CN101653387A - Force-closed knee replacement prosthesis - Google Patents

Force-closed knee replacement prosthesis Download PDF

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Publication number
CN101653387A
CN101653387A CN 200910092736 CN200910092736A CN101653387A CN 101653387 A CN101653387 A CN 101653387A CN 200910092736 CN200910092736 CN 200910092736 CN 200910092736 A CN200910092736 A CN 200910092736A CN 101653387 A CN101653387 A CN 101653387A
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CN
China
Prior art keywords
spherical shell
ball
socket
bearing
link rod
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN 200910092736
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Chinese (zh)
Other versions
CN101653387B (en
Inventor
黄荣瑛
许勇刚
徐强
郑红光
郭云飞
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Beihang University
Beijing University of Aeronautics and Astronautics
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Beihang University
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Priority to CN 200910092736 priority Critical patent/CN101653387B/en
Publication of CN101653387A publication Critical patent/CN101653387A/en
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Publication of CN101653387B publication Critical patent/CN101653387B/en
Expired - Fee Related legal-status Critical Current
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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/38Joints for elbows or knees
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof

Abstract

The invention discloses a force-closed knee replacement prosthesis which is composed of a thighbone prosthesis, a thighbone support, a shin bone support, a rotating link rod component, an anterior cruciate ligament branched chain and a posterior cruciate ligament branched chain; the thighbone prosthesis is arranged on the thighbone support, and the rotating link rod component, the anterior cruciate ligament branched chain and the posterior cruciate ligament branched chain are arranged between the thighbone support and the shin bone support. The patellar surface profile of the thighbone prosthesis is a 3D thighbone patellar surface profile which is re-built by thighbone CT/MRI scanning based on knee joints of a replaced person. In the force-closed knee replacement prosthesis, the anterior cruciate ligament branched chain adopts a fixed long rod piece structure, and the posterior cruciate ligament branched chain adopts a spherical hinge with a spring structure to be connected, so as to avoid the phenomenon of negative bending angle and overlarge bending angle in the bending/stretching process of the joints and be capable of realizing bending movement of the knee joint prosthesis within a range of from 0 degree to 135 degrees.

Description

Force-closed knee joint replacement prosthesis
Technical field
The present invention relates to a kind of joint replacement prosthese, more particularly say, be meant a kind of kneed force-closed joint replacement prosthese that is used for, belong to medical device.
Background technology
At present, the application of orthopaedics artificial joint more and more widely, for many joint patients have recovered function of joint, most at present existing artificial jointes belong to open architecture, be prone to the phenomenon that gets loose between femoral prosthesis and tibial prosthesis, the higher pairs that adopt connect more between the prosthetic component in addition, and this all can cause a large amount of wearing and tearing of contact portion, also can cause second operation when serious and cause the joint pathological changes because of abrasive particle.
Summary of the invention
The purpose of this invention is to provide a kind of force-closed knee joint replacement prosthesis, the kneed biological structure design of this prosthese apery body, by the approximate isometric characteristic of anterior cruciate ligament side chain in the flexion/extension of joint, the anterior cruciate ligament side chain is set to the stock that waits that two ends are ball pivot.The facies patellaris of femoral prosthesis adopt human body knee joint CT/MRI scanogram the reconstruct pattern the contoured surface match and get.The body of replacement prosthesis of the present invention is to design by the space parallel mechanism that the knee joint biological structure is set up, and kinematic pair can reduce wear under the condition that satisfies the joint motions requirement based on lower pair simultaneously.
The present invention is a kind of force-closed knee joint replacement prosthesis, and this replacement prosthesis is made of femoral prosthesis, femur bearing, tibial bearing, rotation link rod assembly, anterior cruciate ligament side chain and posterior cruciate ligament side chain.Femoral prosthesis is installed on the femur bearing, rotates link rod assembly, anterior cruciate ligament side chain and posterior cruciate ligament side chain and is installed between femur bearing and the tibial bearing.
