CN112220592A - Biological single-compartment knee joint mechanical pressurization tibial platform - Google Patents
Biological single-compartment knee joint mechanical pressurization tibial platform Download PDFInfo
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- CN112220592A CN112220592A CN202011223645.3A CN202011223645A CN112220592A CN 112220592 A CN112220592 A CN 112220592A CN 202011223645 A CN202011223645 A CN 202011223645A CN 112220592 A CN112220592 A CN 112220592A
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- 210000000629 knee joint Anatomy 0.000 title claims abstract description 19
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- 238000010146 3D printing Methods 0.000 claims description 3
- 230000007774 longterm Effects 0.000 abstract description 14
- 210000002303 tibia Anatomy 0.000 abstract description 11
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- 210000003127 knee 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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- 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
- A61F2/50—Prostheses not implantable in the body
- A61F2/60—Artificial legs or feet or parts thereof
- A61F2/64—Knee joints
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30383—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
- A61F2002/3039—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove with possibility of relative movement of the rib within the groove
- A61F2002/30398—Sliding
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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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30841—Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
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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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
- A61F2002/30884—Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity
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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
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
- A61F2002/30891—Plurality of protrusions
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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
- A61F2002/3895—Joints for elbows or knees unicompartimental
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Transplantation (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (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)
- Physical Education & Sports Medicine (AREA)
- Prostheses (AREA)
Abstract
The invention relates to the field of design of medical instruments, in particular to a biological single-compartment knee joint mechanical pressurization tibial platform which comprises a tibial platform and a pressurization fixed connecting piece, wherein a connecting channel is arranged on the lower surface of the tibial platform, the pressurization fixed connecting piece is inserted in the connecting channel and comprises a guide rail, a bracket and a blade, the guide rail is fixedly arranged above the bracket, the blade is fixedly arranged below the bracket, the guide rail is inserted in the connecting channel, and the front end of the blade is obliquely arranged downwards to form a divergence angle with the guide rail. The tibial plateau and the pressurizing fixed connecting piece are combined for use, the tibial plateau is stably fixed on the tibia through mechanical pressurization, the problem that the initial stability of the existing biological single-compartment knee joint tibial plateau is poor is solved, meanwhile, the tibial plateau cannot be loosened under the action of eccentric load through the auxiliary action of the positioning column, and the initial and long-term stability is further enhanced.
Description
Technical Field
The invention relates to the field of design of medical instruments, in particular to a biological single-compartment knee joint mechanical pressurization tibial platform.
Background
Some patients have damaged or diseased portions of the knee joint and require replacement of only the damaged or diseased unilateral knee joint. Currently, the fixation of unicondylar prostheses can be divided into cement fixation and biological fixation. The bone cement has the advantages of reliable effect, particularly, the bone cement monomer is polymerized, expanded and permeated into the trabecula bone at the initial stage, so that the cancellous bone can be reinforced, the stress conduction range is further expanded, and the tolerance to the technical deviation of doctors and the bone is improved. However, bone cement is an inert material for human body, and it can only form mechanical bond with bone tissue or joint prosthesis, which inevitably faces the problems of aging, cracking and abrasion particles, and affects the success rate of operation and long-term stability of prosthesis.
The advantages of biological fixation are that the use of biological fixation shortens the operation time, preserves more bone mass and can provide long-term biological fixation, increasing the long-term survival rate of the prosthesis, but for biological fixation, whether firm initial stability can be obtained is an important factor affecting later bone ingrowth and long-term stability.
At present, the biological type single condyle tibial plateau prosthesis mainly adopts a fixing mode of interference press fit to fix the artificial tibial plateau on the tibia, and certain initial stability is obtained. However, the existing biological tibial plateau prosthesis is easy to loosen under walking load, and complications such as tibial plateau sinking or tilting often occur, so that the initial stability of the tibial plateau is insufficient, and the reasons are that the tibial plateau cannot realize effective strong fixation or transverse shearing force generated by eccentric load causes micromotion or displacement between the prosthesis and a bone interface; in addition, the improper setting of the press fit amount of the interference press fit can cause fracture of the tibial plateau;
the traditional biological fixation is realized by utilizing a coating on the surface of a substrate of a knee joint component, the coating is formed in the later stage of a plasma spraying or metal sintering process, and the defect that the strength of a bonding layer between the coating and the substrate is low, so that the coating can fall off from the substrate sometimes, and the service life of the knee joint is influenced. In addition, the parameters of the traditional coating such as aperture, porosity and thickness cannot be accurately controlled, and the combination of the coating and the bone cannot be optimized.
