CN108836577B - Acetabular prosthesis and artificial hip joint - Google Patents
Acetabular prosthesis and artificial hip joint Download PDFInfo
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- CN108836577B CN108836577B CN201810817424.5A CN201810817424A CN108836577B CN 108836577 B CN108836577 B CN 108836577B CN 201810817424 A CN201810817424 A CN 201810817424A CN 108836577 B CN108836577 B CN 108836577B
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- 210000004394 hip joint Anatomy 0.000 title claims abstract description 17
- 230000000903 blocking effect Effects 0.000 claims abstract description 35
- 239000004570 mortar (masonry) Substances 0.000 claims description 25
- 230000005489 elastic deformation Effects 0.000 claims description 3
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 45
- 230000000694 effects Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 210000000588 acetabulum Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 210000001624 hip Anatomy 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000602 vitallium Substances 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
- A61F2/32—Joints for the hip
-
- 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
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
-
- 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
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (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 relates to the technical field of medical appliances, in particular to an acetabular prosthesis and an artificial hip joint. The acetabular prosthesis comprises a cup and a liner; the inner surface of the cup comprises a cup guide section, a blocking section and a locking groove section which are connected in sequence; the outer surface of the lining comprises a lining guide section, an allowable deformation groove section and a locking protruding section which are connected in sequence; the lining can be buckled with the cup so that the cup guide section is matched with the lining guide section, the blocking section is matched with the deformation-allowed groove section, and the locking groove section is matched with the locking protrusion section; the diameter of the locking convex section is smaller than that of the locking groove section, larger than that of the blocking section and not larger than that of the guide section of the cup. The artificial hip joint includes an acetabular prosthesis. The invention aims to provide an acetabular prosthesis and an artificial hip joint, which are used for solving the technical problems that in the prior art, a lining is easy to warp during operation, the hand feeling is unstable during operation and the bulge of the lining cannot be completely positioned in a groove of a cup.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to an acetabular prosthesis and an artificial hip joint.
Background
The useful life of an artificial hip prosthesis after implantation into the human body depends on several aspects: such as frictional wear properties of femoral head prostheses and acetabular prostheses, fixation of the femoral stem and acetabulum, locking and effects of the liner in the cup, and the like. Under the condition of complex stress of the hip joint, the lock and design of the liner on the cup undergo certain historical evolution, and the latest-generation liner and cup adopt a lock and combination mode, such as Schlegel R3, jiemai's Trilog, schsaick's Trident and the like; although the above designs achieve good clinical results in both theoretical and practical effects, certain problems remain, such as:
1. the lining is easy to be askew during operation or the unstable condition that the hand feeling is hard and relaxed when the lining is driven during operation is generated, once the condition is generated, the lining is positioned in the cup by a light person, and the locking effect between the lining and the cup is obviously reduced by a heavy person; if the lining is driven in place with an improper force, the lining locking part can be broken or serious plastic deformation can occur;
2. the protrusion of the liner cannot be fully seated in the groove of the cup, resulting in poor locking, easy liner removal during long-term use, or back chipping, etc.
Therefore, the invention provides a novel acetabular prosthesis and an artificial hip joint aiming at the problems, so that the liner can be conveniently and correctly driven into the acetabular cup, the probability that the liner is easy to warp during operation is reduced, the probability that the bulge of the liner cannot be completely put into place in the groove of the acetabular cup is reduced, and meanwhile, the hand feeling stability during operation is improved.
Disclosure of Invention
The invention aims to provide an acetabular prosthesis to solve the technical problems that in the prior art, a lining is easy to warp during operation, the hand feeling is unstable during operation and a bulge of the lining cannot be completely positioned in a groove of a cup.
The invention also aims to provide the artificial hip joint to solve the technical problems that the lining is easy to warp during operation, the hand feeling is unstable during operation and the bulge of the lining cannot be completely positioned in the groove of the cup in the prior art.
