CN110478024B - Auxiliary reduction internal fixing device for femoral neck fracture - Google Patents
Auxiliary reduction internal fixing device for femoral neck fracture Download PDFInfo
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- CN110478024B CN110478024B CN201910877976.XA CN201910877976A CN110478024B CN 110478024 B CN110478024 B CN 110478024B CN 201910877976 A CN201910877976 A CN 201910877976A CN 110478024 B CN110478024 B CN 110478024B
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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
- A61B17/746—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 a plate opposite the femoral head
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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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8004—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones
- A61B17/8014—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones the extension or compression force being caused by interaction of the plate hole and the 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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
- A61B17/8057—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded the interlocking form comprising a thread
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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
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8061—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates specially adapted for particular bones
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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
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Abstract
The invention provides a femoral neck fracture internal fixation device for assisting reduction, which is characterized in that the internal fixation device body at least comprises an arc-shaped joint part which is matched with the inner side of a femoral neck and is used for assisting reduction and a fixing and supporting part which is used for being jointed with a fracture far end, and further comprises a tip part which is arranged at the top end of the arc-shaped joint part and is used for controlling the rotation of the fracture near end. The invention has the advantages of simple structure, simple and flexible operation and the like, effectively solves the problem of the shearing force of the fracture part in the traditional operation, shortens the operation time and the recovery time, and has good social benefit and economic benefit.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an internal fixing device for femoral neck fracture difficult to reset, which can enhance the stability of the fracture after fixation while assisting in resetting.
Background
The fracture of the neck of femur is a common fracture in clinic, and is divided into adduction fracture and abduction fracture according to the included angle between a fracture line and the horizontal line of the pelvis. For adducted fractures, there is often significant displacement of the fracture, which is very unstable due to local anatomical features.
The traditional treatment method is closed reduction hollow nail internal fixation, but the adduction type femoral neck fracture is very unstable, and the closed reduction cannot control the proximal end of the fracture, so the reduction is very difficult. The fracture is characterized in that the fracture proximal end (namely the femoral head part) is in a free state in a joint cavity due to lack of attachment of muscle ligaments, when an included angle between a fracture line and a horizontal line is large (namely an adduction type fracture), the fracture broken end is subjected to large shearing force and torsional force, and displacement is easy to generate, and in addition, the fracture proximal end is in a free state, and is difficult to control during reduction, so that reduction is difficult. Even if the reduction is successful, the fracture end is easy to displace again in the fixing process or after the fixation due to the existence of higher shearing force.
In addition, since the fracture line of the adduction-type fracture is generally perpendicular, the shear force at the fracture site cannot be solved even after the closed reduction is successfully performed and the hollow nail is internally fixed, the rate of the fracture re-displacement is very high, and finally, the femoral neck is shortened and healed or the femoral neck fracture is not healed.
Therefore, there is a need for a reduction-assisting fixing device to solve the problems of difficult reduction of the neck-adduction fracture and large shearing force at the fracture end.
Disclosure of Invention
According to the technical problem that the adduction type femoral neck fracture is difficult to reset, the internal femoral neck fracture fixing device for assisting in resetting is provided. The invention mainly utilizes the tip part to be positioned with the joint part of the femoral neck firstly and then the arc-shaped fitting part to assist the reduction, thereby achieving the effects of convenient control of the near end, auxiliary reduction, reduction of the operation difficulty, high reduction stability and the like.
The technical means adopted by the invention are as follows:
the utility model provides a supplementary thighbone neck fracture internal fixation device who resets, the internal fixation device body has at least with thighbone neck inboard looks adaptation, be used for supplementary arc laminating portion that resets and be used for the fixed support portion of laminating mutually with the distal end of fracture, its characterized in that, the internal fixation device body is still including setting up the tip that is used for controlling the proximal end of fracture rotation on arc laminating portion top.
Further, the tip has a non-right circular cross-sectional configuration for insertion into a femoral head and neck junction.
Furthermore, the cross section of the tip part changes in a tapered manner from the tail end to the head of the tip part, so that the head part of the tip part is easy to penetrate into the femoral head-neck combination part.
Furthermore, the included angle between the tangent line of the outer surface at the top end of the arc-shaped attaching part and the connecting line from the head part of the tip part to the upper surface of the tail end part is 90-150 degrees.
