CN105232129A - Fixing device for patella fracture - Google Patents
Fixing device for patella fracture Download PDFInfo
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- CN105232129A CN105232129A CN201510747885.6A CN201510747885A CN105232129A CN 105232129 A CN105232129 A CN 105232129A CN 201510747885 A CN201510747885 A CN 201510747885A CN 105232129 A CN105232129 A CN 105232129A
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- patella
- fracture
- fixture
- hollow screw
- ribbon part
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- 206010034122 Patella fracture Diseases 0.000 title claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 10
- 210000004417 patella Anatomy 0.000 claims description 32
- 208000010392 Bone Fractures Diseases 0.000 claims description 31
- 206010017076 Fracture Diseases 0.000 claims description 31
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 8
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 8
- 238000009954 braiding Methods 0.000 claims description 6
- 208000006670 Multiple fractures Diseases 0.000 claims description 5
- 230000000638 stimulation Effects 0.000 abstract description 5
- 238000002513 implantation Methods 0.000 abstract description 3
- 238000009940 knitting Methods 0.000 abstract 5
- 208000004550 Postoperative Pain Diseases 0.000 abstract 1
- 230000036770 blood supply Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 239000007943 implant Substances 0.000 description 7
- 208000027418 Wounds and injury Diseases 0.000 description 5
- 210000000988 bone and bone Anatomy 0.000 description 5
- 210000000629 knee joint Anatomy 0.000 description 5
- 239000004696 Poly ether ether ketone Substances 0.000 description 4
- 239000008280 blood Substances 0.000 description 4
- 210000004369 blood Anatomy 0.000 description 4
- 229920002530 polyetherether ketone Polymers 0.000 description 4
- 210000003314 quadriceps muscle Anatomy 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 210000000426 patellar ligament Anatomy 0.000 description 3
- 230000002980 postoperative effect Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 206010003246 arthritis Diseases 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 210000003195 fascia Anatomy 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 210000004872 soft tissue Anatomy 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 208000024779 Comminuted Fractures Diseases 0.000 description 1
- 206010016654 Fibrosis Diseases 0.000 description 1
- 206010061218 Inflammation Diseases 0.000 description 1
- 208000002658 Intra-Articular Fractures Diseases 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 229920010741 Ultra High Molecular Weight Polyethylene (UHMWPE) Polymers 0.000 description 1
- 230000027455 binding Effects 0.000 description 1
- 238000009739 binding Methods 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004761 fibrosis Effects 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 230000004054 inflammatory process Effects 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000017074 necrotic cell death Effects 0.000 description 1
- 210000004285 patellofemoral joint Anatomy 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 108010048734 sclerotin Proteins 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
- 238000009941 weaving Methods 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
- 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
- A61B17/683—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
- 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
- A61B17/685—Elements to be fitted on the end of screws or wires, e.g. protective caps
-
- 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
- A61B17/686—Plugs, i.e. elements forming interface between bone hole and implant or fastener, e.g. screw
-
- 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
- A61B17/82—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin for bone cerclage
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/04—Macromolecular materials
- A61L31/048—Macromolecular materials obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/04—Macromolecular materials
- A61L31/06—Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Neurology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vascular Medicine (AREA)
- Epidemiology (AREA)
- Prostheses (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a fixing device for a patella fracture. The fixing device comprises a strap-shaped knitting part and hollow screws. A traction needle is connected to at least one end of the strap-shaped knitting part. The hollow screws are arranged in reserved drill holes in the patella fracture. The strap-shaped knitting part penetrates into center holes of the hollow screws under driving of the traction needles and presses the patella fracture in an intersecting mode. The fixing device has excellent biocompatibility, stimulation on the implanting position from the implantation material is avoided, and the problem that the implantation material needs to be taken out through a secondary operation is solved; the strap-shaped knitting part has low elasticity modulus, the screws have a dynamic pressurizing characteristic, blood supply to the fixed part is effectively protected while efficient fixing is provided, postoperative pain of a patient is relieved, and the rehabilitation period of the patient is shortened; the strap-shaped knitting part provides an effective fixing mode for the slight comminuted patella fracture.