Force-closed knee joint replacement prosthesis advantage of the present invention is:
1. by rotating the parallel connection between link rod assembly, anterior cruciate ligament side chain and posterior cruciate ligament side chain realization femur bearing and the tibial bearing, both bionical in kneed biological draw bail, make femur bearing and tibial bearing form enclosed again and connect, eliminate the defective that two joints get loose in the open type replacement prosthesis structure.
2. the posterior cruciate ligament side chain adopts spring structure, realizes the force-closed structure between femoral prosthesis and the tibial prosthesis, can reconcile the power coordination of femoral prosthesis and tibial prosthesis in the knee joint flexion/extension by spring.
3. anterior cruciate ligament side chain, posterior cruciate ligament side chain adopt spherical hinge structure to connect with femur bearing, tibial bearing respectively, rotate the link rod assembly and connect with the femur bearing by the cooperation of hole axle.In connecting, member, reduced the friction and wear in the replacement prosthesis joint motions effectively mainly based on the lower pair connection.
4. the facies patellaris profile of femoral prosthesis is based on by the kneed femur CT/MRI of displacer scan rebuilding 3D facies patellaris femoris profile, result of study according to synosteology, the condyle of femur rear portion is approximately spherical structure, model is optimized in the match that utilizes space mechanism's screw theory, method of least square to set up knee joint femoral prosthesis facies patellaris, find the solution the facies patellaris profile with MATLAB, ADAMS emulation, make femur bearing and tibial bearing more near human-body biological shin-femoral joint, have good joint contact and good load.
5. adopt fixed length member structure, posterior cruciate ligament side chain to adopt the ball pivot of spring structure to connect by the anterior cruciate ligament side chain, avoid in the flexion/extension of joint flexion angle to be negative and excessive phenomenon, can realize the curvature movement in 0 °~135 ° scopes of artificial limb knee-joint.
Description of drawings
Fig. 1 is the structure chart of the force-closed knee joint replacement prosthesis of the present invention.
Figure 1A is another visual angle structure chart of the force-closed knee joint replacement prosthesis of the present invention.
Figure 1B is the structure chart of the internal motion part of the force-closed knee joint replacement prosthesis of the present invention.
Fig. 2 is the structure chart of femur bearing of the present invention.
Fig. 2 A is the structure chart of looking up angle of femur bearing of the present invention.
Fig. 2 B is the structure chart of the backsight angle of femur bearing of the present invention.
Fig. 3 is the structure chart of tibial bearing of the present invention.
Fig. 4 is the structure chart of the positive angle of femoral prosthesis of the present invention.
Fig. 4 A is the structure chart of the backsight angle of femoral prosthesis of the present invention.
Fig. 5 is the exploded view of rotation link rod assembly of the present invention.
Fig. 6 is a preceding exploded view of handing over the ligament side chain of the present invention.
Fig. 7 is the exploded view that the ligament side chain is handed in back of the present invention.
: 1. 11. 12. 13.131.F 132. 14. 2. 21.22. 221.A 23. 231.A 232.B24. 241.A 242. 243. 25.251.A 252.B 253.C 26. 261.3. 31. 32. 33.C 331.B34.D 35.F 351.D 36.E 361.E4. 41. 42.A 421. 422.B423. 424. 43. 431. 432.5. 51.A 511.C 512.A52.B 521.D 522.B 53.B 531.A532.B 6. 61.C 611.E612.C 62.D 621.F 622.D 63.C631. 64.D 641. 642.C 643. 65.
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
The present invention is a kind of force-closed knee joint replacement prosthesis, and this replacement prosthesis is based on the full knee joint transposing prosthesis of space parallel mechanism theory, apery body knee joint distal femur, belongs to the biomedical engineering technology field.Shown in Fig. 1, Figure 1A, Figure 1B, force-closed knee joint replacement prosthesis of the present invention is made of femoral prosthesis 1, femur bearing 2, tibial bearing 3, rotation link rod assembly 4, anterior cruciate ligament side chain 5 and posterior cruciate ligament side chain 6.Femoral prosthesis 1 is installed on the femur bearing 2, rotates link rod assembly 4, anterior cruciate ligament side chain 5 and posterior cruciate ligament side chain 6 and is installed in respectively between femur bearing 2 and the tibial bearing 3.By rotating the parallel connection that link rod assembly 4, anterior cruciate ligament side chain 5 and posterior cruciate ligament side chain 6 are realized between femur bearing 2 and the tibial bearing 3, both bionical in kneed biological draw bail, make femur bearing 2 form enclosed again and connect with tibial bearing 3.
