Femoral osteotomy guiding device for knee joint replacement
By designing a knee replacement femoral osteotomy guide device with a two-dimensional adjustment mechanism, the problem of difficulty in fine-tuning of the osteotomy guide plate in the prior art is solved, and the osteotomy plane is adjusted during surgery, saving surgical steps and reducing patient injury.
Patent Information
- Application Number
- CN202421757531.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-24
AI Technical Summary
The existing osteotomy guide plates are difficult to fine-tune during use, and the position of the osteotomy limit groove cannot be adjusted during operation, resulting in cumbersome adjustment of the osteotomy plane and causing harm to the patient.
A femoral osteotomy guide device for knee replacement surgery is designed, which includes a positioning fixing plate, a cover plate, a hollow connecting screw, a screw, an up and down adjustment knob, a left and right adjustment knob and an osteotomy guide plate. The up and down and left and right adjustment of the osteotomy guide plate is achieved through a two-dimensional adjustment mechanism.
During the operation, the osteotomy guide plate is fine-tuned and the position of the osteotomy limit groove is adjusted, which saves surgical steps and reduces the damage caused to the patient by refixing.
Smart Images
Figure CN222968613U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of orthopedic instruments, in particular to a femoral osteotomy guiding device for knee joint replacement surgery. Background Art
[0002] The cartilage in the knee joint can wear out over time or be damaged due to injuries related to physical activities, resulting in osteoarthritis. The wear of cartilage causes pain and limits daily activities. Usually, osteoarthritis is treated by implanting an artificial joint to replace the original joint. However, total joint replacement has several disadvantages. For example, joint replacement usually requires removing a large part of the joint surface of the joint to accommodate the fixation of metal or polymer joint implants. In addition, the replacement joint usually has a service life of up to twenty years, so subsequent replacement surgeries are often required. In addition, joint replacement is often complicated by postoperative infections, osteolysis, and osteoporosis, which may require additional surgeries.
[0003] Knee joint replacement surgery usually requires osteotomy of the joint surface at the distal end of the femur. When performing osteotomy, an osteotomy guide plate and a reciprocating saw are required. At the same time, the osteotomy guide plate is fixed to the femur by Kirschner wires or screws, and then the reciprocating saw is passed through the osteotomy limiting slot of the osteotomy guide plate to cut the joint surface at the distal end of the femur. However, the currently used osteotomy guide plate has the following problems in the use process: after the osteotomy guide plate is fixed on the femur, its position is difficult to change, that is, the position of the osteotomy limiting slot cannot be adjusted by micro-adjusting the osteotomy guide plate, and the adjustment of the osteotomy plane cannot be completed during the operation. Often, to adjust the position of the osteotomy guide plate, the entire osteotomy device needs to be removed, and then the osteotomy guide plate needs to be repositioned and fixed. The adjustment method is more cumbersome and causes greater harm to the patient. Summary of the Utility Model
[0004] To solve the above problems, the utility model provides a femoral osteotomy guiding device for knee joint replacement surgery. The device can finely adjust the osteotomy guide plate during the operation, adjust the position of the osteotomy limiting slot by adjusting the position of the osteotomy guide plate, achieve the purpose of adjusting the osteotomy plane of the reciprocating saw, and there is no need to remove the entire osteotomy device and reposition and fix it during the adjustment process, saving surgical steps and reducing the harm caused by re-fixation to the patient.
[0005] To achieve the above technical effects, the utility model is realized through the following technical solutions:
[0006] Femoral osteotomy guiding device for knee joint replacement, comprising a positioning fixing plate, a cover plate, a hollow connecting screw, a screw, an up-and-down adjustment knob, a left-and-right adjustment knob and an osteotomy guiding plate. The positioning fixing plate and the cover plate are fixedly connected by the hollow connecting screw. The screw passes through the hollow connecting screw and is fixed on the femur. A two-dimensional adjustment mechanism is encapsulated between the positioning fixing plate and the cover plate. The osteotomy guiding plate is fixed on the two-dimensional adjustment mechanism. Both the up-and-down adjustment knob and the left-and-right adjustment knob are connected to the two-dimensional adjustment mechanism. When the up-and-down adjustment knob or the left-and-right adjustment knob is rotated, the osteotomy guiding plate can move up and down or left and right.
[0007] Further, the front surface of the positioning fixing plate is an arc surface matching the anatomical surface of the distal femur.
[0008] Further, a sliding groove is formed on the cover plate. The up-and-down adjustment knob extends out of the sliding groove and can slide left and right in the sliding groove.
