CN105816259A - Flexible knee joint prosthesis - Google Patents
Flexible knee joint prosthesis Download PDFInfo
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- CN105816259A CN105816259A CN201610336178.2A CN201610336178A CN105816259A CN 105816259 A CN105816259 A CN 105816259A CN 201610336178 A CN201610336178 A CN 201610336178A CN 105816259 A CN105816259 A CN 105816259A
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- femoral condyle
- joint prosthesis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
- A61F2/3836—Special connection between upper and lower leg, e.g. constrained
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
- A61F2/3859—Femoral components
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
- A61F2/3877—Patellae or trochleae
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
- A61F2/389—Tibial components
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/3006—Properties of materials and coating materials
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30448—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using adhesives
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30451—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements soldered or brazed or welded
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Physical Education & Sports Medicine (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
本发明公开了一种柔性膝关节假体，包括股骨髁假体和胫骨平台，所述股骨髁假体和胫骨平台之间设置有柔性垫片，柔性垫片固定在胫骨平台上，柔性垫片支撑股骨髁假体，随着股骨髁假体的旋转，所述柔性垫片产生适应性变形，保持与股骨髁假体的接触部位为面接触。由于柔性垫片采用超高分子量聚乙烯制成，在压力作用下关节面会产生变形以适应并贴合股骨髁假体屈曲旋转后的形变，由此显著减轻了对胫骨平台的磨损。
The invention discloses a flexible knee joint prosthesis, comprising a femoral condyle prosthesis and a tibial platform, a flexible gasket is arranged between the femoral condyle prosthesis and the tibial platform, the flexible gasket is fixed on the tibial platform, and the flexible gasket The femoral condyle prosthesis is supported, and with the rotation of the femoral condyle prosthesis, the flexible spacer produces adaptive deformation to keep the contact part with the femoral condyle prosthesis in surface contact. Because the flexible spacer is made of ultra-high molecular weight polyethylene, the articular surface will deform under pressure to adapt to and fit the deformation of the femoral condyle prosthesis after flexion and rotation, thereby significantly reducing the wear on the tibial plateau.
Description
技术领域 technical field
本发明涉及一种柔性膝关节假体，具体涉及应用在人体膝关节部位股骨髁假体与胫骨平台之间的柔性垫片。 The invention relates to a flexible knee joint prosthesis, in particular to a flexible spacer applied between the femoral condyle prosthesis and the tibial plateau at the human knee joint.
背景技术 Background technique
人工膝关节置换手术中所使用的膝关节假体，在股骨一侧通常采用医用金属制作股骨髁假体，例如不锈钢或钴合金，胫骨侧则采用超高分子量聚乙烯制作垫片（胫骨平台）；出于膝关节运动学的需要股骨髁假体金属关节面一般会被设计成复杂的连续空间曲面，但是胫骨侧的超高分子量聚乙烯关节面垫片则只能设计成按照某一特定位置（例如直立位）时与股骨侧关节面有较高吻合度的曲面，以保证直立时的稳定。 The knee joint prosthesis used in artificial knee replacement surgery usually uses medical metal to make the femoral condyle prosthesis on the femoral side, such as stainless steel or cobalt alloy, and the tibial side uses ultra-high molecular weight polyethylene to make spacers (tibial plateau) ; Due to the needs of knee joint kinematics, the metal articular surface of the femoral condyle prosthesis is generally designed as a complex continuous space surface, but the UHMWPE articular spacer on the tibial side can only be designed according to a specific position. (For example, in the upright position), there is a curved surface with a high degree of coincidence with the articular surface of the femoral side to ensure the stability when standing upright.
但是当膝关节开始屈曲运动时，上下两个表面的接触面积会急剧减少甚至在某些位置理论上只剩一条接触线了，这时局部压强会非常高，这也是导致关节面磨损加快的一个重要原因。 But when the knee joint starts to flex, the contact area between the upper and lower surfaces will decrease sharply, and even theoretically there is only one contact line left in some positions. At this time, the local pressure will be very high, which is also a factor that leads to accelerated wear of the articular surface. important reason.
