CN209091597U - Magnesium alloy bone plate - Google Patents
Magnesium alloy bone plate Download PDFInfo
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- CN209091597U CN209091597U CN201820017773.4U CN201820017773U CN209091597U CN 209091597 U CN209091597 U CN 209091597U CN 201820017773 U CN201820017773 U CN 201820017773U CN 209091597 U CN209091597 U CN 209091597U
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- plate body
- magnesium alloy
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- bone
- pit
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Abstract
A kind of magnesium alloy bone plate of the utility model, the plate body including being provided at least two bone screw holes, the plate body include the matrix of magnesium alloy material and the povidone iodine coating in matrix surface cold spraying formation.Bone plate density and elasticity according to the utility model is closer with natural bone, and coating is simpler compared to coating preparation method, it is easier to which given thickness sets medicine layer needed for being formed.
Description
Technical field
The utility model relates to a kind of magnesium alloy bones plate.
Background technique
For internal fixation material used in clinic often based on titanium alloy material, which has excellent corrosion resistant at present
Corrosion energy and mechanical property, but its biocompatibility is poor, expensive, density and elasticity differ larger with natural bone, easy
Stress shielding phenomenon is caused, the growth of bone tissue is influenced and extends healing time.
In addition, interior fixed implanted medical device usually induces the generation of infection, lead to operative failure, serious person leads to limbs
Lose or even threat to life, and if Formulations for systemic administration, there are affected area drug concentration is too low, to liver, kidney, ear etc. other
There are the risks of latent lesion for histoorgan.Therefore, it carries out setting medicine on such as bone plate being current more commonly used way.
Such as Chinese patent literature CN204562348U, setting carries drug hole and carries drug reservoir on bone plate ontology, benefit
With carrying drug hole and carrying a certain amount of drug of drug storage function storage of drug reservoir, to promote the reparation of bone.However, although this
Kind mode solves the problems, such as drug storage, but the setting of load drug hole and load drug reservoir can make the shearing resistance section factor of bone plate ontology
It changes, and stress can be generated in the place for being provided with hole or slot and concentrated, and influence the overall mechanical properties of bone plate.
In addition, carry drug hole and carry drug reservoir no matter be distributed how uniformly, can not all accomplish really uniformly, drug only can be from example
As gradually become smaller at hole to extracellular concentration.
In view of this, can the prepares coating on bone plate or it is other kinds of set medicine layer by way of solve synthetism
The problem of onboard medicine uniformity, such as Chinese patent literature CN102416202A, to using titanium and titanium alloy as the synthetism of ontology
Plate carries out anodized in electrolyte containing Iodophor, and surface forms one layer containing iodine, high adherency, porous anodic oxidation
Film, to obtain anti-microbial property.Its antibacterial mechanisms is that anode oxide film can be with slow release iodide ion, to effectively inhibit material
The bacterial reproduction of surrounding and surface.Using titanium or titanium alloy as matrix, as previously mentioned, can exist it is at high cost, density be elasticity with
Natural bone differs bigger situation.And based on plating, it is relative complex from the point of view of technological angle, and with the deposition of coating,
Plating process will receive inhibition, can not often obtain relatively thick coating in a relatively short period of time.
Utility model content
The purpose of this utility model is to provide a kind of magnesium alloy bone plate for being loaded with povidone iodine coating, the bone plate is close
Degree and elasticity are closer with natural bone, and coating is simpler compared to coating preparation method, it is easier to given thickness needed for being formed
Degree sets medicine layer.
According to the embodiments of the present invention, a kind of magnesium alloy bone plate is provided, including being provided at least two bone screw holes
Plate body, the plate body include the matrix of magnesium alloy material and the povidone iodine coating in matrix surface cold spraying formation.
Above-mentioned magnesium alloy bone plate, optionally, plate body is bar part, is equipped with otic placode on the both sides of bar part；
Bone screw holes include the end bone screw holes that plate body both ends are arranged in and the side seam nail hole being arranged on otic placode.
Optionally, in the length direction of plate body, side seam nail hole is successively arranged alternately on the both sides of plate body.
Optionally, multiple pit arrays are formed in plate body front and back.
Optionally, it is provided with auxiliary hole between adjacent pit array, for adjusting the shearing resistance section factor of plate body in the longitudinal direction.
Optionally, the auxiliary hole between adjacent pit array is a pair, and corresponding two auxiliary hole separations are in plate body length direction
The two sides of section.
Optionally, pit array is line-column matrix；
Pit depth is not more than 1/7th of plate body plate thickness, and is not less than 1/10th of plate body plate thickness；
Pit bore is 1.5 ~ 2.5 times of pit depth.
