and reduction effects on the fracture end can be realized; the tapping screw 2-1 with the diameter matched with the inclined hole threaded hole on the intramedullary steel plate 1 is a locking screw, the front middle part is a common thread, the rear part is a locking thread, and the pitch and the diameter of the rear locking thread are matched with those of the threaded hole on the inclined hole steel plate.
The inclination of the inclined hole threaded hole is 25-35 degrees; the diameter of the screw hole of the inclined hole screw hole or the straight hole screw hole is 3.0-5.0mm.
As shown in fig. 3, the sight 3 is U-shaped and is an integral structure; the device comprises a scale bar 3-1 and a clamping plate 3-2, wherein the scale bar 3-1 and the clamping plate 3-2 are arranged in parallel and are connected through a connecting rod; the scale strip 3-1 is provided with scales. The scales of the scale bar 3-1 correspond to the threaded holes 1-2 on the intramedullary steel plate 1.
The sighting device is an intramedullary nail sighting device purchased from the market, and the sighting device is suitable for fracture of femoral neck, fracture of articular surfaces such as talus, femoral head and the like and fracture of other larger bone parts.
The auxiliary instrument is used for assisting in drilling and screwing in the screw to fix under the position of the set screw hole of the sighting device. The auxiliary instruments include an auxiliary instrument for intramedullary implantation and an auxiliary instrument for intramedullary implantation. Auxiliary instruments for extramedullary implantation include conventional bushings, drills, and screwdrivers. The auxiliary instrument is used for assisting in drilling and screwing in the screw to fix after the sight is positioned at the screw hole. The auxiliary instrument for intramedullary implantation comprises a nail holder (shown in figure 4-1), a drill bit, a flexible connection electric drill and an 8-shaped connection manual screwdriver, wherein the joints behind the drill bit and the screw of the flexible connection electric drill and the 8-shaped connection manual screwdriver can be bent, so that the operation of drilling and screwing in the screw in a far smaller space range in a bending state is facilitated.
The flexible connection electric drill is a universal flexible shaft connection electric drill, and the same type of products can be purchased in the market.
The 8-shaped connection manual screwdriver 5 is specifically shown in fig. 4-2, and comprises a handle 5-1, wherein the handle 5-1 is connected with a screwdriver body 5-2, the screwdriver body 5-2 is connected with an 8-shaped connection part 5-3, and the front end of the 8-shaped connection part 5-3 is connected with a bayonet 5-4. The 8-shaped connecting part 5-3 is two iron rings which are connected with each other, and the front end of one iron ring is connected with the bayonet 5-4.
The application scenes of the intramedullary steel plate 1 and the screw 2 can be divided into an intramedullary implantation use and an intramedullary implantation use; when the intramedullary steel plate 1 for the intramedullary implantation is used, the sight 3 is connected with the intramedullary steel plate 1, the intramedullary steel plate 1 is placed at the intramedullary cavity position needing to be fixed from the opening of the safe area, and the position of the screw hole of the screw 2 needing to be implanted is positioned by utilizing the scale bar 3-1 on the sight 3. The skin is made a small incision, the incision is separated to periosteum, an auxiliary instrument sleeve and a drill bit are placed, whether the position of the drill bit is correct or not can be clarified again by utilizing the perspective of a C-arm X-ray machine, an electric drill is started to drill after the position of the drill bit is correct, a half-thread screw 2-2 with a proper length is selected after the drill is drilled, and the screw is screwed into the screw by using a common manual screw driver sleeve to fix.
When the intramedullary steel plate 1 for intramedullary implantation is used, the sighting device 3 is connected with the intramedullary steel plate 1, the intramedullary steel plate 1 is placed at the position of a required fixed intramedullary cavity from the opening of a safe area, the scale bar 3-1 of the sighting device 3 for intramedullary implantation of femoral neck fracture is an eccentric sliding rod, the nail holding forceps reach the front screw hole position along the eccentric sliding rod, and the positions of the nail holding forceps are in one-to-one correspondence with the screw holes on the steel plate. The nail holding pliers clamp the flexibly connected drill bit to slide to the screw hole position of the screw 2 to be implanted along the locating rod, whether the drill bit position is correct or not can be clarified again by utilizing the perspective of the C-arm X-ray machine, after the drill bit position is correct, the flexibly connected electric drill is started to drill, after the drill bit is drilled, the nail holding pliers pull out the drill bit, the self-tapping screw 2-1 with proper length is selected, the self-tapping screw 2-1 is held by the nail holding pliers and a manual screwdriver connected in a 8-shaped manner slides to the screw hole position of the screw to be implanted along the scale bar 3-1, and the manual screwdriver connected in the 8-shaped manner is rotated to screw the screw for fixing.
