CN221060964U - Custom personalized semi-condylar prosthesis - Google Patents
Custom personalized semi-condylar prosthesis Download PDFInfo
- Publication number
- CN221060964U CN221060964U CN202321886327.4U CN202321886327U CN221060964U CN 221060964 U CN221060964 U CN 221060964U CN 202321886327 U CN202321886327 U CN 202321886327U CN 221060964 U CN221060964 U CN 221060964U
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- CN
- China
- Prior art keywords
- main body
- body structure
- prosthesis
- intramedullary pin
- semi
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- 210000000988 bone and bone Anatomy 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000010936 titanium Substances 0.000 claims abstract description 13
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 13
- 210000003041 ligament Anatomy 0.000 claims description 10
- 210000004439 collateral ligament Anatomy 0.000 claims description 7
- 230000000717 retained effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 6
- 208000015181 infectious disease Diseases 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 4
- 210000000845 cartilage Anatomy 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 210000000689 upper leg Anatomy 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 2
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 2
- 230000009193 crawling Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000013150 knee replacement Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 210000004872 soft tissue Anatomy 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 210000001264 anterior cruciate ligament Anatomy 0.000 description 1
- 230000008468 bone growth Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008407 joint function Effects 0.000 description 1
- 210000000629 knee joint Anatomy 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 210000002967 posterior cruciate ligament Anatomy 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 210000002303 tibia Anatomy 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Prostheses (AREA)
Abstract
The utility model discloses a customized individuation semi-condylar prosthesis, belonging to the technical field of medical prostheses; it includes a metal prosthesis and a joint face liner; the metal prosthesis mainly comprises a main body structure and an intramedullary pin, wherein the main body structure and the intramedullary pin are both of a bone trabecular structure; the intramedullary pin is positioned on the inner side of the main body structure, which is bonded with and retains bone, and the intramedullary pin and the main body structure are of an integrated structure; the top end of the intramedullary pin exceeds the top of the main body structure; the outer side surface of the main body structure is provided with titanium cable grooves which are arranged along the axial direction of the main body structure in an array manner; each main body section separated by the titanium cable groove is provided with a threaded hole perpendicular to the axis of the main body section. The utility model retains healthy bone, has a porous structure, greatly reduces the weight of the prosthesis and reduces the burden of patients.
Description
Technical Field
The utility model relates to the technical field of medical prostheses, in particular to a customized individual semi-condylar prosthesis.
Background
The knee joint is the main bearing joint of the human body, and is the joint with the largest human body and the most complex structure. The far-end unicondylar of the femur can cause a great deal of bone defects at the position due to infection, trauma, tumor and the like, and the operation repair reconstruction is needed. Compared with the total knee replacement operation, the unicondylar knee replacement operation reserves the anterior cruciate ligament and the posterior cruciate ligament, so that a patient can obtain better movement capability after the operation.
The existing unicondylar prosthesis only wraps the surface of the unicondylar at the far end of the femur, the repair and reconstruction after a large number of bone defects are difficult to meet, the prosthesis is not matched with the original bone form, and the accurate reconstruction is impossible.
In addition, the current unicondylar prosthesis and the distal femur are not ideal in connection and fixation effect, and the postoperative prosthesis is easy to break out and abrade, so that the operation is failed or the prosthesis is repaired.
Disclosure of utility model
It is an object of the present utility model to provide a custom-made personalized semi-condylar prosthesis. It retains healthy bone, has a porous structure, greatly reduces the weight of the prosthesis, and reduces the burden on the patient.
The aim of the utility model is achieved by the following technical scheme:
Customizing a personalized semi-condylar prosthesis, including a metal prosthesis and a articular surface liner; the metal prosthesis mainly comprises a main body structure and an intramedullary pin, wherein the main body structure and the intramedullary pin are both of a bone trabecular structure; the intramedullary pin is positioned on the inner side of the main body structure, which is bonded with and retains bone, and the intramedullary pin and the main body structure are of an integrated structure; the top end of the intramedullary pin exceeds the top of the main body structure; the outer side surface of the main body structure is provided with titanium cable grooves which are axially arrayed along the main body structure; each main body section separated by the titanium cable groove is provided with a threaded hole perpendicular to the axis of the main body section;
The upper surface of the joint surface gasket is of a U-shaped groove structure, and the lower surface of the joint surface gasket is of a joint surface; the bottom end of the main body structure is embedded in the U-shaped groove structure and is connected with the joint surface gasket through an oblique connecting screw;
The bottom end of the outer side surface of the main body structure is provided with collateral ligament holes and cruciate ligament holes perpendicular to the axis of the main body structure.
