CN113476130A - Fuse bone nail - Google Patents
Fuse bone nail Download PDFInfo
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- CN113476130A CN113476130A CN202110843424.4A CN202110843424A CN113476130A CN 113476130 A CN113476130 A CN 113476130A CN 202110843424 A CN202110843424 A CN 202110843424A CN 113476130 A CN113476130 A CN 113476130A
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- bone nail
- fusion
- fusion bone
- elastic clamping
- socket
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 92
- 230000004927 fusion Effects 0.000 claims abstract description 83
- 210000001872 metatarsal bone Anatomy 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 210000001137 tarsal bone Anatomy 0.000 description 7
- 238000002513 implantation Methods 0.000 description 6
- 208000010392 Bone Fractures Diseases 0.000 description 5
- 208000027418 Wounds and injury Diseases 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 239000007943 implant Substances 0.000 description 3
- 210000002683 foot Anatomy 0.000 description 2
- 230000003116 impacting effect Effects 0.000 description 2
- 208000027205 Congenital disease Diseases 0.000 description 1
- 206010024453 Ligament sprain Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 208000035965 Postoperative Complications Diseases 0.000 description 1
- 208000010040 Sprains and Strains Diseases 0.000 description 1
- 241000469816 Varus Species 0.000 description 1
- 210000001142 back Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000008407 joint function Effects 0.000 description 1
- 210000003789 metatarsus Anatomy 0.000 description 1
- 238000002324 minimally invasive surgery Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- 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
- A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention provides a fusion bone nail which is divided into a threaded part and a clamping part along the length direction, wherein at least two clamping structures are arranged on the clamping part along the length direction of the fusion bone nail, each clamping structure comprises at least two elastic clamping strips arranged along the circumferential direction of the fusion bone nail, and the elastic clamping strips of the adjacent clamping structures are arranged in a staggered manner in the length direction of the fusion bone nail. According to the invention, the plurality of clamping structures are arranged, the elastic clamping strips in the clamping structures are arranged in a staggered manner, and the fusion bone nail is fixed by the plurality of clamping structures, so that the holding force of the fusion bone nail is improved, the stability of the fusion bone nail is improved, and the fusion bone nail has the characteristics of simple structure, strong practicability, high holding force and the like.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a fusion bone nail.
Background
Metatarsal bone fracture is caused by hitting the dorsum of foot with heavy objects, rolling and sprain of foot varus or various deformities of metatarsal bone due to tumor and congenital diseases, which damages metatarsal bone and adjacent joints and affects joint function. At present, artificial joint prosthesis implantation or conservative treatment is mainly performed, the artificial joint prosthesis is expensive, the implantation process is complicated, the operation process is complicated, the requirement on doctors for operation is high, and the treatment effect is not obvious.
At present, in the metatarsal fusion nail sold mainly, the left side and the right side of the head end of the product clamping part body are respectively provided with an elastic clamping strip which plays a role of deforming a movable groove, so that the metatarsal bones and the tarsal bones or the phalanges are integrated to be fused, the operation is simple and stable, the cost is lower, the operation difficulty is reduced, and the wound and the pain of a patient are reduced. However, the elastic clamping strip in the prior art can only be arranged on one horizontal plane, when the elastic clamping strip is inserted into the tarsal bones or the phalanges, the elastic clamping strip is extruded and can only support the inner walls of the two sides of the tarsal bones or the phalanges by the anti-skidding teeth on the side edges, so that the stability after implantation is not strong, the subsequent recovery time of a patient is prolonged, and the postoperative complications are increased; the implant has no guidance, and is easy to fix deviation; in addition, the prior art only has a straight shape with a certain angle between adjacent metatarsals, and a single straight implant needs more grinding treatment on the metatarsals to adapt to the shape of the implant.
CN209404855U discloses a metatarsal fusion nail, comprising: the screw-in part is used for being screwed into the diseased metatarsus, and a spiral groove and a spiral ridge are arranged on the circumferential direction of the screw-in part body; the clamping portion is used for being clamped into tarsal bones or phalanges, the tail end of the clamping portion is connected with the tail end of the screw-in portion, the left side and the right side of the head end of the clamping portion body are respectively provided with an elastic clamping strip, the left side face and the right side face of the clamping portion body are respectively provided with a deformation movable groove, the front side face and the rear side face of the clamping portion body and the elastic clamping strips are respectively provided with first anti-skidding teeth, and the left side face and the right side face of the elastic clamping strip are respectively provided with second anti-skidding teeth. The utility model discloses a metatarsal fuses nail makes metatarsal and tarsal bone or phalange support to lean on even fusing as an organic whole, and the operation is operated fast portably and reliable, and metatarsal fuses nail low in cost, operation expense low, has reduced doctor's working strength, has shortened the operation time, has also reduced patient's wound and misery.
