CN115645018A - Intramedullary lengthening device for neck of femur - Google Patents
Intramedullary lengthening device for neck of femur Download PDFInfo
- Publication number
- CN115645018A CN115645018A CN202211227345.1A CN202211227345A CN115645018A CN 115645018 A CN115645018 A CN 115645018A CN 202211227345 A CN202211227345 A CN 202211227345A CN 115645018 A CN115645018 A CN 115645018A
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- Prior art keywords
- femoral neck
- steel plate
- umbrella
- guide rod
- rod
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- 210000000689 upper leg Anatomy 0.000 title description 5
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical group [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims abstract description 29
- 210000002436 femur neck Anatomy 0.000 claims abstract description 21
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 230000002035 prolonged effect Effects 0.000 claims description 5
- 239000002086 nanomaterial Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 10
- 230000003203 everyday effect Effects 0.000 description 6
- 230000001976 improved effect Effects 0.000 description 6
- 230000017074 necrotic cell death Effects 0.000 description 6
- 208000032170 Congenital Abnormalities Diseases 0.000 description 5
- 206010061619 Deformity Diseases 0.000 description 5
- 230000017531 blood circulation Effects 0.000 description 4
- 201000010099 disease Diseases 0.000 description 4
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 4
- 208000010392 Bone Fractures Diseases 0.000 description 3
- 206010017076 Fracture Diseases 0.000 description 3
- 208000001132 Osteoporosis Diseases 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000010478 bone regeneration Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 210000004394 hip joint Anatomy 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 229910052715 tantalum Inorganic materials 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000035876 healing Effects 0.000 description 2
- 210000001624 hip Anatomy 0.000 description 2
- 238000002513 implantation Methods 0.000 description 2
- 230000008338 local blood flow Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 210000001694 thigh bone Anatomy 0.000 description 2
- 230000004087 circulation Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 210000002082 fibula Anatomy 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 230000001338 necrotic effect Effects 0.000 description 1
- 230000011164 ossification Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 238000002054 transplantation Methods 0.000 description 1
Images
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- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a femoral neck intramedullary lengthening device in the technical field of medical instruments, which comprises a steel plate, wherein a guide rod is connected onto the steel plate in a threaded manner, a nut is rotatably connected onto the guide rod, second sealing rings are respectively arranged at the front end and the rear end of the inner wall of the guide rod, an extension rod is slidably connected into the guide rod, a first thread section and a second thread section are respectively arranged at two ends of the extension rod, the first thread section is movably connected with the nut, a base is movably connected onto the second thread section, a porous umbrella tantalum structure is arranged on the base, a plurality of mounting holes are formed in the steel plate, and bone nails are arranged in the mounting holes.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a femoral neck intramedullary lengthening device.
Background
After the neck of femur is fractured, internal fixation failures such as screw withdrawal and screw breakage can occur due to poor fracture reduction, insufficient internal fixation mechanical support, osteoporosis and the like, so that the neck length of the femur is lost, the femoral head is necrotic and the like, hip mechanics is changed, and patients often need to perform artificial hip joint replacement treatment.
For the treatment of the disease conditions such as femoral neck nonunion, deformity healing, or femoral head necrosis, etc., at present, there is no clear and effective treatment mode, such as broken end bone grafting, fibula valve transplantation, etc., and only aiming at the improvement of blood circulation of broken ends of fracture and femoral head necrosis, the treatment effects of fracture healing and hip protection are obtained accordingly, but the current treatment modes can not improve the disease conditions such as femoral neck shortening, deformity, etc., so the disease conditions such as hip joint deformity, mechanics abnormality, etc. exist for a long time, which is obviously unacceptable for young patients.
Based on this, the present invention has devised an intramedullary lengthening device of femoral neck to solve the above-mentioned problems.
Disclosure of Invention
The present invention is to provide a femoral neck intramedullary lengthening device, which solves the problem that the disease conditions such as hip joint deformity and mechanical abnormality caused by femoral neck shortening and deformity, which are not improved by the treatment methods proposed in the background art, exist for a long time.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a thighbone neck intramedullary extension fixture, includes the steel sheet, threaded connection has the guide bar on the steel sheet, it is connected with the nut to rotate on the guide bar, both ends all are equipped with the second sealing ring around the guide bar inner wall, sliding connection has the extension rod in the guide bar, the extension rod both ends are equipped with first screw thread section and second screw thread section respectively, first screw thread section and nut swing joint, swing joint has the base in the second screw thread section, be equipped with porous umbrella tantalum structure on the base, a plurality of mounting holes have been seted up on the steel sheet, be equipped with the bone nail in the mounting hole.
