CN112472265A - Intramedullary implant system - Google Patents
Intramedullary implant system Download PDFInfo
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- CN112472265A CN112472265A CN202011192803.3A CN202011192803A CN112472265A CN 112472265 A CN112472265 A CN 112472265A CN 202011192803 A CN202011192803 A CN 202011192803A CN 112472265 A CN112472265 A CN 112472265A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/74—Devices for the head or neck or trochanter of the femur
- A61B17/742—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck
- A61B17/744—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck the longitudinal elements coupled to an intramedullary nail
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7283—Intramedullary pins, nails or other devices with special cross-section of the nail
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses an intramedullary implanting system, which comprises a main nail, a lag screw, an anti-rotation nail and a pressurizing locking nail; the near end of the main nail is provided with a gourd-shaped anti-rotation hole; the lag screw penetrates through the first through hole, the front end of the lag screw is connected with the femoral head, the rear end of the lag screw is in threaded connection with the pressurizing locking nail, and the side wall of the lag screw is provided with a notch which extends axially and is communicated with the inner cavity of the lag screw; the anti-rotation nail penetrates through the second through hole and is in surface contact with the groove opening, the rear end of the anti-rotation nail is provided with a step for limiting the forward moving freedom degree of the anti-rotation nail, a boss is arranged on the contact surface, when the step is in contact with the side wall of the main nail, the boss limits the forward moving freedom degree of the pressurizing locking nail, the pressurizing locking nail continues to rotate under the limitation of the boss, the tension screw can be forced to move backwards, and pressure is applied to the fracture line. The intramedullary implant system provided by the invention can stably resist torsional stress and axial load, effectively prevent the rotation of the femoral head, pressurize the fracture part and dynamically promote the healing of hip fracture.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an intramedullary implanting system.
Background
The hip (groin area) is the area where the trunk connects with the legs, which makes the trunk and legs move forward, backward and sideways. Since the hip is the center of a series of physical movements, it is prone to potential strain and fracture. The intramedullary nail belongs to an orthopedic internal fixation instrument in medical instruments, is a preferred internal fixation instrument for hip fracture (such as femoral head and neck fracture), can control the axial force line of a fracture part, can prevent fracture rotation deformity by the interlocking intramedullary nail, and further reduces the risk of fracture of an implant. However, in most of the existing intramedullary nails, due to design defects, the fracture end is often rotated and separated and displaced during and after the operation, the broken end is unstable, the lag screw is cut out from the femoral head, and the like, and the problems are often solved by re-operation, which increases pain for patients and wastes medical resources.
Disclosure of Invention
The present invention has been made to overcome the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide an intramedullary implant system that can stably resist torsional stress and axial load, effectively prevent rotation of a femoral head, and dynamically promote healing of a hip fracture by applying pressure to the fracture site.
In order to achieve the above purpose, the invention provides the following technical scheme:
an intramedullary implant system comprising:
the far end of the main nail is provided with a cortical bone screw, the near end of the main nail is provided with an anti-rotation hole, and the anti-rotation hole comprises a first through hole and a second through hole which are arranged side by side and are mutually communicated;
the lag screw is of a hollow structure, penetrates through the first through hole, the front end of the lag screw is in threaded connection with the femoral head, the inner part of the rear end of the lag screw is in threaded connection with the pressurizing locking nail, and a notch which extends axially and is communicated with the inner cavity of the lag screw is formed on the side wall of the lag screw;
the anti-rotation nail is parallel to the tension screw and penetrates through the second through hole, and is in surface contact with the notch, and a step is arranged at the rear end of the anti-rotation nail so as to limit the forward moving freedom degree of the anti-rotation nail; the contact surface of the anti-rotation nail is provided with a boss extending into the lag screw, the boss can move back and forth along the notch along with the anti-rotation nail, when the step is in contact with the side wall of the main nail, the boss is used for limiting the forward movement freedom degree of the pressurizing locking nail, and the pressurizing locking nail continues to rotate under the limitation of the boss so as to force the lag screw to move back to apply pressure on the fracture line.
As a practical way, the anti-rotation hole is gourd-shaped.
As a practical matter, the diameter of the first through hole is larger than the diameter of the second through hole.
As an implementable manner, the compression locking nail comprises a compression nail and a locking nail, and the pitch of the compression nail and the locking nail is different.
As an implementation manner, the thread bottom diameter of the pressurizing locking nail is in a frustum shape, an external thread is formed on the vertebral body of the pressurizing locking nail, and the conical top of the pressurizing locking nail is arranged towards the front end of the lag screw.
