CN211750286U - Antibiotic bone cement knee joint spacer - Google Patents
Antibiotic bone cement knee joint spacer Download PDFInfo
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- CN211750286U CN211750286U CN201921739181.4U CN201921739181U CN211750286U CN 211750286 U CN211750286 U CN 211750286U CN 201921739181 U CN201921739181 U CN 201921739181U CN 211750286 U CN211750286 U CN 211750286U
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Abstract
The invention discloses an antibiotic bone cement knee joint spacer, which belongs to the field of medical instruments and comprises a femoral component and a tibial component. When the novel bone component is used, the femoral component is fixed at the femoral bone end after debridement, the tibial component is fixed at the tibial bone end after debridement, and joint type movement can be provided between the femoral component and the tibial component. Wherein, a certain number of circular grooves are designed on the femoral component, so that the femoral component and the femur can be quickly and firmly combined through the antibiotic bone cement during the operation. The lower end of the tibial component is provided with a fixing rod, a certain number of small grooves are designed around the fixing rod, and the small grooves enable the tibial component and the tibia to be combined more firmly through antibiotic bone cement. The invention can keep proper joint movement during the use period, reduces scars, ligament shortening around joints, joint capsule contracture and bone abrasion generated during the interval of two operations, and simultaneously, the femoral component and the tibial component are firmly combined with the bone of a human body, thereby greatly improving the life quality of a patient.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to an antibiotic bone cement knee joint spacer.
Background
The artificial knee joint replacement is a popular operation mode for treating knee joint diseases at present, can effectively treat late knee joint diseases, and greatly improves the life quality of patients. Postoperative infection is one of the most serious complications after operation, which not only gives great pain to patients in physiology and spirit, but also brings great obstruction to treatment. The method for taking out the original prosthesis to thoroughly debride, using the temporary spacer to maintain the tension of soft tissues, avoiding the contracture of the soft tissues around the knee joint, providing high-concentration antibiotics for local parts, and performing second-stage operation revision after infection control is the most effective method for the infection treatment after the artificial joint replacement, which is currently accepted and widely adopted.
Present knee joint spacer surface is mostly smooth shape, and this just causes the doctor in the operation with fixed stranded difficult easy the droing between thighbone component, shin bone component and human skeleton, patient easily becomes flexible in the use moreover, leads to it to take place the displacement in vivo, and the activity at the interval is restricted, has lost the meaning that movable spacer originally existed.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a knee joint spacer which can be firmly fixed relative to a femur and a tibia so as to solve the problems that the post-operation spacer in the prior art is easy to loosen and displace and the like.
In order to achieve the purpose, the invention adopts the following design scheme:
an antibiotic bone cement knee spacer comprising a femoral component and a tibial component, the femoral component comprising an inner surface and an outer surface, the tibial component comprising an upper surface, a lower surface and a fixation rod, wherein the femoral component and the tibial component are articularly connected. A certain number of circular grooves are designed on the inner surface of the femoral component; a fixing rod for positioning is designed on the tibial component, and a certain number of grooves are designed around the fixing rod.
The outer surface of the femoral component consists of a femoral left side surface and a femoral right side surface, and the upper surface of the tibial component consists of a tibial left side surface and a tibial right side surface.
Further, the thighbone left surface, the thighbone right surface, the shin bone left surface and the shin bone right surface are all arc surfaces, and the curvature radius of the shin bone left surface and the shin bone right surface is greater than the curvature radius R2 of the thighbone left surface and the shin bone right surface.
Furthermore, the femoral component and the tibial component are integrally formed by a mould, and the manufacturing materials are antibiotic bone cement.
Further, the upper surface (21) of the tibial component (2) has a posterior end (211) higher than an anterior end (212).
The invention has the beneficial effects that: compared with the prior art, the femoral component and the tibial component are both provided with a certain number of grooves for filling antibiotic bone cement, so that the femoral component, the tibial component and the bone cement are combined more firmly, and the spacer is not easy to loosen and move after an operation, thereby relieving the physiological pain of a patient and facilitating the subsequent operation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a perspective view of a tibial component of the present invention.
Fig. 3 is a perspective view of the femoral component and the tibial component in combination.
