CN220404098U - Femoral neck sliding locking system - Google Patents
Femoral neck sliding locking system Download PDFInfo
- Publication number
- CN220404098U CN220404098U CN202321526190.1U CN202321526190U CN220404098U CN 220404098 U CN220404098 U CN 220404098U CN 202321526190 U CN202321526190 U CN 202321526190U CN 220404098 U CN220404098 U CN 220404098U
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- CN
- China
- Prior art keywords
- sliding
- locking
- hollow support
- nail
- support sliding
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- 210000002436 femur neck Anatomy 0.000 title claims abstract description 27
- 241001272720 Medialuna californiensis Species 0.000 claims abstract description 32
- 238000005452 bending Methods 0.000 claims description 8
- 241000587161 Gomphocarpus Species 0.000 claims description 5
- 230000035876 healing Effects 0.000 abstract description 15
- 210000000988 bone and bone Anatomy 0.000 abstract description 13
- 230000009467 reduction Effects 0.000 abstract description 6
- 208000020089 femoral neck fracture Diseases 0.000 abstract description 5
- 208000010392 Bone Fractures Diseases 0.000 description 24
- 206010017076 Fracture Diseases 0.000 description 24
- 238000004904 shortening Methods 0.000 description 5
- 238000002513 implantation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000017074 necrotic cell death Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Abstract
The utility model relates to the technical field of medical appliances, in particular to a femoral neck sliding locking system. The system comprises a locking structure, a hollow support sliding nail, a half moon support locking screw and a conical head locking screw, wherein the hollow support sliding nail is arranged in a guide hole in an axial sliding manner, an axial sliding guide limiting assembly is arranged between the guide hole and the hollow support sliding nail, an inner guide hole is axially arranged in the hollow support sliding nail, an opening groove is obliquely formed in the side face of the hollow support sliding nail, an inner thread is arranged at the tail end of the opening groove, one end, far away from a guide cylinder, of the hollow support sliding nail is integrally of a smooth structure, and an arc-shaped groove is formed in the side face of the hollow support sliding nail. The utility model effectively reduces the damage of the sharp thread facing the spongy bone of the femoral head in the healing process, prevents the loose and falling-off of the fixing nail, improves the stability of the device when the femoral neck fracture is reset, reduces the risk of femoral neck reduction failure, and is convenient for patients to recover faster.
Description
Technical Field
The utility model relates to the technical field of medical appliances, in particular to a femoral neck sliding locking system.
Background
Femoral neck fracture is a clinically common fracture type, and complications after internal fixation of femoral neck fracture mainly comprise femoral head necrosis and bone nonunion, and the occurrence rate is still high in young and young people at present. For this reason, it is necessary to improve the accuracy of reduction of fracture of the femoral neck and the stability of internal fixation, and the internal fixation device should be capable of maintaining good contact of the fracture ends, maintaining firm stability and resisting daily stress, thereby ensuring healing of the fracture. The common operation method for clinically treating the femur neck fracture mainly comprises the following steps: hollow nail fixation, nail plate systems, bone flap implants, joint replacements, and the like.
The Chinese patent publication No. CN215839413U proposes a supporting and fixing system for femur neck fracture, and the axis of the power rod and the axis of the anti-rotation screw are crossed to form different surfaces, so that certain bending resistance and anti-rotation capability are provided for fracture surfaces. However, in the dynamic pressurization process, the screw thread at the front end of the power rod and the anti-rotation screw is easy to cause spongy bone loosening of fracture surfaces under the action of shearing stress, so that the stability of the two fixing nails in the femoral head is affected, and the risk of complications in the subsequent healing of patients is increased.
Disclosure of Invention
The utility model aims to provide a femoral neck sliding locking system, which overcomes the defects in the prior art, effectively reduces the damage of sharp threads to cancellous bones of a femoral head in the healing process, prevents loose and falling of a fixing nail, improves the stability of the device during reduction of femoral neck fracture, reduces the risk of femoral neck reduction failure, and is convenient for patients to recover faster.