Preferably, the guide rod is installed in an inclined manner, and an included angle between the guide rod and the steel plate is 125 °.
Preferably, a first sealing ring is arranged at the threaded connection position of the guide rod and the steel plate.
Preferably, the nut is provided with a rubber anti-slip layer, and the inner side of the steel plate is arc-shaped.
Preferably, the middle part of the extension rod is a smooth rod, and the extension rod is positioned inside the two second sealing rings.
Preferably, the porous umbrella tantalum structure comprises expandable umbrella wings, and the expandable umbrella wings are expanded to enable the porous umbrella tantalum structure to be in a circular truncated cone shape.
Preferably, the base and the porous umbrella tantalum structure are integrated, and some through holes formed in the base are smaller than those formed in the porous umbrella tantalum structure.
Preferably, the diameter of the bone nail is 3.5mm, the surface of the guide rod is coated with a nano material, and the length of the guide rod is prolonged to the outside of the skin.
Compared with the prior art, the invention has the beneficial effects that:
the invention makes the installation, use and disassembly of the device more convenient by mutually matching the steel plate, the guide rod, the extension rod, the base, the porous umbrella tantalum structure and other parts in the device, and each part in the device is mutually matched, and the rotating bolt is twisted for 0.75-1 turn every day to generate the femoral neck extension effect of 0.75-1mm every day, meanwhile, by means of the effects of promoting bone regeneration, improving local blood circulation and the like of the bone traction technology, the femoral head blood circulation is improved while the femoral neck is prolonged and reshaped, and the conditions of femoral head necrosis and the like are avoided. In addition, in the femoral head part, the invention specially designs an umbrella-shaped structure (porous umbrella-shaped tantalum structure) made of porous tantalum material, which can generate a proper opening effect in the process of implantation to wrap more cancellous bone structures, enlarge the stress area and avoid malignant results such as internal fixation loosening and cutting caused by osteoporosis and the like in the head.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a front side view angle of the present invention;
FIG. 2 is a schematic structural diagram of a rear side view angle of the present invention;
FIG. 3 is a schematic view of a partial front side view of the present invention;
FIG. 4 is a schematic view of the internal structure of a partial front side view angle of the present invention;
fig. 5 is an installation schematic of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. a steel plate; 2. a guide bar; 3. a first seal ring; 4. a nut; 5. a second seal ring; 6. an extension pole; 7. a first thread segment; 8. a second thread segment; 9. a porous umbrella tantalum structure; 10. a base; 11. bone nails; 12. the femoral head.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution:
the utility model provides a thighbone neck intramedullary extension fixture, includes the steel sheet, threaded connection has the guide bar on the steel sheet, it is connected with the nut to rotate on the guide bar, both ends all are equipped with the second sealing ring around the guide bar inner wall, sliding connection has the extension rod in the guide bar, the extension rod both ends are equipped with first screw thread section and second screw thread section respectively, first screw thread section and nut swing joint, swing joint has the base in the second screw thread section, be equipped with porous umbrella tantalum structure on the base, a plurality of mounting holes have been seted up on the steel sheet, be equipped with the bone nail in the mounting hole.
The guide rod is obliquely arranged, and the included angle between the guide rod and the steel plate is 125 degrees; the supporting force of the porous umbrella tantalum structure is convenient to improve.
Wherein a first sealing ring is arranged at the threaded connection part of the guide rod and the steel plate; the sealing performance between the guide rod and the steel plate is improved.
The nut is provided with a rubber anti-slip layer, and the inner side of the steel plate is arc-shaped; the rotation of the nut is convenient for operators to adjust, and the arc shape is beneficial to the fitting of the steel plate and the femoral head.
The middle part of the extension rod is a smooth rod, and the extension rod is positioned on the inner sides of the two second sealing rings; effectively increase the leakproofness between extension rod and the guide bar.
The porous umbrella tantalum structure comprises expandable umbrella wings, and the expandable umbrella wings are unfolded to enable the porous umbrella tantalum structure to be in a circular truncated cone shape; the 'bone eating quantity' of the porous umbrella tantalum structure is increased when the porous umbrella tantalum structure is pushed, and the bone cutting is avoided.
The base and the porous umbrella tantalum structure are integrated, and through holes formed in the base are smaller than through holes formed in the porous umbrella tantalum structure; the porosity of the base portion is slightly reduced, so that the strength of the base is higher, and the stability of the base is improved.
