Bone-fracture fixation steel plate systemTechnical field
The present invention relates to medical instruments field, more particularly to a kind of special purpose device for synthetism, specifically one kind connectsBone steel plate system, it is primarily adapted for use in the engagement of shin bone knochenbruch and fixation.
Background technology
Surgeon provides treatment using various equipment and technology for patient.In some operations, Medical Devices are used toConnection, stabilization and/or fixed one or more bone, bone piece or tissue blocks.Similar technology and equipment can be used for spinal operation, especiallyIt is used for spinal fusion surgery.In some of this class process, one or several vertebras can be secured the plate to.These plates are typicallySymmetrically and generally centrally it is fixed on backbone.
Such as the application for a patent for invention that application publication number is CN103826559A, disclose " one kind be used for installed in one orSpine board on multiple vertebras ".Spine board can be asymmetrical lamina of cervical vertebra.Lamina of cervical vertebra can have thicker side, relatively thin side, oneIndividual or multiple threaded fastener holes and one or more lock fastener holes.The shape of lamina of cervical vertebra can with the form fit of vertebra withIt is easily installed, therefore, the shape of the thickness and the lamina of cervical vertebra between thicker side and relatively thin side of thicker side and relatively thin side can be withThe form fit of vertebra.
Such as the patent of invention that Authorization Notice No. is CN101547657B, " a kind of cervical plate system " is disclosed, it includes neckVertebral plate, the lamina of cervical vertebra has thickness between top surface and relative bottom surface, and at least one groove extends through the thickness of the plate.The system also includes：First rotate element, it can be arranged in the first groove of lamina of cervical vertebra, and first rotate element is included at leastOne screwed hole；And at least one bone screw, it can be inserted at least one screwed hole of the first rotate element.
Similar technology and equipment can be additionally used in tibial surgical, and being typically when treating fracture of tibia in the prior art will be fixedSteel plate is placed in front side of shin bone, outer solid easily because front soft tissue injury necrosis causes the serious complication such as plate exposureFixed rack then adds hole for nailing nursery work and made troubles to patient.To solve the problem, it is proposed that crossing following technical scheme.
Such as the application for a patent for invention that application publication number is CN104095676A, a kind of " tibial plateau inner prop locking is disclosedSteel plate ", T-shaped setting, including：The steel plate body of strip and the strip head extended from one end of steel plate body, it is describedBending is set respectively inwards at the both ends on head, and the rounded setting of free terminal of the steel plate body, the steel plate body is provided withSeveral the first screwed holes uniformly arranged, the head is provided with several the second screwed holes uniformly arranged, described to be characterized in that：The side of the steel plate body be provided with several first convex portions and with spaced several first recesses in the first convex portion, the steel plateThe opposite side of body be provided with several second convex portions and with spaced several second recesses in the second convex portion, described several first is convexPortion is symmetrical relative to the longitudinal axis of steel plate body with several second convex portions, several first recesses and several second recess phasesIt is symmetrical for the longitudinal axis of steel plate body.
The content of the invention
It is an object of the invention to provide a kind of bone-fracture fixation steel plate system, fundamentally solves existing bone-fracture fixation steel plate use not sideJust, function is single, intensity difference, stability maintenance is poor, the problems such as can not being finely adjusted.