As an implementation manner, the notch extends from the rear end of the lag screw to the external thread of the lag screw, and two key grooves are respectively formed on two side walls of the notch.
As an implementation manner, the notch includes a front-end notch and a rear-end notch, the key groove is formed on two sides of the front-end notch, and the rear-end notch is communicated with an inner cavity of the lag screw.
As an implementation manner, the front end of the rotation-preventing nail is further provided with a side wing, and the side wing is adapted to the key groove and can slide back and forth along the key groove along with the movement of the rotation-preventing nail.
As an implementable mode, the step end part of the anti-rotation nail, the main nail, the lag screw and the pressure locking nail are all provided with grooves matched with an installation tool.
As an implementable manner, the shape of the groove is a straight line, a cross, an internal angle of a hexagon or a quincunx.
Compared with the prior art, the invention has the following beneficial effects:
the intramedullary implanting system provided by the invention mainly comprises a main nail, a lag screw, an anti-rotation nail and a pressurizing locking nail, when in use, the main nail is implanted into the medullary cavity of the femoral head, then the front end of the lag screw passes through the first through hole and is connected with the femoral head by screw thread, meanwhile, the anti-rotation nail penetrates through the second through hole until the step of the anti-rotation nail contacts the outer wall of the lag screw, and the anti-rotation nail is ensured to be contacted with the notch surface, the lug boss penetrates through the notch to penetrate into the lag screw, then the pressurizing locking nail is screwed in from the rear end of the lag screw with a hollow structure, after the pressurizing lock pin moves forward for a certain distance, the front end of the pressurizing lock pin can be abutted against the lug boss of the anti-rotation pin, the femoral head can not move forwards continuously, the pulling screw can drive the femoral head to move backwards along with the continuous rotation of the pressurizing locking nail and the limitation of the step of the anti-rotation nail arranged at the second through hole on the forward movement of the anti-rotation nail, so that the pressurization of the fracture line is realized.
The anti-rotation nail is inserted so that the rotational freedom degree of the lag screw relative to the first through hole is lost, and the situation that the restoration is lost due to the fact that the femoral head is driven to rotate around the first through hole in the main nail by the threads on the lag screw is avoided; the matching of the notch, the boss and the step enables the pressurizing distance to be adjusted steplessly; after the lag screw, the pressurizing nail and the anti-rotation nail are assembled, the tension screw, the pressurizing nail and the anti-rotation nail can move linearly along the anti-rotation hole in a one-way mode. Because of the limitation of the steps in the anti-rotation nail, the whole body can not move forwards and only can move backwards, thereby effectively preventing the assembly from moving forwards to cut the femoral head, realizing the dynamic requirement and promoting the rapid healing of the fracture.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of an intramedullary fixation device according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of an anti-rotation hole in a main nail according to an embodiment of the present invention;
FIG. 3 is a partial cross-sectional view of an intramedullary fixation device provided in accordance with one embodiment of the present invention;
FIG. 4 is a schematic view of a pressurized locking pin according to an embodiment of the present invention;
FIG. 5 is a partial cross-sectional view of an intramedullary fixation device provided in accordance with another embodiment of the present invention;
FIG. 6 is a schematic view of a pressurized locking pin according to another embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a lag screw according to an embodiment of the present invention;
FIG. 8 is a schematic structural view of a rotation prevention pin according to an embodiment of the present invention;
FIG. 9 is a cross-sectional view A-A of the tension screw of FIG. 3 or FIG. 5;
description of reference numerals:
