CN110840630A - Tibial plateau holds in palm and uses its knee joint prosthesis - Google Patents
Tibial plateau holds in palm and uses its knee joint prosthesis Download PDFInfo
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- CN110840630A CN110840630A CN201911173597.9A CN201911173597A CN110840630A CN 110840630 A CN110840630 A CN 110840630A CN 201911173597 A CN201911173597 A CN 201911173597A CN 110840630 A CN110840630 A CN 110840630A
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- 210000000629 knee joint Anatomy 0.000 title abstract description 17
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 93
- 210000002303 tibia Anatomy 0.000 claims abstract description 68
- 230000007547 defect Effects 0.000 claims abstract description 30
- 210000003127 knee Anatomy 0.000 claims abstract description 9
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 5
- 238000004372 laser cladding Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- 238000002513 implantation Methods 0.000 abstract description 7
- 239000011148 porous material Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 210000000281 joint capsule Anatomy 0.000 description 3
- 230000025712 muscle attachment Effects 0.000 description 3
- 230000002980 postoperative effect Effects 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007943 implant Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 208000024779 Comminuted Fractures Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 210000001185 bone marrow Anatomy 0.000 description 1
- 230000009193 crawling Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000013150 knee replacement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000000963 osteoblast Anatomy 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
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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
- A61F2/389—Tibial components
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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 belongs to the technical field of medical prostheses, and discloses a tibial plateau support and a knee joint prosthesis applying the same. This tibial plateau holds in palm includes: a platform support portion for connection with a pad of a knee prosthesis; the platform support connecting part is formed at the bottom of the platform support supporting part and is used for being implanted into a medullary cavity of the human tibia so as to be connected with the human tibia, the platform support connecting part comprises an abutting prosthesis which is connected with the bottom surface of the platform support supporting part and is used for abutting against a osteotomy surface of the human tibia, and a filling prosthesis which is connected with the abutting prosthesis and extends along the part far away from the platform support supporting part, and the filling prosthesis is used for filling a bone defect part of the human tibia; and at least one fixing part which is used for penetrating the tibia of the human body and connecting the filling prosthesis with the filling prosthesis so as to fix the filling prosthesis on the tibia of the human body. The tibial plateau tray according to the invention can be adapted for partial bone removal and is more stable after implantation.
Description
Technical Field
The invention belongs to the technical field of medical prostheses, and particularly relates to a tibial plateau support and a knee joint prosthesis applying the same.
Background
Knee prostheses are surgical implants used to replace the knee, which are used in a resurfacing knee replacement procedure for the knee, treating a damaged knee and replacing it with a knee prosthesis. The existing knee joint prosthesis mainly comprises: the tibial plateau support comprises a femoral prosthesis for coupling to a femur of a human body and a tibial plateau support for coupling to a tibia of a human body, and a liner positioned between the femoral prosthesis and the tibial plateau support.
The tibial plateau among the prior art holds in the palm mainly by two parts: a platform support portion for coupling to a spacer of a knee joint prosthesis and a platform support connection portion for implantation in a medullary cavity of a human tibia to couple to the human tibia. In order to improve the stability of the tibial platform support connected with the human body, the platform support connecting part is usually constructed into a complete cone structure, and under the condition of severe bone defect caused by knee joint revision, tumor, comminuted fracture and the like, the cone structure can be provided with more filling bodies to better fill the severe bone defect part, so that the stability of the tibial platform support connected with the human body is improved. However, the affected area of the patient has less damaged bone, which makes the prior art tibial plateau tray less well implantable, and if implanted, the undamaged bone needs to be removed, which results in: on one hand, if too much bone is removed, the tibia can be shortened, so that the affected side is obviously shortened compared with the healthy side, the function is limited, and great trauma can be caused to the body and the mind of a patient; on the other hand, the removal of undamaged bone directly results in a reduction in the strength of the knee joint. In addition, the platform support connecting part in the prior art is often constructed in a solid structure, which results in the defect of muscle attachment points and the damage of joint capsules caused by a large amount of bone defects on the tibia side of the knee joint under the condition of serious bone defects, thereby directly generating the problem of poor stability of the knee joint prosthesis after replacement.
