CN203802555U - Fixing system in anterior cervical spine - Google Patents
Fixing system in anterior cervical spine Download PDFInfo
- Publication number
- CN203802555U CN203802555U CN201420149328.5U CN201420149328U CN203802555U CN 203802555 U CN203802555 U CN 203802555U CN 201420149328 U CN201420149328 U CN 201420149328U CN 203802555 U CN203802555 U CN 203802555U
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- Prior art keywords
- fixing
- fixing feet
- anterior cervical
- cervical vertebrae
- connecting rod
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- Expired - Lifetime
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Landscapes
- Prostheses (AREA)
- Surgical Instruments (AREA)
Abstract
The utility model discloses a fixing system in an anterior cervical spine. The fixing system in the anterior cervical spine comprises a pair of oppositely arranged fixing feet; the ends of the pair of fixing feet are connected by a fixing foot connection rod; the other ends of the fixing feet are conical; a saw blade hook is arranged at the inside surface of each fixing foot; saw teeth are arranged at two sides of each saw blade hook; the middle of the fixing foot connection rod is hollowed to form an observation window. An externally expanded force is performed on the middle of the observation window at the inside of the fixing foot connection rod, and meanwhile, the two fixing feet are continuously pressed to the inside, so the effect for pressing and fixing a single segment cervical spine is achieved; the fixing system accords with the physiological structural features of the cervical spine, is good in fitting performance, can realize effective fixing, and is simple in structure, and easy to mount and adjust. In addition, the fixing system is integrally formed by machining and uses a degradable magnesium-magnesium alloy matched bioactivity coating, the degrading speed of the magnesium and magnesium alloy can be effectively controlled, and the damage caused by the separation of a steel nail and a steel plate and the taking out in a second operation is fully avoided.
Description
Technical field
This utility model relates to a kind of medical fixed system, relates in particular to a kind of internal fixing system for anterior cervical vertebrae.
Background technology
Since people's paper anterior cervical vertebrae bone-graft fusion operations such as nineteen fifty-five Robinson and Cloward in 1961, modus operandi fixing in anterior plate fixation screw is widely accepted, and particularly at aspects such as clinical treatment cervical spinal trauma fracture, dislocation and degeneration cervical spondylosis, is widely used.The fixing stability that has significantly strengthened cervical vertebra and plant bone mass in row anterior plate screw after disc removal bone grafting, reduced and can cause the pathology of pseudoarticulation formation movable, the loss that can prevent intervertebral height promotes bone-graft fusion, and patient can early ambulation, reduces the generation of post-operative complication.
Steel plate screw is fixing of a great variety, and general steel plate and screw are fixed, and the risk that screw is deviate from may occur, damage esophagus, trachea, blood vessel and nerve etc.; More advanced is that locking plate screw is fixed, and its advantage is that screw and steel plate are connected as a single entity, and steel plate can stop exiting of screw, even screw loosening while exiting from vertebral body, screw and steel plate often together move, and screw afterbody can not deviate from alone from steel plate, have reduced the danger of esophagus damage.In addition, also having the one of relating to steel plate screw system, is mainly to be formed by titanium or titanium alloy materials processing, and whole structure has been avoided the risk of de-nail completely.
But due to the elastic modelling quantity of the titanium material elastic modelling quantity far above skeleton,, there is stress-shielding effect in the normal stress environment that can destroy skeleton healing, not only hinders the quick formation of fracture site callus, also the complication such as osteoporosis can be caused, when serious, also refracture can be caused.There is in addition more patient can complain foreign body sensation after esophagus, even occur esophagus irritation; Even without there is above-mentioned complication, implants has been brought no small psychological burden retaining to a lot of patients of cervical region.These related complications are perplexing spinal surgery doctor for a long time.
