CN205094719U - Preartis matching type artificial knee joint femoral prosthesis - Google Patents
Preartis matching type artificial knee joint femoral prosthesis Download PDFInfo
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- CN205094719U CN205094719U CN201520372092.6U CN201520372092U CN205094719U CN 205094719 U CN205094719 U CN 205094719U CN 201520372092 U CN201520372092 U CN 201520372092U CN 205094719 U CN205094719 U CN 205094719U
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Abstract
The utility model relates to a preartis matching type artificial knee joint femoral prosthesis, include: entocondyle portion, external condyle portion, front wing, coaster and postartis portion, wherein the front wing is followed entocondyle portion and external condyle portion front end extend inwards and pass through the constitution is connected to the coaster, postartis portion is followed entocondyle portion and external condyle portion rear end are extended inwards and are connected the component, it has the fossa intercondyloidea to inject between entocondyle portion and the external condyle portion, the thickness of front wing with anteroposterior diameter between front wing and the postartis portion has the negative correlation. The utility model discloses making femoral prosthesis's front wing thickness reduce gradually along with the increase of false body anteroposterior diameter, according with the thighbone characteristics of dissecting more, can improve the articular mechanical properties of kneecap thigh and thighbone the place ahead excessively fills or the insufficient fill, reduces complication such as the preceding grief of knee, joint motion range obstacle, improves postsurgical clinical effect.
Description
Technical field
This utility model relates to technical field of medical instruments, more particularly, relates to a kind of preartis matching type artificial knee-joint thighbone prosthese.
Background technology
Total knee replacement is a kind of bone surgery that is very ripe, that extensively should carry out, has become the effective ways for the treatment of osteoarthritis in late period, can alleviate the slight illness of patient, improve function, improve the quality of living.The 10-15 survival rate of current artificial knee joint prosthesis can reach 85%-90%, and this is closely related with surgical technic and prosthetic designs.Artificial knee joint replacement is through the development of more than 40 years, and surgical technic is quite ripe, and improving prosthetic designs further becomes the raising artificial knee joint life-span, improves the subject matter of postoperative effect.Artificial knee joint prosthesis design in recent years progress is rapid, along with people are to the further understanding of knee joint biomechanics and dissection, the function of patient to artificial knee joint has further requirement, and the knee joint replacement prosthesis designing the biomechanics and anatomical features more meeting motion of knee joint becomes the emphasis of research.Whether femoral prosthesis size mates one of focus becoming research with knee joint morphology.Prosthese and knee joint morphology do not mate and can cause the suspension of prosthese or cover incomplete.Prosthese hangs to increase and weares and teares with surrounding soft tissue, produces pain, affects soft tissue balance.Prosthese covers and does not entirely cause sclerotin to expose, and early stage increase osteotomy surface is hemorrhage, and late period, prosthese was sitting on the spongy bone of intensity difference, and sclerotin subsides, and sank, and causes the line of force disorderly.Finally cause the wearing and tearing of prosthese, shortening in service life, even cause the possibility that prosthese is overhauled.The design of current femoral prosthesis mainly concentrates on ratio, the aspect such as prosthese front wing thickness and coaster ditch of condyle of femur internal-and external diameter and anteroposterior diameter.
The design of prosthese front wing is one of emphasis improving prosthese research.In total knee replacement operation, femoral prosthesis front wing thickness is equal with the femur preartis thickness of amputation in principle.Prosthese front wing thickness is greater than the preartis thickness of amputation, causes femur front overfill, causes the gonalgia, range of motion obstacle; Prosthese front wing thickness is less than the preartis thickness of amputation, causes insufficient fill, and the quadriceps femoris moment arm of force reduces, stretches knee joint obstacle etc.There is the artificial knee-joint thighbone prosthese of multiple manufacturer production both at home and abroad all based on white people's knee joint human knee joint anatomic form design data at present, although the femoral prosthesis size of each producer is different, but the front wing thickness of all knee joint femoral prosthesis and prosthesis size and femoral prosthesis anteroposterior diameter are directly proportional, and namely prosthese front wing thickness increases along with the increase of femoral prosthesis anteroposterior diameter.
