CN210962459U - Surface hip joint prosthesis - Google Patents
Surface hip joint prosthesis Download PDFInfo
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- CN210962459U CN210962459U CN201921081031.9U CN201921081031U CN210962459U CN 210962459 U CN210962459 U CN 210962459U CN 201921081031 U CN201921081031 U CN 201921081031U CN 210962459 U CN210962459 U CN 210962459U
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Abstract
The utility model relates to the field of medical equipment, a surface hip joint prosthesis is disclosed. The surface hip prosthesis comprises: the femoral head prosthesis comprises a femoral head and a fixing part, wherein the femoral head is sleeved on the outer surface of the femoral head of a human body, the fixing part is connected with the femoral head and is implanted into the femoral head of the human body, a first anti-rotation groove is formed in the inner surface, matched with the outer surface of the femoral head of the human body, of the femoral head, and/or a second anti-rotation groove is formed in the outer surface of the fixing part. The surface hip joint prosthesis of the utility model can ensure the joint function and stability of the surface hip joint prosthesis under the condition of long-term use.
Description
Technical Field
The utility model relates to the field of medical equipment, concretely relates to surface hip joint prosthesis.
Background
Surface hip prostheses are surgical implants used to replace parts of the human hip joint. Is used for the surface replacement operation of the hip joint. The surface hip joint prosthesis mainly comprises an acetabulum outer cup prosthesis and a femoral head prosthesis which is sleeved in the acetabulum outer cup prosthesis and is used for being matched with the femoral head of a human body. The surface hip replacement can effectively reduce the repair rate and the failure rate after the hip replacement, and prolong the service life of the prosthesis.
There are also a number of disadvantages associated with existing surface hip prostheses. For example, the contact surfaces of the acetabular cup prosthesis and the femoral head prosthesis of the conventional surface hip joint prosthesis are metal surfaces, the friction force of the two metal surfaces is far greater than that of the normal joint surfaces of a human body, fine metal particles are generated by friction of the two metal surfaces, the metal particles exist between the two metal surfaces, the relative motion of the acetabular cup prosthesis and the femoral head prosthesis is influenced, the phenomenon of locking of the joint surfaces of the prostheses occurs, and the motion failure of the prosthesis is caused by the loss of the rotation function between the acetabular cup prosthesis and the femoral head prosthesis. In addition, the spherical inner surface (for sleeving the outer surface of the femoral head of the human body) and the outer surface of the fixed shaft (for fixing with the femoral head of the human body) of the existing femoral head prosthesis are both smooth surfaces, and after the femoral head prosthesis is implanted, the spherical inner surface of the femoral head prosthesis and the femoral head of the human body, and the outer surface of the fixed shaft and the inner part of the femoral head of the human body may rotate relatively, so that the femoral head prosthesis is loosened or dislocated.
In response to the deficiencies of the prior art, it would be desirable to those skilled in the art to find a surface hip prosthesis that ensures proper joint function and stability over extended periods of use.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a surface hip joint prosthesis which can ensure the joint function and the stability of the surface hip joint prosthesis under the condition of long-term use.
According to the utility model discloses a surface hip joint prosthesis, include: the femoral head prosthesis comprises a femoral head and a fixing part, wherein the femoral head is sleeved on the outer surface of the femoral head of a human body, the fixing part is connected with the femoral head and is implanted into the femoral head of the human body, a first anti-rotation groove is formed in the inner surface, matched with the outer surface of the femoral head of the human body, of the femoral head, and/or a second anti-rotation groove is formed in the outer surface of the fixing part.
Further, the first anti-rotation groove extends from the small-diameter end of the femoral head to the large-diameter end of the femoral head.
Furthermore, the number of the first anti-rotation grooves is multiple, and the first anti-rotation grooves are arranged at intervals.
Furthermore, a first annular groove is formed in the circumferential direction of the inner surface of the femoral head part, which is matched with the outer surface of the femoral head of the human body, and the first annular groove is intersected and communicated with the first anti-rotation grooves.
Further, the fixing portion is formed in a columnar shape, and the second rotation preventing groove extends in the axial direction of the fixing portion.
Preferably, the number of the second rotation preventing grooves is plural.
Further preferably, the second rotation preventing grooves are provided at equal intervals.
Still more preferably, a second annular groove is formed on the outer surface of the fixing portion and penetrates through each second rotation preventing groove.
