CN101697931B - Liner part knee-joint prosthesis, tibia part and knee-joint prosthesis - Google Patents
Liner part knee-joint prosthesis, tibia part and knee-joint prosthesis Download PDFInfo
- Publication number
- CN101697931B CN101697931B CN 200910180678 CN200910180678A CN101697931B CN 101697931 B CN101697931 B CN 101697931B CN 200910180678 CN200910180678 CN 200910180678 CN 200910180678 A CN200910180678 A CN 200910180678A CN 101697931 B CN101697931 B CN 101697931B
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- component
- knee
- joint prosthesis
- liner
- liner component
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- 210000000629 knee joint Anatomy 0.000 title claims abstract description 49
- 210000002303 tibia Anatomy 0.000 title claims abstract description 9
- 238000010276 construction Methods 0.000 claims description 9
- 238000005452 bending Methods 0.000 claims description 6
- -1 polyethylene Polymers 0.000 description 10
- 230000035882 stress Effects 0.000 description 9
- 229920000573 polyethylene Polymers 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000007943 implant Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000035479 physiological effects, processes and functions Effects 0.000 description 3
- 230000002980 postoperative effect Effects 0.000 description 3
- 210000000689 upper leg Anatomy 0.000 description 3
- 210000001188 articular cartilage Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005021 gait Effects 0.000 description 2
- 210000003127 knee Anatomy 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 206010058046 Post procedural complication Diseases 0.000 description 1
- 208000035965 Postoperative Complications Diseases 0.000 description 1
- 210000003484 anatomy Anatomy 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 210000000845 cartilage Anatomy 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 210000004285 patellofemoral joint Anatomy 0.000 description 1
- 230000001766 physiological effect Effects 0.000 description 1
- 230000009894 physiological stress Effects 0.000 description 1
- 108010048734 sclerotin Proteins 0.000 description 1
Images
Classifications
-
- 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
-
- 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
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- 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
The invention provides a new liner part of knee-joint prosthesis to solve the reduced service life of knee-joint prosthesis due to inappropriate position of rotation axis of existing liner part of knee-joint prosthesis in the prior art. When the knee-joint prosthesis performs physiological bend, the liner part rotates on the tibia part platform of the knee-joint prosthesis, the projection of the liner part on the plane of the tibia part platform is circumscribed by a smallest rectangle, two straight lines as the perpendicular bisectors on the long side and short side of the smallest rectangle divide the smallest rectangle into four zones, the projection of the rotation axis around which the liner part rotates on the plane is located in one of the four zones at the inner side of the back position of the knee-joint. The invention is applicable knee-joint prosthesis with a movable platform.
Description
Technical field
The present invention relates to the prosthese that a kind of traverser knee-joint prosthesis, particularly implant into body substitute original knee.
Background technology
Modern complete knee joint surface replacement operation (TKA) has become the kneed effective means of the sick damage of replacement human body of extensive use, its method is to utilize disrupted bone and cartilage in metal and the polythene material displacement knee joint, as substitute the sclerotin of distal femur and proximal tibia with metallic femoral component and tibial component, substitute articular cartilage and meniscus by polyethylene liner.
Early stage knee-joint prosthesis is fixed platform knee-joint prosthesis (FBK), the femoral component and the polyethylene liner between the tibial component that are knee-joint prosthesis are to be fixed on the following tibial component, and the medial condyle of femoral component and lateral condyle are set directly in the corresponding depression of polyethylene liner.Knee joint after the displacement is when flexing, because special anatomical structure around it can make femoral component to rotate on polyethylene liner.If FBK, because polyethylene liner is fixed on the tibial component, for reaching the purpose of rotary moveable, need be by the shape of reducing contact surface between femoral component and the polyethylene part right reaching the purpose of knee joint rotation, but this can make femoral component and polyethylene part contact area reduce simultaneously and produce high contact stress.In order to address this problem, to develop and to be called as traverser knee-joint prosthesis (MBK).The traverser knee-joint prosthesis is meant and is provided with rotatable liner component between femoral component and tibial component, between liner component and the tibial component is right the contacting of high shape, liner component can rotate on the corresponding platform of tibial component, under the normal condition, twisting resistance in the walking and shearing force are disperseed stress by human articular cartilage creep or relative displacement, and this is that normal human's physiological stress disperses usefulness.MBK has brought into play this usefulness, and the stress that the joint was subjected to when prosthese bore a heavy burden obtains suitable dispersion by the rotation of liner component, can make the loosening minimizing of tibial component.Can make simultaneously right the increasing of shape of contact surface between femoral component and the polyethylene part, increase the contact area of the two, solve the contradiction between the right and high contact stress of shape.Compare with the fixed platform knee-joint prosthesis, MBK prosthese advantage in design is a lot: reduce the suffered bad stress of tibial prosthesis; Polyethylene wear reduces; Reduce the bad rotation line of force; Balanced polyethylene liner parts bear load, make patellofemoral joint " close friend " more; Reduce the difficulty of operation.The minimizing very effectively of these characteristics post-operative complication.