Detailed Description
In order to better explain the present example and to make the technical means, the creation features and the function and efficacy of the present invention easier to understand, the present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 1, 2 and 3, a cement spacer for knee joint containing antibiotics comprises a femoral component 1 and a tibial component 2 shown in fig. 1. The femoral component 1 is comprised of an inner surface 11 and an outer surface 13 and the tibial component 2 is comprised of an upper surface 21, a lower surface 22 and a fixation rod 23, wherein the femoral component 1 and the tibial component 2 are connected in a surface articulating manner. The femoral component 1 and the tibial component 2 are designed according to the clinical experience of doctors and the size of the knee joint of the Chinese, and the connection matching performance is good. A certain number of circular grooves 111 are designed on the inner surface 11 of the femoral component 1, the inner surface 11 of the femoral component 1 is coated with antibiotic bone cement and then is placed at the far end of the femur, and due to the effect of the circular grooves 111 on the inner surface 11, the femoral component and the femur can be fixedly combined after the bone cement is solidified.
The lower surface 22 of the tibial component 2 is coated with antibiotic bone cement, then the fixing rod 23 is inserted into the proximal end of the tibial platform, the tibial component 2 and the top of the tibia are pressed tightly, and after the antibiotic bone cement is solidified, the tibial component 2 and the tibia are fixedly combined.
A femoral component 1 and a tibial component 2Surface ofArticularly connected, the outer surface 13 of the femoral component 1 is composed of a femoral left side 131 and a femoral right side 132, the upper surface 21 of the tibial component 2 is composed of a tibial left side 213 and a tibial right side 214, and the upper surface 21 of the tibial component 2 has a posterior end 211 that is higher than an anterior end 212. The curvature radiuses of the tibia left side surface 213 and the tibia right side surface 214 are larger than the curvature radiuses R2 of the femur left side surface 131 and the femur right side surface 132, so that the relative movement of the femur element 1 and the tibia element 2 is ensured to be smooth, and the interference phenomenon is avoided.
In practical application, after the doctor thoroughly removes the infected tissue, the invention selects the femoral component and the tibial component which are suitable for the size of the patient, and selects the bone cement added with different antibiotics according to the actual requirements to deal with the infection. When a new prosthesis is implanted again, the bone cement for fixation is removed, and the knee joint spacer can be taken out.
Claims (5)
1. An antibiotic bone cement knee spacer, characterized in that it comprises a femoral component (1) and a tibial component (2), said femoral component (1) consisting of an inner surface (11) and an outer surface (13), said tibial component (2) consisting of an upper surface (21), a lower surface (22) and a fixation rod (23), wherein the femoral component (1) and the tibial component (2) are articulately connected, a number of circular grooves (111) are designed on the inner surface (11) of the femoral component (1); a fixing rod (23) for positioning is designed on the tibial component (2), and a certain number of grooves (24) are designed around the fixing rod (23).
2. An antibiotic bone cement knee spacer according to claim 1, characterized in that the outer surface (13) of the femoral component (1) consists of a femoral left side (131) and a femoral right side (132), and the upper surface (21) of the tibial component (2) consists of a tibial left side (213) and a tibial right side (214).
3. The antibiotic bone cement knee spacer as claimed in claim 2, wherein the femur left side (131), the femur right side (132), the tibia left side (213), and the tibia right side (214) are all circular arc surfaces, and the curvature radius R1 of the tibia left side (213) and the tibia right side (214) is greater than the curvature radius R2 of the femur left side (131) and the femur right side (132).
4. The antibiotic bone cement knee spacer as claimed in claim 1, wherein the femoral component and the tibial component are integrally formed by a mold and made of antibiotic bone cement.
5. An antibiotic bone cement knee spacer according to claim 1, characterized in that the upper surface (21) of the tibial element (2) has a posterior end (211) higher than an anterior end (212).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921739181.4U CN211750286U (en) | 2019-10-17 | 2019-10-17 | Antibiotic bone cement knee joint spacer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921739181.4U CN211750286U (en) | 2019-10-17 | 2019-10-17 | Antibiotic bone cement knee joint spacer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211750286U true CN211750286U (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921739181.4U Active CN211750286U (en) | 2019-10-17 | 2019-10-17 | Antibiotic bone cement knee joint spacer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211750286U (en) |
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2019
- 2019-10-17 CN CN201921739181.4U patent/CN211750286U/en active Active
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