But, by iconography and anatomic measurement knee joint femoral and tibia form known, compare with westerner's anatomical data, compatriots' knee joint morphology parameter and west white people have obvious difference.The design of each brand prosthese in the market, the front wing thickness being all large size prosthese is also larger, many clinical trials prove that the existing prosthese of application carries out displacement and will cause: large model femoral prosthesis causes femur front overfill, and ting model prosthese causes femur front insufficient fill.Therefore, existing femoral prosthesis size characteristic and be not suitable for the total knee replacement of compatriots.
Utility model content
The technical problems to be solved in the utility model is, front wing design for existing artificial knee-joint thighbone prosthese easily causes the defect of femur front overfill or insufficient fill, the preartis matching type artificial knee-joint thighbone prosthese providing a kind of prosthese front wing thickness to reduce gradually along with the increase of prosthese anteroposterior diameter, makes it more meet the anatomical features of state's human femur preartis.
This utility model solves the technical scheme that its technical problem adopts: construct a kind of preartis matching type artificial knee-joint thighbone prosthese, comprising: inner side condyles, outside condyles, front wing, coaster and rear condyles; Wherein said front wing is extended inwards from described inner side condyles and condyles front end, outside and is connected and composed by described coaster; Described rear condyles extends inwards from described inner side condyles and condyles rear end, outside and connects and composes; Intercondylar fossa is limited with between described inner side condyles and outside condyles; The thickness of described front wing and the anteroposterior diameter between described front wing and rear condyles have negative correlation.
According in preartis matching type artificial knee-joint thighbone prosthese described in the utility model, the thickness of front wing and the correlation coefficient r of described anteroposterior diameter of described preartis matching type artificial knee-joint thighbone prosthese are-0.08 ~-0.15.
According in preartis matching type artificial knee-joint thighbone prosthese described in the utility model, described front wing comprise extend inwards from condyles front end, described inner side before inner wing, and outer wing before extending inwards from condyles front end, described outside.
According in preartis matching type artificial knee-joint thighbone prosthese described in the utility model, described front inner wing and front outer wing are the design symmetry that thickness is equal.
According in preartis matching type artificial knee-joint thighbone prosthese described in the utility model, described front inner wing and front outer wing design for unsymmetry, and the thickness of described front outer wing is greater than described front inner wing thickness; The thickness of described front inner wing is 8mm ~ 4mm, and the thickness of described front outer wing is 9mm ~ 5mm.
According in preartis matching type artificial knee-joint thighbone prosthese described in the utility model, thickness Y1 and the described anteroposterior diameter d1 of described front inner wing meet following relation: Y1=-0.58d1+34.13; Thickness Y2 and the described anteroposterior diameter d1 of described front outer wing meet following relation: Y2=-0.38d1+26.10.
According in preartis matching type artificial knee-joint thighbone prosthese described in the utility model, described anteroposterior diameter is respectively 43.5mm, 46.5mm, 49.5mm, 53.5mm or 58.5mm, the thickness of described front inner wing corresponds to 8mm, 7mm, 6mm, 5mm or 4mm respectively, and the thickness of described front outer wing corresponds to 9mm, 8mm, 7mm, 6mm or 5mm respectively.
According in preartis matching type artificial knee-joint thighbone prosthese described in the utility model, the surface, inboard of described inner side condyles and outside condyles has fenestral fabric.
According in preartis matching type artificial knee-joint thighbone prosthese described in the utility model, the surface, inboard of described inner side condyles and outside condyles is also respectively equipped with cylindrical projections.
According in preartis matching type artificial knee-joint thighbone prosthese described in the utility model, described preartis matching type artificial knee-joint thighbone prosthese is made up of vitallium, nickel cobalt (alloy), rustless steel or titanium alloy.
