Auxiliary device for osteochondral defect surgical treatment

Abstract

The utility model provides an osteochondral defect surgical treatment auxiliary device, including drill bit, drilling guide plate and depth control guide plate, drilling guide plate includes middle drilling area and two side fixed part, drilling area is curved and is equipped with the round hole in the center, depth control guide plate includes holding part and guide plate part, and the guide plate part is equipped with the round hole in the middle. The guide plate part is arranged in a curved shape, the radian of the guide plate part is consistent with that of the drilling area, a transverse groove is formed in the guide plate part, the width of the transverse groove is smaller than the diameter of the round hole of the drilling area, the guide plate part is arranged above the drilling area, and the drill bit sequentially penetrates through the transverse groove and the round hole from the upper portion to extend to the repairing area. The drilling guide plate and the depth control guide plate which are attached to the surface of the defect are selected, and the drill bit penetrates through the depth control guide plate and the drilling guide plate to reach the surface of the defect; through cooperative use of the depth control guide plate and the drilling guide plate, the size and depth of the defect can be accurately controlled, a conical damage model with a large bottom and a small opening is formed, errors caused by manual operation are reduced, and the risk that the implant falls off can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of basic medical research, and specifically, to an auxiliary device for surgical treatment of osteochondral defects. Background Art

[0002] Bone and / or cartilage injuries are relatively common clinically. After bone and / or cartilage injuries occur, timely repair is required to prevent further expansion of the injuries. Since the defects are generally irregular, when treating bone or cartilage defects clinically, it is sometimes necessary to trim the edges of the defects to facilitate the transplantation of autologous or allogeneic materials.

[0003] The existing Chinese patent with the publication number CN218899793U discloses an auxiliary fixing device for constructing a rabbit knee osteochondral defect model, which is only applicable to modeling on the cartilage of the rabbit knee joint and cannot be used for other animals or other parts, lacking universality.

[0004] At present, the basic principle of osteochondral transplantation surgery in the market is to locate the cartilage wear position through a positioning tool and drill holes in the worn area using a reamer. However, the edges of the osteochondral taken out by hitting the transplantor with a hammer are not neat, which is easy to cause cartilage fragmentation and is not easy to position, and is prone to deviating from the predetermined area. When taking cartilage by hitting the transplantor with a hammer, the impact is large, which is easy to cause secondary soft tissue injury to the patient. Due to the differences in individuals and the positions of the defects, surgeons sometimes need to rely on experience, eyesight and even touch for anatomical positioning, and perform alignment and counterpoint through methods such as manual marking and flexing and extending the knee joint to pose, which brings great errors and uncertainties to the treatment. And the standardization of the instruments also makes the surgery unable to be customized according to different individuals.

[0005] For cartilage injuries, the most common treatment option is autologous or allogeneic cartilage transplantation. However, after autologous and allogeneic cartilage transplantation, complications such as fixation failure, cartilage detachment, the fixation being higher than the joint surface, or the fixation being too hard, resulting in wear of the opposite (contralateral) cartilage may occur.

[0006] Therefore, the inventor believes that there is a need to provide an auxiliary device for surgical treatment of osteochondral defects, which can accurately control the size and depth of the defects, reduce the errors caused by manual operations, and can effectively reduce the risk of implant detachment. Summary of the Utility Model

[0007] Aiming at the defects in the prior art, the purpose of the utility model is to provide an auxiliary device for surgical treatment of osteochondral defects.

[0008] An auxiliary device for surgical treatment of osteochondral defects provided by the present utility model includes: a drill bit, a drilling guide plate, and a depth control guide plate. The drilling guide plate includes a central drilling area and two side fixing parts. The drilling area is curved and has a circular hole in the center. The depth control guide plate includes a holding part and a guide plate part. The guide plate part is curved and has the same radian as the drilling area. The guide plate part is provided with a transverse groove, and the width of the transverse groove is smaller than the diameter of the circular hole in the drilling area. The guide plate part is arranged above the drilling area, and the drill bit extends from above through the transverse groove and the circular hole to the repair area.