According to the embodiments of the present invention, titanium or titanium alloy are substituted using magnesium alloy, the density of pure magnesium is 1.74g/
cm3, be in all metals with skeleton density (generally 1.75 g/cm3) immediate metal.The elasticity modulus of magnesium alloy
About twice of skeleton is more nearly less than the half of titanium alloy with the elasticity modulus of skeleton, being capable of effective link
Stress-shielding effect.In biomethanics, magnesium alloy is best suited for the material as bone plate.
In addition, magnesium is one of element needed by human, as long as controlling the degradation speed of magnesium alloy bone plate in kidney generation
Within the scope of thanking to ability, safety in utilization would not be led to the problem of.It should be noted that used in the present invention
Magnesium alloy is medical magnesium alloy, mainly includes WE43, AZ31, Mg-Ca, MgZnCa, engineering properties is also all relatively.
In the embodiments of the present invention, it also is being coated with povidone iodine using magnesium or magnesium alloy as the surface of matrix,
And coating is formed, coating layer thickness can be adjusted according to process conditions, be limited by technique itself smaller, however, it would be possible to
The coating of various thickness needed for forming, technological flexibility are more preferable.
And povidone iodine is a kind of disinfection sanitizer of wide spectrum, the sustained release of the sterilizing of povidone iodine and magnesium alloy can be with
Respectively play respective advantage.In addition, screening povidone iodine by inventor is to compare to can adapt to spray in disinfection sanitizer
The drug of technique, cold spray process are also smaller to the detraction of medicine effect.
Detailed description of the invention
Fig. 1 is magnesium alloy bone plate schematic perspective view in an embodiment.
Fig. 2 is a kind of magnesium alloy bone plate schematic view of the front view.
Fig. 3 is the A-A cross-sectional view of Fig. 2.
Fig. 4 is the B-B cross-sectional view of Fig. 2.
Fig. 5 is the portion the I enlarged drawing of Fig. 3.
Fig. 6 is the portion the II enlarged drawing of Fig. 4.
Fig. 7 is a kind of backsight structural representation of magnesium alloy bone plate.
In figure: 1. plate bodys, 2. back side pits, 3. auxiliary holes, 4. end bone screw holes, 5. pick up the ears, 6. side fixation holes, 7. counterbores, and 8.
Front pit.
11. matrix, 12. coatings.
Specific embodiment
According to the embodiments of the present invention, it is further processed using conventional magnesium alloy bone plate as matrix 11,
Content above-mentioned is accepted, magnesium alloy herein is the magnesium alloy for capableing of support bone plate, belong to one kind of medical magnesium alloy, about
The component that matrix 11 is made of known elements or known material no longer carries out volume for material itself in the present invention
Outer explanation.
On magnesium alloy bone plate shown in Fig. 1, it is about elongate in shape, and there is certain curvature, the curvature table
Now on the face perpendicular with the length direction of elongate in shape, generally for matching the structure of bone contours physiological camber.
It is provided with several bone screw holes on the plate body 1 of bone plate shown in Fig. 1, had both included positioned at the end of synthetism board ends in figure
Bone screw holes 4 also include the side seam nail hole 6 positioned at bone plate two sides, for fixation of the plate body 1 on bone.
Wherein plate body 1 is equivalent on traditional magnesium or the bone plate of magnesium alloy material and increases a figure layer, such as
Shown in Figures 5 and 6, povidone iodine coating is formed by cold spray process in magnesium or the matrix of magnesium alloy material 11, i.e., as shown in the figure
Coating 12.
Cold spray process be different from electroplating technology, electroplating technology with coating thickening, by coating material and basic material
The difference of property will lead to coating and be difficult to accomplish that comparison is thick.And cold spray process is then different, the compatibility of institute's coating materials itself
More preferably, it is easily formed relatively thick stenlizing layer.And the speed of cold spraying is related with the technological parameter of cold spraying, with matrix 11
Property relationship it is little.
Povidone iodine belongs to wide spectrum disinfective agent, and can be sustained in the coating, therefore, according to its slow releasing function,
The coating to form given thickness can be sprayed, to adapt to the different courses for the treatment of.
Referring to Figure of description 1 ~ 3 and 7, as it can be seen that the main outline of plate body 1 is bar part, in its length direction in figure
Two sides are set there are four picking up the ears 5, and are picking up the ears to be provided with side seam nail hole 6 on 5.
Visible in fig. 2, the presence meeting of side seam nail hole 6 is so that be distributed in the pit on 1 surface of plate body, such as 2 He of back side pit
Front pit 8 is distributed relatively uniform, i.e., does not influence it and set medicine.
