CN111281512A - Assembled proximal femur compression screw group - Google Patents
Assembled proximal femur compression screw group Download PDFInfo
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- CN111281512A CN111281512A CN202010125415.7A CN202010125415A CN111281512A CN 111281512 A CN111281512 A CN 111281512A CN 202010125415 A CN202010125415 A CN 202010125415A CN 111281512 A CN111281512 A CN 111281512A
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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
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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
- A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
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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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8605—Heads, i.e. proximal ends projecting from 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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8625—Shanks, i.e. parts contacting bone tissue
- A61B17/8635—Tips of screws
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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
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/8685—Pins or screws or threaded wires; nuts therefor comprising multiple separate 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
- A61B2017/564—Methods for bone or joint treatment
-
- 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
- A61B2017/681—Alignment, compression, or distraction mechanisms
Abstract
The embodiment of the invention relates to a matched stack type proximal femur compression screw group, which comprises a tool bit, a connecting part and a sleeve; the cutter head comprises a cutting part and a transmission part, and the outer wall of the transmission part is of a smooth structure; one end of the cutting part is connected with one end of the transmission part; the connecting part is of a hollow structure, and the outer wall of the connecting part is of a threaded structure; one end of the connecting component is connected with the other end of the transmission part; the other end of the transmission part and the connecting part are accommodated in the sleeve; when the connecting part rotates along the first direction under the action of the first external force, the cutting part is driven by the transmission part of the cutter head to move towards the direction close to the sleeve until the pressurizing screw group reaches the locking state. The assembled proximal femur compression screw group provided by the invention has the spiral blades with different lengths and the central locking structures with different lengths, so that the fracture ends can be better reset and more effectively fixed, the operation fixation is more reliable and reasonable, the fracture healing is promoted to the maximum extent, the curative effect of a patient is improved, and the occurrence of complications is reduced.
Description
Technical Field
The invention relates to the field of orthopedic medical instruments, in particular to a combined proximal femur compression screw group.
Background
Proximal femoral fractures including femoral neck fractures, intertrochanteric fractures and subtrochanteric fractures occur at a rate of about 7.3% of total adult fractures, and in elderly patients with fractures the rate of 23.8%. With the progression of aging of the global population, the incidence of proximal femoral fractures increases with age. It is reported that about 450 million new aged proximal femoral fractures occur every year in the world, and the number of patients with proximal femoral fractures in the world is expected to increase to 2100 million in the future 40 years, wherein the incidence rate of asians accounts for about 50% of the global incidence rate. The increasing need for treatment of proximal femoral fractures and the high living quality requirements of patients have become a challenge for orthopedists.
With the further research on the theory and technology of internal fixation instruments, open or closed reduction internal fixation is considered as the gold standard for treating proximal femoral fractures. The internal fixing device is selected from a locking steel plate, an intramedullary nail, a bridge connection combined type internal fixing device and the like. The proximal intramedullary nail internal fixation system for the femur structurally comprises an intramedullary nail main nail, a proximal locking nail, a distal locking nail and a tail cap.
At present, the spiral blade and the locking part of the existing proximal locking nail have single length, the difference between different types of fractures or different types of the same type of fracture is not considered, the optimal resetting and fixing effect is difficult to realize, and the effectiveness of internal fixation cannot be ensured.
Disclosure of Invention
The invention aims to provide a matched proximal femur compression screw group aiming at the defects of the prior art, in order to design a matched proximal femur compression screw group which meets the practical clinical requirements, the method carries out deep research and exploration on the fracture cases of the proximal femur of Chinese population with a large sample, methodologically adopts a digital proximal femur morphological three-dimensional measurement mode based on artificial intelligence and having independent intellectual property rights, can freely rotate and segment the generated three-dimensional CT image of the proximal femur fracture, and applies a three-dimensional measurement technology of combining three elements of points, lines and surfaces, the related indexes are measured with high precision, and finally a set of three-dimensional morphological parameter system of the proximal femoral fracture of Chinese population with a plurality of indexes is summarized and summarized, and the form and related parameters of the assembled proximal femur compression screw set are designed based on the parameter system. In order to further verify the matching performance of the designed proximal locking nail and the real femur, the invention adopts an internal fixation matching virtual matching technology which has independent intellectual property rights and is based on a virtual reality technology, matches the proximal locking nail with the proximal femur of the large sample Chinese population and repeatedly adjusts detailed parameters. By adopting the virtual matching technology, repeated adjustment and repeated verification can be carried out on the internal fixation model and the real bone model with less time consumption and lower cost.
