CN110538007B - Elbow joint prosthesis - Google Patents
Elbow joint prosthesis Download PDFInfo
- Publication number
- CN110538007B CN110538007B CN201910867246.1A CN201910867246A CN110538007B CN 110538007 B CN110538007 B CN 110538007B CN 201910867246 A CN201910867246 A CN 201910867246A CN 110538007 B CN110538007 B CN 110538007B
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- ulna
- head
- component
- humeral
- radius
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- 210000002310 elbow joint Anatomy 0.000 title claims abstract description 31
- 210000000623 ulna Anatomy 0.000 claims abstract description 84
- 210000004095 humeral head Anatomy 0.000 claims description 57
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000001766 physiological effect Effects 0.000 claims description 5
- 238000002513 implantation Methods 0.000 claims description 4
- 210000002758 humerus Anatomy 0.000 abstract description 34
- 210000000988 bone and bone Anatomy 0.000 description 6
- 239000007943 implant Substances 0.000 description 2
- 208000015181 infectious disease Diseases 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
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
- A61F2/38—Joints for elbows or knees
- A61F2/3804—Joints for elbows or knees for elbows
- A61F2002/3813—Joints for elbows or knees for elbows for ulno-humeral 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
- 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
Landscapes
- 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 provides an elbow joint prosthesis, which is provided with a connecting component, a humerus component, an ulna component and a radius component, wherein the humerus component comprises a humerus handle and a humerus head arranged at one end of the humerus handle, the humerus head is connected with the connecting component in an adjustable position, and the humerus head can swing along a first axis relative to the connecting component to carry out position adjustment; the ulna part comprises an ulna handle and an ulna head arranged at one end of the ulna handle, the ulna head is arranged on the connecting part in a swinging way, and the ulna head can swing relative to the connecting part along a second axis which is perpendicular to the first axis; the radius part is provided on the connection part, and the radius part is movable within a predetermined range with respect to the connection part. By adopting the technical scheme, the angle adjustment of the humeral component and the ulna component in two different directions can be realized, so as to meet the use requirements of different patients. The radius part is arranged to facilitate the movement of the patient and avoid damage caused by the overlarge movement range.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an elbow joint prosthesis.
Background
When the elbow joint is damaged by rheumatism, deformity joint, trauma, or the like, the function of the elbow joint is lost, and intense pain is felt. In this case, in order to restore the function of the elbow joint, an artificial elbow joint replacement operation is required. For example, during a total elbow replacement procedure, a surgeon implants a prosthetic humeral component into the distal end of a patient's humerus and implants a prosthetic ulna component into the proximal end of the patient's ulna. The relative positions of the humerus component and the ulna component in the existing elbow joint prosthesis are not easy to adjust, so that the universality is poor, and the use requirements of patients cannot be met.
Disclosure of Invention
The invention provides an elbow joint prosthesis, which aims to solve the problem that the relative positions of a humerus component and an ulna component of the elbow joint prosthesis are not easy to adjust in the prior art.
In order to solve the above problems, the present invention provides an elbow joint prosthesis comprising: a connecting member; a humeral component including a humeral stem and a humeral head disposed at one end of the humeral stem, the humeral head being adjustably connectable with the connecting component, the humeral head being swingable relative to the connecting component along a first axis for positional adjustment; an ulna part including an ulna stem and an ulna head disposed at one end of the ulna stem, the ulna head being swingably disposed on the connecting part, the ulna head being swingable relative to the connecting part along a second axis, the second axis being perpendicular to the first axis; the radius part is arranged on the connecting part and can move within a preset range relative to the connecting part.
Further, the connecting member includes a first connecting portion and a second connecting portion detachably connected, the humeral head is adjustably connected with the first connecting portion, the ulna is swingably provided on the second connecting portion, and the radius member is movably provided on the second connecting portion.
Further, the humeral head has a plurality of teeth thereon, and the first connection portion includes: the first connecting piece is provided with a plurality of teeth, the humeral head is detachably connected with the first connecting piece, and the positions of the teeth on the humeral head are adjustably matched with the teeth on the first connecting piece in a limiting way; the second connecting piece is connected with the first connecting piece, the second connecting part is arranged on the second connecting piece in a penetrating mode, and the ulna part is hinged with the second connecting part.
