CN103598935A - Patella prosthesis structure - Google Patents
Patella prosthesis structure Download PDFInfo
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- CN103598935A CN103598935A CN201310554234.6A CN201310554234A CN103598935A CN 103598935 A CN103598935 A CN 103598935A CN 201310554234 A CN201310554234 A CN 201310554234A CN 103598935 A CN103598935 A CN 103598935A
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- patella
- main part
- fixed leg
- patellar prosthesis
- prosthesis structure
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Abstract
The invention is suitable for the technical field of artificial joints and discloses a patella prosthesis structure which comprises a main body portion used for being matched with remaining patella of a human body after patella cutting. The main body portion has a binding face bound with the remaining patella of the human body, fixing columns used for being inserted into hole sites of the remaining patella of the human body are fixedly arranged on the binding face, and each of the main body portion and the fixing columns has a porous structure which has multiple mutually-communicated holes. By arranging the main body portion and the fixing columns both having the porous structures, bone tissue of a patient can grow inside the holes of the porous structures; by allowing the bone tissue to grow inside the main body portion and the fixing columns, binding force of the main body portion and the bone tissue can be effectively increased, good biological fixing effect can be formed to avoid breakaway and breakage of the patella prosthesis structure, better biological fixing effect is realized by means of bone ingrowth, and the patella prosthesis structure is high in reliability.
Description
Technical field
The invention belongs to artificial joint technical field, relate in particular to a kind of patellar prosthesis structure.
Background technology
Patellar prosthesis replacement is mainly used in Chondromalacia of patella (CP, chondromalacia patellae), Patellar joint osteoarthritis (Patellofemoral osteroarthritis), Patella fracture, TKA (TKA, total knee arthroplasty) or simple patellar prosthesis are overhauled disease clinical treatments such as (Isolated patellar revision).
Chondromalacia of patella is one of common cause causing the front pain of knee joint, and China's Chondromalacia of patella prevalence reaches 36.2%, and women's sickness rate is higher than male.Patellar joint osteoarthritis is the middle and advanced stage of Chondromalacia of patella, and sickness rate is 5% left and right, and in old people, sickness rate is higher, is the modal cause of disease of pain before knee joint.Patella fracture is mainly by due to direct or indirect violence synergy, how can cause patella transverse fracture, vertical-type fracture, comminuted fracture, account for 1% of all fracture, 20-50 year is group of people at high risk, male's sickness rate is 2 times of women, and serious Patella fracture can adopt part patellectomy or full patellectomy.Simple excision is unfavorable for the recovery of extensor mechanism, especially entirely cut operation and often patient is caused to adverse effect quality of life in later stage, increasing clinical demand requires to carry out facies articularis patellae reconstruction, and artificial whirbone prosthesis replacement is an effective means of dealing with problems.
Early stage patella replacement prosthesis mostly is patella surface replacement, and prosthese is the design of circle shape for hat.Patellar prosthesis forms by justifying shape for hat polyethylene, metallic substrates and some pegs, but shear stress between polyethylene and metallic substrates can cause new complication, for example: the synovitis that polyethylene abrasive dust causes and metallic melanism.33.3% patient need to perform the operation again because the gonalgia and prosthese lose efficacy.Then Johnson & Johnson has released a LCS crimping metal substrate rotation prosthese, and this deisgn product has improved the adaptability of Patellar joint, has reduced footprint pressure, less developing complications in following up a case by regular visits to over a long time.But the patellar prosthesis with metallic substrates can cause polyethylene wear, the fracture at metal-back edge, polyethylene, substrate, the problems such as disengaging of holdfast even, no longer recommended use.
Now widely used is full polyethylene patellar prosthesis, has one to three nail and bone cement and fixes, in order to avoid occurring without the fixing metal substrate prosthese of bone cement the excessive risk of fracture.The full polyethylene patellar prosthesis of bone cement is more durable than metal mold patellar prosthesis.At present, complete poly patellar prosthesis is widely used.The displacement of patella surface prosthesis needs to retain residue patella thickness more than 15 millimeters, otherwise can strengthen the risk of patella fracture, for patella thin and sclerosis, does not advise carrying out the displacement of patella surface prosthesis.In addition the same inapplicable patella surface prosthesis displacement of serious patella tissue defect.