The embodiment of the invention provides a matched stack type proximal femur compression screw group, which comprises a tool bit, a connecting part and a sleeve;
the cutter head comprises a cutting part and a transmission part, and the outer wall of the transmission part is of a smooth structure; one end of the cutting part is connected with one end of the transmission part;
the connecting part is of a hollow structure, and the outer wall of the connecting part is of a threaded structure; one end of the connecting part is connected with the other end of the transmission part;
the inner wall of the sleeve is of a smooth structure, and the other end of the transmission part and the connecting part are accommodated in the sleeve;
when the connecting component rotates along a first direction under the action of a first external force, the cutting part is driven by the transmission part of the cutter head to move towards the direction close to the sleeve until the assembled proximal femur compression screw group reaches a locking state.
Preferably, the transmission part comprises a first component and a second component, and the first component and the second component are integrally connected; the front end of the first component is connected with the cutting part, and the rear end of the first component is connected with the front end of the second component; the rear end of the second part is connected with the connecting part;
the outer diameter of the first part is larger than the inner diameter of the sleeve, and the outer diameter of the second part is smaller than the inner diameter of the sleeve;
the length of the second component is 16 mm-70 mm.
Preferably, when the connecting component rotates in a first direction under the action of a first external force, the first component and the second component drive the cutting part to move towards the direction close to the sleeve, and the assembled proximal femoral compression screw set reaches a locking state; and in a locking state, the distance between the rear end surface of the first component and the front end surface of the sleeve is 0.12-0.35 mm.
Preferably, the assembled proximal femoral compression screw set further comprises an anti-rotation nut; one end of the anti-rotation nut is sleeved on the other end of the connecting part and is contained in the sleeve; the other end of the anti-rotation nut is clamped at the other end of the sleeve and arranged outside the sleeve.
Preferably, the other end of the transmission part is clamped with one end of the connecting part.
Preferably, the section of the sleeve is spindle-shaped.
Preferably, the length of the assembled proximal femur compression screw set in the locking state is 70mm to 130 mm.
Preferably, the cutter head is of a hollow structure, and the cutting part and the transmission part are of an integrated structure; the cutting part is a spiral blade;
the length of the cutter head is 58 mm-118 mm; the length of the cutting part is 20 mm-50 mm.
Preferably, the central axis of the cutter head, the central axis of the connecting part and the central axis of the sleeve are on the same straight line.
Preferably, when the assembled proximal femur compression screw set is in a locked state and the connection component rotates in the second direction under the action of the second external force, the cutting portion is driven by the transmission portion of the cutting head to move in a direction away from the sleeve, and the assembled proximal femur compression screw set reaches an unlocked state.
According to the assembled proximal femur compression screw group provided by the embodiment of the invention, through the artificial intelligence-based digital three-dimensional measurement mode and the virtual matching technology for internal fixation based on the virtual reality technology, the assembled proximal femur compression screw group provided by the embodiment of the invention can meet the requirements of fracture end reduction and fixation of different types of fractures or different types of fracture. The spiral blade has spiral blades with various length specifications, and can be selected individually according to different types of fractures so as to realize more stable fixation; in addition, the assembled proximal femur compression screw set with different lengths of central locking structures can be selected according to the fracture separation degree. Through the conversion of the unlocking state of the near-end locking nail to the locking state, the resetting between fracture ends can be realized more individually and more accurately, the stress is proper, and the effectiveness of internal fixation is ensured.
