CN107822701A - A kind of PFN - Google Patents
A kind of PFN Download PDFInfo
- Publication number
- CN107822701A CN107822701A CN201711053772.1A CN201711053772A CN107822701A CN 107822701 A CN107822701 A CN 107822701A CN 201711053772 A CN201711053772 A CN 201711053772A CN 107822701 A CN107822701 A CN 107822701A
- Authority
- CN
- China
- Prior art keywords
- screw
- lock screw
- screw hole
- main nail
- lock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- A61B17/72—Intramedullary pins, nails or other devices
-
- 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
- A61B17/74—Devices for the head or neck or trochanter of the femur
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)
- Neurology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a kind of PFN, including the lock screw for being screwed into neck of femur and main nail, lock screw is made with main nail of non-degradable bioactive materials, the master is nailed on provided with screw hole and fixing screw hole, screw hole and fixing screw hole are respectively positioned at main ailhead, tail both ends, lock screw is fixedly connected through screw hole with main nail, and lock screw head end is sharp, and lock screw rivet nut is provided with hangnail indentation close to head end.The present invention is by the way that lock screw and main nail are fixed, and hangnail indentation is set in lock screw rivet nut, the stress for acting on fracture site is set to be undertaken completely by lock screw and main nail, so that the bone piece of fracture site keeps stable, prevent phenomena such as compression, screw are cut between coxa vara, fracture site, avoid lock screw simultaneously moves back nail, can clinically reduce the postoperative comminuted fracture broken ends of fractured bone shift again and caused by complication.
Description
Technical field
The invention belongs to technical field of medical instruments, is related to a kind of PFN.
Background technology
The design of gamma nail comes from Europe, Grosse applications gamma nail treatment intertrochanteric fracture earliest.From Halder
Since surgical technic Deng (1992) report gamma nail, as performing the operation, classical technology is used till today always.Gamma nail combines hip
Slide pressurization nail with Medullary fixation the advantages of, it is easy to operate, fixation strong and dynamic pressurization the advantages of, especially lag screw is in master
The dynamic pressurization effect that sliding design in nail is formed is also more direct.But many clinicians think the dynamic pressurization of gamma nail
Effect is to treat a principal element of the serious unstable fracture failure of femoral intertrochanteric.In Evans I, II, type III fracture
When, because fracture face is stable, dynamic pressurization, which acts on, make it that fracture face is close mutually embedding and is continuously available beneficial stress stimulation,
Accelerating union of bone fracture.But for EvansIV types fracture, tuberosity part crushing, the splitting of old severe osteoporosis, tuberosity part with
And Parkinsonian, after being fixed using gamma nail, because the presence of fracture end dynamic pressurization effect will answer fracture site
By compressing (the i.e. postoperative related lag screw of femoral head, which integrally glides, causes fracture end cripetura), varus, screw in the presence of power
The modes such as cutting reach stablizing again for fracture, crush it is more serious, to reach distortion stably occurred between fracture site
More go through evil；So as to cause displacement fracture, coxa vara, suffering limb cripetura, lag screw to move back nail and Parkinsonian because of suffering limb not
Stop continuing shake to cause lag screw early stage loosening just occur and move back nail phenomenon, cause the complication such as Unstable internal fixation.
The content of the invention
It is an object of the invention to provide a kind of PFN, and the bone piece of fracture site can be made to keep stable.
The technical solution adopted in the present invention is a kind of PFN, including is screwed into the lock screw of neck of femur
With main nail, lock screw is made of non-degradable bioactive materials with main nail, the master nail on provided with screw hole and
Fixing screw hole, screw hole and fixing screw hole respectively positioned at main ailhead, tail both ends, lock screw through screw hole with
Main nail is fixedly connected, and lock screw head end is sharp, and lock screw rivet nut is provided with hangnail indentation close to head end.
The features of the present invention also resides in,
Non-degradable bioactive materials are the polybasic amino acids copolymer of fibre reinforced.
Lock screw is in 10-15 degree angles with main nail.
Fixing screw hole is two.
Lock screw tail end axial end is provided with groove.
Lock screw is connected through a screw thread with screw hole.
The invention has the advantages that it is of the invention by the way that lock screw and main nail are fixed, and in lock screw rivet nut
Hangnail indentation is set, the stress for acting on fracture site is undertaken completely by lock screw and main nail, so that fracture site
Bone piece keeps stable, prevents phenomena such as compression, screw are cut between coxa vara, fracture site, while avoid locking
Screw moves back nail, can clinically reduce the postoperative comminuted fracture broken ends of fractured bone shift again and caused by complication.And using non-degradable
Bioactive materials, rivet nut can be bonded with the bone tissue of human body and length is integrated, and therefore, be not required to second operation taking-up, greatly
The big pain for alleviating patient, reduces medical treatment cost.
Brief description of the drawings
Fig. 1 is the structural representation of PFN of the present invention；
Fig. 2 is locked out bolt structure schematic diagram.