Biological fixation can also be realized by printing a porous structure on the surface of the prosthesis in a 3D manner, after the tibial plateau prosthesis is implanted, through the self-growth of human bones, the bones and the prosthesis form an interlocking interface, and finally, the strong fixation is achieved. And because the human skeleton is a living body and can grow by itself, the human skeleton can not be worn and loosened due to long-term use.
Although achieving long-term stability by bio-bonding to bone through the use of coatings, 3D printed porous structures or other treatments on the surface of the prosthesis is successful, there is still a need for preliminary fixation and stabilization treatments before bone growth occurs. A simple way of mechanically fixing a prosthesis is to fix the prosthesis in the bone, using screws or other mechanical fasteners or mechanical compression fixtures. Since the use of screws (chinese patent tibial knee unicondylar implant with publication number CN 105392450 a) or other mechanical fasteners penetrating the tibial plateau prosthesis causes accelerated wear of the liner, thereby reducing the long-term survival rate of the prosthesis, it is considered to use a mechanical compression fixation method to fix the tibial plateau to the bone. The mechanical compression fixing piece can be used by combining a tibial platform and a compression fixing connecting piece, the compression fixing connecting piece is implanted into a tibial bone and is wedge-shaped, the angle of the wedge-shaped angle is set according to the height of bone density and the length of the compression fixing connecting piece, in the process of connecting and fixing a prosthesis and the tibial bone, the tibial platform generates downward pressure, meanwhile, the compression fixing connecting piece is provided with an anti-falling structure, and the tibial platform and the compression fixing connecting piece jointly act to realize initial stability.
In order to solve the technical problems, the invention strengthens the firm combination of the prosthesis and the bone tissues by improving the fixed connection design of the tibial plateau, and has important significance for enhancing the initial stability of the biological knee joint prosthesis, promoting the later bone growth and improving the long-term stability of the prosthesis.
Disclosure of Invention
The invention aims to solve the technical problem of providing a biological single-compartment knee joint mechanical pressurization tibial plateau which is simple in structure and convenient to manufacture and can solve the problem of poor initial stability of a tibial plateau prosthesis.
The invention is realized by the following technical scheme:
a biological single-compartment knee joint mechanical pressurization tibial plateau comprises a tibial plateau and a pressurization fixed connecting piece, wherein a connecting channel is arranged on the lower surface of the tibial plateau, the pressurization fixed connecting piece is inserted in the connecting channel and comprises a guide rail, a support and a blade, the guide rail is fixedly arranged above the support, the blade is fixedly arranged below the support, the guide rail is inserted in the connecting channel, and the front end of the blade is arranged in a downward inclined mode to form a divergence angle with the guide rail.
Furthermore, the tail of the guide rail is fixedly provided with a stop block and two limiting columns, two sides of the middle of the guide rail are fixedly provided with wing-shaped buckles, and the connecting channel is provided with two limiting grooves matched with the limiting columns and buckle grooves matched with the wing-shaped buckles.
Preferably, the support comprises solid support portions and support porous portions disposed between the support solid portions.
Furthermore, two sides of the blade are provided with symmetrical inclined planes, inverted blade sawteeth are arranged on the inclined planes, and a sharp corner formed by two sections of circular arcs is fixedly arranged at the front end of the blade.
Preferably, the bottom surface of the blade is provided with a long slotted hole, and the tail part of the blade is provided with a groove.
Furthermore, the support porous part is provided with a square hole.
Preferably, the tibial platform comprises a platform solid part and a platform porous part, the platform solid part is a smooth plane, and the platform porous part is fixedly arranged on the lower surface of the platform solid part and covers the outer part of the connecting channel.
