CN111616843A - Elbow joint replacement prosthesis - Google Patents

Elbow joint replacement prosthesis Download PDF

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Publication number
CN111616843A
CN111616843A CN202010622428.5A CN202010622428A CN111616843A CN 111616843 A CN111616843 A CN 111616843A CN 202010622428 A CN202010622428 A CN 202010622428A CN 111616843 A CN111616843 A CN 111616843A
Authority
CN
China
Prior art keywords
humerus
handle
ulna
liner
clamping pin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010622428.5A
Other languages
Chinese (zh)
Inventor
王熙泽
史春宝
郭静
王振国
朱更博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hebei Chunli Hangnuo New Material Technology Co ltd
Original Assignee
Hebei Chunli Hangnuo New Material Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hebei Chunli Hangnuo New Material Technology Co ltd filed Critical Hebei Chunli Hangnuo New Material Technology Co ltd
Priority to CN202010622428.5A priority Critical patent/CN111616843A/en
Publication of CN111616843A publication Critical patent/CN111616843A/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A61F2/3804—Joints for elbows or knees for elbows
    • 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
    • A61F2002/30433—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
    • 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
    • A61F2002/30518—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements with possibility of relative movement between the prosthetic parts
    • 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
    • A61F2/3804—Joints for elbows or knees for elbows
    • A61F2002/3822—Humeral components
    • 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
    • A61F2/3804—Joints for elbows or knees for elbows
    • A61F2002/3831—Ulnar components

Abstract

The invention relates to the technical field of medical instruments, and provides an elbow joint replacement prosthesis. The method comprises the following steps: the ulna handle and the humerus handle can rotate relatively; an ulna liner is arranged in a circular hole at the connecting end of the ulna handle, the humerus handle is provided with two circular connecting parts, and the inner side of the circular hole of each circular connecting part is respectively provided with a humerus liner; the clamping pin sleeve penetrates through the ulna liner and the two humerus liners and is clamped with one humerus liner, the clamping pin penetrates through the clamping pin sleeve, and a clamping hook at the front end of the clamping pin is matched with the bottom surface of the groove of the clamping pin sleeve. The invention has the beneficial effects that: the ulna handle and the humerus handle are connected in a spherical semi-limiting mode, the ulna handle and the humerus handle are prevented from shaking up and down, meanwhile, the ulna handle and the humerus handle can rotate and swing at a certain angle, shear stress is dispersed, and loosening of a bone/bone cement/prosthesis interface due to conducted shear stress is prevented.

