CN2801080Y - Screwing-in type intramedullary pin - Google Patents
Screwing-in type intramedullary pin Download PDFInfo
- Publication number
- CN2801080Y CN2801080Y CN 200520058486 CN200520058486U CN2801080Y CN 2801080 Y CN2801080 Y CN 2801080Y CN 200520058486 CN200520058486 CN 200520058486 CN 200520058486 U CN200520058486 U CN 200520058486U CN 2801080 Y CN2801080 Y CN 2801080Y
- Authority
- CN
- China
- Prior art keywords
- pin
- screw
- rear end
- main nail
- purl
- 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.)
- Expired - Fee Related
Links
- 210000000988 bone and bone Anatomy 0.000 abstract description 12
- 241000221484 Tilletiaceae Species 0.000 abstract 1
- 230000008468 bone growth Effects 0.000 abstract 1
- 239000011295 pitch Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 208000010392 Bone Fractures Diseases 0.000 description 3
- 206010017076 Fracture Diseases 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 230000035876 healing Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008467 tissue growth Effects 0.000 description 2
- 208000002847 Surgical Wound Diseases 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 210000002745 epiphysis Anatomy 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000012010 growth Effects 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 108010048734 sclerotin Proteins 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
Images
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- Surgical Instruments (AREA)
Abstract
The utility model relates to a screwing-in type intramedullary pin which comprises a master pin and a locking pin, wherein one side of the master pin 1 is provided with an open slot which penetrates the whole pin and passes through the axle center; the front end and the rear end are respectively provided with screw thread segments with same gradient and different pitches; the rear end is also provided with a force application slot opening and a connection screw hole which are suitable to be connected with a force application handle. One side of the locking pin is provided with a linear blunt edge arranged in the open slot of the master pin. The other side is provided with sharp edges divided into different shapes; the front end is provided with a pyramidal pin point; the sharp edge of which the middle section is basically parallel to straight edge is provided with a pin body; the rear end is spread outwards to form a pin wing. The utility model also comprises a screw rod plug screwed in the connection screw hole; the front end of a screw rod bunts the rear end of the locking pin. The utility model adopts the screwing-in type screw rod plug with small cross section diameter on the rear end of the master pin, and thus, the screwing-in force application slot opening and the connection screw hole on the rear end of the master pin can be sealed so as to avoid the problem that the force application slot opening and the connection screw hole are sealed because of the bone growth when the bone heals. The intramedullary pin can be conveniently taken out after the screw rod plug is screwed off.
Description
[technical field]
This utility model relates to the orthopedic medical device field, particularly a kind of screw-in intramedullary pin.
[background technology]
Medical domain mainly adopts intramedullary pin and self-locking nail for the treatment of fracture repair at present, but most intramedullary pin adopts the method for squeezing into to go into nail, and part is fixed for horizontal interlocking.Because broken ends of fractured bone vibrations are big when squeezing into method and advancing to follow closely, easily cause fracture once more.Laterally need to carry out 4-6 skin incision and bone boring in the interlocking fixing operation, need monitoring of X line and sighting device location, its operating theater instruments and operation technique complexity, operating time is long, technical difficulty is big, is difficult to promote at the insufficient basic medical unit of surgical condition.At the deficiency of self-locking nail, but occur the intramedullary pin that a kind of screw-in advances nail on the market, comprised purl and main nail, can have clinical applicability more widely without X line monitoring of tools in the operation process.But existing screw-in intramedullary pin because of bone tissue growth, can be blocked the application of force notch of screw-in in bone healing finishing back because imbed bone, must do a large amount of cleaning works during taking-up, brings new misery to the wounded, and is very not convenient; On the other hand,, retreat looseningly easily, bring certain difficulty to locking because purl is taper wedging.
[summary of the invention]
The purpose of this utility model is to provide a kind of screw-in intramedullary pin, can overcome the defective of prior art.
The purpose of this utility model is achieved in that
A kind of screw-in intramedullary pin, comprise main nail and purl, one side of main nail 1 is provided with the open slot of crossing the axle center that connects full pin, and its rear and front end also is respectively equipped with the different thread section of same gradient, and its rear end also is provided with and adapts to the application of force notch that is connected with application of force handle and be connected screw; One side of purl is the linear type root face, places in the open slot of main nail; Opposite side is that sharp edge is segmented into difformity, and front end is the taper needle point, and the stage casing sharp edge substantially parallel with straight flange is needle body, outside the rear end generate wing be the pin wing; Also comprise the screw rod plug, be rotatably connected among the connection screw that its screw front end withstands the rear end of purl.
This utility model further comprises: the stage casing of described main nail also is provided with one section screw thread, and two sections thread segments of its gradient and front and back are identical.
