CN201414855Y - Artificial knee-joint bone fusion prosthesis - Google Patents

Abstract

The utility model relates to artificial knee-joint bone fusion prosthesis, which comprises femoral condyle prosthesis, tibial plateau prosthesis and joint liners. The femoral condyle prosthesis is formed by a joint surface, a condylar combined surface, an intercondylar combined surface, a positioning body, a femoral intramedullary stem and a femoral intramedullary extended stem. The tibial plateauprosthesis is formed by a plateau body, a tibial combined surface, a wing plate or a positioning plate, a tibial intramedullary stem and a tibial intramedullary extended stem. The femoral intramedullary stem, the femoral intramedullary extended stem, the tibial intramedullary stem and the tibial intramedullary extended stem are hollow structures, and surfaces of the intramedullary stems and the intramedullary extended stems are porous structures or mesh structures for keeping hollow portions inside stem bodies communicated with the outside. When used, hollow portions of the intramedullary stems and the intramedullary extended stems are filled with autologous or heterologous crushed bone granules, total elastic modulus of external bone tissues and the crushed bone granules can be very close to that of human bones after the external bone tissues and the crushed bone granules filled in the intramedullary stems fuse and grow to a whole, thereby realizing long-time and effective preventionof looseness between the artificial knee-bone fusion prosthesis and bone substance.

Description

Artificial knee joint bone fusion prosthesis

Technical field

This utility model relates to artificial knee joint bone fusion prosthesis.

Background technology

The artificial knee replacement surgery has become a kind of common relatively surgical operation in medical circle at present, the implant of artificial knee joint is formed by condyle of femur prosthese and tibial plateau prosthese and with joint spacer and patella prosthese that ultra high molecular polyethylene is manufactured usually, Tong Hang way was that condyle of femur prosthese and tibial plateau prosthese are bonded in femur end and tibia end respectively with bone cement in the past, the rubbing surface of articular prosthesis can produce small chip gradually after surgery, the molten ossein that these microgranules are produced after by macrophage phagocytic impels the dissolving of Periprosthetic bone with passing in time, finally can cause the loosening of prosthese.Methods such as the biotype prosthese employing micropore that produces in recent years, bio-ceramic coating make prosthese and sclerotin contact surface can form growing into property and combine, in the hope of obtaining more permanent stablizing, but since the material that condyle of femur prosthese and tibial plateau prosthese are adopted mostly be rustless steel, titanium alloy, cobalt alloy and biology pottery, their common defectives are that elastic modelling quantity is too high, as titanium alloy is 110～120GPa, and rustless steel and cobalt alloy are then up to more than the 200GPa; And the elastic modelling quantity of cortical bone and spongy bone has only respectively about 15GPa and 1.5GPa, the elastic modelling quantity of metal material or ceramic material is tens times even tens times of osseous tissue, implant prosthese mechanical property and osseous tissue with above-mentioned material can't mate mutually, the load that high elastic modulus can make implant Periprosthetic osseous tissue bear is too small and then cause and bone resorption, osteanabrosis and disuse osteoporosis finally still can cause prosthetic loosening.

The utility model content

The purpose of this utility model provides a kind of artificial knee joint prosthesis that can merge with osseous tissue of low elastic modulus.

For achieving the above object, this utility model is taked following design:

A kind of artificial knee joint bone fusion prosthesis, comprise the condyle of femur prosthese, the tibial plateau prosthese, articular surface liner three parts, it is characterized in that, the condyle of femur prosthese is by articular surface, the condyle faying face, faying face between condyle, positioning body, handle in the femur marrow, prolonging handle in the femur marrow constitutes, prolonging handle in handle and the femur marrow in the described femur marrow is hollow structure, handle is porous or mesh-structured to guarantee that handle body inner hollow partly keeps being communicated with the outside with the interior handle surface that prolongs of femur marrow in the femur marrow, the tibial plateau prosthese is by the platform body, the tibia faying face, wing plate or positioning body, handle in the tibia marrow, prolonging handle in the tibia marrow constitutes, prolonging handle in handle and the tibia marrow in the described tibia marrow is hollow structure, handle is porous or mesh-structured to guarantee that handle body inner hollow partly keeps being communicated with the outside with the interior handle surface that prolongs of tibia marrow in the tibia marrow, and joint spacer is between condyle of femur prosthese and the tibial plateau prosthese so that form articular surface with condyle of femur prosthese and tibial plateau in addition.