In view of the deficiencies of the prior art, there is a need for a tibial plateau tray that is more stable after implantation and that is suitable for partial bone removal to compensate for the deficiencies of the prior art.
Disclosure of Invention
In order to be able to adapt to the removal of part of the bone and to be more stable after implantation, the invention aims to provide a tibial plateau tray.
The tibial plateau tray according to the invention comprises: a platform support portion for connection with a pad of a knee prosthesis; the platform support connecting part is formed at the bottom of the platform support supporting part and is used for being implanted into a medullary cavity of the human tibia so as to be connected with the human tibia, the platform support connecting part comprises an abutting prosthesis which is connected with the bottom surface of the platform support supporting part and is used for abutting against a osteotomy surface of the human tibia, and a filling prosthesis which is connected with the abutting prosthesis and extends along the part far away from the platform support supporting part, and the filling prosthesis is used for filling a bone defect part of the human tibia; and at least one fixing part which is used for penetrating the tibia of the human body and connecting the filling prosthesis with the filling prosthesis so as to fix the filling prosthesis on the tibia of the human body.
Further, the tibial plateau support also includes a three-dimensional porous structural layer formed on the bottom surface of the plateau support and/or on the outer surface of the abutment prosthesis and/or on the outer surface of the filler prosthesis.
Further, the one side structure of keeping away from the platform of butt prosthesis holds in the palm the supporting part is the first plane, fills the prosthesis and includes the vertical face of perpendicular connection in the first plane, and extends to the first cambered surface that fills of the bottom surface of platform support supporting part from the one end of keeping away from the first plane of vertical face, and the first cambered surface that fills matches with the shape of the bone defect department of human shin bone.
Further, the one side structure of keeping away from platform support supporting part of butt prosthesis is the second plane, and the filling prosthesis includes the inclined plane of being connected with the second plane becomes the contained angle, and extends to the second cambered surface of filling of the bottom surface of platform support supporting part from the one end of keeping away from the second plane of inclined plane, and the second fills the shape phase-match of cambered surface and the bone defect department of human shin bone.
Further, the platform support connecting part also comprises an extension prosthesis which extends from one end, far away from the abutting prosthesis, of the filling prosthesis along the direction far away from the abutting prosthesis, and a three-dimensional porous structure layer is formed on the surface of the extension prosthesis.
Further, the fixing element comprises at least two bone nails, the platform connecting part comprises threaded holes which are formed on the filling prosthesis and/or the extension prosthesis and are in threaded connection with the bone nails, and a three-dimensional porous structure layer is formed on the surface of the bone nails and/or the inner surface of the threaded holes.
Further, the axes of the threaded holes are arranged at an included angle.
Furthermore, a groove is formed in the surface, connected with the platform support connecting part, of the platform support supporting part, and a three-dimensional porous structure layer is filled in the groove.
Further, the three-dimensional porous structure layer is processed by a laser cladding technology.
The invention also provides a knee joint prosthesis which comprises the tibial plateau support.
Compared with the prior art, the tibial plateau tray has the following advantages:
1) the tibial plateau support can be processed by customizing the filling prosthesis, so that when the tibial plateau support is implanted, the implant of the tibial plateau support can be completed only by removing damaged bone and filling the filling prosthesis into the bone defect part without removing undamaged bone of a patient, so that the patient can reserve healthy bone of the human body to the maximum extent, the strength of the knee joint of the patient can be effectively improved, and the motion function of the patient after the operation is better.
2) Only the damaged bone is removed, the healthy bone of the human body is retained to the maximum extent, and the phenomenon of tibia shortening caused by excessive removed bone can be avoided, so that the problems that the affected side of a patient is obviously shortened compared with the healthy side, the function is limited and the like can be effectively avoided.
3) The tibial plateau support of the embodiment of the invention is also fixedly connected with the tibia of a human body through the fixing piece, so that the fixing stability of the tibial plateau support after being implanted is directly improved.
4) The three-dimensional porous structure layers are formed on the bottom surface of the platform support part, the outer surface of the abutting prosthesis and the outer surface of the filling prosthesis, so that the tibial platform support can be favorably and quickly fused and fixed with human bone after operation, and the postoperative recovery effect of a patient can be effectively improved.
