CN209808651U - Artificial shoulder joint - Google Patents
Artificial shoulder joint Download PDFInfo
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- CN209808651U CN209808651U CN201920259832.3U CN201920259832U CN209808651U CN 209808651 U CN209808651 U CN 209808651U CN 201920259832 U CN201920259832 U CN 201920259832U CN 209808651 U CN209808651 U CN 209808651U
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Abstract
The utility model discloses an artificial shoulder joint, including upper arm bone bulb and the back of connection on the scapula, still include potsherd and support body, the potsherd is a set of potsherd, and a set of potsherd dispersion is arranged on the support body, the inboard of back of the stock is equipped with the recess, and the recess is used for holding the support body, the outer concave curved surface of potsherd constitutes the friction pair with the outer surface contact of bulb. The ceramic plates distributed on the inner side of the backing replace an integral ceramic lining with large thickness, so that the overall wall thickness of the artificial shoulder joint is reduced, the diameter of the humeral ball head is increased, and the motion range of the artificial shoulder joint is enlarged; the ceramic wafer is fixed on the inner side of the backing through the high polymer, the ceramic wafer is fixed reliably and stably, the processing precision of the ceramic wafer and the inner side of the backing is reduced, the processing technology is reduced, the cost is reduced, and the ceramic wafer has certain impact resistance and noise reduction effect.
Description
Technical Field
The utility model relates to the technical field of implant prostheses in the department of orthopedics in biomedical engineering, in particular to an artificial shoulder joint.
Background
Artificial shoulder replacement is an effective clinical treatment for shoulder joint injury caused by trauma or disease. A conventional artificial shoulder joint consists of a humeral prosthesis, including a humeral stem and a humeral ball head, and a backing. The common backing material is metal or high molecular material or ceramic, the humeral head material is metal or ceramic, and the humeral head and the backing material are contacted to form a pair of friction pairs.
The artificial shoulder joints used clinically at present are of the following types: 1. the metal humerus ball head and the metal backing matching pair form a friction pair, toxic metal ions are separated out in the long-term friction and abrasion process, the toxic metal ions are accumulated to a certain concentration in a human body to cause chronic lesion, and meanwhile, abrasion debris can induce bone tissues around the prosthesis to generate osteolysis; 2. the metal or ceramic humerus ball head and the polymer backing are matched, a friction pair formed by the matching pair enables the wear rate of the polymer lining to be high, the most commonly used polymer material is ultra-high molecular weight polyethylene, the annual wear loss is about 0.2mm, the thickness of the polymer backing can be continuously reduced in a long-term friction process, the strength of the lining is further influenced, the artificial joint system generates the contradiction between the large movement range and the mechanical strength of the joint, in order to solve the contradiction, the thickness of the backing must be thickened, the diameter of the ball head matched with the backing is inevitably reduced, the movement range of the joint system can be reduced, the joint can be dislocated, and the failure is caused; 3. the friction pair formed by the ceramic humeral ball head and the ceramic backing pair has the advantages of minimal abrasion, inertia and good biocompatibility, so that the ceramic becomes the first choice for the ceramic artificial shoulder joint system in clinical use at present. However, because of the inherent brittleness of the ceramic material, if the thickness is thin, the fracture is easy to cause, and in order to overcome the defect, the thickness of the ceramic backing must be thickened, but the problem that the size of the ceramic humeral ball head matched with the ceramic backing must be reduced is caused, so that the movement range of the artificial shoulder joint is limited, and the joint dislocation is caused, and the artificial joint fails.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model aims to solve the technical problem that an artificial shoulder joint is provided to reach the wearing and tearing that reduce back of the body and humerus bulb, reduce the cracked risk of pottery, reduce the metal ion release, increase artificial shoulder joint motion range, extension artificial shoulder joint life's purpose.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
the artificial shoulder joint comprises a humerus ball head and a backing connected to a scapula, and further comprises a ceramic sheet and a supporting body, wherein the ceramic sheet is a group of ceramic sheets, the group of ceramic sheets are dispersedly arranged on the supporting body, a groove is formed in the inner side of the backing and used for accommodating the supporting body, and an outer concave curved surface of the ceramic sheet is in contact with the outer surface of the ball head to form a friction pair.