In addition, 5 being extended outwardly certain distance by picking up the ears, plate body 1 has relatively large equivalent span, fixation
Property can be more preferable.
If the side seam nail hole 6 for being located at 1 side of plate body is directly opened on strip structure part, to meet preferable fixed effect
Fruit needs to be adapted to the biggish width of plate body 1, cause it is larger to bone covering surface area, and influence blood fortune.
5 extended outwardly certain distance by picking up the ears, rather than increase the width of entire plate body 1, in the condition for saving materials
Under, the negative effect restored to bone is also relatively small.
Further, referring to Figure of description 2, can clearly find out in attached drawing 2, side seam nail hole 6 there are 4, but in cross
Not on a same row to, the two, but the certain distance that is staggered, be equivalent to side seam nail hole 6 and adopted in the longitudinal direction on plate body 1
It is arranged with the following methods:
One side seam nail hole 6 is set in side, the other side on 1 length direction of plate body to plate body 1 at set a distance is arranged
One side seam nail hole 6, and so on, side seam nail hole 6 is generated the case where the both sides of plate body 1 are successively alternately present.
In this way, the bone screw holes of side, are in triangular distribution between bone screw holes adjacent thereto with the other side, Neng Gouman
Fixed reliability enough, and in contrast, it is possible to reduce the open cell content of bone screw holes.
Merely with regard to attached drawing 2 from the point of view of, four side seam nail hole 6 are equivalent to four rows, according to traditional boring method, every row are needed to have
A pair, and in Fig. 2, then it is equivalent to every row one, reduces open cell content, difficulty of processing reduces, and decreases useful to plate body 1
The occupancy of area.
In addition, reducing the contact area of plate body and bone, to bone by the way of picking up the ears 5 side seam nail hole 6 is arranged
The blood fortune of bone influences smaller.
Further, as shown in Figures 2 and 4, multiple pit arrays are formed in 1 front and back of plate body, as shown in the figure
Back side pit 2 and front pit 8, on the one hand the presence of pit can reduce the contact area of plate body 1 Yu bone, with reduction pair
The influence of blood fortune.On the other hand, the presence of pit can increase the area of spraying, be conducive to deposit more povidone iodine.
It is all line-column matrix as it can be seen that pit has multiple arrays in the structure shown in Fig. 1,2 and 7, between adjacent pit array
It is provided with auxiliary hole 3, for adjusting the shearing resistance section factor of plate body 1 in the longitudinal direction, to reduce stress concentration, is mitigated to plate body 1
The influence of integral strength.
Auxiliary hole 3 is a pair between adjacent pit array, the corresponding two auxiliary separation of hole 3 sections in 1 length direction of plate body
Two sides.
Auxiliary hole 3 is through-hole, can reduce difficulty of processing, single side time processing.
For pit, as previously mentioned, needing it with certain aperture, to reduce the influence that plate body 1 transports blood, and its
Certain depth is needed to have, a certain amount of povidone iodine can be accommodated.One opposite factor is that pit depth is also not easy
It is excessive, it crosses conference and generates bigger flow resistance, spraying is also sprayed less than bottom hole, acted on without actual receiving.And pit depth
The excessive strength reduction that will lead to plate body 1 is larger, to sum up considerations above, and pit depth is not more than 1/7th of plate body plate thickness,
And it is not less than 1/10th of plate body plate thickness.
And for pit bore, it is 1.5 ~ 2.5 times of pit depth.
Pit, back side pit 2 and front pit 8 as shown in Fig. 1,2 and 4, are all circular pits.
In addition, as shown in figure 4, the bore in the relative aperture front awkward-sounding 8 of back side pit 2 is big, on the one hand for arcuate structure
Plate body 1, the back side have biggish area, are also suitable for out biggish pit, and on the other hand, the back side is not directly contacted with bone,
With biggish slow-release capability, therefore thicker coating 12 and the biggish accommodating ability to drug can be adapted to.
About magnesium alloy bone plate, mainly Degradable bone fracture plate, therefore, the bone nail being adapted to also uses degradable bone
Nail, from without taking out bone plate by second operation.
To the embodiment of magnesium alloy bone plate production side:
Embodiment 1:
The matrix 11 of magnesium alloy bone plate is pre-processed first, is mainly polished, clearly the surface of matrix 11
It washes and dries, roughening treatment then is carried out to matrix 11, to improve the bond strength of coating 12 Yu matrix 11.
Roughening treatment is that 11 surface of matrix uses granularity to carry out sandblasting roughening treatment for the quartz sand of 50 mesh.