CN102573682A discloses an intramedullary fixation assembly for bone fusion, comprising: a first member at a first end of the intramedullary fixation assembly, the first member including a head extending along a first longitudinal axis and a first shaft; a second member at a second end of the intramedullary fixation assembly, the second member including a second shaft extending along a second longitudinal axis and a bore extending therethrough along a bore axis, and a third member, wherein the third member is coupled to the second member to compressively couple the first member to the second member and provide an interference fit between the first member and the second member; wherein the second longitudinal axis defines an angle with the bore axis, and wherein each of the first member, the second member, and the third member resides substantially within at least one bone.
The fusion bone nail of prior art all has the structure complicacy, the fixity can be poor and the practicality subalternation problem, consequently, how under the circumstances that the fusion bone nail has simple structure guaranteeing, can also realize that stability is good, helps the stability of the bone healing of patient's earlier stage, becomes the problem that needs to solve at present urgently.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the fusion bone nail, which improves the stability of the clamping part in the implantation process by arranging a plurality of clamping structures and arranging the elastic clamping strips of the adjacent clamping structures in a staggered manner in the length direction of the fusion bone nail, and has the characteristics of simple structure, strong practicability, high holding force and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a fusion bone nail which is divided into a threaded part and a clamping part along the length direction, wherein at least two clamping structures are arranged on the clamping part along the length direction of the fusion bone nail, each clamping structure comprises at least two elastic clamping strips arranged along the circumferential direction of the fusion bone nail, and the elastic clamping strips of the adjacent clamping structures are arranged in a staggered manner in the length direction of the fusion bone nail.
According to the invention, the plurality of clamping structures are arranged, the elastic clamping strips in the clamping structures are arranged in a staggered manner, and the fusion bone nail is fixed by the plurality of clamping structures, so that the holding force of the fusion bone nail is improved, the stability of the fusion bone nail is improved, and the fusion bone nail has the characteristics of simple structure, strong practicability, high holding force and the like.
In a preferred embodiment of the present invention, in the fusion bone screw, an angle between an axial direction of the screw portion and an axial direction of the engaging portion is 170 ° to 180 °, for example, 170 °, 171 °, 172 °, 173 °, 174 °, 175 °, 176 °, 177 °, 178 °, 179 °, or 180 °, but is not limited to the above-mentioned numerical values, and other numerical values not mentioned in the numerical value range are also applicable.
According to the invention, the included angle between the axial direction of the thread part and the axial direction of the clamping part is controlled to be 170-180 degrees, when the angle of the fracture of a patient is larger, the wound area of the fusion nail of the straight nail is increased in the operation process, the fusion effect is not obvious, the use of the fusion nail with the deflection angle is more in line with the physiological curvature of the fracture, and the effect of functional recovery after recovery of the patient is better.
As a preferable technical scheme, an included angle is formed between the elastic clamping strip and the fusion bone nail.
Preferably, the included angle between the elastic clip strip and the fusion bone nail is 30-60 °, such as 32 °, 34 °, 36 °, 38 °, 40 °, 42 °, 44 °, 46 °, 48 °, 50 °, 52 °, 54 °, 56 °, 58 ° or 60 °, but not limited to the listed values, and other values not listed in the numerical range are also applicable.
As a preferred technical solution of the present invention, an included angle between the elastic clamping strip and the fusion bone nail is gradually reduced along a direction from the threaded portion to the engaging portion.
As a preferred technical solution of the present invention, the elastic clamping strips in the clamping structure are symmetrically arranged.
As a preferable technical scheme of the invention, the clamping structure comprises two elastic clamping strips which are symmetrically arranged, and the elastic clamping strips in the adjacent clamping structures form a cross shape.
According to the invention, two elastic clamping strips which are arranged in a cross shape are added, and the opening angles of the two symmetrical elastic clamping strips are different, after the bone hammer is used for impacting and implanting, the upper and lower elastic clamping strips form the cross shape to prop against the inner walls of two sides of a tarsal bone or a phalange, and the holding force and the stability are superior to those of the existing linear elastic clamping strips.