Furthermore, the surface hip joint prosthesis also comprises an elastic lining sleeved on the outer surface of the head of the femur and a metal outer cup sleeved on the outer surface of the elastic lining, wherein a first groove is formed on the end surface of the large-diameter end of the metal outer cup, the first groove is communicated with the inner side of the metal outer cup, an elastic bulge matched with the first groove is formed on the outer peripheral surface of the elastic lining, and the elastic bulge on the elastic lining can be embedded into the first groove under the action of external force so as to prevent the elastic lining from falling out of the metal outer cup.
Preferably, the flexible liner is made of vitamin E stabilized cross-linked ultra high molecular weight polyethylene.
Furthermore, the number of the first grooves is multiple, and the first grooves are arranged on the end face of the large-diameter end of the metal outer cup at intervals.
Furthermore, a second groove is formed in the end face of the large-diameter end of the metal outer cup, and the second groove is communicated with the first groove and the outer side of the metal outer cup.
Preferably, the number of the second grooves may be multiple, preferably four, and the second grooves are distributed at equal intervals.
Furthermore, the inner peripheral surface of the large-diameter end of the metal outer cup is also provided with a positioning bulge, the end surface of the large-diameter end of the elastic lining is provided with a positioning groove matched with the positioning bulge, and the positioning groove is communicated with the outer side of the lining.
Furthermore, an operation hole used for being matched with an operation tool is formed in the top of the metal outer cup, and a fixing hole is formed in the outer peripheral wall of the metal outer cup.
Compared with the prior art, the surface hip joint prosthesis of the utility model has the following advantages:
1) the first anti-rotation groove is formed in the inner surface, matched with the outer surface of the femoral head of a human body, of the femoral head part, so that the femoral head prosthesis and the femoral head of the human body are prevented from rotating relatively, and the connection relation between the femoral head prosthesis and the femoral head of the human body is more stable.
2) The second anti-rotation groove is formed in the outer surface of the fixing part, so that the relative rotation phenomenon between the fixing part of the femoral head prosthesis and human femoral head hair is avoided, and the fixing part is separated from the human femoral head, so that the connection relation between the femoral head prosthesis and the human femoral head is more stable.
3) The end face of the large-diameter end of the metal outer cup is provided with the first groove, the outer peripheral face of the elastic lining is provided with the elastic bulge matched with the first groove, and therefore the elastic lining is prevented from being separated from the metal outer cup, and the connection relation between the elastic lining and the metal outer cup is stable.
4) The second groove which can be communicated with the first groove and the outer side of the metal outer cup simultaneously is arranged on the end face of the large-diameter end of the metal outer cup, so that the metal outer cup and the elastic lining can be detached more conveniently.
5) The inner peripheral surface of the large-diameter end of the metal outer cup is provided with the positioning protrusion, and the end surface of the large-diameter end of the elastic lining is provided with the positioning groove matched with the positioning protrusion, so that the elastic lining can be quickly and accurately installed and fixed with the metal outer cup, and meanwhile, the relative rotation between the elastic lining and the metal outer cup is also avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Figure 1 is a cross-sectional view of a surface hip prosthesis according to the invention;
fig. 2 is a cross-sectional view of the femoral head prosthesis shown in fig. 1;
FIG. 3 is a bottom view of the metal outer cup of FIG. 1;
FIG. 4 is a bottom view of the flexible liner of FIG. 1;
fig. 5 is a schematic view of the femoral head prosthesis shown in fig. 1.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
Fig. 1 shows a cross-sectional view of a surface hip prosthesis 100 according to the invention. As shown in fig. 1, the surface hip prosthesis 100 comprises: as shown in fig. 2, the femoral head prosthesis 1 includes a femoral head 11 for being sleeved on an outer surface of a femoral head of a human body and a fixing part 12 connected to the femoral head 11 and for being implanted into the femoral head of the human body, and as shown in fig. 5, a first anti-rotation groove 131 is formed on an inner surface of the femoral head 11 which is matched with the outer surface of the femoral head of the human body and/or a second anti-rotation groove 132 is formed on an outer surface of the fixing part. When the surface hip joint prosthesis 100 of the present invention is installed, the fixing portion 12 of the femoral head prosthesis 1 is inserted into the bone inside the femoral head of the human body to fix the fixing portion 12 on the femoral head of the human body, and the femoral head 11 is sleeved on the outer surface of the femoral head of the human body. Wherein, bone cement can be filled between the femoral head 11 and the outer surface of the human femoral head, and between the fixing part 12 and the inner part of the human femoral head. The utility model discloses a form first anti-rotation groove 131 and/or be formed with the second on the surface matched with internal surface of the femoral head of human body of femoral head 11 and/or on the surface of fixed part 12 and prevent rotating groove 132, make bone cement can get into first anti-rotation groove and second when filling and prevent rotating groove 132, under the combined action of first anti-rotation groove and/or second anti-rotation groove and bone cement, avoided effectively between the surface of femoral head 11 and human femoral head, and fixed part 12 and the inside relative rotation between the human femoral head, make femoral head prosthesis 1 and the difficult not hard up of fixed connection of human femoral head, thereby the stability of prosthetic femoral head 1 after fixing has been guaranteed fully. In addition, the second anti-rotation groove 132 formed on the outer surface of the fixing portion 12 can effectively prevent the fixing portion 12 from falling out of the femoral head of the human body, thereby further improving the stability of the fixation between the femoral head prosthesis 1 and the femoral head of the human body and contributing to the prolonging of the service life of the surface hip joint prosthesis 100.