Followed by the matrix 11 after roughening treatment is sprayed: using cold spray technique by particle diameters be 80 μm
Povidone iodine spray to the surface of matrix 11, can prepare and be loaded with povidone iodine coating magnesium alloy bone plate.
The technological parameter of spraying are as follows: working gas and powder feeding gas are N2, wherein air pressure and powder feeding gas
Pressure is respectively 1MPa and 1.5MPa, and working gas temperature is 100 DEG C, spray distance 20mm.
Thicknesses of layers is measured using TT260 coating thickness detector, suppressed zero before measuring.6 are equably selected in specimen surface
A test point, the thickness value averaged as coating 12 measure with a thickness of 300 μm.
Embodiment 2:
11 surface of matrix is pre-processed using method same as Example 1.
The povidone iodine that particle diameters are 120 μm is sprayed into 11 surface of matrix using cold spray technique, it can
Preparation is loaded with povidone iodine coating magnesium alloy bone plate.
The technological parameter of spraying are as follows: working gas and powder feeding gas are N2, wherein air pressure and powder feeding gas
Pressure is respectively 1.5MPa and 2MPa, and working gas temperature is 150 DEG C, spray distance 25mm.
Using identical method measure coating 12 with a thickness of 436 μm.
Embodiment 3:
Plate surface is pre-processed using method same as Example 1.
The povidone iodine that particle diameters are 150 μm is sprayed into 11 surface of matrix using cold spray technique, it can
Preparation is loaded with povidone iodine coating magnesium alloy bone plate.
The technological parameter of spraying are as follows: working gas and powder feeding gas are N2, wherein air pressure and powder feeding gas
Pressure is respectively 2MPa and 2.5MPa, and working gas temperature is 200 DEG C, spray distance 30mm.
Using identical method measure coating 12 with a thickness of 527 μm.
In conclusion the coating 12 of different thickness, technological flexibility ratio can be obtained by adjusting the technological parameter of spraying
Preferably.
Claims (7)
1. a kind of magnesium alloy bone plate, the plate body including being provided at least two bone screw holes, which is characterized in that the plate body includes magnesium
Or magnesium alloy material matrix and matrix surface cold spraying formed povidone iodine coating.
2. magnesium alloy bone plate according to claim 1, which is characterized in that plate body is bar part, in bar part
Both sides are equipped with otic placode；
Bone screw holes include the end bone screw holes that plate body both ends are arranged in and the side seam nail hole being arranged on otic placode.
3. magnesium alloy bone plate according to claim 2, which is characterized in that in the length direction of plate body, side seam nail hole exists
The both sides of plate body are successively arranged alternately.
4. magnesium alloy bone plate according to claim 3, which is characterized in that formed in plate body front and back multiple recessed
Cheat array.
5. magnesium alloy bone plate according to claim 4, which is characterized in that be provided with auxiliary hole between adjacent pit array, be used for
Adjust the shearing resistance section factor of plate body in the longitudinal direction.
6. magnesium alloy bone plate according to claim 5, which is characterized in that the auxiliary hole between adjacent pit array is a pair,
The two sides of corresponding two auxiliary hole separation sections in plate body length direction.
7. according to any magnesium alloy bone plate of claim 4 ~ 6, which is characterized in that pit array is line-column matrix；
Pit depth is not more than 1/7th of plate body plate thickness, and is not less than 1/10th of plate body plate thickness；
Pit bore is 1.5 ~ 2.5 times of pit depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820017773.4U CN209091597U (en) | 2018-01-05 | 2018-01-05 | Magnesium alloy bone plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820017773.4U CN209091597U (en) | 2018-01-05 | 2018-01-05 | Magnesium alloy bone plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209091597U true CN209091597U (en) | 2019-07-12 |
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ID=67146078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820017773.4U Expired - Fee Related CN209091597U (en) | 2018-01-05 | 2018-01-05 | Magnesium alloy bone plate |
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| CN (1) | CN209091597U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108186097A (en) * | 2018-01-05 | 2018-06-22 | 济南大学 | Magnesium alloy bone plate and production method |
-
2018
- 2018-01-05 CN CN201820017773.4U patent/CN209091597U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108186097A (en) * | 2018-01-05 | 2018-06-22 | 济南大学 | Magnesium alloy bone plate and production method |
| CN108186097B (en) * | 2018-01-05 | 2024-04-16 | 济南大学 | Magnesium alloy bone fracture plate and manufacturing method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190712 Termination date: 20200105 |
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| CF01 | Termination of patent right due to non-payment of annual fee |