[0009] Preferably, the radian of the drilling area is the same as the radian of the area to be operated on.

[0010] Preferably, the guide plate part is attached to the drilling area and is perpendicular to the drilling guide plate.

[0011] Preferably, the length of the transverse groove of the guide plate part is greater than the diameter of the circular hole in the drilling area.

[0012] Preferably, the end of the drill head of the drill bit is a cutting plane.

[0013] Preferably, a stepped limiting device is arranged on the drill bit. The stepped limiting device includes a first step and a second step. The diameter of the first step is smaller than the width of the transverse groove, and the diameter of the second step is greater than the width of the transverse groove.

[0014] Preferably, a sleeve is sleeved outside the stepped limiting device. Screws are arranged on both sides of the sleeve. The stepped limiting device is fixedly installed on the drill bit through the cooperation of the sleeve and the screws.

[0015] Preferably, both the drilling guide plate and the depth control guide plate are metal plates.

[0016] Preferably, the stepped limiting device is a metal cylinder.

[0017] Compared with the prior art, the present utility model has the following beneficial effects:

[0018] 1. By selecting a drilling guide plate that fits the surface of the repair area, placing the drilling guide plate on the repair area, with the depth control guide plate located above the drilling guide plate and perpendicular to it, the drill bit passes through the depth control guide plate and the drilling guide plate to reach the defect surface. Through the combined use of the depth control guide plate and the drilling guide plate, the size and depth of the defect can be accurately controlled, reducing errors caused by manual operation. During the drilling operation, by changing the direction of the drill bit, a conical damage model with a large bottom and a small mouth can be created, effectively reducing the risk of implant detachment.

[0019] 2. The utility model is provided with a stepped limiting device with adjustable height on the drill bit. The stepped limiting device includes a first step and a second step. The diameter of the first step is smaller than the width of the transverse groove, and the diameter of the second step is larger than the width of the transverse groove. The first step can enter the transverse groove of the guide plate part to protect the edge of the circular hole in the drilling area from being cut by the side edge of the drill bit. The width of the second step is larger than the width of the transverse groove, so the second step is blocked by the transverse groove to achieve the limiting function. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects, and advantages of the present utility model will become more apparent by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 It is a schematic structural diagram mainly showing the drill bit of the present utility model;

[0022] Figure 2 It is a schematic diagram mainly showing the combined use of the drilling guide plate and the depth control guide plate of the present utility model;

[0023] Figure 3 It is a schematic structural diagram mainly showing the drilling guide plate of the present utility model;

[0024] Figure 4 It is a schematic structural diagram mainly showing the depth control guide plate of the present utility model;

[0025] Figure 5 It is a schematic structural diagram mainly showing the sleeve on the drill bit of the present utility model.

[0026] REFERENCE MARKS:

[0027] Drill bit 1, Drilling guide plate 2, Depth control guide plate 3

[0028] Stepped limiting device 11, Sleeve 12, Drilling area 21

[0029] Fixing part 22, Holding part 31, Guide plate part 32

[0030] First step 111, Second step 112, Screw 121 DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The present utility model will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present utility model, but do not limit the present utility model in any form. It should be noted that those of ordinary skill in the art can make several changes and improvements without departing from the concept of the present utility model. These all belong to the protection scope of the present utility model.

[0032] As Figures 1-5As shown, a surgical treatment assistance device for osteochondral defect according to the present utility model includes: a drill bit 1, a drilling guide plate 2, and a depth control guide plate 3. The drilling guide plate 2 includes a central drilling area 21 and two side fixing parts 22. The drilling area 21 is curved and has a circular hole at the center. The depth control guide plate 3 includes a holding part 31 and a guide plate part 32. The guide plate part 32 is curved and has the same curvature as the drilling area 21. The guide plate part 32 is provided with a transverse groove, and the width of the transverse groove is smaller than the diameter of the circular hole in the drilling area 21. The guide plate part 32 is arranged above the drilling area 21, and the drill bit 1 extends from above through the transverse groove and the circular hole to the repair area. Preferably, the materials of the drilling guide plate 2, the depth control guide plate 3, and the stepped limiting device 11 are metals.