In the preferred embodiment shown in fig. 2, the first anti-rotation slot 131 is configured to extend from the small diameter end of the femoral head 11 to the large diameter end of the femoral head 12. This arrangement increases the length of the first rotation preventing groove 131 on the one hand, thereby providing resistance perpendicular to the rotation direction thereof over the entire length of the first rotation preventing groove 131, thereby improving the rotation resistance of the femoral head 11; on the other hand, the excess bone cement filled between the femoral head 11 and the outer surface of the human femoral head can be squeezed out from the opening end of the first rotation preventing groove 131.
Preferably, in order to further improve the rotation resistance of the femoral head 11, the first rotation preventing grooves 131 may be provided in a plurality at intervals as shown in fig. 2. Further preferably, the first rotation preventing grooves 131 may be disposed at equal intervals. Through this setting make the atress of each part structure of thighbone head 11 more even, help improving thighbone head self structure and fixed stability under the effect of received the rotation force.
In a preferred embodiment, as shown in fig. 2, the inner surface of the femoral head 11, which is matched with the outer surface of the femoral head of the human body, may further be formed with a first annular groove 141 in the circumferential direction, and the first annular groove 141 is simultaneously intersected and communicated with each first anti-rotation groove 131. By the arrangement, the femoral head 11 is not easy to be longitudinally separated from the femoral head of the human body.
In a preferred embodiment as shown in fig. 2, the fixing part 12 may be formed in a cylindrical shape, and the second rotation preventing groove 132 may extend in an axial direction of the fixing part 12. With this arrangement, the cylindrical fixing portion 12 allows the fixing portion 12 to be easily inserted into the femoral head of a human body, and has a larger contact area with the inside of the femoral head, while the second anti-rotation groove 132 axially provided helps to better avoid the lateral rotation of the femoral head prosthesis 1 with respect to the femoral head of the human body.
Preferably, as shown in fig. 2, in order to further improve the rotation resistance of the fixing part 12, the number of the second rotation preventing grooves 132 may be provided in plurality. Preferably, the second anti-rotation grooves 132 may be disposed at equal intervals. Through the arrangement, stress of each part structure of the fixing part 12 is more uniform, and the structure and the fixing stability of the fixing part 12 under the action of rotating force are improved.
Further preferably, a second annular groove (not shown) may be formed on the outer surface of the fixing portion 12 while intersecting and communicating with each of the second rotation preventing grooves 132. The fixing part 12 is not easy to be longitudinally removed from the head of the femur of the human body through the arrangement.
According to the present invention, as shown in fig. 1, the surface hip joint prosthesis 100 may further include an elastic lining 3 covering the outer surface of the femoral head 11, and a metal outer cup 2 covering the outer surface of the elastic lining 3. As shown in fig. 3, a first groove 211 may be formed on an end surface of the large diameter end of the metal outer cup 2, the first groove 211 may be communicated with an inner side of the metal outer cup 2 (i.e., a side facing the inside of the metal outer cup 2), as shown in fig. 4, an elastic protrusion 311 matched with the first groove 211 may be formed on an outer circumferential surface of the elastic liner 3, and the elastic protrusion 311 on the elastic liner 3 may be embedded into the first groove 211 under an external force to prevent the elastic liner 3 from coming out of the metal outer cup 2. The elastic lining 3 sleeved on the outer surface of the femoral head 11 is arranged, so that the outer surface of the femoral head 11 is not directly contacted with the inner surface of the metal outer cup 2, and the phenomenon of locking between the metal outer cup 2 and the femoral head prosthesis 1 caused by abrasive particles generated by direct contact friction of two metal surfaces is avoided.
According to the utility model, the elastic lining 3 can be made of vitamin E stable cross-linked ultra-high molecular weight polyethylene. The elastic lining 3 made of the vitamin E stable cross-linked ultra-high molecular weight polyethylene is wear-resistant, and the service life of the surface hip prosthesis 100 can be still ensured when the inner surface of the elastic lining 3 is in contact friction with the outer surface of the femoral head prosthesis 1.
In a preferred embodiment, the number of the first recesses 211 may be plural, and each of the first recesses 211 may be spaced apart from each other on the end surface of the large diameter end of the metal outer cup 2. The connection of the metal outer cup 2 and the elastic inner lining 3 is more stable by the arrangement.
Further, a second groove 212 may be formed on an end surface of the large diameter end of the metal outer cup 2, and the second groove 212 may communicate with both the first groove 211 and the outside of the metal outer cup 2. This second recess 212 is provided to allow operating space for removing the flexible inner liner 3 from the metal cup 2 when required (e.g. requiring refurbishment), for example by means of a removal tool which can be inserted into the second recess 212 and pry the flexible inner liner 3 to disengage the flexible inner liner 3 from the metal cup 2.
Preferably, the number of the second grooves 212 may be multiple and distributed at equal intervals. This setting is convenient for operating personnel can dismantle flexible inside lining 3 in a plurality of directions to improve the flexibility of dismantling the operation. Preferably, the number of the second grooves 212 is four.
Furthermore, as shown in fig. 3, a positioning protrusion 22 may be further formed on the inner circumferential surface of the large diameter end of the metal outer cup 2, a positioning groove 32 matched with the positioning protrusion 22 is formed on the end surface of the large diameter end of the elastic liner 3, and the positioning groove 32 is communicated with the outer side of the liner 3. Through this setting can be convenient for elastic lining 3 accurately install fast and fixed with metal outer cup 2, also further avoided the relative rotation between elastic lining 3 and the metal outer cup 2 simultaneously.
According to the present invention, as shown in fig. 3, the top of the metal outer cup 2 can be formed with an operation hole 23 for cooperating with an operation tool, and the outer peripheral wall of the metal outer cup 2 can be formed with a fixing hole 24. The fixing holes 24 are formed in the peripheral wall of the metal outer cup 2, so that fixing nails can be nailed into the fixing holes 24 to fix the relative position relation between the metal outer cup 2 and the human acetabulum part, looseness of the metal outer cup 2 on the human acetabulum part is avoided, and the metal outer cup 2 and the human acetabulum part are flexibly fixed and operated by arranging the operation holes 23 in the top of the metal outer cup 2.
Compared with the prior art, the surface hip joint prosthesis 100 of the present invention has the following advantages:
1) the first anti-rotation groove 131 is formed in the inner surface, matched with the outer surface of the femoral head of the human body, of the femoral head 11, so that the relative rotation phenomenon between the femoral head prosthesis 1 and the femoral head of the human body is avoided, and the connection relation between the femoral head prosthesis 1 and the femoral head of the human body is more stable.
2) By arranging the second anti-rotation groove 132 on the outer surface of the fixing portion 12, the relative rotation between the fixing portion 12 of the femoral head prosthesis 1 and the human femoral head is avoided, and the fixing portion 12 is prevented from being pulled out of the human femoral head, so that the connection relationship between the femoral head prosthesis 1 and the human femoral head is more stable.
3) Through set up first recess 211 on the terminal surface of the major diameter end of metal outer cup 2 and set up the elastic bulge 311 with first recess 211 matched with on the outer peripheral face of elastic lining 3, thereby avoided elastic lining 2 to deviate from metal outer cup 3 and make the relation of connection between elastic lining 3 and metal outer cup 2 more stable.
4) The second groove 212 which can be simultaneously communicated with the first groove 211 and the outer side of the metal outer cup 2 is arranged on the end surface of the large-diameter end of the metal outer cup 2, so that the disassembly operation is more convenient when the metal outer cup 2 and the elastic lining 3 need to be disassembled.