To sum up, current existing patella displacement mostly is incomplete displacement, and the making material of employing is the non-degradable materials such as polyethylene, metal (titanium, tantalum).Yet dome shape for hat prosthese and cadaver patella in Chinese are also inconsistent, although easy for installation, matching is poor.Compare with the TKA of not carrying out patella displacement, Patella fracture, to dislocate, stretch knee joint device fracture, osteonecrosis incidence rate in the TKA that merges patella displacement higher, and there will be the patellas such as patellar prosthesis wearing and tearing, loosening and patella snap to replace peculiar complication, these complication can directly cause the failure of patella displacement.Patellar prosthesis structure of the prior art, there is the equivalent risk that departs from, ruptures, poor reliability in it.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of patellar prosthesis structure is provided, its reliability is high.
Technical scheme of the present invention is: a kind of patellar prosthesis structure, comprise for remaining with human body the main part that patella matches, described main part has the binding face being affixed with described human body residue patella, on described binding face, be fixedly installed the fixed leg that is useful on the Kong Weizhong that inserts described human body residue patella, described main part and described fixed leg all have loose structure, and described loose structure has a plurality of holes that are interconnected.
Alternatively, described fixed leg is shaped in described main part.
Alternatively, described fixed leg is cylindric, and it is provided with two or more, on described human body residue patella, is provided with the cylindrical hole mating with described fixed leg.
Alternatively, described fixed leg is provided with three, is triangular shape and arranges between three described fixed legs.
Alternatively, described main part and described fixed leg are by the molding of metal melting rapid shaping technique.
Alternatively, described main part and described fixed leg are by powder metallurgical technique molding.
Alternatively, described main part and described fixed leg adopt titanium alloy or tantalum alloy by powder metallurgical technique molding.
Alternatively, the outer surface of described main part is smooth surface layer.
Alternatively, the aperture of the hole on described loose structure is 0.2 to 0.35 millimeter.
Alternatively, the porosity of the hole of described loose structure is 40% to 60%.
Patellar prosthesis structure provided by the invention, it has main part and the fixed leg of loose structure by setting, can adopt the medical software of the generation loose structure of CAD software or special use, design has the patellar prosthesis of loose structure, can determine porosity according to patient's patella bone density, require loose structure is interconnected through hole simultaneously, and pore size is suitable for osteocyte and grows into and grow, can the grow into inside of loose structure mesopore of patient's osseous tissue, by allowing osseous tissue the grow into inside of main part and the inside of fixed leg, can effectively increase the adhesion of main part and osseous tissue, form good fixed effect biology, avoid patellar prosthesis structure to depart from, fracture, solved the problem that in prior art, patellar prosthesis anatomic form and natural Patellar joint anatomic form do not match, the mode of also growing into by bone has reached more excellent fixed effect biology, reliability is high.
Accompanying drawing explanation
Fig. 1 is the assembling stereogram of human body residue patella and main part in the patellar prosthesis structure that provides of the embodiment of the present invention;
Fig. 2 is the axonometric chart of main part in the patellar prosthesis structure that provides of the embodiment of the present invention;
Fig. 3 is the axonometric chart of human body residue patella in the patellar prosthesis structure that provides of the embodiment of the present invention;
Fig. 4 is the schematic perspective view of loose structure in the patellar prosthesis structure that provides of the embodiment of the present invention.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
It should be noted that, when element is called as " being fixed on " or " being arranged at " another element, it can be directly on another element or may have centering elements simultaneously.When an element " being connected in " another element of being known as, it can be directly connected to another element or may have centering elements simultaneously.
Also it should be noted that, the orientation term such as left and right, upper and lower in the present embodiment, is only that relative concept or the normal operating condition of product of take are reference each other, and should not be regarded as have restrictive.