[0033] The curvature of the drilling area 21 is the same as that of the area to be operated, either concave or convex, and the curvature of the guide plate part 32 matches it. The two sides of the drilling area 21 extend outwards to form two side fixing parts 22. The fixing parts 22 are generally provided with multiple bends. According to different surgical sites, the positions and amplitudes of the bends are also different, mainly to ensure that the drilling area 21 can closely adhere to the area to be operated.

[0034] The guide plate part 32 is narrower than the holding part 31, and the holding part 31 is generally a flat plate. The guide plate part 32 is attached to the drilling area 21, and the guide plate part 32 is perpendicular to the drilling guide plate 2.

[0035] The length of the transverse groove of the guide plate part 32 is greater than the diameter of the circular hole in the drilling area 21.

[0036] The end of the drill head of the drill bit 1 is a cutting plane.

[0037] A stepped limiting device 11 with adjustable height is arranged on the drill bit 1. The stepped limiting device 11 includes a first step 111 and a second step 112. The diameter of the first step 111 is smaller than the width of the transverse groove, and the diameter of the second step 112 is greater than the width of the transverse groove. The first step 111 of the stepped limiting device 11 can enter the transverse groove of the guide plate part 32 of the depth control guide plate 3 to protect the edge of the circular hole in the drilling area 21 of the drilling guide plate 2 from being cut by the side cutting edge of the drill bit 1. The width of the second step 112 is greater than the width of the transverse groove, so the second step 112 is blocked by the transverse groove to achieve the limiting function.

[0038] A sleeve 12 is sleeved outside the stepped limiting device 11, and screws 121 are arranged on both sides of the sleeve 12. By moving the stepped limiting device 11 and tightening and installing the stepped limiting device 11 on the drill bit 1 through the cooperation of the sleeve 12 and the screws 121, the adjustment of the drilling depth of the drill bit 1 can be achieved.

[0039] In some specific embodiments, a support fixing device can be used to fix the drilling guide plate.

[0040] In this application, by examining the shape and size of the bone and / or cartilage at the defect site of the patient, a drilling guide plate 2 that fits the surface of the defect site is selected. During operation, the drilling guide plate 2 is placed in the area to be operated on. The depth control guide plate 3 is located above the drilling guide plate 2 and is perpendicular to the drilling guide plate 2. The drill bit shank at the rear of the drill bit 1 is clamped at the front end of various electric drills with clamping structures, and the front part is the drill head part. The drill head part passes through the depth control guide plate 3 and the drilling guide plate 2 to reach the defect surface, and turning on the electric drill can create the defect.

[0041] This application is described by taking the rabbit knee joint modeling surgery as an example. The diameter of the central circular hole of the drilling guide plate 2 is 5 mm; the width of the transverse groove on the guide plate part 32 of the depth control guide plate 3 is 2.5 mm, and the length is 15 mm; the head diameter of the drill bit 1 is 2 mm. In order to better fix the osteochondral defect surgical treatment auxiliary device at the popliteal fossa, grooves are made on the high-density foam marked by the anatomical structure of the rabbit knee joint, and the grooves are adapted to the placement of the thigh and calf.

