High tibia osteotomy and angle adjusting guide plate
By designing a 3D printed osteotomy guide and an angle adjustment guide that is suitable for the tibial surface, the problem of low accuracy caused by sliding of the osteotomy guide during surgery in the prior art is solved, achieving higher surgical accuracy and lower surgical risks.
Patent Information
- Application Number
- CN202421751387.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-23
AI Technical Summary
In the prior art, when tibial osteotomy and angle adjustment are adjusted, the guide plate is prone to slide due to factors such as soft tissue, blood or vibration during the operation, resulting in insufficient adjustment of the cutoff position and angle, which increases the risk and uncertainty of the operation.
A high-level tibial osteotomy and angle adjustment guide system including an osteotomy guide plate and an angle adjustment guide plate was designed. The inner surface of the osteotomy guide plate is adapted to the tibial surface, prepared by 3D printing, and through the design of fixing holes and fixing blocks, ensuring that the guide plate is stable and fixed during surgery.
The personalized guide plate prepared by 3D printing significantly improves surgical accuracy, avoids movement of the guide plate relative to the tibia during osteotomy, ensures the accuracy of the truncation position, and simplifies the angle adjustment process and reduces the risk of surgery.
Smart Images
Figure CN222983109U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of orthopedic medical devices, and specifically relates to a high tibial osteotomy and angle adjustment guide plate. Background Technique
[0002] Knee osteoarthritis belongs to degenerative joint disease, and the severe symptoms are joint pain, stiffness, deformation, and limited movement, etc., which can cause disability. It affects the patient's motor function and living ability. In severe cases of knee osteoarthritis, joint replacement is required, but the replacement surgery has a large trauma and high cost. High tibial osteotomy (HTO) is a knee-preserving surgery. By osteotomizing the proximal tibia, the force line can be transferred from the severely worn compartment to the contralateral normal compartment, thereby prolonging the service life of the knee joint. It is suitable for patients with severe single-compartment damage.
[0003] In the prior art, when performing tibial osteotomy and angle adjustment after osteotomy, a guide plate is usually used as an auxiliary tool. However, during the operation, due to the possible presence of soft tissues, blood, or other liquids on the bone surface, as well as factors such as vibration during the operation, the guide plate may slide relative to the bone, which may lead to inaccurate truncation position and angle adjustment, thereby increasing the uncertainty and risk of the operation and affecting postoperative recovery and joint function. Content of the Utility Model
[0004] The purpose of the utility model is to improve and innovate in view of the disadvantages and problems existing in the background technique, and to provide a high tibial osteotomy and angle adjustment guide plate.
[0005] A high tibial osteotomy and angle adjustment guide plate includes an osteotomy guide plate and an angle adjustment guide plate. The osteotomy guide plate includes a first guide plate body, on which a first osteotomy groove and a second osteotomy groove are opened. At least one fixing hole is also provided on the first guide plate body. The inner surface of the osteotomy guide plate is in an arc shape adapted to the surface of the human tibia. When the osteotomy guide plate is fixed to the human tibia through the fixing hole, the first osteotomy groove is in a horizontal state and the second osteotomy groove is in a vertical state. The angle adjustment guide plate includes a second guide plate body, and the second guide plate body is a right trapezoidal block. The first osteotomy groove and / or the second osteotomy groove are used to complete high tibial osteotomy, and the second guide plate body is used to complete the angle adjustment of the tibia after osteotomy.
[0006] Further, both the osteotomy guide plate and the angle adjustment guide plate are prepared by 3D printing.
[0007] Further, the first guide plate body is composed of a horizontal part and a vertical part, so that the first guide plate body is in an L shape. The fixing hole includes a first fixing hole, and the first fixing hole is opened at the connection of the horizontal part and the vertical part.
[0008] A further solution is that one end of the horizontal part far from the vertical part is connected to one end of the vertical part far from the horizontal part through a connecting part, and the inner surface of the connecting part is also in an arc shape adapted to the surface of the human tibia.
[0009] A further solution is that a second fixing block is arranged in the middle of the side of the horizontal part far from the connecting part, a first fixing block is arranged in the middle of the connecting part, both the first fixing block and the second fixing block extend towards the outer surface side of the osteotomy guide plate, a second fixing hole is formed in the first fixing block, and a third fixing hole is formed in the second fixing block.