In prior art, for cervical vertebra one, fix, relate generally to following product and patent.MEDICREA company proposes a kind of C-JAWS cervical vertebra pressure fixer, and by pure titanium metal, T40 forms, single structure design; Patent CN201248760U discloses a kind of cervical vertebra front-path memory alloy pressure fixing device: comprise fixing feet and stationary links.Holder is provided with two approximate symmetrical fixing feet, and two fixing feet tops are connected with stationary links, angle α between fixing feet and stationary links, and 60 °≤α≤88 °, fixing feet bottom is with the sawtooth hook that makes progress, and holder material adopts memorial alloy.This utilization memory alloy material is not degraded, and needs second operation to take out, and increases patient's misery.Patent CN200939166U discloses a kind of shape memory fixer for vertebral canal plastic operation, is a kind of shape memory holder for Via Posterior Spinal Approach spinal canal decompression plasty.It is made with niti-shaped memorial alloy, by rectangular metal plate and hook solid jaw, formed, the interlude of rectangular metal plate is arch bending, for extending part, its two ends are fixing head, fixed claw is located at respectively the intersection below of two ends extending part and fixing head, and itself and fixing head are combined into the fixed part of tiger's jaw shape, in order to the residual end on the fixing cut vertebral plate of interlock both sides.During use, utilize Nitinol at design temperature, to there is the characteristic of recovering given shape, first under 0～4 ℃ of low temperature, make its deliquescing, bending extending part, opens fixed part, and the residual end of vertebral plate is placed in tiger's jaw, then heating to the temperature of setting restores to the original state holder, fixed part is with regard to the fixing residual end of vertebral plate of interlock, and by the stretching, extension of extending part, vertebral plate strutted, and reaches the object that spinal canal decompression is shaped.This technology is mainly that to utilize the feature of memorial alloy to realize pressurization fixing, and non-degradable, needs secondary to take out in addition.Patent CN200810163689.4 has proposed a kind of titanium alloy cervical vertebra pressure fixer and preparation method thereof, the disclosed titanium alloy cervical vertebra pressure fixer of this utility model is U font overall structure, two tops of U font opening part are respectively rectangular pyramid, the front and back side on two limits of U font is indentation respectively, article two, the inner side on limit has the little hook at the bottom of U font, and the bottom of U font has the hole of hollow out.Through being careful, silk thread cutting, mold pressing and surface treatment are prepared from.This technology is by titanium alloys for molding, and single structure design, and compression molding, easily produce the shortcomings such as stress concentration, and titanium alloy non-degradable, needs the problems such as secondary taking-up.Patent CN201110234035.8 relates to a kind of vertebrae front fixing plate without screw and fixing means thereof, and the middle position of fixing head is established and put loophole, is provided with tabular nail on fixing head, and fixing head and tabular nail are integral type structure.There are the following problems for this utility model: the single design of structure, and nail leg structure, titanium alloy material non-degradable, foreign body sensation is strong.Patent CN01214732.X relates to a kind of self locking device for cervical vertebra, on the two ends of the main body steel plate of this device, be designed with the perpendicular dentation wing that is one, on main body steel plate, be equiped with hold-down screw, in the both side edges of the dentation wing, be designed with pawl, its termination is edge of a knife shape structure, is not integrative-structure.
In prior art, the patent that is degradation material for bone implant is as follows: the apatite coating on patent 201180034745.4MG screw, this patent relates generally to the biodegradable implant based on magnesium of the corrosion rate with reduction and manufactures the method for this implant.It is a kind of surperficial method for the treatment of biodegradable metal implant, comprise the following steps: the dispersion of the apatite that comprises colloid dispersion is provided and apatite powder is added to dispersion, make implant stand dispersion, make the surface impregnation of pending implant in this dispersion, wherein implant comprises the alloy based on magnesium, in the implant as the first electrode and be arranged between the second electrode in dispersion and apply AC voltage difference, to produce plasma electrolytic oxidation on the dipping surface in this implant, make the surface of dipping change into oxidation film, the apatite that the apatite that described film is disperseed by colloid at least partly and apatite powder form covers.The hydrogen that corrosion causes produces and reduces and bone fusion improvement.Patent 201210424063.0 relates to a kind of high strength can absorb compound orthopedic fixation device of magnesio and preparation method thereof, mainly by pore structure, being rendered as the lower content polylactic acid macromolecular material of filling in low porosity porous magnesium alloy matrix that gradient distribution rule distributes and pore structure thereof solidifies and makes through high temperature bond, wherein, pore structure in porous magnesium alloy matrix presents that porosity from magnesium alloy matrix surface to core or from edge to center reduces gradually and gradient distribution that bore hole size diminishes gradually distributes, count by weight percentage, fill and account for 5%～49.9% of gross weight with macromolecular material polylactic acid, porous magnesium alloy matrix accounts for 50.1%～95% of gross weight.Patent 201110081681.5 discloses the interior fixing metal embracing fixator of using of fracture that a kind of degradable in vivo absorbs, and consists of, or formed by several pawl type fixed parts and connecting plate alternate combinations single pawl type fixed part.Described girdle device is made by degradable metal material.Girdle device tightly wraps cage by fixed claw by fracture site, to realize the linking para-position of knochenbruch; Girdle device connecting plate links together pawl type fixed part, and fits in the shape of bone.Chinese patent CN101283922A discloses and has been used as fixing magnesium alloy bone panel material and face shaping in orthopaedics, and this class hone lamella just can reach fixed effect except