5) The tibial plateau tray can also improve the stability of the tibial plateau tray after replacement through the three-dimensional porous structure layer due to the problems of muscle attachment point defect, joint capsule damage and the like caused under the condition of serious bone defect.
Drawings
Fig. 1 is a schematic structural view of a tibial plateau tray according to an embodiment of the present invention, showing a schematic connection of the tibial plateau tray to a human tibia;
FIG. 2 is a schematic structural view of a first embodiment of the platform bracket connection portion shown in FIG. 1;
FIG. 3 is a side view of the first embodiment of the platform bracket connection shown in FIG. 2;
fig. 4 is a schematic structural view of a second embodiment of the platform holder connecting part shown in fig. 1.
Detailed Description
For a better understanding of the objects, structure and function of the invention, a tibial plateau tray of the present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1-4 illustrate the structure of a tibial plateau tray 100 according to an embodiment of the present invention. Fig. 1 is a schematic view illustrating a connection between a tibial plateau tray 100 and a human tibia, fig. 2 is a schematic view illustrating a first embodiment of the tibial plateau tray 100, and fig. 4 is a schematic view illustrating a second embodiment of the tibial plateau tray 100. As shown in fig. 1, the tibial plateau tray 100 includes: a platform support 1 for connection to a pad of a knee joint prosthesis; a platform tray connecting part 2 formed at the bottom of the platform tray supporting part 1 and used for being implanted in the medullary cavity of the human tibia so as to be connected with the human tibia, as shown in fig. 2 and 4, the platform tray connecting part 2 comprises an abutting prosthesis 21 connected with the bottom surface 11 of the platform tray supporting part 1 and used for abutting against the osteotomy surface of the human tibia, and a filling prosthesis 22 connected with the abutting prosthesis 21 and extending along the direction far away from the platform tray supporting part 1, wherein the filling prosthesis 22 is used for filling the bone defect part of the human tibia; at least one fixing member 3, the fixing member 3 being adapted to be coupled to the prosthesis 22 through the tibia of the person to fix the prosthesis 22 to the tibia of the person.
When the tibial plateau tray 100 of the embodiment of the present invention is used, the bone of the affected part of the human tibia is firstly removed to form a tibial medullary cavity, and the surface of the intact bone of the human tibia is cut to form a cut bone plane. When the tibial plateau tray 100 is implanted, the abutting prosthesis 21 abuts against the osteotomy plane of the human tibia, so that healthy bone can support the abutting prosthesis 21, meanwhile, the filling prosthesis 22 is implanted into the tibial bone marrow cavity to fill the bone defect of the human tibia, the fixing element 3 penetrates through the human tibia and is connected with the filling prosthesis 22, so that the filling prosthesis 22 is fixedly connected with the human tibia, and the implantation of the tibial plateau tray 100 according to the embodiment of the present invention is completed.
With the above arrangement, compared with the prior art, the tibial plateau tray 100 of the embodiment of the present invention has the following advantages:
1) the tibial plateau tray 100 of the embodiment of the present invention can be customized to the filling prosthesis 22 to conform to the shape of the bone defect of the human tibia, so that the filling prosthesis 22 can better adapt to the diameter and the degree of curvature of the patient's medullary cavity. Thus, when the tibial plateau support 100 is implanted, the implantation of the tibial plateau support 100 can be completed only by removing damaged bone and filling the bone defect with the filling prosthesis 22 without removing the undamaged bone of the patient, so that the patient can retain the healthy bone of the human body to the maximum extent, the self strength of the knee joint of the patient can be effectively improved, and the motion function of the patient after the operation is better;
2) only the damaged bone is removed, the healthy bone of the human body is retained to the maximum extent, and the phenomenon of tibia shortening caused by excessive removed bone can be avoided, so that the problems that the affected side of a patient is obviously shortened compared with the healthy side, the function is limited and the like can be effectively avoided;
3) the tibial plateau support 100 of the embodiment of the invention is fixedly connected with the tibia of a human body through the fixing piece 3, so that the stability of fixing the tibial plateau support 100 after being implanted is directly improved.