发明内容 Contents of the invention
针对现有技术中存在的问题，本发明的目的在于提供一种柔性膝关节假体，在股骨髁假体与胫骨平台之间设置柔性垫片，柔性垫片采用超高分子量聚乙烯制成，在压力作用下关节面会产生变形以适应并贴合股骨髁假体屈曲旋转后的形变，由此显著减轻了对胫骨平台的磨损。 In view of the problems existing in the prior art, the object of the present invention is to provide a flexible knee joint prosthesis, a flexible spacer is set between the femoral condyle prosthesis and the tibial plateau, the flexible spacer is made of ultra-high molecular weight polyethylene, Under the action of pressure, the articular surface will deform to adapt to and conform to the deformation of the femoral condyle prosthesis after flexion and rotation, thereby significantly reducing the wear on the tibial plateau.
为了实现上述目的，本发明采用以下技术方案： In order to achieve the above object, the present invention adopts the following technical solutions:
柔性膝关节假体，包括股骨髁假体和胫骨平台，所述股骨髁假体和胫骨平台之间设置有柔性垫片，柔性垫片固定在胫骨平台上，柔性垫片支撑股骨髁假体，随着股骨髁假体的旋转，所述柔性垫片产生适应性变形，保持与股骨髁假体的接触部位为面接触。 The flexible knee joint prosthesis includes a femoral condyle prosthesis and a tibial platform, a flexible spacer is arranged between the femoral condyle prosthesis and the tibial platform, the flexible spacer is fixed on the tibial platform, and the flexible spacer supports the femoral condyle prosthesis, With the rotation of the femoral condyle prosthesis, the flexible spacer produces adaptive deformation and keeps the contact part with the femoral condyle prosthesis in surface contact.
进一步，所述柔性垫片为中空体，内腔充满填充液。 Further, the flexible gasket is a hollow body, and the inner cavity is filled with filling liquid.
进一步，所述柔性垫片采用超高分子量聚乙烯制成，所述填充液采用生理盐水或纯化水。 Further, the flexible gasket is made of ultra-high molecular weight polyethylene, and the filling fluid is physiological saline or purified water.
进一步，所述柔性垫片中设置有纤维加强层。 Further, a fiber reinforcement layer is arranged in the flexible gasket.
进一步，所述柔性垫片包括壳体和封盖，封盖上设置有注入孔和排气孔，向内腔注入填充液之后密封所述注入孔和排气孔。 Further, the flexible gasket includes a shell and a cover, and the cover is provided with an injection hole and a vent hole, and the injection hole and the vent hole are sealed after the filling liquid is injected into the inner cavity.
进一步，将所述封盖和壳体采用粘接剂对合粘接，或者使用超声波焊接将两部分对接形成密闭的内部空腔。 Further, the cover and the shell are butt-bonded with an adhesive, or ultrasonic welding is used to butt the two parts to form a closed inner cavity.
进一步，所述胫骨平台上设置有固定槽，所述柔性垫片设置在所述固定槽中。 Further, the tibial plateau is provided with a fixing groove, and the flexible spacer is arranged in the fixing groove.
进一步，所述柔性垫片带有裙边，裙边上设置连接孔，通过螺钉固定在胫骨平台上。 Further, the flexible spacer has a skirt, and the skirt is provided with connecting holes, and is fixed on the tibial plateau by screws.
采用上述结构设置的柔性膝关节假体具有以下优点： The flexible knee prosthesis with the above structure has the following advantages:
随着股骨髁假体的旋转，柔性垫片会产生适应性变形，保持与股骨髁假体的接触部位为面接触，由此显著减轻了对胫骨平台的磨损，对柔性垫片自身的磨损非常轻微。 With the rotation of the femoral condyle prosthesis, the flexible spacer will produce adaptive deformation and keep the contact part with the femoral condyle prosthesis in surface contact, thereby significantly reducing the wear on the tibial plateau, and the wear of the flexible spacer itself is very important. slight.
本发明延长了膝关节假体的使用寿命，可以减少患者后期手术次数，减轻患者的痛苦，并为患者节省治疗费用。 The invention prolongs the service life of the knee joint prosthesis, can reduce the number of postoperative operations of the patient, alleviate the pain of the patient, and save the treatment cost for the patient.
