CN209422084U - Magnesium alloy fracture of tibia bone plate - Google Patents

Abstract

The utility model discloses a kind of magnesium alloy fracture of tibia bones plate, comprising: bone plate ontology, to adapt to shin bone body length direction and being provided with the batten of screw hole, and bone plate ontology is circumferentially the curved surface for being adapted to shin bone ontology physiological structure in shin bone ontology；Flank, continued access have odd number in the both sides of bone plate ontology, and the two sides interplane in each pair of flank is arranged symmetrically about section in bone plate ontology length；Wherein, bone plate ontology and flank surfaces are formed with the coating for being loaded with antibacterials；Flank is located in the middle in odd number flank to adapt at fracture.Magnesium alloy fracture of tibia bone plate according to the utility model is relatively good with shin bone binding ability and this bulk damage is smaller to shin bone.

Description

Magnesium alloy fracture of tibia bone plate

Technical field

The utility model relates to a kind of magnesium alloy fracture of tibia bones plate.

Background technique

Shin bone is one of double bones of shank, positioned at the inside of shank, restarts important function to support, is main in focile Load-bearing bone.One and both ends can be divided into, the upper end is commonly known as proximal end, and lower end is commonly known as distal end, wherein fracture of distal Belong to multiple fracture, the fracture of the diaphyseal portion between both ends belongs to shaft of tibia fracture, relatively fewer generation, the utility model Bone plate be used for the synthetism of shaft of tibia fracture, based on fixed within the fixation of fracture of tibia.

Inherently a kind of multiple fracture of fracture of tibia, accounts for about the 1/4 of whole body incidence of fracture.At present used in clinic Internal fixation material is often based on titanium alloy material, which has excellent corrosion resistance and mechanical property, but it is given birth to Object compatibility is poor, expensive, and density and elasticity with natural bone differ larger, is easy to produce stress shielding phenomenon, influences bone The growth of tissue, to extend 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.

For normal bone plate, such as Chinese patent literature CN108210050A, disclosed bone plate are in distal tibial Bone plate is flanked, with plate bodys flat and equipped with several screw holes, and is equipped with the liner for avoiding contacting firmly in screw hole, When being connected by screw on shin bone to bone plate, avoids screw and screw hole from rubbing and generate clast.Such bone plate belongs to It is poor to the pressure effect of shin bone along the flat construction of shin bone, it is insufficient with the binding ability of shin bone, therefore, used screw Quantity is relatively more.

Bone plate disclosed in Chinese patent literature CN207024109U is the binding ability improved with shin bone, on bone plate It is provided with the screw hole of three types, i.e. first kind lock hole determined by the first lock hole and the second lock hole, universal lock hole Identified second class lock hole, and third class lock hole determined by pressurization combined hole, the type in hole is more, and processing is cumbersome, It is at high cost, and need to be adapted to more screw, and increase the injury to shin bone.

In addition, the surface of bone plate and tibia contact is bone plate matrix face, and rigid connects in above-mentioned two patent document Touching will affect blood fortune, under conditions of increase and shin bone faying face area.For this purpose, Chinese patent literature CN204971522U discloses a kind of anticorrosion bone plate, the densely covered blind hole in the surface of the anticorrosion bone plate, the filling of blind hole inside The various drugs and activity that can promote bone healing are higher than the metal or alloy of bone plate material.Although the anticorrosion bone plate It can reduce the damage to bone itself, but its body construction opposing straight, and the combination effect of bone by way of setting medicine It is bad.

Utility model content

The purpose of this utility model is to provide it is a kind of relatively good with shin bone binding ability and to this bulk damage of shin bone compared with Small magnesium alloy fracture of tibia bone plate.

According to the embodiments of the present invention, a kind of magnesium alloy fracture of tibia bone plate is provided, comprising:

Bone plate ontology, to adapt to shin bone body length direction and being provided with the batten of screw hole, and bone plate ontology exists Shin bone ontology is circumferentially the curved surface for being adapted to shin bone ontology physiological structure；

Flank, continued access have odd number in the both sides of bone plate ontology, and the two sides interplane in each pair of flank is about synthetism Section is arranged symmetrically during plate ontology is long；

Wherein, bone plate ontology and flank surfaces are formed with the coating for being loaded with antibacterials；

Flank is located in the middle in odd number flank to adapt at fracture.