Preferably, the fixture 3 is attachable to the augment 22 via the tibia on one side of the augment 22. By this arrangement, on the one hand, the connection distance of the fixing element 3 to the filling prosthesis 22 can be shortened, thereby further improving the stability of the fixation; on the other hand, damage to the bone due to the fact that the fixing member 3 penetrates through the intact bone can be avoided, and therefore the strength of the intact bone can be effectively guaranteed.
In a preferred embodiment as illustrated in fig. 1, the tibial plateau 100 may further comprise a three-dimensional porous structural layer 4 (shown in connection with fig. 3) formed on the bottom surface 11 of the plateau support 1 and/or on the outer surface of the abutment prosthesis 21 and/or on the outer surface of the filler prosthesis 22. Preferably, the bottom surface 11 of the platform support 1, the outer surface of the abutment prosthesis 21 and the outer surface of the filler prosthesis 22 may each be formed with a three-dimensional porous structure layer 4. According to the invention, the three-dimensional porous structure layer 4 can be constructed into a plurality of pores formed by a plurality of wire diameters and the plurality of wire diameters in a staggered connection mode, and the pores are communicated with each other, so that the structure of the three-dimensional porous structure layer can be closer to the trabecular bone structure of a human body, the adhesion, proliferation and differentiation capabilities of osteoblasts can be effectively improved, and the rapid fusion and fixation of the bone of the human body and the three-dimensional porous structure layer 4 are effectively promoted. Through the arrangement, on one hand, the three-dimensional porous structure layer 4 is formed on the bottom surface 11 of the platform support part 1, the outer surface of the abutting prosthesis 21 and the outer surface of the filling prosthesis 22 of the tibial platform support 100, so that after the tibial platform support 100 is connected with the tibia of a human body, bone can quickly and naturally grow into the pores of the three-dimensional porous structure layer 4, the tibial platform support 100 can be quickly fused and fixed with the bone of the human body after operation, and the postoperative recovery effect of a patient is more effectively improved; on the other hand, in the event of severe bone defect, which may cause problems such as defect of muscle attachment point, damage of joint capsule, etc., the tibial plateau tray 100 according to the embodiment of the present invention may also directly improve the post-replacement stability thereof through better fusion of the three-dimensional porous structure layer 4 and the bone.
Preferably, the porosity of the porous structure layer 4 may range from 50% to 80%, and the pore size may range from 100 μm to 400 μm. The three-dimensional porous structure layer 4 having a high porosity can well induce bone ingrowth, and the three-dimensional porous structure layer 4 having a small pore size can well induce bone crawling. It should be noted that the cross section of each pore formed by the wire diameter is not a regular circle, but the cross sectional shape thereof may be various shapes, and in view of this, reference to "diameter" of each pore herein should be understood to mean the diameter of the circle when the cross section of each pore is equivalent to a circle. Since the diameter of the cross section equivalent to a circle is calculated from the actual area of the cross section, the value of the diameter obtained is an accurate value. The pores formed by the mutual staggered connection of the silk diameters are communicated with each other, the diameter sizes of the pores are inconsistent, and the diameters and the porosity ranges of the pores of the three-dimensional porous structure layer 4 are specifically set, so that the structure of the three-dimensional porous structure layer 4 can be closer to the trabecular bone structure of a human body.
In the first embodiment as shown in fig. 2 and 3, the face of the abutment prosthesis 21 away from the platform support 1 may be configured as a first plane 211, and the filling prosthesis 22 may include a vertical face 221 perpendicularly connected to the first plane 211, and a first filling arc 222 extending from an end of the vertical face 221 away from the first plane 211 to the bottom face 11 of the platform support 1, the first filling arc 222 matching the shape of the human tibia at the bone defect. Wherein the first planar surface 211 is configured to match the osteotomy plane of the human tibia to provide better support to the tibial plateau tray 100, and the first filling curved surface 222 formed by the customized machining of the filling prosthesis 22 is configured to conform to the medullary canal of the bone defect of the human tibia, such that the filling prosthesis 22 can effectively fill the bone defect. It should be noted here that, thanks to the customisation of the platform-holder connection 2, the first plane 211 can also be formed as a non-planar surface matching the osteotomy plane, and the first filling arc 222 of the filling prosthesis 22 can be configured as an arc curved away from the abutment prosthesis 21, and also as an arc curved towards the abutment prosthesis 21, just as long as it is ensured that the filling prosthesis 22 can effectively fill the bone defect of the human tibia.