Furthermore, the arc-shaped joint part is jointed with the arc-shaped bone surface on the inner side of the femoral neck, and a first locking pressurization threaded hole for controlling the proximal end of the fracture is arranged on the arc-shaped joint part. The arc-shaped fitting part can be provided with various specifications, different lengths and different radians as required for fitting the femoral neck with different anatomical characteristics.
Further, the first locking compression threaded hole is locked and fixed by using a locking screw or is slidably compressed and fixed by using a common screw, and the axial direction of the compression threaded hole points to the skull direction of a human body.
Furthermore, the fixing and supporting part is jointed with the fracture far end, and at least two second locking and pressurizing threaded holes for controlling the fracture far end are arranged on the fixing and supporting part.
Further, the second locking pressurization threaded hole is locked and fixed by using a locking screw or is fixed by sliding and pressurizing by using a common screw, and the axial direction of the pressurization threaded hole points to the direction of the feet of the human body.
Furthermore, arc laminating portion with fixed supporting part adopts solid structure or porous structure, and porous structure can reduce the area of contact of device and bone face to reduce the destruction to periosteum blood circulation, porous structure can reduce internal fixation device's modulus of elasticity simultaneously, reduces and shelters from the stress to the sclerotin.
Further, the internal fixation device is made of a titanium alloy or a tantalum metal material.
Compared with the prior art, the invention has the following advantages:
1. the tip part provided by the invention can be inserted into the femoral head and neck combination part at the proximal end of the fracture through a small incision, so that the proximal end of the fracture is controlled, the reduction is convenient, and the operation risk is reduced;
2. the arc design of the arc fitting part provided by the invention is tightly fitted with the inner side surface of the femoral neck, the radian and the length provide various specifications so as to be suitable for patients with different anatomical characteristics, meanwhile, the part is designed with a locking compression screw hole, a locking screw or a common screw can be used, if the broken end of the fracture needs to be fixed by compression, the common screw is used for compression fixation, and if the broken end of the fracture does not need to be fixed by compression, the locking screw can be used for strengthening the fixation firmness of the internal fixation device and the fracture near end;
3. the shape of the fixing and supporting part provided by the invention is the same as the inner side surface of the proximal femur so as to facilitate the tight attachment of the internal fixing device and the distal fracture end, and a plurality of locking and pressurizing screw holes are arranged, so that common screws and locking screws can be combined to achieve the optimal fixing effect;
4. the arc-shaped attaching part and the fixing and supporting part can be solid bodies or porous structures, the contact area of the device and the bone surface can be reduced through the porous structures, accordingly, damage to periosteum blood circulation is reduced, meanwhile, the elastic modulus of the internal fixing device can be reduced through the porous structures, and stress shielding to bone is reduced.
In conclusion, the invention has the advantages of simple structure, simple and flexible operation and the like, can solve the difficult problem of adduction fracture reduction, reduce the operation time, can provide firm fixation by combining the traditional hollow nail internal fixation, is convenient for the early functional exercise of the postoperative of a patient, and reduces postoperative complications.
The internal fixing device provided by the invention is combined with the traditional hollow screw for fixing, so that the femoral neck fracture is simultaneously fixed by the femoral neck tension side and the femoral neck pressure side, the problem of the shearing force of the fracture part in the traditional operation is effectively solved, the operation time and the recovery time are shortened, and the internal fixing device has good social benefit and economic benefit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a side view of the femoral neck fracture internal fixation device with reduction assistance of the present invention.
Fig. 2 is a front view of the femoral neck fracture internal fixation device for assisting reduction of the invention.
Fig. 3 is a cross-sectional view of the tip of the femoral neck fracture internal fixation device for assisting reduction of the invention.
Fig. 4 is a schematic diagram of an included angle between the tip part and the arc-shaped fitting part of the femoral neck fracture internal fixation device for assisting reduction in accordance with the present invention.
Fig. 5 is a using state diagram of the femoral neck fracture internal fixation device for assisting reduction of the invention.
Fig. 6 is a schematic view of the femoral neck fracture internal fixation device with auxiliary reduction of the invention used with a cannulated screw.