Implement preartis matching type artificial knee-joint thighbone prosthese of the present utility model, there is following beneficial effect: femoral prosthesis front wing thickness of the present utility model reduces gradually along with the increase of prosthese anteroposterior diameter, the thickness of femoral prosthesis front wing and human body knee joint femur front ankle bone cutting thickness are matched, more meet femur anatomical features, the mechanical property of patellofemoral joint and femur front overfill or insufficient fill can be improved, reduce the complication such as knee joint front pain, range of motion obstacle, improve postoperative clinical effect.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the axonometric chart of the preartis matching type artificial knee-joint thighbone prosthese according to this utility model preferred embodiment;
Fig. 2 is the rearview of the preartis matching type artificial knee-joint thighbone prosthese according to this utility model preferred embodiment;
Fig. 3 a and 3b is respectively and schemes according to the first embodiment of preartis matching type artificial knee-joint thighbone prosthese of the present utility model and the size comparison of the second embodiment.
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 further elaborated.
Refer to Fig. 1 and 2, be respectively the axonometric chart according to the preartis matching type artificial knee-joint thighbone prosthese of this utility model preferred embodiment and rearview.As shown in the figure, the preartis matching type artificial knee-joint thighbone prosthese that this embodiment provides, referred to as femoral prosthesis, comprises inner side condyles 1, outside condyles 2, front wing, coaster 3 and rear condyles.Wherein front wing is extended inwards from the front end of inner side condyles 1 and outside condyles 2 and is connected and composed by coaster 3.As in Fig. 1 and 2, front wing can comprise further extend inwards from inner side condyles 1 front end before inner wing 4, and outer wing 5 before extending inwards from outside condyles 2 front end, front inner wing 4 and front outer wing 5 are linked into an integrated entity by coaster 3.Rear condyles extends and the formation that links into an integrated entity inwards from the rear end of inner side condyles 1 and outside condyles 2.As in Fig. 1 and Fig. 2, rear condyles can comprise further to extend inwards from the rear end of inner side condyles 1 in after condyles 6, and the outer rear condyles 7 extended inwards from the rear end of outside condyles 2.Intercondylar fossa 8 is limited with between inner side condyles 1 and outside condyles 2.Preferably, fenestral fabric 9 can be provided with on the surface, inboard of inner side condyles 6 and outside condyles 7, during to increase installation and the contact area in femur cross section, make immobile interface more firm.In preferred embodiments more of the present utility model, cylindrical projections 10 can also be respectively equipped with on the surface, inboard of inner side condyles 6 and outside condyles 7, as being provided with two cylindrical projections 10 in Fig. 2, to match fixing with the femur after osteotomy.This preartis matching type artificial knee-joint thighbone prosthese can be made for vitallium, nickel cobalt (alloy), rustless steel or titanium alloy, and other material also can be selected to make.
A unique distinction of the present utility model is that the thickness d 2 of front wing has negative correlation with femoral prosthesis size.Under normal circumstances, represent femoral prosthesis size with the distance between front wing and rear condyles and anteroposterior diameter d1, thickness maximum in former inner wing 4 and front outer wing 5 is as the thickness d 2 of front wing.Therefore in this utility model, the thickness d 2 of front wing and the anteroposterior diameter d1 between front wing and rear condyles have negative correlation.That is, increase different from current femoral prosthesis front wing thickness d 2 both at home and abroad along with the increase of prosthese anteroposterior diameter d1, in this utility model, femoral prosthesis front wing thickness d 2 reduces gradually along with the increase of prosthesis size.
