CN114681030A - Posterior cruciate ligament tibia insertion avulsion fracture fixing device and using method - Google Patents
Posterior cruciate ligament tibia insertion avulsion fracture fixing device and using method Download PDFInfo
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- CN114681030A CN114681030A CN202210205070.5A CN202210205070A CN114681030A CN 114681030 A CN114681030 A CN 114681030A CN 202210205070 A CN202210205070 A CN 202210205070A CN 114681030 A CN114681030 A CN 114681030A
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- 210000002303 tibia Anatomy 0.000 title claims abstract description 73
- 210000002967 posterior cruciate ligament Anatomy 0.000 title claims abstract description 35
- 238000003780 insertion Methods 0.000 title claims abstract description 32
- 230000037431 insertion Effects 0.000 title claims abstract description 32
- 208000011708 Avulsion fracture Diseases 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 13
- 206010017076 Fracture Diseases 0.000 claims description 57
- 208000010392 Bone Fractures Diseases 0.000 claims description 56
- 210000000629 knee joint Anatomy 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000001356 surgical procedure Methods 0.000 abstract description 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 5
- 239000010959 steel Substances 0.000 abstract description 5
- 210000000944 nerve tissue Anatomy 0.000 abstract description 3
- 230000002792 vascular Effects 0.000 abstract description 3
- 238000002324 minimally invasive surgery Methods 0.000 abstract 1
- 210000000988 bone and bone Anatomy 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 210000000080 chela (arthropods) Anatomy 0.000 description 3
- 210000001698 popliteal fossa Anatomy 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 210000003127 knee Anatomy 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000399 orthopedic effect Effects 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 208000025978 Athletic injury Diseases 0.000 description 1
- 208000002658 Intra-Articular Fractures Diseases 0.000 description 1
- 206010041738 Sports injury Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 208000037873 arthrodesis Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 210000002414 leg Anatomy 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 239000000725 suspension Substances 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, 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
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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
- A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Medical Informatics (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Veterinary Medicine (AREA)
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- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
The invention relates to a posterior cruciate ligament tibia insertion avulsion fracture fixing device and a use method thereof. Compared with the prior art, the invention omits structures such as a suture, a belt loop steel plate and the like, and realizes more stable rigid fixation through the tightening part and the snap ring skillfully. Most importantly, the whole arthroscopic surgery does not need to establish double tibial channels in a complicated way, the surgical channel does not pass through popliteal vascular nerve tissues, and the minimally invasive arthroscopic surgery has the characteristic of minimally invasive surgery.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a posterior cruciate ligament tibia insertion avulsion fracture fixing device and a using method thereof.
Background
Posterior cruciate ligament tibia insertion avulsion fracture is a special intra-articular fracture which mostly occurs in trauma and sports injury. The fracture is characterized in that the fracture block is pulled by the posterior cruciate ligament to float upwards, so that the posterior cruciate ligament fails, the joint is loosened, and the fracture is not healed. Surgical treatment methods for this type of fracture include open surgical treatment and arthroscopic treatment.
As the popliteal fossa has a plurality of nerve bundles, the open surgery has the problems of difficult exposure, high injury risk, beautiful scar influence and the like. Therefore, a minimally invasive arthroscopic surgical treatment method is generally adopted. The arthroscopic operation treatment needs to use the structures of a fixing screw, a kirschner wire, a cerclage steel wire, a strap steel plate and the like, for example, the chinese patent application CN113208722A discloses a fixing and suspending device for posterior cruciate ligament syndesis fracture reduction operation and an operation method thereof, the operation method can reduce the operation steps of the operation, is simple and easy to implement, only needs to drill a bone tunnel in the middle of the torn bone block, and the reposition, the bone drilling tunnel and the thread passing can be operated and finished on the ACL positioner without performing the operations of suturing, thread passing, knotting and the like on the joint cavity behind the knee, thereby greatly simplifying the operation steps, reducing the operation risk, and when the knee is bent by about 90 degrees, the wire loop on the suspension loop is tightened, and the screw is screwed into the tunnel for fixing, so that the constant pressure of the titanium plate with the loop on the avulsion bone block can be kept in the bending and stretching range of the knee joint, and the fracture healing and the early functional exercise are facilitated.
