CN207012227U - A kind of near-end to match with marrow cavity of femur form fixes intramedullary nail - Google Patents
A kind of near-end to match with marrow cavity of femur form fixes intramedullary nail Download PDFInfo
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- CN207012227U CN207012227U CN201720150918.3U CN201720150918U CN207012227U CN 207012227 U CN207012227 U CN 207012227U CN 201720150918 U CN201720150918 U CN 201720150918U CN 207012227 U CN207012227 U CN 207012227U
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Abstract
The utility model embodiment discloses a kind of near-end to match with marrow cavity of femur form and fixes intramedullary nail, perfect matching can not be carried out for solving the geometric shape of intramedullary nail form of the prior art and femoral bone cavitas medullaris, easily distorted in implantation process, it is difficult to meet good biomethanics requirement, and fixed unstable easily generation loosens and the unbalanced technical problem for easily causing main nail fracture of power.The utility model embodiment includes：Main nail, the first nail, the second nail；The main shaft of main nail is identical with the main shaft of marrow cavity of femur, and the upper end edge main shaft direction of main nail is provided with adjacent first through hole and the second through hole；For first nail through being fixed in first through hole, the angle of the first nail and main nail is 103 °~117 °；For second nail through being fixed in the second through hole, the angle of the second nail and main nail is 138 °~150 °.
Description
Technical field
The utility model is related to orthopedic medical device field, more particularly to it is a kind of match with marrow cavity of femur form it is near
The fixed intramedullary nail in end.
Background technology
Femur is the maximum elongated tubular stock of human body, in human body lower limbs thigh, carries all of human body top half
Weight, near-end participate in composition hip joint connection basin bone, and distal end participates in composition knee joint connection calf shank.But Diaphysial disease,
Fracture phenomenon occurs often.
Locking steel plate inner fixation treatment of femoral shaft fractures and intramedullary nail treatment fracture of femoral shaft are that current two kinds are mainly controlled
Treatment mode.Fixed locking steel plate is that fracture area is fixed femur external edge surface using fixing steel plate, to fracture into
Row treatment.Intramedullary nail treatment, it is that femur is positioned using in steel nail insertion femoral bone cavitas medullaris, femoral fracture is treated.
For the fracture for the special tibia sites that can not apply intramedullary nail, Interal fixation can not still replace, but intramedullary nail is also increasingly
It is widely used in the treatment of fracture of tibia.
However, its primary stability and biomethanics fixed effect thereafter are undesirable after intramedullary nail implantation at present, often
Phenomena such as generation loosens, sinks, rotates and collapsed.Related mechanics study shows, is implanted into the form and femoral bone cavitas medullaris of intramedullary nail
Form be mutually matched, the transmission of load forces can be made to more conform to psychological need.Avoid because interface produces between implant and bone
Tangential motion and the loosening for causing implant, the problems such as reducing stress shielding.
During clinical operation, doctor need constantly to contrast implant, moulding (bending cut etc.) not only hand
The art time is grown, and effect is poor, and also add the pain degree of patient.In addition femoral bone cavitas medullaris is an irregular conical pipe
Chamber, femoral bone cavitas medullaris is into irregular curve form, and from the close-by examples to those far off, the major axis of tomography is into outward turning trend, this distortion near end of thighbone
The presence of angle, it certainly will cause to rotate among expansion marrow and implant security protection process, cause the change of top rake, it is in addition existing
Some intramedullary nails are approximately vertical state more, cause the matching completely of implant and femoral bone cavitas medullaris more difficult.
Intramedullary nail used in Current Domestic is mostly import or copies foreign country, but the parameter of Chinese and western femur measurement
It is different, so using this imitated external intramedullary nail matched well can not be carried out with state's human femur.The present country has
A little medicine equipment producers design intramedullary nail according to the femur parameter and standard of compatriots, and set different size.But due between patient
Individual difference, the needs of morphological requirements of intramedullary nail still can not meet between Different Individual.
To sum up, the fixation of existing intramedullary nail mainly has problems with：
1. the main nail fracture of intramedullary nail, discontinuity equalization；
2. Intramedullary nailing is unstable, the implantation later stage can produce loosening；
3. the form of intramedullary nail and the geometric shape of femoral bone cavitas medullaris can not carry out perfect matching, easily occur in implantation process
Distortion, it is difficult to meet good biomethanics requirement.