Preferably, the outer concave curved surfaces of the group of ceramic plates are in the same curved surface.
Preferably, the outer surface of the humeral ball head is provided with a group of pits for storing body fluid.
Preferably, the set of ceramic plates are non-uniformly spaced.
Preferably, the support is a high molecular polymer, and the outer surface of the high molecular polymer is lower than the outer concave curved surface of the ceramic sheet.
Preferably, the group of ceramic plates may be in the shape of a cylinder and/or a polygonal column.
Preferably, the humeral head and the backing can be titanium and its alloy or tantalum and its alloy or medical stainless steel or cobalt-chromium alloy, and the ceramic sheet is biological ceramic.
Preferably, the contact surfaces of the backing and the humeral head with the host bone are provided with a group of holes which are suitable for human tissue growth, convenient for biological connection and enhanced clinical long-term connection effect.
Preferably, the outer peripheral surface of the connecting part of the ceramic plate and the high molecular polymer is provided with grooves or bulges.
Preferably, the grooves on the ceramic plate are spiral grooves.
Compared with the prior art, the utility model, have following advantage:
the utility model has the advantages that the inner side of the spherical back lining is dispersedly provided with a plurality of ceramic plates to replace the integral ceramic lining with large thickness, thereby reducing the integral wall thickness of the artificial shoulder joint and improving the diameter of the humeral ball head, thereby increasing the motion range of the artificial shoulder joint; the ceramic plates are arranged dispersedly, so that the pressure born by a single ceramic cylinder is reduced, and the problem of cracking of the integral ceramic lining is solved; the mass of the shoulder joint is reduced, so that the patient can move more lightly; the surface of the humeral ball head is provided with the micro pits for storing lubricating body fluid, and meanwhile, the gaps are formed among the ceramic plates and can contain the lubricating body fluid, so that the abrasion loss of the humeral ball head and the ceramic plates is reduced, the metal ion precipitation is reduced, and the service life is prolonged; the ceramic wafer is fixed on the inner side of the backing through the high polymer, the ceramic wafer is fixed reliably and stably, the processing precision of the ceramic wafer and the inner side of the backing is reduced, the processing technology is reduced, the cost is reduced, and the ceramic wafer has certain impact resistance and noise reduction effect.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
fig. 1 is a schematic view of the artificial shoulder joint of the present invention.
Fig. 2 is a schematic view of the explosion of the artificial shoulder joint of the present invention.
Fig. 3 is a second schematic diagram of the explosion of the artificial shoulder joint of the present invention.
Fig. 4 is a third schematic view of the explosion of the artificial shoulder joint of the present invention.
In the figure: 1. humerus head, 101 pit, 2 scapula, 3 backing, 4 bracket, 5 ceramic plate.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.
The artificial shoulder joint comprises a humerus ball head and a backing connected to a scapula (host bone), wherein the outer surface of the humerus ball head corresponds to the inner side of the backing, the backing is a metal spherical cap-shaped backing, the humerus ball head can be a metal or ceramic ball head, ceramic plates for reducing friction between the inner side of the backing or the outer surface of the humerus ball head are arranged on the inner side of the backing or on the outer surface of the humerus ball head, the ceramic plates are in a group, and the ceramic plates are arranged in a dispersed manner; specifically, a group of ceramic plates are arranged at non-uniform intervals, and the non-uniform intervals can increase the contact area, so that the contact stress is reduced.