(1) femoral prosthesis 1
Shown in Fig. 1, Figure 1A, Fig. 4, Fig. 4 A, femoral prosthesis 1 is the configuration of apery body knee joint distal femur, and is one machine-shaping part.Femoral prosthesis 1 is provided with facies patellaris 11, lateral condyle 12, connecting plate 13, and the lower end of facies patellaris 11 is lateral condyle 12, connecting plate 13, and is provided with intercondylar fossa 14 between lateral condyle 12 and the connecting plate 13.Facies patellaris 11 is made of many irregular contour lines, and this contour line dots in the drawings, and in the present invention, it is in order to illustrate that more clearly facies patellaris 11 is the configuration of apery body knee joint distal femur that the inventor uses " dotted line ".Facies patellaris 11 profiles are based on by the kneed femur CT/MRI of displacer scan rebuilding 3D facies patellaris femoris profile, result of study according to synosteology, the condyle of femur rear portion is approximately spherical structure, model is optimized in the match that utilizes space mechanism's screw theory, method of least square to set up knee joint femoral prosthesis facies patellaris, find the solution the facies patellaris profile with MATLAB, ADAMS emulation, make femur bearing 2 and tibial bearing 3 more near human-body biological shin-femoral joint, have good joint contact and good load.
Connecting plate 13 is provided with F screwed hole 131, and this F screwed hole 131 was realized femoral prosthesis 1 is installed on the connecting plate 22 of femur bearing 2 with cooperating of screw.
(2) the femur bearing 2
Shown in Fig. 1, Figure 1A, Fig. 2, Fig. 2 A, Fig. 2 B, femur bearing 2 is provided with femur union joint 21, connecting plate 22, upper backup pad 23, outer panel 24, interior plate 25 and back side panel 26, is provided with cavity 242 between outer panel 24 and the interior plate 25;
Femur union joint 21 is located on the top panel of upper backup pad 23.
The lower panel of upper backup pad 23 is provided with A ball-and-socket 231, and is located at the B screwed hole 232 around the A ball-and-socket 231; A ball-and-socket 231 is used to place A bulb 531; B screwed hole 232 be used for cooperating of screw realizing A spherical shell 51 is installed in A ball-and-socket 231 places.
Connecting plate 22 is provided with a plurality of A counter sinks 221, and this A counter sink 221 cooperates with F screwed hole 131, thus and the installation of using screw realization femur bearing 2 and femoral prosthesis 1.
Outer panel 24 is provided with A through hole 241, and the flexion axis 43 that this A through hole 241 is used for rotating link rod assembly 4 is passed through the end of thread 432.
One plate face of interior plate 25 is provided with A screwed hole 251, and these A screwed hole 251 female threads are connected with the end of thread 432 that rotates the flexion axis 43 in the link rod assembly 4; Another plate face of interior plate 25 is provided with B ball-and-socket 252, C screwed hole 253, and B ball-and-socket 252 is used to place C bulb 63, C screwed hole 253 be used for cooperating of screw realizing C spherical shell 61 is installed in B ball-and-socket 252 places.
Back side panel 26 is provided with semicircle concave station 261, and this semicircle concave station 261 helps the motion of D bulb 64.
(3) tibial bearing 3
Referring to Fig. 1, Figure 1A, shown in Figure 3, the support panel 31 of tibial bearing 3 is provided with C ball-and-socket 33, D ball-and-socket 34, F ball-and-socket 35, E ball-and-socket 36; The bottom of tibial bearing 3 is provided with tibia union joint 32.F ball-and-socket 35 is arranged on the radial centre lines with E ball-and-socket 36, and this radial centre lines also is the line of the nest centre of sphere of the nest centre of sphere of F ball-and-socket 35 and E ball-and-socket 36; C ball-and-socket 33 is arranged on the longitudinal center line with D ball-and-socket 34, and this longitudinal center line also is the line of the nest centre of sphere of the nest centre of sphere of C ball-and-socket 33 and D ball-and-socket 34.
