CN212066840U - Combined pressurizing intramedullary nail set and proximal femur end provided with same - Google Patents
Combined pressurizing intramedullary nail set and proximal femur end provided with same Download PDFInfo
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- CN212066840U CN212066840U CN202020395067.0U CN202020395067U CN212066840U CN 212066840 U CN212066840 U CN 212066840U CN 202020395067 U CN202020395067 U CN 202020395067U CN 212066840 U CN212066840 U CN 212066840U
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- screw
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- pressurizing
- thread section
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- 210000000689 upper leg Anatomy 0.000 title claims description 16
- 238000010079 rubber tapping Methods 0.000 claims abstract description 15
- 210000000527 greater trochanter Anatomy 0.000 claims abstract description 5
- 238000007906 compression Methods 0.000 claims description 44
- 230000006835 compression Effects 0.000 claims description 42
- 241001079814 Symphyotrichum pilosum Species 0.000 claims description 6
- 235000004224 Typha angustifolia Nutrition 0.000 claims description 6
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 4
- 210000001694 thigh bone Anatomy 0.000 abstract description 13
- 230000035876 healing Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 3
- 230000000399 orthopedic effect Effects 0.000 abstract description 3
- 210000000988 bone and bone Anatomy 0.000 description 12
- 206010017076 Fracture Diseases 0.000 description 9
- 208000010392 Bone Fractures Diseases 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 208000032843 Hemorrhage Diseases 0.000 description 1
- 206010020100 Hip fracture Diseases 0.000 description 1
- 208000002847 Surgical Wound Diseases 0.000 description 1
- 241000469816 Varus Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 208000034158 bleeding Diseases 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 210000000501 femur body Anatomy 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
Abstract
The utility model relates to an orthopedics is built-in to be prepared technical field, the thighbone near-end of a combination pressurization intramedullary nail group and this nail group of installation is disclosed, its main lock nail pole, forcing screw and bracing piece, the bracing piece passes the rotor nest and installs in the thighbone, main lock nail pole is followed its head to the end by first polished rod section in proper order, the pressurization screw thread section, second polished rod section and self-tapping screw thread section are constituteed, main lock nail pole passes the greater trochanter simultaneously and twists on the thighbone with the bracing piece, forcing screw passes the greater trochanter simultaneously and the bracing piece interlock is in the pressurization screw thread section, forcing screw is located the below of main lock nail pole, self-tapping screw passes the bracing piece and twists on the thighbone. The utility model has the advantages that: the two fractured thighbones are fixed together through the main locking screw rod, the pressurizing screw with the head abutting against the thighbones is meshed with the pressurizing thread section, the pressurizing screw is continuously screwed, and at the moment, the main locking screw rod moves towards the head of the pressurizing screw, so that the thighbones at two ends of the fracture are drawn close to each other, and the healing of the fracture is promoted.
Description
Technical Field
The utility model relates to the technical field of preparation of orthopedic implant, in particular to a proximal femur of a joint-pressurizing intramedullary nail set.
Background
Femoral intertrochanteric fracture is a common orthopedic disease, 90% of the fracture is caused by falling, the population total incidence rates of 63/10 ten thousand women and 34/10 ten thousand men occur in Asia, and the incidence rates of 30% of the fracture in Asia and the fracture in Asia are increased year by year along with the increase of the average life span and the aging of the fracture in China. At present, the conventional operation treatment is adopted, and the operation treatment has the advantages of promoting early movement, facilitating rehabilitation, preventing bed-ridden complications, reducing mortality and the like, and the operation fixing mode is as follows: steel plate fixation (extramedullary mode), intramedullary nail fixation (intramedullary mode).
Steel plate fixation (extramedullary) mainly uses DHS (hip dynamic compression screw) which reduces the load borne by internal fixation by sliding compression to the maximum extent of contact of the fracture surface, but has the following disadvantages: is only suitable for stabilizing fracture, has larger surgical incision and increases the risk of bleeding and infection; eccentricity is fixed, stability is poor, risks such as nail breaking, plate breaking and femoral head cutting are easy to occur, and hip varus is easy to occur.
Intramedullary nail fixation (intramedullary mode) belongs to central fixation, has good mechanical property and is suitable for all types of fractures, Chinese patent CN207640478U describes a femoral trochanter fracture intramedullary nail fixation device which comprises an intramedullary main nail, a near-end bone nail, a helical knife bone nail and a locking nail, wherein the near-end of the intramedullary main nail is provided with a first mounting through hole and a second mounting through hole, the far-end of the intramedullary main nail is provided with a third mounting through hole, the second mounting through hole is positioned at one side of the first mounting through hole close to the far-end of the main nail, the rear part of the locking nail is arranged in the third mounting through hole, the rear part of the helical knife bone nail is arranged in the second mounting through hole, the rear part of the near-end bone nail is arranged in the first mounting through hole, the front end of the near-end bone nail is lapped on the helical knife bone nail, and the distance between the front end of the helical knife bone nail and the lapping position is 1 mm-10 mm, however, the proximal bone nail and the screw blade bone nail only fix the thighbone together, but do not apply pressure on the fractured thighbone to enable the fractured part to be tightly attached, and the healing promotion effect on the thighbone is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a proximal femur end of a joint pressurizing intramedullary nail group for installation, which solves the problem that the existing intramedullary nail does not apply pressure to the fracture.