The technical scheme adopted for solving the technical problems is as follows:
a femoral neck sliding locking system comprising a locking structure, a hollow support slide pin, a half-moon support locking screw, and a cone head locking screw, wherein:
the locking structure comprises a locking plate and a guide cylinder obliquely arranged at one axial end of the locking plate, a locking hole is formed in the locking plate, a guide hole is formed in the guide cylinder along the axial direction, and a movable groove is formed in the guide cylinder at the same side of the fracture end in the bending stress direction;
the hollow support sliding nails are arranged in the guide holes in an axial sliding manner, an axial sliding guide limiting assembly is arranged between the guide holes and the hollow support sliding nails, and the axial sliding guide limiting assembly has the functions of firstly ensuring that the hollow support sliding nails move in the axial direction and cannot be misplaced in the axial direction and secondly limiting the maximum implantation depth of the hollow support sliding screws; the hollow support sliding nail is axially provided with an inner guide hole matched with the Kirschner wire, the side surface of the hollow support sliding nail is obliquely provided with an open slot for connecting a half-moon support locking screw, the tail end of the open slot is provided with an inner thread, one end of the hollow support sliding nail far away from the guide cylinder is integrally in a smooth structure, and the side surface of the hollow support sliding nail is provided with an arc-shaped slot, so that the end structure of the hollow support sliding nail is similar to a blade structure but has a smooth outer surface, and compared with the thread structure of a common fixing nail, the structure is arranged in a mode that the damage of the thread of the fixing nail to cancellous bone in the dynamic pressurization process can be avoided, and the bending resistance of the device is improved; when the system is implanted, the relative positions of the locking plate and the hollow support sliding nails are assisted and fixed by using an external instrument, so that the hollow support sliding nails are positioned at the limit positions of the sliding grooves, and the hollow support sliding bolts and the locking plate are ensured to be stable and free from loosening after the device is implanted into the femoral head;
the nail head of the half-moon support locking screw is provided with a half-moon thread, the nail tail is provided with an external thread, the half-moon support locking screw is positioned in an opening groove of the hollow support sliding nail, the half-moon thread extends out of the opening groove, the external thread is connected in the internal thread, and the hollow support sliding nail moves in the movable groove; after the half-moon supporting locking screw is implanted into a human body along the axial direction of the open slot, the half-tooth thread of the nail head is contacted with the bone surface, the external thread of the tail is engaged and locked with the internal thread, and the thread engagement at the two ends of the conical head locking screw can play a role in preventing the nail from withdrawing.
The conical head locking screw is installed through the locking hole;
in the scheme, the hollow support sliding screw and the half-moon support locking screw are arranged in a crossing way, so that good anti-rotation and bending resistance performance is provided for the system; the two cross nails can slide backwards along the axis direction of the femur neck, so that a movement space is provided for shortening in the fracture surface recovery process, and the fracture surface is more convenient to heal; the sliding grooves in the hollow support sliding screw enable the two crossed nails to slide backwards along the axis direction of the femur neck, so that a movement space is provided for shortening in the healing process of the fracture surface, and the healing of the fracture surface is facilitated; in addition, the front end of the hollow support sliding screw adopts a smooth blade type structural design formed by adding an arc slot on the smooth outer surface to replace a threaded structure, so that the damage of sharp threads to the spongy bone of the femoral head in the healing process can be effectively reduced, and the loosening and falling of the nail body are prevented.
Further, the locking hole is a locking hole of the conical head.
Further, a gripping groove for being matched with an external auxiliary imbedding device is formed in one side of the locking plate of the locking structure.
Further, the axial sliding guide limiting assembly comprises a boss and a sliding groove, wherein the boss is arranged on the inner wall of a guide hole of the guide cylinder, and the sliding part is arranged on the outer wall of the hollow support sliding nail.
Further, an included angle of 6-8 degrees is formed between the hollow support sliding screw and the half-moon support locking screw; the two are in a cross nail structure, and the cross structure ensures that the half-moon support locking screw can firmly fix bones and two nails, thereby preventing accidents such as nail removal, nail withdrawal and the like; meanwhile, the different surfaces of the cross nails can play a role in preventing rotation and dislocation of fracture surfaces in the healing process.
Further, one end of the half-moon support locking screw provided with external threads is also provided with a driving groove used for being matched with an auxiliary instrument; facilitating implantation of the locking screw during surgery.
The beneficial effects of the utility model are as follows: compared with the prior art, the femoral neck sliding locking system has the following advantages: the device is suitable for internal fixation of femoral neck fracture, and the crossed different surfaces of the hollow support sliding nail and the half-moon support locking screw can provide stable bending resistance and anti-rotation capacity for fracture surfaces; the sliding grooves in the hollow support sliding screw enable the two crossed nails to slide backwards along the axis direction of the femur neck, so that a movement space is provided for shortening in the healing process of the fracture surface, and the healing of the fracture surface is facilitated; in addition, the front end of the hollow support sliding screw adopts a smooth blade type structural design formed by adding an arc slot on the smooth outer surface to replace a threaded structure, so that the damage of sharp threads to the spongy bone of the femoral head in the healing process can be effectively reduced, the loose falling of the nail body is prevented, the stability of the device in the reduction of the fracture of the femoral neck is improved, the risk of reduction failure of the femoral neck is reduced, and the femoral neck is convenient for a patient to recover faster.