Description
Technical field
The present invention relates to Design for Medical Device technical field, be specifically related to a kind of fixture of Patella fracture.
Background technology
Patella is the maximum sub-bone of human body, is positioned at knee joint front, has the kneed effect of protection.Patella articular surface is below relative with femoral bone pulley face.Quadriceps femoris is attached to patella upper limb, and part fascia extends for patellar ligament through patella front, terminates in tibial tubercle.Patella plays vital effect in human knee's motion, and such as, as the intermediate structure of Quadriceps mechanism, the pulling force that quadriceps femoris produces is transmitted to kneecap tendon by it; Patella plays leverage when stretching knee joint, effectively can increase the axle point of lever arm of force Quadriceps mechanism bends and stretches to(for) knee joint; By the slip of patella on femoral bone pulley face, quadriceps femoris also can be cut down to the friction before distal part of femur.
Patella fracture is clinical common intra-articular fracture, and its incidence rate accounts for 1% of whole body each position fracture.Patella fracture is often acutely shunk suddenly by direct external force or quadriceps femoris to cause, and can cause knee joint equipment asynechia and the imbalance of potential patellofemoral joint after fracture.
During Patella fracture operative treatment, need the internal fixtion tolerating high-tension.The traditional fixing means of Patella fracture is tension band wiring method.Steel wire is placed in patella tension side, make it when bearing function shape load, due to shrinkage factors such as muscle, steel wire can become power tension conversion effectively, produces axial pressure between axle head, does not produce revolving force, be conducive to the stability of internal fixtion.Two Kirschner wires are positioned at the central authorities of sclerotin, play the effect preventing rotation and angulation.AO school improves tension band wiring technology, has createed hollow nail tension band method, operation is met " AO principle ", becomes the classical way of clinical treatment Patella fracture gradually.
But there are some clinical shortcomings in hollow nail tension band method: one is that hollow nail stimulates surrounding soft tissue to produce pain, and hollow nail fracture loosens, and the stimulation at postoperative bird caging position causes patient uncomfortable; Two is that operation technique is complicated, and wound is comparatively large, needs second operation to take out internal fixtion; Three be bear in linear fixing band and patella contact site unit are pressure cause more greatly soft tissue can downright bad, liquefy, absorb, fibrosis, make tension band wire loosening, four is be difficult to fix for smashing fracture.
To sum up, need the operation device and using method thereof that find a kind of novel treatment Patella fracture badly, the seriality of patella and the planarization of articular surface can be recovered simply efficiently, preventing injuries property arthritis, repair aponeurosis, stretch action and maintenance function to recover kneed.
Summary of the invention
The invention provides a kind of fixture of Patella fracture, comprise ribbon part and hollow screw, described ribbon part at least one end is connected with hollow screw described in pull needle and is arranged on Patella fracture place and connects multiple fracture portions, described ribbon part is located in the centre bore of described hollow screw under the drive of described pull needle, and described ribbon part is staggered form is pressed in Patella fracture place.
Preferably, described ribbon part adopts ultrahigh molecular weight polyethylene yarn braiding to form.
Preferably, the thickness of described ribbon part is 0.19 ~ 0.21mm, and width is 2.5 ~ 4.5mm.
Preferably, the maximum anti-pressure ability of described ribbon part is more than or equal to 60 ± 10MPa, and the elongation at break of described ribbon part is 20% ~ 30%.
Preferably, described ribbon part connects described pull needle by connecting line, and described connecting line is the stitching thread adopting ultra-high molecular weight polyethylene braiding.
Preferably, the bonding strength between described connecting line and described pull needle, described ribbon part is more than or equal to 80N.
Preferably, described hollow screw adopts polyetheretherketonematerials materials to be made.
Preferably, the end of the head end of described hollow screw is reserved with non-threaded mouth.
Preferably, it is hexagonal structure that the end of the tail end of described hollow screw is arranged to cross section.
Preferably, the fracture strength of described hollow screw is more than or equal to 90Mpa.
Preferably, described hollow screw lateral surface is not all provided with thread segment; Connect multiple fracture portions in the patella that described hollow screw is placed in fracture, and hollow screw at least one fracture portions is not provided with described thread segment.