[0010] A further solution is that both the first fixing block and the second fixing block are in a frustum shape, and the diameter of the first fixing block and the second fixing block on the side close to the human tibia is larger than the diameter on the side far from the human tibia.
[0011] A further solution is that a handle is fixedly connected to the second guide plate body.
[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: (1) The 3D printing personalized osteotomy guide plate and angle adjustment guide plate of the present utility model can greatly improve the surgical precision. The inner surface of the osteotomy guide plate is in an arc shape adapted to the surface of the human tibia, and the osteotomy guide plate is penetrated by a Kirschner wire, which is convenient to connect and fix the osteotomy guide plate to the tibia. Under the interference of factors such as vibration during the operation, it can avoid the osteotomy guide plate moving relative to the tibia during osteotomy, thereby ensuring the accuracy of the truncation position;
[0013] (2) The angle adjustment guide plate of the present utility model mainly includes a second guide plate body, and the second guide plate body is a right trapezoidal block; after the tibia is truncated, the inclined surface of the right trapezoidal block is convenient for adjusting the angle of the tibia after osteotomy;
[0014] (3) The osteotomy guide plate of the present utility model is fixed on the tibia through the first fixing hole, the second fixing hole and the third fixing hole, and the connecting lines between the first fixing hole, the second fixing hole and the third fixing hole can form a triangle, and the triangle has stability, and this triangle is close to the central part of the osteotomy guide plate, so that the osteotomy guide plate can be stably fixed on the tibia, effectively preventing the osteotomy guide plate from moving relative to the tibia during osteotomy; in addition, the osteotomy guide plate of the present utility model has no redundant parts and is light enough.
[0015] (4) Both the first fixing block and the second fixing block of the present utility model are in a frustum shape. On the one hand, it will not reduce the contact area between the first fixing block and the second fixing block and the tibia, and on the other hand, it is also beneficial to the light weight of the first fixing block and the second fixing block. Description of the Drawings
[0016] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the accompanying drawings required for use in the embodiments will be briefly introduced below. Obviously, the accompanying 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 accompanying drawings can be obtained based on these drawings.
[0017] Figure 1 Schematic front three-dimensional structure diagram of the osteotomy guide plate provided by the embodiment of the present utility model;
[0018] Figure 2 Schematic back three-dimensional structure diagram of the osteotomy guide plate provided by the embodiment of the present utility model;
[0019] Figure 3 Schematic three-dimensional structure diagram of the angle adjustment guide plate provided by the embodiment of the present utility model.
[0020] Reference numerals: osteotomy guide plate 1, first guide plate main body 11, horizontal part 111, vertical part 112, first fixing hole 12, second fixing hole 13, third fixing hole 14, connecting part 15, first osteotomy groove 16, second osteotomy groove 17, first fixing block 18, second fixing block 19, angle adjustment guide plate 2, second guide plate main body 21, handle 22. Detailed implementation manners
[0021] To make the objectives, features, and advantages of the present utility model more obvious and understandable, the following provides a detailed description of the specific implementation manners of the present utility model with reference to the accompanying drawings.
[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.
[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific implementation manners and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0024] Please refer to Figures 1 - 3, the present utility model provides a high tibial osteotomy and angle adjustment guide plate, including an osteotomy guide plate 1 and an angle adjustment guide plate 2. Among them, the inner surface of the osteotomy guide plate 1 is in an arc shape adapted to the surface of the human tibia, which facilitates the osteotomy guide plate 1 to adhere to the bone surface. The osteotomy guide plate 1 includes a first guide plate body 11, and the first guide plate body 11 is in an L shape and is composed of a horizontal part 111 and a vertical part 112. A first osteotomy groove 16 and a second osteotomy groove 17 are respectively formed on the horizontal part 111 and the vertical part 112. When the osteotomy guide plate 1 is fixed to the tibia, the first osteotomy groove 16 is in a horizontal state, and the second osteotomy groove 17 is in a vertical state; the first osteotomy groove 16 and / or the second osteotomy groove 17 are used to complete high tibial osteotomy.