coordinating nail to use.The shortcoming of this class hone lamella is: first, when more broken bone or fracture line appear in fracture site, will greatly increase the use amount of used hone lamella or nail; Secondly, magnesium alloy strength is lower, cannot directly screw in bone, needs first with hard nail tapping such as rustless steels, to revolve hole, and this has increased doctor's operating difficulty and operating time; Finally, it is the destruction again to bone that nail screws in, and increases original wound area, has extended recovery period, has increased patient suffering.Therefore, meeting under the prerequisite of fracture fixation effect, how to reduce and even do not use the wedging type stiff ends such as nail of magnesium alloy to become the key of improving magnesium alloy internal fixation device therapeutic effect.In the clinical practice of fractures, often occur not needing nail to fix or fracture site cannot be by the fixing situation of nail.Patent 201010116106.X discloses a kind of self-degradation bioactive metal anchoring nail of field of biomedicine technology and has been made by magnesium or magnesium alloy, and its outer surface is optionally provided with osteoid apatite coating.Patent 201020674925.1 discloses the absorbable metal magnesium intervertebral of a kind of hollow, and described fusion device is made by pure magnesium or magnesium alloy, and inside is hollow cavity, and the shape of the hollow cavity of described fusion device is consistent with the outermost layer shape of whole fusion device; Described fusion device is horizontal by angle of inclination, and surface is provided with and holds parts, the holes at lateral wall of fusion device.Patent 201310227538.1 relates to a kind of novel complete biological controlled degradation nail and using method thereof, and this nail is combined by magnesium alloy drive screw, the fluid sealant three of outer drive screw, internal layer.The main component of outer drive screw is carbon dioxide copolymer, adopt the plastic working methods such as batch mixing, pelletize, extrusion calendaring, punching to make outer drive screw, screwed hole is made at center, the front end of nail can have notch, in the nut position of outer drive screw, make standard " cross " screw socket in by its implantable bone hole, the internal layer drive screw of magnesium alloy material can be housed in screwed hole.The fluid sealant that ectonexine screw is made in conjunction with exposed position coating certain content methyl ethyl carbonate fat or ethyl acetate, three's use capable of being combined also can be used alone outer type thread bone nail as bone marrow staple.Patent 200780035008.X provides a kind of implant consisting of biodegradable magnesium alloy or the implant of surface coated magnesium alloy and the manufacture method of this kind of implant.According to the implant of this patent, there is biodegradable characteristic, and can control easily its biological degradation rate.In addition the intensity of this kind of implant and very excellent to the interface intensity of osseous tissue.It is mainly the design about material.Patent 201210311236.8 discloses a kind of medical degradable magnesium alloy bone hold-down screw, and it relates to a kind of bone hold-down screw, solves the technical problem that existing bone hold-down screw can not be degraded.Patent 201180062066.8 discloses a kind of Medical implant, and it comprises biodegradable magnesium base alloy, and at least a portion on its top layer comprises magnesium carbonate.Comprising a method of manufacturing biocompatible, corrosion-resistant protectiveness top layer on the Medical implant of magnesium base alloy, do not relate to specific product.Patent 201080031790.X relates to the implant with the magnesium metal alloy that can be absorbed by health, wherein metal material is magnesium alloy, it contains at least 96 % by weight magnesium, and at least one rare-earth metals of at least 1 % by weight manganese and at least 0.5 % by weight, relates generally to design of material.
The patent that more than relates to magnesium alloy mainly relates to raw material, surface treatment and some fusion devices, screw etc., does not all have specially, for anterior cervical vertebrae fixed system, especially not relate to the technology points such as one pressure structure.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of internal fixing system for anterior cervical vertebrae, meets cervical vertebrae physiological construction features, and stickiness well also can realize effectively fixing, and simple in structure, is easy to install regulate.
This utility model is to solve the problems of the technologies described above the technical scheme adopting to be to provide a kind of internal fixing system for anterior cervical vertebrae, the fixing feet that comprises pair of opposing, one end of described a pair of fixing feet is connected by fixing feet connecting rod, the other end of described fixing feet is tapered, the medial surface of described fixing feet is provided with sawtooth hook, two sides are provided with sawtooth, and the middle hollow out of described fixing feet connecting rod forms observation window.
Above-mentioned internal fixing system for anterior cervical vertebrae, wherein, described fixing feet and fixing feet connecting rod are one-body molded.
Above-mentioned internal fixing system for anterior cervical vertebrae, wherein, described fixing feet connecting rod comprises two linking arms, and the mid portion of described two linking arms outwards opens formation observation window, and described two linking arms are positioned at same plane or outside dimpling is a globoidal structure.
Above-mentioned internal fixing system for anterior cervical vertebrae, wherein, the global shape of described fixing feet connecting rod be rhombus, ellipse, middle part band strut groove rhombus or middle part rounded.
Above-mentioned internal fixing system for anterior cervical vertebrae, wherein, the whole shape of cross section of described fixing feet is roughly circular inner side, outside rectangle, rectangle, square, trapezoidal or circular inner side, outside is trapezoidal.
Above-mentioned internal fixing system for anterior cervical vertebrae, wherein, the other end of described fixing feet is rectangular pyramid.
Above-mentioned internal fixing system for anterior cervical vertebrae, wherein, the material of described fixing feet and fixing feet connecting rod is more than 99% high purity magnesium or the magnesium alloy of purity.
Above-mentioned internal fixing system for anterior cervical vertebrae, wherein, described magnesium alloy is ZK60, MB2, AZ31 or M15 magnesium alloy.