In figure, 1. lock screws, 2. main nails, 3. fixing screw holes.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
A kind of PFN of the present invention, as shown in figure 1,2 are followed closely with main including the lock screw 1 for being screwed into neck of femur,
Lock screw 1 is made with main nail 2 of non-degradable bioactive materials, and the main nail 2 is provided with screw hole and fixation
Screw hole 3, screw hole and fixing screw hole 3 respectively positioned at it is main nail 2, tail both ends, lock screw 1 through screw hole with
Main nail 2 is fixedly connected, and the head end of lock screw 1 is sharp, and the rivet nut of lock screw 1 is provided with hangnail indentation close to head end, such as Fig. 2 institutes
Show.
Non-degradable bioactive materials are the polybasic amino acids copolymer of fibre reinforced.
Lock screw 1 is in 10-15 degree angles with main nail 2.
Fixing screw hole is two.
The tail end axial end of lock screw 1 is provided with groove.
Lock screw 1 is connected through a screw thread with screw hole.
Lock screw is locked directly in master and nailed on by the present invention, lock screw is produced cunning in screw hole
Move, when fixing unstable fracture using gamma nail, the stress for acting on fracture site is held by lock screw and main nail completely
Load, so that the bone piece of fracture site keeps stable, phenomena such as preventing compression between coxa vara, fracture site, screw cutting
Occur, while avoid lock screw moves back nail, can clinically reduce the postoperative comminuted fracture broken ends of fractured bone shift again and caused by
Complication.The hangnail indentation in the rivet nut of lock screw 1 can further prevent lock screw from loosening to slip simultaneously, and the groove of afterbody
It can separate, be flattened in outer surface after hammering into, prevent lock screw from caving in.
Bone screw is made with non-degradable bioactive materials, makes this bone screw that there is good side to learn performance, no
Degrade, can be fixed on for a long time in bone and fix synthetism, and because it has good biocompatibility and bioactivity, in people
During internal long-term existence, it can be bonded with the bone tissue of human body and grow and be integrated, it is therefore, living using non-degradable biology
Property material make bone screw, be not required to second operation taking-up after being implanted into human body, significantly reduce the pain of patient, reduce medical treatment into
This.
Claims (6)
1. a kind of PFN, it is characterised in that lock screw (1) and main nail (2), locking including being screwed into neck of femur
Screw (1) is made of non-degradable bioactive materials with main nail (2), and the main nail (2) is provided with screw hole and solid
Determine screw hole (3), screw hole and fixing screw hole (3) are respectively positioned at main nail (2) head, tail both ends, and lock screw (1) is through lock
Determine screw hole to be fixedly connected with main nail (2), lock screw (1) head end is sharp, and lock screw (1) rivet nut is provided with close to head end
Hangnail indentation.
A kind of 2. PFN according to claim 1, it is characterised in that the non-degradable bioactive materials
For the polybasic amino acids copolymer of fibre reinforced.
3. a kind of PFN according to claim 1, it is characterised in that the lock screw (1) and main nail
(2) it is in 10-15 degree angles.
4. a kind of PFN according to claim 1, it is characterised in that the fixing screw hole is two.
A kind of 5. PFN according to claim 1, it is characterised in that lock screw (1) the tail end axle
Groove is provided with to end face.
6. a kind of PFN according to claim 1, it is characterised in that the lock screw (1) and locking
Screw hole is connected through a screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711053772.1A CN107822701A (en) | 2017-10-31 | 2017-10-31 | A kind of PFN |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711053772.1A CN107822701A (en) | 2017-10-31 | 2017-10-31 | A kind of PFN |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107822701A true CN107822701A (en) | 2018-03-23 |
Family
ID=61650362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711053772.1A Pending CN107822701A (en) | 2017-10-31 | 2017-10-31 | A kind of PFN |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107822701A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010000186A1 (en) * | 1996-03-13 | 2001-04-05 | Bramlet Dale G. | Surgical fastener assembly |
| CN2726545Y (en) * | 2004-08-19 | 2005-09-21 | 中国人民解放军第二军医大学 | Nail with wing end and nailing device thereof |
| CN101703420A (en) * | 2009-11-10 | 2010-05-12 | 重庆医科大学 | Biologic active bone-setting screw |
| CN101779981A (en) * | 2010-02-25 | 2010-07-21 | 张磊 | Locking gamma nail |
-
2017
- 2017-10-31 CN CN201711053772.1A patent/CN107822701A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010000186A1 (en) * | 1996-03-13 | 2001-04-05 | Bramlet Dale G. | Surgical fastener assembly |
| CN2726545Y (en) * | 2004-08-19 | 2005-09-21 | 中国人民解放军第二军医大学 | Nail with wing end and nailing device thereof |
| CN101703420A (en) * | 2009-11-10 | 2010-05-12 | 重庆医科大学 | Biologic active bone-setting screw |
| CN101779981A (en) * | 2010-02-25 | 2010-07-21 | 张磊 | Locking gamma nail |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180323 |