Based on the first object, the invention provides an acetabular prosthesis comprising a cup and a liner;
along the axial direction of the cup, the inner surface of the cup comprises a cup guide section, a blocking section and a locking groove section which are connected in sequence; wherein, relative to the locking groove section, the cup guide section is proximate to a cup opening of the cup;
the outer surface of the lining comprises a lining guide section, an allowable deformation groove section and a locking protruding section which are connected in sequence along the axial direction of the lining;
the lining can be buckled with the cup so that the cup guide section is matched with the lining guide section, the blocking section is matched with the deformation-allowed groove section, and the locking groove section is matched with the locking protrusion section;
the diameter of the locking protruding section and the diameter of the lining guiding section are respectively larger than the diameter of the deformation-tolerant groove section;
the diameter of the locking convex section is smaller than that of the locking groove section, the diameter of the locking convex section is larger than that of the blocking section, and the diameter of the locking convex section is not larger than that of the cup guide section;
the diameter of the lining guide section is not larger than that of the cup guide section;
the blocking section is in clearance fit with the deformation tolerant groove section.
The inner surface of the cup comprises a traction inner conical section; the traction inner conical surface section is connected with one end of the cup guide section, which is far away from the blocking section; the diameter of the traction inner conical section is gradually reduced to the guide section of the mortar cup along the axial direction of the mortar cup;
the outer surface of the inner liner comprises a traction outer conical surface section matched with the traction inner conical surface section; the traction outer conical surface section is connected with one end of the lining guide section, which is far away from the deformation-allowed groove section.
The alternative technical scheme of the invention is that the cone angle of the traction inner cone section is the same as the cone angle of the traction outer cone section;
the traction inner conical surface section is in interference fit with the traction outer conical surface section.
The optional technical scheme of the invention is that the cone angle of the traction inner cone section is more than or equal to 10 degrees;
the interference between the traction inner conical surface section and the traction outer conical surface section is 0-0.1mm.
The diameter of the locking convex section is equal to the diameter of the lining guide section;
the diameter of the locking convex section is smaller than that of the guide section of the cup;
the diameter of the lining guide section is smaller than that of the cup guide section.
The alternative technical scheme of the invention is that the clearance between the locking convex section and the guide section of the mortar cup is 0.01mm-0.1mm along the radial direction of the mortar cup;
the gap between the lining guide section and the cup guide section is 0.01mm-0.1mm;
the gap between the locking convex sections and the blocking sections is 0.05mm-0.15mm along the radial direction of the mortar cup;
the cross-sectional area of the gap between the blocking section and the deformation-tolerant groove section along the radial direction of the cup is not less than 0.2 square millimeter.
The inner surface of the cup comprises an anti-rotation groove section; the anti-rotation groove section is arranged at the cup mouth of the cup;
the outer surface of the liner includes an anti-rotation raised section that mates with the anti-rotation recessed section;
the anti-rotation groove section has a diameter greater than the cup guide section.
According to an alternative technical scheme, a plurality of anti-rotation groove sections are arranged on the inner surface of the mortar cup at intervals along the circumferential direction of the mortar cup; the number of the anti-rotation convex sections corresponds to the number of the anti-rotation groove sections one by one;
the anti-rotation raised section forms a raised volume of not less than 20 cubic millimeters.
The optional technical scheme of the invention is that the lining adopts medical plastic with elastic deformation; the cup is made of metal;
the locking projection section has a chamfer at an end thereof remote from the deformation-tolerant groove section.
Based on the second object, the artificial hip joint provided by the invention comprises the acetabular prosthesis.