Further, the humeral head includes a first body connected to the humeral stem and a plurality of teeth disposed on the first body, the plurality of teeth of the humeral head disposed on one side of the first body about the first axis; the first connecting piece comprises a second body and a plurality of teeth arranged on the second body, the second body is connected with the second connecting part, and the teeth of the first connecting piece are arranged on one side of the second body around the first axis.
Further, the elbow joint prosthesis further includes a fastener removably coupled to the first connector and the humeral head to fixedly couple the humeral head to the first connector after the relative positions of the humeral head and the first connector are adjusted.
Further, the second connecting piece comprises a supporting piece and two limiting rings arranged on the supporting piece at intervals, the supporting piece is connected with the first connecting piece, the second connecting portion penetrates through the two limiting rings, the ulna head is located between the two limiting rings, and two sides of the ulna head are in limiting fit with the two limiting rings in a one-to-one correspondence mode.
Further, the ulna head comprises a barrel body and a limiting piece which is arranged on the outer wall of the barrel body in a protruding mode, at least one of the barrel body and the limiting piece is connected with the ulna handle, the barrel body is sleeved on the second connecting portion so as to swing along the second axis relative to the connecting component, and two sides of the limiting piece are in limiting fit with two sides of the supporting piece in a one-to-one correspondence mode so as to limit the rotation range of the barrel body.
Further, the second connecting portion is of a columnar structure, the second connecting portion is arranged in the first connecting portion in a penetrating mode, a groove is formed in one end of the second connecting portion, and the radius part is movably arranged in the groove.
Further, the side wall of the groove is provided with a limiting groove, and two side walls of the limiting groove are respectively in limiting fit with the radius part so as to limit the moving range of the radius part.
Further, the radius part comprises a ball head, a middle rod and a radius handle which are sequentially connected, wherein the ball head is rotatably arranged in the groove, and an included angle is formed between the extending direction of the middle rod and the extending direction of the radius handle.
By applying the technical scheme of the invention, a connecting part, a humerus part, an ulna part and a radius part are arranged in the elbow joint prosthesis, wherein the humerus part comprises a humerus handle and a humerus head arranged at one end of the humerus handle, the humerus head is connected with the connecting part in an adjustable position, and the humerus head can swing relative to the connecting part along a first axis to adjust the position; the ulna part comprises an ulna handle and an ulna head arranged at one end of the ulna handle, the ulna head is arranged on the connecting part in a swinging way, and the ulna head can swing relative to the connecting part along a second axis which is perpendicular to the first axis; the radius part is provided on the connection part, and the radius part is movable within a predetermined range with respect to the connection part. By adopting the technical scheme, the angle adjustment of the humeral component and the ulna component in two different directions can be realized, wherein the relative position of the humeral head and the ulna component in one direction can be adjusted by swinging the humeral head along the first axis relative to the connecting component, and the humeral head is implanted into a patient after being adjusted so as to meet the use requirements of different patients, and the ulna head can swing along the second axis relative to the connecting component and can meet the physiological activity requirements of the patient after being implanted. Moreover, the radius part can move within a preset range relative to the connecting part, which is convenient for the patient to move and can avoid damage caused by overlarge moving range.
The elbow joint prosthesis not only accords with the daily behavior movement characteristics of a human body, but also has good stability and safety, can perform partial replacement or complete replacement, improves the biocompatibility with bone, is not easy to cause complications such as loosening, infection, instability and the like, and has long service life.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 shows a schematic structural view of an elbow joint prosthesis provided by an embodiment of the present invention;
FIG. 2 shows a side view of the elbow joint prosthesis of FIG. 1;
FIG. 3 shows a partial schematic view of the humeral component of FIG. 1;
fig. 4 shows a schematic structural view of a first connection portion in the connection part in fig. 1;
FIG. 5 shows a schematic view of the ulna component of FIG. 1;
fig. 6 shows a schematic structural view of a second connection portion in the connection part of fig. 1;
fig. 7 shows a schematic view of the radius part of fig. 1.