The center of C ball-and-socket 33 is provided with B counter sink 331, the link 423 that rotates A link rod 42 in the link rod assembly 4 is installed in this B counter sink 331, and (end of link 423 is provided with screwed hole, not shown), and screw 41 is connected with the screwed hole that link 423 is provided with from the bottom of tibial bearing 3, the boss 424 that utilizes A link rod 42 to be provided with is installed on the tibial bearing 3 thereby realized rotating link rod assembly 4.
Be provided with D screwed hole 351 around the F ball-and-socket 35, this D screwed hole 351 be used for realization cooperating of screw B spherical shell 52 be installed in F ball-and-socket 35 places.
Be provided with E screwed hole 361 around the E ball-and-socket 36, this E screwed hole 361 be used for realization cooperating of screw D spherical shell 62 be installed in E ball-and-socket 36 places.
(4) rotate link rod assembly 4
Referring to Fig. 1, Figure 1A, Figure 1B, shown in Figure 7, to rotate link rod assembly 4 and include screw 41, A link rod 42, flexion axis 43, flexion axis 43 is socketed in the bearing holder (housing, cover) 421 of A link rod 42.
One end of A link rod 42 is a link 423, and the other end of A link rod 42 is a bearing holder (housing, cover) 421, and the centre of bearing holder (housing, cover) 421 is through holes 422, and this through hole 422 is used for flexion axis 43 and passes; A link rod 42 to the flex point place of link 423 is provided with boss 424, and this boss 424 plays the effect of back-up ring when realizing the installation of rotation link rod assembly 4 and tibial bearing 3.This bearing holder (housing, cover) 421 is socketed on the flexion axis 43, and places in the outer panel 24 and the cavity 242 between the interior plate 25 of femur bearing 2.
Flexion axis 43 is a column structure, and an end of flexion axis 43 is provided with draw-in groove 431, and the other end of flexion axis 43 is the end of thread 432.This draw-in groove 431 is used for place tool (as screwdriver), realizes the A screwed hole 251 on the interior plate 25 of the end of thread 432 of flexion axis 43 and femur bearing 2 is connected by this instrument.
In the present invention, rotate link rod assembly 4 structure Design and need consider that two revolute pairs can resist the suitable problem of active force and joint angle in curvature movement vertically.For the opposing axial force, rotating between link rod assembly 4 and the femoral prosthesis 1 is revolute pair, realize by the flexion axis 43 that is connected in the bearing holder (housing, cover) 421, wherein flexion axis 43 is connected (as accompanying drawing 1, Figure 1A) by screw thread with femur bearing 2, and the revolute pair of rotating between link rod assembly 4 and the tibial bearing 2 realizes (as accompanying drawing 7) by construction features of rotating link rod assembly 4 and the supporting screw 41 that is connected on the rotation link rod assembly 4.
In the present invention, in order to realize that femoral prosthesis 1 relatively and the curvature movement of the proper angle of femur bearing 2, tibial bearing 3, be provided with limited block 243 (this limited block 243 cooperates with block on the bearing holder (housing, cover) 421) on the outer panel 24 of femur bearing 2, this limited block 243 is a sector structure, its outer with A through hole 241 engages, as the center with A through hole 241 is the center of circle, and then this segmental angle is 135 °.Therefore, rotate link rod assembly 4 bearing holder (housing, cover) 421 (on the bearing holder (housing, cover) 421 projection be block, this block cooperates with limited block 243) slewing area be 0 °~135 °, so just avoided the excessive problem of flexion angle.
(5) the anterior cruciate ligament side chain 5
Referring to Fig. 1, Figure 1A, Figure 1B, shown in Figure 5, anterior cruciate ligament side chain 5 includes A spherical shell 51, B spherical shell 52 and B link rod 53.
