CN204618488U - A kind of combination type full stress-strain macromolecular material artificial knee joint - Google Patents
A kind of combination type full stress-strain macromolecular material artificial knee joint Download PDFInfo
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Abstract
A kind of combination type full stress-strain macromolecular material artificial knee joint, comprise the condyle of femur of polyether-ether-ketone (PEEK) or derivatives thereof and the tibia liner of tibia support and ultra-high molecular weight polyethylene (UHMWPE), wherein tibia support comprises platform and perpendicular stabilizer location division; The top and bottom of tibia liner engage with condyle of femur and platform respectively; The sliding surface of condyle of femur to tibia liner has buffering; Tibia support can fine motion to the stationary plane of tibia liner, and to the sliding surface of tibia liner and tibia support, the fine motion to tibia liner matches condyle of femur.The major part of all implants parts of the present utility model is made up of macromolecular material, reduces allergy, toxicity problem that metal may cause with its corrosion; Elastic modelling quantity and the natural bone of PEEK match, and alleviate stress shielding problem; PEEK condyle of femur and tibia support combine the sliding surface of UHMWPE tibia liner and stationary plane fine motion, and significantly reduce wear problem, add enhancing and developing parts, practicality is further enhanced simultaneously.
Description
Technical field
This utility model relates to a kind of medical rehabilitation instrument, more specifically, relates to a kind of combination type full stress-strain macromolecular material artificial knee joint.
Background technology
Total knee arthroplasty from last century the seventies be applied to clinical since, the material of implants is made up of cobalt chrome molybdenum (CoCrMo) alloy and ultra-high molecular weight polyethylene (UHMWPE) substantially.The design of knee-joint prosthesis mainly comprises two interfaces, and one of them is immobile interface, is one of in addition the sliding surface of articular surface.Prosthese is generally by bone cement or Bone Ingrowth is direct and bone is fixed, and tibial component has been changed into the combination type (Modular) used at present by the polyethylene liner in 70-80 age in last century.Modern knee prosthesis requires that doctor can grasp the soft tissue balance of patient, and can adjust the thickness of tibia liner in operation process in time, therefore knockdown tibia support is widely used.CoCrMo Alloyapplication is in condyle of femur and tibia support, and ultra-high molecular weight polyethylene is applied to tibia liner and patella rubbing surface.Titanium alloy was once applied to condyle of femur and tibia support, but due to titanium alloy undesirable to ultra-high molecular weight polyethylene rubbing surface, even if after overlay coating process, its wear problem is not significantly improved, thus could not extensive use.In recent years, ceramic material is applied to condyle of femur to lower the wearing and tearing of ultra-high molecular weight polyethylene by instead CoCrMo alloy, but because its elastic modelling quantity or rigidity are too high, anti-impact force is more weak, be confined to application (Bader R among a small circle, Bergschmidt P, Fritsche A, Ansorge S, Thomas P, Mittelmeier W. (2008) Alternative materials and solutions in total knee arthroplasty for patients with metal allergy.Orthopade.2008Feb; 37 (2): 136-42).Since the beginning of this century, the zirconium-niobium alloy of surface ceramic deposition is applied to condyle of femur displacement, but because its surface rigidity is still too high, matrix is softer, wear problem does not solve (Essner A completely, Herrera L, Hughes P, Kester M. (2011) The influence of material and design on total knee replacement wear.J Knee Surg.2011Mar; 24 (1): 9-17), and expensive, be still confined to application among a small circle.Therefore, in the historical process of artificial knee joint replacement five more than ten years, CoCrMo alloy remains the most frequently used implants material to ultra-high molecular weight polyethylene.
