CN219921290U - Assembled prosthesis for repairing large tuberosity of hip joint - Google Patents
Assembled prosthesis for repairing large tuberosity of hip joint Download PDFInfo
- Publication number
- CN219921290U CN219921290U CN202320590353.6U CN202320590353U CN219921290U CN 219921290 U CN219921290 U CN 219921290U CN 202320590353 U CN202320590353 U CN 202320590353U CN 219921290 U CN219921290 U CN 219921290U
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- China
- Prior art keywords
- femoral stem
- sleeve
- tuberosity
- hip joint
- proximal end
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- 210000004394 hip joint Anatomy 0.000 title claims abstract description 26
- 238000005452 bending Methods 0.000 claims abstract description 7
- 210000001624 hip Anatomy 0.000 claims description 4
- 238000004378 air conditioning Methods 0.000 claims description 2
- 210000000527 greater trochanter Anatomy 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 22
- 210000000988 bone and bone Anatomy 0.000 abstract description 15
- 210000000689 upper leg Anatomy 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 210000003205 muscle Anatomy 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- 230000008602 contraction Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 210000002435 tendon Anatomy 0.000 description 2
- 210000000588 acetabulum Anatomy 0.000 description 1
- 239000002639 bone cement Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001054 cortical effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
Abstract
The utility model discloses a combined prosthesis for repairing a tuberosity of a hip joint, which comprises the following components: the proximal end of the first femoral stem is bent inwards to form a bent section, the proximal end of the bent section is connected with a femoral head, and the distal end of the first femoral stem is connected with the proximal end of the second femoral stem; the sleeve comprises a sleeve part and a protruding part, the sleeve part is of a hollow tubular structure and is sleeved on the non-bending section of the first femur handle; the protruding portion protrudes outward from the side wall of the sleeve portion. According to the assembled prosthesis for repairing the tuberosity of the hip joint, provided by the utility model, the tuberosity defect is filled through the sleeve sleeved on the femoral stem, so that the filling of the tuberosity defect is realized, the eccentric distance of the proximal end of the femur is recovered immediately, the arm of force of abductor muscles is increased, the installation is convenient, and the design of multiple holes on the surface is beneficial to bone ingrowth and the long-term effect is ensured.
Description
Technical Field
The utility model belongs to the field of medical appliances, and particularly relates to a combined prosthesis for repairing a large tuberosity of a hip joint.
Background
The main reasons of artificial hip joint revision include aseptic loosening of the prosthesis, infection, and bone dissolution around the prosthesis caused by worn debris, wherein the revision of the hip joint caused by the bone dissolution around the prosthesis is the most complex, and bone damage caused by worn debris has a wide range, as shown in fig. 1, not only can damage bone around the acetabulum, but also can damage the proximal end of the femur, so that serious bone defect at the proximal tuberosity of the femur (the area surrounded by the broken line in the figure is the tuberosity defect) is caused, and the risk and difficulty of revision operations are greatly increased.
For bone defect at proximal femur tuberosity in hip revision surgery, different treatment measures can be taken according to the range and size of the defect. The smaller bone defect can be filled by bone cement under the condition of not affecting the stability of the femoral stem revision; when the defect is larger, a method of cutting bone at the proximal end of the femur can be adopted, and the intramedullary canal contraction technology is utilized, so that the stability of the femoral stem can be ensured, and the bone defect can be treated. However, the technique of contraction has its own drawbacks, and when the defect range is too large, the technique of contraction can reduce the arm of force of the abductor, increase the work done by the abductor, and cause weakness or limitation of joint movement. As shown in figure 2, after the large tuberosity defect is treated by the contraction technique, the abduction arm of the hip joint can be obviously reduced after the operation, and the movement of the hip joint after the operation can be influenced to a certain extent.
Disclosure of Invention
The utility model aims to provide a combined prosthesis capable of filling bone defects at a tuberosity.
In order to achieve the above object, the present utility model provides a modular prosthesis for repairing a tuberosity of a hip joint, comprising:
the proximal end of the first femoral stem is bent inwards to form a bent section, the proximal end of the bent section is connected with a femoral head, and the distal end of the first femoral stem is connected with the proximal end of the second femoral stem; a kind of electronic device with high-pressure air-conditioning system
The sleeve comprises a sleeve part and a protruding part, wherein the sleeve part is of a hollow tubular structure and is sleeved on the non-bending section of the first femoral stem; the protruding portion protrudes outward from the side wall of the sleeve portion.
Optionally, the first femoral stem is detachably connected to the second femoral stem, and the sleeve is detachably connected to the femoral stem.
Optionally, at least two through holes are formed on the protruding part so as to pass through the steel wire or tendon line.
Optionally, the sleeve portion and the protruding portion are integrally formed.
Optionally, the surface of the sleeve is a rough porous structure.
Optionally, a groove is formed in the inner surface of the hollow part of the sleeving part, a protrusion is arranged on the outer surface of the first femoral stem, and the groove is matched with the protrusion, so that the sleeve is connected with the first femoral stem.
Optionally, the proximal end of the second femoral stem is cannulated into the distal end of the first femoral stem.
Optionally, the outer surface of the second femoral stem is provided with a plurality of ribs, and each rib is arranged along the length direction of the second femoral stem.
Optionally, the outer surface of the second femoral stem is a blasted surface.
The utility model has the technical effects that:
(1) According to the assembled prosthesis for repairing the tuberosity of the hip joint, provided by the utility model, the tuberosity defect is filled through the sleeve sleeved on the femoral stem, so that the filling of the tuberosity defect is realized, the eccentric distance of the proximal end of the femur is recovered immediately, and the arm of force of abductor is increased.
(2) The prosthesis is of a combined structure, a second femoral stem can be firstly installed, then a sleeve is installed, and finally a first femoral stem is installed, so that the prosthesis is convenient to install in a small operation space at a hip joint.
(3) The prosthesis is formed by detachably connecting the first femoral stem, the second femoral stem and the sleeve, can select structures with different sizes to match patients with different heights and different large tuberosity defects, is personalized and customized, and is more convenient to use and lower in cost compared with an integral prosthesis.
Drawings
Fig. 1 is a schematic representation of a human tuberosity defect.
FIG. 2 is a schematic representation of treatment of large tuberosity defects using a reduction technique.
Fig. 3 is a schematic structural view of a modular prosthesis for repairing a tuberosity of a hip joint according to the present utility model.
Fig. 4 is a schematic diagram of a sleeve of a modular prosthesis for repairing a tuberosity of a hip joint according to the present utility model.
Fig. 5 is a cross-sectional view of a second femoral stem of the assembled prosthesis for use in the repair of a tuberosity of a hip joint provided by the present utility model.
In the figure, 1-femoral stem, 11-first femoral stem, 111-curved section, 112-non-curved section, 12-second femoral stem, 120-convex rib, 2-sleeve, 21-sleeve portion, 22-protruding portion, 220-through hole, 3-femoral head.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, the terms "inner side" and "outer side" are used with reference to the human body, and the side close to the human body is the "inner side" and the side far from the human body is the "outer side". The terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, 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, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; 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 utility model will be understood in specific cases by those of ordinary skill in the art.
Fig. 3 is a block prosthesis for repairing a tuberosity of a hip joint according to the present utility model, which is mounted to a left hip joint of a human body in the direction shown in fig. 3. After the assembled prosthesis of fig. 3 is horizontally mirror-symmetrical, the assembled prosthesis is mounted on the right hip joint of the human body. The assembled prosthesis comprises a femoral stem 1 and a sleeve 2. The femoral stem 1 comprises a first femoral stem 11 and a second femoral stem 12, wherein the proximal end of the first femoral stem 11 is bent inwards to form a bending section 111, the proximal end of the bending section 111 is connected with the femoral head 3, and the distal end of the first femoral stem 11 is connected with the proximal end of the second femoral stem 12.
As shown in fig. 4, the sleeve 2 is used for filling the tuberosity defect, and comprises a sleeving part 21 and a protruding part 22, wherein the sleeving part 21 is of a hollow tubular structure and is sleeved on the non-bending section 112 of the first femoral stem 11; the protruding portion 22 protrudes outward from the side wall of the fitting portion 21. The surface of the sleeve 2 is of a rough porous structure, and the sleeve is beneficial to later bone ingrowth after being implanted into a body, so that biological fixation is realized.
Because of the small operable space at the hip joint of the human body, the integrated femoral prosthesis is difficult to install. In the present utility model, the sleeve 2 is detachably connected to the femoral stem 1, and the first femoral stem 11 is detachably connected to the second femoral stem 12. Therefore, before the prosthesis is installed, the region of the intramedullary canal where the prosthesis is to be installed is polished, the sleeve 2 is firstly installed corresponding to the defect of the tuberosity, then the first femoral stem 11 is connected with the second femoral stem 12, and the hollow part of the sleeve 2 is inserted into the sleeve 2, so that the sleeve part 21 of the sleeve 2 is sleeved on the non-bending section 112 of the first femoral stem 1. In addition, the assembled prosthesis is convenient for personalized design according to the actual condition of the patient. The first femoral stem 11, the second femoral stem 12 and the sleeve 2 can be designed in different sizes, respectively, and the doctor combines the structures in different sizes with each other according to the actual situation of the patient. For example, if some patients have small children and large bone defects, a smaller femoral stem 1 and a larger sleeve 2 may be selected. The integrated femoral prosthesis is difficult to customize individually according to the physical characteristics of the patient.