Above-mentioned internal fixing system for anterior cervical vertebrae, wherein, that the surface-coated of described fixing feet and fixing feet connecting rod has is siliceous, the bioactivity coatings of calcium, phosphorus or its combination in any.
Above-mentioned internal fixing system for anterior cervical vertebrae, wherein, the thickness of described silicon bioactivity coatings is 5-60 μ m.
Utility model this utility model contrast prior art has following beneficial effect: the internal fixing system for anterior cervical vertebrae that technical solutions of the utility model provide, thereby inside fixing feet connecting rod the middle part of observation window apply and outwards strut power in two fixing feet make its constantly compression to the inside realize single segmental cervical vertebra played to the fixing effect of pressurization, meet cervical vertebrae physiological construction features, stickiness well also can realize effectively strong fixing, remove loaded down with trivial details installation steps and nut secured adjusted time from, there is operating time short, alleviate patient's misery, reduce patient and doctor's roentgenization time and operation wound little, with common nail-plate systematic comparison, fixing by pressurizeing, small elasticity contributes to the advantages such as healing in early stage of bone.Particularly this utility model adopts degradable magnesium and magnesium alloy materials and processes one internal fixing system for anterior cervical vertebrae, and along with symphysis, magnesium alloy is constantly degraded, and without second operation, takes out; The materials such as magnesium alloy modular ratio titanium alloy, rustless steel more approach body bone tissue, reduce stress-shielding effect; And Mg alloy surface is prepared biological activity containing silicon coating, can effectively control the degradation speed of magnesium alloy; Use the mode of one machine-shaping; Avoided completely screw separated with steel plate may, more can there is not the risk that esophagus etc. is deviate from separately, damaged to screw from steel plate; One machine-shaping has realized again the performance of steel plate and the degraded of screw Integral synchronous, effectively realize the high strength fixed function in early stage after anterior cervical vertebrae system is implanted, can within the time of setting, there is whole degraded again, the effectively growth of conduction bone, reduce patient's foreign body sensation, final degraded, the cervical vertebra bone injury completely of realizing recovered completely.
Accompanying drawing explanation
In Fig. 1, (a) and (b), (c), (d) are front view, left view, top view and the perspective view of the internal fixing system for anterior cervical vertebrae of this utility model embodiment rectangle fixing feet and oval connecting rod;
In Fig. 2, (a) and (b), (c), (d) are front view, left view, top view and the perspective view of the internal fixing system for anterior cervical vertebrae of this utility model embodiment outside circular inner side rectangle fixing feet and oval connecting rod;
(a) and (b) in Fig. 3, (c), (d) are for this utility model embodiment rectangle fixing feet with front view, left view, top view and the perspective view of the internal fixing system for anterior cervical vertebrae of the oval connecting rod of dimpling arc;
(a) and (b) in Fig. 4, (c), (d) are for this utility model embodiment outside circular inner side rectangle fixing feet with front view, left view, top view and the perspective view of the internal fixing system for anterior cervical vertebrae of the oval connecting rod of dimpling arc;
In Fig. 5, (a) and (b), (c), (d) are front view, left view, top view and the perspective view of the internal fixing system for anterior cervical vertebrae of this utility model embodiment rectangle fixing feet and circular connecting rod;
In Fig. 6, (a) and (b), (c), (d) are front view, left view, top view and the perspective view of the internal fixing system for anterior cervical vertebrae of this utility model embodiment outside circular inner side rectangle fixing feet and circular connecting rod;
(a) and (b) in Fig. 7, (c), (d) are for this utility model embodiment rectangle fixing feet with front view, left view, top view and the perspective view of the internal fixing system for anterior cervical vertebrae of the circular connecting rod of dimpling arc;
(a) and (b) in Fig. 8, (c), (d) are for this utility model embodiment outside circular inner side rectangle fixing feet with front view, left view, top view and the perspective view of the internal fixing system for anterior cervical vertebrae of the circular connecting rod of dimpling arc;
In Fig. 9, (a) and (b), (c), (d) are front view, left view, top view and the perspective view of the internal fixing system for anterior cervical vertebrae of this utility model embodiment rectangle fixing feet and link in rhomb form;
In Figure 10, (a) and (b), (c), (d) are front view, left view, top view and the perspective view of the internal fixing system for anterior cervical vertebrae of this utility model embodiment outside circular inner side rectangle fixing feet and link in rhomb form;
(a) and (b) in Figure 11, (c), (d) are for this utility model embodiment rectangle fixing feet with front view, left view, top view and the perspective view of the internal fixing system for anterior cervical vertebrae of the link in rhomb form of dimpling arc;
(a) and (b) in Figure 12, (c), (d) are for this utility model embodiment outside circular inner side rectangle fixing feet with front view, left view, top view and the perspective view of the internal fixing system for anterior cervical vertebrae of the link in rhomb form of dimpling arc;
Figure 13 is the shape schematic diagram of fixing feet connecting rod in this utility model embodiment;
Figure 14 is the whole shape of cross section schematic diagram of fixing feet in this utility model embodiment;
Figure 15 (a) and (b) are this utility model internal fixing system for anterior cervical vertebrae effect schematic diagram before and after cervical vertebra struts pressurization;
Figure 16 (a) and (b) are the stressed schematic diagram that this utility model internal fixing system for anterior cervical vertebrae struts the rear fixing feet connecting rod of pressurization, fixing feet;
Figure 17 is this utility model internal fixing system for anterior cervical vertebrae preparation flow schematic diagram;
Figure 18 is surface topography and the face coat energy spectrogram of the siliceous bioactivity coatings of Mg alloy surface;
Figure 19 is the electrokinetic potential polarization curve before and after MB2 magnesium alloy coating.
