Pressing and supporting bone grafting instrument for knee osteoarthritis minimally invasive surgery

Abstract

The utility model discloses a pressing support bone grafting instrument for knee osteoarthritis minimally invasive surgery, which belongs to the technical field of surgical instruments, and comprises an osteotomy device main body and a pressing rod, a first through hole is arranged in the middle of the osteotomy device main body, the first through hole is matched with the pressing rod, the pressing rod is detachably arranged in the first through hole, and the pressing rod is matched with the pressing rod. The first through hole is formed in the periphery of the osteotomy device body and can move back and forth in the depth direction of the first through hole, through grooves are formed in the edge of the osteotomy device body and formed in the periphery of the first through hole, an operation osteotome used for osteotomy can be inserted into the through grooves, and nail holes are formed in the four corners of the osteotomy device body. The pressurizing and supporting bone grafting instrument for the knee osteoarthritis minimally invasive surgery is simple in structure, convenient to operate and capable of accurately positioning and shortening the surgery time.

Description

Technical Field

[0001] The utility model belongs to the technical field of surgical instruments, and more specifically relates to a compression support bone grafting instrument used for minimally invasive surgery of knee osteoarthritis. Background Art

[0002] At present, patients with knee osteoarthritis cannot effectively relieve joint pain symptoms through drug treatment alone. More severe knee osteoarthritis will cause severe pain and joint deformity. Arthroscopic debridement, joint fusion and total knee replacement are usually used. Since knee replacement requires implantation of prostheses to enable normal movement of the knee joint, joint replacement is expensive, has a large wound, a long recovery period, and is prone to joint infection. Therefore, other surgical methods need to be actively explored. Under the concept of advocating step-by-step treatment of knee osteoarthritis, knee preservation treatment is increasingly valued. Utility Model Content

[0003] The main purpose of the utility model is to provide a compression support bone grafting instrument used for minimally invasive surgery of knee osteoarthritis, which has a simple structure, is easy to operate and shortens the operation time.

[0004] According to the first aspect of the utility model, a pressure support bone grafting instrument for minimally invasive surgery of knee osteoarthritis is provided, comprising an osteotome body and a pressure rod, a first through hole is opened in the middle of the osteotome body, the first through hole is adapted to the pressure rod, the pressure rod is detachably arranged in the first through hole, and can move back and forth along the depth direction of the first through hole, the edges of the osteotome body are provided with through grooves, a plurality of the through grooves are arranged on the periphery of the first through hole, a surgical bone knife for osteotomy can be inserted into the through grooves, and nail holes are opened at the four corners of the osteotome body.

[0005] In a specific embodiment of the utility model, the pressing rod includes a hand-held rod and a pressing head, the hand-held rod is fixedly connected to the pressing head, and the pressing head can move back and forth along the depth direction of the first through hole.

[0006] In a specific embodiment of the present invention, the first through hole is a rectangular structure, the pressing head is a rectangular structure, and the pressing head is adapted to the first through hole.

[0007] In a specific embodiment of the present invention, a protrusion is provided at one end of the pressing head away from the hand-held rod.

[0008] In a specific embodiment of the present invention, the protrusion is a wolf-tooth-shaped structure or a spherical structure with a frosted surface.

[0009] In a specific embodiment of the utility model, an end of the hand-held rod away from the pressing head is provided with anti-slip grooves.

[0010] In a specific embodiment of the present invention, the outer diameter of the pressing head is smaller than the outer diameter of the first through hole.

[0011] In a specific embodiment of the present invention, the width of the through groove is greater than the thickness of the surgical osteotome.

[0012] In a specific embodiment of the present invention, the length of the first through hole is 1.76 cm to 2.64 cm, the width of the first through hole is 0.96 cm to 1.44 cm, and the height of the osteotome body is 0.4 to 0.6 cm.