Drawings
FIG. 1 is a schematic view of the structure of the present utility model in an installed state;
FIG. 2 is a schematic top view of the present utility model;
FIG. 3 is a schematic side view of the present utility model;
FIG. 4 is a schematic view of the structure of the hollow support slide pin and the half-moon support locking screw of the present utility model as they move from one state to another;
FIG. 5 is a schematic top view of the locking structure of the present utility model;
FIG. 6 is a schematic cross-sectional view of a locking structure of the present utility model;
FIG. 7 is a schematic perspective view of a locking structure of the present utility model;
FIG. 8 is a schematic perspective view of a hollow support slide staple of the present utility model;
FIG. 9 is a schematic side view of an arcuate slotted end of a hollow support slide staple of the present utility model;
FIG. 10 is a schematic view of the bottom view of the hollow support slide staple of the present utility model;
FIG. 11 is a cross-sectional view of the hollow support slide of the present utility model;
FIG. 12 is a schematic view of the structure of the half-moon supporting locking screw of the present utility model;
fig. 13 is a schematic view showing a driving groove structure of the half moon supporting locking screw of the present utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.
In the embodiment shown in fig. 1-13, a femoral neck sliding locking system comprises a locking structure 1, a hollow support slide pin 2, a half-moon support locking screw 3 and a cone head locking screw 4, wherein:
the locking structure 1 comprises a locking plate and a guide cylinder obliquely arranged at one axial end of the locking plate, wherein a locking hole 12 is formed in the locking plate, a guide hole 11 is formed in the guide cylinder along the axial direction, and a movable groove 14 is formed in the guide cylinder at the same side of the bending stress direction of the fracture end;
the hollow support sliding nails 2 are arranged in the guide holes 11 in an axial sliding manner, an axial sliding guide limiting component is arranged between the guide holes 11 and the hollow support sliding nails 2, and the axial sliding guide limiting component has the functions of firstly ensuring that the hollow support sliding nails 2 move in the axial direction and cannot be misplaced in the axial direction and secondly limiting the maximum implantation depth of the hollow support sliding nails; the hollow support sliding nail 2 is provided with an inner guide hole 22 matched with the Kirschner wire along the axial direction, the side surface of the hollow support sliding nail is obliquely provided with an open slot 23 for connecting the half moon support locking screw 3, the tail end of the open slot 23 is provided with an inner thread 21, one end of the hollow support sliding nail 2 far away from the guide cylinder is integrally in a smooth structure, and the side surface of the hollow support sliding nail 2 is provided with an arc-shaped slot 24, so that the end structure of the hollow support sliding nail 2 is similar to a blade structure but has a smooth outer surface; when the system is implanted, the relative positions of the locking plate and the hollow support sliding nails 2 are assisted and fixed by using an external instrument, so that the hollow support sliding nails 2 are positioned at the limit positions of the sliding grooves, and the hollow support sliding nails and the locking plate are ensured to be stable and free from loosening after the device is implanted into the femoral head;
the nail head of the half-moon supporting locking screw 3 is provided with a half-moon thread 32, the nail tail is provided with an external thread 31, the half-moon supporting locking screw 3 is positioned in the open groove 23 of the hollow supporting sliding nail 2, the half-moon thread 32 extends out of the open groove 23, the external thread 31 is connected in the internal thread 21, and the hollow supporting sliding nail 2 moves in the movable groove 14; after the half-moon supporting locking screw is implanted into a human body along the axial direction of the open groove 23, the half-tooth thread of the nail head is contacted with the bone surface, the external thread 31 at the tail part is meshed and locked with the internal thread 21, and the thread meshing at the two ends of the conical head locking screw 4 can play a good role in preventing nail withdrawing.
The conical head locking screw 4 is installed through the locking hole 12;
in the embodiment, the hollow support sliding nails and the half-moon support locking screws are arranged in a crossing way, so that good anti-rotation and bending resistance performance is provided for the system; the two cross nails can slide backwards along the axis direction of the femur neck, so that a movement space is provided for shortening in the fracture surface recovery process, and the fracture surface is more convenient to heal; the sliding grooves in the hollow support sliding nails enable the two crossed nails to slide backwards along the axis direction of the femoral neck, so that a movement space is provided for shortening in the healing process of fracture surfaces, and healing of fracture surfaces is facilitated; in addition, the front end of the hollow support sliding nail adopts a smooth blade type structural design formed by adding an arc-shaped slot 24 on the smooth outer surface to replace a threaded structure, so that the damage of sharp threads to the spongy bone of the femoral head in the healing process can be effectively reduced, and the nail body is prevented from loosening and falling off.
