CN116672056A - Orthopedic belt wire screw assembly and guide - Google Patents
Orthopedic belt wire screw assembly and guide Download PDFInfo
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- CN116672056A CN116672056A CN202310592405.8A CN202310592405A CN116672056A CN 116672056 A CN116672056 A CN 116672056A CN 202310592405 A CN202310592405 A CN 202310592405A CN 116672056 A CN116672056 A CN 116672056A
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- 230000000399 orthopedic effect Effects 0.000 title claims abstract description 24
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 89
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 76
- 230000000149 penetrating effect Effects 0.000 claims abstract description 12
- 210000001519 tissue Anatomy 0.000 claims abstract description 11
- 230000036760 body temperature Effects 0.000 claims description 4
- 230000035515 penetration Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 206010023204 Joint dislocation Diseases 0.000 abstract description 12
- 208000001132 Osteoporosis Diseases 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 8
- 210000003041 ligament Anatomy 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 210000002435 tendon Anatomy 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 210000003906 tibiofibular joint Anatomy 0.000 description 3
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 208000034693 Laceration Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008468 bone growth Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
Classifications
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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
-
- 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
- A61B17/82—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin for bone cerclage
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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
- A61B17/866—Material or manufacture
-
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00831—Material properties
- A61B2017/00867—Material properties shape memory effect
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Landscapes
- 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 application discloses an orthopedic belt line screw assembly and a guide piece, relates to the field of medical equipment, and can solve the problems that in the prior art, the holding force of a clinically used screw is insufficient and the screw is easy to pull out or cut out; and has the advantage of less damage, and is particularly suitable for fixing the osteoporosis part and the joint dislocation. The orthopedic belt line screw assembly comprises a memory alloy screw and a hand piece detachably connected to one end of the memory alloy screw, the memory alloy screw comprises a main body, a plurality of nail petals integrally connected to one end of the main body far away from the hand piece and a suture connected to the main body and used for being sutured on human tissues, the memory alloy screw is provided with a first state and a second state, when in the first state, the nail petals are deformed and are stuck together to form a tip convenient for penetrating into a bone canal, when in the second state, the nail petals are deformed so that one ends of the nail petals far away from the main body are far away from each other, and the outer diameter of the main body from one end close to the suture to one end close to the nail petals is gradually reduced.
Description
Technical Field
The application relates to the field of medical instruments, in particular to an orthopedic belt line screw assembly and a guide piece.
Background
Ligament tearing and tendon stopping avulsion and joint dislocation of the osteoporosis part are common diseases of orthopaedics, one of the methods for treating the diseases of ligament tearing and tendon stopping avulsion and joint dislocation of the osteoporosis part in the orthopaedics operation is to drive screw nails into bone tracts, the screw nails can help bones or joints to restore to original positions through the fixing effect of the screw nails, the healing process is accelerated, the screw nails are tightly combined with bones through extruding the bones, the fixation is completed, and the suture line is completed to fix the tendon stopping or elastically fix the joint, so that the effects of treating the ligament tearing and the tendon stopping avulsion and the joint dislocation of the osteoporosis part are achieved. In addition, the existing screw nail has higher strength and corrosion resistance, can bear the load of a human body and the influence of external environment well, and ensures the operation effect.
However, the sliding or falling-out of the screw in the bone is a common problem, which is mainly caused by the fact that the contact surface between the screw and the bone is too small and the friction force is insufficient, and the existing screw is pulled out and cannot be fixed due to the reduction of bone mass at the osteoporosis part. If the nail is not sufficiently secured, the nail may move and even fall out of the bone canal during weight loading or movement of the human body, resulting in poor therapeutic results. For the fixation of dislocation of joints, such as distal ulna-radius joint and lower tibiofibular joint, the existing elastic fixation mostly uses a loop steel plate, and the fixation mode has larger bone path, and needs at least two incisions to complete fixation, so that the damage is larger.
Disclosure of Invention
Therefore, the application provides an orthopedic belt line screw assembly and a guide piece, which are used for solving the problems that in the prior art, a screw nail is not firmly fixed in bone and a suture is prevented from being sutured in place.