Metal or ceramic material no matter are applied to condyle of femur or tibia support all exists the clinical problem of complying with one's wishes not to the utmost.First, wear problem (Kinney MC, Kamath AF. (2013) Osteolytic pseudotumor after cemented total knee arthroplasty.Am J Orthop (the Belle Mead NJ) .2013Nov of ultra-high molecular weight polyethylene sliding surface; 42 (11): 512-4), and the height being widely used in hip joint be cross-linked UHMWPE can't be widely used in knee joint (Hinarejos P,
i, Torres A, Prats E, Gil-G ó mez G, Puig-Verdie L. (2014) Highly crosslinked polyethylene does not reduce the wear in total knee arthroplasty:in vivo study of particles in synovial fluid.J Arthroplasty.2013Sep; 28 (8): 1333-7); Second, the fretting wear problem in UHMWPE on metal tibia support non-slip face, same problem also occurs in hip joint (Banerjee S, Cherian JJ, Bono JV, Kurtz SM, Geesink R, Meneghini RM, Delanois RE, Mont MA. (2014) Gross Trunnion Failure After Primary Total Hip Arthroplasty.J Arthroplasty.2014Nov 26.pii:S0883-5403 (14) 00899-7); 3rd, metal or ceramic condyle of femur are to stress shielding problem (the Panegrossi G of natural bone, Ceretti M, Papalia M, Casella F, Favetti F, Falez F. (2014) Bone loss management in total knee revision surgery.Int Orthop.2014Feb; 38 (2): 419-27); 4th: metal tibial holder is to stress shielding problem (the Panegrossi G of natural bone, Ceretti M, Papalia M, Casella F, Favetti F, Falez F. (2014) Bone loss management in total knee revision surgery.Int Orthop.2014Feb; 38 (2): 419-27); 5th, CoCrMo alloy contains a small amount of nickel element, cause anaphylaxis (the Innocenti M of some patients, Carulli C, Matassi F, Carossino AM, Brandi ML, Civinini R. (2014) Total knee arthroplasty in patients with hypersensitivity to metals.Int Orthop.2014Feb; 38 (2): 329-33); 6th, metal material inevitably produces corrosion in human body, discharge Co, Cr, Mo, Ni plasma, excessive Metal ion release can produce toxicity (Kretzer JP, Reinders J, Sonntag R, Hagmann S, Streit M, Jeager S, Moradi B. (2014) Wear in total knee arthroplasty--just a question of polyethylene?: Metal ion release in total knee arthroplasty.Int Orthop.2014Feb; 38 (2): 335-40); 7th, metal material particularly CoCrMo has a strong impact on nuclear magnetic resonance, NMR (MRI) imaging (Bachschmidt TJ, Sutter R, Jakob PM, Pfirrmann CW, Nittka M. (2014) Knee implant imaging at 3Tesla using high-bandwidth radiofrequency pulses.J Magn Reson Imaging.2014Aug 23.doi:10.1002/jmri.24729. [Epub ahead of print]).
For the design of sliding surface, as far back as the nineties in last century, British physician and scientist once attempted total knee replacement application clinically (Plante-Bordeneuve P, Freeman MA. (1993) the Tibial high-density polyethylene wear in conforming tibiofemoral prostheses.J Bone Joint Surg Br.1993Jul be all made up of high-molecular organic material; 75 (4): 630-6).Condyle of femur is made up of Polyacetal (Delrin) macromolecular material, tibia rubbing surface is made up of ultra-high molecular weight polyethylene (UHMWPE), fixing employing bone cement between Polyacetal condyle of femur and natural bone or do not have the squash type of bone cement to fix, adopts cement reaction between tibia polyethylene friction means and natural bone.The clinical trail of 10 years finds, Polyacetal does not occur abnormal wear problem to UHMWPE rubbing surface, and Polyacetal condyle of femur does not have mechanical damage problem yet.And cause the problem of overhauling mainly to loosen and early infection (Bradley GW, Freeman MA, Tuke MA, McKellop HA. (1993) Evaluation of wear in an all-polymer total knee replacement.Part 2:clinical evaluation of wear in a polyethylene on polyacetal total knee.Clin Mater.1993; 14 (2): 127-32; McKellop HA,
t, Bradley G. (1993) Evaluation of wear in an all-polymer total knee replacement.Part 1:laboratory testing of polyethylene on polyacetal bearing surfaces.Clin Mater.14 (2): 117-26; Moore DJ, Freeman MA, Revell PA, Bradley GW, Tuke M. (1998) Can a total knee replacement prosthesis be made entirely of polymers? J Arthroplasty.13 (4): 388-95).Due to the poor chemical stability of Polyacetal after gamma ray sterilizing, Polyacetal is stopped as the clinical practice of condyle of femur.
Therefore, up to the present, the knee-joint prosthesis applied clinically is all metal material particularly CoCrMo alloy, and above-mentioned macromolecular material can not get practical application owing to there being a series of shortcoming always.