1. a main nail; 11. anti-rotation holes; 111. a first through hole; 112. a second through hole; 2. a lag screw; 21. a notch; 211. a front section notch; 212. a rear section notch; 22. a keyway; 3. anti-rotation nails; 31. a boss; 32. a step; 33. a side wing; 4. pressing the locking nail; 41. pressing the nail; 411. a stud; 412. a bolt head; 42. locking nails; 5. cortical bone screws; 6. and (4) a groove.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, the present invention provides an intramedullary implantation system, which includes a main nail 1, a lag screw 2 and an anti-rotation nail 3 parallelly penetrating through the proximal end of the main nail 1, and a compression locking nail 4; in the present application, the proximal end refers to an end close to the user, the distal end refers to an end far away from the user, the front end refers to an end close to the femoral head, and the rear end refers to an end far away from the femoral head, wherein, referring to fig. 1, the distal end of the main nail 1 is provided with a cortical bone screw 5, the distal end of the main nail 1 can be fixed on the cortical bone 5 through the cortical bone screw 5, referring to fig. 2, the proximal end of the main nail 1 is provided with a rotation-preventing hole 1, the rotation-preventing hole 1 is gourd-shaped or substantially "8" shaped, and comprises a first through hole 111 and a second through hole 112 which are mutually communicated, the first through hole 111 is adapted to the tension screw 2, and the second through hole 112 is adapted to the rotation-preventing nail 3; referring to fig. 7, the lag screw 2 is a hollow structure penetrating through the first through hole 111, the front end of the lag screw is provided with an external thread for connecting with the femoral head, the rear end of the lag screw is provided with an internal thread for connecting with the compression locking nail 4, and referring to fig. 9, the sidewall of the lag screw 2 is provided with a notch 21 extending axially and communicating with the inner cavity of the lag screw 2; referring to fig. 1 or 3-4, the anti-rotation nail 3 is inserted into the second through hole 12 and contacts with the notch 21, and referring to fig. 3-6, a step 32 is disposed at the rear end of the anti-rotation nail 3 to limit the forward movement freedom of the anti-rotation nail 3; the contact surface of the anti-rotation nail 3 is provided with a boss 31 extending into the tension screw 2, the boss 31 can move back and forth along the notch 21 along with the movement of the anti-rotation nail 3, when the step 32 is contacted with the side wall of the main nail 1, the boss 31 can limit the forward movement freedom degree of the pressurizing locking nail 4, and the pressurizing locking nail 4 continues to rotate under the limit of the boss 31 so as to force the tension screw 2 to move back and apply pressure to the fracture line.
Referring to fig. 1-3 or 5, the design principle of the present application requires proximal locking after implantation of the main nail 1. The lag screw 2 is implanted through the first through hole 111 of the anti-rotation hole 11, and the femoral head is connected with the lag screw 2 through the external thread of the head. The anti-rotation nail 3 is implanted through the second through hole 112 of the anti-rotation hole 11 and is attached to the plane of the lag screw 2. The insertion of the anti-rotation nail 3 enables the rotation freedom degree of the lag screw 2 relative to the first through hole 111 to be lost, and the phenomenon that the external thread on the lag screw 2 drives the femoral head to rotate around the anti-rotation hole 11 on the main nail 1 is avoided, so that the restoration is lost. The anti-rotation nail 3 is inserted until the step 32 thereof contacts with the outer wall of the main nail 1. A compression locking nail 4 is screwed in and is in threaded engagement with the lag screw 2. When the end part of the pressurizing locking nail 4 contacts the boss 31 of the anti-rotation nail 3, the pressurizing locking nail is continuously screwed in, the lag screw 2 is forced to linearly retreat along the axis, and the femoral head also retreats along with the lag screw 2, so that the pressurization of the fracture line is realized, and the stepless regulation of the pressurizing distance can be realized. After the lag screw 2, the pressurizing lock nail 4 and the anti-rotation nail 3 are assembled, the anti-rotation nail can move along the anti-rotation hole 11 of the main nail 1 in a one-way straight line mode. Due to the limitation of the step 32 of the anti-rotation nail 3, the anti-rotation nail cannot move forwards and only can move backwards. Therefore, the lag screw 2 is effectively prevented from moving forwards to cut the femoral head, the dynamic requirement is realized, and the rapid healing of the fracture is promoted.
Referring to fig. 2, considering that the lag screw 2 needs to be provided with a built-in pressure locking nail and the whole stress needs to be larger, the cross-sectional area of the lag screw 2 is designed to be larger than that of the anti-rotation nail 3, and accordingly, the diameter of the first through hole 11 is larger than that of the second through hole 12.