Drawings
FIG. 1 is a schematic structural view of a assembled proximal femoral compression screw set according to an embodiment of the present invention in a locked state;
FIG. 2 is a cross-sectional view of a assembled proximal femoral compression screw set according to an embodiment of the present invention in a locked state;
FIG. 3 is a cross-sectional view of an unlocked state of a set of proximal femur compression screws according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a tool tip provided in accordance with an embodiment of the invention;
FIG. 5 is a schematic cross-sectional view of a cutting portion according to an embodiment of the present invention;
FIG. 6 is a side view of a tool bit provided in accordance with an embodiment of the invention;
FIG. 7 is a schematic structural diagram of a connecting member according to an embodiment of the present invention;
FIG. 8 is a side view of a coupling member provided in accordance with an embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view of a sleeve according to an embodiment of the present invention;
FIG. 10 is a schematic cross-sectional view of a sleeve according to an embodiment of the present invention;
FIG. 11 is a schematic structural view of an anti-rotation nut according to an embodiment of the present invention;
fig. 12 is a side view of an anti-rotation nut provided in accordance with an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
The assembled proximal femur compression screw group provided by the embodiment of the invention is applied to the fixation of fracture parts in femur fracture surgery. Fig. 1 and fig. 2 are a schematic structural view and a schematic sectional view of a assembled proximal femur compression screw set according to an embodiment of the present invention in a locked state; fig. 3 is a schematic cross-sectional view of a assembled proximal femur compression screw set according to an embodiment of the present invention in an unlocked state, which is shown in fig. 1 to 3, the assembled proximal femur compression screw set according to an embodiment of the present invention includes a cutting head 1, a connecting component 2 and a sleeve 3; preferably, the central axis of the cutting head 1, the central axis of the connecting part 2 and the central axis of the sleeve 3 are collinear, that is, the cutting head 1, the connecting part 2 and the sleeve 3 of the assembled proximal femur compression screw set are coaxial. The structure of each component of the assembled proximal femur compression screw set will be described below.
Fig. 4 is a schematic cross-sectional view of a cutter head 1 according to an embodiment of the present invention, where the cutter head 1 includes a cutting portion 11 and a transmission portion 12, and an outer wall of the transmission portion 12 has a smooth structure; one end of the cutting part 11 is connected with one end of the transmission part 12; preferably, the cutting head 1 is a hollow structure, and the cutting part 11 and the transmission part 12 are an integrated structure.
In a specific example, the cutting portion 11 may be a spiral blade, the cross section of which is specifically shown in fig. 5, and the length L3 of the cutting head 1 is 58mm to 118 mm.
The transmission part 12 may specifically include a first member 121 and a second member 122, the first member 121 and the second member 122 being integrally connected; the front end of the first member 121 is connected to the cutting part 11, and the rear end of the first member 121 is connected to the front end of the second member 122; the second part 122 can be understood as ending in the locking mechanism, the rear end of the second part 122 being connected to the connecting part 2; the first part 121 has an outer diameter larger than the inner diameter of the sleeve 3 and the second part 122 has an outer diameter smaller than the inner diameter of the sleeve 3. When the connecting component 2 rotates in the first direction under the action of a first external force, the cutting part 11 is driven by the first component 121 and the second component 122 to move towards the direction close to the sleeve 3, and the assembled proximal femur compression screw group reaches a locking state; in the locked state, the distance L2 between the rear end surface of the first member 121 and the front end surface of the sleeve 3 is 0.12mm to 0.35 mm.
It will be appreciated that to meet the needs of different fracture conditions, the present invention provides a plurality of different lengths of cutting portion 11 (helical blade) and proximal locking pins of the second member 122 (locking mechanism) wherein the length L5 of the second member 122 (locking mechanism) is 16mm to 70mm, one gauge every 2mm, the length L4 of the cutting portion 11 is 20mm to 50mm, and one unit every 5 mm. When the proximal femur compression screw is used, the proximal femur main screw is placed into the proximal femur medullary cavity, and after the depth and the angle are adjusted to proper depths and angles, a matched proximal femur compression screw group with a proper locking structure and a proper cutting part 11 length is selected to be placed according to different types of fractures or differences among different types of fractures of the same kind. In a specific example, for fracture of the base of femoral neck, the distance from the inner side edge of femoral head to the fracture line is shorter, and the proximal locking nail with shorter cutting part 11 is selected to be inserted, and for fracture of intertrochanteric femoral, the distance from the inner side edge of femoral head to the fracture line is longer, and the proximal locking nail with longer cutting part 11 is selected to be inserted; for femoral neck base part fracture or intertrochanteric fracture, when the separation of fracture ends is small, the proximal locking nail with the shorter locking mechanism length is selected for placing, and when the separation of fracture ends is large, the proximal locking nail with the longer locking mechanism length is selected for placing.
Fig. 7 is a schematic structural diagram of a connecting part 2 according to an embodiment of the present invention, where the connecting part 2 is a hollow structure, and an outer wall of the connecting part 2 is a threaded structure; one end of the connecting member 2 is connected to the other end of the transmission portion 12 of the cutter head 1.