Furthermore, the lower surface of the platform solid part is fixedly provided with two positioning columns which are respectively positioned at two sides of the pressurizing fixed connecting piece.
Furthermore, every the reference column includes a center cylinder, solid fixed ring around in a plurality of edges and the circular cone tail end of center cylinder periphery, be equipped with a plurality of edge sawteeth of invering on the edge, circular cone tail end is frame rack construction and upper end and sawtooth edge fixed connection.
Optimized, the tibia platform and the positioning column are printed in a 3D mode to form a whole, and the pressurizing fixed connecting piece is printed in a 3D mode to form a whole.
The invention has the advantages of
A biological unicompartmental knee joint mechanical compression tibial plateau has the following advantages:
(1) the initial stability can be realized by the mechanical pressurization effect generated by the combined use of the tibial plateau prosthesis and the pressurization fixed connecting piece, a divergence angle is arranged between the pressurization fixed connecting piece guide rail and the blade and is implanted into a tibial bone, and in the process of connecting and fixing the tibial prosthesis and the tibial bone, the tibial plateau generates downward pressure on the tibia under the action of the pulling force of the pressurization fixed connecting piece, so that the tibial plateau can be fully contacted with bone tissues.
Meanwhile, the pressurizing fixed connecting piece is provided with inverted blade sawteeth, so that the pressurizing fixed connecting piece is prevented from backing up, and the initial stability is realized under the combined action of the tibial plateau and the pressurizing fixed connecting piece.
(2) The long-term stability can be realized by 3D printing of a porous structure on the surface of the prosthesis, after the tibial plateau prosthesis is implanted, through the self-growth of human bones, the bones and the prosthesis form an interlocking interface, and finally, the rigid fixation is achieved. And because the human skeleton is a living body, the human skeleton can grow by itself, so the human skeleton can not be worn and loosened due to long-term use, and has simple structure and convenient manufacture.
(3) The supplementary tibial plateau of reference column plays fixed effect, and edge pawl on the reference column plays fixed effect, prevents tibial plateau's fine motion or displacement, and the central cylinder of reference column, a plurality of edge and the circular cone tail end form porous structure, can realize that faster bone grows into, improves tibial plateau's stability.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic bottom view of the present invention;
FIG. 4 is a side view of the compression fixation connector;
FIG. 5 is a schematic top view of the compression fixation connector;
FIG. 6 is a schematic bottom view of the compression fixation connector;
FIG. 7 is a front view of the fixed connection;
FIG. 8 is a schematic front view of the present invention;
FIG. 9 is a schematic view of a connecting channel structure;
in the figure, 1 part of a tibial platform, 1-1 part of a platform solid part, 1-2 parts of a platform porous part, 2 parts of a connecting channel, 2-1 parts of a limiting groove, 2-2 parts of a clamping groove, 3 parts of a pressurizing fixing connecting piece, 3-1 parts of a guide rail, 3-2 parts of a bracket, 3-3 parts of a sharp corner, 3-4 parts of a blade sawtooth, 3-5 parts of a blade, 3-6 parts of a supporting porous part, 3-7 parts of a square hole, 3-8 parts of a limiting column, 3-9 parts of a solid supporting part, 3-10 parts of a wing-shaped clamping buckle, 3-11 parts of a groove, 3-12 parts of a stop block, 3-13 parts of a long slotted hole, 4 parts of a positioning column, 4-1 parts of a central cylinder, 4-2 parts of a cone tail end, 4-3 parts of an edge.
Detailed Description
A biological single-compartment knee joint mechanical pressurization tibial platform comprises a tibial platform 1 and a pressurization fixed connecting piece 3, wherein a connecting channel 2 is arranged on the lower surface of the tibial platform, the pressurization fixed connecting piece is inserted in the connecting channel and comprises a guide rail 3-1, a bracket 3-2 and a blade 3-5, the guide rail is fixedly arranged above the bracket, the blade is fixedly arranged below the bracket, the guide rail is inserted in the connecting channel, and the front end of the blade is arranged in a downward inclined mode to form a divergence angle with the guide rail. Through the combined use of the tibial plateau prosthesis and the pressurizing fixing connecting element, the front end of the blade is arranged in a downward inclined mode and forms a divergence angle with the guide rail, after the tibial plateau prosthesis is implanted, the tibial plateau generates downward pressure on the tibia under the action of the pulling force of the pressurizing fixing connecting element, the tibial plateau prosthesis is fully contacted with bone tissues, an interlocking interface is formed, the bone tissues grow into the tibial plateau prosthesis more easily, and finally strong fixation is achieved.