In figure:
1 fixing feet 2 fixing feet connecting rod 3 observation windows
4 end 5 sawtooth hook 6 sawtooth
7 linking arms
The specific embodiment
Below in conjunction with drawings and Examples, the utility model will be further described.
In Fig. 1, (a) and (b), (c), (d) are front view, left view, top view and the perspective view of the internal fixing system for anterior cervical vertebrae of this utility model embodiment rectangle fixing feet and oval connecting rod.
Refer to Fig. 1, the internal fixing system for anterior cervical vertebrae that this utility model provides comprises the fixing feet 1 of pair of opposing, one end of a pair of fixing feet 1 is connected by fixing feet connecting rod 2, the other end 4 of fixing feet 1 is tapered, the medial surface of fixing feet 1 is provided with sawtooth hook 5, two sides are provided with sawtooth 6, and the middle hollow out of fixing feet connecting rod 2 forms observation window 3.
The internal fixing system for anterior cervical vertebrae that this utility model provides, its fixing feet 1 and fixing feet connecting rod 2 adopt degradation material high purity magnesium or magnesium alloy; As magnesium alloys such as 99.999% pure magnesium or ZK60, MB2, AZ31 or M15.That the surface-coated of fixing feet 1 and fixing feet connecting rod 2 has is siliceous, the bioactivity coatings (not shown) of calcium, phosphorus or its combination in any, and the thickness of described bioactivity coatings is 5-60 μ m.Can effectively control the degradation speed of magnesium alloy.Due to the vivo degradation performance of magnesium uniqueness, can avoid second operation to take out, alleviate patient's misery; Magnesium is the interior cation of cell that is only second to potassium in human body, and human body requirement is large, and everyone the daily requirement amount of being grown up surpasses 350mg.The magnesium ion that magnesium alloy discharges is not only harmless, or the common factor of numerous enzymes, be again the key element of energy transhipment, storage and utilization, can regulate, stablize the structure of RNA and DNA, for regulating the growth of cell and maintaining membrane structure, play an important role; Excessive magnesium can excrete by urine, has good safety.Compare with titanium alloy, rustless steel, medical magnesium alloy material has better biomechanical compatibility, and elastic modelling quantity is about 45GP, and close to people's bone (10-30GP), stress shield effect is little; Density is at 1.7-1.9g/cm
3left and right, with people's compact bone bone density (l.75g/cm
3) close, far below the density (4.47g/cm of Ti6Al4V
3); Its specific strength, specific stiffness are higher, and processing characteristics is good, meets the mechanical property requirements of desirable blade plate; In addition, magnesium also has the effect of bone conduction.But because the degraded of magnesium can cause magnesium ion isoconcentration in blood to increase, therefore control the degraded of magnesium alloy, making magnesium ion concentration is particularly important at the acceptable zone of reasonableness of human body, and surface modification control degradation speed is a kind of good method.
The internal fixing system for anterior cervical vertebrae that this utility model provides, its fixing feet 1 and fixing feet connecting rod 2 can be one-body molded; Avoided completely screw separated with steel plate may, more can there is not the risk that esophagus etc. is deviate from separately, damaged to screw from steel plate; In addition anatomical form, can pressure structure design meet cervical vertebrae physiological construction features, stickiness get well and is realized effective strong fixing; One machine-shaping has realized again the performance of steel plate and the degraded of screw Integral synchronous, effectively realize the high strength fixed function in early stage after anterior cervical vertebrae system is implanted, can within the time of setting, there is whole degraded again, the effectively growth of conduction bone, reduce patient's foreign body sensation, final degraded, the cervical vertebra bone injury completely of realizing recovered completely.In addition, also can remove loaded down with trivial details installation steps and nut secured adjusted time from, there is operating time short, alleviate patient's misery, reduce patient and doctor's roentgenization time and operation wound is little, with common nail-plate systematic comparison, by fixing, the small elasticity of pressurizeing, contribute to the advantages such as healing in early stage of bone.
