CN109925099B - Biological knee joint mechanical locking structure tibia platform - Google Patents
Biological knee joint mechanical locking structure tibia platform Download PDFInfo
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- CN109925099B CN109925099B CN201910308189.3A CN201910308189A CN109925099B CN 109925099 B CN109925099 B CN 109925099B CN 201910308189 A CN201910308189 A CN 201910308189A CN 109925099 B CN109925099 B CN 109925099B
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Abstract
The invention discloses a biological knee joint mechanical locking structure tibia platform which comprises a kidney-shaped platform support, wherein a dovetail-shaped lug is arranged on the upper surface of an inward bending part of the kidney-shaped platform support, an arc-shaped lug is arranged on the upper surface of an outward bending part of the kidney-shaped platform support, a hole is arranged in the middle of the kidney-shaped platform support, the lower surface of the kidney-shaped platform support is connected with a handle, a ring plate with internal threads is arranged on the wall of the middle upper part of the handle, two symmetrical vertical holes are arranged on the wall of the middle lower part of the handle, and two round holes are respectively arranged on two sides of each vertical hole; the puncturing device comprises: the device comprises an ejector rod, a small screw, a connecting sleeve and a penetrating claw; according to the tibia platform, a coordinated working mechanism of mechanical pressurization and hole shaft matching is adopted, so that the penetrating claw is embedded into cancellous bone and cortical bone of tibia, the tibia platform is stably fixed on the tibia, the tibia platform is not loosened under the action of load, and the problem of poor initial stability of the existing biological knee joint tibia platform is solved. The tibia platform is beneficial to later-stage revision of the tibia platform.
Description
Technical Field
The invention belongs to the technical field of medical equipment, and particularly relates to a biological knee joint mechanical locking structure tibia platform.
Background
The knee joint replacement operation can effectively solve the knee joint diseases of patients, relieve the pain of the patients and recover the knee joint functions of the patients to a certain extent. The knee prosthesis structure comprises: the femoral condyle, the tibial plateau pad, the patella and the accessory. With the rapid development of medical instrument technology and the continuous improvement of the safety and effectiveness requirements of people on knee joint prostheses, the knee joint prosthesis technology is more mature and perfect, and different kinds of knee joint prostheses appear successively.
Currently, knee prostheses are classified into two major categories, bone cement fixation type and biosolid type (non-bone cement type) according to different fixation modes. Among them, the bone cement-fixed knee prosthesis is called "gold standard" of Total Knee Arthroplasty (TKA), and is widely used in clinic. The bone cement monomer is polymerized, expanded and permeated into trabecula, so that cancellous bone can be reinforced, and the stress conduction range is enlarged, thereby improving the tolerance to technical deviation and bone of doctors. However, bone cement is an inert material for the human body, which forms only a mechanical bond with bone tissue or joint prostheses, which inevitably faces problems of aging, chipping, and wear particles. Clinical practice shows that a series of complications of the bone cement type knee joint prosthesis, such as Bone Cement Implantation Syndrome (BCIS), tissue injury around the prosthesis caused by heat release of bone cement polymerization, postoperative local infection, sensory or functional disorder of the affected part, early loosening of the prosthesis and the like, affect the success rate of the operation and the long-term stability of the prosthesis.
The biological knee joint prosthesis achieves the aim of biological fixation through direct bone ingrowth of bone and prosthesis, overcomes the defect of mechanical combination of bone cement type prosthesis, promotes the integration of the prosthesis and bone tissue, improves the long-term stability of the prosthesis, is more convenient for later repair, and has wide application prospect. For biological knee prostheses, whether firm initial stability is achieved is an important factor affecting bone ingrowth and long term stability thereafter. At present, the biological knee joint prosthesis mainly adopts an interference press fit fixing mode to fix the artificial tibia platform on the tibia, so as to obtain certain initial stability. However, existing biological knee joint prostheses are prone to loosening under walking loads, complications such as sinking or warping of the tibial plateau often occur, and the initial stability of the tibial plateau is insufficient due to the fact that the tibial plateau cannot achieve effective firm fixation or lateral shearing force generated by eccentric load causes micro-motion or displacement between the prosthesis and the bone interface. Therefore, the method has important significance for enhancing the initial stability of the biological knee joint prosthesis, promoting the later bone ingrowth and improving the long-term stability of the prosthesis by perfecting the fixing design of the biological knee joint tibial plateau and enhancing the firm combination of the joint prosthesis and the tibial tissue.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a biological knee joint mechanical locking structure tibial plateau.