The connecting part 2 may be a connecting bolt, one end of the connecting part 2 is used to connect with the other end of the transmission part 12, it should be noted that, there are many ways to connect the other end of the transmission part 12 with one end of the connecting part 2, in a preferred embodiment, the other end of the transmission part 12 is engaged with one end of the connecting part 2, fig. 6 is a side view of a cutter head 1 according to an embodiment of the present invention, and as shown in fig. 4 and 6, the other end of the transmission part 12 of the cutter head 1 is provided with a horseshoe-shaped clamping part, as shown in figure 7 again, the front end of the connecting part 2 is provided with a clamping part which is matched with the horseshoe-shaped clamping part arranged at the other end of the transmission part 12, so that the transmission part 12 of the cutter head 1 is clamped with the connecting part 2, in a more preferred embodiment, the horseshoe-shaped clamping portion is uniformly provided with a plurality of saw teeth, so that the stability of clamping the transmission portion 12 and the connecting component 2 is ensured.
The other end of the connecting part 2 is used for inserting a driver, the driver is inserted into the other end of the connecting part 2, and the driver drives the connecting part 2 to rotate and move horizontally in the sleeve 3, so that the cutting part 11 of the tool bit 1 is driven to move. The other end of the connecting part 2 is a stressed end face, the stressed end face is provided with a groove, and a person skilled in the art can set the shape of the groove, preferably, as shown in fig. 7 and 8, the other end of the connecting part 2 is preferably provided with a hexagonal groove, so that the connecting part is convenient to match with the rotary drive of the driver.
When the connecting part 2 rotates under the action of external force, the transmission part 12 is driven to horizontally slide in the sleeve 3 along the axial direction of the sleeve 3, and the cutting part 11, namely the spiral blade, is driven to horizontally move along the axial direction of the sleeve 3; when the external force is applied in the opposite direction, the horizontal movement direction of the transmission part 12 in the sleeve 3 is opposite, and the movement direction of the helical blade is also opposite.
Fig. 9 is a schematic cross-sectional view of a sleeve 3 according to an embodiment of the present invention, wherein the inner wall of the sleeve 3 is smooth, and it can be understood that the inner wall of the sleeve 3 is matched with the outer wall of the transmission part 12 of the cutter head 1, so as to achieve horizontal sliding of the transmission part 12 in the sleeve 3, and the other end of the transmission part 12 of the cutter head 1 and the connecting part 2 are accommodated in the sleeve 3.
The assembled proximal femur compression screw group is used in cooperation with the proximal femur main nail, the cross section of the proximal femur main nail is in a water drop shape which accords with anatomical morphological parameters of the proximal femur medullary cavity, and in order to be matched with the use and fixation of the proximal femur main nail, the section of the sleeve 3 is preferably arranged in a spindle shape, so that the anti-rotation effect is achieved, and particularly as shown in fig. 10, the proximal femur main nail penetrates through a nail locking hole in the proximal main nail and is driven into a bone.
Fig. 11 is a schematic structural view of an anti-rotation nut 4 according to an embodiment of the present invention, in a preferred embodiment, the assembled proximal femoral compression screw set further includes an anti-rotation nut 4, as shown in fig. 2 and 11, one end of the anti-rotation nut 4 is sleeved on the other end of the connecting component 2 and is accommodated in the sleeve 3, it can be understood that the inner wall of the anti-rotation nut 4 has a thread structure matching with the thread structure of the outer wall of the connecting component 2; the other end of the anti-rotation nut 4 is clamped at the other end of the sleeve 3 and is arranged outside the sleeve 3.
Further, fig. 12 is a side view of the anti-rotation nut 4 according to the embodiment of the present invention, in which a plurality of saw teeth are uniformly arranged on an end surface of the anti-rotation nut 4 to ensure the stability of the whole proximal locking nail.
As shown in fig. 3, the proximal locking nail is in an unlocked state, in which when the connecting part 2 is rotated in a first direction by a first external force, specifically, the driver is inserted into the hexagonal groove at the tail of the connecting part 2, the driver is rotated to connect the external thread of the driver with the internal thread of the anti-rotation nut 4, and the connecting part 2 is pushed to move horizontally toward the sleeve, so that the driving part 12 of the driver bit 1 drives the cutting part 11 to move toward the sleeve 3 until the external thread of the driver is completely separated from the internal thread of the anti-rotation nut 4, at this time, the gap between the driver bit 1 and the front end of the sleeve 3 is minimum, the assembled proximal femoral compression screw set reaches a locked state, and in the locked state, the length L1 of the assembled proximal femoral compression screw set is 70mm to 130 mm.