In recent years, American scientist and research worker find, the extraordinary polyether-ether-ketone of biocompatibility (PEEK) macromolecular material of high strength and high stability has better wearability (Wang AG than CoCrMo alloy to UHMWPE rubbing surface to the rubbing surface of UHMWPE acetabular cup liner as femoral hip prosthesis head, Zhang ZT, Lawrynowicz DE and Yau SS (2010) Orthopedic PAEK-on-polymer bearings, HOWMEDICA OSTEONICS CORP, IPC8Class:AA61F230FI, USPC Class:623-1811, Patent application number:20100312348, 2010-12-09, Singh, V, Ogden, C, Sitton, K and Sitton, K (2012) Wear evaluation of different polymeric materials for total disc replacement (TDR), Proceedings of the ASME/STLE International Joint Tribology Conference, Los Angeles, CA, 2011,35-37,2012).
The concept of PEEK to polyethylene slip surface has been researched and proposed although above-mentioned, but PEEK is to the friction on polyethylene slip surface, its be only suitable for having matched well degree, the articular surface of low surface contact stress, the hip joint (wear extent: 16.5 ± 1.8mm of such as socket arrangement
3/ million, Wang AG, Zhang ZT, Lawrynowicz DE and Yau SS (2010) Orthopedic PAEK-on-polymer bearings, HOWMEDICA OSTEONICS CORP, IPC8Class:AA61F230FI, USPC Class:623-1811, Patent application number:20100312348,2010-12-09).And, PEEK can not directly embody the low wearing and tearing of High molecular weight polyethylene on hip joint in knee joint, knee joint is due to the requirement of different motion, add the impulsive force being far longer than hip joint, surface configuration is very complicated, matching degree is relatively poor, and this can cause knee joint surface pressure (10 ~ 20MPa) far away higher than hip joint (2 ~ 5MPa).These more severe mechanical environments and the coupling of the metal tibial holder with high stiffness cause wearing and tearing significantly to increase.According to ISO14243 standard testing, PEEK condyle of femur can reach 18.0 ± 3.0mm to the wearing and tearing of High molecular weight polyethylene liner
3/ million, higher than the CoCrMo used at present to poly wear extent (9.0 ± 4.0mm
3/ million, Fisher J, Jennings LM, Galvin AL, Jin ZM, Stone MH, Ingham E. (2010) Knee Society Presidential Guest Lecture:Polyethylene wear in total knees.Clin Orthop Relat Res.2010Jan; 468 (1): 12-8.doi:10.1007/s1 1999-009-1033-1.Epub 2009Aug 11), up to the present this also confirm further, and the knee-joint prosthesis why applied clinically is all metal material particularly CoCrMo alloy.
For the problems referred to above, we have done lot of experiments, and by processing further the friction surface of PEEK condyle of femur to High molecular weight polyethylene liner, andfrictional conditions has had certain improvement, but does not do the trick.No matter more than test is directly be fixed on tibia as liner bone cement in metal tibial holder or using High molecular weight polyethylene, and result is all very nearly the same.
Further, we study discovery, according to tribology principle, under high-intensity exercise load, joint wear has certain conduction transferance, should do to optimize further to reduce this impact load to tibia support, indirectly reach and reduce PEEK condyle of femur to the wear extent of High molecular weight polyethylene liner.But due to knee joint structure feature, tibia support assume responsibility for maximum load, no matter be clinical practice, or document never adopt or mentioned tibia support and can adopt other materials.Therefore, this utility model key is whether can find out this substitution material, meet intensity simultaneously, slow down the instructions for use that impact load reduces wearing and tearing, make whole artificial knee joint entire system is better than the artificial knee joint of current all-metal material particularly CoCrMo alloy.
Utility model content
This utility model proposes the artificial knee joint system be made up of high molecular polymer first, it comprises condyle of femur, tibia liner and tibia support, wherein condyle of femur and tibia support are made up of PEEK or derivatives thereof material, and tibia liner is made up of High molecular weight polyethylene material.Knee joint structure of the present utility model is owing to creatively have employed the tibia support of PEEK or derivatives thereof material, and PEEK condyle of femur is applied in knee joint system High molecular weight polyethylene tibia liner possibility.In this utility model, by the coupling of material properties between polyethylene tibia liner and PEEK tibia support, increase PEEK condyle of femur to the buffering of the sliding surface of polyethylene tibia liner, control micrometric displacement between the two, have impact on the abrasion mechanism of PEEK condyle of femur to High molecular weight polyethylene tibia liner, add that sports load can effectively conduct down by PEEK tibia support, slidingsurface between PEEK condyle of femur and polyethylene tibia liner and the jogging motion between polyethylene liner and PEEK tibia support are matched, reduce the alternating shear because Multidirectional motion causes, thus greatly can lower the surperficial overall wear of polyethylene liner two.According to ISO14243 standard testing, wear extent is reduced to 5.0 ± 1.2mm
3/ million, the CoCrMo being significantly better than using at present is to poly wear extent (9.0 ± 4.0mm
3/ million), therefore can predict, the knee joint life-span based on wearing and tearing can reach 40 years from current 20 years.This provide enough the probability of the complete knee joint system Clinical practice based on PEEK material.