The technical scheme of the invention is summarized as follows:
the biological knee joint mechanical locking structure tibia platform comprises a kidney-shaped platform support 1, wherein a dovetail-shaped lug 3 is arranged on the upper surface of an inward bending part of the kidney-shaped platform support, rear grooves 5 are formed on the outer side surfaces of two oblique branches of the dovetail-shaped lug, an arc-shaped lug 2 is arranged on the upper surface of the kidney-shaped platform support and an outward bending part relative to the dovetail-shaped lug, an upper fixing hole 7 and a lower fixing hole 8 are formed on the outer side surface of the arc-shaped lug from top to bottom, and a front groove 6 is formed on the inner side surface of the arc-shaped lug 2; a hole 10 is formed in the middle of the kidney-shaped platform support, the lower surface of the kidney-shaped platform support is connected with a handle 4, and the handle 4 is a reducer pipe with a smaller lower part and a thicker upper part; the lower surface of the kidney-shaped platform support is connected with the outer surface of the handle 4 through a support plate 11, and a hole 10 is communicated with the interior of the handle 4; the inner wall of the middle upper part of the handle 4 is provided with a ring plate 19 with internal threads, the middle lower part of the handle 4 is provided with two symmetrical vertical holes 9, and two circular holes 16 are respectively arranged on two sides of each vertical hole 9; the puncturing device comprises: a mandril 12, a small screw 17, a connecting sleeve 20 and a penetrating claw 13; the top of the ejector rod 12 is connected with a nut 22, the middle upper part of the ejector rod is provided with external threads, the lower part of the ejector rod is arranged smoothly, the outer diameter of the lower part of the ejector rod is smaller than the outer diameters of the middle and upper parts of the ejector rod, and the bottom of the ejector rod is upwards provided with a hole 18 with internal threads; the connecting sleeve 20 comprises a cylindrical body, an upward groove 25 is formed in the lower surface of the cylindrical body, a middle hole 23 is formed in the top of the cylindrical body, the middle hole 23 is communicated with the upward groove 25, and 4 small holes 24 perpendicular to the long axis direction of the groove are formed in the cylindrical body; the penetrating claw 13 comprises a penetrating claw body consisting of a triangular prism, a cuboid and a semi-cylinder, wherein a lug with a long hole 27 is arranged on the lower surface of one surface of the triangular prism, and one end of the penetrating claw body is provided with a shaft hole 26; the external thread at the middle upper part of the ejector rod is in threaded connection with the ring plate 19 with the internal thread; the lower part of the ejector rod is arranged in a middle hole 23 of the connecting sleeve 20, and the connecting sleeve is connected with a hole 18 with internal threads of the ejector rod through a small screw 17; the first shaft 21 connects the penetrating claw 13 with the connecting sleeve 20 through the shaft hole 26 and the small hole 24; the second shaft 15 passes through the round hole 16, the long hole 27 and the round hole 16 in sequence, so that the penetrating claw 13 is connected with the handle 4; the lower end of the handle 4 is in interference connection with the plug 14.
The invention has the advantages that:
1. the biological knee joint mechanical locking structure tibia platform can be prepared by machining, has high precision and is beneficial to operation.
2. According to the tibia platform, a coordinated working mechanism of mechanical pressurization and hole shaft matching is adopted, so that the penetrating claw is embedded into cancellous bone and cortical bone of tibia, the tibia platform is stably fixed on the tibia, and the tibia platform cannot loosen under the action of load, so that the problem of insufficient initial stability of the existing biological knee joint tibia platform is solved.