Preferably, described fixture at least includes two hollow screws, and described two hollow screws insert Patella fracture offside perpendicular to fracture face, and described two hollow screws are parallel to each other.
Preferably, after described ribbon partially passes through hollow screw described in two, the arrangement in " 8 " font.
The present invention, owing to adopting above technical scheme, makes it compared with prior art, has following advantage and good effect:
The fixture of Patella fracture provided by the invention, with " BO principle " for instructing, the ribbon incorporating aspects become with a strip adoption ultrahigh molecular weight polyethylene by the hollow screw adopting polyether-ether-ketone to make forms; The present invention has excellent biocompatibility, avoids the stimulation of implant to implant site, solves the difficult problem that implant needs second operation to take out; Ribbon part has lower elastic modelling quantity, bolt portion adopts half-thread design, and while providing patella efficiently to fix, the blood of the fixed form available protecting of dynamic pressurization fixed position supplies, reduce the misery after operation in patients, shorten the recovery period of patient; Ribbon part also can provide effective fixed form for slight comminuted patellar; The problems such as in addition, the present invention introduces " Wicresoft " theory, solves previous procedure complicated operation, and wound is large, and postoperative patient pain, local excitation are serious.
Accompanying drawing explanation
By reference to the accompanying drawings, by hereafter state detailed description, more clearly can understand above-mentioned and other feature and advantage of the present invention, wherein:
Fig. 1 is the structural representation of ribbon part and pull needle in the present invention;
Fig. 2 is the structural representation of hollow core screw rod of the present invention;
Fig. 3 is the schematic diagram that fixture provided by the invention fixes the patella of fracture.
Symbol description:
1-patella
2-ribbon part
3-pull needle
4-hollow screw
The non-threaded mouth of 41-
42-hexagonal structure
5-connecting line.
Detailed description of the invention
See the accompanying drawing that the embodiment of the present invention is shown, hereafter in more detail the present invention will be described.But the present invention can realize in many different forms, and should not be construed as by the restriction in the embodiment of this proposition.On the contrary, it is abundant and complete open in order to reach for proposing these embodiments, and makes those skilled in the art understand scope of the present invention completely.In these accompanying drawings, for clarity sake, may be exaggerated size and the relative size in layer and region.
With reference to Fig. 1-3, the invention provides a kind of fixture of Patella fracture, include ribbon part 2 and hollow screw 4, hollow screw 4 is arranged in the reserved boring in Patella fracture place, tentatively connects the patella of having fractured; Ribbon part 2 is located in the centre bore of hollow screw 4, and makes ribbon part 2 be pressed in Patella fracture place in staggered form, and ribbon part 2 plays tightens up fixing effect.The present invention can recover the seriality of patella and the planarization of articular surface simply efficiently, preventing injuries property arthritis, repairs aponeurosis, stretches action and maintenance function to recover kneed.
Concrete, ribbon part 2 adopts ultra-high molecular weight polyethylene (UHMWPE) yarn to weave and forms, to take out without the need to second operation after making ribbon part implant, reduce the generation of side reaction, this strength of materials is higher simultaneously; First yarn can be woven into tubular during concrete braiding, then warp loom pressing is shaped into banded structure, the weaving manner of certain ribbon part 2, not as limit, is not restricted herein; Woven ribbon part 2 forms some equally distributed mesh, and the shape of mesh can be square, rectangle etc., is not restricted herein.
The thickness preferably 0.19 ~ 0.21mm of ribbon part 2, ribbon part 2 can not be too thick, prevents Post operation from forming projection, to ensure the planarization of articular surface, can not be too thin, to ensure the intensity of ribbon part 2.The width of ribbon part 2 preferably width is 2.5 ~ 4.5mm, and the choosing value of its width specifically can be determined according to the size of patella, is usually provided with 3.0mm, 3.5mm and 4.0mm tri-specifications for you to choose.The length of ribbon part 2 can set as the case may be, is usually set to 30cm.