As a preferable technical scheme of the invention, the fusion bone nail is provided with a hollow hole along the length direction in a penetrating way.
The invention can position the Kirschner wire through the hollow hole by arranging the hollow hole, and can complete minimally invasive surgery without adding new wound.
Preferably, the diameter of the hollow bore is 0.9 to 2.6mm, such as 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm or 2.6mm, but is not limited to the recited values, and other values not recited in this range of values are equally applicable.
As a preferable technical scheme of the invention, a first anti-slip tooth is arranged on the surface of one side, far away from the fusion bone nail, of the elastic clamping strip.
Preferably, the fusion bone nail on which the clamping part is arranged is provided with a second anti-slip tooth.
As a preferable technical solution of the present invention, the screw portion and the engaging portion of the fusion bone nail are split structures, the screw portion and the engaging portion are connected and fixed by an angle adjusting structure, and the angle adjusting structure is used for adjusting an included angle between the screw portion and the engaging portion.
The angle adjusting structure is arranged to adjust the included angle between the clamping part and the threaded part, so that the angle adjusting structure is suitable for different use scenes, and the implantation efficiency is improved.
As a preferred technical solution of the present invention, the angle adjusting structure includes a ball socket fixed to the engaging portion, the ball head portion of the threaded portion is disposed in the ball socket, the outer wall of the ball socket is provided with threads, the angle adjusting structure further includes a fixing sleeve sleeved on the outer wall of the ball socket, the inner wall of the fixing sleeve is provided with threads matched with the ball socket, the ball head portion of the threaded portion rotates within the ball socket to adjust an angle, the fixing sleeve is screwed, the ball head portion of the threaded portion compresses the inner wall of the ball socket, and an included angle between the engaging portion and the threaded portion is fixed.
Preferably, the ball socket has at least two petal-shaped structures.
Illustratively, a method for adjusting and fixing the fusion bone nail is provided, which specifically comprises the following steps:
the ball head part of the thread part is rotated, an included angle between the clamping part and the thread part is adjusted, after a proper included angle is formed between the clamping part and the thread part, the fixing sleeve is screwed, and the ball head part of the thread part is enabled to compress the inner wall of the ball head seat, so that fixing is realized.
In use, the fusion bone screw according to the present invention is used to connect two bones by implanting the engaging portion and the threaded portion into the bones of a patient.
The recitation of numerical ranges herein includes not only the above-recited numerical values, but also any numerical values between non-recited numerical ranges, and is not intended to be exhaustive or to limit the invention to the precise numerical values encompassed within the range for brevity and clarity.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the plurality of clamping structures are arranged, the elastic clamping strips in the clamping structures are arranged in a staggered manner, and the fusion bone nail is fixed by the plurality of clamping structures, so that the holding force of the fusion bone nail is improved, the stability of the fusion bone nail is improved, and the fusion bone nail has the characteristics of simple structure, strong practicability, high holding force and the like.
Drawings
FIG. 1 is a schematic structural view of a fusion bone pin provided in example 1 of the present invention;
FIG. 2 is a cross-sectional view of a fusion bone pin provided in example 1 of the present invention;
fig. 3 is a schematic structural view of the fusion bone screw according to embodiment 2 of the present invention, wherein α represents an angle between an axial direction of the threaded portion and an axial direction of the engaging portion;
fig. 4 is a schematic structural view of the fusion bone screw according to embodiment 3 of the present invention, wherein α represents an angle between an axial direction of the threaded portion and an axial direction of the engaging portion;
fig. 5 is a schematic structural view of a ball socket of a fusion bone screw provided in embodiment 3 of the present invention.
Wherein, 1-a clamping part; 2-a threaded portion; 3-elastic clamping strips; 4-a hollow hole; 5-an angle adjustment structure; 6-ball seat.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and 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 taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical solution of the present invention is further explained by the following embodiments.