The internal fixing system for anterior cervical vertebrae that this utility model provides, its fixing feet connecting rod 2 comprises two linking arms 7, article two, the mid portion of linking arm 7 outwards open form 3, two linking arms 7 of observation window be positioned at same plane (as shown in Figure 1, Figure 2, shown in Fig. 5, Fig. 6, Fig. 9 and Figure 10) or outwards dimpling be a globoidal structure (as shown in Fig. 3, Fig. 4, Fig. 7, Fig. 8, Figure 11 and Figure 12).This fixed system has spring function, thereby can softenedly play the fixing effect of pressurizeing of single segmental cervical vertebra.Differential of the arc face structural design is in order to allow this fixed system better fit in cervical vertebra, thereby human body is dropped to minimum to the foreign body sensation after implanting, the global shape of fixing feet connecting rod 2 is that rhombus (as shown in Fig. 9-12 and Figure 13 (a)), oval (as shown in Fig. 1-Fig. 4 and Figure 13 (b)), middle part band strut groove rhombus (as shown in Figure 13 (c)) or middle part rounded (as shown in Fig. 5-Fig. 8 and Figure 13 (d)).
The internal fixing system for anterior cervical vertebrae that this utility model provides, the end 4 of its fixing feet 1 is preferably rectangular pyramid, and the whole shape of cross section of fixing feet 1 is roughly trapezoidal (as shown in Figure 14 (e)) inside circular inner side, outside rectangle (as shown in Fig. 2, Fig. 4, Fig. 6, Fig. 8, Figure 10, Figure 12 and Figure 14 (a)), rectangle (as shown in Fig. 1, Fig. 3, Fig. 5, Fig. 7, Fig. 9, Figure 11 and Figure 14 (b)), square (as shown in Figure 14 (c)), trapezoidal (as shown in Figure 14 (d)) or outside circle.
The internal fixing system for anterior cervical vertebrae that this utility model provides, concrete structural design, by changing fixing feet 1 and fixing feet connecting rod 2 shapes, specifically, as shown in Fig. 1-12, describes respectively below:
In Fig. 1, the shape of cross section of fixing feet 1 is rectangle, and fixing feet connecting rod 2 integral body are oval, and as shown in Fig. 1 (a), the end 4 of fixing feet is rectangular pyramid; Fixing feet connecting rod 2 comprises that the mid portion of 7, two linking arms 7 of two linking arms outwards opens 3, two linking arms 7 of formation observation window and is positioned at same plane.
Design in Fig. 2 and Fig. 1 is basic identical, and the shape of cross section of fixing feet 1 that different is is rectangle inside the circle of outside, as shown in Figure 2 (a) shows.
Design in Fig. 3 and Fig. 1 is basic identical, and different is that fixing feet connecting rod 2 has the design of dimpling arc, and two outside dimplings of linking arm 7 are a globoidal structure, as shown in Fig. 3 (b).
Design in Fig. 4 and Fig. 2 is basic identical, and different is that fixing feet connecting rod 2 has the design of dimpling arc, similarly, forms the outside dimpling of fixing feet connecting rod 2 and is a globoidal structure, by two linking arms 7 as shown in Fig. 4 (b).
In Fig. 5, the shape of cross section of a pair of fixing feet 1 is rectangle, and as shown in Fig. 5 (a), the end 4 of fixing feet is for rectangular pyramid designs, and there is sawtooth hook 5 inner side, and two sides are sawtooth 6; Fixing feet connecting rod 2 middle parts are circular design, and fixing feet connecting rod 2 comprises that the mid portion of 7, two linking arms 7 of two linking arms outwards opens 3, two linking arms 7 of formation observation window and is positioned at same plane.
In Fig. 6 with Fig. 5 in design basic identical, the shape of cross section of fixing feet 1 that different is is rectangle inside the circle of outside, as shown in Figure 6 (a).
Design in Fig. 7 and Fig. 5 is basic identical, and different is that fixing feet connecting rod 2 has the design of dimpling arc, as shown in Fig. 7 (b).
Design in Fig. 8 and Fig. 6 is basic identical, and different is that fixing feet connecting rod 2 has the design of dimpling arc, as shown in Fig. 8 (b).
In Fig. 9, the cross section of a pair of fixing feet 1 is rectangular design, fixing feet connecting rod 2 is whole to be designed for rhombus, as shown in Fig. 9 (a), the end 4 of fixing feet is rectangular pyramid, it is sawtooth 6 that there are sawtooth hook 5, two sides in inner side, and fixing feet connecting rod 2 comprises two linking arms 7, the mid portion of described two linking arms 7 outwards opens and forms observation window 3, and described two linking arms 7 are positioned at same plane.
Embodiment in Figure 10 and the embodiment in Fig. 9 design basic identical, and the cross sectional shape of fixing feet 1 that different is is the design of rectangle inside the circle of outside, as shown in Figure 10 (a).
Embodiment in Figure 11 and the embodiment in Fig. 9 design basic identical, and different is that fixing feet connecting rod 2 has the design of dimpling arc, as shown in Figure 11 (b).
Embodiment in Figure 12 and the embodiment in Figure 10 design basic identical, and different is that fixing feet connecting rod 2 has the design of dimpling arc, as shown in Figure 12 (b).