As shown in fig. 2, the proximal locking pin is in a locked state, and in this state, when the connecting part 2 is rotated in the second direction under the action of the second external force, specifically, the driver is inserted into the hexagonal groove at the tail of the connecting part 2, the driver is rotated in the opposite direction, so that the external thread of the driver is connected with the internal thread of the anti-rotation nut 4, the connecting part 2 is pushed to move horizontally in the direction away from the sleeve, and the driving part 12 of the driver bit 1 drives the cutting part 11 to move in the direction away from the sleeve 3 until the driver cannot rotate, at this time, the driver bit 1 has the maximum axial displacement relative to the sleeve 3, and the assembled proximal femoral compression screw set reaches an unlocked state. It will be appreciated that the first direction and the second direction are opposite here.
The above description is provided for the components of the assembled proximal femur compression screw set and the connection relationship therebetween according to the embodiment of the present invention, and the following description is provided for the usage of the assembled proximal femur compression screw set that needs to be used with the proximal femur main nail and the distal locking nail with reference to fig. 2 and 3.
The proximal femur main nail is placed in the proximal femur medullary cavity, and after the depth and the angle are adjusted to proper depth and angle, a matched proximal femur compression screw group with a proper central locking structure length is selected according to the difference between different types of fractures or fractures of the same type.
Inserting the driver into the tail end of the proximal locking nail, namely the connecting component 2, unlocking the spiral blade to enable the proximal locking nail to be in an unlocking state, placing the proximal locking nail into the proximal locking nail through a spindle-shaped locking nail hole of the proximal femur main nail, lightly knocking the bottom of the driver by a hammer, driving the proximal locking nail into a proper position under fluoroscopy, rotating the driver in a locking direction until locking is achieved, enabling the proximal locking nail to be in a locking state, completing the placement of the proximal locking nail, and then placing the distal locking nail into the proximal locking nail through a distal locking nail hole of the main nail. Locking the implanted proximal locking pin to a locked state, a procedure that resets the detached fracture end. Because the assembled proximal femur compression screw group with different lengths of central locking structures can be selected according to the fracture separation degree, the fracture ends can be better reset and the stress is proper.
The assembled proximal femur compression screw group provided by the embodiment of the invention solves the problems that the length of a spiral blade of a proximal locking nail is single, and individual selection cannot be carried out according to different types of fractures so as to realize more stable fixation; the problem of central authorities locking structure length singleness, can not select according to fracture separation degree to realize more individualized and more accurate reduction between the fracture end is solved. By solving the problems, the operation fixation of the proximal femur fracture is more reliable and reasonable, the fracture healing is promoted to the maximum extent, the curative effect of a patient is improved, and the occurrence of complications is reduced.
In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "a particular embodiment," "some embodiments," "an embodiment," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A matched stack type proximal femur compression screw group is characterized by comprising a tool bit, a connecting component and a sleeve;
the cutter head comprises a cutting part and a transmission part, and the outer wall of the transmission part is of a smooth structure; one end of the cutting part is connected with one end of the transmission part;
the connecting part is of a hollow structure, and the outer wall of the connecting part is of a threaded structure; one end of the connecting part is connected with the other end of the transmission part;
the inner wall of the sleeve is of a smooth structure, and the other end of the transmission part and the connecting part are accommodated in the sleeve;
when the connecting component rotates along a first direction under the action of a first external force, the cutting part is driven by the transmission part of the cutter head to move towards the direction close to the sleeve until the assembled proximal femur compression screw group reaches a locking state.
2. The set of modular proximal femoral compression screws of claim 1, wherein the transmission portion comprises a first component and a second component, the first and second components being integrally connected; the front end of the first component is connected with the cutting part, and the rear end of the first component is connected with the front end of the second component; the rear end of the second part is connected with the connecting part;
the outer diameter of the first part is larger than the inner diameter of the sleeve, and the outer diameter of the second part is smaller than the inner diameter of the sleeve;
the length of the second component is 16 mm-70 mm.
3. The set of matched proximal femoral compression screws of claim 2, wherein the set of matched proximal femoral compression screws reaches the locked state when the coupling member is rotated in a first direction by a first external force, the cutting portion is moved closer to the sleeve by the first and second members; and in a locking state, the distance between the rear end surface of the first component and the front end surface of the sleeve is 0.12-0.35 mm.