In the figure: 1. an internal fixation device body; 11. a tip portion; 111. a tail end portion; 112. a tip cross section; 113. a head portion; 12. an arc-shaped attaching part; 121. a first locking pressurized threaded hole; 122. a first reinforcing vertical rib; 123. a first reinforcing transverse bar; 124. a first connecting rib; 125. a top end; 13. a fixed support part; 131. a second locking compression threaded hole; 132. a second connecting rib; 133. a second reinforcing transverse bar; 134. a second reinforcing transverse rib'; 135. a second locking pressurized threaded hole'; 136. connecting ribs; 2. femoral head neck junction; 3. conventional cannulated screws.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in figures 1 and 2, the invention provides a femoral neck fracture internal fixation device for assisting reduction, wherein the internal fixation device body 1 at least comprises an arc-shaped joint part 12 matched with the inner side of the femoral neck and used for assisting reduction, a fixed support part 13 used for jointing with the far end of a fracture, and a tip part 11 arranged at the top end of the arc-shaped joint part 12 and used for controlling the rotation of the near end of the fracture, and the three parts are integrated.
The tip part has a non-orthoround cross section structure (as shown in fig. 3, a schematic diagram of a tip part cross section 112 is shown in the figure, which is intended to indicate that the cross section of the tip part is non-orthoround), and is used for being inserted into the femoral head and neck junction part 2.
The cross section of the tip portion 11 changes in a tapered manner from the tail end portion 111 to the head portion 113 thereof (as shown in fig. 2), so that the head portion 113 thereof is easy to penetrate into the femoral head and neck joint portion 2, the cross section of the tip portion 11 closer to the bottom end portion 111 thereof is larger, the mechanical strength of the connection with the arc-shaped attaching surface 12 is higher, the probability of bending and breaking is reduced, and the process of penetrating the whole tip portion into the femoral head and neck joint portion 2 is easier and easier along with the sharpening change of the head portion.
As shown in fig. 4, an angle α between a tangent line of the outer surface of the top end 125 of the arc-shaped fitting portion and a line connecting the head portion 113 of the tip portion to the upper surface of the tail portion 111 is 90 ° to 150 °, and the fixing device can be well fixed and fitted to the inner side of the femoral neck within the angle range.
The arc-shaped joint part 12 is jointed with the arc-shaped bone surface on the inner side of the femoral neck, and a first locking pressurization threaded hole 121 for controlling the proximal end of the fracture is arranged on the arc-shaped joint part. Arc and length of arc laminating portion 12 are the anatomical form structure, design according to the inboard three-dimensional data of human thighbone neck, provide the internal fixation device of various specifications (different radians, different length) arc laminating portion 12, utilize the template before the art to measure the radian and the length of healthy side thighbone neck on the equal proportion X line with the internal fixation device of selecting suitable specification, only arc laminating portion 12 can laminate the just better supplementary of ability with the inboard bone surface of thighbone neck well and reset.
As shown in fig. 2, the first locking compression screw hole 121 is locked and fixed by a locking screw or slid and fixed by a general screw, and an axial direction of the compression screw hole is directed to a skull of a human body.
The fixing and supporting part 13 is attached to the distal end of the fracture and is provided with at least two second locking and pressurizing threaded holes 131 for controlling the distal end of the fracture. The fixing and supporting part 13 is attached to the fracture far end (i.e. the inner side surface of the femur near end) to provide internal fixing devices with different lengths (i.e. different numbers of nail holes), and can be selected according to the stability of the fracture and the crushing degree of the fracture end, if the stability is better and no fracture is crushed, the fixing and supporting part 13 can be selected to have an internal fixing device with 2 nail holes, and if the stability is poorer, the fixing and supporting part 13 can be selected to have an internal fixing device with 3-5 nail holes.
The second locking pressure screw hole 131 is locked and fixed by a locking screw or slid and pressed and fixed by a common screw, and the axial direction of the pressure screw hole points to the foot direction of the human body. The arc-shaped fitting part 12 and the fixing and supporting part 13 are different in the position of the pressurizing part and the locking part of the locking pressurizing screw hole, and the design is beneficial to pressurizing and fixing the fractured end of the fracture.
