CN112704556A - Anti-sinking anti-rotation rectangular wedge-shaped intramedullary fixation device for orthopedics department - Google Patents
Anti-sinking anti-rotation rectangular wedge-shaped intramedullary fixation device for orthopedics department Download PDFInfo
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- CN112704556A CN112704556A CN202011532784.4A CN202011532784A CN112704556A CN 112704556 A CN112704556 A CN 112704556A CN 202011532784 A CN202011532784 A CN 202011532784A CN 112704556 A CN112704556 A CN 112704556A
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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
- A61B17/7258—Intramedullary pins, nails or other devices with special means of locking the nail to the bone with laterally expanding parts, e.g. for gripping the bone
- A61B17/7275—Intramedullary pins, nails or other devices with special means of locking the nail to the bone with laterally expanding parts, e.g. for gripping the bone with expanding cylindrical parts
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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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Abstract
The invention relates to an anti-sinking anti-rotation rectangular wedge-shaped orthopedic intramedullary fixing device, which comprises: a main nail; the upper part of the main nail is in a wedge-shaped rectangular shape, namely, the four sides of the upper part of the main nail are respectively arranged to be in semicircular gradual change or trapezoidal gradual change; the main nail upper part, the main nail lower part, the main nail upper part and the main nail lower part are respectively provided with corresponding taper degrees, so that the problems of sinking and rotation in marrow of the main nail caused by external force are solved, the main nail can be more firmly and more stably embedded along with the external force traction pressure, the initial stability of internal fixation of fracture is achieved, the main nail is inserted into a proper position after a circular drill is drilled, the rectangular four corners of the main nail can form four corners for fixation on the inner wall of the circular marrow cavity, and simultaneously a semicircular channel is formed in the circular marrow cavity to increase blood circulation and promote bone ingrowth, and the wedge-shaped anti-sinking fixation and anti-rotation mechanical effects are achieved.
Description
Technical Field
The invention belongs to the technical field of orthopedic instruments, and particularly relates to an anti-sinking anti-rotation rectangular wedge-shaped orthopedic intramedullary fixing device.
Background
The existing intramedullary nail is fixed to be a cylindrical smooth structure, proximal end nail removal and fracture displacement are caused by continuous descending along with a circle inside a circular drilling hole of a medullary cavity, collapse type sinking is caused along with human body pressure enhancement and osteoporosis, rotation longitudinal cutting is caused in plant medulla along with human skeleton twisting, operation failure is finally caused, the smooth structure of a main nail is fully contacted with the inner wall of the medullary cavity in the medullary cavity, foreign body sensation of a user is enhanced, postoperative thigh pain is caused, and pain and economic loss which cannot be abraded are caused to a patient.
Therefore, it is necessary to develop a new anti-subsidence anti-rotation rectangular wedge-shaped intramedullary fixation device for orthopedics department to solve the above problems.
Disclosure of Invention
The invention aims to provide an anti-sinking anti-rotation rectangular wedge-shaped orthopedic intramedullary fixing device.
In order to solve the technical problem, the invention provides an anti-sinking anti-rotation rectangular wedge-shaped orthopedic intramedullary fixation device, which comprises: a main nail; the main nail upper part, the main nail lower part, the main nail upper part and the main nail lower part are respectively provided with corresponding taper, and the main nail upper part is in a wedge-shaped rectangular shape, namely, the four sides of the main nail upper part are respectively arranged to be in semicircular gradual change or trapezoidal gradual change.
Furthermore, the caliber from the top end of the upper part of the main nail to the bottom end of the lower part of the main nail is gradually reduced.
Furthermore, an eccentric angle of 1-3 degrees is arranged from the top end of the upper part of the main nail to the bottom end of the upper part of the main nail, and an outward turning angle of 4-10 degrees is arranged between the upper part of the main nail and the lower part of the main nail in the axial vertical direction.
Furthermore, the left side and the right side of the main nail are provided with corresponding tapers so as to form an irregular four-edge shape with a wide upper part and a narrow lower part.
Further, the rear side of the main nail is provided with a trapezoidal plane shape with a wide upper part and a narrow lower part, namely, after the round drill punches a hole on the marrow, the main nail is inserted into the round marrow cavity to form a semicircular cavity.
Furthermore, the upper part of the main nail is provided with a mounting hole which is obliquely arranged towards the lower part of the main nail; the mounting holes are suitable for mounting corresponding fixing pieces.