Above-mentioned magnesium alloy fracture of tibia bone plate, optionally, flank is cambered plate.

Optionally, the radius of each flank is identical, wherein the central angle for being located in the middle a pair of of flank is greater than remaining flank Central angle.

Optionally, the central angle for being located in the middle a pair of of flank is 120 ° ~ 130 °, the central angle of remaining flank is 100 ° ~ 110°。

Optionally, it is provided with slot on flank, to reduce the contact surface area of flank and shin bone.

Optionally, the sum of unilateral flank chord length is not less than 0.8 times of bone plate body length.

Optionally, at least one side of the bone plate ontology in conjunction with shin bone has Surface Texture, Surface Texture construction are as follows:

The pit being evenly distributed on given face, pit depth are not more than 1/7th of bone plate body thickness, and not Less than 1/10th of bone plate body thickness.

Optionally, the back side of bone plate ontology is equipped with reinforcing rib；

Wherein, the back side is the surface opposite with front, and front is surface of the bone plate ontology in conjunction with shin bone.

Optionally, reinforcing rib constructs are as follows:

Circle body is formed by around the back side.

Optionally, circle body at least two sides are equipped with inwardly projecting flange；

Flange gradually becomes smaller among shin bone to both ends.

According to the embodiments of the present invention, the flank of odd number is increased on the both sides of bone plate ontology, flank is suitable Extend in bone plate ontology to both sides, increases bone plate ontology to the cornerite of shin bone, to improve crystallized ability and pressurization Ability.But flank is different from all standing of bone plate ontology, is similar to and increases fulcrum, to improve whole stability, to bone It is relatively small with the negative effect of peripheral organization.In addition, being loaded with by setting medicine layer in bone plate ontology and flank surfaces The coating of antibacterials reduces the side effect of systemic administration by the way of local application, and can also be loaded into and prevent for example Class drug is infected caused by bone plate.

In addition, the ontology of bone plate uses medical magnesium alloy material, magnesium alloy density and natural bone similar density, produced Raw stress shielding is more advantageous to knochenbruch healing.

Detailed description of the invention

Fig. 1 is integrated structure schematic diagram of the magnesium alloy fracture of tibia bone plate on shin bone in an embodiment.

Fig. 2 is magnesium alloy fracture of tibia bone plate schematic perspective view in an embodiment.

Fig. 3 is magnesium alloy fracture of tibia bone plate overlooking structure diagram in an embodiment.

Fig. 4 is the D-D cross-sectional view of Fig. 3.

Fig. 5 is the E-E cross-sectional view of Fig. 3.

Fig. 6 is the portion the I enlarged drawing of Fig. 4.

Fig. 7 is the portion the II enlarged drawing of Fig. 5.

Fig. 8 is magnesium alloy fracture of tibia bone plate present invention looks up structural representation in an embodiment.

In figure: A. magnesium alloy fracture of tibia bone plate, B1. distal tibial, B2. knochenbruch layer, B3. shin bone ontology, B4. shin bone Proximal end, C. screw.

1. flange, 2. bone plate ontologies, 3. flanks, 4. counterbores, 5. screw holes, 6. reinforcing ribs, 7. back side texture, 8. slots, 9. positive plane texture, 10. back coatings, 11. face-coatings.

Specific embodiment

It is understood that there is integrated both ends, shin bone ontology B3 as shown in Figure 1, shin bone in medical domain shin bone One end that distal end B1(is engaged with anklebone), one end that proximal tibia B4(is engaged with femur).In general, being used for shin bone ontology B3 The internal fixation apparatus of fracture, i.e. magnesium alloy fracture of tibia bone plate A also have integrated both ends, both ends i.e. the two of its length direction End, body i.e. its bone plate ontology 2.

Bone plate have must width, and need to be adapted to bone gabarit and in the direction of the width have curved surface knot Structure, structure as shown in Figure 5, structure bone plate has certain cornerite to shin bone accordingly, is conducive to relatively reliable fix.

In general, both ends in the longitudinal direction are denoted as end, corresponding contour edge is commonly referred to as in width direction Side.

And it is understood that be the structure constrained by edge, edge is reversed outer in being inwards.

Further, it is to be appreciated that the materials such as magnesium alloy have certain plasticity, can according to the Tibial shape of patient into Row moulding, to be adapted to the physiological structure of patient's shin bone, this is the common sense of this field, and details are not described herein.