3. After the ejector rod is screwed out in the repairing process of the tibial plateau, the penetrating claw can automatically return to the vertical hole in the process of pulling out the tibial plateau, so that the tibial plateau is smoothly pulled out, and the post repairing of the tibial plateau is facilitated.
4. The plug prevents tibial plateau pad debris from falling into the tibia.
Drawings
FIG. 1 is a schematic perspective view of a tibial plateau of a mechanical locking mechanism for a biological knee joint;
FIG. 2 is a front-to-back radial cross-sectional view of a tibial plateau of a biological knee mechanical locking structure;
FIG. 3 is an isometric view of a tibial plateau (without the puncturing device) of a biological knee mechanical locking structure;
FIG. 4 is a cross-sectional view of the push rod and the small screw through the center line;
fig. 5 is a schematic perspective view of a connecting sleeve;
FIG. 6 is a schematic perspective view of a lancing device;
fig. 7 is a schematic perspective view of the penetration pawl.
Detailed Description
The invention will be further described with reference to the accompanying drawings
The utility model provides a biological knee joint mechanical locking structure shin bone platform, including kidney shape platform support 1, be provided with dovetailed protruding block 3 in kidney shape platform support internal bend department's upper surface, be provided with back recess 5 in the lateral surface of two slant branches of dovetailed protruding block, be provided with arc protruding block 2 in kidney shape platform support and the upper surface of external bend department relative to dovetailed protruding block, be provided with upper fixed orifices 7 and lower fixed orifices 8 from top to bottom in the lateral surface of arc protruding block, be provided with anterior recess 6 in the medial surface of arc protruding block 2 (anterior recess 6 and back recess 5 can fix shin bone platform pad on shin bone platform); the middle part of the kidney-shaped platform support is provided with a hole 10, the lower surface of the kidney-shaped platform support is connected with a handle 4, and the handle 4 is a lower thin upper thick reducer (the lower thin upper thick reducer is beneficial to smoothly installing the tibia platform on the tibia in the operation process); the lower surface of the kidney-shaped platform support is connected with the outer surface of the handle 4 through a support plate 11, and a hole 10 is communicated with the interior of the handle 4; the inner wall of the middle upper part of the handle 4 is provided with a ring plate 19 with internal threads, the middle lower part of the handle 4 is provided with two symmetrical vertical holes 9, and two circular holes 16 are respectively arranged on two sides of each vertical hole 9; the puncturing device comprises: a mandril 12, a small screw 17, a connecting sleeve 20 and a penetrating claw 13; the top of the ejector rod 12 is connected with a nut 22, the middle upper part of the ejector rod is provided with external threads, the lower part of the ejector rod is arranged smoothly, the outer diameter of the lower part of the ejector rod is smaller than the outer diameters of the middle and upper parts of the ejector rod, and the bottom of the ejector rod is upwards provided with a hole 18 with internal threads; the connecting sleeve 20 comprises a cylindrical body, an upward groove 25 is formed in the lower surface of the cylindrical body, a middle hole 23 is formed in the top of the cylindrical body, the middle hole 23 is communicated with the upward groove 25, and 4 small holes 24 perpendicular to the long axis direction of the groove are formed in the cylindrical body; the penetrating claw 13 comprises a penetrating claw body consisting of a triangular prism, a cuboid and a semi-cylinder, wherein a lug with a long hole 27 is arranged on the lower surface of one surface of the triangular prism, and one end of the penetrating claw body is provided with a shaft hole 26; the external thread at the middle upper part of the ejector rod is in threaded connection with the ring plate 19 with the internal thread; the lower part of the ejector rod is arranged in a middle hole 23 of the connecting sleeve 20, and the connecting sleeve is connected with a hole 18 with internal threads of the ejector rod through a small screw 17; the first shaft 21 connects the penetrating claw 13 with the connecting sleeve 20 through the shaft hole 26 and the small hole 24; the second shaft 15 passes through the round hole 16, the long hole 27 and the round hole 16 in sequence, so that the penetrating claw 13 is connected with the handle 4; the lower end of the handle 4 is in interference connection with the plug 14.