In addition, this utility model uses owing to decreasing metal material the clinical problem caused, such as, the sensitivity of metal ion, toxicity, problems such as pseudotumor and because the elastic modelling quantity (3GPa) of PEEK material is well below metal (200GPa) with the elastic modelling quantity of bone similar (0.8 ~ 17GPa), so adopt the tibia support of PEEK can reduce the stress shielding of tibia, avoid bone resorption, thus reach more than the fixed effect good for a long time of 30 years; The knee joint system that overall height Molecularly Imprinted Polymer is formed can be widely used in different patient by these advantages, especially young patient, and does not need clinical overhauling; This not only can reduce the misery of patient, can also greatly reduce medical treatment cost.In addition, this utility model also solves the clamping problem in polymer operation process further, not damage polymer prosthesis, solve clinical actual use problem, this utility model also solves the postoperative visualization problems of polymer prosthesis, to observe surgical effect and the long service of prosthese in human body simultaneously.
In order to realize above-mentioned utility model, this utility model adopts following technical scheme:
A kind of combination type full stress-strain macromolecular material artificial knee joint, comprises condyle of femur, tibia liner and tibia support, wherein:
Described tibia support comprises tibia support platform and the stabilizer location division vertical with tibia support platform; Described condyle of femur engages with the upper end of described tibia liner; The lower end of described tibia liner engages with described tibia support platform; Described condyle of femur, described tibia liner and described tibia support are formed by macromolecular material, and wherein said condyle of femur and described tibia support are made up of polyether-ether-ketone or derivatives thereof, and described tibia liner is made up of ultra-high molecular weight polyethylene; The sliding surface of described condyle of femur to described tibia liner has buffering, described tibia support can fine motion to the stationary plane of described tibia liner, and to the sliding surface of described tibia liner and described tibia support, the jogging motion to the stationary plane of described tibia liner matches described condyle of femur.
Further, described combination type full stress-strain macromolecular material artificial knee joint also comprises patella, and wherein said patella is made up of ultra-high molecular weight polyethylene, and described patella is bonded on the upper end of described condyle of femur.
Further, X-photodevelopment additive is also comprised in described condyle of femur and described tibia support.
Further, the left and right sides of described condyle of femur arranges clip slot; Described clip slot comprises and the metal of its form fit or ceramic stiffener.
Further, described tibia support platform upper end sidewall comprises one or more metal band-shaped parts.
Further, the intersection of described outer end, stabilizer location division and described tibia support platform comprises metal rib; The intracardiac metal material reinforcing prop be provided with perpendicular to described tibia support platform in described stabilizer location division.
Further, height and the thickness of described metal band-shaped parts are not less than 0.5mm, are not more than 3.0mm.
Further, described metal material reinforcing prop diameter is not less than 1.0mm, is not more than 10mm.
Further, described metal reinforcement, described metal rib and described metal material reinforcing prop and described metal band-shaped parts are formed by biocompatibility metal or its alloy.
Further, described metal or its alloy comprise vitallium, titanium or titanium alloy, tantalum or tantalum alloy, rustless steel and zirconium-niobium alloy.
Owing to adopting above technical scheme, the beneficial effects of the utility model are:
1) major part of all implants parts of artificial knee joint that this utility model provides all is made up of macromolecular material, thus reduces allergy, toxicity problem that metal erosion and metal may cause;
2) elastic modelling quantity and the natural bone of the PEEK in this utility model match, and alleviate stress shielding problem;
3) the PEEK condyle of femur in this utility model and tibia support reduce wear problem to the sliding friction surface of UHMWPE tibia liner and stationary plane;
4) all implants parts be all made up of high-molecular organic material in this utility model do not cause interference to NMR (Nuclear Magnetic Resonance)-imaging.