Above-mentioned each size about ribbon part 2, all do not do the setting of occurrence in the present invention, while setting as the case may be, need ensure that the maximum tensile strength of ribbon part 2 is not less than 60 ± 10MPa, to ensure that ribbon part effectively can fix the patella of fracture, make its not easy fracture; In addition, also must ensure that the elongation at break of ribbon part 2 is not less than 20%; The elongation at break of ribbon part 2 can not be too large, too conference makes ribbon part 2 occur the phenomenon relaxed after a long time use, the elongation at break of ribbon part 2 can not be too little, too little meeting makes ribbon part cause compressing to patella, the problem such as cause blood circulation not smooth, the scope of the elongation at break of preferred ribbon part 2 is 20% ~ 30%.
The present invention replaces wire of the prior art etc. by ribbon part 2, flexible ribbon part 2 adds the area contacting standing part with patella 1, reduce the pressure that contact standing part unit are is born, protect the local blood fortune of the portion of tissue that is fixed, avoid the generation of tissue necrosis; Meanwhile, flexible tape knitted parts 2 has low elastic modulus, has certain micro-bullet self-lock ability; make fixing more firm, provide efficient fixing while, the blood of available protecting fixed position supplies; reduce the misery after operation in patients, shorten the recovery period of patient.In addition, ribbon part 2, for slight comminuted patellar, also can provide effective fixing.
In the present embodiment, at least one end is connected with pull needle 3 in the two ends of ribbon part 2, pull needle 3 is for guiding banded knitted parts 2 through the centre bore of hollow screw 4; Ribbon part 2 can only have one end to be provided with pull needle 3, and preferred two ends are provided with pull needle 3, completes connecting of ribbon part 2 fast so that convenient in operation process.
The eyeless suture needle that pull needle 3 preferably adopts 304 rustless steels to process, the long 15cm of pin, diameter 1.0mm; Certainly, the material of pull needle 3 and size, not as limit, can be selected as the case may be.Pull needle 3 is connected with ribbon part 2 by connecting line 5, and connecting line 5 is the stitching thread adopting ultra-high molecular weight polyethylene braiding, and length is about 3cm.Connecting line 5 is connected with ribbon part 2 by modes such as stitching, bindings, and bonding strength is not less than 80N, to ensure the fastness connected; Pull needle 3 and connecting line 5 link together by modes such as mechanical press, and bonding strength is not less than 80N, to ensure the fastness connected.
In the present embodiment, fixture includes two hollow screws 4, two hollow screw 4 and inserts fracture offside perpendicular to fracture face, and two hollow screws 4 are parallel to each other, specifically as shown in Figure 3; If comminuted fracture, hollow screw 4 can be connected on larger sclerite.
Wherein, hollow screw 4 adopts polyetheretherketonematerials materials (PEEK material) to be made, the hollow screw 4 of PEEK material is excellent with the bio-compatible performance of the ribbon part 2 of UHMWPE material, do not need second operation to take out after implantation, and greatly reduce the generation of many side reactions such as pessimal stimulation and inflammation.The diameter of hollow screw 4 can be 4mm, and length can be the plurality of specifications such as 40mm, 45mm, 50mm, 55mm, 60mm; Each size of hollow screw 4 all can set according to concrete condition, is not restricted herein; The fracture strength of hollow screw 4 is not less than 90Mpa, to ensure the constant intensity of hollow screw 4.
Hollow screw 4 is inserted in boring default on patella 1, head end due to hollow screw 4 is provided with thread segment, diameter is relatively large, there is foreign body sensation to prevent the head end of hollow screw 4 from stretching out patella simultaneously, therefore need in prior art to carry out expanding treatment to the both ends of boring, the patella bone wall of drilling end certainly will be caused so thinner, easily occur the problems such as slight crack; In addition, because hollow screw 4 diameter is less, the medial wall for thread segment place hollow screw centre bore also there will be screw thread, cause wearing and tearing or screw head to ftracture because wall thickness is thinner to belt.
As shown in Figure 2, by being reserved with non-threaded mouth 41 at the end of hollow screw 3 head end in the present invention, its head end end diameter is reduced, thus makes when not needing to carry out enlarging or less reaming to drilling end, the end of hollow screw 4 also can be made lower than surface of bone; And the medial wall of non-threaded mouth 41 there will not be screw thread, decrease the friction of ribbon part 2 and screw thread.