The working principle of the tibia platform of the invention is as follows: the upper fixing hole and the lower fixing hole are clamped by the clamping handle, the tibia platform is guaranteed not to rotate along with the ejector rod, the ejector rod 12 is screwed, the ejector rod 12 rotates downwards through threads to extrude the penetrating claw 13, the penetrating claw 13 rotates by taking the second shaft 15 as a supporting point, the penetrating claw rotates out of the vertical hole 9, the ejector rod is screwed continuously, and the penetrating claw penetrates into tibia cancellous bone and cortical bone.
Claims (1)
1. The utility model provides a biological knee joint mechanical locking structure shin bone platform, includes kidney shape platform support (1), characterized by is provided with dovetailed lug (3) at kidney shape platform support intussuseption department's upper surface, is provided with back recess (5) at dovetailed lug's two slant branch's lateral surfaces, is provided with arc lug (2) at kidney shape platform support and the upper surface of the external bight department of bending with respect to dovetailed lug, is provided with upper fixed orifices (7) and lower fixed orifices (8) from the top down at arc lug's lateral surface, is provided with anterior recess (6) at arc lug (2) medial surface; a hole (10) is arranged in the middle of the kidney-shaped platform support, the lower surface of the kidney-shaped platform support is connected with a handle (4), and the handle (4) is a reducer pipe with a smaller lower part and a thicker upper part; the lower surface of the kidney-shaped platform support is connected with the outer surface of the handle (4) through a support plate (11), and a hole (10) is communicated with the interior of the handle (4); the inner wall of the middle upper part of the handle (4) is provided with a ring plate (19) with internal threads, the middle lower part wall of the handle (4) is provided with two symmetrical vertical holes (9), and two sides of each vertical hole (9) are respectively provided with two round holes (16); the puncturing device comprises: a push rod (12), a small screw (17), a connecting sleeve (20) and a penetrating claw (13); the top of the ejector rod (12) is connected with a nut (22), the middle upper part of the ejector rod is provided with external threads, the lower part of the ejector rod is arranged smoothly, the outer diameter of the lower part of the ejector rod is smaller than the outer diameters of the middle and upper parts of the ejector rod, and the bottom of the ejector rod is upwards provided with a hole (18) with internal threads; the connecting sleeve (20) comprises a cylindrical body, an upward groove (25) is formed in the lower surface of the cylindrical body, a middle hole (23) is formed in the top of the cylindrical body, the middle hole (23) is communicated with the upward groove (25), and 4 small holes (24) perpendicular to the long axis direction of the groove are formed in the cylindrical body; the penetrating claw (13) comprises a penetrating claw body consisting of a triangular prism, a cuboid and a semi-cylinder, a lug with a long hole (27) is arranged on the lower surface of one surface of the triangular prism, and a shaft hole (26) is arranged at one end of the penetrating claw body; the external thread at the middle upper part of the ejector rod is in threaded connection with a ring plate (19) with internal threads; the lower part of the ejector rod is arranged in a middle hole (23) of the connecting sleeve (20), and the connecting sleeve is connected with a hole (18) with internal threads of the ejector rod through a small screw (17); the first shaft (21) connects the penetrating claw (13) with the connecting sleeve (20) through the shaft hole (26) and the small hole (24); the second shaft (15) sequentially passes through the round hole (16), the long hole (27) and the round hole (16) to enable the penetrating claw (13) to be connected with the handle (4); the lower end of the handle (4) is connected with the plug (14) in an interference way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308189.3A CN109925099B (en) | 2019-04-17 | 2019-04-17 | Biological knee joint mechanical locking structure tibia platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910308189.3A CN109925099B (en) | 2019-04-17 | 2019-04-17 | Biological knee joint mechanical locking structure tibia platform |