However, the above method still needs to use objects such as a titanium plate with a loop and a suture which are not easy to control, and the operations such as threading, grasping and bolting the titanium plate with the loop are needed during the operation, and the operations are not easy to be implemented in a narrow space in the knee joint under the arthroscope, so that the operation complexity is increased, and the operation difficulty is improved.
Disclosure of the invention
In view of the above, there is a need for a posterior cruciate ligament tibia insertion avulsion fracture fixation device, which is used to solve the problem that the existing arthroscopic posterior cruciate ligament insertion fracture repair operation needs to use a suture during fixation, which is difficult to operate.
The invention provides a posterior cruciate ligament tibia insertion avulsion fracture fixing device, which comprises:
the guide rod is used for penetrating through the tibia and the fracture block;
the clamping ring is detachably sleeved at one end of the guide rod and is used for abutting against one end, away from the tibia, of the fracture block;
the clamping part is connected to one end of the guide rod in a sliding manner along the radial direction of the guide rod, and when the clamping part slides to be embedded into the guide rod, the clamping part can be used for the clamping ring to slide through; when the clamping part slides to the protruding guide rod, the clamping part is used for limiting the clamping ring to slide in the direction away from the tibia;
the tightening part is detachably connected to the other end of the guide rod along the extension direction of the guide rod and is used for clamping the tibia and the fracture block together with the clamping ring.
Preferably, the clamping portion is inserted in the outer peripheral surface of the guide rod in a sliding manner along the radial direction of the guide rod, the end portion, deviating from the guide rod, of the clamping portion forms a chamfer plane, and the direction of the chamfer plane deviates from the guide rod and the fracture block simultaneously.
Preferably, the clamping portion is cylindrical, the axis of the clamping portion extends along the radial direction of the guide rod, one end of the clamping portion is inserted into the guide rod, and the inclined plane is formed at the other end of the clamping portion.
Preferably, still include the spring, the global of the one end of guide bar is formed with the slot that supplies joint portion to insert, places the slot in the spring, and guide bar and joint portion are connected respectively to the both ends of spring.
Preferably, the number of the clamping parts is at least two, and the at least two clamping parts are arranged on the circumferential surface of the guide rod in an equiangular surrounding manner.
Preferably, a screw thread is formed on the circumferential surface of the other end of the guide rod, the tightening part is a nut, and the tightening part is sleeved on the guide rod and is in threaded connection with the guide rod.
Preferably, the device further comprises a kirschner wire, and the guide rod is provided with a through hole along the axis thereof, through which the kirschner wire passes.
Preferably, the outer peripheral surface of the snap ring is formed by two arc-shaped surfaces and two planes in a surrounding mode, and the two planes are parallel.
Preferably, the clamp also comprises an installation clamp, the installation clamp comprises two foldable clamp arms, and one opposite sides of the two clamp arms are provided with clamping grooves which are respectively used for clamping two planes on the clamping ring so as to clamp the clamping ring.
The invention also provides a using method of the posterior cruciate ligament tibia insertion avulsion fracture fixing device, which comprises the following steps:
and 3, mounting the tightening part at the other end of the guide rod, so that the tightening part and the clamping ring clamp and fix the tibia and the fracture block.
When the device is used, the guide rod simultaneously penetrates through the tibia and the fracture block from the front side of the tibia, the clamping ring is sleeved on the guide rod between the clamping part and the fracture block from a rear access of the knee joint, and the tibia and the fracture block are clamped tightly by the tightening part and the clamping ring through the tightening part, so that the tibia and the fracture block are fixed.