Wherein, the contact surfaces of the humeral ball head and the backing and the host bone are provided with a group of holes which are suitable for the growth of human tissues, convenient for biological connection and enhanced clinical long-term connection effect, and the group of holes is a group of micropores; the micropores can make bone tissues grow into the micropores, strengthen the connection between the joints and host bones of the human body, improve the fixing reliability of the prosthesis in the human body and ensure the use effect.
The present invention is described in detail below with reference to specific embodiments, which are as follows:
as shown in fig. 1 to 4, the artificial shoulder joint includes a humerus ball head 1 and a backing 3 disposed on a scapula 2, a group of ceramic plates 5 for reducing surface wear of the backing and the humerus ball head are disposed on the inner side of the backing 3, specifically, a groove is disposed on the inner side of the backing 3, a support body is disposed in the groove, the support body is made of a high polymer, the group of ceramic plates are all embedded on the high polymer, and an outer concave curved surface of the ceramic plates contacts with an outer surface of the humerus ball head to form a friction pair. Wherein, the backing and the humerus ball head can be titanium and alloy thereof or tantalum and alloy thereof or medical stainless steel or cobalt-chromium alloy, and the ceramic sheet is biological ceramic.
The ceramic wafer is fixed on the inner side of the backing through the high polymer, the ceramic wafer is fixed reliably and stably, the processing precision of the ceramic wafer and the inner side of the backing is reduced, the processing technology is reduced, the cost is reduced, and the ceramic wafer has certain impact resistance and noise reduction effect.
The shapes of the group of ceramic plates can be both cylinders or polygonal columns, or the shapes of the group of ceramic plates are the combination of the cylinders and the polygonal columns, the group of ceramic plates are arranged at non-uniform intervals, the outer end surfaces of the group of ceramic plates are positioned on the same spherical surface, and the contact area between the outer end surfaces of the group of ceramic plates and the surface of the ball head is increased. And the outer concave curved surfaces of the ceramic plates are positioned on the same curved surface, so that the stress is uniform, stable and reliable. The ceramic plates distributed on the inner side of the spherical-cap-shaped backing replace an integral ceramic lining with large thickness, so that the overall wall thickness of the artificial shoulder joint is reduced, the diameter of the ball head is increased, and the movement range of the artificial shoulder joint is enlarged.
The surface of the humeral ball head is provided with a group of pits 101 for storing body fluid of a human body, and the group of pits is a group of micro pits for storing the body fluid of the human body, lubricating the contact surface of the humeral ball head and the ceramic plate and reducing the friction between the humeral ball head and the ceramic plate. And the surface of the high molecular polymer is lower than the outer concave curved surface of the ceramic plate, a certain gap is formed between the adjacent ceramic plates, the gap can be used for storing body fluid of a human body, the contact surface of the ceramic plate and the humeral ball head is lubricated, the friction between the ceramic plate and the humeral ball head is reduced, the abrasion between the ceramic plate and the humeral ball head is small, and the service life is long.
The peripheral surface of the part of the ceramic chip connected with the high molecular polymer is provided with a groove or a bulge, and the groove on the ceramic chip is a spiral groove; the high molecular polymer is embedded in the groove, so that the pull-out force and the binding force of the ceramic chip are increased, and the ceramic chip is reliably fixed. Or, the periphery of the connecting part of the ceramic plate and the high molecular polymer is provided with a convex spiral rib, and the same fixing effect can be achieved.
A group of ceramic wafer passes through high-molecular polymer to be fixed in the inboard of backing, has the buffer between the bottom of ceramic wafer and the backing, avoids ceramic wafer and backing hard contact, can cushion the effort of upper arm bone bulb to the ceramic wafer, and the ceramic wafer is difficult cracked.
The artificial shoulder joint may have the structure including one notch in the surface of the humerus ball head, one support body of high molecular polymer embedded with one ceramic sheet, and one friction pair comprising one outer curved surface of the ceramic sheet and the inner side surface of the back. The peripheral surface of the part of the ceramic chip connected with the high molecular polymer is provided with a spiral groove, and the high molecular polymer is embedded in the spiral groove, so that the pull-out force and the binding force of the ceramic chip are increased; the inner side of the backing contacts the outer end of a set of ceramic wafers.