Further, the metal prosthesis is fixedly connected with reserved bones through screws in threaded holes.
Further, the axes of the collateral ligament hole and the cruciate ligament hole are parallel to the axis of the screw hole.
Further, the articular surface of the articular surface pad is highly polished.
Compared with the prior art, the utility model has the advantages that:
1. The articular surface part is designed to be made of a non-metal material with stronger wear resistance (such as polyethylene, PEEK and other materials with excellent biocompatibility), so that chips cannot be generated to cause infection of patients, the articular surface is highly polished, the abrasion between the lower part of the articular surface liner and the cartilage of the tibial plateau is reduced, and the service life of the prosthesis is prolonged.
2. The intramedullary pin and the main body structure are fused, so that the intramedullary pin is not easy to break, the later repair risk of a patient is reduced, the titanium cable groove is added for binding and fixing, and the mechanical fixing effect is further improved.
3. The joint surface of the joint surface pad is highly polished, a nail hole structure is not designed, the complete joint surface is reserved, and the abrasion of the prosthesis to joint cartilage is reduced.
4. The main body structure and the intramedullary pin are designed to be porous structures, so that the weight of the prosthesis is greatly reduced, and the burden of a patient is reduced.
Drawings
Fig. 1 is a schematic diagram of the front structure of an embodiment of the present utility model.
Fig. 2 is a schematic front view of a metal prosthesis in an embodiment of the present utility model.
Fig. 3 is a schematic side view of a metal prosthesis in an embodiment of the present utility model.
Fig. 4 is a schematic front view of an articular surface spacer in an embodiment of the present utility model.
Fig. 5 is a top view of an articular surface spacer in an embodiment of the present utility model.
FIG. 6 is a schematic diagram of a simulated installation of an embodiment of the present utility model.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples.
Customizing a personalized semi-condylar prosthesis, including a metal prosthesis and a articular surface liner; the metal prosthesis mainly comprises a main body structure and an intramedullary pin, wherein the main body structure and the intramedullary pin are both of a bone trabecular structure; the intramedullary pin is positioned on the inner side of the main body structure, which is bonded with and retains bone, and the intramedullary pin and the main body structure are of an integrated structure; the top end of the intramedullary pin exceeds the top of the main body structure; the outer side surface of the main body structure is provided with titanium cable grooves which are axially arrayed along the main body structure; each main body section separated by the titanium cable groove is provided with a threaded hole perpendicular to the axis of the main body section;
The upper surface of the joint surface gasket is of a U-shaped groove structure, and the lower surface of the joint surface gasket is of a joint surface; the bottom end of the main body structure is embedded in the U-shaped groove structure and is connected with the joint surface gasket through an oblique connecting screw;
The bottom end of the outer side surface of the main body structure is provided with collateral ligament holes and cruciate ligament holes perpendicular to the axis of the main body structure.
Further, the metal prosthesis is fixedly connected with reserved bones through screws in threaded holes.
Further, the axes of the collateral ligament hole and the cruciate ligament hole are parallel to the axis of the screw hole.
Further, the articular surface of the articular surface pad is highly polished.
The following is a more specific example:
the prior art is mainly aimed at a tumor half-joint half-condyle prosthesis of a specific patient, so as to increase the wear resistance of the prosthesis and prevent infection caused by metal scraps generated by friction between metal and bone.
Referring to fig. 1 to 6, in order to reduce the weight of the prosthesis and the burden of the patient, the metal prosthesis is designed to be of a porous structure, and the bone ingrowth, soft tissue crawling and the later biological fixing effect of the prosthesis are greatly enhanced, and the prosthesis is provided with a titanium cable groove, screw holes and ligament suture holes, so that the mechanical stability of the prosthesis is improved.