Figure 15 (a) and (b) are this utility model internal fixing system for anterior cervical vertebrae effect schematic diagram before and after cervical vertebra struts pressurization; Figure 16 (a) and (b) are the stressed schematic diagram that this utility model internal fixing system for anterior cervical vertebrae struts the rear fixing feet connecting rod of pressurization, fixing feet.
Refer to Figure 15 and 16, the internal fixing system for anterior cervical vertebrae that this utility model provides in use, thereby the middle part by observation window inside fixing feet connecting rod apply outwards strut power in two fixing feet make its constantly compression to the inside realize single segmental cervical vertebra played to the fixing effect of pressurization.
Figure 17 is this utility model internal fixing system for anterior cervical vertebrae preparation flow schematic diagram.
Please continue referring to Figure 17, the preparation method of the internal fixing system for anterior cervical vertebrae that this utility model provides comprises the steps:
Step S1: high purity magnesium or the machine-shaping of magnesium alloy one are formed to fixing feet 1 and fixing feet connecting rod 2; On slow wire feeding cutting processing equipment, one is processed to form fixing feet 1 and fixing feet connecting rod 2, and can grind the fixing feet 1 after excision forming and fixing feet connecting rod 2, polishing and cleaning treatment.
Step S2: the fixing feet after machined molding and surface clean 1 and 2 placements of fixing feet connecting rod are immersed in the mixed solution of siliceous salt; The mixed solution of stating siliceous salt is Na
2siO
39H
2o, Na
3pO
412H
2the mixed liquor of O and NaF, Na
2siO
39H
2o, Na
3pO
412H
2o, KF and (CH
3cOO)
2caH
2the mixed liquor of O or K
2siO
39H
2o, K
3pO
412H
2the mixed liquor of O and NaF.
Step S3: adopt micro-plasma oxidation equipment, by adjusting voltage and processing time,, calcium siliceous at the Surface Creation of fixing feet and fixing feet connecting rod is or/and the bioactivity coatings of phosphorus; By adjusting voltage (450-500V) and soak time (1-30Min), prepare different-thickness bioactivity coatings (5-60 μ m), to control magnesium degradation time.As shown in figure 18, the abscissa of Figure 18 represents energy, unit is KeV, vertical coordinate represents the intensity of X ray, unit is KCnt, good from the known coating uniformity consistency of coating surface shape appearance figure, can show that coating is mainly comprised of silicon, oxygen, magnesium elements by spectrogram, contain a small amount of fluorine, sodium element, large quantity research shows can significantly improve biological activity containing silicon coating, therefore silicon bioactivity coatings of the present utility model has good biological activity, and adopts plasma technology, and anchoring strength of coating of the present utility model is high.As shown in figure 19, abscissa Current is corrosion current density, and vertical coordinate Potential is corrosion potential, and unit is volt, curve 1 is polarization curve before coating, curve 2 is coating after-polarization curve, from polarization curve, analyzes decay resistance, before and after contrast coating, corrosion potential is from bring up to-1.310V of a 1.491V, corrosion current density obviously declines, and shows that corrosion resistance obviously improves, and shows that degradation property can be controlled.
Provide several concrete embodiments below:
Embodiment 1
Adopt three-dimensional software to design above-mentioned one internal fixing system for anterior cervical vertebrae contour structures, use the machine-shaping on the silk thread cutting processing equipment of being careful of MB2 magnesium alloy materials, then grind, polishing, cleaning be standby.At specific 14g/l Na
2siO
39H
2o, 1g/l Na
3pO
412H
2in O, 0.5g/l NaF mixed solution, use plasma oxidation equipment under 470V voltage, to process 5 minutes, prepare thickness and be 15 microns containing silicon coating.
Embodiment 2
Adopt three-dimensional software to design above-mentioned one internal fixing system for anterior cervical vertebrae contour structures, use the machine-shaping on the silk thread cutting processing equipment of being careful of pure magnesium material, then grind, polishing, cleaning be standby.At specific 12g/lNa
2siO
39H
2o, 0.5g/l Na
3pO
412H
2o, 0.5g/l KF, 11g/l (CH
3cOO)
2caH
2in O mixed solution, use plasma oxidation equipment under 450V voltage, to process 6 minutes, prepare thickness and be 10 microns containing silicon coating.
Embodiment 3
Adopt three-dimensional software to design above-mentioned one internal fixing system for anterior cervical vertebrae contour structures, use the machine-shaping on the silk thread cutting processing equipment of being careful of MB15 magnesium alloy materials, then grind, polishing, cleaning be standby.At 15g/l K
2siO
39H
2o, 2g/l K
3pO
412H
2in O, 0.5g/l NaF mixed solution, use plasma oxidation equipment under 500V voltage, to process 15 minutes, prepare thickness and be 35 microns containing silicon coating.
Although this utility model discloses as above with preferred embodiment; so it is not in order to limit this utility model; any those skilled in the art; within not departing from spirit and scope of the present utility model; when doing a little modification and perfect, therefore protection domain of the present utility model is worked as with being as the criterion that claims were defined.