This utility model further comprises: the tail end place of the linear root face of described purl bulges into an expanded letter shape afterbody, is provided with up and down two at this afterbody and beats and pull out the hole.
This utility model further comprises: main nail leading portion thread segment is the circle that has breach, long 30-100mm, the dark 1.0-2.0mm of screw thread, pitch 4-6mm; The back segment thread segment is trapezoidal, long 30-100mm, the dark 0.6-4mm of screw thread, pitch 3-5mm.
Because this utility model has adopted the less screw-in screw rod plug of diameter of section in main nail rear end, the screw-in application of force notch of having sealed main nail rear end be connected screw, seal application of force notch and the problem that is connected screw because of bone tissue growth in the time of can avoiding the bone healing, after the back-out of screw rod plug, can take out intramedullary pin easily.
[description of drawings]
Fig. 1 is that this utility model master follows closely the agent structure cutaway view;
Fig. 2 is main nail rearward end view;
Fig. 3 is this utility model purl main structure chart;
Fig. 4 is a screw rod plug structure sketch map;
Fig. 5 is the sketch map that the screw rod plug screws in main nail;
Fig. 6 is that this utility model is implanted the interior working state schematic representation of marrow.
[specific embodiment]
Below in conjunction with drawings and Examples this utility model is further elaborated:
This utility model is divided into main nail 1 and purl 7 and screw rod plug 9 three parts.Main nail 1 is used in combination with purl 7, and interlocking is fixed in pulp cavity, connects knochenbruch, and screw rod plug 9 is screwed in the rear end of main nail 1, prevents that main nail from retreating loosening.
Fig. 1 is to the structure that Figure 2 shows that main nail 1.One side of main nail 1 was provided with the open slot 2 in axle center, and the rearward end that groove 2 is made by oneself is through to fixed leading section.The rear and front end of main nail 1 and the screw thread of mid portion 10 are the trapezoidal of back-off, and its gradient is identical, are tendencies toward shrinkage toward the needle point direction.What the rear end of main nail 1 was provided with that sunk precession application of force notch 3 and inside is carved with screw thread is connected screw 4, to adapt to and being connected of application of force handle.
The thread segment of main nail leading portion 5 is notched circle, long 30-100mm, the dark 1.0-2.0mm of screw thread, pitch 4mm-6mm; Back segment 6 thread segments are trapezoidal, long 30-100mm, the dark 0.6-4mm of screw thread, pitch 3-5mm.Screw thread form helps to embed the epiphysis spongy bone from light to dark, plays certain supporting role.The width of groove 2 is 2.8-3mm on the main nail 1, and its degree of depth is determined according to the diameter of main nail 1.
Figure 3 shows that the structure of purl 7.One side of purl 7 is the linear type root face, and exhibition is used for inserting in the groove of main nail 1, combines with main nail 1, and the about 6mm in its rear end place bulges into a broad afterbody, beats and pulls out hole 8 for two about afterbody is provided with, and can be connected with injection-drawing out device; Another side is a sharp edge, helps to enter in the bone.The sharp edge segmentation is difformity, and front end is outstanding needle point, and the stage casing is substantially parallel with straight flange, and generate wing is the pin wing outside the about 50mm in the rear end place.
Figure 4 shows that a screw rod plug, can screw in the connection screw 4 of the rear end of main pin 1, as shown in Figure 5.During use, purl enters pulp cavity along the side channel of main nail, and the rear end of purl is parallel with the rear end of main nail, and top beating pulled out hole 8 and be exposed to outside the groove, and screw rod plug 9 clogs and connects screw 4, and its front end tightly withstands the rear end of main pin 1.
Figure 6 shows that this utility model master follows closely and purl is inserted the interior duty of bone.The vertical interlocking of main pin and purl firmly is fixed in the pulp cavity.
Main nail of the present utility model is by being threaded into pulp cavity, and its needle point is certain gradient, and the resistance when helping reducing nail into is selected into the far-end of fracture, and after nail was inserted, main nail played limited pressurization by the pitch difference of two ends and middle three sections screw threads.Purl enters pulp cavity along main nail groove, and after inserting, its rear end ridge withstands main nail, makes whole purl outstanding laterally, and its sharp edge and wing sword embed sclerotin, form self-locking.The screw rod plug screw in to connect screw 4, and its front end tightly withstands the rear end of main pin 1, prevent main pin 1 backward deactuate get loose.Prevent also that simultaneously the growth of intramedullary bone matter from blocking the connection screw, thereby cause the inconvenience when getting nail.Getting when nail only needs earlier the screw rod plug to be screwed out, and by pulling out the injection-drawing out device that the hole is connected purl is withdrawed from beating, by application of force notch main nail back-out is got final product then again.