5) The inner peripheral surface of the large-diameter end of the metal outer cup 2 is provided with the positioning protrusion 22, and the end surface of the large-diameter end of the elastic lining 3 is provided with the positioning groove 32 matched with the positioning protrusion 22, so that the elastic lining can be quickly and accurately installed and fixed with the metal outer cup, and meanwhile, the relative rotation between the elastic lining 3 and the metal outer cup 2 is also avoided.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. A surface hip prosthesis, comprising: the femoral head prosthesis comprises a femoral head and a fixing part, wherein the femoral head is sleeved on the outer surface of the femoral head of a human body, the fixing part is connected with the femoral head and is implanted into the femoral head of the human body, a first anti-rotation groove is formed in the inner surface, matched with the outer surface of the femoral head of the human body, of the femoral head, and/or a second anti-rotation groove is formed in the outer surface of the fixing part.
2. The surface hip prosthesis according to claim 1, wherein the first anti-rotation slot extends from the small diameter end of the femoral head to the large diameter end of the femoral head.
3. The surface hip prosthesis according to claim 2, wherein the number of the first rotation prevention grooves is plural, and each of the first rotation prevention grooves is provided at intervals.
4. The surface hip prosthesis according to claim 3, wherein the inner surface of the femoral head portion that is engaged with the outer surface of the femoral head of the human body is further formed with first annular grooves in the circumferential direction, and the first annular grooves are simultaneously intersected and communicated with the first anti-rotation grooves.
5. The surface hip prosthesis according to claim 1, wherein the anchoring portion is formed in a columnar shape, and the second rotation prevention groove extends in an axial direction of the anchoring portion.
6. The surface hip joint prosthesis according to any one of claims 1 to 5, further comprising an elastic lining sleeved on the outer surface of the femoral head, and a metal outer cup sleeved on the outer surface of the elastic lining, wherein a first groove is formed on the end surface of the large-diameter end of the metal outer cup, the first groove is communicated with the inner side of the metal outer cup, an elastic protrusion matched with the first groove is formed on the outer circumferential surface of the elastic lining, and the elastic protrusion on the elastic lining can be embedded into the first groove under the action of external force so as to prevent the elastic lining from falling out of the metal outer cup.
7. The surface hip prosthesis according to claim 6, wherein the number of the first recesses is plural, and each of the first recesses is provided at intervals on the end surface of the large diameter end of the metal outer cup.
8. The surface hip prosthesis according to claim 6, wherein a second groove is further formed on the end surface of the large diameter end of the metal outer cup, the second groove communicating with both the first groove and the outside of the metal outer cup.
9. The surface hip prosthesis according to claim 8, wherein the metal outer cup has a positioning protrusion formed on the inner peripheral surface of the large diameter end thereof, and the elastic liner has a positioning groove formed on the end surface of the large diameter end thereof for fitting with the positioning protrusion, the positioning groove communicating with the outside of the liner.
10. The surface hip prosthesis according to claim 6, wherein the top of the metal outer cup is further formed with an operation hole for use in cooperation with an operation tool, and the outer peripheral wall of the metal outer cup is further formed with a fixing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921081031.9U CN210962459U (en) | 2019-07-11 | 2019-07-11 | Surface hip joint prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921081031.9U CN210962459U (en) | 2019-07-11 | 2019-07-11 | Surface hip joint prosthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210962459U true CN210962459U (en) | 2020-07-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921081031.9U Active CN210962459U (en) | 2019-07-11 | 2019-07-11 | Surface hip joint prosthesis |
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| CN (1) | CN210962459U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110393611A (en) * | 2019-07-11 | 2019-11-01 | 北京市春立正达医疗器械股份有限公司 | Surface hip joint prosthese |
| CN116807694A (en) * | 2023-08-25 | 2023-09-29 | 北京爱康宜诚医疗器材有限公司 | Femoral head prosthetic prosthesis |
-
2019
- 2019-07-11 CN CN201921081031.9U patent/CN210962459U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110393611A (en) * | 2019-07-11 | 2019-11-01 | 北京市春立正达医疗器械股份有限公司 | Surface hip joint prosthese |
| CN116807694A (en) * | 2023-08-25 | 2023-09-29 | 北京爱康宜诚医疗器材有限公司 | Femoral head prosthetic prosthesis |
| CN116807694B (en) * | 2023-08-25 | 2023-12-19 | 北京爱康宜诚医疗器材有限公司 | Femoral head prosthetic prosthesis |
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