In order to achieve the above object, the present application provides the following technical solutions:
an orthopedic band wire screw assembly comprising a memory alloy screw and a hand piece detachably connected to one end of the memory alloy screw, the memory alloy screw comprising a main body, a plurality of petals integrally connected to one end of the main body away from the hand piece, and a suture connected to one end of the main body away from the petals and used for suturing human tissue, the memory alloy screw having a first state in which the petals are deformed and abutted together to form a tip for facilitating penetration into a bone canal, and a second state in which the petals are deformed to separate the petals from one another at one end of the main body; when the ambient temperature of the memory alloy screw is lower than the set low temperature, the memory alloy screw is in a first state, and when the ambient temperature of the memory alloy screw is in a human body temperature range, the memory alloy screw is in a second state; the body tapers in outer diameter from an end proximal to the suture to an end proximal to the staple flap.
Preferably, the peripheral wall of the memory alloy screw is integrally formed with a plurality of barbs for limiting the sliding of the memory alloy screw from the bone canal and the bone mass so as to increase the friction force between the memory alloy screw and the bone canal.
Preferably, the petals are two, three or four.
Preferably, the set low temperature is zero degrees.
Preferably, the hand piece is provided with a mounting hole penetrating through the hand piece along the length direction of the hand piece, one end of the memory alloy screw is integrally formed with a connecting piece used for penetrating through the mounting hole, the outer diameter of the memory alloy screw is larger than the aperture of the mounting hole, and the connecting piece is provided with a threading hole used for penetrating through the suture line.
Preferably, the connecting piece is a polygon prism, and a plurality of limit surfaces matched with the side surfaces of the polygon prism are formed on the hole wall of the mounting hole.
Preferably, the threading hole penetrates through two opposite side surfaces of the polygon prism, two abdicating grooves communicated with the mounting hole are formed in the end surface, away from the main body, of the polygon prism, the abdicating grooves are communicated to the side surfaces of the polygon prism, and the two abdicating grooves and the two openings of the threading hole are in one-to-one correspondence.
Preferably, the handpiece is a cylinder and the outer diameter of the end of the cylinder remote from the memory alloy screw is greater than the outer diameter of the end near the memory alloy screw.
Preferably, the end of the nail flap remote from the body is formed with a flat surface for abutment against the bone surface.
The application also discloses a guide piece, wherein the guide piece is provided with a guide through hole, one end of the guide through hole is used for being abutted against a bone canal and communicated with the bone canal, and the other end of the guide through hole is provided with a horn mouth which is convenient for a memory alloy screw and a hand piece to penetrate into the guide through hole.
The application has the following advantages:
when the ambient temperature of the memory alloy screw is lower than the set low temperature, the memory alloy screw is in a first state, the plurality of nail petals are retracted and abutted together, so that the memory alloy screw can be conveniently stored, the memory alloy screw is taken out from the set low-temperature storage state and then is arranged at one end of the hand piece, a doctor holds the hand piece, the memory alloy screw is penetrated into a bone canal, the plurality of nail petals penetrate out of the bone canal, the plurality of nail petals are positioned at the other side of the bone, the plurality of nail petals are gradually opened in the environment of the body temperature, the one end of the nail petals far away from the main body is abutted against the bone, the main body is positioned in the bone canal, then the hand piece is taken down from the memory alloy screw, a suture connected to the memory alloy screw is sutured on a human tissue, the plurality of nail petals are hooked at one side of the bone, and the suture is sutured at the other side of the bone, so that the main body is firmly fixed in the bone canal, and the problem that in the prior art, the screw thread nail slides due to low density of the bone in the operation process can be avoided; the inner diameter of the bone canal is smaller, so that minimally invasive treatment is realized for the patient with joint dislocation of the special part of the distal ulna-radius joint dislocation and the joint dislocation of the lower tibiofibular joint. The outer diameter of the main body gradually decreases from one end close to the suture to one end close to the nail flap, so that one end of the main body close to the suture can also prevent the main body from falling out of the bone canal towards the direction of the nail flap, and the condition that the suture is not sutured in place is prevented.
Drawings
In order to more intuitively illustrate the prior art and the application, several exemplary drawings are presented below. It should be understood that the specific shape and configuration shown in the drawings are not generally considered limiting conditions in carrying out the application; for example, those skilled in the art will be able to make routine adjustments or further optimizations for the addition/subtraction/attribution division, specific shapes, positional relationships, connection modes, dimensional proportion relationships, and the like of certain units (components) based on the technical concepts and the exemplary drawings disclosed in the present application.