The center of A spherical shell 51 is through holes, and this through hole is used to place A bulb 531, and A spherical shell 51 is provided with C counter sink 511, and this C counter sink 511 cooperates with B screwed hole 232, thereby and uses screw and realize A spherical shell 51 is installed on the femur bearing 2.A spherical shell 51 is provided with A opening 512, and this A opening 512 is used to make an end of B link rod to pass through.
The center of B spherical shell 52 is through holes, and this through hole is used to place B bulb 532, and B spherical shell 52 is provided with D counter sink 521, and this D counter sink 521 cooperates with D screwed hole 351, thereby and uses screw and realize B spherical shell 52 is installed on the tibial bearing 3.B spherical shell 52 is provided with B opening 522, and the other end that this B opening 522 is used for the B link rod passes through.
One end of B link rod 53 is provided with A bulb 531, and the other end of B link rod 53 is provided with B bulb 532.
The installation of anterior cruciate ligament side chain 5: 1. the link rod part of A bulb 531 is passed through the A opening 512 on the A spherical shell 51 earlier; 2. the C counter sink 511 on the A spherical shell 51 is cooperated with B screwed hole 232; 3. pass C counter sink 511 rear threads with screw and be connected in the B screwed hole 232, thus the installation of realization A bulb 531; 4. the link rod of B bulb 532 part is earlier by the B opening 522 on the B spherical shell 52; 5. the D counter sink 521 on the B spherical shell 52 is cooperated with F screwed hole 351; 6. the reuse screw passes D counter sink 521 rear threads and is connected in the F screwed hole 351, thereby realizes the installation of B bulb 532.
(6) the posterior cruciate ligament side chain 6
Referring to Fig. 1, Figure 1A, Figure 1B, shown in Figure 6, posterior cruciate ligament side chain 6 includes C spherical shell 61, D spherical shell 62, C bulb 63, D bulb 64 and spring 65.
The center of C spherical shell 61 is through holes, and this through hole is used to place C bulb 63, and C spherical shell 61 is provided with E counter sink 611, and this E counter sink 611 cooperates with C screwed hole 253, thereby and uses screw and realize C spherical shell 61 is installed on the femur bearing 2.C spherical shell 61 is provided with C opening 612, and this C opening 612 is used to make the upper plug head 631 of C bulb 63 to pass through.
The center of D spherical shell 62 is through holes, and this through hole is used to place D bulb 64, and D spherical shell 62 is provided with F counter sink 621, and this F counter sink 621 cooperates with E screwed hole 361, thereby and uses screw and realize D spherical shell 62 is installed on the tibial bearing 3.D spherical shell 62 is provided with D opening 622, and the sleeve 641 that this D opening 522 is used on the D bulb 64 passes through.
C bulb 63 is provided with plug 631, and this plug 631 places in the cavity 643 of the sleeve 641 on the D bulb 64.
D bulb 64 is provided with sleeve 641, the cylindrical shell of sleeve 641 is provided with through hole 642 (biofluid that this through hole 642 is used for human body passes through, and plays lubricated effect), and the center of sleeve 641 is a cavity 643, place spring 65 in the cavity 643 earlier, then with on 631 tops of the plug on the C bulb 63.
The installation of posterior cruciate ligament side chain 6: 1. the plug on the C bulb 63 631 is passed through the C opening 612 on the C spherical shell 61 earlier; 2. the E counter sink 611 on the C spherical shell 61 is cooperated with C screwed hole 253; 3. pass E counter sink 611 rear threads with screw and be connected in the C screwed hole 253, thus the installation of realization C bulb 63; 4. the sleeve on the D bulb 64 641 is earlier by the D opening 622 on the D spherical shell 62; 5. the F counter sink 621 on the D spherical shell 62 is cooperated with E screwed hole 361; 6. pass F counter sink 621 rear threads with screw and be connected in the E screwed hole 361, thus the installation of realization D bulb 64.
In the present invention, posterior cruciate ligament side chain 6 has taken into full account the tension force in the curvature movement process in design and joint motions has been played cushioning effect, therefore adopt ball adjutant C bulb 63 to be connected with femur bearing 2 by C spherical shell 61, D bulb 64 connects with tibial bearing 3 by D spherical shell 62, C bulb 63 and D bulb 64 adopt cylindrical pairs, spring 65 to connect, utilized tension force that spring 65 provides in the curvature movement process and played cushioning effect.