As shown in FIG. 1 to 3, a kind of patellar prosthesis structure that the embodiment of the present invention provides, comprises for remaining with human body the main part 2 that patella 1 matches, the complete patella of human body is removed needs cut-out to be human body residue patella 1.The profile of the profile of main part 2 and the complete patella of human body matches, in concrete application, can be based on patient's patella CT(Computed Tomography, computed tomography) data reconstruction needs the patella threedimensional model of cut-out, main part 2 is had and the patient's patellectomy part profile of all completely so that main part 2 can with patient's facies patellaris femoris matched well.Main part 2 has the binding face 201 being affixed with human body residue patella 1, and binding face 201 can be plane.On binding face 201, be fixedly installed the fixed leg 21 being useful in the position, hole 11 of inserting human body residue patella 1, main part 2 and fixed leg 21 all have the loose structure for growing into for patient's osseous tissue, loose structure has a plurality of holes that are interconnected, hole can be arranged on binding face 201 and the surface of fixed leg 21, certainly, fixed leg 21 can adopt porous material to make with main part 2.Hole is rule or irregular staggered in length and breadth, and hole can be extended down to the inside of fixed leg 21 and main part 2, rather than is only distributed in surface.Fixed leg 21 inserts residue patellas, can allow osseous tissue its inside of growing into, and increases the adhesion of itself and surrounding bone tissue, forms good fixed effect biology.Like this, after implanting patellar prosthesis structure provided by the invention, patient's the osseous tissue hole inside of can growing into, by allowing osseous tissue the grow into inside of main part 2 and the inside of fixed leg 21, can effectively increase the adhesion of main part 2 and osseous tissue, form good fixed effect biology, avoid patellar prosthesis structure to depart from, rupture, solved the problem that in prior art, patellar prosthesis anatomic form and natural Patellar joint anatomic form do not match, the mode of also growing into by bone has reached more excellent fixed effect biology, and reliability is high.
Particularly, as shown in FIG. 1 to 3, the one-body molded main part 2 that is connected in of fixed leg 21, it is in conjunction with firm, and structural reliability is high.
Particularly, as shown in FIG. 1 to 3, fixed leg 21 is cylindric, and it is easy to machine-shaping.Fixed leg 21 can be provided with two or more, on human body residue patella 1, is provided with the cylindrical hole mating with fixed leg 21.Certainly, understandably, fixed leg 21 also can be the suitable shapes such as polygon or polymorphic structure, and its quantity also can be determined according to practical situation.
In the present embodiment, as shown in FIG. 1 to 3, fixed leg 21 is provided with three, is triangular shape and arranges between three fixed legs 21.
Particularly, main part 2 and fixed leg 21 can pass through the molding of metal melting rapid shaping technique.
Or main part 2 and fixed leg 21 also can pass through powder metallurgical technique molding, have even hole after its molding.
In concrete application, main part 2 and fixed leg 21 can adopt the alloys such as titanium alloy or tantalum alloy by powder metallurgical technique molding.Metal dust adopts medical titanium alloy or tantalum alloy, makes mechanical property and patient self the patella biomechanical property of porous bodies portion 2 similar.
Particularly, the outer surface of main part 2 is smooth surface layer, and it act as with condyle of femur and forms smooth sliding surface.The thickness of smooth surface layer can be 2 millimeters.
Particularly, as shown in Figure 1 to 4, the aperture of the hole on loose structure is 0.2 to 0.35 millimeter, is beneficial to osteocyte and grows into better in hole, further improves the adhesion between main part 2 and human body residue patella 1 osseous tissue.Certainly, the aperture of the hole on loose structure also can be set to other suitable numerical value.Loose structure can comprise the hole 200 of mutual perforation, and each hole 200 can longitudinal arrangement, transversely arranged or arranged askew etc., its arrangement mode can rule also can be irregular, suitable shape can be roundedly waited in the cross section of each hole 200.Hole on loose structure is not limited to the queueing discipline shown in Fig. 4 and shape.
Particularly, the porosity of the hole on loose structure is 40% to 60%.Porosity refers to that the hole of material internal accounts for the ratio of cumulative volume.It has improved the adhesion between main part 2 and human body residue patella 1 osseous tissue under the prerequisite that guarantees structural strength.The mechanical property of patellar prosthesis can be close with the mechanical property of spongy bone.