By adopting the technical scheme, the invention has the beneficial effects that:
the invention provides an acetabular prosthesis, which comprises a cup and a liner; the inner surface of the mortar cup comprises a mortar cup guide section, a blocking section and a locking groove section which are sequentially connected, the outer surface of the liner comprises a liner guide section, an allowable deformation groove section and a locking protruding section which are sequentially connected, the diameter of the locking protruding section of the liner is not larger than that of the mortar cup guide section of the mortar cup, so that the mortar cup guide section of the mortar cup can guide the locking protruding section of the liner to enter the mortar cup, namely, the liner is guided to enter the mortar cup, self-adaptive guiding can be realized, the hand feeling of a user is stable and consistent, and the probability of easily distorting the liner during operation is reduced; the diameter of the locking convex section is larger than that of the blocking section, and the diameter of the locking convex section is smaller than that of the locking groove section, so that after the locking convex section is driven into the locking groove section, the locking groove section and the blocking section can firmly lock the locking convex section, and the locking effect of the lining in the mortar cup is improved; through the mutual cooperation of the guide section of the mortar cup, the blocking section, the locking groove section, the guide section of the lining, the allowable deformation groove section and the locking protruding section, the probability that the lining cannot be completely put in place in the mortar cup is reduced, the probability that the lining is easy to warp during operation is reduced, the consistency of stable hand feeling of operation is improved, and the locking effect of the lining and the mortar cup is improved.
The artificial hip joint provided by the invention can accurately drive the lining into the cup, reduce the probability of easily distorting the lining during operation, reduce the probability of the protrusion of the lining being unable to be completely positioned in the groove of the cup, and improve the hand feeling stability during operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a cup of an acetabular prosthesis according to an embodiment of the invention;
FIG. 2 is a schematic view of a liner of an acetabular prosthesis according to an embodiment of the invention;
FIG. 3 is a first state diagram of the acetabular cup and liner combination of an acetabular prosthesis according to a first embodiment of the invention;
FIG. 4 is a second state diagram of the acetabular cup and liner combination of an acetabular prosthesis according to a first embodiment of the invention;
FIG. 5 is a third state diagram of the acetabular cup and liner combination of an acetabular prosthesis according to a first embodiment of the invention;
FIG. 6 is a fourth state diagram of the acetabular cup and liner combination of an acetabular prosthesis according to a first embodiment of the invention;
fig. 7 is an exploded view of an acetabular prosthesis according to a first embodiment of the invention.
Icon: 1-a mortar cup; 11-locking groove segments; 12-a blocking section; 13-a cup guide section; 14-drawing the inner conical section; 15-an anti-rotation groove segment; 2-lining; 21-locking the protruding section; 22-tolerant deformation groove sections; 23-lining guide section; 24-pulling the outer conical surface section; 25-anti-rotation boss section.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. 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.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1-7, the present embodiment provides an acetabular prosthesis; fig. 1 is a schematic structural view of a cup of an acetabular prosthesis according to the present embodiment, and fig. 2 is a schematic structural view of a liner of an acetabular prosthesis according to the present embodiment, wherein fig. 1 and 2 are cross-sectional views of the cup and liner, and cross-sectional lines are not shown for clarity of illustration of the structure; 3-6 are four state diagrams of the cooperation of the acetabular cup and the liner of the acetabular prosthesis provided by the embodiment, wherein FIG. 3 shows a state in which the liner is not in contact with the acetabular cup, FIG. 4 shows a guiding state in which the liner is placed into the acetabular cup, no knocking is needed at this time, FIG. 5 shows an extrusion guiding state in which the liner is placed into the acetabular cup, so as to ensure no offset during driving, and FIG. 6 shows a state in which the liner is in place in the acetabular cup, and the allowable deformation space is very obvious; fig. 7 is an exploded view of the acetabular prosthesis provided by the present embodiment.
The acetabular prosthesis provided by the embodiment is suitable for an artificial hip joint prosthesis.
Referring to fig. 1-7, the acetabular prosthesis comprises a cup 1 and a liner 2;
along the axial direction of the cup 1, the inner surface of the cup 1 comprises a cup guide section 13, a blocking section 12 and a locking groove section 11 which are connected in sequence; wherein, relative to the locking groove section 11, the cup guide section 13 is close to the cup mouth of the cup 1;
along the axial direction of the liner 2, the outer surface of the liner 2 comprises a liner guide section 23, a deformation-tolerant groove section 22 and a locking convex section 21 which are connected in sequence; optionally, when the liner 2 is buckled with the cup 1, the axial direction of the cup 1 coincides with the axial direction of the liner 2.