The motion principle of force-closed knee joint replacement prosthesis of the present invention is: the femur union joint 21 on the femur bearing 2 is installed to by in the displacement human femur under loading far-end, by biological cement femur bearing 2 and human femur under loading are connected firmly, tibia union joint 32 on the tibial bearing 3 is installed to by in the displacement human tibia, equally, by biological cement tibial bearing and quilt displacement human tibia are connected firmly.When femoral prosthesis 1 is done curvature movement (direction of arrow as shown in Figure 1) with respect to tibial bearing 3, driving human femur under loading neck of femur axis in the hip joint by femoral prosthesis 1 rotates, make human femur under loading do curvature movement, the motion of femur and tibia is synthetic, realizes the human body lower limbs motion.
The force-closed knee joint replacement prosthesis of the present invention's design, it is theory in conjunction with space parallel mechanism, taken into full account the deficiency that higher pair connects in joint curvature movement characteristic and the traditional knee joint replacement prosthesis in the design, designed the force-closed knee joint replacement prosthesis that connects by lower pair, and avoided flexion angle to be negative and excessive problem, make artificial limb knee-joint can realize the curvature movement in 0 °~135 ° scopes.

Claims (7)

1, a kind of force-closed knee joint replacement prosthesis is characterized in that: this force-closed knee joint replacement prosthesis is made of femoral prosthesis (1), femur bearing (2), tibial bearing (3), rotation link rod assembly (4), anterior cruciate ligament side chain (5) and posterior cruciate ligament side chain (6);
Femoral prosthesis (1) is provided with facies patellaris (11), lateral condyle (12), connecting plate (13), and the lower end of facies patellaris (11) is lateral condyle (12), connecting plate (13), and is provided with intercondylar fossa (14) between lateral condyle (12) and the connecting plate (13); Connecting plate (13) is provided with F screwed hole (131), and this F screwed hole (131) was realized femoral prosthesis (1) is installed on the connecting plate (22) of femur bearing (2) with cooperating of screw;
Femur bearing (2) is provided with femur union joint (21), connecting plate (22), upper backup pad (23), outer panel (24), interior plate (25) and back side panel (26), is provided with cavity (242) between outer panel (24) and the interior plate (25); Femur union joint (21) is located on the top panel of upper backup pad (23); The lower panel of upper backup pad (23) is provided with A ball-and-socket (231), and is located at A ball-and-socket (231) B screwed hole (232) all around; A ball-and-socket (231) is used to place A bulb (531); B screwed hole (232) be used for realizing that A spherical shell (51) is installed in A ball-and-socket (231) to be located cooperating of screw; Connecting plate (22) is provided with A counter sink (221), and this A counter sink (221) cooperates with F screwed hole (131), thereby and use the installation that screw is realized femur bearing (2) and femoral prosthesis (1); Outer panel (24) is provided with A through hole (241), and the flexion axis (43) that this A through hole (241) is used for rotating link rod assembly (4) is passed through the end of thread (432); One plate face of interior plate (25) is provided with A screwed hole (251), and this A screwed hole (251) female thread is connected with the end of thread (432) that rotates the flexion axis (43) in the link rod assembly (4); Another plate face of interior plate (25) is provided with B ball-and-socket (252), C screwed hole (253), and B ball-and-socket (252) is used to place C bulb (63), C screwed hole (253) be used for realizing that C spherical shell (61) is installed in B ball-and-socket (252) to be located cooperating of screw; Back side panel (26) is provided with semicircle concave station (261), and this semicircle concave station (261) helps the motion of D bulb (64);