Fig. 1 show the structural representation that magnesium alloy fracture of tibia bone plate A is fixed on shin bone ontology B3 by screw C Scheme, i.e., common shin bone ontology B3 Fracture internal fixaiion common structure, screw C there are six pieces in figure, in magnesium alloy fracture of tibia synthetism It is divided into two groups on the length direction of plate A, and lives apart in the two sides of knochenbruch layer B2.

Screw C uses sunk screw, is adapted to, and the screw hole 5 being opened on bone plate ontology 2 is with counterbore 4 Screw hole 5, to reduce the influence to perienchyma.

In general, the position knochenbruch layer B2 is the positive middle part of magnesium alloy fracture of tibia bone plate A, which is it The positive middle part of length direction, corresponding middle section are known as section in vertical, it is clear that section and length direction above-mentioned hang down during this is vertical Directly.

Correspondingly, the middle section vertical with vertical middle section is section in cross, is closed between two flanks 3 in a pair of of flank 3 Section is symmetrical in cross.

Referring to magnesium alloy fracture of tibia bone plate A shown in Figure of description 2, basic structure include a matrix and Its both sides continued access is to increase the flank 3 of bone plate cornerite, matrix therein, that is, bone plate shown in figure ontology 2.

For bone plate ontology 2, as previously described, because for shin bone ontology B3 fracture interior fixation, structure relative to The bone plate of distal tibial B1 fracture is simply more, is a batten shape on the whole, and the item of batten shape to growing in other words It is identical as the length direction of shin bone ontology B3 to spend direction.

In addition, bone plate ontology 2 can have homogeneous thickness, inner surface is positive in other words, i.e., connects with shin bone ontology B3 The surface of touching has the curvature of adaptation shin bone ontology B3, and forms curved surface, and bone plate also constitutes curved slab on the whole.

Since such bone plate ontology is magnesium alloy material, using its good plasticity, it can have initially before factory Curvature, be used for clinical treatment when carry out artificial moulding again, to be adapted with the shin bone physiological structure of patient.

General synthetism board width is in 14mm or so, and relatively small to the cornerite of shin bone, what shin bone can be equivalent is interpreted as column Body, the fixation of bone plate are equivalent to and carry out unilateral fixation to it, the reliability of interior fixation and its have to the cornerite of shin bone it is very big Relationship, however it should reduce the influence to periphery musculature, and have lesser width.

In the embodiments of the present invention, referring to Figure of description 2, it is equipped with flank 3 in bone plate ontology 2, in synthetism To the bone plate of width direction continued access in other words this ontology 2, flank 3 is different from simply widening bone plate sheet for the bending of plate ontology 2 Body 2, but it is equivalent widen, but relatively small to increased area, equivalent to increase multiple outer fulcrums, reinforcing on the whole is made With being significantly improved.

The pairing of flank 3 is arranged, symmetrical about section in cross between two flanks 3 in each pair of flank 3.

In Fig. 2, flank 3 shares 7 pairs, placed in the middle a pair of, and in addition the two sides of 6 pairs of sections in vertical respectively have 3 pairs, and about in vertical Section is symmetrical.

Wherein, bone plate ontology 2 and 3 surface of flank are formed with the coating for being loaded with antibacterials.About coating, it is preferred to use Cold spray technique forms coating, and cold spraying is smaller to placed drug influence, and will not generate decomposition or pharmacological property reduces.

The purpose that drug-carried coat is arranged is to be mainly used for antibacterial, and the drug of for example anti-rejection can also be added, and mitigation connects The rejection of bone plate merging.

Using cold spray technique in bone plate ontology 2 and the surface spray antimicrobial coating of flank 3, formed as shown in FIG. 6 Back coating 10 and face-coating shown in Fig. 7 11, antimicrobial coating can be povidone iodine or penicillin or Cephalosporins Deng have anti-infectious drug, and coating with a thickness of 300 ~ 600 μm.

As previously mentioned, the contact surface area of magnesium alloy fracture of tibia bone plate A and shin bone becomes larger after increasing flank 3, The negative effect of shin bone can be aggravated, mitigate this consequence by way of setting medicine.

In addition, bone plate ontology 2 and flank 3 use magnesium alloy, the preferably magnesium alloy marked as WE43 on the whole, have Good mechanical property, and it is very close with shin bone density, it is not easy to stress-shielding effect is generated, is being conducive to bone tissue just It is frequently grown.