The purpose of the utility model is realized through the following technical scheme: a combined pressurized intramedullary nail set comprises a main nail locking rod and a pressurized screw, wherein the main nail locking rod sequentially comprises a first polished rod section, a pressurized screw thread section, a second polished rod section and a self-tapping screw thread section from the head part to the tail end of the main nail locking rod, threads on each ring of the pressurized screw thread section are half rings and are positioned on the same side of the axial lead of the main nail locking rod, and the pressurized screw thread section is meshed with the screw thread section of the pressurized screw.
Preferably, the head of the main lock pin rod is provided with a straight groove, the indicating groove is positioned on the notch of the straight groove, and the indicating groove and the pressurizing thread section are both positioned on the same side of the straight groove.
The proximal femur end for installing the combined compression intramedullary nail set comprises the combined compression intramedullary nail set, wherein the main lock nail rod is screwed on the head of the femur through the greater trochanter, and the compression screw is meshed on the compression screw thread section through the greater trochanter.
Preferably, the support rod passes through the rotor socket and is installed in the femoral head, the main locking nail rod simultaneously passes through the greater rotor and is screwed on the femoral head together with the support rod, the compression screw simultaneously passes through the greater rotor and is meshed with the support rod on the compression screw thread section, the self-tapping screw passes through the support rod and is screwed on the femoral head, and the compression screw is positioned below the main locking nail rod.
Preferably, the support rod is provided with an oblong through hole, and the self-tapping screw penetrates through the oblong through hole and is screwed on the femoral body.
Preferably, the included angle a between the main locking nail rod and the axial lead of the femoral shaft is 100-110 degrees.
Preferably, the main lock pin rod and the compression screw are both made of titanium alloy.
The utility model has the advantages of it is following:
1. the broken two sections of thighbones are fixed together through the main lock pin rod, then the compression screw is screwed in, the compression screw with the head abutting against the thighbones is meshed with the compression thread section, the compression screw is continuously screwed, and at the moment, the main lock pin rod moves towards the head of the compression screw so as to draw the broken two ends of the thighbones close to each other and promote the healing of the broken part.
2. Each circle of threads on the pressurizing thread section are half circles of threads positioned on the same side of the axis of the pressurizing thread section, so that the strength of the main lock rod is improved, and the pressure bearing capacity of the main lock rod is improved.
Drawings
FIG. 1 is a schematic structural view of a combination compression intramedullary nail set;
FIG. 2 is a first schematic view of the installation structure of the combined compression intramedullary nail set;
FIG. 3 is a schematic view of a second mounting structure of the combined compression intramedullary nail set;
FIG. 4 is a third schematic view of the mounting structure of the combined compression intramedullary nail set;
in the figure, 1-compression screw, 2-first polished rod section, 3-compression threaded section, 4-second polished rod section, 5-self-tapping threaded section, 6-straight groove, 7-support rod, 8-rotor pit, 9-femoral shaft, 10-greater rotor, 11-femoral head, 12-oblong through hole, 13-indicator groove and 14-self-tapping screw.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.
Example 1:
as shown in fig. 1-4, a proximal femur end for mounting a combined compression intramedullary nail set comprises a main screw locking rod and a compression screw 1, wherein the main screw locking rod is sequentially composed of a first polished rod section 2, a compression screw thread section 3, a second polished rod section 4 and a self-tapping screw thread section 5 from the head to the tail end of the main screw locking rod, the screw thread on each circle of the compression screw thread section 3 is a half circle and is positioned on the same side of the axial lead of the main screw locking rod, the main screw locking rod passes through a greater rotor 10 and is screwed on a femoral head 11, the compression screw 1 passes through the greater rotor 10 and is occluded on the compression screw thread section 3, and the compression screw 1 is positioned below the main screw locking rod. It is worth mentioning that: after the main screw locking rod connects the two fractured bones, the first polished rod section 2 is clamped on the side wall of the greater rotor 10, then the compression screw 1 is screwed in, when the compression screw 1 is meshed with the compression thread section 3, the head of the compression screw 1 is abutted against the side wall of the greater rotor 10, and when the compression screw 1 is continuously screwed, the main screw locking rod moves towards the head of the compression screw 1, so that the two fractured bones are tensioned, the cracks of the bones are tightly jointed, and the healing of the fractured parts is promoted.
In this embodiment, as shown in fig. 1 to 4, a straight groove 6 is formed at the head of the main lock pin rod, the indication groove 13 is located at the notch of the straight groove 6, the indication groove 13 and the pressure screw thread section 3 are both located at the same side of the straight groove 6, and after the pressure screw thread section 3 is screwed into the large rotor 10, the orientation of the pressure screw is determined by the indication groove 13, so that the pressure screw 1 can be screwed into the large rotor to be engaged with the large rotor.