Further, the mounting hole matches with gamma prismatic tool bit, promptly the mounting is gamma prismatic tool bit, just gamma prismatic tool bit is fixed through corresponding extension sealing cap.
Further, the mounting hole matches with the double fixing nail of primary and secondary, promptly the mounting is the double fixing nail of primary and secondary, just the double fixing nail of primary and secondary is fixed through corresponding extension sealing cap.
Further, the upper part and the lower part of the main nail are provided with transverse locking nail holes for installing transverse locking screws; the transverse locking screw is adapted to fix the main nail to the bone.
Furthermore, three through S-shaped pressure reducing grooves and six pressure reducing grooves are formed in the lower portion of the main nail; the far end of the main nail is provided with a fixing hole and a sliding pressurizing hole, and the sliding pressurizing hole is provided with a plurality of longitudinal openings.
The invention has the advantages that the upper part of the main nail, the lower part of the main nail, the upper part of the main nail and the lower part of the main nail are respectively provided with corresponding taper degrees, the problems of sinking and rotation in marrow of the main nail caused by external force are solved, the main nail can be more tightly and more stably inserted along with the action of external force traction pressure, the initial stability of fracture internal fixation is thoroughly achieved by the principle of gamma mechanics near-end transverse locking, the main nail is inserted into a proper position after a circular drill is drilled, the rectangular four corners of the main nail are fixed by forming four corners on the inner wall of a circular marrow cavity, and simultaneously, a semicircular channel is formed in the circular marrow cavity to increase blood circulation and promote bone ingrowth, and the wedge-shaped anti-sinking fixation and anti-rotation mechanics effects are realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a structural diagram of an anti-subsidence anti-rotation rectangular wedge-shaped orthopedic intramedullary fixation device of the present invention;
FIG. 2 is a partial view of the invention at A;
FIG. 3 is a top view of the anti-subsidence anti-rotation rectangular wedge-shaped orthopedic intramedullary fixation device of the present invention;
FIG. 4 is a partial view of the invention at B;
FIG. 5 is a cross-sectional view at G-G of the present invention;
FIG. 6 is a cross-sectional view taken at J-J of the present invention;
FIG. 7 is a cross-sectional view taken at H-H of the present invention;
FIG. 8 is a block diagram of one embodiment of a mount of the present invention;
fig. 9 is a structural view of another embodiment of the fixing member of the present invention.
In the figure:
the main nail 1, the main nail upper part 11, the main nail lower part 12, the mounting hole 13, the gamma prismatic cutter head 131, the primary and secondary double fixing nails 132, the transverse locking nail hole 14, the transverse locking screw 141, the through S-shaped decompression groove 15, the decompression groove 16, the sliding pressurizing hole 17 and the fixing hole 18.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent 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.
Example 1
FIG. 1 is a structural diagram of an anti-subsidence anti-rotation rectangular wedge-shaped orthopedic intramedullary fixation device of the present invention;
FIG. 2 is a partial view of the invention at A;
FIG. 3 is a top view of the anti-subsidence anti-rotation rectangular wedge-shaped orthopedic intramedullary fixation device of the present invention;
fig. 4 is a partial view at B of the present invention.
In this embodiment, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, the present embodiment provides an anti-subsidence anti-rotation rectangular wedge-shaped intramedullary fixation device for orthopedics department, which comprises: a main nail 1; the main nail upper part 11, the main nail lower part 12, the main nail upper part 11 and the main nail lower part 12 are respectively provided with corresponding taper, and the main nail upper part 11 is in a wedge-shaped rectangular shape, namely, four sides of the main nail upper part 11 are respectively set to be in semicircular gradual change or trapezoidal gradual change.
In the embodiment, one surface of the main nail 1 is semicircular, so that the main nail can be better combined with the semicircle of the medullary cavity wall; the other three sides of the main nail 1 are in trapezoidal gradual change, and the functions of preventing sinking and resisting rotation are achieved.
In the embodiment, the main nail 1 is made of titanium alloy material, and the shape of the main nail 1 is anatomical left and right according to the physiological curve of the femoral shaft.
In the embodiment, the anti-subsidence anti-rotation rectangular wedge-shaped orthopedic intramedullary fixing device is used for internal fixation of intertrochanteric and lower femoral head fractures and femoral shaft fixation of orthopaedics.
In this embodiment, different tapers are formed among the main nail upper part 11, the main nail lower part 12, the main nail upper part 11 and the main nail lower part 12, so that the circular drill is tapered and wedged into a proper position to form a wedge-shaped sunken type insert after being punched to play a role in mechanical sunken type fastening, that is, the circular drill is more stable after being sunken by one millimeter.