In a second embodiment as shown in fig. 4, the side of the abutment prosthesis 21 away from the platform support 1 may be configured as a second plane 212, and the filling prosthesis 22 may include an inclined surface 223 connected at an angle to the second plane 212, and a second filling arc 224 extending from an end of the inclined surface 223 away from the second plane 212 to the bottom surface 11 of the platform support 1, the second filling arc 224 matching the shape of the bone defect of the human tibia. Wherein the second planar surface 212 is configured to match the osteotomy plane of the human tibia to provide better support to the tibial plateau tray 100, and the second filling curved surface 224 formed by the customized machining of the filling prosthesis 22 is configured to conform to the intramedullary canal of the bone defect of the human tibia, such that the filling prosthesis 22 can effectively fill the bone defect. It should be noted here that, thanks to the customisation of the platform-holder connection 2, the second plane 212 can also be formed as a non-plane matching the osteotomy plane, and the second filling arc 224 of the filling prosthesis 22 can be configured as an arc curved away from the abutment prosthesis 21, also curved towards the abutment prosthesis 21, just as long as it is ensured that the filling prosthesis 22 can effectively fill the bone defect of the human tibia.
In a preferred embodiment as shown in fig. 1 to 4, the platform support connection part 2 may further include an extension prosthesis 23 extending from an end of the filled prosthesis 22 remote from the abutment prosthesis 21 in a direction remote from the abutment prosthesis 21, and the extension prosthesis 23 may have a three-dimensional porous structure layer 4 formed on a surface thereof. Through the arrangement, on one hand, the formed extension prosthesis 23 not only can facilitate the tibial plateau support 100 to be implanted into a medullary cavity of a tibia of a human body, but also enables the connection between the tibial plateau support 100 and the tibia of the human body to be more stable; on the other hand, the three-dimensional porous structure layer 4 formed on the surface of the extension prosthesis 23 can better fuse the bone with the extension prosthesis 23, thereby further improving the fixing effect of the tibial plateau tray 100 connected with the human tibia.
In a preferred embodiment as shown in fig. 1, the fixture 3 may include at least two bone screws 31, the platform connecting portion 2 may include threaded holes (not shown) formed on the filling prosthesis 22 and/or the extension prosthesis 23 to be screw-coupled with the bone screws 31, and the surface of the bone screws 31 and/or the inner surface of the threaded holes may be formed with the spatial porous structure layer 4. Preferably, the platform connecting portion 2 may include threaded holes formed in the filling prosthesis 22 and the extension prosthesis 23, so that the bone nails 31 may be connected to the filling prosthesis 22 to connect the platform connecting portion 2 to the tibia, or connected to the extension prosthesis 23 to connect the platform connecting portion 2 to the tibia, or connected to the filling prosthesis 22 and the extension prosthesis 23 to connect the platform connecting portion 2 to the tibia, respectively, according to specific fixing requirements, so that the platform connecting portion 2 and the tibia may be connected more flexibly to further improve the fixing effect of the platform connecting portion 2 to the tibia. Preferably, the three-dimensional porous structure layer 4 is formed on the outer surface of the bone nail 31 and the inner surface of the threaded hole, so that, on one hand, in combination with the above, the three-dimensional porous structure layer 4 can effectively promote the fusion with the bone, and the bone can be differentiated and regenerated through the pores of the three-dimensional porous structure layer 4 at the joint of the bone nail 31 and the threaded hole, so that the joint of the bone nail 31 and the threaded hole can be fused with the bone tissue, the connection strength of the bone nail 31 and the threaded hole can be better improved, and the micromotion between the bone nail 31 and the threaded hole can be greatly reduced; on the other hand, still be favorable to increasing the frictional force on bone nail 31 and screw hole matched with surface to can effectual improvement bone nail 31 and the joint strength of screw hole, with avoiding deviating from of bone nail 31.