虽然柔性垫片是中空的，由于液体的不可压缩特性，所以超高分子量聚乙烯关节面垫片的可变形上表面仍可从中空腔内液体获得足够的支撑力。 Although the flexible spacer is hollow, due to the incompressibility of the liquid, the deformable upper surface of the UHMWPE articular spacer can still obtain sufficient supporting force from the liquid in the hollow cavity.
由于采用了柔性垫片，在假体中具有缓冲作用，能够减轻膝关节假体与人体的生理差异，提高对假体的适应性。 Due to the use of flexible gaskets, the prosthesis has a buffering effect, which can reduce the physiological difference between the knee joint prosthesis and the human body, and improve the adaptability to the prosthesis.
附图说明 Description of drawings
图1为本发明实施例1的分解图； Fig. 1 is the exploded view of embodiment 1 of the present invention;
图2为本发明实施例1的分解图； Fig. 2 is the exploded view of embodiment 1 of the present invention;
图3为本发明实施例2的分解图； Fig. 3 is the exploded view of embodiment 2 of the present invention;
图4为本发明实施例2的分解图； Fig. 4 is the exploded view of embodiment 2 of the present invention;
图5为本发明所采用柔性垫片的制造工艺示意图； 5 is a schematic diagram of the manufacturing process of the flexible gasket used in the present invention;
图6为本发明所采用柔性垫片的制造工艺示意图； 6 is a schematic diagram of the manufacturing process of the flexible gasket used in the present invention;
图7为本发明所采用柔性垫片的制造工艺示意图； 7 is a schematic diagram of the manufacturing process of the flexible gasket used in the present invention;
图8为本发明实施例3的分解图； Figure 8 is an exploded view of Embodiment 3 of the present invention;
图9为本发明实施例1的分解图。 Fig. 9 is an exploded view of Embodiment 1 of the present invention.
图中：1.股骨髁假体；2.柔性垫片；2-1.纤维加强层；2-2.封盖；2-3.注入孔；2-4.排气孔；2-5.裙边；2-6.固定槽；3.胫骨平台；3-1.固定槽；4.填充液；5.螺钉。 In the figure: 1. Femoral condyle prosthesis; 2. Flexible gasket; 2-1. Fiber reinforcement layer; 2-2. Cover; 2-3. Injection hole; 2-4. Vent hole; 2-5. Skirt; 2-6. Fixing groove; 3. Tibial plateau; 3-1. Fixing groove; 4. Filling fluid; 5. Screw.
具体实施方式 detailed description
为更进一步阐述本发明为达到预定技术目的所采取的技术手段及功效，以下结合附图和较佳实施例，对本发明的结构、特征以及功效详细说明如下。 In order to further illustrate the technical means and functions adopted by the present invention to achieve the intended technical purpose, the structure, features and functions of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.
实施例1Example 1
如图1、图2所示为本发明的一个实施例，该实施例中的柔性膝关节假体，包括股骨髁假体1和胫骨平台3，股骨髁假体1和胫骨平台3之间设置有柔性垫片2，柔性垫片2固定在胫骨平台3上，柔性垫片2支撑股骨髁假体1，随着股骨髁假体1的旋转，柔性垫片2产生适应性变形，保持与股骨髁假体1的接触部位为面接触。 As shown in Fig. 1, Fig. 2 is an embodiment of the present invention, the flexible knee joint prosthesis in this embodiment, comprises femoral condyle prosthesis 1 and tibial platform 3, is arranged between femoral condyle prosthesis 1 and tibial platform 3 There is a flexible spacer 2, which is fixed on the tibial plateau 3, and the flexible spacer 2 supports the femoral condyle prosthesis 1. With the rotation of the femoral condyle prosthesis 1, the flexible spacer 2 produces adaptive deformation and keeps in line with the femoral condyle. The contact part of the condyle prosthesis 1 is surface contact.
柔性垫片2为中空体，内腔充满填充液4。 The flexible gasket 2 is a hollow body, and the inner cavity is filled with a filling liquid 4 .
柔性垫片2采用超高分子量聚乙烯制成，填充液4采用生理盐水或纯化水，这样即便发生泄漏也不会对人体健康造成损害。 The flexible gasket 2 is made of ultra-high molecular weight polyethylene, and the filling liquid 4 is made of physiological saline or purified water, so that even if leakage occurs, it will not cause damage to human health.