The arc-shaped fitting part 12 and the fixed supporting part 13 are of a solid structure or a porous structure, the contact area between the device and the bone surface can be reduced due to the porous structure, so that damage to periosteum blood circulation is reduced, meanwhile, the elastic modulus of the internal fixing device can be reduced due to the porous structure, and stress shielding to bone is reduced.
The internal fixing device body 1 is made of titanium alloy or tantalum metal materials, the two materials are common orthopedic materials, the tissue compatibility is good, the elastic fixing performance is realized, the micromotion of a fracture end is allowed, and the fracture healing is facilitated.
The internal fixation device body 1 of the present invention can be used alone (see fig. 5) or in combination with a conventional cannulated screw 3 (see fig. 6), which can be used with 1-3 cannulated screws. The conventional cannulated screws 3, which are typically used 3 times, may be reduced in number in combination with the internal fixation device 1 of the present invention.
Example 1
As shown in fig. 1 to 4, the invention provides a femoral neck fracture internal fixation device for assisting reduction. Mainly comprises a tip part 11, an arc-shaped attaching part 12 and a fixed supporting part 13, wherein the three parts are integrated; in this embodiment, the cross section of the tip 11 is pseudo-heptagon (as shown in fig. 3), i.e. non-circular cross section, which is designed to control the movement of the proximal end of the fracture after being inserted into the proximal end of the fracture (femoral neck joint 2); the arc-shaped fitting part 12 can be tightly fitted with the inner side surface of the femoral neck, the invention provides an internal fixing device of the arc-shaped fitting part 12 with various specifications (different radians and different lengths), and a template is used for measuring the radian and the length of the femoral neck on the healthy side on an equal proportion X-ray before an operation so as to select the internal fixing device body 1 with the proper specification; the arc-shaped attaching part 12 is provided with a first locking pressurizing threaded hole 121, the pressurizing part of the hole is positioned at the proximal end, the axis of the hole points to the direction of the head of a human body, and the locking part of the hole is positioned at the distal end; the fixing and supporting part 13 is attached to the fracture far end (i.e. the inner side surface of the femur near end) to provide internal fixing devices with different lengths (i.e. different numbers of nail holes), and can be selected according to the stability of the fracture and the crushing degree of the fracture broken end, if the fracture with better stability and no crushing is generated, the fixing and supporting part 13 can be selected to have an internal fixing device with 2 nail holes, i.e. a second locking and pressurizing threaded hole 131 and a second locking and pressurizing threaded hole' 135, the pressurizing part of the holes is positioned at the far end, the axis points to the direction of the feet of the human body, and the locking part of the holes is positioned at the near end.
This device adopts the porous structure setting, and porous structure can reduce the area of contact of device and bone face to reduce the destruction to periosteum blood circulation, porous structure can reduce internal fixation device's modulus of elasticity simultaneously, reduces the stress to the sclerotin and shelters from.
Due to the adoption of the design of a porous structure, in order to strengthen the stability of the structure, the upper, lower, left and right sides of the first locking pressurization threaded hole 121 and the edge of the inner fixing device body 1 are provided with a first strengthening vertical rib 122, a first strengthening transverse rib 123 and a first connecting rib 124 connected with the second locking pressurization threaded hole 131, second connecting ribs 132 are arranged between the second locking pressurization threaded hole 131 and the second locking pressurization threaded hole '135 and at the upper, lower, left and right positions, and the second strengthening transverse rib 133, the second strengthening transverse rib' 134 and the connecting rib 136 ensure that reinforcing rib mechanisms are arranged between the holes and between the hole and the edge.
The positions of the pressurizing part and the locking part of the locking and pressurizing dual-purpose screw hole of the arc-shaped attaching part 12 and the fixing and supporting part 13 are different, and the design is beneficial to pressurizing and fixing the fractured end of the fracture.
The radian and the length of the arc-shaped fitting part 12 are of an anatomical structure, and are designed according to three-dimensional data on the inner side of the neck of the femur of a human body, so that internal fixing devices of various specifications are provided, and selection in practical application is based on preoperative X-rays on a healthy side. Only the arc-shaped fitting part 12 can be well fitted with the inner bone surface of the femoral neck, and the reduction can be better assisted.