In a preferred embodiment, the axis of the threaded bore may be angled such that bone screw 31 is angled after being threaded into the threaded bore. Through the arrangement, on one hand, the bone nail 31 can be better matched with the arc-shaped surfaces of the first filling arc-shaped surface 222 and the second filling arc-shaped surface 224, so that the connection strength of the bone nail 31 and the threaded hole is effectively improved, and the phenomenon that the bone nail 31 is loosened and falls off is avoided; on the other hand, the angled pegs 31 can subject the augment prosthesis 22 to shear stresses in multiple directions, thereby effectively reducing the risk of micro-motion of the tibial plateau tray 100 relative to the tibia.
In a preferred embodiment, a groove (not shown) is formed on the surface of the platform support part 1 connected to the platform support connecting part 2, and the groove is filled with the three-dimensional porous structure layer 4. Preferably, the depth of the groove may range from 1.5mm to 2mm, and the thickness of the three-dimensional porous structure layer 4 filled in the groove may range from 1.5mm to 2 mm. Further preferably, the depth of the groove is the same as the thickness of the three-dimensional porous structure layer 4 filled in the groove. Through the arrangement, the tibial plateau tray 100 provided by the embodiment of the invention can be more conveniently applied to revision and replacement of the tibial plateau tray 100. Specifically, when the tibial plateau tray 100 of the embodiment of the present invention is applied to revision replacement of the tibial plateau tray 100, the platform tray connecting portion 2 may be customized, and a portion of the platform tray supporting portion 1 may be configured to have the same shape and structure as those of the existing platform tray supporting portion, and the depth of the groove is the same as the thickness of the three-dimensional porous structure layer 4 filled in the groove, so that the thickness of the three-dimensional porous structure layer 4 formed on the bottom surface 11 of the platform tray supporting portion 1 does not affect the overall thickness of the platform tray supporting portion 1, and thus the platform tray supporting portion 1 may be more matched with the structure of the platform tray supporting portion to be replaced. The formed three-dimensional porous structure layer 4 can be better fused with bone, so that the stability of the platform support supporting part 1 after replacement can be improved.
In a preferred embodiment, the three-dimensional porous structure layer 4 can be processed by laser cladding technology. The laser cladding technique is a process method that selective coating materials are placed on the bottom surface 11 of the platform support part 1, the outer surface of the abutting prosthesis 21 and the outer surface of the filling prosthesis 22, the selected coating materials are simultaneously melted with the thin layers of the surfaces of the platform support part 1, the abutting prosthesis 21 and the filling prosthesis 22 through laser irradiation, and the thin layers are rapidly solidified to form a surface coating which has extremely low dilution and is metallurgically bonded with the materials of the platform support part 1, the abutting prosthesis 21 and the filling prosthesis 22. The three-dimensional porous structure layer 4 processed by the method can effectively ensure the self-strength of the platform support part 1, the abutting prosthesis 21 and the filling prosthesis 22, so that the stability of the tibial platform support 100 of the embodiment of the invention after being implanted into a human body can be effectively ensured, and on the other hand, the selectable types of the materials of the three-dimensional porous structure layer 4 are more diversified, so that the three-dimensional porous structure layer can be matched with the affected part of the human body, and the applicability of the tibial platform support 100 of the embodiment of the invention is improved.
Preferably, the material of the three-dimensional porous structure layer 4 may be titanium alloy, pure titanium or tantalum metal, and the like. Preferably, the three-dimensional porous structure layer 4 may be made of a titanium alloy material, preferably Ti6Al 4V.
