Auxiliary guide plate for high tibial osteotomy

Abstract

The utility model belongs to the technical field of medical auxiliary tools, and particularly relates to an auxiliary guide plate for high tibial osteotomy. The guide plate comprises a guide plate body, the first cutting groove is transversely formed in the guide plate body; the second cutting groove is vertically formed in the edge of the guide plate body; the at least two first screw holes are formed in the corresponding guide plate body above the first cutting groove and are distributed on the two sides of the guide plate body; the at least one second screw hole is formed in the corresponding guide plate body below the first cutting groove; the guide plate body is of a fan-shaped structure. The guide plate body is of a fan-shaped structure, the occupied space is small, on the premise that the function of the auxiliary guide plate is guaranteed, the size of the auxiliary guide plate is reduced as much as possible, stripping of the medial collateral ligament of the knee joint of a patient in an operation is reduced, and the problems that in the prior art, a quadrilateral guide plate is large in size and inconvenient to operate are solved. And more soft tissues and ligament attachment points on the inner side of the knee joint of the patient are stripped.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical auxiliary tools, and particularly relates to an auxiliary guide plate for high tibial osteotomy. Background Art

[0002] Most patients with knee osteoarthritis suffer from varus deformity of the knee joint. Due to the deformity of the patient's tibia, the mechanical force line of the lower limb is varus deformed, which causes uneven force on the patient's knee joint, causing knee pain or abnormal gait.

[0003] In medicine, high tibial osteotomy is the most commonly used treatment for patients with varus knee deformity. This osteotomy adjusts the patient's lower limb alignment, corrects the deformity, and thereby relieves leg pain and improves quality of life. During a high tibial osteotomy, the position and angle of the patient's lower limb alignment are analyzed and determined. An auxiliary guide is then used to position the patient's tibia, and an oscillating saw is used to perform the cut. Once the patient's lower limb alignment is achieved, a plate is used to secure the adjusted lower limb bones, completing the procedure.

[0004] Existing auxiliary guides are often 3D-printed in one piece. Their overall quadrilateral structure occupies a large space and has a large opening at the knee joint, which causes extensive stripping of the collateral ligament on the medial side of the proximal tibia, causing significant harm to the patient. Furthermore, existing auxiliary guides have numerous positioning holes for situating the tibia, requiring subsequent re-drilling of the plate. This additional hole not only increases the risk of injury but also significantly increases surgical risks such as infection. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects in the prior art of requiring a large opening of the patient's lower limb, more stripping of the collateral ligament on the inner side of the proximal tibia, and more drilling positioning positions, which cause greater harm to the patient and surgical risks, and provide an auxiliary guide for high tibial osteotomy with a smaller size, fewer drilling positions and reusable drilling holes.

[0006] The technical solution adopted by the utility model to solve the technical problem is: an auxiliary guide plate for high tibial osteotomy, comprising:

[0007] Guide plate body;

[0008] a first cutting groove, transversely arranged on the guide plate body, for guiding the osteotomy saw blade to perform transverse cutting on the patient's tibia;

[0009] a second cutting groove, vertically provided on the edge of the guide body, for guiding the osteotomy saw blade to perform a lateral vertical cut on the patient's tibia;

[0010] At least two first screw holes are provided on the guide plate body corresponding to the first cutting groove and distributed on both sides of the guide plate body;

[0011] At least one second screw hole is provided on the guide plate body corresponding to the lower portion of the first cutting groove; wherein,

[0012] The guide plate body is in a fan-shaped structure; when in use, the bone-contacting surface of the guide plate body is arranged to fit the tibia at the surgical position of the patient.

[0013] Furthermore, the guide plate body includes a fan body portion and a fan handle portion fixedly arranged below the fan body portion; wherein,

[0014] The first cutting groove is arranged at a connection between the fan body and the fan handle, and the second cutting groove is arranged at a side edge of the fan body.

[0015] Furthermore, the first screw holes include two, and the two first screw holes are respectively arranged on both sides of the fan body.

[0016] Furthermore, the first screw holes include three, and the three first screw holes are arranged side by side laterally at the distal end of the fan body.

[0017] Furthermore, the second screw hole includes one, and the second screw hole is arranged on the fan handle.

[0018] Furthermore, the first cutting groove and the second cutting groove are both provided with a guide boss, and the guide boss is provided on the dorsal surface of the guide plate body; wherein,

[0019] The guide boss is arranged around the first cutting groove and / or the second cutting groove.

[0020] Furthermore, it also includes a third screw hole, which is arranged on the fan body and located between the first screw hole and the first cutting groove.

[0021] Furthermore, the first screw hole and / or the second screw hole and / or the third screw hole are regular holes or special-shaped holes.

[0022] Furthermore, the first screw hole, the second screw hole and the third screw hole are each provided with a positioning column for guiding the insertion of the screw;

[0023] The shape of the positioning column is adapted to the shape of the corresponding first screw hole, second screw hole or third screw hole.

[0024] Furthermore, the drill hole on the patient's tibia corresponding to the second screw hole is used as a D hole for subsequent plate fixation.

[0025] The beneficial effects of an auxiliary guide plate for high tibial osteotomy of the present invention are as follows: the guide plate body of the present invention is arranged in a fan-shaped structure, which occupies less space than the guide plate with a quadrilateral structure in the prior art, and is provided with a first cutting groove in the transverse direction of the guide plate body and a second cutting groove in the longitudinal direction of the edge of the guide plate body. Under the premise of ensuring the function of the auxiliary guide plate, the volume of the auxiliary guide plate is reduced as much as possible, that is, the coverage area of ​​the auxiliary guide plate is reduced, and the stripping of the medial collateral ligament of the patient's knee joint during surgery is reduced. There is no need to perform a large stripping on the medial side of the proximal tibia of the patient, and stable transverse and longitudinal cutting of the patient's tibia can be achieved, thereby solving the problem that the quadrilateral guide plate in the prior art is large in volume and causes greater damage to the patient's legs, thereby ensuring the postoperative stability and faster recovery of the knee joint.

[0026] Meanwhile, in the prior art, a quadrilateral guide plate requires at least four screw holes to be fixed to the patient's tibia, requiring a large number of drill holes to be drilled in the patient's tibia. The present invention designs the guide plate body into a fan-shaped structure. Only two first screw holes are required above the fan body, and one second screw hole is provided on the fan handle to achieve a more stable fixation of the guide plate body to the patient's tibia corresponding to the surgical position, thereby avoiding the shortcomings of the prior art that cause greater harm to the patient and higher surgical risks. The second screw hole is also used for subsequent fixation of the steel plate. When the steel plate is fixed, one less drill hole is drilled in the bone, further solving the problem of excessive damage to the patient caused by multiple drill holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0028] Figure 1 This is a three-dimensional view of the auxiliary guide plate fitting surface of the first embodiment of the present invention.

[0029] Figure 2 This is a three-dimensional view of the auxiliary guide plate from the dorsal bone surface perspective of the first embodiment of the present invention.

[0030] Figure 3 It is a three-dimensional diagram of the auxiliary guide plate of the second embodiment of the present utility model.

[0031] Figure 4 This is a three-dimensional view of the auxiliary guide plate of the third embodiment of the present invention from the perspective of the back bone surface.

[0032] Figure 5 This is a three-dimensional view of the auxiliary guide plate fitting surface of the third embodiment of the present invention.

[0033] In the figure: 1. Guide plate body, 11. Fan body, 12. Fan handle, 2. First cutting groove, 3. Second cutting groove, 4 / 4-2 / 4-3. First screw hole, 5. Second screw hole, 6. Third screw hole, 7. Positioning column, 8. Guide boss. DETAILED DESCRIPTION

[0034] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0035] Example 1

[0036] like Figure 1-Figure 2 The specific embodiment of the auxiliary guide plate for high tibial osteotomy of the present invention shown includes: a guide plate body 1, a first cutting groove 2 arranged horizontally on the guide plate body 1 for guiding the osteotomy saw blade to perform a transverse cut on the patient's tibia, a second cutting groove 3 arranged vertically on the edge of the guide plate body 1 for guiding the osteotomy saw blade to perform a lateral vertical cut on the patient's tibia, and at least two first screw holes 4 and at least one second screw hole 5. Among them, at least two first screw holes 4 are arranged on the guide plate body 1 corresponding to the upper side of the first cutting groove 2 and are distributed on both sides of the guide plate body 1; at least one second screw hole 5 is arranged on the guide plate body 1 corresponding to the lower side of the first cutting groove 2. It should be further explained that the guide plate body 1 in this embodiment 1 has a fan-shaped structure.

[0037] In this embodiment 1, Figure 2 As shown, the guide body 1 comprises a sector 11 and a handle 12 fixedly disposed below the sector 11. A first cutting groove 2 is provided at the junction of the sector 11 and the handle 12, and a second cutting groove 3 is provided on a side edge of the sector 11. During use, the bone-contacting surface of the guide body 1 is positioned against the patient's tibia at the surgical site, with the sector 11 positioned above the sector 11.