The utility model has the advantages that:

1, this utility model artificial knee joint bone fusion prosthesis, it comprises the condyle of femur prosthese, the tibial plateau prosthese, articular surface liner three parts, the condyle of femur prosthese is by articular surface, the condyle faying face, faying face between condyle, positioning body, handle in the femur marrow, prolonging handle in the femur marrow constitutes, prolonging handle in handle and the femur marrow in the described femur marrow is hollow structure, handle is porous or mesh-structured to guarantee that handle body inner hollow partly keeps being communicated with the outside with the interior handle surface that prolongs of femur marrow in the femur marrow, the tibial plateau prosthese is by the platform body, the tibia faying face, wing plate or positioning body, handle in the tibia marrow, prolonging handle in the tibia marrow constitutes, prolonging handle in handle and the tibia marrow in the described tibia marrow is hollow structure, handle is porous or mesh-structured to guarantee that handle body inner hollow partly keeps being communicated with the outside with the interior handle surface that prolongs of tibia marrow in the tibia marrow, during use in femur marrow handle, prolong handle in handle and the tibia marrow in the femur marrow, the hollow bulb that prolongs handle in the tibia marrow is filled the broken osseous granules from body or allosome, by the time the broken osseous granules fusion growth of filling in the handle in outside osseous tissue and the marrow be integral its overall elastic modelling quantity of back can and people's bone is very approaching prevents to take place between artificial knee joint bone fusion prosthesis and sclerotin the effect of becoming flexible long-term effectively to reach.

2, this utility model artificial knee joint bone fusion prosthesis, prolong surface, handle handle inside and outside in handle, the tibia marrow in prolongation handle, tibial plateau prosthese and platform body, tibia faying face, wing plate or positioning body, the tibia marrow in handle, the femur marrow in faying face, positioning body, the femur marrow between its condyle faying face, condyle and have hydroxyapatite coating layer, have the function of inducing the osteocyte growth.

3, this utility model artificial knee joint bone fusion prosthesis, its mesh are single layer structure, if combine more firmly for the ease of sclerotin with the handle body then can adopt bilayer or the multilamellar mesh.

4, this utility model artificial knee joint bone fusion prosthesis, it uses medical metal or bioceramic to make, so it has good biocompatibility.

Description of drawings

Fig. 1 is this utility model decomposition texture sketch map

Fig. 2 is this utility model embodiment one structural representation

Fig. 3 is this utility model embodiment two structural representations

Fig. 4 is a handle structure sketch map in this utility model tibial plateau prosthese embodiment porous tibia marrow

Fig. 5 is a handle structure sketch map in this utility model tibial plateau prosthese embodiment mesh tibia marrow

Fig. 6 is this utility model condyle of femur prosthese embodiment three sketch maps

Fig. 7 is this utility model tibial plateau prosthese embodiment four sketch maps

Fig. 8 fills broken osseous granules sketch map in the handle body in this utility model marrow

Fig. 9 is handle and interior handle, the interior handle of tibia marrow and the interior handle structure sketch map that prolongs of tibia marrow of prolonging of femur marrow in this utility model femur marrow

Figure 10 is a monolayer mesh sketch map

Figure 11 is double-deck mesh sketch map

Figure 12 is a multilamellar mesh sketch map

The specific embodiment

As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, shown in Figure 12, a kind of artificial knee joint bone fusion prosthesis of this utility model, it comprises: condyle of femur prosthese 1, tibial plateau prosthese 2 and joint spacer 3, it is characterized in that condyle of femur prosthese 1 has handle 8 and the interior handle 9 that prolongs of femur marrow in faying face 6 between articular surface 4, condyle faying face 5, condyle, positioning body 7, the femur marrow; Tibial plateau prosthese 2 has handle 12 in platform body 10, tibia faying face 11, the tibia marrow, interior handle 13, wing plate 14 or the positioning body 7 of prolonging of tibia marrow; Handle 8 in the femur marrow, prolong handle 9 in the femur marrow, the inside that prolongs handle 13 in the tibia marrow in handle 12 and the tibia marrow is hollow structure, form by a plurality of holes 15 on the outer wall or form the sclerotin faying face by mesh 16, hole 15 or mesh 16 make interior handle of marrow or the interior handle inner hollow part that prolongs of marrow keep being communicated with the outside, the quantity in hole 15 and shape can design according to the dimensions and the stressing conditions that prolong the handle body in handle body and the marrow in the marrow, the quantity of mesh 16 and shape can design according to the dimensions and the stressing conditions that prolong the handle body in handle body and the marrow in the marrow, the multi-form combination that can design pore-forming 15 and mesh 16 in same marrow on the handle as required is (as Fig. 6, Fig. 7), mesh 16 can be designed to monolayer (as Figure 10), also can be designed to multilamellar more than two layers (as Figure 11, Figure 12), as required that the hollow part that broken osseous granules 17 is packed into handle body in the marrow is standby before the operation by the doctor, the cross sectional shape of positioning body 7 can be circular, polygon, star or the like, also can be tabular, positioning body 7 is by hole and mesh-structured the composition, can be designed to hollow in case of necessity, wing plate 11 is by hole and mesh-structured the composition; Wing plate 11 and positioning body 7 can use separately also and can be used in combination.