This utility model is easy and simple to handle, and surgical wound is little, can prevent getting loose of main pin 1, simultaneously convenient disassembly.
Claims (4)
1, a kind of screw-in intramedullary pin, comprise main nail and purl, one side of main nail (1) is provided with the open slot (2) of crossing the axle center that connects full pin, its rear and front end also is respectively equipped with the different thread section (5,6) of same gradient, and its rear end also is provided with and adapts to the application of force notch (3) be connected with application of force handle and be connected screw (4); One side of purl (7) is the linear type root face, places in the open slot (2) of main nail (1); Opposite side is that sharp edge is segmented into difformity, and front end is the taper needle point, and the stage casing sharp edge substantially parallel with straight flange is needle body, outside the rear end generate wing be the pin wing; It is characterized in that: also comprise screw rod plug (9), be rotatably connected among the connection screw (4) that its screw front end withstands the rear end of purl (7).
2, screw-in intramedullary pin according to claim 1 is characterized in that: the stage casing of described main nail (1) also is provided with one section screw thread (10), and the two sections thread segments in its gradient and front and back (5,6) are identical.
3, screw-in intramedullary pin according to claim 1 is characterized in that: the tail end place of the linear root face of described purl (7) bulges into an expanded letter shape afterbody, is provided with up and down two at this afterbody and beats and pull out hole (8).
4, according to the described screw-in intramedullary pin of above-mentioned arbitrary claim, it is characterized in that: main nail (1) leading portion (5) thread segment is the circle that has breach, long 30-100mm, the dark 1.0-2.0mm of screw thread, pitch 4-6mm; Back segment (6) thread segment is trapezoidal, long 30-100mm, the dark 0.6-4mm of screw thread, pitch 3-5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520058486 CN2801080Y (en) | 2005-05-23 | 2005-05-23 | Screwing-in type intramedullary pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520058486 CN2801080Y (en) | 2005-05-23 | 2005-05-23 | Screwing-in type intramedullary pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2801080Y true CN2801080Y (en) | 2006-08-02 |
Family
ID=36845783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520058486 Expired - Fee Related CN2801080Y (en) | 2005-05-23 | 2005-05-23 | Screwing-in type intramedullary pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2801080Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9974586B2 (en) | 2010-06-07 | 2018-05-22 | Carbofix Orthopedics Ltd. | Composite material bone implant |
| US10028777B2 (en) | 2009-01-16 | 2018-07-24 | Carbofix Orthopedics Ltd. | Composite material bone implant |
| US10154867B2 (en) | 2010-06-07 | 2018-12-18 | Carbofix In Orthopedics Llc | Multi-layer composite material bone screw |
| CN109171920A (en) * | 2018-10-08 | 2019-01-11 | 大泗医疗生物科技有限公司 | Ankle fusion structure and joint fusion device |
| US10617458B2 (en) | 2015-12-23 | 2020-04-14 | Carbofix In Orthopedics Llc | Multi-layer composite material bone screw |
-
2005
- 2005-05-23 CN CN 200520058486 patent/CN2801080Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10028777B2 (en) | 2009-01-16 | 2018-07-24 | Carbofix Orthopedics Ltd. | Composite material bone implant |
| US9974586B2 (en) | 2010-06-07 | 2018-05-22 | Carbofix Orthopedics Ltd. | Composite material bone implant |
| US10154867B2 (en) | 2010-06-07 | 2018-12-18 | Carbofix In Orthopedics Llc | Multi-layer composite material bone screw |
| US10849668B2 (en) | 2010-06-07 | 2020-12-01 | Carbofix Orthopedics Ltd. | Composite material bone implant |
| US10617458B2 (en) | 2015-12-23 | 2020-04-14 | Carbofix In Orthopedics Llc | Multi-layer composite material bone screw |
| CN109171920A (en) * | 2018-10-08 | 2019-01-11 | 大泗医疗生物科技有限公司 | Ankle fusion structure and joint fusion device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN CITY WALD SURGICAL MEDICAL EQUIPMENT TEC Free format text: FORMER OWNER: YANG LIQUN Effective date: 20081107 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081107 Address after: Shenzhen City, Longgang District, Liuzhou Ping Road West Dongping Pioneer Park on the third floor, zip code: 518000 Patentee after: Shenzhen World Surgery Medical Device Technology Co., Ltd. Address before: Room 1804, Huafeng building, No. 6006 Shennan Avenue, Guangdong, Shenzhen Province, China: 518034 Patentee before: Yang Liqun |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |