CN204581475U - Biodegradable magnesium alloy claw type rib connecting plate - Google Patents
Biodegradable magnesium alloy claw type rib connecting plate Download PDFInfo
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- CN204581475U CN204581475U CN201520145649.2U CN201520145649U CN204581475U CN 204581475 U CN204581475 U CN 204581475U CN 201520145649 U CN201520145649 U CN 201520145649U CN 204581475 U CN204581475 U CN 204581475U
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- blade plate
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Abstract
This utility model provides a kind of biodegradable magnesium alloy claw type rib connecting plate, and described rib connecting plate comprises blade plate main body and holding claw, and described blade plate main body is provided with lock hole, and described holding claw is connected to blade plate main body both sides.This utility model can meet the mechanical property requirements of Fracture internal fixaiion, also can realize blade plate homogeneous corrosion degraded in vivo simultaneously, thus significantly reduce the misery of patient and postoperative long-term risk, and not need to do second operation.
Description
Technical field
This utility model relates to medical instruments field, is specifically related to a kind of biodegradable magnesium alloy claw type rib connecting plate.
Background technology
Rib connecting plate is because being conducive to lung expansion in treatment fracture of rib in recent years, and the healing of rib anatomical reduction and patient's early ambulant, recovery effects significantly has been widely recognized and promotes.
Rib bone connection panel material at present for clinical treatment fracture of rib is titanium alloy, rustless steel or marmem etc.Patent publication No. is the eight pawl rib connecting plates disclosing the manufacture of a kind of titanium alloy in the Chinese invention patent of CN203777033.Patent publication No. is disclose a kind of rib-shaped memory embracing bone plate in the Chinese invention patent of CN201533866.These metal bone fracture plates have certain mechanical strength, fixation can be reached reliable, para-position is effect accurately, but can not corrosion degradation in human body, need to carry out second operation, biocompatibility simultaneously owing to implanting blade plate is poor, causes being inflamed in postoperative patient body reaction, adds the misery of patient.
Magnesium alloy materials has good mechanical property and biocompatibility, and the catabolite material that to be body metabolism necessary, there is good biological safety.At present, report about magnesium alloy blade plate structural design is also few, patent publication No. is disclose a kind of magnesium alloy Fracture internal fixaiion metal embracing fixator in the Chinese invention patent of CN102100579, but its structure is similar to traditional clinical medical titanium alloy blade plate structure, the holding claw being positioned at fracture site does not carry out widening or thicken process, the blade plate holding claw of this traditional structure is not only not strong to the bed knife of fracture site, be unfavorable for the quickly-healing of fracture site, and it is too fast to there is corrosion in vivo, the problems such as local corrosion, blade plate is caused not give full play to the effect of its fixing fracture money and lose effect in advance, have a strong impact on clinical therapeutic effect.
Magnesium alloy materials mostly is close-packed hexagonal structure, there is obvious tension and compression unsymmetry in deformation process, makes magnesium alloy materials compared to titanium alloy and stainless steel material, shows lower plastic forming ability and poor pressure machining characteristics.The Medical bone fracture plate made with magnesium alloy materials carries out reduction processing on the thickness direction of holding claw bending place, is conducive to the tension and compression unsymmetry existed when alleviating magnesium alloy materials distortion, and the bending distortion be convenient to when performing the operation is fixing.
The corrosion degradation problem of magnesium alloy blade plate is mainly relevant with two aspects: material and residual stress.Select a kind of magnesium alloy materials that can realize homogeneous corrosion to be basis, and rib connecting plate residual stress distribution is in vivo evenly the essential condition that blade plate realizes evenly degraded.
Utility model content
For defect of the prior art, the purpose of this utility model is to provide a kind of biodegradable magnesium alloy claw type rib connecting plate, it can meet the mechanical property requirements of Fracture internal fixaiion, also can realize blade plate homogeneous corrosion degraded in vivo simultaneously, thus significantly reduce the misery of patient and postoperative long-term risk, and do not need to do second operation.
According to an aspect of the present utility model, a kind of biodegradable magnesium alloy claw type rib connecting plate is provided, described biodegradable magnesium alloy claw type rib connecting plate comprises blade plate main body and holding claw, and described blade plate main body is provided with lock hole, and described holding claw is connected to blade plate main body both sides.In operation process, doctor can use lock screw to be firmly fixed on rib by described blade plate by lock hole.
Preferably, the plane of described blade plate main body is rectangle.
Preferably, described lock hole is distributed on the midline position of described blade plate main body.
Preferably, distribute in pairs about described holding claw, often pair of holding claw is bent into arc all inwards; The epimere of described holding claw narrows from the width from plate body to bending part; The hypomere of described holding claw is trapezoidal from bending part to the end of nearly holding claw, and the end of holding claw can be semicircle, ellipse or its combination.
Preferably, described holding claw comprises main holding claw and auxiliary holding claw, and described auxiliary holding claw is positioned at the two ends of described blade plate main body, and described main holding claw is between described auxiliary holding claw.
Preferably, the width of described main holding claw is 1.5 ~ 3 times of the width of described auxiliary holding claw.
Preferably, the thickness of described main holding claw is 1.0 ~ 1.5 times of the thickness of described auxiliary holding claw.This rib being conducive to strengthening position near fracture line is fixed, and extends blade plate to the set time of fracture site, blade plate is strengthened the mechanics fixed effect of fracture site, is more conducive to the healing of patients with fractures's line.
Preferably, described blade plate main body is connected bending place inner surface and adopts reduction processing, thickness thinning 0% ~ 20% with holding claw, and the tension and compression unsymmetry existed when alleviating magnesium alloy materials bending distortion like this, so that better bend fixing during surgical.
Preferably, the thickness range of described blade plate is between 0.5mm ~ 3mm.
Compared with prior art, this utility model has following beneficial effect: fracture site is firmly held tightly by several auxiliary holding claw and main holding claw by this utility model blade plate, strengthen the mechanics fixed effect to knochenbruch position, the degraded of slow homogeneous corrosion can be realized after in blade plate patients with implantation body, its catabolite can induce the formation of new bone, promote the reparation of fracture site, alleviate the peripheral nerve of fracture site, the inflammatory reaction of muscular tissue simultaneously.After fracture site heals and has the mechanical strength of normal bone, blade plate main body and holding claw are degraded gradually and lose fixed effect, and blade plate is slowly degraded and finally absorbed by body.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present utility model will become more obvious:
Fig. 1 is the planar structure schematic diagram of this utility model biodegradable magnesium alloy claw type rib connecting plate.
Fig. 2 is the perspective view of this utility model biodegradable magnesium alloy claw type rib connecting plate.
Fig. 3 is the sectional view in the A-A direction along Fig. 1.
Fig. 4 is the sectional view in the B-B direction along Fig. 1.
Detailed description of the invention
Below in conjunction with specific embodiment, this utility model is described in detail.Following examples will contribute to those skilled in the art and understand this utility model further, but not limit this utility model in any form.It should be pointed out that to those skilled in the art, without departing from the concept of the premise utility, some distortion and improvement can also be made.These all belong to protection domain of the present utility model.
This tests the magnesium alloy plate preparation technology of novel use: diameter of phi 90mm length is the magnesium alloy ingot extruding of 400mm or rolls into wide 100-500mm, the sheet material of thickness 0.5-3mm by (1) at 400 DEG C.(2) above-mentioned sheet material is annealed 30 minutes, to remove internal stress at 350 DEG C.
Embodiment one: as shown in Figure 1 to Figure 4, Mg-Nd-Zn-Zr base magnesium alloy plate is made blade plate integral piece by the mode of machining, biodegradable magnesium alloy claw type rib connecting plate comprises blade plate main body 1 and holding claw, described blade plate main body is provided with lock hole 4, and described holding claw is connected to blade plate main body both sides.The plane of blade plate main body is rectangle.Lock hole is distributed on the midline position of described blade plate main body.Distribute in pairs about holding claw, often pair of holding claw is bent into arc all inwards; The epimere (3-1 in Fig. 1, dotted portion) of described holding claw narrows from the width from plate body to bending part; The hypomere (3-2 in Fig. 1) of described holding claw is trapezoidal from bending part to the end of nearly holding claw, and the end of holding claw can be semicircle, ellipse or its combination.Holding claw comprises main holding claw 2 and auxiliary holding claw 3, and described auxiliary holding claw is positioned at the two ends of described blade plate main body, and described main holding claw is between described auxiliary holding claw.The width of main holding claw is 1.5 times of the width of described auxiliary holding claw, the thickness of main holding claw is equal with the thickness of described auxiliary holding claw, this rib being conducive to strengthening position near fracture line is fixed, extend blade plate to the set time of fracture site, blade plate is strengthened the mechanics fixed effect of fracture site, is more conducive to the healing at patient's knochenbruch position.Blade plate main body is connected bending place inner surface and adopts reduction processing, thickness thinning 20% with holding claw.Blade plate main body and bending place, holding claw contact site inner surface are carried out circular arc reduction processing, and the tension and compression unsymmetry existed during to alleviate magnesium alloy materials bending distortion, bends fixing when being convenient to operation.Ultrasonic anti-dandruff, pickling and electrochemical polishing treatment etc. are carried out to this integral piece, three point bending test is carried out to blade plate, measures its mechanical property, its yield strength occurred when rupturing is 230MPa, plastic strain is 25%, carries out bending process to holding claw, and its bending angle scope is 90 °.The thickness range of blade plate is 3mm.
Embodiment two: composition graphs 1 illustrates the present embodiment, Mg-Nd-Zn-Zr base magnesium alloy is made blade plate integral piece by the mode of machining, and this utility model biodegradable magnesium alloy claw type rib connecting plate comprises blade plate main body 1, main holding claw 2, auxiliary holding claw 3 and lock hole 4.Wherein the width of main holding claw 2 is 3 times of the width of auxiliary holding claw 3, and the thickness of main holding claw 2 is 1.5 times of the thickness of auxiliary holding claw 3.Blade plate main body and bending place, holding claw contact site inner surface are carried out circular arc at thickness direction thinning, thickness thinning is 10%.Its mechanical property shows, and fracture strength is 220MPa, and plastic strain rate reaches 27%.Carry out bending process to holding claw, angle of bend is 110 °.The thickness range of blade plate is 0.5mm.
Embodiment three: composition graphs 3 and Fig. 4 illustrate present embodiment, the width of main holding claw 2 is 2 times of the width of auxiliary holding claw 3, and the thickness of main holding claw 2 is 1.2 times of the thickness of auxiliary holding claw 3.The material composition of present embodiment is Mg-Zn-Gd base magnesium alloy, length 55mm, width 19mm before blade plate implantation diseased region, and be highly 10mm, the width of main holding claw is 16mm, and thickness is 1.8mm; The width of auxiliary holding claw is 8mm, and thickness is 1.5mm.Blade plate main body and bending place, holding claw contact site inner surface adopt reduction processing, and thickness thinning is 5%.This blade plate fracture strength is 226MPa, and plastic strain rate is 26%, carries out bending process to holding claw, and angle of bend is 100 °.The thickness range of blade plate is 2mm.R represents the radius of curvature of outer surface after bending, and r represents the radius of curvature of blade plate main body and bending place, holding claw contact site inner surface.
Embodiment four: the blade plate of the present embodiment adopts eight pawl structures, wherein two two ends auxiliary holding claw being positioned to blade plate main body, two to main holding claw two to auxiliary holding claw between.The width of auxiliary holding claw is 7mm, and thickness is 1.2mm, and the width of main holding claw is 15mm, and thickness is 1.8mm.
Embodiment five: the blade plate surface-coated brushite coating of the present embodiment, improves blade plate degradation behavior in vivo and biocompatibility, can slowly evenly degrade.Blade plate main body and bending place, holding claw contact site inner surface do not carry out reduction processing.
This utility model thoroughly solves the problem can not degraded after the non-degradable rib connecting plates such as traditional titanium alloy implant fracture site, does not need to carry out second operation, greatly alleviates the misery of patient.Described magnesium alloy claw type rib connecting plate is made up of blade plate main body and several holding claw, blade plate main body is provided with several lock hole, be distributed on the center line of blade plate main body, in operation process, doctor can use screw to be firmly fixed on rib by described blade plate by lock hole.Fracture site annular is held tightly by holding claw by this blade plate, realizes the connection para-position to knochenbruch.Simultaneously, in patient's fracture site agglutination, blade plate can realize homogeneous corrosion degraded, and catabolite can induce the formation of new bone, decrease the time of healing, after fracture site recovers the mechanical strength of normal bone, blade plate holding claw stiff end just loses fixed effect, and blade plate is slowly evenly degraded and finally absorbed completely by body.
More than describe detailed description of the invention of the present utility model in detail.Should be appreciated that one of ordinary skilled in the art just can make many modifications and variations according to design of the present utility model without the need to creative work.Therefore, all technical staff in the art according to design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should by the determined protection domain of claims.
Claims (9)
1. a biodegradable magnesium alloy claw type rib connecting plate, it is characterized in that: described biodegradable magnesium alloy claw type rib connecting plate comprises blade plate main body and holding claw, described blade plate main body is provided with lock hole, and described holding claw is connected to blade plate main body both sides.
2. according to biodegradable magnesium alloy claw type rib connecting plate described in claim 1, it is characterized in that: the plane of described blade plate main body is rectangle.
3. according to biodegradable magnesium alloy claw type rib connecting plate described in claim 2, it is characterized in that: described lock hole is distributed on the midline position of described blade plate main body.
4., according to biodegradable magnesium alloy claw type rib connecting plate described in claim 1, it is characterized in that: distribute in pairs about described holding claw, often pair of holding claw is bent into arc all inwards; The epimere of described holding claw narrows from the width from plate body to bending part; The hypomere of described holding claw is trapezoidal from bending part to the end of nearly holding claw, and the end of holding claw is semicircle, oval or its combination.
5. according to biodegradable magnesium alloy claw type rib connecting plate described in claim 1, it is characterized in that: described holding claw comprises main holding claw and auxiliary holding claw, described auxiliary holding claw is positioned at the two ends of described blade plate main body, and described main holding claw is between described auxiliary holding claw.
6. according to biodegradable magnesium alloy claw type rib connecting plate described in claim 5, it is characterized in that: the width of described main holding claw is 1.5 ~ 3 times of the width of described auxiliary holding claw.
7. according to biodegradable magnesium alloy claw type rib connecting plate described in claim 5, it is characterized in that: the thickness of described main holding claw is 1.0 ~ 1.5 times of the thickness of described auxiliary holding claw.
8. according to biodegradable magnesium alloy claw type rib connecting plate described in claim 5, it is characterized in that: described blade plate main body is connected bending place inner surface and adopts reduction processing, thickness thinning 0% ~ 20% with holding claw.
9., according to biodegradable magnesium alloy claw type rib connecting plate described in claim 1, it is characterized in that: the thickness range of described blade plate is between 0.5mm ~ 3mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520145649.2U CN204581475U (en) | 2015-03-13 | 2015-03-13 | Biodegradable magnesium alloy claw type rib connecting plate |
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| CN201520145649.2U CN204581475U (en) | 2015-03-13 | 2015-03-13 | Biodegradable magnesium alloy claw type rib connecting plate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108742813A (en) * | 2018-05-28 | 2018-11-06 | 沪创医疗科技（上海）有限公司 | A kind of magnesium alloy bone fracture plate for breastbone |
| CN110897697A (en) * | 2019-12-04 | 2020-03-24 | 深圳爱司科技有限公司 | Fixing device with absorbable rib embracing plate |
| CN110897698A (en) * | 2019-12-04 | 2020-03-24 | 深圳爱司科技有限公司 | Fixing equipment with absorbable rib bone fracture plate |
| CN113679463A (en) * | 2021-10-26 | 2021-11-23 | 北京科技大学 | Surrounding type zinc alloy rib bone fracture plate, processing method and flexible forming device |
-
2015
- 2015-03-13 CN CN201520145649.2U patent/CN204581475U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108742813A (en) * | 2018-05-28 | 2018-11-06 | 沪创医疗科技（上海）有限公司 | A kind of magnesium alloy bone fracture plate for breastbone |
| CN110897697A (en) * | 2019-12-04 | 2020-03-24 | 深圳爱司科技有限公司 | Fixing device with absorbable rib embracing plate |
| CN110897698A (en) * | 2019-12-04 | 2020-03-24 | 深圳爱司科技有限公司 | Fixing equipment with absorbable rib bone fracture plate |
| CN110897698B (en) * | 2019-12-04 | 2020-11-06 | 深圳爱司科技有限公司 | Fixing equipment with absorbable rib bone fracture plate |
| CN113679463A (en) * | 2021-10-26 | 2021-11-23 | 北京科技大学 | Surrounding type zinc alloy rib bone fracture plate, processing method and flexible forming device |
| CN113679463B (en) * | 2021-10-26 | 2022-03-04 | 北京科技大学 | Surrounding type zinc alloy rib bone fracture plate, processing method and flexible forming device |
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Effective date of registration: 20190918 Address after: The new town of Pudong New Area Nanhui lake west two road 201306 Shanghai City No. 888 building C Patentee after: Huchuang Medical Technology (Shanghai) Co., Ltd. Address before: 200240 Dongchuan Road, Shanghai, No. 800, No. Patentee before: Shanghai Jiaotong University |