The processing method that condyle of femur prosthese 1 and tibial plateau prosthese 2 adopt in this utility model artificial knee joint bone fusion prosthesis is: set up the artificial knee joint bone fusion prosthesis three-dimensional entity model in electronic computer, then according to the data of three-dimensional entity model with laser or high-power electron beam processing method melt molding blank, perhaps use die casting, the investment casting method molded blank, can also use spark machined, chemical attack, methods such as machine drilling cutting are being cast or the artificial knee joint bone fusion prosthesis blank surface etch of forging molding, corrosion, brill mills out needed hole and mesh, also can obtain required structure in addition, at last with conventional cutting and finishing method processing articular surface and assembly structure with powder sintering method.

At first kneed femur end of patient and tibia end are cleared up plastotype operation Shi doctor with specific purpose tool, then with handle 8 in the femur marrow of this utility model artificial knee joint bone fusion prosthesis, it is an amount of from body or the broken osseous granules 17 of allosome to pack in the handle 12 in the tibia marrow, the reuse specific purpose tool is mounted on femur end and tibia end precalculated position respectively with condyle of femur prosthese 1 and tibial plateau prosthese 2, handle handle body in the marrow of artificial knee joint bone fusion prosthesis and sclerotin in femur and the tibia pulp cavity are tightly pushed, postoperative treat sclerotin pass broken osseous granules 17 that hole 15 and mesh 16 and handle body be implanted into gradually fusion growth be integral the back artificial knee joint bone fusion prosthesis and will obtain to stablize good long term preventing and become flexible.

This utility model artificial knee joint bone fusion prosthesis uses has the material manufacture of good biocompatibility, adopts medical metal or bioceramic etc. to make as it.

Each surface that contacts with sclerotin has hydroxyapatite coating layer, and this hydroxyapatite coating layer can adopt conventional plasma spraying method or the heavy collection method of electrochemistry and sintering process to form.

Claims (7)

1, a kind of artificial knee joint bone fusion prosthesis, it is characterized in that, it comprises condyle of femur prosthese (1), tibial plateau prosthese (2) and joint spacer (3), condyle of femur prosthese (1) has articular surface (4), condyle faying face (5), faying face between condyle (6), handle (8) in positioning body (7) and the femur marrow, prolong handle (9) in the femur marrow, tibial plateau prosthese (2) has platform body (10), tibia faying face (11), handle (12) in the tibia marrow, prolong handle (13) in the tibia marrow, wing plate (14) or positioning body (7), handle (8) in the femur marrow, prolong handle (9) in the femur marrow, handle (12) in the tibia marrow, prolong the distribution of handle (13) handle body porose (15) or mesh (16) structure in the tibia marrow, be interconnected between hole (15) or between the mesh (16).

2, artificial knee joint bone fusion prosthesis according to claim 1, it is characterized in that, prolonging the inside that prolongs handle (13) handle body in handle (9), the tibia marrow in handle (12), the tibia marrow in handle (8), the femur marrow in the femur marrow is hollow structure, a plurality of holes (15) or mesh (16) are arranged on the handle wall, and hole (15) or mesh (16) make the interior handle inner hollow part that prolongs of interior handle of marrow and marrow keep being communicated with the outside.

3, artificial knee joint bone fusion prosthesis according to claim 1 is characterized in that, the quantity of hole (15) is one or more.

4, artificial knee joint bone fusion prosthesis according to claim 1 is characterized in that, the number of plies of mesh (16) is a single or multiple lift.

5, artificial knee joint bone fusion prosthesis according to claim 1, it is characterized in that hole (15), mesh (16) are arranged in simultaneously and prolong the handle body that prolongs handle (13) in handle (9), the tibia marrow in handle (12), the tibia marrow in the femur marrow in handle (8), the femur marrow.

6, artificial knee joint bone fusion prosthesis according to claim 1 is characterized in that, it adopts medical metal, bioceramic manufacturing.

7, artificial knee joint bone fusion prosthesis according to claim 1 is characterized in that, each surface that prosthese contacts with sclerotin has hydroxyapatite coating layer.

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