For in the structural design of femoral prosthesis; the quality of the geometry designs of femoral prosthesis front wing not only will directly affect the normal activity of patellofemoral joint; and the proper motion of whole artificial knee joint and the realization of mechanics function can be affected, be one of key factor implementing total knee replacement success or not.This utility model proposes based on a large amount of data analysiss and experimental result.This utility model is by anatomic measurement data in the routine total knee replacement surgery of analysis 1402, and find that the osteotomy thickness of femur preartis reduces, the patient that namely skeletal form is larger along with the increase of condyle of femur anteroposterior diameter, the thickness of its femur preartis is less on the contrary.And the design of each brand prosthese in the market, the front wing thickness being all large size prosthese is also larger, apply existing prosthese to replace, large model femoral prosthesis will be caused to cause femur front overfill, and ting model prosthese causes femur front insufficient fill.The thickness d 2 being arranged on the prosthese front wing at femur preartis position in this utility model reduces gradually along with the increase of prosthese anteroposterior diameter d1, more meet the anatomical features of femur preartis, femur front overfill or insufficient fill can be improved, its shape and structure is made more to be applicable to patient, reduce the complication such as knee joint front pain, range of motion obstacle, improve postoperative clinical function, improve surgical effect.
Incorporated by reference to consulting Fig. 3 a and 3b, being respectively and scheming according to the first embodiment of preartis matching type artificial knee-joint thighbone prosthese of the present utility model and the size comparison of the second embodiment.Wherein the anteroposterior diameter d1 of the preartis matching type artificial knee-joint thighbone prosthese of Fig. 3 b second embodiment is greater than the anteroposterior diameter of Fig. 3 a first embodiment, and the prosthese front wing thickness d 2 of the second embodiment is less than the front wing thickness of the first embodiment.That is, in this utility model, femoral prosthesis front wing thickness d 2 reduces gradually along with the increase of prosthese anteroposterior diameter d1.
More preferably, in this utility model, the front wing thickness d 2 of preartis matching type artificial knee-joint thighbone prosthese is-0.08 to-0.15 with the correlation coefficient r of anteroposterior diameter d1.Namely when preartis matching type artificial knee-joint thighbone prosthese of the present utility model is made into product sale, it is-0.08 to-0.15 that the statistical data that multiple product is such as same batch needs to meet front wing thickness d 2 with the correlation coefficient r of anteroposterior diameter d1, and p<0.05.This is consistent with morphological measurement result.Draw by analyzing anatomic measurement data in 1402 routine total knee replacement surgeries, before compatriots, lateral condyle thickness distribution is 1 ~ 16.2mm, and wherein male's median is 8.5mm, and women's median is 7.0mm; Front medial condyle thickness distribution is 0 ~ 13mm, and wherein male's median is 4.0mm, and women's median is 3.5mm.Before Spearman Correlation analysis showed men and women property, before medial condyle and women, lateral condyle and femoral size have negative correlation, and correlation coefficient r=-0.08 ~-0.15, p<0.05.Although lateral condyle and femoral size non-correlation (p>0.05) before male, the front lateral condyle thickness that still there is queen size femur is less than the trend of junior size femur.Due to femoral prosthesis when mounted, its front inner wing coordinates with front medial condyle, and front outer wing coordinates with front lateral condyle, therefore when adopt there is the front wing thickness d 2 of above-mentioned correlation coefficient time, the matching degree of femoral prosthesis and femur can be improved, be more conducive to postoperative stablizing.More specifically, this utility model is when preparing the preartis matching type artificial knee-joint thighbone prosthese that women is suitable for, and it is-0.08 ~-0.15 that the thickness of its front inner wing 4 and front outer wing 5 can be made all to meet with the correlation coefficient r of anteroposterior diameter d1.When preparing the preartis matching type artificial knee-joint thighbone prosthese be suitable for of male, both only can meet the thickness of its front inner wing 4 and the correlation coefficient r of anteroposterior diameter d1 is-0.08 ~-0.15, it is-0.08 ~-0.15 that the thickness of its front inner wing 4 and front outer wing 5 also can be made all to meet with the correlation coefficient r of anteroposterior diameter d1.
In embodiments more of the present utility model, front inner wing 4 and front outer wing 5 can be design symmetry, and namely, the thickness of inner wing 4 and front outer wing 5 is equal.