Compared with the prior art, the invention omits structures such as a suture, a belt loop steel plate and the like, and realizes more stable rigid fixation through the tightening part and the snap ring skillfully. Most importantly, the clamping ring only needs to extend into the joint from the rear side of the tibia, and the tightening part can be fixed from the front side with less peripheral tissues of the tibia during the operation, so that the whole arthroscopic operation does not need to establish double tibial channels in a complex way, the operation channel does not pass through popliteal fossa vascular nerve tissues, and the minimally invasive characteristic under the whole arthroscope is achieved.
Drawings
FIG. 1 is a schematic structural view of an embodiment of a posterior cruciate ligament tibial insertion avulsion fracture fixation device provided by the present invention;
FIG. 2 is an exploded view of an embodiment of a posterior cruciate ligament tibial insertion avulsion fracture fixation device provided in accordance with the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
FIG. 4 is a schematic structural view of a clamping portion of an embodiment of a posterior cruciate ligament tibia insertion avulsion fracture fixation device provided by the present invention;
fig. 5 is a schematic structural diagram of an installation clamp in an embodiment of the posterior cruciate ligament tibia insertion avulsion fracture fixation device provided by the invention.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate presently preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit its scope.
Referring to fig. 1 to 5, an embodiment of a posterior cruciate ligament tibia insertion avulsion fracture fixation device provided by the present invention includes a guide rod 1, a snap ring 2, a clamping portion 3, and a tightening portion 4. Wherein guide bar 1 for pass shin bone and fracture piece, the one end of guide bar 1 is located to the 2 movable sleeves of snap ring, is located the fracture piece promptly and deviates from one side of shin bone, and is used for butt fracture piece. Joint portion 3 is connected global in the one end of guide bar 1 to butt snap ring 2 deviates from the terminal surface of fracture piece, and joint portion 3 and 1 swing joint of guide bar are used for making snap ring 2 can cross 3 covers in joint portion from the one end of guide bar 1 and locate guide bar 1. Tightening part 4 is movably connected in the other end of guide bar 1 along the extending direction of guide bar 1, is located the shin bone promptly and deviates from one side of fracture piece to be used for the butt shin bone, its drive joint portion 3 compresses tightly snap ring 2 and accomplishes fixedly on the fracture piece.
When the device is used, the guide rod 1 simultaneously penetrates through the tibia and the fracture block from the front side of the tibia, the clamping ring 2 is sleeved on the guide rod 1 between the clamping part 3 and the fracture block from the rear side access of the knee joint, and the tibia and the fracture block are clamped by the tightening part 4 and the clamping ring 2 through the tightening part 4, so that the tibia and the fracture block are fixed.
It is understood that the tibia in the present invention refers to the tibia body, and the fracture block refers to a portion of the tibia end point of the posterior cruciate ligament, which is disconnected from the tibia body and connected to the posterior cruciate ligament, as in the posterior approach of the knee joint, which are conventional concepts, and will not be described herein too much for the general knowledge in the related art.
The above components will be described in more detail below:
as a preferred embodiment, the guide bar 1 of this embodiment is made of an inert metal material and has a length of 60 mm. The both ends of guide bar 1 are head end and tail end respectively, and behind guide bar 1 passed shin bone and fracture piece, the one side that is located the fracture piece and deviates from the shin bone is the head end, and guide bar 1 deviates from the one end of fracture piece in the text promptly, and the one end that is located the shin bone and deviates from the fracture piece is the tail end, and guide bar 1 deviates from the one end of shin bone in the text promptly.
The outer circumferential surface of the tail end of the guide bar 1 is threaded for attachment of the tightening part 4. The guide rod 1 is a hollow structure, that is, a through hole with a diameter of 2.2mm is formed in the guide rod along the axis of the guide rod, and is used for a kirschner wire 6 to pass through.
As a preferred embodiment, the outer peripheral surface of the snap ring 2 in this embodiment is surrounded by two arc-shaped surfaces 21 and two flat surfaces 22, and the two flat surfaces 22 are parallel. So that the outer circle of the snap ring 2 forms a waist shape with two straight edges, and two planes 22 on the circumferential surface of the snap ring 2 and the end surface of the snap ring 2 are arranged in an angle, preferably a right angle. These two planes 22 can make things convenient for the later installation pincers 7 that will be mentioned to grasp the snap ring 2, make the snap ring 2 stretch into the rear side approach and overlap the in-process of locating guide bar 1 more stable.