The invention also provides a knee joint prosthesis, which comprises the tibial plateau support 100. As can be seen from the above description, the knee joint prosthesis using the tibial plateau tray 100 does not need to remove the undamaged bone of the patient, and only needs to fill the bone defect of the tibia of the human body with the filling prosthesis 22 to complete the implantation of the tibial plateau tray 100, so that the healthy bone of the human body can be retained by the patient to the maximum extent, the strength of the knee joint of the patient can be effectively improved, and the postoperative motion function of the patient is better; the health bone of the human body can be kept to the maximum extent, and the phenomenon that the tibia is shortened due to excessive removed bone in the process of implanting the prosthesis can be avoided, so that the problems that the affected side of a patient is obviously shortened compared with the healthy side, the function is limited and the like can be effectively avoided; in addition, the tibial plateau support 100 of the embodiment of the present invention is fixedly connected to the tibia of the human body by the fixing member 3, and the three-dimensional porous structure layer 4 is formed on the bottom surface 11 of the plateau support portion 1, the outer surface of the abutment prosthesis 21, and the outer surface of the filler prosthesis 22, so that the stability of the tibial plateau support 100 after being implanted is directly improved.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A tibial plateau tray, comprising:
a platform support portion for connection with a pad of a knee prosthesis;
the platform support connecting part is formed at the bottom of the platform support supporting part and is used for being implanted into a medullary cavity of a human tibia so as to be connected with the human tibia, the platform support connecting part comprises an abutting prosthesis which is connected with the bottom surface of the platform support supporting part and is used for abutting against a osteotomy surface of the human tibia, and a filling prosthesis which is connected with the abutting prosthesis and extends along the direction far away from the platform support supporting part, and the filling prosthesis is used for filling a bone defect part of the human tibia;
at least one fixing part, the fixing part is used for penetrating the tibia of the human body and being connected with the filling prosthesis so as to fix the filling prosthesis on the tibia of the human body.
2. The tibial plateau tray of claim 1 further comprising a solid porous structural layer formed on a bottom surface of the plateau tray support and/or on an outer surface of the abutment prosthesis and/or on an outer surface of the filler prosthesis.
3. The tibial plateau of claim 2 wherein a face of the abutment prosthesis distal from the plateau support portion is configured as a first plane, the filling prosthesis including a vertical face connected perpendicular to the first plane and a first filling contour extending from an end of the vertical face distal from the first plane to a bottom surface of the plateau support portion, the first filling contour matching a shape of a bone defect of a human tibia.
4. The tibial plateau of claim 2 wherein a face of the abutment prosthesis distal from the plateau support portion is configured as a second plane, the filling prosthesis including an inclined surface connected at an included angle to the second plane and a second filling contour extending from an end of the inclined surface distal from the second plane to a bottom surface of the plateau support portion, the second filling contour matching a shape of a bone defect of a human tibia.
5. A tibial plateau tray according to claim 3 or 4 wherein the tray connecting portion further includes an elongate prosthesis extending from an end of the filling prosthesis remote from the abutting prosthesis in a direction remote from the abutting prosthesis, the elongate prosthesis having the layer of solid porous structure formed on a surface thereof.
6. The tibial plateau tray of claim 5 wherein the fixture includes at least two bone pegs, the plateau connecting portion including threaded holes formed in the filling prosthesis and/or the extension prosthesis to be in threaded connection with the bone pegs, the bone pegs having the three-dimensional porous structure layer formed on a surface thereof and/or an inner surface thereof.
7. The tibial plateau tray of claim 6 wherein the axis of the threaded hole is angled.
8. A tibial plateau tray according to any one of claims 1 to 4 wherein a recess is formed in the side of the tray support portion that is connected to the tray connection portion, the recess being filled with a layer of three-dimensional porous structure.
9. The tibial plateau tray of claim 8 wherein said three-dimensional porous structural layer is machined by laser cladding techniques.
10. A knee prosthesis comprising a tibial plateau tray according to any one of claims 1 to 9.
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| CN201911173597.9A CN110840630A (en) | 2019-11-26 | 2019-11-26 | Tibial plateau holds in palm and uses its knee joint prosthesis |
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| CN201911173597.9A CN110840630A (en) | 2019-11-26 | 2019-11-26 | Tibial plateau holds in palm and uses its knee joint prosthesis |
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| CN110840630A true CN110840630A (en) | 2020-02-28 |
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| CN111839816A (en) * | 2020-08-24 | 2020-10-30 | 姚舒馨 | Tibia defect patch suit and using method thereof |
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