Description

Elbow joint replacement prosthesis
Technical Field
The invention relates to the technical field of medical instruments, in particular to an elbow joint replacement prosthesis.
Background
The elbow joint prosthesis is a surgical implant applied to elbow joint replacement surgery and used for replacing an elbow joint part of a human body patient. The existing elbow joint prosthesis mainly comprises a humerus prosthesis, an ulna prosthesis, a joint shaft locking nail and a shaft sleeve. The humerus prosthesis is used for being connected with a humerus of a human body, the ulna prosthesis is used for being connected with an ulna of the human body, the joint shaft locking nail is used for connecting the end parts of the humerus prosthesis and the ulna prosthesis so that the humerus prosthesis and the ulna prosthesis can rotate relatively to achieve the moving function of the elbow joint prosthesis, and the shaft sleeve is sleeved between the humerus prosthesis and the joint shaft locking nail and between the ulna prosthesis and the joint shaft locking nail to avoid contact between metal materials.
However, in order to adapt to the shear stress generated by the radius of the human body during rotation and swing, a certain gap is usually designed at the rotational connection position of the ulna prosthesis through the shaft sleeve and the joint shaft locking nail in the elbow joint prosthesis in the prior art, for example, a certain gap is designed between the ulna prosthesis and the shaft sleeve, so that the ulna prosthesis can rotate relative to the humerus prosthesis and can swing through a larger gap, thereby effectively avoiding the phenomenon that the shear stress generated by the radius of the human body during rotation and swing is transmitted to the elbow joint prosthesis, bone cement or a bone interface to cause loosening or dislocation of the elbow joint prosthesis. However, this also causes a problem of a large wobble between the ulnar prosthesis and the humeral prosthesis to some extent, which easily causes loosening of the humeral prosthesis or the ulnar prosthesis, and reduces the connection stability of the elbow joint prosthesis. Even when the clearance is large, the wear of the joint surface at the elbow joint of the human body is easily caused.
In addition, the humeral stem of the prior art has high stress and is easily broken and damaged during use, and a new elbow replacement prosthesis is urgently needed to solve the problems.
Disclosure of Invention
The invention aims to provide an elbow joint replacement prosthesis, which aims to solve the technical problems in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: an elbow replacement prosthesis comprising: the ulna handle and the humerus handle can rotate relatively; an ulna liner is arranged in a circular hole at the connecting end of the ulna handle, the humerus handle is provided with two circular connecting parts, and the inner side of the circular hole of each circular connecting part is respectively provided with a humerus liner; a bayonet sleeve penetrates through the ulna liner and the two humerus liners and is clamped with one of the humerus liners, a bayonet penetrates through the bayonet sleeve, and a front end clamping hook of the bayonet is matched with the bottom surface of a groove of the bayonet sleeve; the circular hole of each connecting part is a stepped hole, and a circular transition part is arranged between each connecting part and the distal end of the humeral stem.
In an alternative embodiment, the ulna liner is provided with a ball profile on the outside, the ball profile being a semi-restrictive connection.
In an alternative embodiment, the distal end of the humeral stem has two bevels forming a triangular structure, and one side of the humeral stem is provided with an extramedullary winged auxiliary fixation.
In an alternative embodiment, the humeral stem is provided with a groove on the other side.
In an alternative embodiment, the distal end of the ulnar handle is quadrilateral in configuration.
In an alternative embodiment, the proximal end of the ulnar stem is coated with a metal puree.
In an alternative embodiment, the proximal end of the humeral stem is sintered using titanium beads.
The radius of the circular transition part is 24mm-32.5 mm.
The invention has the beneficial effects that:
(1) the ulna stem and the humerus stem of the elbow joint replacement prosthesis are connected in a spherical semi-limiting mode, the ulna stem and the humerus stem are prevented from shaking up and down, the ulna stem and the humerus stem can rotate and swing at a certain angle, shear stress is dispersed, and loosening of a bone/bone cement/prosthesis interface due to conducted shear stress is prevented. In addition, the inside of the clamping pin sleeve (joint shaft) is connected by a clamping pin, so that the clamping pin sleeve is convenient to mount and dismount during overhauling.
(2) The elbow joint replacement prosthesis is provided with the round transition part, so that stress can be generated on two sides during installation (during operation) and after installation (during use), the round transition part can effectively reduce the stress concentration condition of the original right-angle structure, and the possibility of fracture of two sides of the humerus is effectively prevented. The round hole of the connecting part of the humerus handle is a stepped hole, so that the clamping pin is prevented from moving left and right on the prosthesis after being installed, the sliding two ends are prevented from being broken when the prosthesis is installed and used, the shaft pin clamping pin of the humerus handle is prevented from being separated from two sides, and the humerus handle can effectively help patients with partial incomplete lower humerus ends (fractures and tumors) to use.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic view of the overall structure of an elbow joint replacement prosthesis according to an embodiment of the present invention.
FIG. 2 is an enlarged view of a portion of the FIG. 1A-A according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a bayonet provided in an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a bayonet sleeve according to an embodiment of the present invention.
Fig. 5 is a schematic view of an ulnar gasket according to an embodiment of the present invention.
Fig. 6 is a schematic structural view of a humeral liner according to an embodiment of the present invention.
Fig. 7 is a first schematic structural diagram of a humeral stem according to an embodiment of the present invention.
Fig. 8 is a second schematic structural diagram of a humeral stem according to an embodiment of the present invention.
Wherein, the reference numbers in the figures are: 1. ulna handle, 2, bayonet, 3, bayonet sleeve, 4, humerus handle, 5, ulna liner, 6, humerus liner, 7, extramedullary wing, 8, stepped hole, 9, connecting part, 10, round transition part, 11, inclined plane, 12 and groove.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
Referring to fig. 1-8, the present embodiment provides an elbow replacement prosthesis, comprising: the ulna handle 1 and the humerus handle 4, and the ulna handle 1 and the humerus handle 4 can rotate relatively; wherein, an ulna liner 5 is arranged in a round hole at the connecting end of the ulna handle 1, the humerus handle 4 is provided with two round connecting parts 9, and the inner side of the round hole of each round connecting part 9 is respectively provided with a humerus liner 6; the bayonet sleeve 3 penetrates through the ulna liner 5 and the two humerus liners 6 and is clamped with one humerus liner 6, the bayonet 2 penetrates through the bayonet sleeve 3, and the front end clamping hook of the bayonet 2 is matched with the bottom surface of the groove of the bayonet sleeve 3, so that the installation and the disassembly during the repair are facilitated.
It should be noted that the outer side of the ulna spacer 5 is provided with a spherical surface, and the spherical surface is in semi-limited connection, so that the ulna stem 1 and the humerus stem 4 can rotate and swing at a certain angle while the ulna stem 1 and the humerus stem 4 are prevented from shaking up and down, the shear stress is dispersed, and the bone/bone cement/prosthesis interface is prevented from being loosened due to the conducted shear stress.
Specifically, the round hole of each connecting portion 9 is a stepped hole 8, which prevents the bayonet 2 from moving left and right on the prosthesis after being installed, prevents the sliding ends from being broken when the prosthesis is installed and used, prevents the bayonet 2 of the humerus stem 4 from coming off from both sides, and effectively helps patients with partial incomplete humerus lower ends (fracture and tumor) to use.
A round transition part 10 is arranged between each connecting part 9 and the distal end of the humeral stem 4, preferably, the radius of the round transition part 10 is 24mm-32.5mm, both sides of the connecting part 9 can generate stress when the humeral stem 4 is installed (during operation) and after the humeral stem 4 is installed (during use), and the round transition part 10 can effectively reduce the stress concentration condition of the original right-angle structure and effectively prevent the possibility of fracture of both sides of the connecting part 9 of the humeral stem 4.
In this embodiment, the distal end of the humeral stem 5 has two inclined planes 11 to form a triangular structure, one side of the humeral stem 5 is provided with the extramedullary wing 7 for auxiliary fixation, the distal end of the humeral stem 4 adopts a triangular structure and is provided with the extramedullary wing 7 for auxiliary fixation, thereby reducing the rotation of the prosthesis in the humerus to the maximum extent and preventing the prosthesis from falling off from bone cement. The other side of the humerus handle 5 is provided with a groove 12, which is highly simulated, restores the skeleton structure of the human body and conforms to the movement track of muscles.
Further, the distal end of the ulna stem 1 has a quadrangular structure, so that stress is balanced, maximum strength support is provided, and rotation of the ulna prosthesis is reduced. The handle part of the ulna humerus prosthesis bone is naturally bent, the characteristic that the carrying angle of the human ulna is 10-15 degrees is met, the bending angle is in accordance with the structure of the medullary cavity of the human body, the medullary cavity of a patient is better adapted, and the possibility that the bone of the patient is injured during operation is reduced. The near end of the ulna handle 1 is sprayed with the metal protoplasm, so that the in-situ and long-term fixing strength of the bone cement is improved. The proximal end of the humerus stem 4 is sintered with titanium beads, which can improve the bone cement fixation strength and the bone ingrowth effect of the direct contact interface between a part of the prosthesis and the bone.
The ulna handle 1 is divided into a long and a short type, the humerus handle 4 is divided into a long extramedullary wing and a short extramedullary wing, humeral shafts with different lengths are arranged, and the longer humerus handle 4 and the extramedullary wing 7 are mainly used for patients with fracture or tumor and the like needing large bone cutting amount or bone defect. The prosthesis of the present invention may cover almost all elbow joint patient populations.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (8)