Accompanying drawing explanation
The schematic diagram of the combination type full stress-strain macromolecular material artificial knee joint structure that Fig. 1 provides for this utility model;
Fig. 2 is the top view of the condyle of femur in this utility model, it illustrates the structural representation of condyle of femur both sides metal inlay;
Fig. 3 is the structural representation of condyle of femur in this utility model;
Fig. 4 is the structural representation that in this utility model, tibia support platform upper end sidewall is bumped into metal band-shaped parts;
Fig. 5 is the profile of this utility model Fig. 4 structure;
Fig. 6 is the structural representation being bumped into metal material reinforcing prop in this utility model Fig. 1 structure in the fixed leg of tibia support lower end;
Description of reference numerals
1 patella, 2 condyles of femur, 3 tibia liners, 4 tibia supports, 5 stabilizer location divisions, 6 tibia support platforms, 21 metal inlay, 22 metal inlay, 41 metal material reinforcing props, 42 metal band-shaped parts.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, this utility model is described in further detail.Should be appreciated that specific embodiment described herein only in order to explain this utility model, and be not used in restriction this utility model.
As shown in Fig. 1,3 and 6, a kind of combination type full stress-strain macromolecular material artificial knee joint that this utility model provides, comprise condyle of femur 2, tibia liner 3, tibia support 4 and patella 1, wherein tibia support 4 comprises tibia support platform 6 and has the stabilizer location division 5 of a uniform section, and this stabilizer location division 5 is arranged on the below of tibia support platform 6 and vertical with tibia support platform 6, for by tibia support 4, and then whole artificial knee joint is fixed on skeleton; The upper end of condyle of femur 2 engages with patella 1; The lower end of condyle of femur 2 engages with the upper end of tibia liner 3; The lower end of tibia liner 3 engages with tibia support platform 6; Condyle of femur 2, tibia liner 3, tibia support 4 and patella 1 are formed by macromolecular material, and wherein condyle of femur 2 and tibia support 4 are made up of polyether-ether-ketone (PEEK) or derivatives thereof; Tibia liner 3 and patella 1 are made up of ultra-high molecular weight polyethylene (UHMWPE).
In addition, in this utility model, the sliding surface of condyle of femur 2 pairs of tibia liners 3 has buffering, the stationary plane of tibia support 4 pairs of tibia liners 3 can fine motion, the buffering of sliding surface can control the micrometric displacement between tibia support 4 pairs of tibia liners 3, because sports load can effectively conduct down by PEEK tibia support 4, so the jogging motion of the stationary plane of the sliding surface of condyle of femur 2 pairs of tibia liners 3 and tibia support 4 pairs of tibia liners 3 matches, thus the alternating shear reduced because Multidirectional motion causes, greatly reduce the overall wear that polyethylene tibia liner 3 two is surperficial.
By technique scheme, can obtain according to ISO14243 standard testing, the surperficial wear extent of two of polyethylene tibia liner 3 has been reduced to 5.0 ± 1.2mm
3/ million, the CoCrMo being significantly better than using at present is to poly wear extent 9.0 ± 4.0mm
3/ million, therefore, can predict, the knee joint life-span based on wearing and tearing can reach 40 years from current 20 years.This provide enough the probability of the complete knee joint system Clinical practice based on PEEK material.
In addition, adopt technique scheme, the clinical problem caused is used owing to decreasing metal material, such as, the sensitivity of metal ion, toxicity, problems such as pseudotumor and because the elastic modelling quantity (3GPa) of PEEK material is well below metal (200GPa) with the elastic modelling quantity of bone similar (0.8 ~ 17GPa), so adopt the tibia support 4 of PEEK can reduce the stress shielding of tibia, avoid bone resorption, thus reach more than the fixed effect good for a long time of 30 years; The knee joint system that overall height Molecularly Imprinted Polymer is formed can be widely used in different patient by these advantages, especially young patient, and does not need clinical overhauling; This not only can reduce the misery of patient, can also greatly reduce medical treatment cost.