The support panel (31) of tibial bearing (3) is provided with C ball-and-socket (33), D ball-and-socket (34), F ball-and-socket (35), E ball-and-socket (36); The bottom of tibial bearing (3) is provided with tibia union joint (32); F ball-and-socket (35) is arranged on the radial centre lines with E ball-and-socket (36), and C ball-and-socket (33) is arranged on the longitudinal center line with D ball-and-socket (34); The center of C ball-and-socket (33) is provided with B counter sink (331), and the link (423) that rotates A link rod (42) in the link rod assembly (4) is installed in this B counter sink (331); Be provided with D screwed hole (351) around the F ball-and-socket (35), this D screwed hole (351) be used for realization cooperating of screw and B spherical shell (52) is installed in F ball-and-socket (35) locates; Be provided with E screwed hole (361) around the E ball-and-socket (36), this E screwed hole (361) be used for realization cooperating of screw and D spherical shell (62) is installed in E ball-and-socket (36) locates;
Rotate link rod assembly (4) and include screw (41), A link rod (42), flexion axis (43), flexion axis (43) is socketed in the bearing holder (housing, cover) (421) of A link rod (42); One end of A link rod (42) is link (423), and the other end of A link rod (42) is bearing holder (housing, cover) (421), and the centre of bearing holder (housing, cover) (421) is B through hole (422), and this B through hole (422) is used for flexion axis (43) and passes; A link rod (42) to the flex point place of link (423) is provided with boss (424); This bearing holder (housing, cover) (421) is socketed on the flexion axis (43), and places in the outer panel (24) and the cavity (242) between the interior plate (25) of femur bearing (2); Flexion axis (43) is a column structure, and an end of flexion axis (43) is provided with draw-in groove (431), and the other end of flexion axis (43) is the end of thread (432), and the A screwed hole (251) on the interior plate (25) of the end of thread (432) and femur bearing (2) is connected;
Anterior cruciate ligament side chain (5) includes A spherical shell (51), B spherical shell (52) and B link rod (53); The center of A spherical shell (51) is a through hole, this through hole is used to place A bulb (531), A spherical shell (51) is provided with C counter sink (511), and this C counter sink (511) cooperates with B screwed hole (232), thereby and use screw and realize A spherical shell (51) is installed on the femur bearing (2); A spherical shell (51) is provided with A opening (512), and this A opening (512) is used to make an end of B link rod to pass through; The center of B spherical shell (52) is a through hole, this through hole is used to place B bulb (532), B spherical shell (52) is provided with D counter sink (521), and this D counter sink (521) cooperates with D screwed hole (351), thereby and use screw and realize B spherical shell (52) is installed on the tibial bearing (3); B spherical shell (52) is provided with B opening (522), and the other end that this B opening (522) is used for the B link rod passes through; One end of B link rod (53) is provided with A bulb (531), and the other end of B link rod (53) is provided with B bulb (532);
Posterior cruciate ligament side chain (6) includes C spherical shell (61), D spherical shell (62), C bulb (63), D bulb (64) and spring (65); The center of C spherical shell (61) is a through hole, this through hole is used to place C bulb (63), C spherical shell (61) is provided with E counter sink (611), and this E counter sink (611) cooperates with C screwed hole (253), thereby and use screw and realize C spherical shell (61) is installed on the femur bearing (2); C spherical shell (61) is provided with C opening (612), and this C opening (612) is used to make the upper plug head (631) of C bulb (63) to pass through; The center of D spherical shell (62) is a through hole, this through hole is used to place D bulb (64), D spherical shell (62) is provided with F counter sink (621), and this F counter sink (621) cooperates with E screwed hole (361), thereby and use screw and realize D spherical shell (62) is installed on the tibial bearing (3); D spherical shell (62) is provided with D opening (622), and the sleeve (641) that this D opening (522) is used on the D bulb (64) passes through; C bulb (63) is provided with plug (631), and this plug (631) places in the cavity (643) of the sleeve (641) on the D bulb (64); D bulb (64) is provided with sleeve (641), and the cylindrical shell of sleeve (641) is provided with C through hole (642), and the center of sleeve (641) is a cavity (643), places spring (65) in the cavity (643) earlier, uses then on plug (631) top on the C bulb (63).
2, force-closed knee joint replacement prosthesis according to claim 1 is characterized in that: this replacement prosthesis is based on the full knee joint transposing prosthesis of space parallel mechanism theory, apery body knee joint distal femur, belongs to the biomedical engineering technology field.