Utility model content
The utility model embodiment provides a kind of near-end to match with marrow cavity of femur form and fixes intramedullary nail, solves
Intramedullary nail form of the prior art and the geometric shape of femoral bone cavitas medullaris can not carry out perfect matching, easily go out in implantation process
Now distort, it is difficult to meet good biomethanics requirement, and fixed unstable easily produce loosens and power is unbalanced easily causes
The technical problem of main nail fracture.
The near-end that a kind of and marrow cavity of femur form that the utility model embodiment provides matches fixes intramedullary nail, bag
Include：
Main nail, the first nail, the second nail；
The main shaft of main nail is identical with the main shaft of marrow cavity of femur, and the upper end edge main shaft direction of main nail is provided with adjacent
First through hole and the second through hole；
For first nail through being fixed in first through hole, the angle of the first nail and main nail is 103 °~117 °；
For second nail through being fixed in the second through hole, the angle of the second nail and main nail is 138 °~150 °.
Alternatively, main nail is connected and composed by the cylinder no less than two sections and one section of centrum, and centrum is located at the lower end of main nail；
The sectional area of one end of cylinder is more than the sectional area of the sectional area, the two-by-two joint face between adjacent cylinder of the other end
Unanimously.
Alternatively, centrum is provided with no less than two through holes being vertically arranged along radial direction.
Alternatively, the axis two-by-two between adjacent through hole is mutually perpendicular to；
Centrum is internally provided with the hollow via-hole on vertical direction, and hollow via-hole is ganged up between through hole adjacent two-by-two.
Alternatively, the upper semisection part of main nail is hollow structure, and the middle vacancy bottom of main nail is provided with hollow bore.
Alternatively, the first nail is cylindrical structural, and the first nail is internally provided with cylindrical hole；
First nail is provided at both ends with the first screw thread and the second screw thread, and the parameter of the first screw thread and the second screw thread is consistent, ginseng
Number includes rotation direction, pitch, radius；
First screw thread is used to be connected with marrow cavity of femur, and the second screw thread is used to be connected with main nail.
Alternatively, the front end of the first nail is provided with 30 °~45 ° of inclination angle, and the tail end of the first nail is provided with cross
Groove.
Alternatively, the second nail is cylindrical structural, and the second nail is internally provided with cylindrical hole；
The front end of second nail is provided with helicla flute, and the tail end of the second nail is provided with the 3rd screw thread and cross recess.
Alternatively, helicla flute is identical with the rotation direction of the 3rd screw thread, and helicla flute is provided with 30 °~35 ° of inclination angle.
Alternatively, in addition to：Sealing nail；
Sealing nail is connected by screw thread with the top of main nail, for being sealed to main nail.
As can be seen from the above technical solutions, the utility model embodiment has advantages below：
The utility model embodiment provides a kind of near-end to match with marrow cavity of femur form and fixes intramedullary nail, bag
Include：Main nail, the first nail, the second nail；The main shaft of main nail is identical with the main shaft of marrow cavity of femur, the upper end edge master of main nail
Axis direction is provided with adjacent first through hole and the second through hole；First nail, which runs through, to be fixed in first through hole, the first nail
Angle with main nail is 103 °~117 °；Through being fixed in the second through hole, the angle of the second nail and main nail is second nail
138 °~150 °, by being designed the geometric form of main nail according to the geometric shape of marrow cavity of femur in the utility model embodiment
State, the axis of main nail and the axis co-axial of ossis, outer surface can and ossis form it is similar, when being implanted in marrow cavity of femur
The stability of implant with the matching that good geometric shape is realized in marrow cavity of femur, can be improved, reduces and loosens, improve implantation
Effect, the first nail and the second nail are fixed with main nail and form angle, and the structure that three follows closely one triangle of composition is more steady
It is fixed, more preferable fixation can be formed to fracture area, situation about loosening with nail shear fracture is reduced, solves of the prior art
Intramedullary nail form and the geometric shape of femoral bone cavitas medullaris can not carry out perfect matching, easily be distorted in implantation process, it is difficult to full
The good biomethanics requirement of foot, and fixed unstable easily generation loosens and the unbalanced technology for easily causing main nail fracture of power
Problem.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, before creative labor is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is that the near-end that a kind of and marrow cavity of femur form that the utility model embodiment provides matches fixes intramedullary nail
Structural representation；
Fig. 2 is a kind of diagrammatic cross-section for main nail that the utility model embodiment provides；
Fig. 3 is a kind of schematic appearance for main nail that the utility model embodiment provides；
Fig. 4 is a kind of schematic appearance for first nail that the utility model embodiment provides；
Fig. 5 is a kind of diagrammatic cross-section for first nail that the utility model embodiment provides；
Fig. 6 is a kind of schematic appearance for second nail that the utility model embodiment provides；
Fig. 7 is a kind of diagrammatic cross-section for second nail that the utility model embodiment provides.