In addition, in technique scheme, the PEEK condyle of femur 2 in this utility model can solve two potential Clinical practice problems by further optimal design.The imaging problem of the first, PEEK condyle of femur, 2 pairs of X-light; The second, PEEK condyle of femur 2 in operation process with surgical clamping device in conjunction with problem.In clinical and the X-photodevelopment of postoperative macromolecular material implants be normally bumped into tantalum bead (Ta) in region of interest and solve.In this utility model, the combination between condyle of femur 2 and surgical clamping device is realized by the clip slot in condyle of femur 2 left and right sides.But, because the hardness of PEEK and intensity are far below the surgical clamping device made by metal material (surgical clamping device is generally made up of rustless steel) in implementation procedure, so there is the risk be damaged in operation in the cell wall that PEEK clip slot is made.In order to the risk solving X-photodevelopment problem He prevent PEEK condyle of femur clamping trough wall to be damaged in operation, this utility model adds following structure in technique scheme: as shown in Figure 2, and PEEK condyle of femur 2 both sides are provided with metal inlay 21 and 22; The thickness of metal inlay 21 and 22 is all not less than 0.5mm, is not more than 3.0mm; Metal inlay 21 and 22 is made up of the metal of biocompatibility or its alloy, such as cobalt chrome molybdenum (CoCrMo) alloy, titanium or titanium alloy, tantalum or tantalum alloy, rustless steel, zirconium-niobium alloy etc.Based on said structure, the PEEK condyle of femur 2 of metal inlay 21 and 22 will complete X-photodevelopment and prevent surgical clamping device to the double effects of condyle of femur 2 latent lesion.
In technique scheme, the PEEK tibia support 4 in this utility model also can solve two potential problems by further optimal design: the visualization problems of the first, PEEK tibia support, 4 pairs of X-light; Fixation problem between the second, PEEK tibia support 4 and ultra-high molecular weight polyethylene (UHMWPE) tibia liner 3.In this utility model, as shown in Figures 4 and 5, in PEEK tibia support 4 mesa sidewalls (with tibia liner joint portion in operation), particularly front side wall is bumped into metal band-shaped parts 42, metal band-shaped parts 42 can be parts, also can be multiple parts; Metal band-shaped parts 42, to be not less than the height of 0.5mm and thickness or diameter, are no more than the height of 3.0mm and thickness or diameter for best; Metal band-shaped parts 42 are made up of the metal or its alloy with biocompatibility, such as cobalt chrome molybdenum (CoCrMo) alloy, titanium or titanium alloy, rustless steel, tantalum or tantalum alloy, zirconium-niobium alloy etc.Based on said structure, the PEEK tibia support 4 being bumped into metal sidewall will complete the development of X-light and the fixing double effects between reinforcing and polyethylene tibia liner 3.
Further, in technique scheme, as shown in Figure 6, metal rib (not shown) is inlaid with at the intersection of outer end, stabilizer location division 5 and tibia support platform 6, the intracardiac metal material reinforcing prop 41 be provided with perpendicular to tibia support platform 6 in stabilizer location division 5, the diameter of metal material reinforcing prop 41 had better not be less than 1.0mm, is not greater than 10.0mm; Metal material reinforcing prop 41 such as, for having metal or its alloy formation of biocompatibility, cobalt chrome molybdenum (CoCrMo), titanium or titanium alloy, tantalum or tantalum alloy, rustless steel, zirconium-niobium alloy etc.Based on said structure, the PEEK tibia support 4 being bumped into metal material reinforcing prop 41 will complete the development of X-light and the double effects strengthening PEEK fixed leg bearing capacity (clash in operation and Post operation moves stressed).
Therefore, this utility model solves the clamping problem in polymer operation process further, not damage polymer prosthesis, solves clinical actual use problem.This utility model also solves the postoperative visualization problems of polymer prosthesis, to observe surgical effect and the long service of prosthese in human body simultaneously.
The foregoing is only preferred embodiment of the present utility model, be not used for limiting practical range of the present utility model; If do not depart from spirit and scope of the present utility model, this utility model is modified or equivalent to replace, in the middle of the protection domain that all should be encompassed in this utility model claim.
Claims (10)
1. a combination type full stress-strain macromolecular material artificial knee joint, is characterized in that, comprise condyle of femur, tibia liner and tibia support, wherein:
Described tibia support comprises tibia support platform and the stabilizer location division vertical with tibia support platform; Described condyle of femur engages with the upper end of described tibia liner; The lower end of described tibia liner engages with described tibia support platform; Described condyle of femur, described tibia liner and described tibia support are formed by macromolecular material, and wherein said condyle of femur and described tibia support are made up of polyether-ether-ketone or derivatives thereof, and described tibia liner is made up of ultra-high molecular weight polyethylene; The sliding surface of described condyle of femur to described tibia liner has buffering, described tibia support can fine motion to the stationary plane of described tibia liner, and to the sliding surface of described tibia liner and described tibia support, the jogging motion to the stationary plane of described tibia liner matches described condyle of femur.