As a preferred embodiment, the clamping portion 3 in this embodiment is slidably inserted into the outer circumferential surface of the guide rod 1 along the radial direction of the guide rod 1, the end of the clamping portion 3 facing away from the guide rod 1 forms a chamfered surface 31, and the chamfered surface 31 faces away from both the guide rod 1 and the fracture block.
Like this, when guide bar 1 inserts from the shin bone front side, joint portion 3 can utilize scarf 31 to retract, and then makes things convenient for whole guide bar 1 to pass, and simultaneously, when installation snap ring 2, scarf 31 also can meet when its contact snap ring 2, and then allows snap ring 2 to cross joint portion 3 and advance.
Specifically, the clamping portion 3 in this embodiment is cylindrical, an axis of the clamping portion 3 extends along a radial direction of the guide rod 1, one end of the clamping portion 3 is inserted into the guide rod 1, and the chamfered surface 31 is formed at the other end of the clamping portion 3. In addition, the quantity of joint portion 3 in this embodiment is four, and four joint portions 3 wait the angle ground and encircle the global of setting in guide bar 1 for steadiness when improving fixed snap ring 2.
It is easy to understand that, the quantity of joint portion 3 can change according to particular case in reality, and more stable effect can all be reached to two or more. Further, the clamping portion 3 may have other shapes than a cylindrical shape, such as a prism shape or other shapes.
As a preferred embodiment, the posterior cruciate ligament tibia insertion avulsion fracture fixation device in this embodiment further includes a spring 5, a slot for inserting the clamping portion 3 is formed on the circumferential surface of one end of the guide rod 1, which is located on the side of the fracture block, which is away from the tibia, the spring 5 is arranged in the slot, and two ends of the spring 5 are respectively connected with the guide rod 1 and the clamping portion 3. The spring 5 is used for driving the clamping part 3 to reset, and after the snap ring 2 is installed, the clamping part 3 retracted stretches out again, so that the snap ring 2 is prevented from withdrawing from the guide rod 1.
It will be appreciated that the above-mentioned spring 5 is only an example of a preferred embodiment for resetting the clamping portion 3, and that in practice, other spring segments may be used for resetting, for example, the spring 5 is replaced by an elastic rubber pad or an elastic element made of other materials, and the same effect can be achieved. Further, the spring 5 may not be provided, and the clamping portion 3 itself may be changed to an elastic structure, for example, a buckle structure in the existing buckle is used as the clamping portion 3, and when the clamping ring 2 is sleeved, the clamping portion 3 may be slightly deformed to allow the clamping ring 2 to pass over.
As a preferred embodiment, the tightening part 4 in this embodiment is a nut, and the tightening part 4 is sleeved on one end of the guide rod 1 away from the tibia and is engaged with the threads on the circumferential surface thereof to realize threaded connection. And through the precession of tightening part 4, can drive guide bar 1 and drive joint portion 3 and snap ring 2 and remove to the direction that is close to tightening part 4, and then tighten up tightening part 4 and snap ring 2, accomplish fixed operation.
It should be noted that, in practice, according to different specific situations, the tightening part 4 may also be of other structures, for example, the tightening part 4 is a plug, and the guide rod 1 is provided with a plurality of insertion holes perpendicular to the axis of the guide rod 1, the plug is inserted into the insertion holes to be fixed, and the insertion holes are arranged at equal intervals along the extending direction of the guide rod 1 to adapt to different sizes.
As a preferable embodiment, the posterior cruciate ligament tibia insertion avulsion fracture fixing device in the embodiment also comprises a Kirschner wire 6, wherein the Kirschner wire 6 is an internal fixing material commonly used in orthopedics, the original specification of the Kirschner wire is generally fixed at about twenty centimeters, and the diameter of the Kirschner wire is different from several specifications of 0.5-2 mm. The bone fracture fixation device is used for fixing short fractures or avulsion fractures and other fractures with low stress, and is also commonly used for fixing temporary fracture blocks in orthopedic operations.