In the embodiment, as shown in fig. 1 to 4, an included angle a between the main locking screw rod and the axial lead of the femoral shaft 9 is 100 to 110 degrees, which is in accordance with ergonomics and is more beneficial for the main locking screw rod to bear gravity.
In this embodiment, as shown in fig. 1-4, the main shank and the compression screw 1 are made of titanium alloy.
Example 2:
as shown in fig. 1-4, a proximal femur end for mounting a combined compression intramedullary nail set comprises a main screw locking rod, a compression screw 1 and a support rod 7, wherein the support rod 7 passes through a rotor socket 8 and is mounted in a femur body 9, the main screw locking rod sequentially comprises a first polished rod section 2, a compression thread section 3, a second polished rod section 4 and a self-tapping thread section 5 from the head to the tail end of the main screw locking rod, the thread on each ring of the compression thread section 3 is a half ring, the main locking screw rod penetrates through the greater rotor 10 and the supporting rod 7 and is screwed on the femoral head 11, the pressurizing screw 1 penetrates through the greater rotor 10 and the supporting rod 7 and is meshed with the pressurizing thread section 3, the pressurizing screw 1 is located below the main locking screw rod, the included angle a between the main locking screw rod and the axial lead of the femoral shaft 9 is 100-110 degrees, and the self-tapping screw 14 penetrates through the supporting rod 7 and is screwed on the femoral shaft 9. It is worth mentioning that: the supporting rod 7 and the intramedullary nail group are Y-shaped to support the broken proximal end of the femur, so that the intramedullary nail group accords with human engineering, has better connection effect and is more beneficial to the healing of the broken femur.
In this embodiment, as shown in fig. 1 to 4, a straight groove 6 is formed at the head of the main lock pin rod, the indication groove 13 is located at the notch of the straight groove 6, the indication groove 13 and the pressure screw thread section 3 are both located at the same side of the straight groove 6, and after the pressure screw thread section 3 is screwed into the large rotor 10, the orientation of the pressure screw is determined by the indication groove 13, so that the pressure screw 1 can be screwed into the large rotor to be engaged with the large rotor.
In this embodiment, as shown in fig. 1 to 4, the support rod 7 is provided with an oblong through hole 11, the tapping screw 14 is screwed on the femoral component 9 through the oblong through hole 11, and the tapping screw 14 is screwed in the middle of the oblong through hole 11 to form dynamic fixation, so that the support rod 7 can move up and down and is suitable for the femur in the growth and development stage.
In this embodiment, as shown in fig. 1-4, the main shank and the compression screw 1 are made of titanium alloy.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (7)
1. A combination compression intramedullary nail set, comprising: the main screw locking rod is composed of a first polished rod section, a pressurizing thread section, a second polished rod section and a self-tapping thread section from the head to the tail end of the main screw locking rod in sequence, threads on each ring of the pressurizing thread section are half rings and are located on the same side of the axis line of the main screw locking rod, and the pressurizing thread section is meshed with the thread section of the pressurizing screw.
2. The set of jointly pressurized intramedullary nails of claim 1, wherein: the head of the main lock nail rod is provided with a straight groove, the indicating groove is positioned on the notch of the straight groove, and the indicating groove and the pressurizing thread section are both positioned on the same side of the straight groove.
3. A proximal femur for mounting a combination of pressurized intramedullary nail sets, comprising: comprising the set of joint compression intramedullary nails of claim 1 or 2, the primary locking shank being screwed onto the femoral head through the greater trochanter through which the compression screw engages on the compression screw thread section.
4. The proximal femur of claim 3, wherein: the supporting rod penetrates through the rotor socket and is installed in a femoral body, the main locking screw rod penetrates through the greater rotor and is screwed on the femoral head, the pressurizing screw penetrates through the greater rotor and is meshed with the supporting rod on the pressurizing thread section, the self-tapping screw penetrates through the supporting rod and is screwed on the femoral body, and the pressurizing screw is located below the main locking screw rod.
5. The proximal femur of claim 4, wherein: the support rod is provided with an oblong through hole, and the self-tapping screw penetrates through the oblong through hole and is screwed on the femoral body.
6. The proximal femur of claim 5, wherein: the included angle a between the main locking nail rod and the axial lead of the femoral shaft is 100-110 degrees.
7. The proximal femur of claim 6, wherein: the main lock bolt rod and the pressurizing screw are made of titanium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020395067.0U CN212066840U (en) | 2020-03-25 | 2020-03-25 | Combined pressurizing intramedullary nail set and proximal femur end provided with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020395067.0U CN212066840U (en) | 2020-03-25 | 2020-03-25 | Combined pressurizing intramedullary nail set and proximal femur end provided with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212066840U true CN212066840U (en) | 2020-12-04 |
Family
ID=73561651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020395067.0U Expired - Fee Related CN212066840U (en) | 2020-03-25 | 2020-03-25 | Combined pressurizing intramedullary nail set and proximal femur end provided with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212066840U (en) |
-
2020
- 2020-03-25 CN CN202020395067.0U patent/CN212066840U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201204 |