柔性垫片2包括壳体和封盖2-2，封盖2-2上设置有注入孔2-3和排气孔2-4，向内腔注入填充液之后用封堵剂密封注入孔2-3和排气孔2-4。 The flexible gasket 2 includes a shell and a cover 2-2. The cover 2-2 is provided with an injection hole 2-3 and an exhaust hole 2-4. After the filling liquid is injected into the inner cavity, the injection hole 2 is sealed with a blocking agent. -3 and vent holes 2-4.
将封盖2-2和壳体采用粘接剂对合粘接，或者使用超声波焊接将两部分对接形成密闭的内部空腔。 The cover 2-2 and the shell are butt-bonded with an adhesive, or ultrasonic welding is used to butt the two parts to form a closed inner cavity.
为了固定柔性垫片2，胫骨平台3上设置有固定槽3-1，如图9所示，柔性垫片2设置在该固定槽中，相应地，柔性垫片2上也设置固定槽2-6，作为优化设计，固定槽2-6和固定槽3-1可以卡接，这样柔性垫片2在胫骨平台3上安装更牢固。 In order to fix the flexible gasket 2, the tibial plateau 3 is provided with a fixing groove 3-1, as shown in Figure 9, the flexible gasket 2 is arranged in the fixing groove, and correspondingly, the flexible gasket 2 is also provided with a fixing groove 2-1. 6. As an optimized design, the fixing groove 2-6 and the fixing groove 3-1 can be snapped together, so that the flexible spacer 2 can be installed more firmly on the tibial plateau 3 .
实施例2Example 2
如图3、图4所示为本发明实施例2，在本实施例中，柔性垫片2中设置有纤维加强层2-1。通过设置纤维加强层2-1，提高了柔性垫片2的强度，有效防止腔体被挤压破裂。 Figure 3 and Figure 4 show Embodiment 2 of the present invention. In this embodiment, the flexible gasket 2 is provided with a fiber reinforced layer 2-1. By providing the fiber reinforced layer 2-1, the strength of the flexible gasket 2 is improved, and the cavity is effectively prevented from being crushed and broken.
如图5所示为柔性垫片2的制作过程，具体通过模压方法分别制作，超高分子量聚乙烯关节面垫片制作成封盖和中空形式壳体，在封盖上预留两个小孔以备注入液体和排出残存气体。将封盖和壳体采用粘接剂对合粘接或者使用超声波焊接等方法将两部分牢固对接已形成密闭的内部空腔，用注射器将生理盐水或纯化水等液体从一个小孔注入，内腔残存气体会从另一小孔排出；液体注满后用封堵剂将两个小孔封住。 As shown in Figure 5, the manufacturing process of the flexible gasket 2 is specifically manufactured by molding. The ultra-high molecular weight polyethylene joint surface gasket is made into a cover and a hollow shell, and two small holes are reserved on the cover. In order to inject liquid and discharge residual gas. The cover and the shell are bonded together with an adhesive or the two parts are firmly connected by ultrasonic welding to form a closed internal cavity, and a syringe is used to inject liquid such as physiological saline or purified water through a small hole, and the inner cavity The remaining gas in the cavity will be discharged from the other small hole; after the liquid is filled, the two small holes will be sealed with a plugging agent.
实施例3Example 3
如图8所示为本发明实施例3，在本实施例中，柔性垫片2带有裙边2-5，裙边2-5上设置连接孔，然后通过螺钉5将柔性垫片2固定在胫骨平台3上，相应地，胫骨平台3上可以设置螺纹孔。 As shown in Figure 8, it is Embodiment 3 of the present invention. In this embodiment, the flexible gasket 2 has a skirt 2-5, and connecting holes are set on the skirt 2-5, and then the flexible gasket 2 is fixed by screws 5. Correspondingly, threaded holes can be set on the tibial plateau 3 .
上面所述只是为了说明本发明，应该理解为本发明并不局限于以上实施例，符合本发明思想的各种变通形式均在本发明的保护范围之内。 The above is just to illustrate the present invention, and it should be understood that the present invention is not limited to the above embodiments, and various modifications conforming to the idea of the present invention are within the protection scope of the present invention.
Claims (8)
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| CN201610336178.2A CN105816259A (en) | 2016-05-20 | 2016-05-20 | Flexible knee joint prosthesis |
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Application publication date: 20160803 |