[0025] Specifically, the osteotomy groove is used to determine the position of tibial truncation. The first osteotomy groove 16 facilitates the transverse truncation of the tibia, and the second osteotomy groove 17 cooperates with the first osteotomy groove 16 to facilitate the truncation of the bone first transversely and then vertically to form an L-shaped osteotomy.
[0026] A first fixing hole 12 is formed at the connection between the horizontal part 111 and the vertical part 112. The first fixing hole 12 can facilitate the passing of a Kirschner wire to connect and fix the osteotomy guide plate 1 to the tibia, avoiding the relative movement of the osteotomy guide plate 1 with respect to the tibia during osteotomy, thereby ensuring the accuracy of the truncation position.
[0027] One end of the horizontal part 111 away from the vertical part 112 is connected to one end of the vertical part 112 away from the horizontal part 111 through a connecting part 15, and the inner surface of the connecting part 15 is also in an arc shape adapted to the surface of the human tibia. A second fixing block 19 is arranged in the middle of the side of the horizontal part 111 away from the connecting part 15, and a first fixing block 18 is arranged in the middle of the connecting part 15. The first fixing block 18 and the second fixing block 19 both extend towards the outer surface side of the osteotomy guide plate 1. A second fixing hole 13 is formed in the first fixing block 18, and a third fixing hole 14 is formed in the second fixing block 19. The second fixing hole 13 and the third fixing hole 14 can also facilitate the passing of a Kirschner wire and connect and fix the osteotomy guide plate 1 to the tibia, further avoiding the relative movement of the osteotomy guide plate 1 with respect to the tibia during osteotomy, thereby ensuring the accuracy of the truncation position.
[0028] It should be noted that by setting the connecting part 15, on the one hand, the contact area between the osteotomy guide plate 1 and the tibia is increased; on the other hand, by setting the connecting part 15, it is convenient to set the first fixing block 18 and drill the second fixing hole 13; and the connecting lines between the first fixing hole 12, the second fixing hole 13 and the third fixing hole 14 can form a triangle, and the triangle has stability, and this triangle is close to the central part of the osteotomy guide plate 1, so that the osteotomy guide plate 1 can be stably fixed on the tibia, effectively preventing the osteotomy guide plate 1 from moving relative to the tibia during osteotomy. In addition, the main body of the osteotomy guide plate 1 is L-shaped, and the horizontal part 111 is connected to the vertical part 112 through the connecting part 15, without redundant parts, making the osteotomy guide plate 1 sufficiently lightweight.
[0029] Optionally, both the first fixing block 18 and the second fixing block 19 are frustum-shaped, and the diameter of the first fixing block 18 and the second fixing block 19 on the side close to the human tibia is larger than the diameter on the side far from the human tibia. It can be understood that on the one hand, the contact area between the first fixing block 18, the second fixing block 19 and the tibia will not be reduced, and on the other hand, it is also beneficial to the lightweight of the first fixing block 18 and the second fixing block 19.
[0030] The angle adjustment guide plate 2 includes a second guide plate body 21, and the second guide plate body 21 is a right trapezoidal block; after the tibia is transected, the angle adjustment guide plate 2 spreads the fractured bone to complete the angle adjustment; the inclined surface of the second guide plate body 21 is convenient for adjusting the angle of the tibia after osteotomy. A handle 22 is fixedly connected to the second guide plate body 21. The handle 22 is convenient for holding the second guide plate body 21.
[0031] Both the osteotomy guide plate 1 and the angle adjustment guide plate 2 are prepared by 3D printing. Specifically, preoperative CT magnetic resonance imaging can be used to obtain 3D images of the lower limbs, import them into design software to model the lower limb bones, determine the target force line and correction angle, design the hinge points, osteotomy lines and osteotomy angles, design the osteotomy guide plate 1 and the angle adjustment guide plate 2 and perform 3D printing. The osteotomy guide plate 1 and the angle adjustment guide plate 2 obtained by 3D printing can greatly improve the surgical accuracy, quickly bring the lower limb force line to the preoperative simulated position, reduce the damage to the patient's bones, nerves and blood vessels, shorten the operation time and hospital stay, reduce the bleeding volume, and at the same time, the correction of the lower limb negative gravity line helps the patient's knee joint to recover.