The liner 2 can be buckled with the cup 1 so that the cup guide section 13 is matched with the liner guide section 23, the blocking section 12 is matched with the deformation-allowed groove section 22, and the locking groove section 11 is matched with the locking convex section 21;
the diameter of the locking convex section 21 of the liner 2 and the diameter of the liner guide section 23 are respectively larger than the diameter of the deformation-tolerant groove section 22;
the diameter of the locking convex section 21 of the lining 2 is smaller than that of the locking groove section 11, and the diameter of the locking convex section 21 is larger than that of the blocking section 12;
the diameter of the locking lobe segment 21 is no greater than the diameter of the cup guide segment 13 to provide guidance of the liner 2 into the cup 1 to ensure that the liner 2 does not tilt in the cup 1.
The diameter of the liner guide section 23 of the liner 2 is no greater than the diameter of the cup guide section 13; so that after the cup 1 and liner 2 are mated, liner guide section 23 of liner 2 can be received within cup guide section 13; the liner 2 is not inclined in the cup 1 and is smoothly put into place in the process of operation knocking to a certain extent.
The blocking section 12 is in clearance fit with the deformation tolerant groove section 22; i.e. after the liner 2 is buckled with the cup 1, a gap is reserved between the blocking section 12 and the deformation-tolerant groove section 22.
The acetabular prosthesis in the embodiment comprises a cup 1 and a liner 2; the inner surface of the cup 1 comprises a cup guide section 13, a blocking section 12 and a locking groove section 11 which are sequentially connected, the outer surface of the liner 2 comprises a liner guide section 23, an allowable deformation groove section 22 and a locking convex section 21 which are sequentially connected, the diameter of the locking convex section 21 of the liner 2 is not larger than that of the cup guide section 13 of the cup 1, so that the cup guide section 13 of the cup 1 can guide the locking convex section 21 of the liner 2 to enter the cup 1, namely, the liner 2 is guided to enter the cup 1, self-adaptive guiding can be realized, the hand feeling of a surgery is stable and consistent, and the probability that the liner 2 is easy to warp during the surgery is reduced; the diameter of the locking convex section 21 is larger than that of the blocking section 12, and the diameter of the locking convex section 21 is smaller than that of the locking groove section 11, so that after the locking convex section 21 is driven into the locking groove section 11, the locking groove section 11 and the blocking section 12 can firmly lock the locking convex section 21, and the locking effect of the liner 2 in the cup 1 is improved; through the mutual cooperation of the cup guide section 13, the blocking section 12, the locking groove section 11, the liner guide section 23, the deformation-tolerant groove section 22 and the locking convex section 21, the probability that the liner 2 cannot be completely put into place in the cup 1 is reduced, the probability that the liner 2 is easy to warp during operation is reduced, the consistency of stable hand feeling during operation is improved, and the locking effect of the liner 2 and the cup 1 is improved.
In an alternative to this embodiment, the inner surface of the cup 1 comprises a pulling inner cone section 14; the inner cone section 14 is pulled to be connected with one end of the cup guide section 13 far away from the blocking section 12; pulling the diameter of the inner conical section 14 to be gradually reduced to a cup guide section 13 along the axial direction of the cup 1; i.e. the diameter of the end of the inner conical section 14 that is drawn closer to the mouth of the cup 1 is greater than the diameter of the end thereof that is closer to the cup guide section 13 and further from the blocking section 12.
The outer surface of liner 2 includes a pull outer cone segment 24 that mates with pull inner cone segment 14; the pull-out outer cone section 24 is connected to the end of the liner guide section 23 remote from the deformation-tolerant groove section 22. The diameter of the pulling outer conical surface section 24 is gradually reduced to the lining guide section 23 along the axial direction of the lining 2; i.e. the diameter of the end of the pull outer conical surface section 24 adjacent the mouth of the cup 1 is greater than the diameter of the end thereof adjacent the liner guide section 23 remote from the deformation-permitting channel section 22. Preliminary guiding of the liner 2 to the cup 1 is achieved by pulling the inner cone section 14 and pulling the outer cone section 24.