But, the position of the rotation axis that present traverser knee-joint prosthesis liner component rotates on the tibial component platform is in the geometric center of liner component, be that rotation axis is perpendicular to plane, tibial component platform place and by the geometric center of liner component in this plane projection, (in fact knee joint relative motion between femur and the tibia when bending and stretching activity causes described rotatablely moving and this physiological activity with human body reality does not conform to, the position of the rotation axis of described rotation should be to depart from described geometric center), the rotation of this non-physiologic can increase the friction between liner component and the tibial component, reduces the service life of prosthese.Simultaneously, this also causes the gait not normal (mainly be in the starting stage of knee sprung can not keep normal kneed Scrow-Home motion) of patient at the TKA postoperative.
Summary of the invention
In order to solve the not normal and knee-joint prosthesis low problem in service life of the improper patient's postoperative gait that causes of liner component rotation axis measurement in the prior art, the invention provides a kind of liner component of new knee-joint prosthesis, the adjustment of Human Physiology reality has been carried out more meeting in the position of the described rotation axis of liner component, reduced the friction between liner component and the tibial component.
Technical scheme of the present invention is as follows:
The knee-joint prosthesis liner component, when knee-joint prosthesis carries out physiological bending, described liner component rotates on the tibial component platform of knee-joint prosthesis, liner component is external by a minimum rectangle in the planar projection in tibial component platform place, vertically divide the long limit of minimum rectangle and two straight lines of minor face equally described minimum rectangle is divided into 4 zones, liner component carries out 1 zone of rotation axis inboard after this planar projection is arranged in described 4 zones to be positioned at knee joint of described rotation.
Under liner component and femoral component confined state, the femoral component contact surface of liner component and knee-joint prosthesis is provided with the groove that holds the femoral component medial condyle, and described liner component rotation axis is positioned at described groove in this planar projection in the planar projection in tibial component platform place.
Described groove minimum point overlaps in this planar projection with described liner component rotation axis in the planar projection in tibial component platform place.
With the tibial component that above-mentioned liner component matches, comprise the load-carrying construction that is fixed in the tibia, the described rotation axis of liner component is positioned at described load-carrying construction in this planar projection in the planar projection in tibial component platform place.
Technique effect of the present invention is:
The present invention is provided with the rotation axis of liner component to such an extent that rely on medial region after the knee joint, make the lateral condyle of femoral component partly rotate around this axis, this just makes the position of rotation axis of liner component be consistent with physiology is actual, avoided because the improper additional stress that causes of rotation axis measurement, can recover kneed Scrow-Home motion to a great extent, make the knee joint of patient's postoperative can recover normal physiological movement; Simultaneously, technical scheme of the present invention has reduced the friction between liner component and the tibial component, has improved the service life of knee-joint prosthesis.
Description of drawings
Fig. 1 is the view of liner component of the present invention and tibial component platform opposite face, and the top is human body the place ahead among the figure, i.e. people's eyes institute apparent direction under natural erectility, and the right side is the interior side direction of knee joint among the figure.
Fig. 2 is the view of tibial component of the present invention platform (the be tibial component platform) face relative with liner component, and the top is human body the place ahead among the figure, and the right side is kneed lateral direction among the figure.
Fig. 3 is after liner component of the present invention and tibial component are assembled together, liner component outward turning state diagram, and the top is human body the place ahead among the figure, the right side is kneed lateral direction among the figure.
Fig. 4 is after liner component of the present invention and tibial component are assembled together, the state diagram of liner component inward turning, and the top is human body the place ahead among the figure, the right side is kneed lateral direction among the figure.
Fig. 5 implants the structural representation of tibia one side for tibial component of the present invention.
Sign is described as follows among the figure:
1-4, dovetail groove type swing-around trajectory.
The specific embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is elaborated.