Wherein the above figures include the following reference numerals:
10. a connecting member; 11. a first connection portion; 12. a second connecting portion; 13. a first connector; 14. a second connector; 15. a support; 16. a limiting ring; 17. a groove; 18. a limit groove; 20. a humeral component; 21. humeral stem; 22. humeral head; 30. an ulna component; 31. ulna stem; 32. a ruler bone; 33. a cylinder; 34. a limiting piece; 40. a radius component; 41. ball head; 42. an intermediate lever; 43. radius handle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 7, an embodiment of the present invention provides an elbow joint prosthesis including: a connecting member 10; a humeral component 20, the humeral component 20 comprising a humeral stem 21 and a humeral head 22 disposed at one end of the humeral stem 21, the humeral head 22 being adjustably connected with the connection component 10, the humeral head 22 being swingable relative to the connection component 10 along a first axis for positional adjustment; an ulna part 30, the ulna part 30 comprising an ulna stem 31 and an ulna head 32 provided at one end of the ulna stem 31, the ulna head 32 being swingably provided on the connection part 10, the ulna head 32 being swingable along a second axis with respect to the connection part 10, the second axis being perpendicular to the first axis; a radius part 40, the radius part 40 being provided on the connection part 10, the radius part 40 being movable within a predetermined range with respect to the connection part 10.
By applying the technical solution of the present embodiment, a connecting component 10, a humeral component 20, an ulna component 30 and a radius component 40 are provided in an elbow joint prosthesis, wherein the humeral component 20 comprises a humeral stem 21 and a humeral head 22 provided at one end of the humeral stem 21, the humeral head 22 is connected with the connecting component 10 in an adjustable position, and the humeral head 22 can swing along a first axis relative to the connecting component 10 for position adjustment; the ulna part 30 includes an ulna stem 31 and an ulna head 32 provided at one end of the ulna stem 31, the ulna head 32 being swingably provided on the connection part 10, the ulna head 32 being swingable relative to the connection part 10 along a second axis perpendicular to the first axis; the radius part 40 is provided on the connection part 10, and the radius part 40 is movable within a predetermined range with respect to the connection part 10. By adopting the technical scheme, the angle adjustment of the humeral component 20 and the ulna component 30 in two different directions can be realized, wherein the relative position of the humeral head 22 and the ulna component 30 in one direction can be adjusted by swinging the humeral head 22 along the first axis relative to the connecting component 10, and the humeral head is implanted into a patient after the adjustment so as to meet the use requirements of different patients, and the ulna head 32 can swing along the second axis relative to the connecting component 10 so as to meet the physiological activity requirements of the patient after the implantation. Furthermore, the radius part 40 can move within a predetermined range with respect to the connection part 10, facilitating patient movement and avoiding damage caused by an excessive range of movement.
In the present embodiment, the connecting member 10 includes a first connecting portion 11 and a second connecting portion 12, the first connecting portion 11 and the second connecting portion 12 are detachably connected, the humeral head 22 is adjustably connected with the first connecting portion 11, the ulna head 32 is swingably provided on the second connecting portion 12, and the radius member 40 is movably provided on the second connecting portion 12. Through the arrangement, arrangement and connection of all the components are facilitated. The humerus 22 is adjustably connected to the first joint 11, so that the relative position of the humerus component 20 and the joint component 10 can be adjusted, and the humerus component can be fixed after adjustment to determine the positional relationship of the humerus component and the joint component.
In the present embodiment, the humeral head 22 has a plurality of teeth thereon, and the first connection portion 11 includes: a first connecting piece 13, wherein the first connecting piece 13 is provided with a plurality of teeth, the humerus head 22 is detachably connected with the first connecting piece 13, and the teeth on the humerus head 22 are in position-limited fit with the teeth on the first connecting piece 13; the second connecting piece 14 is connected with the first connecting piece 13, the second connecting part 12 is arranged on the second connecting piece 14 in a penetrating way, and the ulna part 30 is hinged with the second connecting part 12. The angle of the humeral component 20 relative to the first connector 13 can thus be adjusted by adjusting the relative positions of the teeth on the humeral head 22 and the teeth on the first connector 13, and limited by the engagement of the teeth after the angle adjustment. It will be appreciated that when positional adjustment is required, the humeral head 22 is disconnected from the first connector 13, the humeral head 22 is then connected to the first connector 13 after adjustment, and the humeral head 22 is restrained from loosening by engagement of the teeth on the humeral head 22 with the teeth on the first connector 13. Articulating the ulna component 30 to the second connecting portion 12 facilitates physiological activity.