This embodiment kind can be earlier before inserting guide bar 1, can fix a position and predrilled hole with kirschner wire 6, and after the enlarged aperture with can locate kirschner wire 6 with guide bar 1 utilizes its through-hole cover, stretch into shin bone and fracture piece with it along the direction of kirschner wire 6. When the guide rod 1 is fixed, the Kirschner wire 6 can be drawn out. Of course, other possibilities are also possible in practice, such as drilling holes before the guide rod 1 is implanted.
In a preferred embodiment, the present embodiment further includes a mounting pincer 7, the mounting pincer 7 includes two collapsible forceps arms 71, and opposite sides of the two forceps arms 71 are provided with clamping grooves 72 for respectively clamping two planes 22 on the clamping ring 2 to clamp the clamping ring 2. The shape of the clamping groove 72 is matched with the shape of the clamping ring 2 near the plane 22, so that the clamping ring 2 can be clamped stably, and the clamping ring 2 is prevented from sliding in the implantation process. Other structures in the mounting pliers 7, such as handles for driving the movement of the pliers legs 71, can be any known technology, and will not be described herein.
The invention also provides a using method of the posterior cruciate ligament tibia insertion avulsion fracture fixing device, which comprises the following steps:
and 3, mounting the tightening part 4 at one end of the guide rod 1, which is far away from the tibia, so that the tightening part 4 and the clamping ring 2 clamp and fix the tibia and the fracture block.
It can be seen that when the posterior cruciate ligament tibial insertion avulsion fracture fixing device is used, complex threading and wire binding operations are not needed, and the fixation is simpler and more convenient.
Specifically, in combination with all the embodiments described above, the specific use method of the present embodiment is as follows:
1. exposing the posterior cruciate ligament insertion point and the fracture block boundary.
2. The center of the fracture block is located using a conventional posterior cruciate ligament positioner.
3. The k-wire 6 is implanted from the anterior of the tibia.
4. The bone tunnel was enlarged using a 5.5mm drill.
5. The guide rod 1 is implanted until the clamping part 3 completely penetrates out of the fracture block.
6. The snap ring 2 is inserted from the rear side of the knee joint by using the mounting pliers 7 and is sleeved on the guide rod 1 by crossing the clamping part 3.
7. And reversely drawing the guide rod 1 to reset and fix the fracture block.
8. The tightening part 4 is connected to the guide rod 1 at the opening on the anterior side of the tibia, and the tightening part 4 is fixed to the cortex at the opening of the tibia.
When the device is used, the guide rod 1 simultaneously penetrates through the tibia and the fracture block from the front side of the tibia, the clamping ring 2 is sleeved on the guide rod 1 between the clamping part 3 and the fracture block from the rear side access of the knee joint, and the tibia and the fracture block are clamped by the tightening part 4 and the clamping ring 2 through the tightening part 4, so that the tibia and the fracture block are fixed.
Compared with the prior art, the invention omits structures such as a suture, a strap steel plate and the like, and realizes more stable rigid fixation through the tightening part 4 and the snap ring 2 skillfully. Most importantly, the clamping ring 2 only needs to be inserted from the back approach of the tibia during the operation, and the tightening part 4 can be fixed from the front side with less peripheral tissues of the tibia, so that the whole arthroscopic operation does not need to establish a double tibia channel in a complex way, the operation channel does not pass through the popliteal fossa vascular nerve tissues, and the minimally invasive device has the characteristic of being minimally invasive under the whole arthroscope.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other.