[0009] Further, the two-dimensional adjustment mechanism includes a left-and-right adjustment plate and an up-and-down adjustment plate. A trapezoidal sliding groove is transversely formed on the positioning fixing plate. A strip-shaped trapezoidal sliding block is fixed at the bottom of the left-and-right adjustment plate. The trapezoidal sliding block is clamped into the trapezoidal sliding groove. A rack is fixed at the bottom of the left-and-right adjustment plate. The left-and-right adjustment plate is meshed and connected with a first gear through the rack. The left-and-right adjustment knob is fixedly connected with the first gear. When the left-and-right adjustment knob is rotated, the first gear will drive the left-and-right adjustment plate to slide left and right. A trapezoidal sliding groove is vertically formed on the left-and-right adjustment plate. A trapezoidal sliding block is fixed on the back of the up-and-down adjustment plate. A second gear is fixed on the left-and-right adjustment plate. A rack is fixed on the right side of the up-and-down adjustment plate. The second gear is meshed and connected with the rack. The up-and-down adjustment knob is fixedly connected with the second gear. When the up-and-down adjustment knob is rotated, the up-and-down adjustment plate will slide up and down along the left-and-right adjustment plate. The osteotomy guiding plate is fixed on the up-and-down adjustment plate. The osteotomy guiding plate slides up, down, left and right along with the two-dimensional adjustment mechanism.
[0010] Further, an osteotomy limiting groove for a swing saw to pass through is formed on the osteotomy guiding plate.
[0011] The beneficial effects of the present utility model are as follows: The device can finely adjust the osteotomy guiding plate during the operation, adjust the position of the osteotomy limiting groove by adjusting the position of the osteotomy guiding plate, so as to achieve the purpose of adjusting the osteotomy plane of the swing saw. During the adjustment process, it is not necessary to remove the whole set of osteotomy devices and reposition and fix them, which saves the surgical steps and reduces the harm caused by re-fixation to the patient. Description of the Drawings
[0012] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0013] Figure 1 is an assembly structure schematic diagram of a femoral osteotomy guiding device for knee joint replacement surgery;
[0014] Figure 2 is a schematic diagram of the internal structure of a femoral osteotomy guiding device for knee joint replacement surgery Figure 1 ;
[0015] Figure 3 is a schematic diagram of the internal structure of a femoral osteotomy guiding device for knee joint replacement surgery Figure 2 .
[0016] In the drawings, the list of components represented by each reference numeral is as follows:
[0017] 1 - positioning fixing plate, 2 - cover plate, 3 - hollow connecting screw, 4 - screw, 5 - left - right adjustment knob, 6 - up - down adjustment knob, 7 - sliding groove, 8 - osteotomy guiding plate, 9 - left - right adjustment plate, 10 - up - down adjustment plate, 11 - first gear, 12 - second gear, 13 - trapezoidal sliding groove, 14 - trapezoidal slider. Specific embodiments
[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some, rather than all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.
[0019] Such as Figure 1As shown in the figure, the femoral osteotomy guiding device for knee joint replacement includes a positioning fixing plate 1, a cover plate 2, a hollow connecting screw 3, a screw 4, an up-and-down adjustment knob 6, a left-and-right adjustment knob 5, and an osteotomy guiding plate 8. An osteotomy limiting groove for a swing saw to pass through is formed on the osteotomy guiding plate. The front surface of the positioning fixing plate is an arc surface matching the anatomical surface of the distal femur. A sliding groove 7 is formed on the cover plate. The up-and-down adjustment knob 6 extends out of the sliding groove 7 and can slide left and right in the sliding groove. The positioning fixing plate 1 and the cover plate 2 are fixedly connected through the hollow connecting screw 3. The screw 4 passes through the hollow connecting screw and is fixed to the femur. A two-dimensional adjustment mechanism is encapsulated between the positioning fixing plate 1 and the cover plate 2. The osteotomy guiding plate is fixed to the two-dimensional adjustment mechanism. Both the up-and-down adjustment knob and the left-and-right adjustment knob are connected to the two-dimensional adjustment mechanism. When the up-and-down adjustment knob or the left-and-right adjustment knob is rotated, the osteotomy guiding plate can move up and down or left and right.