The compression locking pin 4 of the present application may be in two forms, one of which:
referring to fig. 3-4, the compression locking screw 4 includes a compression screw 41 and a locking screw 42, the compression screw 41 and the locking screw 42 have different pitches, and it is adapted that the rear end of the lag screw 2 is provided with two internal threads, which are a first internal thread and a second internal thread in sequence from front to back, the first internal thread is adapted to the compression screw 41, and the second internal thread is adapted to the locking screw 42, and accordingly, the pitches of the first internal thread and the second internal thread are different, the compression screw 41 may be composed of a stud 411 and a bolt head 412 that are integrally formed, the stud 411 is provided with an external thread adapted to the first internal thread, the diameter of the bolt head 412 is larger than that of the stud 411, and the working principle is that the compression screw 41 is screwed into the first internal thread from the rear end of the lag screw 2, and the compression screw 41 continuously moves forward along with the rotation of the compression screw 41 until contacting the boss 31, in this embodiment, the length of the boss 31 is set to extend from the contact surface of the anti-rotation screw 3 to the outer wall of the, that is, the length of the boss 31 is greater than the minimum distance between the contact surface and the bolt head 42, so that when the bolt head 412 of the compression screw 41 is limited, the stud 411 can rotate freely, and the rotation of the compression screw 41 is converted into the backward movement of the lag screw 2. After the position of the pressure nail 41 is set, the locking nail 42 is screwed into the second internal thread, and the screwing of the locking nail 42 can effectively prevent the pressure nail 41 from moving backwards due to the fact that the thread pitches of the first internal thread and the second internal thread are different, so that the locking function is achieved. Referring to fig. 4, in order to make the locking pin 5 lock the assembly composed of the tension screw 2, the anti-rotation pin 3 and the pressing pin 41 together, in the embodiment, not only the thread pitches of the locking pin 42 and the pressing pin 41 are different, but also the diameter of the locking pin 42 is larger than that of the pressing pin 41, so as to ensure that the pressing pin 41 can be smoothly screwed into the first internal thread.
Secondly, referring to fig. 5-6, the pressurized locking nail 4 is frustum-shaped, that is, the diameter of the bottom of the thread of the pressurized locking nail 4 is tapered, and naturally, the diameter of the external thread arranged on the outer wall of the pressurized locking nail 4 is gradually changed.
Referring to fig. 7, in the present embodiment, the length of the notch 21 is set to extend from the rear end of the tension screw 2 to the external thread of the tension screw 2, the notch is divided into a front-section notch 211 and a rear-section notch 212, the length of the rear-section notch 212 is at least not less than the length between the boss 31 and the step 32, at this time, the opening depth of the front-section notch 211 is smaller than the opening depth of the rear-section notch 212, preferably, the front-section notch 211 is not communicated with the inner cavity of the tension screw 2, so as to ensure the strength of the front end of the tension screw, and the rear-section notch 212 is communicated with the inner cavity of the tension screw 2, so that the boss 31 can move back and forth along the notch 21 and can limit the.
Referring to fig. 8, in order to increase the rotation stopping function of the anti-rotation nail 3 and avoid the flare angle between the front end of the anti-rotation nail 3 and the lag screw 2 during subsequent dynamic processes, in the present embodiment, key slots 22 are further formed on two side walls of the notch 21, preferably, a key slot is formed on the front section notch 211, because the front section notch 211 is not communicated with the inner cavity of the lag screw 2, the strength is high, and the general flare angle appears at the front end, meanwhile, a side wing 33 is arranged at the front end of the anti-rotation nail 3, and the side wings 33 are preferably arranged in pairs to ensure the stability of the clamping of the side wing 33 in the key slot 22, so that the front end of the anti-rotation nail 3 is constantly attached to the lag screw 2.
When preventing soon nail 3 inserts second through-hole 12, can follow the rear end of keyway 22 with flank 33 simultaneously, and with spacing boss 31 from the rear end of notch 21 put into and move forward, flank 33 not only can be comparatively smooth enter into keyway 22 from the rear end of front end notch 212, and the rear end of anterior segment notch 211 can also cooperate step 32 to play the effect of spacing support to boss 31 in addition to make the stability that whole device is more. When the anti-rotation nail 3 is inserted into the second through hole 12, the lateral wing 33 is placed into and moves forwards from the rear end of the front section notch 211 and the rear end of the rear section notch 212 of the boss 31, when the step 32 of the anti-rotation nail 3 contacts the side wall of the main nail 1, the boss 31 just abuts against the rear end wall of the front section notch 211, and the lateral wing 33 is correspondingly clamped in the key groove 22. The condition that the front section of the anti-rotation nail 3 is far away from the lag screw 2 can not occur in the process that the anti-rotation nail 3 integrally moves along the notch 21, and the phenomenon of opening mouth can not occur.
Referring to fig. 4-8, for the convenience of installation, the present application further provides a groove 6 at the end of the step 32 of the anti-rotation nail 3 for fitting with an installation tool. The groove 6 is in the shape of a straight line, a cross, an inner angle hexagon or a quincunx. Of course, the arrangement of the groove 6 is not limited to the step 32 of the anti-rotation nail 3, and may be arranged at the proximal end of the main nail 1 or the rear end of the lag screw 2, or the rear end of the compression locking nail 4 (including the rear end of the compression nail 41 or the rear end of the locking nail 42).