Specifically, the humeral head 22 includes a first body connected to the humeral stem 21 and a plurality of teeth disposed on the first body, the plurality of teeth of the humeral head 22 disposed on one side of the first body about a first axis; the first connecting member 13 includes a second body connected to the second connecting portion 12 and a plurality of teeth provided on the second body, and the plurality of teeth of the first connecting member 13 are provided around the first axis at one side of the second body. After a certain angle of rotation, the teeth of the humerus head 22 are meshed with the teeth of the first connecting piece 13, so that reliable limit is realized, loosening is avoided, and the long-term implantation reliability of the prosthesis is ensured.
In this embodiment, the elbow joint prosthesis further comprises a fastener removably coupled to the first connector 13 and the humeral head 22 to fixedly couple the humeral head 22 to the first connector 13 after the relative positions of the humeral head 22 and the first connector 13 are adjusted. In this way, the humeral head 22 is removed and securely attached to the first connector 13 by fasteners.
In this embodiment, the second connecting member 14 includes a supporting member 15 and two limiting rings 16 disposed on the supporting member 15 at intervals, the supporting member 15 is connected with the first connecting member 13, the second connecting portion 12 passes through the two limiting rings 16, the ulna head 32 is located between the two limiting rings 16, and two sides of the ulna head 32 are in a one-to-one corresponding limiting fit with the two limiting rings 16. In this way, the second connecting portion 12 and the second connecting member 14 can be connected in a plugging manner, and two limiting rings 16 can be used for limiting two sides of the ulna head 32 so as to avoid loosening.
In this embodiment, the ulnar head 32 includes a barrel 33 and a limiting member 34 protruding from an outer wall of the barrel 33, at least one of the barrel 33 and the limiting member 34 is connected to the ulnar stem 31, the barrel 33 is sleeved on the second connecting portion 12 to swing along the second axis relative to the connecting member 10, and two sides of the limiting member 34 are in limit fit with two sides of the supporting member 15 in a one-to-one correspondence to limit a rotation range of the barrel 33. The barrel 33 is sleeved on the second connecting part 12, so that the oscillation of the ruler bone 32 relative to the connecting part 10 is realized. Moreover, the two sides of the limiting piece 34 are in one-to-one corresponding limiting fit with the two sides of the supporting piece 15, so that the rotation range of the cylinder 33 can be limited, and the normal movement range of the elbow joint is avoided.
In this embodiment, the second connecting portion 12 has a columnar structure, the second connecting portion 12 is disposed in the first connecting portion 11 in a penetrating manner, one end of the second connecting portion 12 has a groove 17, and the radius part 40 is movably disposed in the groove 17. By the above arrangement, the second connection portion 12 is facilitated to be connected with the first connection portion 11. Furthermore, one end of the second connecting portion 12 has a groove 17 to facilitate the movement of the radius part 40 to meet the movement requirement of the human body.
Further, the side wall of the groove 17 is provided with a limiting groove 18, and two side walls of the limiting groove 18 are respectively in limiting fit with the radius part 40 so as to limit the movement range of the radius part 40. With the above arrangement, the movement of the radius part 40 can be limited to avoid damage caused by excessive movement. Is provided in the form of a limit groove 18, has simple structure and is convenient for processing.
In this embodiment, the radius part 40 includes a ball 41, an intermediate rod 42 and a radius shank 43 connected in sequence, wherein the ball 41 is rotatably disposed in the groove 17, and an angle is formed between an extending direction of the intermediate rod 42 and an extending direction of the radius shank 43. The ball 41 is rotatably arranged in the groove 17, so that the movement at multiple angles can be realized, and the movement of the radius part 40 is facilitated.