The end of the tail end of hollow screw 4 being also arranged to cross section is hexagonal hexagonal structure 42, and its tail end end diameter is reduced, convenient supporting with the general spiral shell vertebra for installing hollow screw on the one hand, ensures that the afterbody of hollow screw 4 is lower than surface of bone on the other hand.
In the present embodiment, hollow screw 4 not all being provided with thread segment, when connecting multiple fracture portions in the patella that hollow screw is placed in fracture, and hollow screw 4 at least one fracture portions not being provided with thread segment; Thus make the patella section fixed can have slight activity, play the effect of dynamic pressurization, be conducive to the healing of patella section.Wherein thread segment can be arranged on the head end side by hollow screw, also can be arranged on the tail end side by hollow screw 4, not be restricted herein.
Such as shown in Fig. 3, patella is broken into upper and lower two fracture portions, hollow screw 4 connects two fracture portions perpendicular to end face, and the hollow screw 4 being wherein positioned at the fracture portions of lower end is provided with thread segment, and the hollow screw 4 being positioned at the fracture portions of upper end is not provided with thread segment; After two fracture portions connect, the movement that upper end fracture portions can be slight, make can be slight between the end face of upper end fracture portions and lower fracture part activity.
The present invention for instructing, develops a kind of operation device of novel treatment Patella fracture with " BO principle ", and the ribbon incorporating aspects become with a strip adoption ultrahigh molecular weight polyethylene by the hollow screw adopting polyether-ether-ketone to make forms; The present invention has excellent biocompatibility, avoids the stimulation of implant to implant site, solves the difficult problem that implant needs second operation to take out; Ribbon part has lower elastic modelling quantity, and bolt portion half-thread dynamic pressurization designs, and while providing patella efficiently to fix, the available protecting blood confession of fixed position, reduces the misery after operation in patients, shorten the recovery period of patient; Ribbon part also can provide effective fixed form for slight comminuted patellar; The problems such as in addition, the present invention introduces " Wicresoft " theory, solves previous procedure complicated operation, and wound is large, and postoperative patient pain, local excitation are serious.
Below with regard to the occupation mode of fixture in operation of Patella fracture provided by the invention, be further described:
Cut one before knee joint to be about 6cm and to indulge shape or arc transverse incision and cut skin, be separated flap between deep fascia with patellar ligament, appear Patella fracture position, protect patellar ligament enlarged portion;
Congestion in normal saline cleaning articular cavity, fracture anatomical reduction, and temporary fixed;
Vertically fracturing with two pieces of Kirschner wires, face is parallel inserts fracture offside, select the core drill of suitable diameter (being generally 3.0mm) to be enclosed within Kirschner wire to hole, if syntripsis, then hole on main larger sclerite, duct spacing is selected according to the practical situation of fracture, but two pieces of screws basis equalization principle in stress distribution should be followed, make it be parallel to each other substantially;
Use 4.0mm tap tapping again, insert the hollow screw 4 of respective diameters and length, and make nail tail and ailhead two ends all lower than surface of bone.
Pull needle introduces the ribbon part of suitable model by hollow screw, preferred ribbon part in " 8 " arrangement, and tighten up in hollow screw one end, tie a knot fixing.
Because those skilled in the art should be understood that the present invention can not depart from the spirit or scope of itself with many other concrete forms realizations.Although described case study on implementation of the present invention, the present invention should be understood and should not be restricted to these embodiments, within the spirit and scope of the present invention that those skilled in the art can define as appended claims, make change and amendment.
Claims (13)
1. a fixture for Patella fracture, is characterized in that, comprises ribbon part and hollow screw, and described ribbon part at least one end is connected with pull needle; Described hollow screw is arranged on Patella fracture place and connects multiple fracture portions, and described ribbon part is located in the centre bore of described hollow screw under the drive of described pull needle, and described ribbon part is staggered form is pressed in Patella fracture place.