The technical solution adopted in the present invention is：The bone-fracture fixation steel plate system include with some screws steel plate main body andFor the screw through screw for fixing steel plate main body, main body is made up of key fixed part and epiphysis fixed part, and its technology willPutting is：Arcuate structure is provided with the screw, the lower surface of screw end is engaged with screw arcuate structure；
The left and right sides of key fixed part sets some steel plate gap at equal intervals, along key fixed part length direction successivelyTwo or four or six screws are set, serrate slot is provided between two screws of centre；In serrate slot it is spacing have it is ratchetingScrew assembly, ratcheting screw assembly are made up of screw arbor assembly, gear assembly and swell fixture, and screw arbor assembly is screwedCylinder, cylinder one end are provided with annular groove, and annular groove center is provided with is provided with screw arbor assembly with externally threaded locating piece, annular groove inwallInternal thread；Gear assembly is the hollow structure with gear assembly gap, and gear assembly one end is provided with annular projection, annular projectionOuter wall is provided with the gear assembly external screw thread being engaged with screw arbor assembly internal thread, and annular projection inwall is provided with spiral shell in gear assemblyLine, gear assembly other end trench structure；Swell fixture is T-shaped hollow structure, and swell fixture bottom slopes inwardly and circumferentiallyFour swell fixture gap are evenly equipped with, swell fixture inwall is provided with the swell fixture internal thread being engaged with locating piece external screw thread,Swell fixture outer wall is provided with the swell fixture external screw thread being engaged with gear assembly internal thread；
Epiphysis fixed part is provided with the buckle groove of two symmetrical structures along its length, and buckle groove center is provided with buckle screw,Buckle groove both ends are arranged with screw, and screw is provided with along two buckle screw circle center line connecting directions；It is fixed with and detains in buckle grooveThe buckle that board slot shape is engaged, the bottom at buckle both ends are respectively equipped with spherical surface hill, are provided with the middle part of buckle same with buckle screwThe buckle mounting hole of the heart, buckle are fixed in buckle groove by the buckle screw through buckle mounting hole.
Screw or the buckle screw or swell fixture end are provided with interior hexagonal pilot hole and the assembling through pilot holeGroove.
The buckle is arcuate structure.
The present invention has the advantage that and positive had the technical effect that：Steel plate main body is structure as a whole, epiphysis fixed part slightly toUpper tilting, it is integrally engaged with shin bone epiphysis shape, make fixation more firm.Arcuate structure is set in screw, expands spiral shellAngular range when nail is fixed, the applicability of bone plate is improved, and installed more convenient.And after screw fastening, pass through buttonPlate fastens screw completely, avoids occurring to slip displacement, the spherical surface hill at buckle both ends can be bonded screw end completely, furtherImprove stability.Key fixed part both sides are symmetrical arranged some gap structures, can tie up steel plate with line by operation and apply art boneOn bone, stability is further improved.The teeth groove and ratcheting screw assembly that the middle part use of key fixed part can be finely adjusted, artMiddle use is more convenient.Ratcheting screw assembly is made up of three components screwed togather successively, and screwed main body is used to be fixed on boneOn dry, the teeth portion of gear assembly engages with the serrate slot of key fixed part, can be finely adjusted in art, so as to ensure to be broken by epiphysisThe epiphysis for splitting place's separation preferably coincide with key.Gear assembly is provided with gap structure, can make it have certain elasticity, be beneficial toRegulation, gear assembly is screwed togather by the annular protrusion of one end with main body, convenient for assembly, easy to use.After position adjustments,Swell fixture is screwed in into gear assembly, swell fixture specification is slightly larger than gear assembly inwall, therefore can be by gear assembly expansion lockTightly, swell fixture outer wall screws togather with gear assembly, and swell fixture inwall screws togather with the locating piece on cylinder, is set on swell fixtureGap, certain elasticity is made it have, be easy to be screwed on locating piece, the swell fixture end after screw-in can also be embedded in gearIn the groove of component.Swell fixture can control the rotation of cylinder, while can lock gear assembly.Screw, buckle screw andSwell fixture end is equipped with interior hexagonal pilot hole and the fitting recess through pilot hole, can carry out installing admittedly using multiple types of toolsIt is fixed, it is easy to use.
Brief description of the drawings
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is the configuration schematic diagram of the present invention；
Fig. 2 is the configuration schematic diagram of screw assembly；
Fig. 3 is the cross section structure diagram of locking member；
Fig. 4 is the surface structure schematic diagram of screw；
Fig. 5 is the surface structure schematic diagram of buckle；
Fig. 6 is operation principle schematic diagram I of the present invention；
Fig. 7 is operation principle schematic diagram II of the present invention；
Fig. 8 is use state diagram.