While the invention has been described with reference to specific preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A posterior cruciate ligament tibia insertion avulsion fracture fixation device, comprising:
the guide rod is used for penetrating through the tibia and the fracture block;
the clamping ring is detachably sleeved at one end of the guide rod and is used for abutting against one end, away from the tibia, of the fracture block;
the clamping part is connected to one end of the guide rod in a sliding mode along the radial direction of the guide rod, and when the clamping part slides to be embedded into the guide rod, the clamping part can be used for the clamping ring to slide through; when the clamping portion slides to protrude out of the guide rod, the clamping portion is used for limiting the clamping ring to slide towards a direction far away from the tibia;
and the tightening part is detachably connected to the other end of the guide rod along the extension direction of the guide rod and is used for clamping the tibia and the fracture block together with the clamping ring.
2. The posterior cruciate ligament tibia insertion avulsion fracture fixing device according to claim 1, wherein the number of the clamping portions is at least two, and at least two clamping portions are arranged around the circumference of the guide rod at equal angles.
3. The posterior cruciate ligament tibia insertion avulsion fracture fixation device according to claim 2, wherein the clamping portion is slidably inserted into the peripheral surface of the guide rod along the radial direction of the guide rod, the end portion of the clamping portion, which faces away from the guide rod, forms a chamfered surface, and the chamfered surface faces away from the guide rod and the fracture block simultaneously.
4. The posterior cruciate ligament tibia insertion avulsion fracture fixing device according to claim 3, wherein the clamping portion is cylindrical, an axis of the clamping portion extends in a radial direction of the guide rod, one end of the clamping portion is inserted into the guide rod, and the oblique plane is formed at the other end of the clamping portion.
5. The posterior cruciate ligament tibia insertion avulsion fracture fixation device according to claim 4, further comprising a spring, wherein a slot for inserting the clamping portion is formed on the peripheral surface of one end of the guide rod, the spring is arranged in the slot, and two ends of the spring are respectively connected with the guide rod and the clamping portion.
6. The posterior cruciate ligament tibia insertion avulsion fracture fixation device according to any one of claims 1 to 5, wherein a thread is formed on the circumferential surface of the other end of the guide rod, the tightening part is a nut, and the tightening part is sleeved on the guide rod and is in threaded connection with the guide rod.
7. The posterior cruciate ligament tibia insertion avulsion fracture fixation device according to any one of claims 1 to 5, further comprising a Kirschner wire, wherein the guide rod is provided with a through hole along the axis thereof, and the through hole is used for the Kirschner wire to pass through.
8. The posterior cruciate ligament tibia insertion avulsion fracture fixation device according to any one of claims 1 to 5, wherein the outer peripheral surface of the snap ring is enclosed by two arc-shaped surfaces and two planes, and the two planes are parallel.
9. The posterior cruciate ligament tibial insertion avulsion fracture fixation device of claim 8, further comprising a mounting clamp, wherein said mounting clamp comprises two foldable clamp arms, and one side of each of the two clamp arms facing each other is provided with a clamping groove for clamping two planes on the snap ring respectively so as to clamp the snap ring.
10. A use method for the posterior cruciate ligament tibial insertion avulsion fracture fixation device of any one of claims 1-5, comprising:
step 1, implanting the guide rod from the front of a tibia, and penetrating through a fracture block;
step 2, sleeving the clamping ring on the guide rod from the rear side approach of the knee joint, and clamping the clamping ring between the clamping part and the fracture block;
and 3, mounting the tightening part at the other end of the guide rod, so that the tightening part and the clamping ring clamp and fix the tibia and the fracture block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210205070.5A CN114681030A (en) | 2022-03-02 | 2022-03-02 | Posterior cruciate ligament tibia insertion avulsion fracture fixing device and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210205070.5A CN114681030A (en) | 2022-03-02 | 2022-03-02 | Posterior cruciate ligament tibia insertion avulsion fracture fixing device and using method |
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| CN114681030A true CN114681030A (en) | 2022-07-01 |
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| CN202210205070.5A Pending CN114681030A (en) | 2022-03-02 | 2022-03-02 | Posterior cruciate ligament tibia insertion avulsion fracture fixing device and using method |
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| CN212547141U (en) * | 2020-03-11 | 2021-02-19 | 上海市静安区闸北中心医院 | Ejector rod suitable for tibial platform collapse repair |
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