Shown in Figure 1 is liner component lower surface of the present invention, is the face with the assembling of tibial component platform.When human body knee joint carries out normal physiological bending, liner component of the present invention can rotate on the tibial component platform, this mainly is owing to the lateral condyle that femur can take place in knee joint physiological bending process produces around the motion that medial condyle rotates, this make above-mentioned rotation takes place liner component rotation axis in the planar projection in tibial component platform place not in the geometric center of liner component in this plane projection.The rotation axis that above-mentioned rotation takes place liner component of the present invention departs from the geometric center of liner component, after the deflection knee joint in the side direction setting.Concrete is exactly in the external minimum rectangle of tibial component platform place plane projection with correspondence liner component shown in Figure 1, promptly this rectangle surrounds the described projection of liner component, and equal a bit tangent with the described projection outline of liner component at least in orthogonal each limit.Then this rectangle is divided into 4 zones, promptly two straight lines of vertically dividing orthogonal long limit and minor face respectively equally are divided into 4 zones with above-mentioned rectangle, two dotted lines are exactly these two straight lines among Fig. 1, wherein above-mentioned liner component rotation axis is 1 inboard zone after this planar projection should be arranged in the contiguous knee joint in these 4 zones, and the stain shown in Fig. 1 promptly is the liner component rotation axis projection selectable location that meets inventive concept.This set shows and meets Human Physiology reality through checking, can realize purpose of the present invention.Preferred scheme is to make more close above-mentioned two the collinear intersection points of liner component rotation axis projection.
There are a lot of prior aries position how to adjust the described rotation axis of liner component, has for example determined the position of rotation axis among Fig. 1 by the swing-around trajectory that cooperates on liner component and the tibial plateau.Among Fig. 1 sign 1 and sign 2 pointed be two sections arcual dovetail groove type swing-around trajectories, be with Fig. 2 in sign 3 and sign 4 two sections tracks that arcual dovetail groove type swing-around trajectory matches pointed.The dovetail groove type track is a prior art, is mainly used under the situation of sliding friction.Sign 1 and sign 2 are pointed to be that two sections arcual centers of circle overlap, and this center of circle is exactly the projection of the rotation axis of the said liner component of the present invention.Also have a lot of methods that realize determining rotation axis measurement,, no longer enumerate as between liner component and tibial component platform, rotating shaft etc. being set.
Liner component is provided with the groove (not describing this groove in order to know among Fig. 3 and Fig. 4) that holds femoral component medial condyle and lateral condyle towards the surface of femoral component, analyze as the front, the described rotation of liner component and femoral component rotatablely moving when the knee joint physiological bending is corresponding, therefore the rotation axis of liner component should pass the groove that holds medial condyle, rotation axis is positioned at this groove in this planar projection in the planar projection in tibial component platform place in other words, this makes and has reduced additional stress by the stressed more reasonable of when described rotation takes place liner component.Further preferred scheme can make the minimum point of holding the medial condyle groove overlap in this planar projection with described rotation axis in the planar projection in tibial component platform place.The minimum point of holding the medial condyle groove under human body normal upright state corresponding femoral component medial condyle near the point of liner component.
What Fig. 2 showed is the tibial component platform surface that matches with Fig. 1 liner component, and the stain shown in the figure is and the corresponding position of described liner component rotation axis.
Fig. 3 and Fig. 4 have shown the two states of liner component inward turning and outward turning.Fig. 5 has shown the structure of tibial component implant into body part.The buttress brace structure that connects between three spud piles that are triangularly arranged and the spud pile as shown in Figure 5, this structure is implanted when carrying out the TKA operation and is dug on the tibia in the suitable shrinkage pool of shape, this is the fixed tibial parts on the one hand, also play simultaneously and bear knee joint top human body parts and be applied to power on the tibial component, so be also referred to as load-carrying construction.The setting of load-carrying construction of the present invention meets following rule: the described rotation axis of liner component is positioned at described load-carrying construction in this planar projection in the planar projection in tibial component platform place.The stain that indicates among Fig. 7 has promptly pointed to the position relation between described rotation axis of liner component and the load-carrying construction.This feasible heavy burden zone is located immediately on the load-carrying construction, and more effective opposing shearing and rotation stress reduce stress alternation to the knee-joint prosthesis influence in service life.
Claims (6)
1. knee-joint prosthesis liner component, when knee-joint prosthesis carries out physiological bending, described liner component rotates on the tibial component platform of knee-joint prosthesis, it is characterized in that: liner component is external by a minimum rectangle in the planar projection in tibial component platform place, vertically divide the long limit of described minimum rectangle and two straight lines of minor face equally described minimum rectangle is divided into 4 zones, liner component carries out 1 zone of rotation axis inboard after this planar projection is arranged in described 4 zones to be positioned at knee joint of described rotation.
2. according to the described liner component of claim 1, it is characterized in that under liner component and femoral component confined state, the femoral component contact surface of liner component and knee-joint prosthesis is provided with the groove that holds the femoral component medial condyle, and described liner component rotation axis is positioned at described groove in this planar projection in the planar projection in tibial component platform place.
3. according to the described liner component of claim 2, it is characterized in that described groove minimum point overlaps in this planar projection with described liner component rotation axis in the planar projection in tibial component platform place.