Number explanation in figure：1 steel plate main body, 101 epiphysis fixed parts, 102 key fixed parts, 2 screws, 3 buckles, 4 bucklesScrew, 5 screw arbor assemblies, 6 gear assemblies, 7 swell fixtures, 8 fitting recess, 9 pilot holes, 10 gear assembly internal threads, 11 gear trainsPart gap, 12 teeth portion, 13 locating pieces, 14 locating piece external screw threads, 15 cylinders, 16 cylinder screw threads, 17 annular grooves, in 18 screw arbor assembliesIt is screw thread, 19 trench structures, 20 gear assembly external screw threads, 21 swell fixture external screw threads, 22 swell fixture gap, 23 inclined-planes, 24 swollenSwollen screw internal thread, 25 screw arcuate structures, 26 buckle mounting holes, 27 buckle mounting hole arcuate structures, 28 spherical surface hills, 29 are buckledBoard slot, 30 steel plate gap, 31 screw arcuate structures, 32 serrate slots, 33 buckle screws.
Embodiment
Below in conjunction with Fig. 1 ~ 8, present disclosure is described in detail by specific embodiment.The bone-fracture fixation steel plate system includes bandThere are the steel plate main body 1 of some screws and the screw 2 through screw for steel plate main body 1 to be fixed, steel plate main body is by backboneFixed part 102 and epiphysis fixed part 101 are formed, and arcuate structure is provided with screw, and the lower surface of the end of screw 2 is set and screw arcThe screw arcuate structure 25 that shape structure 31 is engaged.
The left and right sides of key fixed part 102 sets some steel plate gap 30 at equal intervals, along the length of key fixed part 102Direction sets gradually two or four or six screws, and serrate slot 32 is provided between two screws of centre.Serrate slot 32It is interior it is spacing have ratcheting screw assembly, ratcheting screw assembly is made up of screw arbor assembly 5, gear assembly 6 and swell fixture 7, screw rodComponent 5 is the cylinder 15 with cylinder screw thread 16, and the one end of cylinder 15 is provided with annular groove 17, and the center of annular groove 17 is provided with band external screw threadLocating piece 13, the inwall of annular groove 17 is provided with screw arbor assembly internal thread 18.Gear assembly 6 is with gear assembly gap 11Hollow structure, gear assembly 6 are engaged by teeth portion with serrate slot 32, and the one end of gear assembly 6 is provided with annular projection, annular projection outer wallProvided with the gear assembly external screw thread 20 being engaged with screw arbor assembly internal thread 18, annular projection inwall is provided with gear assembly internal thread10, gear assembly other end trench structure 19.Swell fixture 7 is T-shaped hollow structure, and the bottom of swell fixture 7 slopes inwardly to be formedInclined-plane 23, and four swell fixture gap 22 have been evenly distributed, the inwall of swell fixture 7 is provided with to match with locating piece external screw thread 14The swell fixture internal thread 24 of conjunction, swell fixture outer wall are provided with the swell fixture external screw thread being engaged with gear assembly internal thread 1021。
Epiphysis fixed part 101 is provided with the buckle groove 29 of two symmetrical structures along its length, and the center of buckle groove 29 is provided with buttonPlate screw 33, the both ends of buckle groove 29 are arranged with screw, and screw is provided with along two circle center line connecting directions of buckle screw 33.Buckle grooveThe buckle 3 being engaged with the shape of buckle groove 29 is fixed with 29, buckle 3 is arcuate structure, and the bottom at its both ends is respectively equipped with ballFace projection 28, buckle middle part are provided with the buckle mounting hole 26 concentric with buckle screw 33, and mounting hole is provided with buckle installation radialShape structure 27, buckle are fixed in buckle groove 29 by the buckle screw 4 through buckle mounting hole 26.
Screw, buckle screw 4 and swell fixture end are equipped with interior hexagonal pilot hole 9 and the dress through pilot hole 9Slot allocation 8, convenient installation are fixed.