Alternatively, the inner surface of the recess 17 is part of a sphere, which better matches the ball 41. The intermediate rod 42 passes through the limit groove 18, and the intermediate rod 42 is in limit fit with two side walls of the limit groove 18, so as to limit the movement range of the radius part 40.
By applying the technical scheme of the invention, the connecting part 10, the humerus part 20, the ulna part 30 and the radius part 40 are arranged in the elbow joint prosthesis, wherein the humerus part 20 comprises a humerus handle 21 and a humerus head 22 arranged at one end of the humerus handle 21, the humerus head 22 is connected with the connecting part 10 in an adjustable position, and the humerus head 22 can swing relative to the connecting part 10 along a first axis for position adjustment; the ulna part 30 includes an ulna stem 31 and an ulna head 32 provided at one end of the ulna stem 31, the ulna head 32 being swingably provided on the connection part 10, the ulna head 32 being swingable relative to the connection part 10 along a second axis perpendicular to the first axis; the radius part 40 is provided on the connection part 10, and the radius part 40 is movable within a predetermined range with respect to the connection part 10. By adopting the technical scheme, the angle adjustment of the humeral component 20 and the ulna component 30 in two different directions can be realized, wherein the relative position of the humeral head 22 and the ulna component 30 in one direction can be adjusted by swinging the humeral head 22 along the first axis relative to the connecting component 10, and the humeral head is implanted into a patient after the adjustment so as to meet the use requirements of different patients, and the ulna head 32 can swing along the second axis relative to the connecting component 10 so as to meet the physiological activity requirements of the patient after the implantation. Furthermore, the radius part 40 can move within a predetermined range with respect to the connection part 10, facilitating patient movement and avoiding damage caused by an excessive range of movement.
The invention provides an elbow joint prosthesis, which comprises a humerus component, an ulna component, a radius component and a connecting component, wherein the humerus component comprises a humerus handle and a humeral head. Optionally, the humeral head has an adjustment accuracy of 1 ° (smaller angles can be made) with the first connector, and the humeral head or first connector has graduation marks to facilitate accurate position adjustment. The aim of adjusting the angle of the humeral component is achieved by adjustment between the humeral head and the first connector. The second connecting piece can be matched with the second connecting part to achieve the purpose of rotation.
Optionally, the humeral component further comprises a trabecular bone structure disposed on the humeral stem, which later on can be well integrated with the bone with good long term stability. The radius part comprises a radius head and a radius handle, wherein the radius head is arranged in the groove of the connecting part, has certain rotation characteristics and also prevents the elbow joint from being excessively everted.
The elbow joint prosthesis not only accords with the daily behavior movement characteristics of a human body, but also has good stability and safety, can perform partial replacement or complete replacement, improves the biocompatibility with bone, is not easy to cause complications such as loosening, infection, instability and the like, and has long service life.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An elbow joint prosthesis comprising:
a connection member (10);
-a humeral component (20), the humeral component (20) comprising a humeral stem (21) and a humeral head (22) arranged at one end of the humeral stem (21), the humeral head (22) being adjustably connected with the connection component (10), the humeral head (22) being swingable relative to the connection component (10) along a first axis for positional adjustment;
an ulna component (30), the ulna component (30) comprising an ulna stem (31) and an ulna head (32) disposed at one end of the ulna stem (31), the ulna head (32) being swingably disposed on the connecting component (10), the ulna head (32) being swingable relative to the connecting component (10) along a second axis to meet physiological activity requirements of a patient after implantation, the second axis being perpendicular to the first axis;
a radius part (40), the radius part (40) being disposed on the connection part (10), the radius part (40) being movable within a predetermined range with respect to the connection part (10) so as to facilitate patient movement and to avoid damage caused by an excessive range of movement;
the connecting component (10) comprises a first connecting part (11) and a second connecting part (12), the first connecting part (11) and the second connecting part (12) are detachably connected, the humeral head (22) is adjustably connected with the first connecting part (11), the ulna head (32) is arranged on the second connecting part (12) in a swinging way, and the radius component (40) is movably arranged on the second connecting part (12);
the humeral head (22) has a plurality of teeth thereon, and the first connection portion (11) includes: a first connector (13), wherein the first connector (13) is provided with a plurality of teeth, the humeral head (22) is detachably connected with the first connector (13), and the teeth on the humeral head (22) are in position-limited fit with the teeth on the first connector (13) in an adjustable way; a second connecting piece (14) connected with the first connecting piece (13), wherein the second connecting part (12) is arranged on the second connecting piece (14) in a penetrating way, and the ulna part (30) is hinged with the second connecting part (12);
the humeral head (22) comprises a first body connected to the humeral stem (21) and a plurality of teeth provided on the first body, the plurality of teeth of the humeral head (22) being provided on one side of the first body around the first axis; the first connecting piece (13) comprises a second body and a plurality of teeth arranged on the second body, the second body is connected with the second connecting part (12), and the plurality of teeth of the first connecting piece (13) are arranged on one side of the second body around the first axis;
the elbow joint prosthesis further comprises a fastener which is detachably connected with the first connecting piece (13) and the humeral head (22) so as to fixedly connect the humeral head (22) with the first connecting piece (13) after the relative position of the humeral head (22) and the first connecting piece (13) is adjusted.