2. combination type full stress-strain macromolecular material artificial knee joint according to claim 1, it is characterized in that, described combination type full stress-strain macromolecular material artificial knee joint also comprises patella, and wherein said patella is made up of ultra-high molecular weight polyethylene, and described patella is bonded on the upper end of described condyle of femur.
3. combination type full stress-strain macromolecular material artificial knee joint according to claim 1, is characterized in that, also comprises X-photodevelopment additive in described condyle of femur and described tibia support.
4. combination type full stress-strain macromolecular material artificial knee joint according to claim 1, it is characterized in that, the left and right sides of described condyle of femur is provided with clip slot; Described clip slot comprises and the metal of its form fit or ceramic stiffener.
5. combination type full stress-strain macromolecular material artificial knee joint according to claim 1, is characterized in that, described tibia support platform upper end sidewall comprises one or more metal band-shaped parts.
6. combination type full stress-strain macromolecular material artificial knee joint according to claim 1, it is characterized in that, the intersection of described outer end, stabilizer location division and described tibia support platform comprises metal rib; The intracardiac metal material reinforcing prop be provided with perpendicular to described tibia support platform in described stabilizer location division.
7. combination type full stress-strain macromolecular material artificial knee joint according to claim 5, is characterized in that, height and the thickness of described metal band-shaped parts are not less than 0.5mm, are not more than 3.0mm.
8. combination type full stress-strain macromolecular material artificial knee joint according to claim 6, is characterized in that, described metal material reinforcing prop diameter is not less than 1.0mm, is not more than 10mm.
9. the combination type full stress-strain macromolecular material artificial knee joint according to claim 4 or 6 or 7, it is characterized in that, described metal reinforcement, described metal rib and described metal material reinforcing prop and described metal band-shaped parts are formed by biocompatibility metal or its alloy.
10. combination type full stress-strain macromolecular material artificial knee joint according to claim 9, it is characterized in that, described metal or its alloy comprise vitallium, titanium or titanium alloy, tantalum or tantalum alloy, rustless steel and zirconium-niobium alloy.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104887354A (en) * | 2015-02-10 | 2015-09-09 | 江苏奥康尼医疗科技发展有限公司 | Combined fully organic high molecular material artificial knee joint |
| CN107898537A (en) * | 2017-11-09 | 2018-04-13 | 赵玉芯 | A kind of joint prosthesis platform gasket assembly |
| US20190298531A1 (en) * | 2018-03-28 | 2019-10-03 | Russell Nevins | Modular, all-poly knee replacement |
| US10531959B2 (en) | 2018-03-28 | 2020-01-14 | Russell Nevins | Modular, plastic knee replacement with locking mechanism |
| WO2023067612A1 (en) * | 2021-10-18 | 2023-04-27 | Meril Healthcare Pvt. Ltd | Implant imaging system |
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| CN104887354A (en) * | 2015-02-10 | 2015-09-09 | 江苏奥康尼医疗科技发展有限公司 | Combined fully organic high molecular material artificial knee joint |
| WO2016127282A1 (en) * | 2015-02-10 | 2016-08-18 | 江苏奥康尼医疗科技发展有限公司 | Combined fully organic high molecular material artificial knee joint |
| CN104887354B (en) * | 2015-02-10 | 2017-06-30 | 江苏奥康尼医疗科技发展有限公司 | A kind of combined type high-molecular organic material artificial knee joint |
| CN107898537A (en) * | 2017-11-09 | 2018-04-13 | 赵玉芯 | A kind of joint prosthesis platform gasket assembly |
| US20190298531A1 (en) * | 2018-03-28 | 2019-10-03 | Russell Nevins | Modular, all-poly knee replacement |
| US10531959B2 (en) | 2018-03-28 | 2020-01-14 | Russell Nevins | Modular, plastic knee replacement with locking mechanism |
| WO2023067612A1 (en) * | 2021-10-18 | 2023-04-27 | Meril Healthcare Pvt. Ltd | Implant imaging system |
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