In an alternative to this embodiment, the taper angle of the pull inner cone section 14 is the same as the taper angle of the pull outer cone section 24; as shown in fig. 1, the taper angle of the pull inner taper section 14 is a; as shown in fig. 2, the taper angle of the pull outer cone segment 24 is B.
The pulling inner cone section 14 is an interference fit with the pulling outer cone section 24. By employing an interference fit, the locking effect of the liner 2 in the cup 1 is further enhanced. Specifically, by means of knocking during operation, the locking convex section 21 of the liner 2 accurately enters the locking groove section 11 of the cup 1, in order to reduce or avoid the unstable state that the liner 2 can freely move or shake in the cup 1, and ensure good locking effect of the liner 2 and the cup 1, in this embodiment, the taper angle of the pulling inner taper section 14 is the same as the taper angle of the pulling outer taper section 24, and the pulling inner taper section 14 is in interference fit with the pulling outer taper section 24, so that the locking convex section 21 and the locking groove section 11 are always in a pulled state for a long time, that is, the acetabular prosthesis has internal stress. I.e., the pulling inner cone segment 14 and the pulling outer cone segment 24 provide this internal stress.
Optionally, the taper angle of the drawn inner cone section 14 is greater than or equal to 10 °; alternatively, the taper angle of the pull inner cone section 14 is the same as the taper angle of the pull outer cone section 24, both being 10 ° or greater. This angle prevents the self-locking between liner 2 and cup 1 and does not allow the pulling of locking boss 21.
Alternatively, the interference between the pulling inner cone section 14 and the pulling outer cone section 24 is 0-0.1mm.
In an alternative to this embodiment, the diameter of the locking lobe segment 21 is no greater than the diameter of the liner guide segment 23; alternatively, the diameter of the locking boss section 21 of the liner 2 is equal to the diameter of the liner guide section 23; so that the locking convex section 21 of the liner 2 enters the cup 1, namely, the liner 2 is guided into the cup 1, so that self-adaptive guiding can be realized, and the hand feeling of the operation is stable and consistent.
Optionally, the locking lobe segment 21 of liner 2 has a diameter less than the cup guide segment 13; optionally, the clearance between the locking convex section 21 of the liner 2 and the cup guide section 13 is 0.01mm-0.1mm along the radial direction of the cup 1; that is, the cup guide section 13 diameter minus half of the diameter of the locking boss section 21 is between 0.01mm and 0.1mm.
Optionally, the liner guide section 23 of the liner 2 has a diameter smaller than the cup guide section 13. Optionally, the clearance between the liner guide section 23 of the liner 2 and the cup guide section 13 is 0.01mm-0.1mm in the radial direction of the cup 1; that is, the cup guide section 13 diameter minus half of the liner guide section 23 diameter is between 0.01mm and 0.1mm.
Optionally, the locking convex section 21 of the liner 2 is 0.05mm-0.15mm larger than the gap between the blocking sections 12 in the radial direction of the cup 1; that is, the half of the diameter of the locking lobe segment 21 minus the diameter of the stop segment 12 is between 0.05mm and 0.15mm to ensure a locking effect after the liner 2 is driven into the cup 1 without causing excessive surgical difficulty.
Optionally, the cross-sectional area of the gap between the blocking section 12 and the deformation-tolerant groove section 22 is not less than 0.2 square mm in the radial direction of the cup 1; when the liner 2 is driven into the cup 1, the locking boss 21 deforms the material, and the deformed material requires a certain space to accommodate, which is an important space to accommodate the deformation of the material.
In an alternative to this embodiment, the inner surface of the cup 1 comprises an anti-rotation groove segment 15; the anti-rotation groove section 15 is arranged at the cup mouth of the cup 1; optionally, an anti-rotation groove segment 15 is provided at the end of the pull inner cone segment 14 near the mouth of the cup 1.
Optionally, the outer surface of liner 2 includes anti-rotation raised sections 25 that mate with anti-rotation groove sections 15; when a person moves, torque exists between the liner 2 and the cup 1; the anti-rotation groove segment 15 cooperates with the anti-rotation tab segment 25 to prevent rotation of the cup 1 relative to the liner 2.