[0013] In a specific embodiment of the present invention, the length of the suppressing rod is 1.76 cm to 2.64 cm, the width of the suppressing rod is 0.96 cm to 1.44 cm, and the height of the suppressing rod is 0.4 to 0.6 cm.

[0014] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:

[0015] This compression support bone grafting instrument for minimally invasive surgery of knee osteoarthritis fixes the osteotome body at the middle position between the medial edge of the tibial tuberosity and the medial edge of the tibial plateau through the nail hole, and the surgical bone knife can be inserted into the through groove to perform osteotomy. After osteotomy, the surgical bone knife is taken out, and the compression rod is placed at the first through hole of the osteotome body to vertically compress the severed cortical bone backwards, and then the iliac bone block is compressed. This compression support bone grafting instrument for minimally invasive surgery of knee osteoarthritis has a simple structure and is easy to operate. It can not only accurately position, but also shorten the operation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0017] Figure 1 It is a schematic diagram of the structure of a compression support bone grafting device used for minimally invasive surgery of knee osteoarthritis in one embodiment of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the main body of the osteotome in one embodiment of the utility model;

[0019] Figure 3 It is a structural schematic diagram of an embodiment of the present invention in which the bottom of the pressing rod is a spherical structure;

[0020] Figure 4 It is a structural schematic diagram of an embodiment of the utility model in which the bottom of the pressing rod is a wolf-tooth-shaped structure. DETAILED DESCRIPTION

[0021] After a large number of clinical observations, the inventor found that most patients with knee osteoarthritis have changes in the low-density area under the tibial plateau. Through finite element analysis, it is proved that it is highly correlated with the progression of varus deformity. Varus deformity in patients with knee osteoarthritis is a visible pathological change. It is summarized that a total of 2,215 patients with knee osteoarthritis and hospitalized for total knee replacement in the Third Affiliated Hospital of Guangzhou University of Chinese Medicine from 2018 to 2022 (excluding valgus deformity), of which 1,736 patients were hospitalized for surgery at the time of initial diagnosis, and 479 patients underwent total knee replacement after conservative treatment (within 2 years) after the initial diagnosis. The conservative treatment time of 479 patients was analyzed. As the conservative treatment time prolonged, the number of cases with gradually aggravated KL grade and varus deformity gradually increased. The inventor found that by enhancing the bone density under the tibial plateau, the redistribution of knee joint mechanics can be effectively improved, delaying or even reversing the progression of the disease. Based on this, the inventor developed the utility model of a compression support bone grafting device for minimally invasive surgery of knee osteoarthritis.

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be internal connection between two elements, indirect connection, or an interactive relationship between two elements.

[0027] The following disclosure provides many different embodiments or examples for implementing different solutions of the present invention.

[0028] Reference Figures 1 to 4 As shown, a compression support bone grafting instrument for minimally invasive surgery of knee osteoarthritis is provided, including an osteotome body 1 and a compression rod 2. A first through hole 11 is opened in the middle of the osteotome body 1, and the first through hole 11 is adapted to the compression rod 2. The compression rod 2 is detachably arranged in the first through hole 11 and can move back and forth along the depth direction of the first through hole 11. Through grooves 12 are provided on the edges of the osteotome body 1, and a plurality of through grooves 12 are arranged on the periphery of the first through hole 11. A surgical bone knife for osteotomy can be inserted into the through grooves 12, and nail holes 13 are opened at the four corners of the osteotome body 1.