Patellar prosthesis structure provided by the invention, can adopt medical image reconstruction software to rebuild patella model, rebuild the threedimensional model of patellectomy part, profile as the main part 2 of patellar prosthesis, it has the main part 2 and fixed leg 21 of loose structure by setting, adopt the medical software of the generation loose structure of CAD software or special use, design has the patellar prosthesis of loose structure, can determine porosity according to patient's patella bone density, require loose structure is interconnected through hole simultaneously, and pore size is suitable for osteocyte and grows into and grow.Can the grow into inside of loose structure mesopore of patient's osseous tissue, by allowing osseous tissue the grow into inside of main part 2 and the inside of fixed leg 21, can effectively increase the adhesion of main part 2 and osseous tissue, form good fixed effect biology, avoid patellar prosthesis structure to depart from, rupture, solved the problem that in prior art, patellar prosthesis anatomic form and natural Patellar joint anatomic form do not match, the mode of also growing into by bone reached more excellent fixed effect biology, and reliability is high.Solved patellar prosthesis anatomic form poor with the not consistent anatomy causing of cadaver patella in Chinese anatomic form and mechanics transmission matching, and the poor technical problem that causes prosthetic loosening of the fixed effect of existing patellar prosthesis and remaining bone.
These are only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace or improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a patellar prosthesis structure, comprise the main part matching for the human body residue patella after deep with patella, it is characterized in that, described main part has the binding face being affixed with described human body residue patella, on described binding face, be fixedly installed the fixed leg that is useful on the Kong Weizhong that inserts described human body residue patella, described main part and described fixed leg all have loose structure, and described loose structure has a plurality of holes that are interconnected.
2. patellar prosthesis structure as claimed in claim 1, is characterized in that, described fixed leg is shaped in described main part.
3. patellar prosthesis structure as claimed in claim 1, is characterized in that, described fixed leg is cylindric, and it is provided with two or more, on described human body residue patella, is provided with the cylindrical hole mating with described fixed leg.
4. patellar prosthesis structure as claimed in claim 1, is characterized in that, described fixed leg is provided with three, is triangular shape and arranges between three described fixed legs.
5. patellar prosthesis structure as claimed in claim 1, is characterized in that, described main part and described fixed leg are by the molding of metal melting rapid shaping technique.
6. patellar prosthesis structure as claimed in claim 1, is characterized in that, described main part and described fixed leg are by powder metallurgical technique molding.
7. patellar prosthesis structure as claimed in claim 6, is characterized in that, described main part and described fixed leg adopt titanium alloy or tantalum alloy by powder metallurgical technique molding.
8. patellar prosthesis structure as claimed in claim 1, is characterized in that, the outer surface of described main part is smooth surface layer.
9. patellar prosthesis structure as claimed in claim 1, is characterized in that, the aperture of the hole on described loose structure is 0.2 to 0.35 millimeter.
10. patellar prosthesis structure as claimed in claim 1, is characterized in that, the porosity of the hole of described loose structure is 40% to 60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310554234.6A CN103598935A (en) | 2013-11-08 | 2013-11-08 | Patella prosthesis structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310554234.6A CN103598935A (en) | 2013-11-08 | 2013-11-08 | Patella prosthesis structure |