1. An elbow replacement prosthesis comprising: the ulna handle (1) and the humerus handle (4), wherein the ulna handle (1) and the humerus handle (4) can rotate relatively; an ulna liner (5) is installed in a circular hole at the connecting end of the ulna handle (1), the humerus handle (4) is provided with two circular connecting parts (9), and the inner side of the circular hole of each circular connecting part (9) is respectively provided with a humerus liner (6); the clamping pin sleeve (3) penetrates through the ulna liner (5) and the two humerus liners (6) and is clamped with one humerus liner (6), a clamping pin (2) penetrates through the clamping pin sleeve (3), and a clamping hook at the front end of the clamping pin (2) is matched with the bottom surface of a groove of the clamping pin sleeve (3);
the method is characterized in that: the round hole of each connecting part (9) is a stepped hole (8), and a round transition part (10) is arranged between each connecting part (9) and the far end of the humeral stem (4).
2. The elbow replacement prosthesis according to claim 1, characterized in that the ulnar gasket (5) is provided on its outside with a spherical profile, said spherical profile being a semi-constrained connection.
3. The elbow replacement prosthesis according to claim 1, characterized in that the distal end of the humeral stem (5) has two bevels (11) forming a triangular structure, one side of the humeral stem (5) being provided with an extramedullary wing (7) for auxiliary fixation.
4. The elbow replacement prosthesis according to claim 3, characterized in that the humeral stem (5) is provided with a groove (12) on the other side.
5. The elbow replacement prosthesis according to claim 1, characterized in that the distal end of the ulnar stem (1) is of quadrilateral configuration.
6. The elbow replacement prosthesis according to claim 1 wherein the proximal end of the ulnar stem (1) is coated with a metal stock.
7. The elbow replacement prosthesis according to claim 1, wherein the proximal end of the humeral stem (4) is sintered with titanium beads.
8. The elbow replacement prosthesis according to claim 1, characterized in that the radius of the rounded transition (10) is 24mm-32.5 mm.
CN202010622428.5A 2020-06-30 2020-06-30 Elbow joint replacement prosthesis Pending CN111616843A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010622428.5A CN111616843A (en) 2020-06-30 2020-06-30 Elbow joint replacement prosthesis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010622428.5A CN111616843A (en) 2020-06-30 2020-06-30 Elbow joint replacement prosthesis