The pressurizing fixed connecting piece and the connecting channel can be provided with one or a plurality of pressurizing fixed connecting pieces and connecting channels, and the cross section shapes of the channels can be different geometric shapes, such as T-shaped grooves or dovetail grooves. The number of the brackets can also be multiple according to the requirement, and the connecting channel can either completely penetrate through the tibial plateau body or terminate in the tibial plateau.
Furthermore, the lower end face of the tail of the guide rail is fixedly provided with a stop block 3-12, the upper end face of the tail of the guide rail is fixedly provided with two limiting columns 3-8, two sides of the middle of the guide rail are fixedly provided with wing-shaped buckles 3-10, the connecting channel is provided with two limiting grooves 2-1 matched with the limiting columns and buckle grooves 2-2 matched with the wing-shaped buckles, the stop block can limit the guide rail from excessively penetrating into the connecting channel, the limiting columns are matched with the limiting grooves and the wing-shaped buckles are matched with the buckle grooves, the guide rail can be limited from freely moving in the connecting channel, and the connection between the tibial platform and the pressurizing fixed connecting piece is stable and reliable.
Optimally, the bracket comprises solid supporting parts 3-9 and supporting porous parts 3-6 arranged between the supporting solid parts, so that the rapid bone ingrowth can be realized, and the long-term stability of the tibial plateau is ensured.
Furthermore, symmetrical inclined planes are arranged on two sides of the blade, inverted blade sawteeth 3-4 are arranged on the inclined planes, a sharp angle 3-3 consisting of two sections of circular arcs is fixed at the front end of the blade, the sharp angle consisting of two sections of circular arcs is arranged at the front end of the blade, so that a guide rail can enter a tibial plateau channel more smoothly, and the inverted blade sawteeth can prevent a pressurizing fixing connecting piece from backing up.
Preferably, the bottom surface of the blade is provided with a long slotted hole 3-13, the tail part of the blade is provided with a groove 3-11, the supporting porous part inside the blade can be conveniently observed through the long slotted hole, and the arrangement of the groove is convenient for being connected and fixed with a propelling tool of a pressurizing fixed connecting piece.
Furthermore, the support porous part is provided with square holes 3-7, which is more beneficial to the bone growth in the later period.
Preferably, the tibial platform comprises a platform solid part 1-1 and a platform porous part 1-2, the platform solid part is a smooth plane, the platform porous part is fixedly arranged on the lower surface of the platform solid part and covers the outside of the connecting channel, the tibial platform prosthesis is implanted, the bone and the prosthesis form an interlocking interface through the self-growth of human bone, and finally the rigid fixation is achieved. And because the human skeleton is a living body and can grow by itself, the human skeleton can not be worn and loosened due to long-term use.
Furthermore, the lower surface of the platform entity part is fixedly provided with two positioning columns 4 which are respectively positioned at two sides of the pressurizing fixed connecting piece, the design of the two positioning columns can eliminate micro-motion or displacement generated between the prosthesis and the bone interface caused by transverse shearing force generated by eccentric load when a person moves, and the positioning columns can be not vertically arranged with the lower surface of the platform entity part to form a certain inclination angle.
Furthermore, each positioning column comprises a central cylinder 4-1, a plurality of edges 4-3 and a conical tail end 4-2, wherein the fixing rings are wound on the periphery of the central cylinder, a plurality of inverted edge sawteeth 4-4 are arranged on the edges, the conical tail end is of a frame structure, the upper end of the conical tail end is fixedly connected with the sawteeth edges, when a tibial platform prosthesis is implanted, the positioning column extends into the inner cavity of a tibia to play a role in fixing the tibial platform, and even if a large external force is applied in the subsequent process of implanting a combined part of the tibial platform, namely a pressurizing fixed connecting part, the tibial platform cannot loosen due to the fixing effect of the inverted teeth, so that the positioning column is used for assisting the pressurizing fixed connecting part to fix the tibial platform, and the initial stability of the tibial platform. The design of pawl is in order to bear certain exogenic action in the channel of pressurization fixed connection spare when putting into tibial plateau, and nevertheless the tibial plateau still can firmly be fixed not hard up under the fixed action of pawl, and the porous design of reference column is favorable to faster bone to grow into.