4. the tibial component that matches with the described liner component of one of claim 1 to 3, it is characterized in that comprising the load-carrying construction that is fixed in the tibia, the described rotation axis of liner component is positioned at described load-carrying construction in this planar projection in the planar projection in tibial component platform place.
5. the knee-joint prosthesis that comprises the described liner component of one of claim 1 to 3.
6. the knee-joint prosthesis that comprises the described tibial component of claim 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910180678 CN101697931B (en) | 2009-09-30 | 2009-10-27 | Liner part knee-joint prosthesis, tibia part and knee-joint prosthesis |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910235640.X | 2009-09-30 | ||
| CN200910235640 | 2009-09-30 | ||
| CN 200910180678 CN101697931B (en) | 2009-09-30 | 2009-10-27 | Liner part knee-joint prosthesis, tibia part and knee-joint prosthesis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101697931A CN101697931A (en) | 2010-04-28 |
| CN101697931B true CN101697931B (en) | 2011-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910180678 Active CN101697931B (en) | 2009-09-30 | 2009-10-27 | Liner part knee-joint prosthesis, tibia part and knee-joint prosthesis |
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| Country | Link |
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| CN (1) | CN101697931B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104814815B (en) * | 2015-05-22 | 2016-10-05 | 北京爱康宜诚医疗器材股份有限公司 | Joint prosthesis |
| CN112402063A (en) * | 2019-08-23 | 2021-02-26 | 北京智塑健康科技有限公司 | Model construction method, system and device of bone structure prosthesis and readable storage medium thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5358530A (en) * | 1993-03-29 | 1994-10-25 | Zimmer, Inc. | Mobile bearing knee |
| CN1663541A (en) * | 2005-03-02 | 2005-09-07 | 王岩 | Artificial complete knee joint substitute prosthesis capable of reconstructing anterior cruciate ligament |
| CN2768715Y (en) * | 2005-01-11 | 2006-04-05 | 郑诚功 | Improved structural artificial knee joint |
| CN101431967A (en) * | 2006-03-21 | 2009-05-13 | 理查德·D·科米斯泰克 | Torque-introducing full joint replacement prosthesis |
-
2009
- 2009-10-27 CN CN 200910180678 patent/CN101697931B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5358530A (en) * | 1993-03-29 | 1994-10-25 | Zimmer, Inc. | Mobile bearing knee |
| CN2768715Y (en) * | 2005-01-11 | 2006-04-05 | 郑诚功 | Improved structural artificial knee joint |
| CN1663541A (en) * | 2005-03-02 | 2005-09-07 | 王岩 | Artificial complete knee joint substitute prosthesis capable of reconstructing anterior cruciate ligament |
| CN101431967A (en) * | 2006-03-21 | 2009-05-13 | 理查德·D·科米斯泰克 | Torque-introducing full joint replacement prosthesis |
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| Publication number | Publication date |
|---|---|
| CN101697931A (en) | 2010-04-28 |
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Owner name: BEIJING NATON TECHNOLOGY GROUP CO., LTD. Free format text: FORMER NAME: BEIJING NATON INVESTMENT GROUP CO., LTD. Owner name: BEIJING NATON INVESTMENT GROUP CO., LTD. Free format text: FORMER NAME: BEIJING NATONG INVESTMENT CO., LTD. |
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Address after: 100082 Beijing city Haidian District Deshengmen West Street No. 15 ocean scenery area 8-2-1201 room Patentee after: BEIJING NATON TECHNOLOGY GROUP Co.,Ltd. Address before: 100082 Beijing city Haidian District Deshengmen West Street No. 15 ocean scenery area 8-2-1201 room Patentee before: Beijing naton Investment Group Ltd. |
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Address after: 100082 Beijing city Haidian District Deshengmen West Street No. 15 ocean scenery area 8-2-1201 room Patentee after: Beijing naton Investment Group Ltd. Address before: 100082 Beijing city Haidian District Deshengmen West Street No. 15 ocean scenery District No. 8-2-1201 Patentee before: Beijing Natong Investment Co.,Ltd. |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Beijing Weilian De Bone Technology Co.,Ltd. Assignor: BEIJING NATON TECHNOLOGY GROUP Co.,Ltd. Contract record no.: 2012110000102 Denomination of invention: Liner part knee-joint prosthesis, tibia part and knee-joint prosthesis Granted publication date: 20110928 License type: Exclusive License Open date: 20100428 Record date: 20120606 |
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Effective date of registration: 20240313 Address after: G356, 3rd floor, building 1, yard 9, CHENGWAN street, Haidian District, Beijing 100094 Patentee after: Beijing natong Medical Technology Holding Co.,Ltd. Country or region after: China 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. Country or region before: China |