3, force-closed knee joint replacement prosthesis according to claim 1, it is characterized in that: this replacement prosthesis is by rotating the parallel connection between link rod assembly (4), anterior cruciate ligament side chain (5) and posterior cruciate ligament side chain (6) realization femur bearing (2) and the tibial bearing (3), both bionical in kneed biological draw bail, make femur bearing and tibial bearing (3) form enclosed again and connect.
4, force-closed knee joint replacement prosthesis according to claim 1 is characterized in that: femoral prosthesis (1) is the configuration of apery body knee joint distal femur, and is one machine-shaping part.
5, force-closed knee joint replacement prosthesis according to claim 1 is characterized in that: facies patellaris (11) profile is based on by the kneed femur CT/MRI of displacer scan rebuilding 3D facies patellaris femoris profile.
6, force-closed knee joint replacement prosthesis according to claim 1, it is characterized in that: adopt fixed length member structure, posterior cruciate ligament side chain 6 to adopt the ball pivot of spring structure to connect by anterior cruciate ligament side chain 5, avoid in the flexion/extension of joint flexion angle to be negative and excessive phenomenon, can realize the curvature movement in 0 °~135 ° scopes of artificial limb knee-joint.
7, force-closed knee joint replacement prosthesis according to claim 1, it is characterized in that: the protruding block by the bearing holder (housing, cover) (421) on the limited block (243) on the outer panel (24) of femur bearing (2) and the A link rod (42) cooperates, and makes that the slewing area of bearing holder (housing, cover) (421) is 0 °~135 °.
CN 200910092736 2009-09-24 2009-09-24 Force-closed knee replacement prosthesis Expired - Fee Related CN101653387B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103565559A (en) * 2012-08-03 2014-02-12 北京大学人民医院 Double-acting type artificial knee joint prosthesis
CN103655007A (en) * 2012-08-31 2014-03-26 北京纳通科技集团有限公司 Tibia base element and knee joint prosthesis
RU2511400C1 (en) * 2012-11-30 2014-04-10 Александр Михайлович Чмутов Method for magnetic-resonant tomography to detect front knee instability
CN106264731A (en) * 2016-10-11 2017-01-04 昆明医科大学第附属医院 A kind of method based on point-to-point registration technique virtual knee joint single condyle replacement model construction
CN106821552A (en) * 2017-01-23 2017-06-13 太原理工大学 A kind of method for designing of customized artificial knee joint prosthesis
CN111179716A (en) * 2020-01-08 2020-05-19 四川大学华西医院 Three-dimensional printing model based on knee joint posterior cruciate ligament reconstruction

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103565559A (en) * 2012-08-03 2014-02-12 北京大学人民医院 Double-acting type artificial knee joint prosthesis
CN103565559B (en) * 2012-08-03 2015-08-26 北京大学人民医院 A kind of two ejector half artificial knee joint prosthesis
CN103655007A (en) * 2012-08-31 2014-03-26 北京纳通科技集团有限公司 Tibia base element and knee joint prosthesis
CN103655007B (en) * 2012-08-31 2016-06-22 北京纳通科技集团有限公司 Tibial base element and knee-joint prosthesis
RU2511400C1 (en) * 2012-11-30 2014-04-10 Александр Михайлович Чмутов Method for magnetic-resonant tomography to detect front knee instability
CN106264731A (en) * 2016-10-11 2017-01-04 昆明医科大学第附属医院 A kind of method based on point-to-point registration technique virtual knee joint single condyle replacement model construction
CN106264731B (en) * 2016-10-11 2019-07-16 昆明医科大学第一附属医院 A method of based on the virtual knee joint single condyle displacement technique model construction of point-to-point registration technique
CN106821552A (en) * 2017-01-23 2017-06-13 太原理工大学 A kind of method for designing of customized artificial knee joint prosthesis
CN106821552B (en) * 2017-01-23 2018-08-21 太原理工大学 A kind of design method of customized artificial knee joint prosthesis
CN111179716A (en) * 2020-01-08 2020-05-19 四川大学华西医院 Three-dimensional printing model based on knee joint posterior cruciate ligament reconstruction

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