The diameter of the bone nail is 3.5mm, the surface of the guide rod is coated with a nano material, and the length of the guide rod is prolonged to the outside of the skin; due to the fact that the stability of the steel plate is improved, the guide rod is convenient to assemble and disassemble.
The working principle is as follows:
opening the neck of a femur, cleaning the broken end to flatten the broken end, recovering the bone surface blood circulation, drilling a hole in a femoral head 12, implanting a porous umbrella-shaped tantalum structure 9, adjusting the position to be proper, placing a steel plate 1 and connecting a guide rod 2 in a threaded manner, then placing an extension rod 6 in the guide rod 2, connecting a second threaded section 8 on the guide rod 2 with a base 10 in a threaded manner, at the moment, enabling the porous umbrella-shaped tantalum structure 9, the base 10 and the extension rod 6 to be integrated, then connecting a first threaded section 7 on the extension rod 6 with a nut 4, finally installing a bone nail 11 on the steel plate 1, connecting the bone nail 11 with the femoral head 12, completing the installation of equipment, then twisting the bolt 0.75-1 circle every day to generate a femoral neck extension effect of 0.75-1mm every day, simultaneously, improving the bone regeneration, improving the local blood circulation and the like by means of a bone traction technology, improving the blood circulation of the femoral head 12 while extending the femoral neck and remodeling, avoiding the occurrence of necrosis of 12 and the like, reversely rotating the extension rod 6, enabling the extension rod 6 and the base 10 to be separated from the guide rod 2, and then reversely rotating the guide rod 1;
the steel plate 1, the guide rod 2, the extension rod 6, the base 10, the porous umbrella tantalum structure 9 and other parts in the equipment are mutually matched, so that the equipment is more convenient to install, use and disassemble, all the parts in the equipment are mutually matched, the rotating bolt is twisted for 0.75-1 circle every day, the femoral neck extension effect of 0.75-1mm every day is generated, meanwhile, the effects of promoting bone regeneration, improving local blood transportation and the like by means of a bone traction technology are achieved, when the femoral neck is prolonged and remolded, the blood transportation of the femoral head 12 is improved, and the conditions of femoral head 12 necrosis and the like are avoided. In addition, in the femoral head 12 part, the invention specially designs an umbrella-shaped structure (porous umbrella tantalum structure 9) made of porous tantalum material, which can generate a proper opening effect in the process of implantation to wrap more cancellous bone structures, enlarge the stress area and avoid the vicious results of internal fixation loosening, excision and the like caused by osteoporosis and the like in the head, and secondly, the porous tantalum structure is proved to have the advantages of inducing osteogenesis, being beneficial to bone conduction, promoting the improvement of circulation and the like, and is widely used for the treatment of early femoral head 12 necrosis, so that a more remarkable treatment effect can be generated, the equipment has practicability in use, is more convenient in treatment and further improves the treatment effect of the equipment.
Claims (8)
1. A femoral neck intramedullary lengthening device, comprising a steel plate (1), characterized in that: threaded connection has guide bar (2) on steel sheet (1), it is connected with nut (4) to rotate on guide bar (2), both ends all are equipped with second sealing ring (5) around guide bar (2) inner wall, sliding connection has extension rod (6) in guide bar (2), extension rod (6) both ends are equipped with first screw thread section (7) and second screw thread section (8) respectively, first screw thread section (7) and nut (4) swing joint, swing joint has base (10) on second screw thread section (8), be equipped with porous umbrella tantalum structure (9) on base (10), a plurality of mounting holes have been seted up on steel sheet (1), be equipped with bone nail (11) in the mounting hole.
2. A femoral neck intramedullary extension device according to claim 1, wherein: the guide rod (2) is installed in an inclined mode, and an included angle formed between the guide rod (2) and the steel plate (1) is 125 degrees.
3. A femoral neck intramedullary lengthening device according to claim 1, wherein: and a first sealing ring (3) is arranged at the threaded connection part of the guide rod (2) and the steel plate (1).
4. A femoral neck intramedullary extension device according to claim 1, wherein: the anti-skid steel plate is characterized in that a rubber anti-skid layer is arranged on the nut (4), and the inner side of the steel plate (1) is arc-shaped.
5. A femoral neck intramedullary extension device according to claim 1, wherein: the middle part of the extension rod (6) is a smooth rod, and the extension rod (6) is positioned on the inner sides of the two second sealing rings (5).
6. A femoral neck intramedullary extension device according to claim 1, wherein: the porous umbrella tantalum structure (9) comprises expandable umbrella wings, and the expandable umbrella wings are expanded to enable the porous umbrella tantalum structure (9) to be in a circular truncated cone shape.