As shown in fig. 6, when the internal fixation device body 1 of the present invention is used, the tip portion 11 is inserted into the femoral neck joint portion 2, and then the arc-shaped fitting portion 12 is fitted to the inner side surface of the femoral neck to primarily fix the internal fixation device body 1 to the proximal end of the fractured bone, and then the first locking pressurization threaded hole 121 is matched with the second locking pressurization threaded hole 131 and the second locking pressurization threaded hole' 135, so as to further pressurize, fix and lock the internal fixation device body 1 by locking and pressurization, and further fix the internal fixation device body by matching with the conventional cannulated screw 3.
The invention has the advantages of simple structure, simple and flexible operation and the like, can solve the difficult problem of adduction fracture reduction, reduce the operation time and reduce the pain of patients, can provide firm fixation by combining the traditional hollow screw internal fixation, is convenient for the early functional exercise of the patients after the operation, and reduces the postoperative complications.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a supplementary thighbone neck fracture internal fixation device who resets, internal fixation device is used for adduction type thighbone neck fracture to reset, the internal fixation device body have at least with thighbone neck inboard looks adaptation, be used for supplementary arc laminating portion that resets and be used for the fixed stay portion of laminating mutually with the distal end of fracture, a serial communication port, the internal fixation device body is still including setting up the tip portion that is used for controlling the proximal end rotation of fracture on arc laminating portion top, the cross section of tip portion adopts type heptagon for insert thighbone neck joint portion, the cross section of tip portion is the gradual shrinkage formula from its tail end to the direction of its head and changes, makes its head easily pierce thighbone neck joint portion, the tip portion earlier with thighbone neck joint portion location back, the rethread arc laminating portion closely laminates supplementary the resetting with the medial surface of thighbone neck.
2. The reduction-assisted internal femoral neck fracture fixation device according to claim 1, wherein the angle between the tangent of the outer surface at the top end of the arc fitting part and the connecting line from the head of the tip part to the upper surface of the tail part is 90-150 °.
3. The reduction-assisted internal femoral neck fracture fixation device of claim 1, wherein the arc fitting portion fits against the arc bone surface of the inner side of the femoral neck, and is provided with a first locking and pressurizing threaded hole for controlling the proximal end of the fracture.
4. The reduction-assisted internal femoral neck fracture fixation device according to claim 3, wherein the first locking compression threaded hole is locked and fixed by a locking screw or is fixed by a sliding compression screw, and the axial direction of the compression threaded hole points to the skull direction of the human body.
5. A reduction-assisted internal femoral neck fracture fixation device as in claim 1, wherein the fixation support is attached to the distal end of the fracture and has at least two second locking compression threaded holes for controlling the distal end of the fracture.
6. The reduction-assisted internal femoral neck fracture fixation device according to claim 5, wherein the second locking compression threaded hole is locked and fixed by a locking screw or is slide-fixed by a common screw, and the axial direction of the compression threaded hole points to the foot direction of the human body.
7. The reduction-assisted internal fixation device for femoral neck fractures according to claim 1, characterized in that the arc fitting part and the fixation support part are of a solid structure or a porous structure.
8. A reduction-assisted internal femoral neck fracture fixation device as in claim 1, wherein the internal fixation device is made of a titanium alloy or tantalum metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910877976.XA CN110478024B (en) | 2019-09-17 | 2019-09-17 | Auxiliary reduction internal fixing device for femoral neck fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910877976.XA CN110478024B (en) | 2019-09-17 | 2019-09-17 | Auxiliary reduction internal fixing device for femoral neck fracture |
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| Publication Number | Publication Date |
|---|---|
| CN110478024A CN110478024A (en) | 2019-11-22 |
| CN110478024B true CN110478024B (en) | 2021-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910877976.XA Active CN110478024B (en) | 2019-09-17 | 2019-09-17 | Auxiliary reduction internal fixing device for femoral neck fracture |
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| CN113317860B (en) * | 2021-06-22 | 2023-03-14 | 深圳市艾科赛龙科技股份有限公司 | Prosthesis fixing structure for mandible restoration and three-dimensional model design method |
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| CN102753110A (en) * | 2010-02-25 | 2012-10-24 | 新特斯有限责任公司 | Bone plate screw holes convertible to hooks |
| CN204618367U (en) * | 2015-04-30 | 2015-09-09 | 张荣峰 | Femoral lesser trochanter reductor |
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