A kind of artificial dog hip prosthesis of porous metalsTechnical field
The utility model relates to medical instruments fields, particularly relate to a kind of artificial dog hip prosthesis of porous metals.
Background technique
Currently, artificial hip joint replacing is performed the operation, it has also become medical field treatment hip joint disable that class disease generallys use oneThe effective method of kind, the fixed effect between the acetabular bone and femoral stem and natural bone of postoperative ankle implantation are to determine that joint prosthesis makesWith the key in service life.
There are two types of existing frequently-used fixing means, and one is the cement reaction technologies for being suitable for elderly patient, anotherIt is the biological fixation technology suitable for young patient.Wherein, the sides such as biological fixation technology is sintered by pellet or titanium silk weavesMethod forms micropore surface layer on acetabular bone and femoral stem, creates conditions for growing into for osteocyte.The porosity of this microporous layersLow, only 10-20%, the osteocyte amount of growing into is few and subtle.It is also a large amount of in recent years to spray titanium using in acetabular bone and femoral stem surfaceThe mode of powder or spraying hydroxyapatite induces osteocyte to grow into, is attached to the coarse of prosthese by titanium valve or hydroxyapatiteIt realizes and fixes on surface.Above-mentioned various biological fixation methods confirm often occur because of advanced stage acetabular bone or femoral stem through clinical for many yearsLoosening, sink and cause second operation to be overhauled, make troubles to patient and pain.
Utility model content
The purpose of this utility model is to provide a kind of artificial dog hip prosthesis of porous metals, for solving the prior artThe problems such as middle osteocyte amount of growing into is few, acetabular bone or femoral stem loosen and sink.
To achieve the above object, the utility model the following technical schemes are provided:
A kind of artificial dog hip prosthesis of porous metals, including acetabular cup, acetabular bone liner, femur bulb and femoral stem, instituteStating femoral stem includes handle neck and shank body, and one end of the handle neck connects the shank body, is cased on the other end of the handle neck describedFemur bulb is cased with the acetabular bone liner on the femur bulb, and lining is cased with acetabular cup in the acetabular bone；Outside the acetabular cupSurface has the first porous metallic layers, and the femoral stem outer surface has the second porous metallic layers.
First porous metallic layers and second porous metallic layers are irregular space network.
The acetabular cup is made of the first porous metal cup and the second porous metal cup, multiple first porous metal cupsInterconnection is formed by outer surface with meshed grooves, and multiple second porous metal cups are arranged in the meshed groovesInterior, the thickness of first porous metal cup and second porous metal cup is 0.5-3.0mm.
The acetabular cup by multiple third porous metal cups interconnection constitute, the third porous metal cup with a thickness of2.5-5.0mm。
The porosity of first porous metallic layers and second porous metallic layers is 50%-80%.
The aperture of first porous metallic layers and second porous metallic layers is 400-800 μm.
Second porous metallic layers with a thickness of 1.5-3mm.
The material of first porous metallic layers and second porous metallic layers is medical titanium alloy, the conjunction of medical cobalt-basedGold, Medical tantalum and alloy or medical niobium and alloy.
The above-mentioned technical proposal of the utility model has the beneficial effect that:
In above scheme, first porous metallic layers and the second porous metallic layers of the utility model all have good biologyCompatibility, aperture, porosity, elasticity modulus are similar to host bone tissue；First porous metallic layers and the second porous metallic layersSurface layer structure all has infiltration response, be conducive to ingredient in blood carry out the functional compound of bone-imitation tissue at；First porous goldThe metal layer for belonging to layer and the second porous metallic layers is in luffa shape, forms the structure feature for being similar to bone trabecula, porosity reaches50-80%, intensity are between cortex bone and cancellous bone, and all ducts can guarantee interconnected, inducible bone tissue early stageIt is formed, improves early stage load capacity after Using prosthesis.After dog body bone tissue is fully grown into, the porous metals knot of adequate thicknessStructure can guarantee prosthese and the enough bond strengths of host's bone interface, effectively increase artificial dog hip prosthesis in vivoLong-time stability make artificial dog hip prosthesis and host bone tissue realize depth integration, natural bone are made to grow together with prosthese,To realize that prosthese is integrated with natural bone fixed, effectively enhances fixed effect, the pine of articular prosthesis can be prevented for a long timeDynamic and sinking, prolongs the service life.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the prosthese of the utility model；
Fig. 2 is the part schematic diagram of the prosthese of the utility model；
Fig. 3 is the structural schematic diagram of the acetabular cup of the utility model.
Appended drawing reference:
1, acetabular cup；
2, acetabular bone liner；
3, femur bulb；
4, femoral stem；
401, handle neck；
402, shank body.
Specific embodiment
In order to make the technical problems, technical solutions and advantages to be solved by the utility model clearer, below in conjunction with attached drawingAnd specific embodiment is described in detail.