In this embodiment, the four sides of the main nail upper portion 11 are respectively arranged to be semi-circular gradually changed or trapezoidal gradually changed, so as to play a role in preventing sinking and rotation.
In this embodiment, the main nail upper portion 11, the main nail lower portion 12, and corresponding tapers are respectively arranged between the main nail upper portion 11 and the main nail lower portion 12, so that the problems of sinking and rotation in the marrow of the main nail 1 caused by external force are solved, the main nail 1 can be more firmly and firmly embedded along with the external force traction pressure, the initial stability of fracture internal fixation is thoroughly achieved by the aid of the gamma mechanics near-end transverse locking principle, the main nail 1 is inserted into a proper position after a circular drill is drilled, four rectangular corners of the main nail 1 are fixed by forming four corners on the inner wall of the circular medullary cavity, and simultaneously, semicircular channels are formed in the circular medullary cavity to increase blood transportation and promote bone ingrowth, and wedge-shaped anti-sinking fixation and anti-rotation mechanics effects are achieved.
In the present embodiment, referring to fig. 1 and fig. 3, the caliber decreases from the top end of the main nail upper portion 11 to the bottom end of the main nail lower portion 12.
In this embodiment, referring to fig. 1, an eccentric angle of 1-3 ° (preferably 1.7 ° in this embodiment) is provided from the top end of the main nail upper portion 11 to the bottom end of the main nail upper portion 11, and an eversion angle of 4-10 ° (preferably 5 ° in this embodiment) is provided in the axial direction perpendicular to the main nail upper portion 11 and the main nail lower portion 12.
In the embodiment, the implantation surface of the main nail 1 is matched with the circular drilling hole in a matching way, namely, the lower part 12 of the main nail is inserted into the circular drilling hole, and an eccentric angle of 1.7 degrees forms axial mechanical fit tightness to ensure that the main nail 1 fits the inner wall of the medullary cavity between the rotors of the thighbones to form a biomechanical inlay so as to increase the stability, and the biomechanical axis principle of a human body is that a standing line of the human body which is invariable forever is formed from the center of the femoral head to the center of the condyle of the thighbones to the two toes; the 5-degree eversion angle is convenient to better accord with the curvature of the proximal force line of the femur, and the biomechanical stable insertion and fit degree is achieved.
In this embodiment, the left side and the right side of the main nail 1 are provided with corresponding tapers so as to form an irregular four-edge shape with a wide upper part and a narrow lower part, the round drilling holes are inserted to play a role in anti-rotation mechanics, and adverse effects caused by deformation and distortion of intramedullary fixation objects due to other or linear insertion can be avoided.
In this embodiment, referring to fig. 1 and fig. 3, the rear side of the main nail 1 is provided with a trapezoidal plane shape with a wide upper part and a narrow lower part, that is, after the round drill is used for drilling a hole in the marrow, the main nail 1 is inserted into the round marrow cavity to form a semicircular cavity, and the gamma prismatic bit 131 or the primary and secondary double fixing nails 132 play a role of mechanical cavity pressure when sliding, tightening and locking, so that the fracture ends are more engaged and stable.
In the present embodiment, the main nail upper part 11 is provided with a mounting hole 13, and the mounting hole 13 is arranged obliquely to the main nail lower part 12; the mounting holes 13 are adapted to mount corresponding fasteners.
Figure 8 is a block diagram of one embodiment of a fastener of the present invention.
In this embodiment, as shown in fig. 8, as an embodiment of the fixing member, the mounting hole 13 is matched with the gamma prismatic bit 131, that is, the fixing member is the gamma prismatic bit 131, and the gamma prismatic bit 131 is fixed by a corresponding lengthened sealing cap.
In this embodiment, the gamma-ray prismatic bit 131 is inserted into the bone and slides and locks to tighten the fracture end, and has the functions of locking by pressing and locking and tightening the top thread to prevent the longitudinal cutting from rotating.
FIG. 5 is a cross-sectional view at G-G of the present invention.
In this embodiment, as shown in fig. 5, while the main nail 1 is inserted and inserted stably, the gamma prismatic bit 131 is disposed at 30-60 degrees (preferably 50 degrees in this embodiment) in the lower part 12 of the oblique main nail to match the fracture alignment between the trochanter and the tuberosity part of the femur, and the lateral locking nail hole 14 is provided to achieve the purpose of stable healing of the initial fracture, i.e. the oblique conduction of gamma mechanics and the lateral locking by the vertical gravity of the human body can achieve the optimal initial stability of fracture, facilitating the stable growth of fracture.