Referring to fig. 1, after the lag screw 2, the compression locking pin 4 and the anti-rotation pin 3 are assembled, they can move linearly in one direction along the first through hole 11 and the second through hole 12 of the main pin 1. Because of the limitation of the step 32 in the anti-rotation nail 3, the whole body can not move forwards and only can move backwards, thereby effectively preventing the assembly from moving forwards to cut the femoral head, realizing the dynamic requirement and promoting the rapid healing of the fracture.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. An intramedullary implant system, comprising:
the far end of the main nail is provided with a cortical bone screw, the near end of the main nail is provided with an anti-rotation hole, and the anti-rotation hole comprises a first through hole and a second through hole which are arranged side by side and are mutually communicated;
the lag screw is of a hollow structure, penetrates through the first through hole, the front end of the lag screw is in threaded connection with the femoral head, the inner part of the rear end of the lag screw is in threaded connection with the pressurizing locking nail, and a notch which extends axially and is communicated with the inner cavity of the lag screw is formed in the side wall of the lag screw;
the anti-rotation nail is parallel to the tension screw and penetrates through the second through hole, and is in surface contact with the notch, and a step is arranged at the rear end of the anti-rotation nail so as to limit the forward moving freedom degree of the anti-rotation nail; the contact surface of the anti-rotation nail is provided with a boss extending into the lag screw, the boss can move back and forth along the notch along with the anti-rotation nail, when the step is in contact with the side wall of the main nail, the boss is used for limiting the forward movement freedom degree of the pressurizing locking nail, and the pressurizing locking nail continues to rotate under the limitation of the boss so as to force the lag screw to move back and apply pressure to the fracture line.
2. The intramedullary implant system of claim 1, wherein a diameter of the first through bore is greater than a diameter of the second through bore.
3. The intramedullary implant system of claim 1, wherein the compression lock pin comprises a compression pin and a lock pin, the compression pin having a different pitch than the lock pin.
4. The intramedullary implantation system of claim 1, wherein the bottom diameter of the compression locking screw is tapered, the compression locking screw has an external thread on its vertebral body, and the top of the compression locking screw is disposed toward the front end of the lag screw.
5. The intramedullary implant system of claim 1, wherein the slot extends from the rear end of the lag screw to the external thread of the lag screw, and two key slots are respectively formed on two side walls of the slot.
6. The intramedullary implant system of claim 5, wherein the slot includes a forward slot and a rear slot, the keyway opening on either side of the forward slot, the rear slot communicating with the internal cavity of the lag screw.
7. The intramedullary implant system of claim 5 or 6, wherein the anti-rotation pin further comprises a wing at the front end thereof, the wing being adapted to the keyway and being slidable back and forth along the keyway in response to movement of the anti-rotation pin.
8. The intramedullary implant system of claim 1, wherein the stepped end of the rotation prevention pin, the main pin, the lag screw, and the compression lock pin are each provided with a groove adapted to an installation tool.
9. The intramedullary implant system of claim 8, wherein the groove is in the shape of a straight line, a cross, an internal hexagonal or a quincunx.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011192803.3A CN112472265B (en) | 2020-10-30 | 2020-10-30 | Intramedullary implant system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011192803.3A CN112472265B (en) | 2020-10-30 | 2020-10-30 | Intramedullary implant system |
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| CN112472265A true CN112472265A (en) | 2021-03-12 |
| CN112472265B CN112472265B (en) | 2022-07-12 |
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| CN201445555U (en) * | 2009-07-14 | 2010-05-05 | 常州市康辉医疗器械有限公司 | Thigh bone near-end fracture intramedullary nail fixing device |
| CN201701287U (en) * | 2010-04-23 | 2011-01-12 | 常州奥斯迈医疗器械有限公司 | Intramedullary nail device |
| CN102232863A (en) * | 2010-04-23 | 2011-11-09 | 常州奥斯迈医疗器械有限公司 | Intramedullary nail device |
| US8491584B1 (en) * | 2012-04-13 | 2013-07-23 | Orthopedic Designs North America, Inc. | Intramedullary nail system with tang fixation |
| CN105395244A (en) * | 2015-11-23 | 2016-03-16 | 赵文 | Femoral intramedullary nail device |
| CN207024106U (en) * | 2017-02-09 | 2018-02-23 | 嘉兴市第二医院 | A kind of inner fixing device for fracture of neck of femur |
| CN109259842A (en) * | 2018-10-10 | 2019-01-25 | 苏州吉美瑞医疗器械股份有限公司 | A kind of femur marrow internal fixation nail |
| CN111658110A (en) * | 2020-06-22 | 2020-09-15 | 常州市康辉医疗器械有限公司 | Assembly type intramedullary nail system |
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| CN112472265B (en) | 2022-07-12 |
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