[0038] like Figure 1 and Figure 2 As shown, the first screw holes 4 in the first embodiment include two, and the two first screw holes 4 are respectively arranged on both sides of the fan body 11 , and the second screw hole 5 includes one, and the one second screw hole 5 is arranged on the fan handle 12 .

[0039] The guide plate body 1 of the first embodiment of the present invention is arranged in a fan-shaped structure, which occupies less space than the guide plate with a quadrilateral structure in the prior art, and is provided with a first cutting groove 2 in the transverse direction of the guide plate body 1 and a second cutting groove 3 in the longitudinal direction of the edge of the guide plate body 1. Under the premise of ensuring the function of the auxiliary guide plate, the volume of the auxiliary guide plate is reduced as much as possible, that is, the coverage area of ​​the auxiliary guide plate is reduced, and the stripping of the medial collateral ligament of the patient's knee joint during surgery is reduced. There is no need to perform a large stripping on the medial side of the proximal tibia of the patient, and stable transverse and longitudinal cutting of the patient's tibia can be achieved, thereby solving the problem that the quadrilateral guide plate in the prior art is large in volume and causes greater damage to the patient's legs, thereby ensuring the postoperative stability and faster recovery of the knee joint.

[0040] In the first embodiment of the present invention, the fan handle portion 12 of the guide plate body 1 is arranged at the rear end of the fan body portion 11, and a second screw hole 5 is provided on the fan handle portion 12 to ensure the precise positioning of the auxiliary guide plate. Two first screw holes 4 are provided above the fan body portion 11. Three screw holes can accurately and stably position and fix the guide plate body 1. Compared with the existing technology, the number of screw holes is greatly reduced, the number of holes drilled in the patient's tibia is reduced, and the patient's recovery time and infection risk are reduced.

[0041] It should be further explained that the second screw hole 5 in this embodiment corresponds to a drill hole on the patient's tibia, which is used for subsequent plate fixation. The D hole on the plate is a threaded hole in the middle of the plate for inserting a fixation nail into the tibia. This should be understood and understood by those skilled in the art, and will not be elaborated on in detail here. In the prior art, a quadrilateral guide plate requires at least four screw holes to be fixed to the patient's tibia, which requires a large number of drill holes to be drilled on the patient's tibia. The present invention designs the guide plate body 1 into a fan-shaped structure. Only two first screw holes 4 are required above the fan body 11, and a second screw hole 5 is provided on the fan handle 12 to achieve a more stable fixation of the guide plate body 1 to the patient's tibia corresponding to the surgical position, thereby avoiding the shortcomings of the prior art that cause greater harm to the patient and higher surgical risks. The location of the second screw hole 5 is used for subsequent plate fixation. When the plate is fixed, one less drill hole is opened in the bone, further solving the problem of excessive damage to the patient caused by multiple drill holes.

[0042] The first cutting groove 2 and the second cutting groove 3 in the first embodiment are both provided with a guide boss 8, and the guide boss 8 is provided on the dorsal bone surface of the guide plate body 1; wherein, the guide boss 8 is arranged around the first cutting groove 2 and / or the second cutting groove 3. The first screw hole 4 and / or the second screw hole 5 are regular holes or special-shaped holes, and the first screw hole 4 and the second screw hole 5 are provided with a positioning column 7 for guiding the insertion of the nail. The shape of the positioning column 7 is adapted to the shape of the corresponding first screw hole 4 and the second screw hole 5. The first threaded hole and the second threaded hole in the first embodiment are both circular holes, and the shape of the corresponding positioning column 7 is also circular. The setting of the guide boss 8 guides the osteotomy saw blade to cut the corresponding position of the patient's tibia, thereby ensuring the accuracy of the cutting position. The setting of the positioning column 7 guides the fixing nail to enter the threaded hole, accurately positions the fixing nail, and ensures the accuracy of the installation of the guide plate body 1.

[0043] Example 2

[0044] like Figure 3 As shown, Example 2 is based on Example 1, with the following modifications: Three first screw holes 4-2 are provided, arranged side by side horizontally at the distal end of the fan body 11. Three first screw holes 4-2 are arranged side by side horizontally at the distal end of the fan body 11, away from the fan handle 12, to better ensure the stability of the guide body 1 and the patient's tibia. Furthermore, the second cutting groove 3-2 is positioned on the right side of the guide body 1. The position of the first cutting groove 3-2 can be adjusted left or right according to the patient's specific needs.

[0045] It should be understood that the number of the first screw holes 4 on the auxiliary guide plate is at least two, and can also be four, five, etc., because the fewer the number of first screw holes 4, the less harm to the patient. Therefore, any changes made by those skilled in the art on the basis of the first or second embodiment shall fall within the scope of protection of the present utility model.