Fig. 9 is a structural view of another embodiment of the fixing member of the present invention.
In this embodiment, as shown in fig. 9, as another embodiment of the fixing element, the mounting hole 13 is matched with a primary and secondary double fixing nail 132, that is, the fixing element is the primary and secondary double fixing nail 132, and the primary and secondary double fixing nails 132 are fixed by a corresponding lengthened sealing cap.
In the present embodiment, the main nail upper part 11 and the main nail lower part 12 are both provided with a transverse locking nail hole 14 for installing a transverse locking screw 141; the transverse locking screw 141 is adapted to fix the main nail 1 to the bone.
In this embodiment, after the main nail 1 is inserted into the medullary cavity to form fixation, a better proximal stability is achieved at a position just below the lesser trochanter of femur, the transverse locking nail hole 14 transversely penetrates the main nail 1, and the transverse locking screw 141 comprises a nail cap and a screw rod, and the main nail 1 is fixed with the bone through the transverse locking nail hole 14.
In this embodiment, the corresponding mounting member is coupled with the transverse locking screw 141 to achieve better initial stability of the fracture.
FIG. 6 is a cross-sectional view taken at J-J of the present invention;
fig. 7 is a cross-sectional view at H-H of the present invention.
In the present embodiment, as shown in fig. 6 and 7, the main nail lower part 12 is provided with three through S-shaped pressure-reducing grooves 15 and six pressure-reducing grooves 16; the distal end of the main nail 1 is provided with a fixing hole 18 and a sliding pressurizing hole 17, and the sliding pressurizing hole 17 is a multi-longitudinal opening to play a role in changing stress conduction and reducing the problems of foreign body sensation in the body of a user and postoperative thigh pain.
In this embodiment, three through S-shaped pressure relief slots 15 are long helical slots and six pressure relief slots 16 are short helical slots.
In this embodiment, the three through S-shaped pressure relief slots 15 avoid excessive foreign body sensation caused by the linear conduction of force, changing the direct conduction direction of the force by the linear groove through the S-groove design to cause a direct sensation; the S groove well changes the force transmission and reduces the intramedullary feeling, the pressure reducing effect of the six pressure reducing grooves 16 at the far end of the main nail 1 well reduces the postoperative foreign body feeling and thigh pain of a patient, and the rigid principle of the hard titanium alloy is changed by the vertical opening of the sliding pressurizing hole 17 and the thin cutting process of the inner hole wall, so that the secondary damage caused by direct contact and impact with the inner wall of the medullary cavity is avoided.
In conclusion, the invention solves the problems of sinking and rotating in marrow of the main nail caused by external force by respectively arranging corresponding taper angles between the upper part of the main nail, the lower part of the main nail and the lower part of the main nail, and can lead the main nail to be inserted more tightly and more stably along with the action of external force traction pressure, and thoroughly achieves the initial stability function of internal fixation of fracture by being accompanied with the principle of gamma mechanics near-end transverse locking; compared with other traditional products, the main nail of the anti-sinking anti-rotation rectangular wedge-shaped orthopedic intramedullary fixing device adopts a trapezoidal rectangular design with a wide upper part and a narrow lower part, the transverse locking nail hole is designed at the part below the lesser trochanter to increase the initial fracture stability, the anti-sinking insertion capacity of the trapezoidal rectangular shape can be enhanced, a three-surface gradual change type trapezoidal rectangular structure is adopted, a good anti-rotation effect can be formed in a circular cavity of the circular drilling hole through the contact of four rectangular walls, the rectangular structure design is used for forming four corners in the medullary cavity and fixing the four corners in the medullary cavity to reserve a semicircular cavity channel for forming blood transportation and promoting bone ingrowth, and the better initial stability has a better protection effect on maintaining the healing of the fractured ends under the condition of fractured end fracture, the effect of the initial stability of the fractured ends is realized, the circular drilling hole can lead the gamma prismatic tool bit and the primary and secondary double fixing nails to better stabilize the fractured end healing, the transverse locking nail hole is arranged to increase the initial fracture stability, and the transverse locking screw is matched to obliquely fix the transverse interception mechanics principle according to the gamma mechanics principle to achieve the initial stability so as to promote the bone ingrowth healing; the lower part of the main nail is provided with three through S-shaped pressure reducing grooves and three pressure reducing grooves, the direct trend of force is changed to reduce the foreign body sensation of a patient, and the rigid principle of the hard titanium alloy can be changed to avoid the secondary damage caused by direct contact and impact with the inner wall of the medullary cavity by adopting the vertical opening and inner hole wall thinning process.