For the magnesium alloy for example marked as WE43, itself has preferable corrosion resistance, can be to avoid degradation speed It is too fast, cause internal certain metal ions exceeded.

Magnesium elements are one of the essential trace elements of the human bodys, almost all metabolic processes and are also had in participant's body There is induction of bone growth.

Magnesium alloy compared to titanium alloy there is preferable degradation need not pass through secondary hand again although speed is slower Art is taken out.Correspondingly, screw C needs to make of degradation material, such as magnesium alloy screw.

Visible flank 3 is cambered plate in Fig. 3 and Fig. 8, under the conditions of entire area is lesser, has relative spread phase To biggish support.

Preferably, the radius of each flank 3 is identical, wherein the central angle for being located in the middle a pair of of flank 3 is greater than remaining flank 3 central angle can play better fixed function due to being located in the middle a pair of of flank 3 directly wrapping side knochenbruch layer B2.

Further, the central angle for being located in the middle a pair of of flank 3 is 120 ° ~ 130 °, and the central angle of remaining flank 3 is 100°~110°。

It is understood that having curved surface profile as stripe board is matching Tibial shape, arch is although in geometry In be planar graph, flank 3 also has curved surface profile in the transverse direction of bone plate in Fig. 2, but has no effect on those skilled in the art The understanding of member.In specific engineering practice, universal substantially similar mode characterizes dependency structure, such as hexagon-headed bolt, Its bolt head is substantially approximate hexagonal prism, and circle is cut at seamed edge both ends, not proper hexagonal prism.

In Fig. 4 and structure shown in Fig. 8, slot 8 is provided on flank 3, to reduce the contact surface area of flank 3 Yu shin bone, Reduce the influence transported to shin bone blood.

In some embodiments, 8 structural texture of slot is specifically found in Fig. 8, and slot 8 is located at the centre of flank 3, and centripetal side Small, centrifugation side is big, this kind of structure can effectively reduce flank 3 to shin under conditions of not changing 3 support distribution range of flank The influence of flesh and blood fortune.

In addition, in the embodiment shown in fig. 8, the construction of slot 8 is smaller to the intensity effect of flank 3, and in other words, this kind of slot Type in flank 3 fixing intensity slacken it is relatively small.

As it can be seen that there are gaps between flank 3 in Fig. 8, and the gap is smaller closer to centre, and inventor thinks 3 face of flank Product is smaller, and to the negative effect of shin bone with regard to smaller, but enabling capabilities can also decline.In structure shown in Fig. 8, using reasonable point Cloth is conducive under conditions of all 3 gross areas of flank are relatively small, and there is no decline significantly for reinforcement ability.

And passes through loading analysis, by shearing force maximum among bone plate ontology 2, have more by distribution shown in Fig. 8 Good load is distributed matching.

In Fig. 8, in addition to intermediate flank 3, remaining flank 3 is roughly the same, in some embodiments, flank 3 with its position The distribution relation set is as follows, bigger closer to centre, otherwise smaller.

In some embodiments, the sum of unilateral 3 chord length of flank is not less than 0.8 times of 2 length of bone plate ontology, i.e. flank 3 Distribution should not be excessively sparse, and otherwise its effect cannot be brought into play well.

In addition, central angle above-mentioned has defined its development length about the length that flank 3 extends to corresponding side, Details are not described herein.

It points out to set the negative effect that medicine and bone plate ontology 2 restore shin bone in content above-mentioned, coating is by its technique Limitation, thickness is not too large, and strength of coating can not be matched with the bone plate ontology 2 of magnesium alloy material, i.e., can cover and connect The attribute of bone plate ontology 2 is expressed, and therefore, coating is unsuitable blocked up.In Fig. 1 ~ 5 and structure shown in Fig. 8, in bone plate ontology 2 Front and back sides have Surface Texture, Surface Texture can increase the accommodating amount of drug, and be conducive to the sustained release of drug.

In addition, Surface Texture can reduce the contact surface area of bone plate ontology 2 Yu shin bone, mitigate the shadow transported to shin bone blood It rings.

In a preferred embodiment, Surface Texture constructs are as follows:

The pit being evenly distributed on given face, pit depth are not more than 1/7th of bone plate body thickness, and not Less than 1/10th of bone plate body thickness, to reduce the coverage to 2 attribute of bone plate ontology, and has and suitably set medicine Amount.