Or the ceramic wafer is fixed on the inner side of the backing through the support 4, the support is made of metal, the support is provided with a fixing hole for fixing the ceramic wafer, the ceramic wafer is of a structure with one large end and the other small end, the small end of the ceramic wafer penetrates through the fixing hole, and the support is welded with the backing.
The present invention has been described in detail with reference to the accompanying drawings, and it is apparent that the present invention is not limited by the above embodiments, and various insubstantial improvements can be made without modification to the present invention.
Claims (10)
1. An artificial shoulder joint, comprising a humeral ball head and a backing connected to a scapula, characterized in that: the ball head is characterized by further comprising a ceramic plate and a supporting body, wherein the ceramic plate is a group of ceramic plates, the ceramic plates are dispersedly arranged on the supporting body, a groove is formed in the inner side of the backing and used for accommodating the supporting body, and an outer concave curved surface of the ceramic plate is in contact with the outer surface of the ball head to form a friction pair.
2. The artificial shoulder joint of claim 1, wherein: the outer concave curved surfaces of the group of ceramic plates are positioned on the same curved surface.
3. The artificial shoulder joint of claim 1, wherein: the outer surface of the humerus ball head is provided with a group of pits for storing body fluid of a human body.
4. The artificial shoulder joint of claim 1, wherein: the group of ceramic plates are arranged at non-uniform intervals.
5. The artificial shoulder joint of claim 1, wherein: the supporting body is made of high molecular polymer, and the outer surface of the high molecular polymer is lower than the outer concave curved surface of the ceramic chip.
6. The artificial shoulder joint of claim 1, wherein: the group of ceramic plates may be cylindrical and/or polygonal in shape.
7. The artificial shoulder joint of claim 1, wherein: the humeral head and the backing can be titanium and its alloy or tantalum and its alloy or medical stainless steel or cobalt-chromium alloy, and the ceramic plate is biological ceramic.
8. The artificial shoulder joint of claim 1, wherein: the contact surfaces of the backing and the humeral head and the host bone are provided with a group of holes which are suitable for the growth of human tissues, convenient for biological connection and enhanced clinical long-term connection effect.
9. The artificial shoulder joint of claim 5, wherein: grooves or bulges are arranged on the peripheral surface of the connecting part of the ceramic chip and the high molecular polymer.
10. The artificial shoulder joint of claim 9, wherein: the grooves on the ceramic plate are spiral grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920259832.3U CN209808651U (en) | 2019-03-01 | 2019-03-01 | Artificial shoulder joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920259832.3U CN209808651U (en) | 2019-03-01 | 2019-03-01 | Artificial shoulder joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209808651U true CN209808651U (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920259832.3U Active CN209808651U (en) | 2019-03-01 | 2019-03-01 | Artificial shoulder joint |
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| CN (1) | CN209808651U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109662814A (en) * | 2019-03-01 | 2019-04-23 | 安徽工程大学 | A kind of artificial shoulder joint |
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2019
- 2019-03-01 CN CN201920259832.3U patent/CN209808651U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109662814A (en) * | 2019-03-01 | 2019-04-23 | 安徽工程大学 | A kind of artificial shoulder joint |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220513 Address after: 241000 218, building 1, commercial service center, Jiujiang Economic Development Zone, Wuhu District, China (Anhui) pilot Free Trade Zone, Wuhu City, Anhui Province Patentee after: Wuhu Tuogu Robot Technology Co.,Ltd. Address before: 241000 No. 8 Beijing Middle Road, Jiujiang District, Wuhu City, Anhui Province Patentee before: ANHUI POLYTECHNIC University |
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| TR01 | Transfer of patent right |