[0029] In this embodiment, the osteotome body 1 is fixed to the middle position between the medial edge of the tibial tuberosity and the medial edge of the tibial plateau of the patient through the nail hole 13, a special nail is driven into the nail hole 13 for temporary fixation, and then a surgical bone knife is inserted into the through groove 12 for osteotomy; after osteotomy, the surgical bone knife is taken out, and the pressure rod 2 is placed at the first through hole 11 of the osteotome body 1 to vertically press the cut cortical bone backward. Preferably, the bottom of the pressure rod 2 is divided into two structures, one of which is a spherical structure with a frosted surface, which can make the pressure stress more uniform; the other is a wolf tooth structure. After the bone groove is formed on the inner side of the proximal end of the patient's tibia, an iliac bone block of corresponding size is taken for bone grafting to fill the bone groove, and the pressure rod 2 of the wolf tooth structure is used for pressing until it is flush with the host bone surface, so that the pressure stress is more concentrated. The pressure support bone grafting instrument for minimally invasive surgery of knee osteoarthritis has a simple structure and is easy to operate, which can not only accurately position, but also shorten the operation time.

[0030] In one embodiment of the utility model, the pressing rod 2 includes a hand-held rod 21 and a pressing head 22. The hand-held rod 21 is fixedly connected to the pressing head 22, and the pressing head 22 can move back and forth along the depth direction of the first through hole 11. The first through hole 11 is a rectangular structure, and the pressing head 22 is also a rectangular structure. Therefore, the pressing head 22 is adapted to the first through hole 11. At the same time, in order to facilitate the pressing head 22 to enter the first through hole 11, the outer diameter of the pressing head 22 is smaller than the outer diameter of the first through hole 11, so that the pressing head 22 can move back and forth in the first through hole 11.

[0031] Preferably, an end of the hand-held rod 21 away from the pressing head 22 is provided with anti-slip grooves to prevent slipping due to unstable grip during surgery.

[0032] In one embodiment of the utility model, a protrusion 221 is provided at one end of the pressing head 22 away from the hand-held rod 21. The protrusion 221 is a wolf-tooth-shaped structure or a spherical structure with a frosted surface. When the protrusion 221 is a wolf-tooth-shaped structure, the pressing stress of the pressing rod 2 is more concentrated, and it is used to take iliac bone blocks of corresponding sizes for bone grafting to fill the bone groove after the bone groove is formed on the inner side of the proximal tibia, and then use the pressing rod 2 to press the iliac bone blocks; when the protrusion 221 is a spherical structure with a frosted surface, the pressing stress of the pressing rod 2 is more uniform, and it is used to press the rectangular cortical bone with the four walls cut off vertically toward the rear.

[0033] In one embodiment of the utility model, in order to facilitate the insertion of the surgical bone knife into the through groove 12, the width of the through groove 12 is greater than the thickness of the surgical bone knife.

[0034] In one embodiment of the utility model, the height of the osteotome body 1 is 0.4-0.6 cm, the length of the first through hole 11 is 1.76 cm-2.64 cm, and the width of the first through hole 11 is 0.96 cm-1.44 cm. Preferably, the height of the osteotome body 1 is 0.5 cm, the length of the first through hole 11 is 2.2 cm, and the width is 1.2 cm, which is more in line with the size of the human leg bone, and the depth of the surgical bone knife is 0.5 cm.

[0035] Furthermore, the length of the suppression rod 2 is 1.76cm to 2.64cm, the width of the suppression rod 2 is 0.96cm to 1.44cm, and the height of the suppression rod 2 is 0.4 to 0.6cm. Preferably, the length of the suppression rod 2 is 2.2cm, the width is 1.2cm, and the height is 0.5cm, so as to be compatible with the osteotomy device body 1 and better cooperate in the treatment of knee osteoarthritis.

[0036] In a specific embodiment, the surgical procedure is as follows:

[0037] The autologous ilium, about 2.2*1.2cm in size, was taken for use; a longitudinal incision was made on the anterior medial side of the proximal tibia, 1cm inward from the medial edge of the tibial tubercle, the proximal end of the incision was 1cm below the tibial plateau, and the distal end was extended to the upper edge of the anserine tendon group, about 2.5cm long, exposing the anterior medial bone cortex of the tibial plateau, and the osteotomy instrument of the utility model was placed, and the upper wall and the bone surface were determined to be in the middle position between the medial edge of the tibial tubercle and the medial edge of the tibial plateau, 1cm below the medial tibial plateau, and the special nails were driven into the four corner nail holes of the osteotomy instrument for temporary Fixation, use a 0.5cm limited depth surgical bone knife to perform osteotomy in the four hollow grooves of the wall in turn. After osteotomy, take out the surgical bone knife, put the frosted spherical structure pressing rod 2 in the hollow of the osteotomy body 1, and press the rectangular cortical bone of the four walls vertically backward until it is pressed and compacted evenly. After the bone groove is formed on the inner side of the proximal tibia, take the iliac bone block of corresponding size for bone grafting to fill the bone groove, and then use the wolf tooth structure pressing rod 2 to press the iliac bone block until it is flush with the host bone surface. If necessary, use two cancellous bone screws to fix the iliac bone block. Under the perspective of the C-arm machine, the bone block is located below the subchondral bone. If the position is satisfactory, it can be flushed and sutured.

[0038] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A compression support bone grafting instrument for minimally invasive surgery for knee osteoarthritis, comprising an osteotome body (1) and a compression rod (2), characterized in that: A first through hole (11) is provided in the middle of the osteotome body (1), the first through hole (11) is adapted to the pressing rod (2), the pressing rod (2) is detachably arranged in the first through hole (11), and can move back and forth along the depth direction of the first through hole (11), the edges of the osteotome body (1) are provided with through grooves (12), a plurality of the through grooves (12) are arranged on the periphery of the first through hole (11), a surgical bone knife for osteotomy can be inserted into the through grooves (12), and nail holes (13) are provided at the four corners of the osteotome body (1).

2. The compression support bone grafting device for minimally invasive surgery of knee osteoarthritis according to claim 1, characterized in that: The pressing rod (2) comprises a hand-held rod (21) and a pressing head (22); the hand-held rod (21) is fixedly connected to the pressing head (22); and the pressing head (22) can move back and forth along the depth direction of the first through hole (11).

3. The compression support bone grafting device for minimally invasive surgery of knee osteoarthritis according to claim 2, characterized in that: The first through hole (11) is a rectangular structure, the pressing head (22) is a rectangular structure, and the pressing head (22) is compatible with the first through hole (11).

4. The compression support bone grafting device for minimally invasive surgery of knee osteoarthritis according to claim 2, characterized in that: A protrusion (221) is provided at one end of the pressing head (22) away from the hand-held rod (21).

5. The compression support bone grafting device for minimally invasive surgery of knee osteoarthritis according to claim 4, characterized in that: The protrusion (221) is a wolf-tooth-shaped structure or a spherical structure with a frosted surface.

6. The compression support bone grafting device for minimally invasive surgery of knee osteoarthritis according to claim 2, characterized in that: An end of the hand-held rod (21) away from the pressing head (22) is provided with anti-slip grooves.

7. The compression support bone grafting device for minimally invasive surgery of knee osteoarthritis according to claim 2, characterized in that: The outer diameter of the pressing head (22) is smaller than the outer diameter of the first through hole (11).

8. The compression support bone grafting device for minimally invasive surgery of knee osteoarthritis according to claim 1, characterized in that: The width of the through groove (12) is greater than the thickness of the surgical osteotome.

9. The compression support bone grafting device for minimally invasive surgery of knee osteoarthritis according to claim 1, characterized in that: The length of the first through hole (11) is 1.76 cm to 2.64 cm, the width of the first through hole (11) is 0.96 cm to 1.44 cm, and the height of the osteotome body (1) is 0.4 cm to 0.6 cm.

10. The compression support bone grafting device for minimally invasive surgery of knee osteoarthritis according to claim 1, characterized in that: The length of the suppressing rod (2) is 1.76 cm to 2.64 cm, the width of the suppressing rod (2) is 0.96 cm to 1.44 cm, and the height of the suppressing rod (2) is 0.4 cm to 0.6 cm.

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