Example 1
This embodiment provides a fuse bone nail, as shown in fig. 1, fuse bone nail divide into screw thread portion 2 and block portion 1 along length direction, and block portion 1 is gone up and is provided with two block structures along the length direction that fuses the bone nail, is first block structure and second block structure respectively to the direction of block portion 1 by screw thread portion 2, all includes the elasticity card strip 3 that two symmetries set up in the block structure, and elasticity card strip 3 constitutes the cross among the adjacent block structure, and elasticity card strip 3 sets up along the circumference that fuses the bone nail among the block structure. The axial direction of the threaded portion 2 makes an angle of 180 ° with the axial direction of the engaging portion 1.
In the first clamping structure, the included angle between the elastic clamping strip 3 and the fusion bone nail is 45 degrees; in the second clamping structure, the included angle between the elastic clamping strip 3 and the fusion bone nail is 30 degrees.
Further, as shown in fig. 2, a hollow hole 4 is formed through the fusion bone nail along the length direction, and the diameter of the hollow hole 4 is 1.8 mm.
Furthermore, a first anti-skid tooth (not marked in the figure) is arranged on the surface of one side of the elastic clamping strip 3, which is far away from the fusion bone nail; a second anti-skid tooth (not marked in the figure) is arranged on the fusion bone nail where the clamping part 1 is positioned.
Example 2
The present embodiment provides a fusion bone nail, as shown in fig. 3, based on the fusion bone nail described in embodiment 1, which is different in that, for example, an included angle between the axial direction of the threaded portion 2 and the axial direction of the engaging portion 1 is 170 °, that is, α is 170 °; in the first clamping structure, the included angle between the elastic clamping strip 3 and the fusion bone nail is 60 degrees; in the second clamping structure, the included angle between the elastic clamping strip 3 and the fusion bone nail is 40 degrees; the diameter of the hollow bore 4 is 0.9 mm.
Example 3
The present embodiment provides a fusion bone nail, as shown in fig. 4, based on the fusion bone nail described in embodiment 1, which is different in that the screw portion 2 and the engaging portion 1 in the fusion bone nail are of a split structure, the screw portion 2 and the engaging portion 1 are connected and fixed by the angle adjusting structure 5, and the angle adjusting structure 5 is used for adjusting the included angle between the screw portion 2 and the engaging portion 1. In the first clamping structure, the included angle between the elastic clamping strip 3 and the fusion bone nail is 45 degrees; in the second clamping structure, the included angle between the elastic clamping strip 3 and the fusion bone nail is 30 degrees; the diameter of the hollow bore 4 is 2.6 mm.
Further, the angle adjusting structure 5 includes a ball socket 6 fixed to the engaging portion 1, the ball head of the threaded portion 2 is disposed in the ball socket 6, and as shown in fig. 5, the outer wall of the ball socket 6 is provided with threads; the angle adjusting structure 5 further comprises a fixing sleeve sleeved on the outer wall of the ball socket 6, threads matched with the ball socket 6 are arranged on the inner wall of the fixing sleeve, the fixing sleeve is screwed after the ball head part of the threaded part 2 rotates in the ball socket 6 for adjusting the angle, the ball head part of the threaded part 2 tightly presses the inner wall of the ball socket 6, and the included angle between the clamping part 1 and the threaded part 2 is fixed; furthermore, the ball seat 6 has a four-piece structure.
Illustratively, a method for adjusting and fixing the fusion bone nail is provided, which specifically comprises the following steps:
the ball head part of the thread part 2 is rotated, an included angle between the clamping part 1 and the thread part 2 is adjusted, after a proper included angle is formed between the clamping part 1 and the thread part 2, the fixing sleeve is screwed, and the ball head part of the thread part 2 is tightly pressed on the inner wall of the ball head seat 6, so that fixation is realized.
Through the embodiment, (1) the invention adopts the plurality of clamping structures, the elastic clamping strips 3 in the clamping structures are arranged in a staggered manner, and the fusion bone nail is fixed by the plurality of clamping structures, so that the holding force of the fusion bone nail is improved, the stability of the fusion bone nail is improved, and the invention has the characteristics of simple structure, strong practicability, high holding force and the like. Furthermore, by adding two elastic clamping strips 3 which are arranged in a cross shape, and the opening angles of the two symmetrical elastic clamping strips 3 are different, after the bone hammer is used for impacting and implanting, the upper and lower elastic clamping strips 3 form a cross shape to abut against the inner walls of two sides of tarsal bones or phalanges, and the holding force and the stability are superior to those of the existing linear elastic clamping strips 3.