[0032] Working principle of the present utility model: During specific use, the patient lies in a supine position during the operation, and combined spinal-epidural anesthesia is performed. A tourniquet is tied around the root of the affected thigh and inflated to 60 kPa. A 3-cm incision is made on the lateral side of the proximal tibia, and the muscles and periosteum are separated layer by layer to expose the knee joint. After removing the osteophytes, the sterilized osteotomy guide plate 1 is placed on the lateral surface of the tibia and fixed with a Kirschner wire. The tibia is transected along the osteotomy groove, and the osteotomy guide plate 1 is removed. Then, the angle adjustment guide plate 2 is used to expand and complete the angle adjustment. After completion, locking compression plate internal fixation is performed, and then the angle expansion guide plate 2 is removed. Then, the incision is rinsed with normal saline, a negative pressure drainage tube is placed, and the layers are sutured layer by layer.
[0033] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the utility model.
[0034] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means 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 expressions of the above terms do not necessarily refer to the same embodiment or example.
[0035] Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all embodiments. The mention of "embodiment" in this article means that the specific features, structures, or characteristics described in connection with the embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art can explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.
[0036] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.
Claims
1. A guide plate for high tibial osteotomy and angle adjustment, characterized in that: The invention comprises an osteotomy guide plate (1) and an angle adjustment guide plate (2), wherein the osteotomy guide plate (1) comprises a first guide plate body (11), the first guide plate body (11) is provided with a first osteotomy groove (16) and a second osteotomy groove (17), the first guide plate body (11) is also provided with at least one fixing hole, the inner surface of the osteotomy guide plate (1) is in an arc shape adapted to the surface of the human tibia, when the osteotomy guide plate (1) is fixed to the human tibia through the fixing hole, the first osteotomy groove (16) is in a horizontal state, and the second osteotomy groove (17) is in a vertical state; the angle adjustment guide plate (2) comprises a second guide plate body (21), the second guide plate body (21) is a right-angled trapezoidal block; the first osteotomy groove (16) and / or the second osteotomy groove (17) are used to complete high-position osteotomy, and the second guide plate body (21) is used to complete the angle adjustment of the tibia after osteotomy.
2. A guide plate for high tibial osteotomy and angle adjustment according to claim 1, characterized in that: The osteotomy guide plate (1) and the angle adjustment guide plate (2) are both prepared by 3D printing.
3. A guide plate for high tibial osteotomy and angle adjustment according to claim 1, characterized in that: The first guide plate body (11) is composed of a horizontal portion (111) and a vertical portion (112), so that the first guide plate body (11) is L-shaped; the fixing holes include a first fixing hole (12), and the first fixing hole (12) is opened at the connection between the horizontal portion (111) and the vertical portion (112).
4. A guide plate for high tibial osteotomy and angle adjustment according to claim 3, characterized in that: One end of the horizontal portion (111) away from the vertical portion (112) is connected to one end of the vertical portion (112) away from the horizontal portion (111) via a connecting portion (15); the inner surface of the connecting portion (15) is also in an arc shape that is adapted to the surface of a human tibia.
5. A guide plate for high tibial osteotomy and angle adjustment according to claim 4, characterized in that: A second fixing block (19) is arranged in the middle of the horizontal portion (111) away from the connecting portion (15), and a first fixing block (18) is arranged in the middle of the connecting portion (15). Both the first fixing block (18) and the second fixing block (19) are extended toward one side of the outer surface of the osteotomy guide plate (1). A second fixing hole (13) is provided on the first fixing block (18), and a third fixing hole (14) is provided on the second fixing block (19).
6. A high tibial osteotomy and angle adjustment guide plate according to claim 5, characterized in that: The first fixing block (18) and the second fixing block (19) are both truncated cone-shaped, and the diameter of the first fixing block (18) and the second fixing block (19) on a side close to the human tibia is larger than the diameter of the side away from the human tibia.
7. A guide plate for high tibial osteotomy and angle adjustment according to claim 1, characterized in that: A handle (22) is fixedly connected to the second guide plate body (21).