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| CN103598935A true CN103598935A (en) | 2014-02-26 |
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| CN201310554234.6A Pending CN103598935A (en) | 2013-11-08 | 2013-11-08 | Patella prosthesis structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104799979A (en) * | 2015-05-11 | 2015-07-29 | 北京爱康宜诚医疗器材股份有限公司 | Patellar prosthesis |
| WO2016206500A1 (en) * | 2015-06-26 | 2016-12-29 | 北京市春立正达医疗机械股份有限公司 | 3d printed custom module capable of treating osteonecrosis of hip and manufacturing method thereof |
| CN107280816A (en) * | 2016-03-31 | 2017-10-24 | 重庆润泽医药有限公司 | A kind of kneecap implant |
| CN111588520A (en) * | 2020-05-08 | 2020-08-28 | 天衍医疗器材有限公司 | Knee joint prosthesis |
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| WO1992018069A1 (en) * | 1991-04-23 | 1992-10-29 | Mikhail Michael W E | Metal-backed patellar prosthesis |
| US5609640A (en) * | 1991-07-05 | 1997-03-11 | Johnson; David P. | Patella prostheses |
| US6146423A (en) * | 1999-01-28 | 2000-11-14 | Implex Corporation | Patella replacement apparatus |
| US20030088315A1 (en) * | 2001-11-08 | 2003-05-08 | Supinski Robert S | Patella replacement apparatus |
| CN101842062A (en) * | 2007-09-25 | 2010-09-22 | 拜欧米特制造公司 | Cementless tibial tray |
| CN102599993A (en) * | 2010-12-30 | 2012-07-25 | 德普伊产品公司 | Knee prosthesis having commonly-sized patella components with varying thicknesses and peak surface diameters |
| CN102727327A (en) * | 2012-05-24 | 2012-10-17 | 上海交通大学医学院附属第九人民医院 | Artificial knee joint prosthesis |
| CN202589708U (en) * | 2012-05-24 | 2012-12-12 | 上海交通大学医学院附属第九人民医院 | Artificial knee joint prosthesis of improved patellofemoral joint design |
| CN203263590U (en) * | 2013-03-26 | 2013-11-06 | 深圳先进技术研究院 | Patella tissue engineering scaffold |
| CN203576699U (en) * | 2013-11-08 | 2014-05-07 | 深圳先进技术研究院 | Patella prosthesis structure |
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2013
- 2013-11-08 CN CN201310554234.6A patent/CN103598935A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992018069A1 (en) * | 1991-04-23 | 1992-10-29 | Mikhail Michael W E | Metal-backed patellar prosthesis |
| US5609640A (en) * | 1991-07-05 | 1997-03-11 | Johnson; David P. | Patella prostheses |
| US6146423A (en) * | 1999-01-28 | 2000-11-14 | Implex Corporation | Patella replacement apparatus |
| US20030088315A1 (en) * | 2001-11-08 | 2003-05-08 | Supinski Robert S | Patella replacement apparatus |
| CN101842062A (en) * | 2007-09-25 | 2010-09-22 | 拜欧米特制造公司 | Cementless tibial tray |
| CN102599993A (en) * | 2010-12-30 | 2012-07-25 | 德普伊产品公司 | Knee prosthesis having commonly-sized patella components with varying thicknesses and peak surface diameters |
| CN102727327A (en) * | 2012-05-24 | 2012-10-17 | 上海交通大学医学院附属第九人民医院 | Artificial knee joint prosthesis |
| CN202589708U (en) * | 2012-05-24 | 2012-12-12 | 上海交通大学医学院附属第九人民医院 | Artificial knee joint prosthesis of improved patellofemoral joint design |
| CN203263590U (en) * | 2013-03-26 | 2013-11-06 | 深圳先进技术研究院 | Patella tissue engineering scaffold |
| CN203576699U (en) * | 2013-11-08 | 2014-05-07 | 深圳先进技术研究院 | Patella prosthesis structure |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104799979A (en) * | 2015-05-11 | 2015-07-29 | 北京爱康宜诚医疗器材股份有限公司 | Patellar prosthesis |
| CN104799979B (en) * | 2015-05-11 | 2017-01-25 | 北京爱康宜诚医疗器材股份有限公司 | Patellar prosthesis |
| WO2016206500A1 (en) * | 2015-06-26 | 2016-12-29 | 北京市春立正达医疗机械股份有限公司 | 3d printed custom module capable of treating osteonecrosis of hip and manufacturing method thereof |
| CN107280816A (en) * | 2016-03-31 | 2017-10-24 | 重庆润泽医药有限公司 | A kind of kneecap implant |
| CN107280816B (en) * | 2016-03-31 | 2020-10-13 | 重庆润泽医药有限公司 | Patellar implant |
| CN111588520A (en) * | 2020-05-08 | 2020-08-28 | 天衍医疗器材有限公司 | Knee joint prosthesis |
| CN111588520B (en) * | 2020-05-08 | 2021-08-03 | 天衍医疗器材有限公司 | Knee joint prosthesis |
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