Optimized, tibial plateau prints integrated into one piece with reference column 3D, pressurization fixed connection spare 3D prints integrated into one piece, both made things convenient for processing, keeps whole steadiness again, and does benefit to initial stage and later stage stability.
When the biological single-compartment knee joint mechanical pressurization tibial plateau is implanted, firstly, a special osteotomy operation tool is used for osteotomy treatment of a damaged articular surface of a tibia, and holes needed by two positioning columns are drilled on an osteotomy plane by using a special guide tool and a drill bit, so that the section of the tibial plateau is well prepared. Implanting the tibial plateau prosthesis into the tibia, so that the positioning column completely enters the inner cavity of the tibia; the special osteotomy tool is fixed on the tibial plateau prosthesis, an I-shaped channel is cut on the tibia for implanting the pressurizing and fixing connecting piece, the pressurizing and fixing connecting piece is driven to penetrate into the channel of the tibial plateau by the special tool, and finally the tibial plateau and the pressurizing and fixing connecting piece are combined together. The tibial plateau is used with the pressurization fixed connection spare combination, solves the difficult problem of current biotype list room knee joint tibial plateau initial stability poor through the auxiliary action of reference column simultaneously.
In summary, the mechanical compression tibial plateau of the biological single-compartment knee joint, which is protected by the invention, is combined with the compression fixing connecting piece for use, and the tibial plateau is stably fixed on the tibia through mechanical compression, so that the problem of poor initial stability of the existing biological single-compartment knee joint tibial plateau is solved, and meanwhile, the tibial plateau can not be loosened under the action of eccentric load through the auxiliary action of the positioning column, so that the initial and long-term stability is further enhanced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The biological single-compartment knee joint mechanical pressurization tibial plateau is characterized by comprising a tibial plateau and a pressurization fixed connecting piece, wherein a connecting channel is arranged on the lower surface of the tibial plateau, the pressurization fixed connecting piece is inserted in the connecting channel and comprises a guide rail, a support and a blade, the guide rail is fixedly arranged above the support, the blade is fixedly arranged below the support, the guide rail is inserted in the connecting channel, and the front end of the blade is arranged in a downward inclined mode to form a divergence angle with the guide rail.
2. The mechanical compression tibial plateau of claim 1, wherein the guide rail has a stop block and two limiting posts fixed to the tail portion of the guide rail, wing-shaped fasteners fixed to two sides of the middle portion of the guide rail, and two limiting grooves and two fastening grooves matched with the wing-shaped fasteners.
3. The mechanical compression tibial plateau of claim 2, wherein said tray comprises solid support portions and support porous portions disposed between said solid support portions.
4. The mechanical compression tibial plateau of claim 3, wherein the blade has symmetrical inclined planes on both sides and inverted blade teeth on the inclined planes, and the front end of the blade is fixed with a sharp corner formed by two circular arcs.
5. The mechanical compression tibial plateau of claim 4, wherein the bottom surface of the blade has a slotted hole, and the tail of the blade has a groove.
6. The mechanical compression tibial plateau of claim 3, wherein said support porous portion has a square hole.
7. The mechanical compression tibial plateau of claim 1, wherein the tibial plateau comprises a plateau solid portion and a plateau porous portion, the plateau solid portion is a smooth plane, and the plateau porous portion is fixedly disposed on a lower surface of the plateau solid portion and covers an outer portion of the connecting channel.
8. The mechanical compression tibial plateau of claim 7, wherein two positioning posts are fixed to the lower surface of the solid portion of the plateau, and the two positioning posts are respectively located on two sides of the compression fixation connector.