Publications (1)

Publication Number Publication Date
CN111616843A true CN111616843A (en) 2020-09-04

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Application Number Title Priority Date Filing Date
CN202010622428.5A Pending CN111616843A (en) 2020-06-30 2020-06-30 Elbow joint replacement prosthesis

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115844597A (en) * 2023-02-27 2023-03-28 北京积水潭医院 Elbow joint prosthesis

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101043854A (en) * 2004-07-15 2007-09-26 瑞特医疗技术公司 Intramedullary fixation assembly and devices
US20110125274A1 (en) * 2009-11-16 2011-05-26 New York Society For The Ruptured And Crippled Maintaining The Hospital For Special Surgery Elbow replacement apparatus and methods
CN207152677U (en) * 2016-10-28 2018-03-30 北京力达康科技有限公司 A kind of antibacterial elbow joint prosthese
CN110192935A (en) * 2019-05-10 2019-09-03 北京市春立正达医疗器械股份有限公司 Elbow joint prosthese
CN110236745A (en) * 2019-05-09 2019-09-17 中国人民解放军陆军军医大学第一附属医院 Lumbar intervertebral fusion device with self-locking fixed function

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101043854A (en) * 2004-07-15 2007-09-26 瑞特医疗技术公司 Intramedullary fixation assembly and devices
US20110125274A1 (en) * 2009-11-16 2011-05-26 New York Society For The Ruptured And Crippled Maintaining The Hospital For Special Surgery Elbow replacement apparatus and methods
CN207152677U (en) * 2016-10-28 2018-03-30 北京力达康科技有限公司 A kind of antibacterial elbow joint prosthese
CN110236745A (en) * 2019-05-09 2019-09-17 中国人民解放军陆军军医大学第一附属医院 Lumbar intervertebral fusion device with self-locking fixed function
CN110192935A (en) * 2019-05-10 2019-09-03 北京市春立正达医疗器械股份有限公司 Elbow joint prosthese

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115844597A (en) * 2023-02-27 2023-03-28 北京积水潭医院 Elbow joint prosthesis
CN115844597B (en) * 2023-02-27 2023-07-14 北京积水潭医院 Elbow joint prosthesis

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Application publication date: 20200904