7. A femoral neck intramedullary extension device according to claim 1, wherein: the base (10) and the porous umbrella tantalum structure (9) are integrated, and through holes formed in the base (10) are smaller than through holes formed in the porous umbrella tantalum structure (9).
8. A femoral neck intramedullary extension device according to claim 1, wherein: the diameter of the bone nail (11) is 3.5mm, the surface of the guide rod (2) is coated with a nano material, and the length of the guide rod (2) is prolonged to the outside of the skin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211227345.1A CN115645018B (en) | 2022-10-09 | 2022-10-09 | Femoral neck intramedullary extension device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211227345.1A CN115645018B (en) | 2022-10-09 | 2022-10-09 | Femoral neck intramedullary extension device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115645018A true CN115645018A (en) | 2023-01-31 |
| CN115645018B CN115645018B (en) | 2024-04-16 |
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ID=84987348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211227345.1A Active CN115645018B (en) | 2022-10-09 | 2022-10-09 | Femoral neck intramedullary extension device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115645018B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030065399A1 (en) * | 2001-10-02 | 2003-04-03 | Brannon James Kevin | Biaxial core compression |
| US20070173838A1 (en) * | 2006-01-12 | 2007-07-26 | Kung-Chia Li | Femoral head and neck strengthening device |
| CN201040014Y (en) * | 2007-04-26 | 2008-03-26 | 高俊 | Double-nail locking nail-plate device for treating femur neck fracture |
| CN102793579A (en) * | 2011-05-27 | 2012-11-28 | 练克俭 | Hollow bone grafting type dynamic hip screw |
| CN102824208A (en) * | 2011-06-16 | 2012-12-19 | 王坤正 | Nickel-titanium shape memory alloy umbrella-titanium mesh femoral head internal supporting device |
| US20140257512A1 (en) * | 2013-03-07 | 2014-09-11 | Lichu Liu | Cementless Hip Resurfacing Prosthesis |
| CN104352270A (en) * | 2014-10-28 | 2015-02-18 | 苏州瑞华医院有限公司 | Bone connecting device for treating femoral neck fracture |
| CN204337023U (en) * | 2014-11-20 | 2015-05-20 | 张弛 | Head marrow nail |
| CN107582218A (en) * | 2017-10-09 | 2018-01-16 | 北京爱康宜诚医疗器材有限公司 | Pattern of fusion femoral stem system |
| CN109171927A (en) * | 2018-10-08 | 2019-01-11 | 大泗医疗生物科技有限公司 | A kind of neck of femur intramedullary nail |
| CN112971951A (en) * | 2021-04-13 | 2021-06-18 | 上海市第六人民医院 | Bone stretching instrument for treating early and medium femoral head necrosis |
-
2022
- 2022-10-09 CN CN202211227345.1A patent/CN115645018B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030065399A1 (en) * | 2001-10-02 | 2003-04-03 | Brannon James Kevin | Biaxial core compression |
| US20070173838A1 (en) * | 2006-01-12 | 2007-07-26 | Kung-Chia Li | Femoral head and neck strengthening device |
| CN201040014Y (en) * | 2007-04-26 | 2008-03-26 | 高俊 | Double-nail locking nail-plate device for treating femur neck fracture |
| CN102793579A (en) * | 2011-05-27 | 2012-11-28 | 练克俭 | Hollow bone grafting type dynamic hip screw |
| CN102824208A (en) * | 2011-06-16 | 2012-12-19 | 王坤正 | Nickel-titanium shape memory alloy umbrella-titanium mesh femoral head internal supporting device |
| US20140257512A1 (en) * | 2013-03-07 | 2014-09-11 | Lichu Liu | Cementless Hip Resurfacing Prosthesis |
| CN104352270A (en) * | 2014-10-28 | 2015-02-18 | 苏州瑞华医院有限公司 | Bone connecting device for treating femoral neck fracture |
| CN204337023U (en) * | 2014-11-20 | 2015-05-20 | 张弛 | Head marrow nail |
| CN107582218A (en) * | 2017-10-09 | 2018-01-16 | 北京爱康宜诚医疗器材有限公司 | Pattern of fusion femoral stem system |
| CN109171927A (en) * | 2018-10-08 | 2019-01-11 | 大泗医疗生物科技有限公司 | A kind of neck of femur intramedullary nail |
| CN112971951A (en) * | 2021-04-13 | 2021-06-18 | 上海市第六人民医院 | Bone stretching instrument for treating early and medium femoral head necrosis |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115645018B (en) | 2024-04-16 |
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