2. the fixture of Patella fracture according to claim 1, is characterized in that, described ribbon part adopts ultrahigh molecular weight polyethylene yarn braiding to form.
3. the fixture of Patella fracture according to claim 1, is characterized in that, the thickness of described ribbon part is 0.19 ~ 0.21mm, and width is 2.5 ~ 4.5mm.
4. the fixture of Patella fracture according to claim 1, is characterized in that, the maximum anti-pressure ability of described ribbon part is more than or equal to 60 ± 10MPa, and the elongation at break of described ribbon part is 20% ~ 30%.
5. the fixture of Patella fracture according to claim 1, is characterized in that, described ribbon part connects described pull needle by connecting line, and described connecting line is the stitching thread adopting ultra-high molecular weight polyethylene braiding.
6. the fixture of Patella fracture according to claim 5, is characterized in that, the bonding strength between described connecting line and described pull needle, described ribbon part is more than or equal to 80N.
7. the fixture of Patella fracture according to claim 1 and 2, is characterized in that, described hollow screw adopts polyetheretherketonematerials materials to be made.
8. the fixture of Patella fracture according to claim 1, is characterized in that, the end of the head end of described hollow screw is reserved with non-threaded mouth.
9. the fixture of the Patella fracture according to claim 1 or 8, is characterized in that, the end of the tail end of described hollow screw being arranged to cross section is hexagonal structure.
10. the fixture of Patella fracture according to claim 1, is characterized in that, the fracture strength of described hollow screw is more than or equal to 90Mpa.
The fixture of 11. Patella fracturies according to claim 1, is characterized in that, described hollow screw lateral surface is not all provided with thread segment; Connect multiple fracture portions in the patella that described hollow screw is placed in fracture, and hollow screw at least one fracture portions is not provided with described thread segment.
The fixture of 12. Patella fracturies according to claim 1, it is characterized in that, described fixture at least includes two hollow screws, and described two hollow screws insert Patella fracture offside perpendicular to fracture face, and described two hollow screws are parallel to each other.
The fixture of 13. Patella fracturies according to claim 12, is characterized in that, after described ribbon partially passes through hollow screw described in two, and the arrangement in " 8 " font.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510747885.6A CN105232129B (en) | 2015-11-06 | 2015-11-06 | A kind of fixation device of patellar fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510747885.6A CN105232129B (en) | 2015-11-06 | 2015-11-06 | A kind of fixation device of patellar fracture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105232129A true CN105232129A (en) | 2016-01-13 |
| CN105232129B CN105232129B (en) | 2019-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510747885.6A Active CN105232129B (en) | 2015-11-06 | 2015-11-06 | A kind of fixation device of patellar fracture |
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Cited By (5)
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| CN110960306A (en) * | 2018-09-29 | 2020-04-07 | 丁伟 | Patella fracture packing and fixing device |
| CN112869858A (en) * | 2021-01-13 | 2021-06-01 | 赵瑞霞 | Degradable shape memory rib internal fixation body |
| CN114376701A (en) * | 2021-12-21 | 2022-04-22 | 长春圣博玛生物材料有限公司 | High-strength screw |
| CN114767329A (en) * | 2022-06-21 | 2022-07-22 | 北京天星博迈迪医疗器械有限公司 | Knee joint cruciate ligament repair fixing device |
| WO2023173887A1 (en) * | 2022-03-17 | 2023-09-21 | 航天中心医院 | Patella fracture hollow screw-cable locking system |
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| CN112869858A (en) * | 2021-01-13 | 2021-06-01 | 赵瑞霞 | Degradable shape memory rib internal fixation body |
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| CN114376701B (en) * | 2021-12-21 | 2023-02-14 | 长春圣博玛生物材料有限公司 | High-strength screw |
| WO2023173887A1 (en) * | 2022-03-17 | 2023-09-21 | 航天中心医院 | Patella fracture hollow screw-cable locking system |
| CN114767329A (en) * | 2022-06-21 | 2022-07-22 | 北京天星博迈迪医疗器械有限公司 | Knee joint cruciate ligament repair fixing device |
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| CN105232129B (en) | 2019-03-19 |
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