The given face, i.e., the selected surface for needing to mold Surface Texture, such as the front or anti-of bone plate ontology 2 Face.

Surface Texture is processed using laser femtosecond processing technology, and pore-forming (pit) aperture is easily controllable, and distribution mode is also easy In control.

Referring to shown in Figure of description 1, maximum stress suffered by the back side of magnesium alloy fracture of tibia bone plate A is greater than front Maximum stress suffered by side, when turning down to face side, shin bone can produce the moment of resistance self, and rearwardly not turn on one's side when rolling over shin bone self not The moment of resistance can be generated.In view of this, reinforcing rib 6 is equipped at the back side of bone plate ontology 2, in the structure shown in Fig. 1 ~ 3 to mention The shear resistance of high magnesium alloy fracture of tibia bone plate A back side.

In the structure shown in Fig. 2 and 3, the structure of reinforcing rib 6 is relatively easy, directly overleaf molds a circle, substantially In the turnup structure for folding of rearwardly turning on one's side, this kind of structure is easy to process.

In some embodiments, there can be multi-turn, but many coil structures should not form.

Further, circle body at least two sides are equipped with inwardly projecting flange 1, further increase magnesium alloy fracture of tibia synthetism The back side shear resistance of plate A.

In preferred structure, flange 1 is gradually become smaller among shin bone to both ends, and intermediate shear resistance needs stronger.This Outside, the recovery that the presence of flange 1 has conducive to surrounding tissue can generate "blind"effect, conducive to the growth of surrounding tissue cells.

In addition, the preferred 3.8mm of thickness of the bone plate ontology 2 of magnesium alloy fracture of tibia bone plate A, the aperture of screw hole 5 It is preferred that 4.5mm.

Claims (10)

1. a kind of magnesium alloy fracture of tibia bone plate characterized by comprising

Bone plate ontology, to adapt to shin bone body length direction and being provided with the batten of screw hole, and bone plate ontology is in shin bone Ontology is circumferentially the curved surface for being adapted to shin bone ontology physiological structure；

Flank, continued access have odd number in the both sides of bone plate ontology, and the two sides interplane in each pair of flank is about bone plate sheet Section is arranged symmetrically during body is long；

Wherein, bone plate ontology and flank surfaces are formed with the coating for being loaded with antibacterials；

Flank is located in the middle in odd number flank to adapt at fracture.

2. magnesium alloy fracture of tibia bone plate according to claim 1, which is characterized in that flank is cambered plate.

3. magnesium alloy fracture of tibia bone plate according to claim 2, which is characterized in that the radius of each flank is identical, In, the central angle for being located in the middle a pair of of flank is greater than the central angle of remaining flank.

4. magnesium alloy fracture of tibia bone plate according to claim 3, which is characterized in that be located in the middle a pair of of flank Central angle is 120 ° ~ 130 °, and the central angle of remaining flank is 100 ° ~ 110 °.

5. any magnesium alloy fracture of tibia bone plate according to claim 1 ~ 4, which is characterized in that slot is provided on flank, To reduce the contact surface area of flank and shin bone.

6. according to any magnesium alloy fracture of tibia bone plate of claim 2 ~ 4, which is characterized in that unilateral flank chord length it With 0.8 times not less than bone plate body length.

7. magnesium alloy fracture of tibia bone plate according to claim 1, which is characterized in that at least bone plate ontology and shin bone In conjunction with one side have Surface Texture, the Surface Texture construction are as follows:

The pit being evenly distributed on given face, pit depth is not more than 1/7th of bone plate body thickness, and is not less than / 10th of bone plate body thickness.

8. magnesium alloy fracture of tibia bone plate according to claim 1, which is characterized in that the back side of bone plate ontology is equipped with Reinforcing rib；

Wherein, the back side is the surface opposite with front, and front is surface of the bone plate ontology in conjunction with shin bone.

9. magnesium alloy fracture of tibia bone plate according to claim 8, which is characterized in that reinforcing rib construction are as follows:

Circle body is formed by around the back side.

10. magnesium alloy fracture of tibia bone plate according to claim 9, which is characterized in that circle body at least two sides be equipped with to Interior flange outstanding；

Flange gradually becomes smaller among shin bone to both ends.