[0042] During the operation, place the hind leg of the rabbit on the high-density foam. The assistant holds the drilling guide plate 2 by hand and aligns the circular hole in the drilling area 21 with the trochlea of the rabbit knee joint. The electric drill clamps the drill bit 1. The surgeon holds the electric drill with one hand and the holding part 31 of the depth control guide plate 3 with the other hand, so that the transverse groove of the guide plate part 32 is placed above the circular hole in the drilling area 21 and is parallel to the axis of the rabbit femur. The guide plate part 32 has the same arc as the drilling area 21, and the guide plate part 32 can slide on the drilling area 21. When drilling, first drill to the required depth at the center of the circular hole. The stepped limit device 11 on the drill bit 1 prevents the drill bit 1 from continuing to penetrate downward. Keep the position of the depth control guide plate 3 unchanged, and expand the defect area along the direction of the femur axis to the edge of the circular hole of the drilling guide plate 2. Then keep the depth control guide plate 3 closely attached to the drilling guide plate 2, and move the depth control guide plate 3 along the direction perpendicular to the femur axis to expand the defect area to the edge of the circular hole of the drilling guide plate 2. Since the arc of the circular hole on the drilling guide plate 2 is the same as the arc of the trochlea, the arc generated by the movement of the depth control guide plate 3 is also the same as the arc of the trochlea, and the defect modeling on the arc surface can be achieved.

[0043] The osteochondral defect surgical treatment auxiliary device of this application can use tools of different models according to the needs of patients, accurately control the size and depth of the defect, reduce the errors caused by manual operation, and can effectively reduce the risk of graft shedding.

[0044] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application 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 to this application.

[0045] The specific embodiments of the present utility model have been described above. It should be understood that the present utility model is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present utility model. Without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. An auxiliary device for surgical treatment of osteochondral defects, characterized in that, Including: A drill bit (1), a drilling guide plate (2), and a depth control guide plate (3). The drilling guide plate (2) includes a middle drilling area (21) and two side fixing parts (22). The drilling area (21) is curved and has a round hole in the center. The depth control guide plate (3) includes a holding part (31) and a guide plate part (32). The guide plate part (32) is curved and has the same radian as the drilling area (21). The guide plate part (32) is provided with a transverse groove, and the width of the transverse groove is smaller than the diameter of the round hole in the drilling area (21). The guide plate part (32) is arranged above the drilling area (21). The drill bit (1) extends from above through the transverse groove and the round hole to the repair area in sequence.

2. The osteochondral defect surgical treatment assistance device according to claim 1, characterized in that The radian of the drilling area (21) is the same as the radian of the area to be operated on.

3. The osteochondral defect surgical treatment assistance device according to claim 1, characterized in that, The guide plate part (32) is arranged in a fitting manner with the drilling area (21), and the guide plate part (32) is perpendicular to the drilling guide plate (2).

4. The osteochondral defect surgical treatment assistance device according to claim 1, wherein, The length of the transverse groove of the guide plate part (32) is greater than the diameter of the round hole in the drilling area (21).

5. The osteochondral defect surgical treatment assistance device according to claim 1, characterized in that, The end of the drill head of the drill bit (1) is a cutting plane.

6. The osteochondral defect surgical treatment assistance device according to claim 1, wherein, A stepped limiting device (11) is arranged on the drill bit (1). The stepped limiting device (11) includes a first step (111) and a second step (112). The diameter of the first step (111) is smaller than the width of the transverse groove to prevent the drill bit from cutting the guide plate. The diameter of the second step (112) is greater than the width of the transverse groove to control the drilling depth.

7. The osteochondral defect surgical treatment assistance device according to claim 6, characterized in that, A sleeve (12) is sleeved outside the stepped limiting device (11). Screws (121) are arranged on both sides of the sleeve (12). The stepped limiting device (11) is fixedly installed on the drill bit (1) through the cooperation of the sleeve (12) and the screws (121).

8. The osteochondral defect surgical treatment assistance device according to claim 1, wherein, Both the drilling guide plate (2) and the depth control guide plate (3) are metal plates.

9. The osteochondral defect surgical treatment assistance device according to claim 6, characterized in that, The stepped limiting device (11) is a metal cylinder.

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