FIG. 1 is a schematic view of an orthopedic belt screw assembly mated with a guide according to an embodiment of the present application;
FIG. 2 is a schematic view of an exploded view of an orthopedic belt line screw assembly according to an embodiment of the present application;
FIG. 3 is a schematic view of a memory alloy screw of an orthopedic belt screw assembly according to an embodiment of the present application;
FIG. 4 is a schematic view of an open state of a nail flap of an orthopedic belt line screw assembly according to an embodiment of the present application;
FIG. 5 is a schematic view of a guide member according to an embodiment of the present application;
FIG. 6 is a schematic view of an orthopedic belt screw assembly mated with a guide according to an embodiment of the present application;
FIG. 7 is a schematic view of a first surgical condition of an orthopedic belt screw assembly according to an embodiment of the present application;
fig. 8 is a schematic view of a second surgical state of an orthopedic belt screw assembly according to an embodiment of the present application.
Reference numerals illustrate:
1. a memory alloy screw; 11. a main body; 12. nailing the petals; 13. a connecting piece; 131. a threading hole; 132. a relief groove; 2. a hand piece; 3. a suture; 4. a guide; 41. a guide through hole; 42. a horn mouth; 5. a bone; 51. bone canal.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
In the description of the present application: the terms "inner", "outer" refer to the inner and outer of the respective component profiles; the terms "first," "second," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements but may include other steps or elements not expressly listed but inherent to such process, method, article, or apparatus or adding steps or elements based on a further optimization of the inventive concept.
Referring to fig. 1-4 and 6-8, the present application discloses an orthopedic band screw assembly comprising a memory alloy screw 1 and a handpiece 2 detachably connected to one end of the memory alloy screw 1, the memory alloy screw 1 comprising a main body 11, a plurality of petals 12 integrally connected to one end of the main body 11 remote from the handpiece 2, and a suture 3 connected to one end of the main body 11 remote from the petals 12 for suturing to human tissue, the memory alloy screw 1 having a first state in which the petals 12 are deformed and abutted together to form a tip for facilitating penetration of a bone tunnel 51, and a second state in which the petals 12 are deformed to move one end of the petals 12 remote from the main body 11 away from each other; when the ambient temperature of the memory alloy screw 1 is lower than the set low temperature, the memory alloy screw 1 is in a first state, and when the ambient temperature of the memory alloy screw 1 is in the temperature range of a human body (generally 36-37.5 ℃), the memory alloy screw 1 is in a second state; the outer diameter of the body 11 decreases from the end near the suture 3 to the end near the flap 12, and the taper of the body 11 from the end near the suture 3 to the end near the flap 12 is 2-6.
When the ambient temperature of the memory alloy screw 1 is lower than the set low temperature, the memory alloy screw 1 is in a first state, the plurality of nail petals 12 are retracted and abutted together, so that the memory alloy screw 1 can be conveniently stored, the memory alloy screw 1 is taken out of the storage state of the set low temperature and then is arranged at one end of the hand piece 2, a doctor holds the hand piece 2, the memory alloy screw 1 is penetrated into the bone canal 51, the plurality of nail petals 12 penetrate out of the bone canal 51, the plurality of nail petals 12 are positioned at the other side of the bone 5, the plurality of nail petals 12 are gradually opened in the environment of the body temperature of a human body, the end of the nail petals 12 far away from the main body 11 is abutted against the bone 5, at the moment, the main body 11 is positioned in the bone canal 51, then, the hand piece 2 is taken off from the memory alloy screw 1, the suture 3 connected to the memory alloy screw 1 is sutured on the human tissue, the plurality of nail petals 12 are hooked at one side of the bone 5, and the suture 3 is sutured at the other side of the bone 5, so that the main body 11 is firmly fixed in the bone canal 51, the problem of loosening screw 1 caused in the prior art can be avoided, and the screw thread density of the bone 5 is low in the process of the patient is caused; the inner diameter of the bone canal 51 is relatively small, so that minimally invasive treatment is realized for a patient with joint dislocation at a specific part of the distal ulnar joint dislocation, the joint dislocation of the lower tibiofibular joint. Wherein the outer diameter of the main body 11 gradually decreases from the end close to the suture 3 to the end close to the nail flap 12, so that the end of the main body 11 close to the suture 3 can prevent the main body 11 from being pulled out of the bone canal 51 towards the nail flap 12, thereby preventing the suture 3 from being not sutured in place.
It should be further noted that, in the process of taking out the memory alloy screw 1 from the state of setting low temperature and gradually penetrating into the bone canal 51, the temperature of the memory alloy screw 1 gradually increases until the temperature reaches the temperature range of the human body, and the nail flap 12 opens; the memory alloy screw 1 is of a solid structure, and thus has a high strength.