The anti-rotation groove section 15 has a diameter greater than the cup guide section 13. Optionally, the anti-rotation groove segment 15 has a diameter greater than the diameter of the pulling inner cone segment 14.
Optionally, a plurality of anti-rotation groove segments 15 are provided at intervals along the circumference of the cup 1, the inner surface of the cup 1; the number of the anti-rotation convex sections 25 corresponds to the number of the anti-rotation groove sections 15 one by one; by providing a plurality of anti-rotation groove segments 15 and anti-rotation raised segments 25, the anti-rotation performance between the cup 1 and liner 2 is improved, reducing the risk of fracture during processing or use.
Alternatively, the number of anti-rotation groove segments 15 is 3-6; i.e. the number of anti-rotation protruding sections 25 is 3-6.
Alternatively, the anti-rotation boss section 25 forms a boss having a volume of not less than 20 cubic millimeters; alternatively, the anti-rotation groove segment 15 forms a groove having a volume of not less than 20 cubic millimeters. So as to facilitate the processing of the anti-rotation groove segment 15 and the anti-rotation protrusion segment 25 and reduce burrs in production.
In an alternative of this embodiment, the liner 2 is made of a medical plastic material having elastic deformation; the cup 1 is made of metal; for example, the cup 1 is made of titanium alloy, cobalt-chromium-molybdenum alloy, stainless steel, or other materials meeting the requirements of biosafety.
In an alternative to this embodiment, the locking projection 21 of the liner 2 has a chamfer at the end remote from the deformation-tolerant groove 22; to facilitate the entry of the locking of the convex segment 21 into the cup 1.
Example two
A second embodiment provides an artificial hip joint, the embodiment includes the acetabular prosthesis described in the first embodiment, and technical features of the acetabular prosthesis disclosed in the first embodiment are also applicable to the embodiment, and technical features of the acetabular prosthesis disclosed in the first embodiment are not repeated.
The artificial hip joint provided by the embodiment comprises an acetabular prosthesis; also comprises a femoral head prosthesis; the femoral head prosthesis is matched with the inner liner of the acetabular prosthesis. The artificial hip joint can accurately drive the lining into the mortar cup, reduces the probability of easily skewing the lining during operation, reduces the probability that the bulge of the lining cannot be completely positioned in the groove of the mortar cup, and can improve the hand feeling stability during operation.
The artificial hip joint of the present embodiment has the advantages of the acetabular prosthesis of embodiment one, and the advantages of the acetabular prosthesis of embodiment one disclosed herein are not repeated here.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention. Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims below, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Claims (11)
1. An acetabular prosthesis comprising a cup and a liner;
along the axial direction of the cup, the inner surface of the cup comprises a cup guide section, a blocking section and a locking groove section which are connected in sequence; wherein, relative to the locking groove section, the cup guide section is proximate to a cup opening of the cup;
the outer surface of the lining comprises a lining guide section, an allowable deformation groove section and a locking protruding section which are connected in sequence along the axial direction of the lining;
the lining can be buckled with the cup so that the cup guide section is matched with the lining guide section, the blocking section is matched with the deformation-allowed groove section, and the locking groove section is matched with the locking protrusion section;
the diameter of the locking protruding section and the diameter of the lining guiding section are respectively larger than the diameter of the deformation-tolerant groove section;
the diameter of the locking convex section is smaller than that of the locking groove section, the diameter of the locking convex section is larger than that of the blocking section, and the diameter of the locking convex section is not larger than that of the cup guide section;
the diameter of the lining guide section is not larger than that of the cup guide section;
the blocking section is in clearance fit with the deformation-tolerant groove section;
the inner lining is made of medical plastic with elastic deformation.