In other embodiments of the present utility model, front inner wing 4 and front outer wing 5 can adopt unsymmetry to design, and namely, the thickness of outer wing 5 is greater than the thickness of described front inner wing 4.Preferably, the thickness of front inner wing 4 is 8mm ~ 4mm, and the thickness of front outer wing 5 is 9mm ~ 5mm.
In some embodiments of asymmetrical design, from unitary analysis after the measurement data of man, women merges by this utility model, and in conjunction with factors such as prosthetic designs basic demand and coverage rates, shown that the approximate fits equation of front inner wing and prosthese anteroposterior diameter is Y1=-0.58d1+34.13, front outer wing and prosthese anteroposterior diameter approximate fits equation are Y2=-0.38d1+26.10.Experiment proves, adopt the front inner wing of above-mentioned Equation for Calculating and front outer wing size, the matching degree of its prosthese preartis is high, does not occur that patellofemoral joint transition is filled and causes postoperative hypertonia, or patellofemoral joint filling deficiency causes postoperatively stretching the situations such as knee joint is unable.
In other embodiments of asymmetrical design, this utility model is drawn by anatomic measurement data in the routine total knee replacement surgery of analysis 1402, state's human femur anteroposterior diameter scope is between 40 ~ 62.5mm, be the principle of Perfect Matchings within covering 3mm according to prosthese, more than 90% crowd need be contained for target with prosthetic designs, state's human femur anteroposterior diameter is divided into A, B, C, D, E five groups, namely anteroposterior diameter d1 is respectively 43.5mm, 46.5mm, 49.5mm, 53.5mm and 58.5mm.And along with the increase of prosthese anteroposterior diameter d1, the thickness d 2 of front wing is successively decreased with 1mm.Particularly, the thickness of the front inner wing 4 of A, B, C, D, E five groups corresponds to 8mm, 7mm, 6mm, 5mm and 4mm respectively, and the thickness of front outer wing 5 corresponds to 9mm, 8mm, 7mm, 6mm and 5mm respectively.
This utility model is also shown by a series of preliminary experiment, use preartis matching type artificial knee-joint thighbone prosthese of the present utility model be expert at compatriots' knee prosthesis time, the coupling of preartis is better, avoid patellofemoral joint transition to fill, postoperative patellofemoral joint hypertonia, or patellofemoral joint filling is not enough, postoperative generation of stretching the situations such as knee joint is unable, the problem such as incidence rate for pain before whether can improving the satisfaction of knee prosthesis patient and knee joint also will carry out further clinical verification.
This utility model is described according to specific embodiment, but it will be understood by those skilled in the art that when not departing from this utility model scope, can carry out various change and equivalent replacement.In addition, for adapting to specific occasion or the material of this utility model technology, can many amendments be carried out to this utility model and not depart from its protection domain.Therefore, this utility model is not limited to specific embodiment disclosed herein, and comprises all embodiments dropping into claims.
Claims (10)
1. a preartis matching type artificial knee-joint thighbone prosthese, is characterized in that, comprising: inner side condyles, outside condyles, front wing, coaster and rear condyles; Wherein said front wing is extended inwards from described inner side condyles and condyles front end, outside and is connected and composed by described coaster; Described rear condyles extends inwards from described inner side condyles and condyles rear end, outside and connects and composes; Intercondylar fossa is limited with between described inner side condyles and outside condyles; The thickness of described front wing and the anteroposterior diameter between described front wing and rear condyles have negative correlation.
2. preartis matching type artificial knee-joint thighbone prosthese according to claim 1, is characterized in that, the thickness of front wing and the correlation coefficient r of described anteroposterior diameter of described preartis matching type artificial knee-joint thighbone prosthese are-0.08 ~-0.15.
3. preartis matching type artificial knee-joint thighbone prosthese according to claim 1, is characterized in that, described front wing comprise extend inwards from condyles front end, described inner side before inner wing, and outer wing before extending inwards from condyles front end, described outside.