[0020] As Figures 2-3 shown, the two-dimensional adjustment mechanism includes a left-and-right adjustment plate 9 and an up-and-down adjustment plate 10. A trapezoidal sliding groove 13 is transversely formed on the positioning fixing plate 1. A strip-shaped trapezoidal sliding block 14 is fixedly connected to the bottom of the left-and-right adjustment plate. The trapezoidal sliding block is clamped into the trapezoidal sliding groove. A rack is fixedly connected to the bottom of the left-and-right adjustment plate. A first gear is fixedly connected to the bottom of the positioning fixing plate. The left-and-right adjustment plate is meshed and connected to the first gear 11 through the rack. The left-and-right adjustment knob 5 is fixedly connected to the first gear 11. When the left-and-right adjustment knob 5 is rotated, the first gear 11 will drive the left-and-right adjustment plate 9 to slide left and right. A trapezoidal sliding groove is vertically formed on the left-and-right adjustment plate. A trapezoidal sliding block 14 is fixedly connected to the back of the up-and-down adjustment plate 10. A second gear 12 is fixedly connected to one side of the left-and-right adjustment plate. A rack is fixedly connected to the right side of the up-and-down adjustment plate 10. The second gear is meshed and connected to the rack. The up-and-down adjustment knob is fixedly connected to the second gear. When the up-and-down adjustment knob is rotated, the up-and-down adjustment plate will slide up and down along the left-and-right adjustment plate. The osteotomy guiding plate is fixed to the up-and-down adjustment plate. The osteotomy guiding plate slides up, down, left, and right along with the two-dimensional adjustment mechanism.
[0021] A specific application of this device is as follows: Position and drill the femur. Fix the positioning fixing plate 1 to the bone surface of the distal femur through the screw 4. The swing saw can pass through the osteotomy limiting groove on the osteotomy guiding plate 8 to perform osteotomy on the distal femoral joint surface. When it is necessary to adjust the swing saw osteotomy plane corresponding to the osteotomy limiting groove during the operation, the up-and-down adjustment knob 6 and the left-and-right adjustment knob 5 can be rotated. The second gear and the first gear will rotate respectively. The corresponding meshed up-and-down adjustment plate and left-and-right adjustment plate will slide up and down and left and right respectively. The osteotomy guiding plate 8 will move up, down, left, and right accordingly, so as to finely adjust the osteotomy guiding plate and achieve the purpose of adjusting the swing saw osteotomy plane. During the adjustment process, there is no need to remove the entire osteotomy device and reposition and fix it, which saves surgical steps and reduces the harm caused to the patient by re-fixation.
[0022] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.
Claims
1. A femoral osteotomy guide device for knee replacement, characterized in that: It includes a positioning fixing plate, a cover plate, a hollow connecting screw, a screw, an up and down adjustment knob, a left and right adjustment knob and an osteotomy guide plate. The positioning fixing plate and the cover plate are fixedly connected by the hollow connecting screw. The screw is fixed on the femur after passing through the hollow connecting screw. A two-dimensional adjustment mechanism is encapsulated between the positioning fixing plate and the cover plate. The osteotomy guide plate is fixed on the two-dimensional adjustment mechanism. The up and down adjustment knobs and the left and right adjustment knobs are all connected to the two-dimensional adjustment mechanism. When the up and down adjustment knobs or the left and right adjustment knobs are turned, the osteotomy guide plate can move up and down or left and right.
2. The femoral osteotomy guide device for knee replacement according to claim 1, characterized in that: The front side of the positioning and fixing plate is an arc-shaped surface matching the anatomical surface of the distal end of the femur.
3. The femoral osteotomy guide device for knee replacement according to claim 1, characterized in that: A slide groove is provided on the cover plate, and the up-and-down adjusting knob extends out of the slide groove and can slide left and right in the slide groove.
4. The femoral osteotomy guide device for knee replacement according to claim 1, characterized in that: The two-dimensional adjustment mechanism includes a left and right adjusting plate and an up and down adjusting plate, the positioning and fixing plate is horizontally provided with a trapezoidal slide groove, the bottom of the left and right adjusting plate is fixed with a strip-shaped trapezoidal slide block, the trapezoidal slide block is stuck in the trapezoidal slide groove, the bottom of the left and right adjusting plate is fixed with a rack, the left and right adjusting plate is meshed with a first gear through the rack, the left and right adjusting knob is fixedly connected with the first gear, and when the left and right adjusting knob is turned, the first gear will drive the left and right adjusting plate to slide left and right, the left and right adjusting plate is vertically provided with a trapezoidal slide groove, the back of the up and down adjusting plate is fixed with a trapezoidal slide block, the left and right adjusting plate is fixed with a second gear, the right side of the up and down adjusting plate is fixed with a rack, the second gear is meshed with the rack, and the up and down adjusting knob is fixedly connected with the second gear. When the up and down adjusting knob is turned, the up and down adjusting plate will slide up and down along the left and right adjusting plate, the osteotomy guide plate is fixed on the up and down adjusting plate, and the osteotomy guide plate slides up, down, left and right with the two-dimensional adjustment mechanism.
5. The femoral osteotomy guide device for knee replacement according to claim 1, characterized in that: The osteotomy guide plate is provided with an osteotomy limiting groove for the swing saw to pass through.