Embodiment
The utility model embodiment provides a kind of near-end to match with marrow cavity of femur form and fixes intramedullary nail, is used for
Perfect matching can not be carried out by solving the geometric shape of intramedullary nail form of the prior art and femoral bone cavitas medullaris, in implantation process easily
Distort, it is difficult to meet good biomethanics requirement, and fix unstable easily generation loosening and the unbalanced easily cause of power
Make the technical problem of main nail fracture.
Referring to Fig. 1, a kind of near-end to match with marrow cavity of femur form that the utility model embodiment provides is fixed
Intramedullary nail, including：
The 1, first nail 2 of main nail, the second nail 3, sealing nail 4；
The diagrammatic cross-section followed closely based on referring to Fig. 2,；The schematic appearance followed closely based on referring to Fig. 3,.The surface of main nail 1
Geometric shape designs according to the geometry of marrow cavity of femur, and the main shaft of main nail 1 is identical with the main shaft of marrow cavity of femur, its
It is the face of cylinder composition for becoming radius by multistage, successively decreases successively from top to bottom, and its bottom is centrum.The main nail 1 so designed,
Realize when the form for being implanted to marrow cavity of femur interior energy and ossis and perfectly match, make to fix and more stablize, reduce gravitation collection
The problem of middle.1 lower part of main nail is provided with several through holes along radial direction, and the axis between upper and lower two different through holes is mutual
Vertical, and the through hole for having a vertical direction among every layer of through hole gangs up them.Intramedullary nail intensity can so be ensured
In the case of, reduce its weight.And these through holes can deposit some bone scraps when intramedullary nail is implanted into, be advantageous to stimulate stock
Symphysis.The main nail also generally hollow structure of 1 upper semisection, in order to mitigate weight and be provided with a through hole in middle vacancy bottom, is prevented
Airtight cavity is internally formed in main nail 1.1 top of main nail is connected through a screw thread to be connected with sealing nail 4.Upper end two through hole is used to pacify
The first nail 2, the second nail 3 are filled, main nail 1, which enters to follow closely end, the threaded connection to match with the first nail 2 and the second nail 3.The
The angle of one nail 3 and main nail 1 is 103 °~117 °, and the angle between the second nail 2 and main nail 1 is 138 °~150 °.
Referring to Fig. 4, the schematic appearance for the first nail；Referring to Fig. 5, the diagrammatic cross-section for the first nail.The
One nail 2, generally cylindrical, there is a cylindrical hole centre.There is a screw thread at both ends, and the parameter of both ends screw thread it is identical (rotation direction,
The parameters such as pitch, radius), first paragraph screw thread is connected to be formed with marrow cavity of femur, and second segment screw thread is used for the first bone
It is fixed between nail 2 and main nail 1.The front end of first nail 2 is provided with 30~45 degree of inclination angle, and tail end is provided with cross recess.
Referring to Fig. 6, the schematic appearance for the second nail；Referring to Fig. 7, the diagrammatic cross-section for the second nail.The
For two nails 3 integral into cylinder, there is a cylindrical hole centre, and tail end has is used for connection and fixation with main nail provided with screw thread, together
When tail end be also equipped with cross recess, used when installing during for being implanted into.Second nail front end is provided with helicla flute, be its in ossis
Middle some pretightning forces of increase, improve stability, prevent its loosening, front end helicla flute is identical with the rotation direction of the screw thread of afterbody, preceding
There is 30~35 degree of inclination angle at the helicla flute of end.
The bottom of sealing nail 4 has screw thread and 1 screw top of main nail to be coordinated, and 1 upper end of main nail is sealed.
Sealing nail 4, the first nail 2 and the second nail 3 are not in contact between each other.First nail 2, the second nail 3, sealing
Nail 4 is fixed by itself screw thread and main nail 1.
Intramedullary nail is fixed to a kind of near-end to match with marrow cavity of femur form provided by the utility model above to enter
Go and be discussed in detail, for those of ordinary skill in the art, according to the thought of the utility model embodiment, in specific embodiment party
There will be changes in formula and application, in summary, this specification content should not be construed as to limit of the present utility model
System.