[0046] Example 3

[0047] like Figure 4 and Figure 5 As shown, Example 3 is based on Example 1, with the following modifications: To further ensure the fixing stability of the guide plate body 1, a third screw hole 6 is further provided on the guide plate body 1. The third screw hole 6 is provided on the sector portion 11 and is located between the first screw hole 4-3 and the first cutting groove 2. There are three first screw holes 4-3. It should be understood that the first screw hole 4-3 and / or the second screw hole 5 and / or the third screw hole 6 in this Example 3 can be a regular hole or a special-shaped hole. The hole shapes of the first screw hole 4-3, the second screw hole 5 and the third screw hole 6 are no longer absolutely limited here.

[0048] Correspondingly, the first screw hole 4-3, the second screw hole 5 and the third screw hole 6 are all provided with positioning columns 7 for guiding nail insertion, and the shape of the positioning columns 7 is adapted to the shape of the corresponding first screw hole 4-3, the second screw hole 5 or the third screw hole 6.

[0049] It should be understood that the specific shape of the fan-shaped portion in either Example 1, Example 2 or Example 3 is a 3D print made according to the shape and position of the tibia of different patients. The bone-contacting surface of the fan-shaped portion can be fitted with the tibia of the corresponding patient. The specific shape of the fan-shaped portion will not be elaborated here, and those skilled in the art should be able to obtain it based on 3D technology.

[0050] It should be understood that the specific embodiments described above are only used to explain the present invention and are not intended to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. An auxiliary guide plate for high tibial osteotomy, characterized in that: include: Guide plate body (1); A first cutting groove (2) is transversely arranged on the guide plate body (1) and is used to guide the osteotomy saw blade to perform transverse cutting on the patient's tibia; A second cutting groove (3) is vertically arranged on the edge of the guide plate body (1) and is used to guide the osteotomy saw blade to perform a lateral vertical cutting on the patient's tibia; At least two first screw holes (4) are provided on the guide plate body (1) corresponding to the first cutting groove (2) and distributed on both sides of the guide plate body (1); At least one second screw hole (5) is provided on the guide plate body (1) corresponding to the lower portion of the first cutting groove (2); wherein, The guide plate body (1) is in a fan-shaped structure; when in use, the bone-contacting surface of the guide plate body (1) is arranged to fit the tibia at the surgical position of the patient.

2. The auxiliary guide plate for high tibial osteotomy according to claim 1, characterized in that: The guide plate body (1) comprises a fan body portion (11) and a fan handle portion (12) fixedly arranged below the fan body portion (11); wherein, The first cutting groove (2) is provided at a connection between the fan body (11) and the fan handle (12), and the second cutting groove (3) is provided at a side edge of the fan body (11).

3. The auxiliary guide plate for high tibial osteotomy according to claim 2, characterized in that: The first screw holes (4) include two, and the two first screw holes (4) are respectively arranged on both sides of the fan body (11).

4. The auxiliary guide plate for high tibial osteotomy according to claim 2, characterized in that: The first screw holes (4) include three, and the three first screw holes (4) are arranged side by side in a transverse direction at the distal end of the fan body (11).

5. The auxiliary guide plate for high tibial osteotomy according to claim 2, characterized in that: The second screw hole (5) includes one, and the second screw hole (5) is arranged on the fan handle (12).

6. The auxiliary guide plate for high tibial osteotomy according to claim 1, characterized in that: The first cutting groove (2) and the second cutting groove (3) are both provided with a guide boss (8), and the guide boss (8) is provided on the dorsal surface of the guide plate body (1); wherein, The guide boss (8) is arranged around the first cutting groove (2) and / or the second cutting groove (3).

7. The auxiliary guide plate for high tibial osteotomy according to claim 2, characterized in that: It also includes a third screw hole (6), which is arranged on the fan body (11) and located between the first screw hole (4) and the first cutting groove (2).

8. The auxiliary guide plate for high tibial osteotomy according to claim 7, characterized in that: The first screw hole (4) and / or the second screw hole (5) and / or the third screw hole (6) are regular holes or special-shaped holes.

9. The auxiliary guide plate for high tibial osteotomy according to claim 8, characterized in that: The first screw hole (4), the second screw hole (5) and the third screw hole (6) are all provided with positioning posts (7) for guiding the insertion of screws; The shape of the positioning column (7) is adapted to the shape of the corresponding first screw hole (4), second screw hole (5) or third screw hole (6).

10. The auxiliary guide plate for high tibial osteotomy according to any one of claims 1 to 9, characterized in that: The second screw hole (5) corresponds to the drill hole on the patient's tibia, which is used as a D hole for subsequent plate fixation.

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