9. The mechanical compression tibial plateau of claim 8, wherein each of the positioning pillars comprises a central cylinder, a plurality of rims surrounding the periphery of the central cylinder by the fixing ring, and a conical tail, the rims having a plurality of inverted rim serrations thereon, the conical tail having a frame-like structure and an upper end fixedly connected to the serration rims.
10. The mechanical compression tibial plateau of claim 9, wherein said tibial plateau is integrally formed with said positioning post by 3D printing, and said compression fixation connector is integrally formed by 3D printing.
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| CN202011223645.3A CN112220592A (en) | 2020-11-05 | 2020-11-05 | Biological single-compartment knee joint mechanical pressurization tibial platform |
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| CN202011223645.3A CN112220592A (en) | 2020-11-05 | 2020-11-05 | Biological single-compartment knee joint mechanical pressurization tibial platform |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113367854A (en) * | 2021-05-24 | 2021-09-10 | 北京纳通医疗科技控股有限公司 | Tibial tray prosthesis and knee joint prosthesis |
| WO2023215441A1 (en) * | 2022-05-06 | 2023-11-09 | Smith & Nephew, Inc. | Knee arthroplasty instruments and techniques |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120191204A1 (en) * | 2010-12-16 | 2012-07-26 | Hyun Bae | Arthroplasty systems and methods |
| CN203852452U (en) * | 2014-05-23 | 2014-10-01 | 北京威高亚华人工关节开发有限公司 | Stable pad type arthroplasty knee joint |
| US20180250143A1 (en) * | 2017-03-03 | 2018-09-06 | Engage Uni Llc | Unicompartmental knee arthroplasty |
| CN109966030A (en) * | 2019-03-08 | 2019-07-05 | 山东新华联合骨科器材股份有限公司 | Single condyle artificial knee joint prosthesis system based on 3D printing |
| CN111345921A (en) * | 2020-03-09 | 2020-06-30 | 嘉思特华剑医疗器材(天津)有限公司 | Unicompartmental knee joint prosthesis and manufacturing method thereof |
| CN111839825A (en) * | 2020-09-07 | 2020-10-30 | 北京爱康宜诚医疗器材有限公司 | Knee joint prosthesis |
| CN214285317U (en) * | 2020-11-05 | 2021-09-28 | 嘉思特华剑医疗器材(天津)有限公司 | Biological single-compartment knee joint mechanical pressurization tibial platform |
-
2020
- 2020-11-05 CN CN202011223645.3A patent/CN112220592A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120191204A1 (en) * | 2010-12-16 | 2012-07-26 | Hyun Bae | Arthroplasty systems and methods |
| CN203852452U (en) * | 2014-05-23 | 2014-10-01 | 北京威高亚华人工关节开发有限公司 | Stable pad type arthroplasty knee joint |
| US20180250143A1 (en) * | 2017-03-03 | 2018-09-06 | Engage Uni Llc | Unicompartmental knee arthroplasty |
| CN109966030A (en) * | 2019-03-08 | 2019-07-05 | 山东新华联合骨科器材股份有限公司 | Single condyle artificial knee joint prosthesis system based on 3D printing |
| CN111345921A (en) * | 2020-03-09 | 2020-06-30 | 嘉思特华剑医疗器材(天津)有限公司 | Unicompartmental knee joint prosthesis and manufacturing method thereof |
| CN111839825A (en) * | 2020-09-07 | 2020-10-30 | 北京爱康宜诚医疗器材有限公司 | Knee joint prosthesis |
| CN214285317U (en) * | 2020-11-05 | 2021-09-28 | 嘉思特华剑医疗器材(天津)有限公司 | Biological single-compartment knee joint mechanical pressurization tibial platform |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113367854A (en) * | 2021-05-24 | 2021-09-10 | 北京纳通医疗科技控股有限公司 | Tibial tray prosthesis and knee joint prosthesis |
| CN113367854B (en) * | 2021-05-24 | 2023-08-01 | 北京纳通医疗科技控股有限公司 | Tibial tray prosthesis and knee joint prosthesis |
| WO2023215441A1 (en) * | 2022-05-06 | 2023-11-09 | Smith & Nephew, Inc. | Knee arthroplasty instruments and techniques |
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