The components selected for use in the present application (components not illustrated for specific structures) are all common standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experimentation.
In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
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 light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The utility model provides an anti-subsidence anti-rotation rectangular wedge-shaped orthopedic intramedullary fixing device which is characterized in that:
a main nail; wherein
Corresponding tapers are respectively arranged on the upper part of the main nail, the lower part of the main nail, the upper part of the main nail and the lower part of the main nail, and the upper part of the main nail is in a wedge-shaped rectangular shape, namely
The four sides of the upper part of the main nail are respectively arranged to be in semicircular gradual change or trapezoidal gradual change.
2. The anti-subsidence anti-rotation rectangular wedge-shaped orthopedic intramedullary fixation device of claim 1,
and the caliber from the top end of the upper part of the main nail to the bottom end of the lower part of the main nail is gradually reduced.
3. The anti-subsidence anti-rotation rectangular wedge-shaped orthopedic intramedullary fixation device of claim 2,
an eccentric angle of 1-3 degrees is arranged from the top end of the upper part of the main nail to the bottom end of the upper part of the main nail, and an outward-turning angle of 4-10 degrees is arranged between the upper part of the main nail and the lower part of the main nail in the axial vertical direction.
4. The anti-subsidence anti-rotation rectangular wedge-shaped orthopedic intramedullary fixation device of claim 3,
the left side and the right side of the main nail are provided with corresponding tapers so as to form an irregular four-edge shape with a wide upper part and a narrow lower part.
5. The anti-subsidence anti-rotation rectangular wedge-shaped orthopedic intramedullary fixation device of claim 4,
the rear side of the main nail is provided with a trapezoidal plane shape with a wide upper part and a narrow lower part, namely
After the round drill perforates the medulla, the main nail is inserted into the round medullary cavity to form a semi-circle cavity.
6. The anti-subsidence anti-rotation rectangular wedge-shaped orthopedic intramedullary fixation device of claim 1,
the upper part of the main nail is provided with a mounting hole, and the mounting hole is obliquely arranged towards the lower part of the main nail;
the mounting holes are suitable for mounting corresponding fixing pieces.
7. The anti-subsidence anti-rotation rectangular wedge-shaped orthopedic intramedullary fixation device of claim 6,
the mounting holes are matched with the gamma prismatic tool bits, i.e.
The fixing piece is a gamma prismatic cutter head, and the gamma prismatic cutter head is fixed through a corresponding lengthened sealing cap.
8. The anti-subsidence anti-rotation rectangular wedge-shaped orthopedic intramedullary fixation device of claim 6,
the mounting holes are matched with the primary and secondary double fixing nails, i.e.
The mounting is two staple of primary and secondary, just two staple of primary and secondary are fixed through corresponding extension sealing cap.
9. The anti-subsidence anti-rotation rectangular wedge-shaped orthopedic intramedullary fixation device of claim 1,
the upper part and the lower part of the main nail are provided with transverse locking nail holes for installing transverse locking screws;
the transverse locking screw is adapted to fix the main nail to the bone.
10. The anti-subsidence anti-rotation rectangular wedge-shaped orthopedic intramedullary fixation device of claim 1,
three through S-shaped pressure reducing grooves and six pressure reducing grooves are formed in the lower portion of the main nail;
the far end of the main nail is provided with a fixing hole and a sliding pressurizing hole, and the sliding pressurizing hole is provided with a plurality of longitudinal openings.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011532784.4A CN112704556A (en) | 2020-12-22 | 2020-12-22 | Anti-sinking anti-rotation rectangular wedge-shaped intramedullary fixation device for orthopedics department |
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| CN202011532784.4A CN112704556A (en) | 2020-12-22 | 2020-12-22 | Anti-sinking anti-rotation rectangular wedge-shaped intramedullary fixation device for orthopedics department |
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| CN212140562U (en) * | 2020-02-27 | 2020-12-15 | 天津市威曼生物材料有限公司 | Assembled anatomical intramedullary fixation device for proximal femur fracture |
| CN212066842U (en) * | 2020-03-25 | 2020-12-04 | 焦作市新港医疗设备有限公司 | Intramedullary support rod and proximal femur end provided with same |
| 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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