The utility model aiming at the problem that loosening and sinking of few, acetabular bone or femoral stem, is mentioned the existing osteocyte amount of growing intoFor a kind of artificial dog hip prosthesis of porous metals.
As shown in Figure 1-3, a kind of artificial dog hip prosthesis of porous metals, including acetabular cup 1, acetabular bone liner 2, femoral ballFirst 3 and femoral stem 4, the femoral stem 4 includes handle neck 401 and shank body 403, and one end of the handle neck 401 connects the shank body403, the femur bulb 3 is cased on the other end of the handle neck 401, and the acetabular bone liner 2 is cased on the femur bulb 3,Acetabular cup 1 is cased on the acetabular bone liner 2.1 outer surface of acetabular cup has the first porous metallic layers, outside the femoral stem 4Surface has the second porous metallic layers, and the outer diameter of the acetabular cup is 10-35mm, and preferably 18mm is able to satisfy different kind of dog, ageAnd all dogs of size.
As shown in Fig. 2, second porous metallic layers with a thickness of 1.5-3mm, using 1.5mm as optimal value.Described secondPorous metallic layers are connect with 403 laser welding of shank body, and the second metal layer is located at the shank body 403 close to the bright neck401 one end or the second metal layer cover the entire shank body 403.The cross section of the shank body 403 is rectangle, energyIt allows effective anti-rotation after Using prosthesis, keeps the stability of prosthese.
As shown in Figs. 1-2, first porous metallic layers and second porous metallic layers are 0.1-3mm's by diameterMedical titanium alloy, Medical Cobalt-Based Alloys, Medical tantalum and alloy, medical niobium and alloy bar are regularly or irregularly interweaved connectionIt constitutes, wherein the diameter optimum value of alloy bar is 0.3mm, forms the structure feature of similar bone trabecula, first porous metalsLayer and the porositys of second porous metallic layers are 50%-80%, first porous metallic layers and described second porousThe aperture of metal layer is 400-800 μm, and first porous metallic layers and second porous metallic layers are irregular solidReticular structure plays the role of bone trabecula, it is ensured that dog body bone tissue is fully grown into such as luffa sample or spongy.
As shown in figure 3, there are two types of the structures of the acetabular cup 1, the first, the acetabular cup 1 is by the first porous metal cupIt is constituted with the second porous metal cup, multiple first porous metal cup interconnections are formed by outer surface with netted recessedSlot, multiple second porous metal cups are arranged in the meshed grooves, first porous metal cup and more than described secondMesoporous metal cup uses pulsed laser welding, and the thickness of first porous metal cup and second porous metal cup is 0.5-3.0mm.Second, the acetabular cup is made of the interconnection of multiple third porous metal cups, the third porous metal cupWith a thickness of 2.5-5.0mm.
The use process of the utility model: the lower end of the shank body 403 is inserted by Using prosthesis dog body hip regionIn dog body femoral bone cavitas medullaris, agree with until stating shank body 403 with the dog body femoral bone cavitas medullaris, the acetabular cup 1 is implanted into dog body acetabular boneIn nest.
After the metal porous dog artificial hip joint of the utility model is implanted into dog body, the osteocyte that dog body natural bone is born,The inner cavity that aperture layer is grown by the hole of first porous metallic layers and second porous metallic layers, is mutually handed in aperture layerIt knits, forms new bone trabecula around locking, and with the blood supply that grows into of fine vascular, tissue is grown into, soft tissue adsorbs and blood vesselChange and occur, natural bone is made to grow together with prosthese, to realize that prosthese is integrated with natural bone fixed, effectively enhancing is fixedEffect can prevent the loosening and sinking of articular prosthesis for a long time, prolong the service life.
In above scheme, first porous metallic layers and the second porous metallic layers of the utility model all have good biologyCompatibility, aperture, porosity, elasticity modulus are similar to host bone tissue；First porous metallic layers and the second porous metallic layersSurface layer structure all has infiltration response, be conducive to ingredient in blood carry out the functional compound of bone-imitation tissue at；First porous goldThe metal layer for belonging to layer and the second porous metallic layers is in luffa shape, forms the structure feature for being similar to bone trabecula, porosity reaches50-80%, intensity are between cortex bone and cancellous bone, and all ducts can guarantee interconnected, inducible bone tissue early stageIt is formed, improves early stage load capacity after Using prosthesis.After dog body bone tissue is fully grown into, the porous metals knot of adequate thicknessStructure can guarantee prosthese and the enough bond strengths of host's bone interface, effectively increase artificial dog hip prosthesis in vivoLong-time stability make artificial dog hip prosthesis and host bone tissue realize depth integration, natural bone are made to grow together with prosthese,To realize that prosthese is integrated with natural bone fixed, effectively enhances fixed effect, the pine of articular prosthesis can be prevented for a long timeDynamic and sinking, prolongs the service life.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the artFor personnel, under the premise of not departing from principle described in the utility model, several improvements and modifications can also be made, these improvementIt also should be regarded as the protection scope of the utility model with retouching.