The shape change characteristic of the memory alloy along with temperature is the prior art, and the memory alloy is used in human body; bone tunnel 51 refers to a perforated tube in bone 5 that may be used to introduce external surgical instruments or prosthetic materials into bone 5 for surgery or to repair bone 5 tissue.
The outer peripheral wall of the memory alloy screw 1 is integrally formed with a plurality of barbs for restricting the sliding out of the memory alloy screw 1 from the bone tunnel 51. The barbs are similar to the barbs on a fish hook in that the direction of the barbs' thorns are oriented toward the suture 3. The barbs increase the friction force between the memory alloy screw 1 and the bone, so that the surface of the memory alloy screw 1 is roughened, the friction force between the memory alloy screw 1 and the bone can be increased, and the bone is beneficial to the later bone growth.
In some other embodiments, the end of the petals 12 remote from the main body 11 is formed with a flat surface that, in the second state, deforms the petals 12 against the bone surface, which increases the contact area of the petals 12 with the bone, facilitating the multiple petals 12 to support and secure the main body 11.
In clinical application, the ligament dead center of the osteoporosis part is treated to be torn, and the memory alloy screw 1 is operated according to the operation mode; when the joint dislocation is treated, bone passages 51 are required to be punched on two adjacent bones 5, the hand piece 2 and the memory alloy screw 1 are connected together, the memory alloy screw 1 and the hand piece 2 are penetrated into the other bone passage 51 from one bone passage 51, the memory alloy screw 1 is fixed on one bone 5, the hand piece 2 is taken down, the suture 3 is stitched on the other bone 5, and one of the dislocated bones 5 is supported by the other bone 5 through the cooperation of the hand piece 2 and the memory alloy screw 1.
It should be further explained that the bone canal 51 may heal by itself, and the suture 3 may not be removed from the human body.
The petals 12 are two, three or four. In clinical applications, the two-petal 12 memory alloy screw 1 is used for treating joint dislocation, and the three-petal 12 memory alloy screw 1 is used for treating ligament lacerations at the osteoporosis site.
The low temperature is set to zero degrees. The memory alloy screw 1 is stored in an environment below the set low temperature.
Referring to fig. 1 to 4, the hand piece 2 is provided with a mounting hole penetrating through the hand piece 2 along the length direction of the hand piece, one end of the memory alloy screw 1 is integrally formed with a connecting piece 13 penetrating through the mounting hole, the outer diameter of the memory alloy screw 1 is larger than the aperture of the mounting hole, and the connecting piece 13 is provided with a threading hole 131 for penetrating the suture 3.
The connecting piece 13 is a polygon prism, and the hole wall of the mounting hole is formed with a plurality of limit surfaces matched with the side surfaces of the polygon prism. The limit surface is matched with the polygon prism, so that the memory alloy screw 1 can be limited to rotate when in use, and the heat generated by the rotation of the memory alloy screw 1 and the friction of the inner wall of the bone canal 51 can be prevented, and the influence on the tissues around the bone 5 can be avoided.
The threading hole 131 penetrates through two opposite side surfaces of the polygon prism, two yielding grooves 132 communicated with the mounting holes are formed in the end surface, far away from the main body 11, of the polygon prism, the yielding grooves 132 are communicated with the side surfaces of the polygon prism, and the two yielding grooves 132 correspond to the orifices of the two threading holes 131 one by one. The side of the polygon prism is close to the limit surface, and the abdication groove 132 can provide an abdication space for the suture 3.
The handpiece 2 is a cylinder with an outer diameter at the end of the cylinder remote from the memory alloy screw 1 that is greater than the outer diameter at the end near the memory alloy screw 1. The outer diameter of the end of the hand piece 2 far away from the memory alloy screw 1 is larger, the contact area of the end is larger, and the hand piece can be conveniently gripped by hands or clamped by other medical instruments.
Referring to fig. 1 and 5-6, the present application also discloses a guide member, wherein the guide member 4 is provided with a guide through hole 41, one end of the guide through hole 41 is used for abutting against the bone canal 51 and communicating with the bone canal 51, and the other end of the guide through hole 41 is formed with a horn mouth 42 which is convenient for the memory alloy screw 1 and the hand piece 2 to penetrate into the guide through hole 41. The general skeleton 5 is wrapped with surrounding tissues, which causes the memory alloy screw 1 to be easily blocked by the human tissues before penetrating into the bone tunnel 51, so that the memory alloy screw 1 is damaged to the human tissues, and therefore, the guide 4 is placed at the corresponding skeleton 5 in advance, the guide through hole 41 of the guide 4 is communicated with the bone tunnel 51, and the memory alloy screw 1 and the hand piece 2 are penetrated from the other end of the guide through hole 41 and smoothly penetrated into the bone tunnel 51.