The structural features of this embodiment include:
The metal prosthesis structure 1 is used as a main body, the whole body 1 except the nail holes and the suture holes is a printing porous structure, so that the weight of the prosthesis is greatly reduced, and the burden of a patient is reduced;
The structure 2 is a joint surface gasket, the thickness is about 3-10mm, the joint surface 22 adopts a high polishing technology, the abrasion between the lower part of the joint surface gasket and the joint surface of the tibia platform is reduced, the service life of the prosthesis is prolonged, the wear resistance is high, the infection of a patient is not caused by scraps, the patient is prevented from being infected, the joint surface gasket is screwed into the threaded hole 23 from the bolt hole 15 by the bolt and is fixed on the main body 1, and the main body 1 is clamped into the clamping groove 21 for increasing the fixing effect;
The main body 1 is also provided with an integral intramedullary pin 11, the implanted intramedullary cavity is short in length design, the prosthesis is convenient to install, steel wires or titanium cables are fixed on bones through titanium cable grooves 12, and leather nails and loose nails are fixed on the bones through screw holes 13, so that the stability of the prosthesis is improved;
and the main body 1 is provided with a collateral ligament hole 14 and a cruciate ligament hole 16, and the muscle ligament is sutured to restore the joint function of the patient;
(1) The whole metal prosthesis is of a porous structure except for screw holes and suture holes, so that a good weight reduction effect is achieved, the burden of a patient is lightened, and the soft tissue crawling and bone growth effect and the later-stage stability of the prosthesis are greatly improved.
(2) The articular surface of the prosthesis is designed to be made of a non-metal material with strong wear resistance (such as polyethylene, PEEK and other materials with excellent biocompatibility), so that the infection caused by metal scraps generated by the prosthesis is prevented, the articular surface is subjected to high polishing treatment, the abrasion with cartilage of a tibial plateau is reduced, the service life of the prosthesis is prolonged, and the repairing risk of a patient is further reduced.
(3) The intramedullary needle is designed on the inner side of the main body structure to be inserted into the intramedullary cavity for fixation, and the screw hole, the titanium cable groove and the collateral ligament cruciate ligament suture hole are designed at the same time to increase the stability of the prosthesis;
(4) The joint surface gasket and the main body structure are fixed through bolts, the joint surface gasket is designed to be of a clamping groove structure, and the main body is clamped in the clamping groove structure, so that the stability of the joint surface gasket and the main body structure is further improved.
Claims (4)
1. Customizing the individualization semi-condylar prosthesis, which is characterized by comprising a metal prosthesis and a joint surface liner; the metal prosthesis mainly comprises a main body structure and an intramedullary pin, wherein the main body structure and the intramedullary pin are both of a bone trabecular structure; the intramedullary pin is positioned on the inner side of the main body structure, which is bonded with and retains bone, and the intramedullary pin and the main body structure are of an integrated structure; the top end of the intramedullary pin exceeds the top of the main body structure; the outer side surface of the main body structure is provided with titanium cable grooves which are axially arrayed along the main body structure; each main body section separated by the titanium cable groove is provided with a threaded hole perpendicular to the axis of the main body section;
The upper surface of the joint surface gasket is of a U-shaped groove structure, and the lower surface of the joint surface gasket is of a joint surface; the bottom end of the main body structure is embedded in the U-shaped groove structure and is connected with the joint surface gasket through an oblique connecting screw;
The bottom end of the outer side surface of the main body structure is provided with collateral ligament holes and cruciate ligament holes perpendicular to the axis of the main body structure.
2. The custom individualised semi-condylar prosthesis according to claim 1, wherein the metal prosthesis is fixedly attached to the retained bone by screws in threaded holes.
3. The custom individualised semi-condylar prosthesis of claim 1, wherein the axes of the collateral and cruciate ligament holes are parallel to the axis of the screw holes.
4. The custom individualised semi-condylar prosthesis of claim 1, wherein the articular surface of the articular surface liner is highly polished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321886327.4U CN221060964U (en) | 2023-07-18 | 2023-07-18 | Custom personalized semi-condylar prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321886327.4U CN221060964U (en) | 2023-07-18 | 2023-07-18 | Custom personalized semi-condylar prosthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221060964U true CN221060964U (en) | 2024-06-04 |
Family
ID=91272159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321886327.4U Active CN221060964U (en) | 2023-07-18 | 2023-07-18 | Custom personalized semi-condylar prosthesis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221060964U (en) |
-
2023
- 2023-07-18 CN CN202321886327.4U patent/CN221060964U/en active Active
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