2. Elbow joint prosthesis according to claim 1, wherein the second connecting piece (14) comprises a supporting piece (15) and two limiting rings (16) arranged on the supporting piece (15) at intervals, the supporting piece (15) is connected with the first connecting piece (13), the second connecting portion (12) penetrates through the two limiting rings (16), the ulna head (32) is located between the two limiting rings (16), and two sides of the ulna head (32) are in limiting fit with the two limiting rings (16) in a one-to-one correspondence.
3. Elbow joint prosthesis according to claim 2, wherein the ulna head (32) comprises a barrel (33) and a limiting member (34) protruding on the outer wall of the barrel (33), at least one of the barrel (33) and the limiting member (34) is connected with the ulna stem (31), the barrel (33) is sleeved on the second connecting portion (12) to swing along the second axis relative to the connecting member (10), and two sides of the limiting member (34) are in one-to-one limiting fit with two sides of the supporting member (15) to limit the rotation range of the barrel (33).
4. Elbow joint prosthesis according to claim 1, wherein the second connecting portion (12) has a cylindrical structure, the second connecting portion (12) is arranged in the first connecting portion (11) in a penetrating manner, one end of the second connecting portion (12) is provided with a groove (17), and the radius component (40) is movably arranged in the groove (17).
5. Elbow joint prosthesis according to claim 4, wherein the side walls of the recess (17) are provided with limiting grooves (18), and the two side walls of the limiting grooves (18) are respectively in limiting fit with the radius part (40) so as to limit the movement range of the radius part (40).
6. Elbow prosthesis according to claim 4, wherein the radius part (40) comprises a ball head (41), an intermediate rod (42) and a radius shank (43) connected in sequence, wherein the ball head (41) is rotatably arranged in the recess (17), and wherein the intermediate rod (42) has an angle between the direction of extension of the radius shank (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910867246.1A CN110538007B (en) | 2019-09-12 | 2019-09-12 | Elbow joint prosthesis |
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| CN115836931A (en) * | 2023-02-24 | 2023-03-24 | 北京爱康宜诚医疗器材有限公司 | Elbow joint prosthesis |
| CN115844597B (en) * | 2023-02-27 | 2023-07-14 | 北京积水潭医院 | Elbow joint prosthesis |
| CN116965981B (en) * | 2023-09-25 | 2024-01-23 | 北京爱康宜诚医疗器材有限公司 | Elbow joint prosthesis |
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| GB1528906A (en) * | 1974-10-11 | 1978-10-18 | Nat Res Dev | Endoprosthetic devices |
| US4224695A (en) * | 1978-03-16 | 1980-09-30 | Schutt & Grundei Gmbh | Endoprosthetic elbow joints |
| EP0493629A1 (en) * | 1989-12-09 | 1992-07-08 | GMT Gesellschaft für medizinische Technik mbH | Elbow endoprosthesis |
| CN1177469A (en) * | 1996-05-22 | 1998-04-01 | Gmt医疗技术有限公司 | Internal prothesis for elbow joint |
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