Claims (10)
1. an internal fixing system for anterior cervical vertebrae, it is characterized in that, the fixing feet (1) that comprises pair of opposing, one end of described a pair of fixing feet (1) is connected by fixing feet connecting rod (2), the other end of described fixing feet (1) is tapered, the medial surface of described fixing feet (1) is provided with sawtooth hook (5), and two sides are provided with sawtooth (6), and the middle hollow out of described fixing feet connecting rod (2) forms observation window (3).
2. internal fixing system for anterior cervical vertebrae as claimed in claim 1, is characterized in that, described fixing feet (1) and fixing feet connecting rod (2) are one-body molded.
3. internal fixing system for anterior cervical vertebrae as claimed in claim 1, it is characterized in that, described fixing feet connecting rod (2) comprises two linking arms (7), the mid portion of described two linking arms (7) outwards opens and forms observation window (3), and described two linking arms (7) are positioned at same plane or outside dimpling is a globoidal structure.
4. internal fixing system for anterior cervical vertebrae as claimed in claim 3, is characterized in that, the global shape of described fixing feet connecting rod (2) be rhombus, ellipse, middle part band strut groove rhombus or middle part rounded.
5. internal fixing system for anterior cervical vertebrae as claimed in claim 1, is characterized in that, the whole shape of cross section of described fixing feet (1) is roughly circular inner side, outside rectangle, rectangle, square, trapezoidal or circular inner side, outside is trapezoidal.
6. internal fixing system for anterior cervical vertebrae as claimed in claim 5, is characterized in that, the other end of described fixing feet is rectangular pyramid.
7. internal fixing system for anterior cervical vertebrae as claimed in claim 1, is characterized in that, the material of described fixing feet (1) and fixing feet connecting rod (2) is more than 99% high purity magnesium or the magnesium alloy of purity.
8. internal fixing system for anterior cervical vertebrae as claimed in claim 7, is characterized in that, described magnesium alloy is ZK60, MB2, AZ31 or M15 magnesium alloy.
9. internal fixing system for anterior cervical vertebrae as claimed in claim 1, is characterized in that, that the surface-coated of described fixing feet (1) and fixing feet connecting rod (2) has is siliceous, the bioactivity coatings of calcium, phosphorus or its combination in any.
10. internal fixing system for anterior cervical vertebrae as claimed in claim 9, is characterized in that, the thickness of described silicon bioactivity coatings is 5-60 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420149328.5U CN203802555U (en) | 2014-03-28 | 2014-03-28 | Fixing system in anterior cervical spine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420149328.5U CN203802555U (en) | 2014-03-28 | 2014-03-28 | Fixing system in anterior cervical spine |
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| Publication Number | Publication Date |
|---|---|
| CN203802555U true CN203802555U (en) | 2014-09-03 |
Family
ID=51441372
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420149328.5U Expired - Lifetime CN203802555U (en) | 2014-03-28 | 2014-03-28 | Fixing system in anterior cervical spine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104367402A (en) * | 2014-11-12 | 2015-02-25 | 杨述华 | Self-stabilizing cervical interbody fusion cage and manufacturing die and method thereof |
| CN104939901A (en) * | 2014-03-28 | 2015-09-30 | 上海微创骨科医疗科技有限公司 | Cervical anterior fixation system and manufacturing method thereof |
| CN104970873A (en) * | 2015-07-07 | 2015-10-14 | 创辉医疗器械江苏有限公司 | Connecting rod with stiffness changeable |
-
2014
- 2014-03-28 CN CN201420149328.5U patent/CN203802555U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104939901A (en) * | 2014-03-28 | 2015-09-30 | 上海微创骨科医疗科技有限公司 | Cervical anterior fixation system and manufacturing method thereof |
| WO2015144010A1 (en) * | 2014-03-28 | 2015-10-01 | 上海微创骨科医疗科技有限公司 | Anterior cervical internal fixation system and preparation method therefor |
| CN104367402A (en) * | 2014-11-12 | 2015-02-25 | 杨述华 | Self-stabilizing cervical interbody fusion cage and manufacturing die and method thereof |
| CN104367402B (en) * | 2014-11-12 | 2017-01-25 | 杨述华 | Self-stabilizing cervical interbody fusion cage and manufacturing die and method thereof |
| CN104970873A (en) * | 2015-07-07 | 2015-10-14 | 创辉医疗器械江苏有限公司 | Connecting rod with stiffness changeable |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181217 Address after: 215000 Factory Building B, No. 112 Fangzhong Street, Suzhou Industrial Park, Jiangsu Province Patentee after: SUZHOU MINIMALLY INVASIVE SPINAL TRAUMA MEDICAL TECHNOLOGY CO.,LTD. Address before: 201318 twenty-third, 1-28 Lane 588, Tian Xiong Road, Zhou Pu town, Pudong New Area, Shanghai Patentee before: Shanghai Microport Orthopedics Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140903 |