Claims (10)
1. a kind of near-end to match with marrow cavity of femur form fixes intramedullary nail, it is characterised in that including：
Main nail, the first nail, the second nail；
The main shaft of the main nail is identical with the main shaft of marrow cavity of femur, and the upper end edge main shaft direction of the main nail is provided with
Adjacent first through hole and the second through hole；
First nail through being fixed in the first through hole, the angle of first nail and the main nail is 103 °~
117°；
Second nail through being fixed in second through hole, the angle of second nail and the main nail is 138 °~
150°。
2. the near-end according to claim 1 to match with marrow cavity of femur form fixes intramedullary nail, it is characterised in that institute
State main nail to be connected and composed by the cylinder no less than two sections and one section of centrum, the centrum is located at the lower end of the main nail；
The sectional area of one end of the cylinder is more than the sectional area of the other end, two-by-two section of the joint face between the adjacent cylinder
Area is consistent.
3. the near-end according to claim 2 to match with marrow cavity of femur form fixes intramedullary nail, it is characterised in that institute
State centrum and radial direction is provided with no less than two through holes being vertically arranged.
4. the near-end according to claim 3 to match with marrow cavity of femur form fixes intramedullary nail, it is characterised in that two
Axis between the two adjacent through holes is mutually perpendicular to；
The centrum is internally provided with the hollow via-hole on vertical direction, and the hollow via-hole is ganged up in adjacent described logical two-by-two
Between hole.
5. the near-end according to claim 4 to match with marrow cavity of femur form fixes intramedullary nail, it is characterised in that institute
The upper semisection part for stating main nail is hollow structure, and the middle vacancy bottom of the main nail is provided with hollow bore.
6. the near-end according to claim 5 to match with marrow cavity of femur form fixes intramedullary nail, it is characterised in that institute
It is cylindrical structural to state the first nail, and first nail is internally provided with cylindrical hole；
First nail is provided at both ends with the parameter of the first screw thread and the second screw thread, first screw thread and second screw thread
Unanimously, the parameter includes rotation direction, pitch, radius；
First screw thread is used to be connected with marrow cavity of femur, and second screw thread is used to be connected with the main nail.
7. the near-end according to claim 6 to match with marrow cavity of femur form fixes intramedullary nail, it is characterised in that institute
The front end for stating the first nail is provided with 30 °~45 ° of inclination angle, and the tail end of first nail is provided with cross recess.
8. the near-end according to claim 7 to match with marrow cavity of femur form fixes intramedullary nail, it is characterised in that institute
It is cylindrical structural to state the second nail, and second nail is internally provided with cylindrical hole；
The front end of second nail is provided with helicla flute, and the tail end of second nail is provided with the 3rd screw thread and cross recess.
9. the near-end according to claim 8 to match with marrow cavity of femur form fixes intramedullary nail, it is characterised in that institute
It is identical with the rotation direction of the 3rd screw thread to state helicla flute, the helicla flute is provided with 30 °~35 ° of inclination angle.
10. the near-end according to claim 9 to match with marrow cavity of femur form fixes intramedullary nail, it is characterised in that
Also include：Sealing nail；
The sealing nail is connected by screw thread with the top of the main nail, for being sealed to the main nail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720150918.3U CN207012227U (en) | 2017-02-20 | 2017-02-20 | A kind of near-end to match with marrow cavity of femur form fixes intramedullary nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720150918.3U CN207012227U (en) | 2017-02-20 | 2017-02-20 | A kind of near-end to match with marrow cavity of femur form fixes intramedullary nail |
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| Publication Number | Publication Date |
|---|---|
| CN207012227U true CN207012227U (en) | 2018-02-16 |
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| CN201720150918.3U Active CN207012227U (en) | 2017-02-20 | 2017-02-20 | A kind of near-end to match with marrow cavity of femur form fixes intramedullary nail |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106618710A (en) * | 2017-02-20 | 2017-05-10 | 广东工业大学 | Proximal fixation intramedullary nail matched with femur medullary cavity in shape |
| CN108771561A (en) * | 2018-07-09 | 2018-11-09 | 常州华森医疗器械有限公司 | A kind of anti-rotation type intramedullary nail |
-
2017
- 2017-02-20 CN CN201720150918.3U patent/CN207012227U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106618710A (en) * | 2017-02-20 | 2017-05-10 | 广东工业大学 | Proximal fixation intramedullary nail matched with femur medullary cavity in shape |
| CN108771561A (en) * | 2018-07-09 | 2018-11-09 | 常州华森医疗器械有限公司 | A kind of anti-rotation type intramedullary nail |
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