The common purpose of screw hole tilting, flexible connection drill and 8-connection hand screwdriver is to facilitate drilling and screwing in screws in a small space in a bent state. The thread pitch and the diameter of the locking steel plate threaded hole are matched with those of the locking screw thread, and the locking fixing effect is implemented. If the non-locking screw is adopted, the screw and the screw hole have a gap because the diameter of the non-locking screw is smaller than that of the screw hole, so that the compression fixation effect on the fracture can be achieved, and the fracture can be pulled for quick reduction.
When the invention is used, different intramedullary steel plate systems are selected according to different parts to fix fracture, especially to play a reliable fixing role on fracture of femoral neck, fracture of joint surface such as talus and femoral head and fracture of other parts, the fixing effect is better than that of simple screw, and the patient can recover earlier due to reliable fixing.
Claims (5)
1. Intramedullary steel plate fixing system, characterized by: comprises an intramedullary steel plate (1), a screw (2), a sight (3) and an auxiliary instrument (4); the screw (2) is positioned through the sighting device (3) and the auxiliary instrument (4) and is fixed on the intramedullary steel plate (1);
the intramedullary steel plate (1) comprises a steel plate body (1-1) and a threaded hole (1-2); a plurality of threaded holes (1-2) are uniformly distributed on the steel plate body (1-1);
the sighting device (3) is U-shaped and is of an integrated structure; the device comprises a scale bar (3-1) and a clamping plate (3-2), wherein the scale bar (3-1) and the clamping plate (3-2) are arranged in parallel and are connected through a connecting rod; the scale strip (3-1) is provided with scales;
the threaded hole (1-2) is an inclined hole threaded hole or a straight hole threaded hole;
the inclination of the inclined hole threaded hole is 25-35 degrees; the diameter of the screw hole of the inclined hole screw hole or the straight hole screw hole is 3.0-5.0mm.
2. The intramedullary steel fixation system of claim 1, wherein: the screw (2) is a self-tapping screw (2-1) or a half-threaded screw (2-2); the self-tapping screw (2-1) is used for an inclined hole threaded hole, and the half-thread screw (2-2) is used for a straight hole threaded hole.
3. The intramedullary steel fixation system of claim 2, wherein: the diameter of the self-tapping screw (2-1) is smaller than or equal to that of the inclined hole threaded hole; the front part of the half-thread screw (2-2) is provided with threads, the rear part is unthreaded, and the diameter of the front thread is equal to that of the straight hole threaded hole.
4. The intramedullary steel fixation system of claim 1, wherein: the scales of the scale bar (3-1) are corresponding to the threaded holes (1-2) on the intramedullary steel plate (1).
5. The intramedullary steel fixation system of claim 1, wherein: the auxiliary instrument (4) comprises a sleeve, an electric drill, a screwdriver, a nail holder, a drill bit, a flexible connection electric drill and/or an 8-shaped connection manual screwdriver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810335435.XA CN108433800B (en) | 2018-04-16 | 2018-04-16 | Intramedullary steel plate fixing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810335435.XA CN108433800B (en) | 2018-04-16 | 2018-04-16 | Intramedullary steel plate fixing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108433800A CN108433800A (en) | 2018-08-24 |
| CN108433800B true CN108433800B (en) | 2024-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810335435.XA Active CN108433800B (en) | 2018-04-16 | 2018-04-16 | Intramedullary steel plate fixing system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112402000B (en) * | 2020-11-13 | 2022-03-11 | 山东中医药大学附属医院 | Steel plate insertion auxiliary device, steel plate automatic insertion system and control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202619829U (en) * | 2011-11-28 | 2012-12-26 | 陈凌云 | Femoral neck interlocking intramedullary fixing device |
| CN204106183U (en) * | 2014-10-23 | 2015-01-21 | 重庆医科大学附属永川医院 | Parallel shelf location assisting navigation Proximal femoral nail antirotation embedded device |
| CN104887301A (en) * | 2015-06-26 | 2015-09-09 | 陈伟 | Pelvic fracture microinvasive intramedullary fixation device |
| CN209220465U (en) * | 2018-04-16 | 2019-08-09 | 无锡市第九人民医院 | Interal fixation system in marrow |
-
2018
- 2018-04-16 CN CN201810335435.XA patent/CN108433800B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202619829U (en) * | 2011-11-28 | 2012-12-26 | 陈凌云 | Femoral neck interlocking intramedullary fixing device |
| CN204106183U (en) * | 2014-10-23 | 2015-01-21 | 重庆医科大学附属永川医院 | Parallel shelf location assisting navigation Proximal femoral nail antirotation embedded device |
| CN104887301A (en) * | 2015-06-26 | 2015-09-09 | 陈伟 | Pelvic fracture microinvasive intramedullary fixation device |
| CN209220465U (en) * | 2018-04-16 | 2019-08-09 | 无锡市第九人民医院 | Interal fixation system in marrow |
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| Publication number | Publication date |
|---|---|
| CN108433800A (en) | 2018-08-24 |
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