In some embodiments, the distal end of the first femoral stem 11 is provided with a hole to accommodate insertion of the proximal end of the second femoral stem 12, enabling insertion of the proximal end of the second femoral stem 12 into the distal end of the first femoral stem 11. Optionally, the proximal end of the second femoral stem 12 includes a taper, and the bore at the distal end of the first femoral stem 11 is a tapered bore that is equal to the proximal outer diameter taper of the second femoral stem 12, which are fixedly connected by a taper.
In some embodiments, the sleeve 2 and the first femoral stem 11 are coupled by a male-female fit. The inner surface of the hollow part of the sleeve portion 21 is provided with a groove, the outer surface of the first femoral stem 11 is provided with a protrusion, the groove is matched with the protrusion, after the first femoral stem 11 is sleeved into the sleeve, the protrusion and the recess are mutually embedded, so that the sleeve 2 is connected with the first femoral stem 11, and the sleeve 2 and the first femoral stem 11 are kept stable in the axial direction.
In some embodiments, the sleeve portion 21 and the protruding portion 22 are integrally formed, so that the structure of the sleeve 2 is more stable. At least two through holes 220 are formed in the protruding portion 22 to pass through the steel wire or tendon line, so as to strengthen the fixing strength of the oversleeve 2 and the greater tuberosity.
In some embodiments, the outer surface of the second femoral stem 12 is a blasted surface. As shown in fig. 3 and 5, the outer surface of the second femoral stem 12 is further provided with a plurality of ribs 120, and each rib 120 is disposed along the length direction of the second femoral stem 12. The second femoral stem 12 is designed as a multi-faceted cylinder with a sandblasted surface to facilitate fixation with the cortical bone of the distal femoral isthmus for rotational stability.
In summary, the assembled prosthesis for repairing the tuberosity of the hip joint provided by the utility model fills the tuberosity defect through the sleeve sleeved on the femoral stem, so that not only is the filling of the tuberosity defect realized, but also the eccentric distance of the proximal end of the femur is recovered immediately, the arm of force of abductor muscles is increased, the installation is convenient, and the design of the surface multiple holes is beneficial to bone ingrowth and also ensures the long-term effect.
While the present utility model has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the utility model. Many modifications and substitutions of the present utility model will become apparent to those of ordinary skill in the art upon reading the foregoing. Accordingly, the scope of the utility model should be limited only by the attached claims.
Claims (9)
1. A modular prosthesis for the repair of a greater tuberosity of a hip joint, comprising:
the proximal end of the first femoral stem is bent inwards to form a bent section, the proximal end of the bent section is connected with a femoral head, and the distal end of the first femoral stem is connected with the proximal end of the second femoral stem; a kind of electronic device with high-pressure air-conditioning system
The sleeve comprises a sleeve part and a protruding part, wherein the sleeve part is of a hollow tubular structure and is sleeved on the non-bending section of the first femoral stem; the protruding portion protrudes outward from the side wall of the sleeve portion.
2. The modular prosthesis for use in a tuberosity repair of a hip joint of claim 1 wherein said first femoral stem is removably coupled to said second femoral stem and said sleeve is removably coupled to said femoral stem.
3. The modular prosthesis for the repair of the greater tuberosity of the hip of claim 1 wherein said projection is provided with at least two through holes for passing through a wire or tendinous wire.
4. The modular prosthesis for use in the repair of the greater tuberosity of the hip of claim 1 wherein said sleeve and said tab are integrally formed.
5. The modular prosthesis for the repair of the greater tuberosity of the hip of claim 1 wherein the surface of said sleeve is a rough porous structure.
6. The assembled prosthesis for the repair of the greater trochanter of the hip joint of claim 1, wherein the inner surface of the cannulation of the sleeve portion is provided with a recess, the outer surface of the first femoral stem is provided with a protrusion, and the recess and the protrusion are adapted to connect the sleeve to the first femoral stem.
7. The modular prosthesis for use in a tuberosity repair of a hip joint according to claim 1 wherein a proximal end of said second femoral stem is inserted into a distal end of said first femoral stem.
8. The modular prosthesis for use in a tuberosity repair of a hip joint according to claim 1 wherein said outer surface of said second femoral stem is provided with a plurality of fins, each of said fins being disposed along the length of said second femoral stem.
9. The modular prosthesis for use in a tuberosity repair of a hip joint according to claim 1 wherein an outer surface of said second femoral stem is a blasted surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320590353.6U CN219921290U (en) | 2023-03-23 | 2023-03-23 | Assembled prosthesis for repairing large tuberosity of hip joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320590353.6U CN219921290U (en) | 2023-03-23 | 2023-03-23 | Assembled prosthesis for repairing large tuberosity of hip joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219921290U true CN219921290U (en) | 2023-10-31 |
Family
ID=88489871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320590353.6U Active CN219921290U (en) | 2023-03-23 | 2023-03-23 | Assembled prosthesis for repairing large tuberosity of hip joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219921290U (en) |
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2023
- 2023-03-23 CN CN202320590353.6U patent/CN219921290U/en active Active
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