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| Publication Number | Publication Date |
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| CN109925099A CN109925099A (en) | 2019-06-25 |
| CN109925099B true CN109925099B (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910308189.3A Active CN109925099B (en) | 2019-04-17 | 2019-04-17 | Biological knee joint mechanical locking structure tibia platform |
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| CN (1) | CN109925099B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118453208B (en) * | 2024-06-12 | 2024-12-27 | 北京力达康科技有限公司 | Anatomic shoulder joint prosthesis |
| CN118717261B (en) * | 2024-07-25 | 2025-05-27 | 北京德益达美医疗科技有限公司 | Bone screw |
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| EP0010527A1 (en) * | 1978-10-06 | 1980-04-30 | L.I.M.A. Lualdi Industrie MeccanicheAnduis Srl. | Prosthesis for limbs |
| JPH0558119U (en) * | 1992-01-20 | 1993-08-03 | 川崎製鉄株式会社 | Artificial knee joint tibial parts |
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| DE202012100175U1 (en) * | 2012-01-18 | 2012-02-27 | Karl Storz Gmbh & Co. Kg | endoprosthesis |
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| CA2619896A1 (en) * | 2005-09-06 | 2007-03-15 | Fin-Ceramica Faenza S.P.A. | Pin for anchorage of articular prosthesis, articular prosthesis comprising said pin, tibial component and articular prosthesis for the knee comprising said tibial component |
| US7691150B2 (en) * | 2006-12-15 | 2010-04-06 | Zimmer Technology, Inc. | Modular plate and keel provisionals |
| US8715359B2 (en) * | 2009-10-30 | 2014-05-06 | Depuy (Ireland) | Prosthesis for cemented fixation and method for making the prosthesis |
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| FR2944694B1 (en) * | 2009-04-22 | 2012-05-18 | Tornier Sa | DEVICE FOR FIXING THE GLENE OF A GLENOIDAL ARTICULAR COMPONENT FOR A SHOULDER PROSTHESIS AND CORRESPONDING SHOULDER PROSTHESIS |
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| JP2017514534A (en) * | 2015-04-17 | 2017-06-08 | ライト メディカル テクノロジー インコーポレイテッドＷｒｉｇｈｔ Ｍｅｄｉｃａｌ Ｔｅｃｈｎｏｌｏｇｙ， Ｉｎｃ． | Inborn talar dome with expandable flange |
| US10856992B2 (en) * | 2016-04-27 | 2020-12-08 | AOD Holdings, LLC | Implant device(s) including tapered protrusions and method(s) for inserting the same into bone |
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2019
- 2019-04-17 CN CN201910308189.3A patent/CN109925099B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0010527A1 (en) * | 1978-10-06 | 1980-04-30 | L.I.M.A. Lualdi Industrie MeccanicheAnduis Srl. | Prosthesis for limbs |
| JPH0558119U (en) * | 1992-01-20 | 1993-08-03 | 川崎製鉄株式会社 | Artificial knee joint tibial parts |
| JPH07172606A (en) * | 1993-12-22 | 1995-07-11 | Yamato Sewing Mach Co Ltd | Label pickup device |
| DE202012100175U1 (en) * | 2012-01-18 | 2012-02-27 | Karl Storz Gmbh & Co. Kg | endoprosthesis |
| CN103705319A (en) * | 2013-12-27 | 2014-04-09 | 北京爱康宜诚医疗器材股份有限公司 | Biological fixation type tibia platform |
| CN106175992A (en) * | 2015-04-29 | 2016-12-07 | 宝楠生技股份有限公司 | Femoral stem fixing device |
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| CN210056349U (en) * | 2019-04-17 | 2020-02-14 | 嘉思特华剑医疗器材(天津)有限公司 | Biological knee joint mechanical locking structure tibial plateau |
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| CN109925099A (en) | 2019-06-25 |
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Address after: No.27 Ziyang Road Nankai District Tianjin 300190 Applicant after: Jiasite medical equipment (Tianjin) Co.,Ltd. Address before: No.27 Ziyang Road Nankai District Tianjin 300190 Applicant before: Jiasite Huajian Medical Equipment(Tianjin)Co.,Ltd. |
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