(2) According to the invention, the included angle between the axial direction of the thread part 2 and the axial direction of the clamping part 1 is controlled to be 170-180 degrees, when the angle of the fracture of a patient is larger, the wound area of the fusion nail of the straight nail is increased in the operation process, the fusion effect is not obvious, the use of the fusion nail with the deflection angle is more in line with the physiological curvature of the fracture, and the effect of functional recovery after recovery of the patient is better.
(3) According to the invention, the hollow hole 4 is arranged, so that the Kirschner wire can be positioned through the hollow hole 4, and the minimally invasive operation can be completed without adding new trauma.
(4) The angle adjusting structure 5 is arranged to adjust the included angle between the clamping part 1 and the threaded part 2, so that the angle adjusting structure is suitable for different use scenes, and the implantation efficiency is improved.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The utility model provides a fuse bone nail, its characterized in that, fuse bone nail divide into screw thread portion and block portion along length direction, block portion goes up to be provided with two at least block structures along the length direction who fuses bone nail, the block structure includes the edge two at least elasticity card strips that fuse bone nail's circumferential direction set up are adjacent the elasticity card strip of block structure sets up in the length direction who fuses bone nail crisscross.
2. The fusion bone nail of claim 1, wherein an angle between an axial direction of the threaded portion and an axial direction of the engaging portion is 170 ° to 180 °.
3. The fusion bone nail according to claim 1 or 2, wherein the elastic clamping strip and the fusion bone nail form an included angle therebetween;
preferably, the included angle between the elastic clamping strip and the fusion bone nail is 30-60 degrees.
4. The fusion bone nail according to any one of claims 1 to 3, wherein an included angle between the elastic clamping strip and the fusion bone nail is gradually reduced along a direction from the threaded portion to the clamping portion.
5. The fusion bone screw of any one of claims 1-4, wherein the resilient snap strips in the snap-fit arrangement are symmetrically arranged.
6. The fusion bone nail according to any one of claims 1 to 5, wherein the engaging structure comprises two elastic clamping strips which are symmetrically arranged, and the elastic clamping strips in the adjacent engaging structures form a cross shape.
7. The fusion bone nail according to any one of claims 1 to 6, wherein a hollow hole is formed through the fusion bone nail along a length direction;
preferably, the diameter of the hollow hole is 0.9-2.6 mm.
8. The fusion bone nail according to any one of claims 1 to 7, wherein a first anti-slip tooth is provided on a surface of the elastic clamping strip on a side away from the fusion bone nail;
preferably, the fusion bone nail on which the clamping part is arranged is provided with a second anti-slip tooth.
9. The fusion bone nail according to any one of claims 1 to 8, wherein the threaded portion and the engaging portion of the fusion bone nail are of a split structure, the threaded portion and the engaging portion are fixedly connected by an angle adjusting structure, and the angle adjusting structure is used for adjusting an included angle between the threaded portion and the engaging portion.
10. The fusion bone nail according to claim 9, wherein the angle adjusting structure comprises a socket fixed to the engaging portion, the head of the threaded portion is disposed in the socket, the outer wall of the socket is provided with threads, the angle adjusting structure further comprises a fixing sleeve sleeved on the outer wall of the socket, the inner wall of the fixing sleeve is provided with threads matching with the socket, the head of the threaded portion rotates within the socket to adjust an angle, the fixing sleeve is screwed, the head of the threaded portion presses the inner wall of the socket, and an included angle between the engaging portion and the threaded portion is fixed;
preferably, the ball socket has at least two petal-shaped structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110843424.4A CN113476130A (en) | 2021-07-26 | 2021-07-26 | Fuse bone nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110843424.4A CN113476130A (en) | 2021-07-26 | 2021-07-26 | Fuse bone nail |
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| CN113476130A true CN113476130A (en) | 2021-10-08 |
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|---|---|---|---|
| CN202110843424.4A Pending CN113476130A (en) | 2021-07-26 | 2021-07-26 | Fuse bone nail |
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| CN108392258A (en) * | 2018-04-16 | 2018-08-14 | 魏大平 | A kind of anti-loosening nail applied to bone surgery |
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2021
- 2021-07-26 CN CN202110843424.4A patent/CN113476130A/en active Pending
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| US20150142066A1 (en) * | 2013-11-19 | 2015-05-21 | Wright Medical Technology, Inc. | Two-wire technique for installing hammertoe implant |
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Application publication date: 20211008 |