In this embodiment, the locking hole 12 is a conical locking hole 12.
In this embodiment, a gripping groove 15 for matching with an external auxiliary implanter is provided on one side of the locking plate of the locking structure 1.
In this embodiment, the axial sliding guiding limiting component includes a boss 13 and a sliding groove 25, the boss 13 is disposed on the inner wall of the guiding hole 11 of the guiding cylinder, and the sliding groove 25 is disposed on the outer wall of the hollow supporting sliding nail 2.
In the embodiment, an included angle of 6-8 degrees is formed between the hollow support sliding nail 2 and the half-moon support locking screw 3; the two are in a cross nail structure, and the cross structure ensures that the half-moon support locking screw can firmly fix bones and two nails, thereby preventing accidents such as nail removal, nail withdrawal and the like; meanwhile, the different surfaces of the cross nails can play a role in preventing rotation and dislocation of fracture surfaces in the healing process.
In this embodiment, the end of the half-moon supporting locking screw provided with the external thread 31 is further provided with a driving groove 33 for matching with an auxiliary instrument; facilitating implantation of the locking screw during surgery.
The foregoing embodiments are merely examples of the present utility model, and the scope of the present utility model includes, but is not limited to, the forms and styles of the foregoing embodiments, and any suitable changes or modifications made by those skilled in the art, which are consistent with the claims of the present utility model, shall fall within the scope of the present utility model.
Claims (6)
1. A femoral neck sliding locking system, characterized by: including locking structure, cavity support slide nail, half month support locking screw and conical head locking screw, wherein:
the locking structure comprises a locking plate and a guide cylinder obliquely arranged at one axial end of the locking plate, a locking hole is formed in the locking plate, a guide hole is formed in the guide cylinder along the axial direction, and a movable groove is formed in the guide cylinder at the same side of the fracture end in the bending stress direction;
the hollow support sliding nails are arranged in the guide holes in an axial sliding manner, an axial sliding guide limiting assembly is arranged between the guide holes and the hollow support sliding nails, inner guide holes are formed in the hollow support sliding nails in the axial direction, open grooves are obliquely formed in the side surfaces of the hollow support sliding nails, internal threads are arranged at the tail ends of the open grooves, one ends, far away from the guide cylinders, of the hollow support sliding nails are integrally of a smooth structure, and arc-shaped grooves are formed in the side surfaces of the hollow support sliding nails;
the nail head of the half-moon support locking screw is provided with a half-moon thread, the nail tail is provided with an external thread, the half-moon support locking screw is positioned in an opening groove of the hollow support sliding nail, the half-moon thread extends out of the opening groove, the external thread is connected in the internal thread, and the hollow support sliding nail moves in the movable groove;
the cone head locking screw is mounted through the locking hole.
2. A femoral neck sliding locking system according to claim 1, wherein: the locking hole is a locking hole of the conical head.
3. A femoral neck sliding locking system according to claim 1, wherein: one side of the locking plate of the locking structure is provided with a gripping groove for being matched with an external auxiliary imbedding device.
4. A femoral neck sliding locking system according to claim 1, wherein: the axial sliding guide limiting assembly comprises a boss and a sliding groove, the boss is arranged on the inner wall of a guide hole of the guide cylinder, and the sliding groove is arranged on the outer wall of the hollow support sliding nail.
5. A femoral neck sliding locking system according to claim 1, wherein: the hollow support sliding nail and the half-moon support locking screw form an included angle of 6-8 degrees.
6. A femoral neck sliding locking system according to claim 1, wherein: the one end that is provided with the external screw thread of half month support locking screw still is provided with the drive groove that is used for with auxiliary instrument complex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321526190.1U CN220404098U (en) | 2023-06-15 | 2023-06-15 | Femoral neck sliding locking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321526190.1U CN220404098U (en) | 2023-06-15 | 2023-06-15 | Femoral neck sliding locking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220404098U true CN220404098U (en) | 2024-01-30 |
Family
ID=89644502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321526190.1U Active CN220404098U (en) | 2023-06-15 | 2023-06-15 | Femoral neck sliding locking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220404098U (en) |
-
2023
- 2023-06-15 CN CN202321526190.1U patent/CN220404098U/en active Active
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