4. The set of modular proximal femoral compression screws of claim 1, further comprising an anti-rotation nut; one end of the anti-rotation nut is sleeved on the other end of the connecting part and is contained in the sleeve; the other end of the anti-rotation nut is clamped at the other end of the sleeve and arranged outside the sleeve.
5. The set of proximal femoral compression screws of claim 1, wherein the other end of the driving portion is snap-fitted to one end of the connecting member.
6. The set according to claim 1, wherein the barrel has a spindle-shaped cross-section.
7. The set of modular proximal femoral compression screws of claim 1, wherein the set of modular proximal femoral compression screws has a length of 70mm to 130mm in the locked state.
8. The set of modular proximal femoral compression screws of claim 1, wherein the cutting head is a hollow structure and the cutting portion and the driving portion are a unitary structure; the cutting part is a spiral blade;
the length of the cutter head is 58 mm-118 mm; the length of the cutting part is 20 mm-50 mm.
9. The set of modular proximal femoral compression screws of claim 1, wherein the central axis of the cutting head, the central axis of the coupling member and the central axis of the sleeve are collinear.
10. The set of proximal compression screws of claim 1, wherein when the set of proximal compression screws is in the locked state, the cutting portion is moved away from the sleeve by the driving portion of the cutting head when the connecting member is rotated in the second direction by the second external force, and the set of proximal compression screws reaches the unlocked state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010125415.7A CN111281512A (en) | 2020-02-27 | 2020-02-27 | Assembled proximal femur compression screw group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010125415.7A CN111281512A (en) | 2020-02-27 | 2020-02-27 | Assembled proximal femur compression screw group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111281512A true CN111281512A (en) | 2020-06-16 |
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| CN202010125415.7A Pending CN111281512A (en) | 2020-02-27 | 2020-02-27 | Assembled proximal femur compression screw group |
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| CN201701289U (en) * | 2010-04-23 | 2011-01-12 | 创生医疗器械(江苏)有限公司 | Lag screw |
| US20140214034A1 (en) * | 2013-01-25 | 2014-07-31 | Fady Rayes | Cannulated telescopic femoral neck screw device and related fixation method |
| CN104055567A (en) * | 2014-07-10 | 2014-09-24 | 苏州吉美瑞医疗器械有限公司 | Locking nail of PFNA |
| CN205924137U (en) * | 2016-06-01 | 2017-02-08 | 黄耀斌 | A prevent rotatory internal fixation device for femoral neck fracture |
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| US20030069582A1 (en) * | 2001-03-30 | 2003-04-10 | Culbert Brad S. | Method and apparatus for bone fixation with secondary compression |
| CN101426442A (en) * | 2006-04-21 | 2009-05-06 | 新特斯有限责任公司 | Hip helical implant |
| CN101116635A (en) * | 2007-09-18 | 2008-02-06 | 北京大学人民医院 | Anti-rotating self-locking bone fracture internal fixing device |
| CN201333077Y (en) * | 2008-11-27 | 2009-10-28 | 常州亨杰医疗器械有限公司 | Spiral tension blade for orthopedics implants |
| CN101601605A (en) * | 2009-07-14 | 2009-12-16 | 常州市康辉医疗器械有限公司 | Intramedullary nail fixation device for fractured near end of thighbone |
| CN201701286U (en) * | 2009-12-24 | 2011-01-12 | 北京理贝尔生物工程研究所有限公司 | Proximal femoral nail system |
| CN201624765U (en) * | 2010-01-29 | 2010-11-10 | 厦门大博颖精医疗器械有限公司 | Proximal femoral internal fixer |
| CN201701289U (en) * | 2010-04-23 | 2011-01-12 | 创生医疗器械(江苏)有限公司 | Lag screw |
| US20140214034A1 (en) * | 2013-01-25 | 2014-07-31 | Fady Rayes | Cannulated telescopic femoral neck screw device and related fixation method |
| CN104055567A (en) * | 2014-07-10 | 2014-09-24 | 苏州吉美瑞医疗器械有限公司 | Locking nail of PFNA |
| CN205924137U (en) * | 2016-06-01 | 2017-02-08 | 黄耀斌 | A prevent rotatory internal fixation device for femoral neck fracture |
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