2. The acetabular prosthesis of claim 1, wherein the inner surface of the cup includes a tapered inner cone segment; the traction inner conical surface section is connected with one end of the cup guide section, which is far away from the blocking section; the diameter of the traction inner conical section is gradually reduced to the guide section of the mortar cup along the axial direction of the mortar cup;
the outer surface of the inner liner comprises a traction outer conical surface section matched with the traction inner conical surface section; the traction outer conical surface section is connected with one end of the lining guide section, which is far away from the deformation-allowed groove section.
3. The acetabular prosthesis of claim 2, wherein the taper angle of the pull inner taper segment is the same as the taper angle of the pull outer taper segment;
the traction inner conical surface section is in interference fit with the traction outer conical surface section.
4. The acetabular prosthesis of claim 3, wherein the taper angle of the pulling inner conical section is greater than or equal to 10 °;
the interference between the traction inner conical surface section and the traction outer conical surface section is 0-0.1mm.
5. The acetabular prosthesis of claim 1, wherein the locking boss section has a diameter equal to a diameter of the liner guide section;
the diameter of the locking convex section is smaller than that of the guide section of the cup;
the diameter of the lining guide section is smaller than that of the cup guide section.
6. The acetabular prosthesis of claim 5, wherein a gap between the locking boss section and the cup guide section is 0.01-0.1 mm in a radial direction of the cup;
the gap between the lining guide section and the cup guide section is 0.01mm-0.1mm along the radial direction of the cup;
the gap between the locking convex sections and the blocking sections is 0.05mm-0.15mm along the radial direction of the mortar cup;
the cross-sectional area of the gap between the blocking section and the deformation-tolerant groove section along the radial direction of the cup is not less than 0.2 square millimeter.
7. The acetabular prosthesis of claim 1, wherein the inner surface of the cup includes anti-rotation groove segments; the anti-rotation groove section is arranged at the cup mouth of the cup;
the outer surface of the liner includes an anti-rotation raised section that mates with the anti-rotation recessed section;
the anti-rotation groove section has a diameter greater than the cup guide section.
8. The acetabular prosthesis of claim 7, wherein the inner surface of the cup is provided with a plurality of the anti-rotation groove segments spaced apart along the circumference of the cup; the number of the anti-rotation convex sections corresponds to the number of the anti-rotation groove sections one by one;
the anti-rotation raised section forms a raised volume of not less than 20 cubic millimeters.
9. The acetabular prosthesis of claim 1, wherein the cup is metallic.
10. The acetabular prosthesis of claim 1, wherein an end of the locking boss section remote from the deformation-tolerant trough section has a chamfer.
11. An artificial hip joint comprising an acetabular prosthesis according to any of claims 1-10.
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| CN201810817424.5A CN108836577B (en) | 2018-07-24 | 2018-07-24 | Acetabular prosthesis and artificial hip joint |
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| CN201810817424.5A CN108836577B (en) | 2018-07-24 | 2018-07-24 | Acetabular prosthesis and artificial hip joint |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109567986B (en) | 2019-02-01 | 2023-11-24 | 北京爱康宜诚医疗器材有限公司 | Glenoid prosthesis and joint prosthesis with same |
| CN110833471A (en) * | 2019-11-26 | 2020-02-25 | 北京安颂科技有限公司 | Acetabulum prosthesis and artificial hip joint prosthesis |
| CN110786968A (en) * | 2019-12-06 | 2020-02-14 | 经纬医疗器材制造（深圳）有限公司 | Acetabulum prosthesis capable of being tightly matched |
| EP4094727A4 (en) * | 2020-01-21 | 2023-11-15 | Beijing Naton Medical Technology Holdings Co., Ltd. | Acetabular cup prosthesis and locking structure therefor |
| CN111281615A (en) * | 2020-03-06 | 2020-06-16 | 北京市春立正达医疗器械股份有限公司 | Total acetabular prosthesis |
| CN113730043B (en) * | 2021-09-28 | 2024-05-28 | 上海联影智融医疗科技有限公司 | Acetabular cup assembly |
| CN115462935B (en) * | 2022-08-12 | 2024-08-06 | 广州市威马兽医科技服务有限公司 | Double-layer acetabular cup prosthesis and preparation method thereof |
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