4. preartis matching type artificial knee-joint thighbone prosthese according to claim 3, it is characterized in that, described front inner wing and front outer wing are the design symmetry that thickness is equal.
5. preartis matching type artificial knee-joint thighbone prosthese according to claim 3, is characterized in that, described front inner wing and front outer wing design for unsymmetry, and the thickness of described front outer wing is greater than described front inner wing thickness; The thickness of described front inner wing is 8mm ~ 4mm, and the thickness of described front outer wing is 9mm ~ 5mm.
6. Total knee arthroplasty artificial knee-joint thighbone prosthese according to claim 5, is characterized in that, thickness Y1 and the described anteroposterior diameter d1 of described front inner wing meet following relation: Y1=-0.58d1+34.13; Thickness Y2 and the described anteroposterior diameter d1 of described front outer wing meet following relation: Y2=-0.38d1+26.10.
7. Total knee arthroplasty artificial knee-joint thighbone prosthese according to claim 5, it is characterized in that, described anteroposterior diameter is respectively 43.5mm, 46.5mm, 49.5mm, 53.5mm or 58.5mm, the thickness of described front inner wing corresponds to 8mm, 7mm, 6mm, 5mm or 4mm respectively, and the thickness of described front outer wing corresponds to 9mm, 8mm, 7mm, 6mm or 5mm respectively.
8. preartis matching type artificial knee-joint thighbone prosthese according to claim 1, it is characterized in that, the surface, inboard of described inner side condyles and outside condyles has fenestral fabric.
9. preartis matching type artificial knee-joint thighbone prosthese according to claim 5, it is characterized in that, the surface, inboard of described inner side condyles and outside condyles is also respectively equipped with cylindrical projections.
10. preartis matching type artificial knee-joint thighbone prosthese according to claim 1, is characterized in that, described preartis matching type artificial knee-joint thighbone prosthese is made up of vitallium, nickel cobalt (alloy), rustless steel or titanium alloy.
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| CN201520372092.6U CN205094719U (en) | 2015-06-02 | 2015-06-02 | Preartis matching type artificial knee joint femoral prosthesis |
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| CN201520372092.6U CN205094719U (en) | 2015-06-02 | 2015-06-02 | Preartis matching type artificial knee joint femoral prosthesis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105662657A (en) * | 2015-06-02 | 2016-06-15 | 北京大学第三医院 | Preartis-matching femoral prosthesis for artificial knee joint |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105662657A (en) * | 2015-06-02 | 2016-06-15 | 北京大学第三医院 | Preartis-matching femoral prosthesis for artificial knee joint |
| CN105662657B (en) * | 2015-06-02 | 2018-05-08 | 北京大学第三医院 | A kind of preartis matching type artificial knee-joint thighbone prosthese |
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Effective date of registration: 20180905 Address after: 100191 49 Garden Road North, Haidian District, Beijing. Patentee after: The Third Affiliated Hospital of Peking University Address before: 100191 49 Garden Road North, Haidian District, Beijing. Co-patentee before: South China University of Technology Patentee before: The Third Affiliated Hospital of Peking University |
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Effective date of registration: 20190919 Address after: 100082 Beijing city Haidian District Deshengmen West Street No. 15 ocean scenery area 8-2-1201 room Patentee after: Beijing Natong Technology Group Co., Ltd. Address before: 100191 No. 49 Garden North Road, Beijing, Haidian District Patentee before: The Third Affiliated Hospital of Peking University |
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Effective date of registration: 20220209 Address after: G325, 3rd floor, building 1, yard 9, CHENGWAN street, Haidian District, Beijing 100082 Patentee after: BEIJING NATON TECHNOLOGY GROUP Co.,Ltd. Patentee after: Natong Biotechnology (Beijing) Co., Ltd Address before: 100082 room 8-2-1201, ocean view area 15, Desheng West Street, Haidian District, Beijing. Patentee before: BEIJING NATON TECHNOLOGY GROUP Co.,Ltd. |