Any combination of the technical features of the above embodiments may be performed (as long as there is no contradiction between the combination of the technical features), and for brevity of description, all of the possible combinations of the technical features of the above embodiments are not described; these examples, which are not explicitly written, should also be considered as being within the scope of the present description.
The application has been described above with particularity and detail in connection with general description and specific embodiments. It should be understood that numerous conventional modifications and further innovations may be made to these specific embodiments, based on the technical concepts of the present application; but these conventional modifications and further innovations may also fall within the scope of the claims of the present application as long as they do not depart from the technical spirit of the present application.
Claims (10)
1. An orthopedic band screw assembly comprising a memory alloy screw and a handpiece removably attached to one end of the memory alloy screw, the memory alloy screw comprising a main body, a plurality of petals integrally attached to one end of the main body distal from the handpiece, and a suture attached to one end of the main body distal from the petals for suturing to human tissue, the memory alloy screw having a first state in which the petals are deformed and held against one another to form a tip for facilitating penetration into a bone canal, and a second state in which the petals are deformed to move one end of the petals distal from the main body away from one another; when the ambient temperature of the memory alloy screw is lower than the set low temperature, the memory alloy screw is in a first state, and when the ambient temperature of the memory alloy screw is in a human body temperature range, the memory alloy screw is in a second state; the body tapers in outer diameter from an end proximal to the suture to an end proximal to the staple flap.
2. The orthopedic belt line screw assembly of claim 1, wherein the peripheral wall of the memory alloy screw is integrally formed with a plurality of barbs for limiting sliding out of the memory alloy screw from the bone tunnel to increase friction between the memory alloy screw and the bone tunnel.
3. The orthopedic belt line screw assembly of claim 1, wherein the petals are two, three or four.
4. The orthopedic belt line screw assembly of claim 1, wherein the set low temperature is zero degrees.
5. The orthopedic belt line screw assembly according to claim 1, characterized in that the hand piece is provided with a mounting hole penetrating through the hand piece along the length direction of the hand piece, one end of the memory alloy screw is integrally formed with a connecting piece penetrating through the mounting hole, the outer diameter of the memory alloy screw is larger than the aperture of the mounting hole, and the connecting piece is provided with a threading hole for penetrating through the suture line.
6. The orthopedic belt line screw assembly of claim 5, wherein the connector is a polygonal column, and the wall of the mounting hole is formed with a plurality of limit surfaces that mate with the sides of the polygonal column.
7. The orthopedic belt line screw assembly of claim 6, wherein the threading hole penetrates through two opposite side surfaces of the polygon prism, two relief grooves communicated with the mounting hole are formed in the end surface of the polygon prism away from the main body, the relief grooves are communicated to the side surfaces of the polygon prism, and the two relief grooves correspond to the openings of the threading holes one by one.
8. The orthopedic belt line screw assembly of claim 1 or 5, wherein the handpiece is a cylinder and an outer diameter of an end of the cylinder distal from the memory alloy screw is greater than an outer diameter of an end proximal to the memory alloy screw.
9. The orthopedic belt line screw assembly of claim 1, wherein an end of the nail flap remote from the body is formed with a flat surface for abutment against a bone surface.
10. The guide piece is characterized in that the guide piece is provided with a guide through hole, one end of the guide through hole is used for propping against a bone canal and communicating with the bone canal, and the other end of the guide through hole is provided with a horn mouth which is convenient for a memory alloy screw and a hand piece to penetrate into the guide through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310592405.8A CN116672056A (en) | 2023-05-24 | 2023-05-24 | Orthopedic belt wire screw assembly and guide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310592405.8A CN116672056A (en) | 2023-05-24 | 2023-05-24 | Orthopedic belt wire screw assembly and guide |
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| CN116672056A true CN116672056A (en) | 2023-09-01 |
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| CN202310592405.8A Pending CN116672056A (en) | 2023-05-24 | 2023-05-24 | Orthopedic belt wire screw assembly and guide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117481722A (en) * | 2023-12-29 | 2024-02-02 | 泓欣科创生物科技(北京)有限公司 | Combined self-locking interface screw and implantation method thereof |
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2023
- 2023-05-24 CN CN202310592405.8A patent/CN116672056A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117481722A (en) * | 2023-12-29 | 2024-02-02 | 泓欣科创生物科技(北京)有限公司 | Combined self-locking interface screw and implantation method thereof |
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