CN215994211U

CN215994211U - Tibia posterolateral dissection locking system

Info

Publication number: CN215994211U
Application number: CN202121610740.9U
Authority: CN
Inventors: 祝少博; 赵勇; 王建; 左舒
Original assignee: Tianjin Zhengtian Medical Instrument Co Ltd; Beijing Naton Medical Technology Holdings Co Ltd
Current assignee: Tianjin Zhengtian Medical Instrument Co Ltd; Beijing Naton Medical Technology Holdings Co Ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2022-03-11
Anticipated expiration: 2031-07-15

Abstract

The utility model provides a tibia posterolateral anatomy locking system, which comprises a first locking plate and a second locking plate, wherein the first locking plate and the second locking plate are sequentially connected from a near end to a far end; the first locking plate is in a long strip shape, the second locking plate is an arc-shaped plate, two rows of locking holes are formed in the second locking plate from the near end to the far end, the central lines of the locking holes in the row at the near end are horizontally arranged, and the central lines of the locking holes in the row at the far end are obliquely arranged towards the near end. According to the tibia posterolateral anatomy locking system provided by the utility model, the screws on the second locking plate are locked in a crossed manner, the fixation is firmer, the screws at the far end are obliquely arranged, the screws can be prevented from entering the ankle joint cavity by mistake, the individualized internal fixation requirement of the posterior ankle can be met, and the posterior ankle fractures with different long and short fracture lines can be better handled in practical application.

Description

Tibia posterolateral dissection locking system

Technical Field

The utility model belongs to the technical field of medical instruments, and particularly relates to a tibial posterolateral anatomy locking system.

Background

Ankle joint fracture is one of the common clinical fracture types, is intraarticular fracture, is most likely to occur in young and strong years, is mostly caused by rotary violence or indirect violence, accounts for 4 percent of the total fracture, and accounts for 7 to 44 percent of the affected hind ankles. The improper treatment of the fracture of the ankle is easy to cause instability of the ankle and the occurrence of late traumatic arthritis. At present, the treatment of the fracture of the ankle is followed by anatomical reduction and strong fixation, and open anatomical reduction is the main method for treating the fracture of the ankle. In clinical work, the existing anatomical locking steel plate applied to the posterior malleolus part in China is lack, and in addition, the selectable several posterior malleolus steel plates also have some defects: the sliding holes are lacked, so that the position of the steel plate is difficult to adjust up and down in the application process of the steel plate; the angle of the far-end row nails is not good enough; the diameter of the far-end chain riveting is too large; the width of the far end of the steel plate is not suitable; a remote chain riveting non-angle fixing technology; the near end of the steel plate has no or few combining holes, so the use is inconvenient.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a tibia posterolateral anatomy locking system, screws on a second locking plate are locked in a crossed mode, the fixation is firmer, and the screws at the far end are arranged in an inclined mode, so that the screws can be prevented from entering an ankle joint cavity by mistake.

In order to achieve the purpose, the utility model provides the following technical scheme:

a tibia posterolateral anatomy locking system comprises a first locking plate and a second locking plate which are sequentially connected from a proximal end to a distal end, wherein the width of the second locking plate is larger than that of the first locking plate; the first locking plate is in a long strip shape, the second locking plate is an arc-shaped plate, two rows of locking holes are formed in the second locking plate from the near end to the far end, the central lines of the locking holes in the row at the near end are horizontally arranged, and the central lines of the locking holes in the row at the far end are obliquely arranged towards the near end.

Further, the center line of the locking holes in the distal row is inclined toward the proximal end by 10 to 25 degrees with respect to the horizontal line.

Further, the width of the distal end of the second locking plate is 31mm-33 mm.

Further, two rows of locking holes arranged on the second locking plate are matched with screws with the diameter of 2.7 mm.

Furthermore, a locking hole, a plurality of composite locking holes and a sliding hole are sequentially arranged on the first locking plate from the near end to the far end.

Furthermore, the number of the composite locking holes is at least two.

Further, the sliding hole is oblong.

Further, the diameter of the screw engaged with the first locking plate is larger than the diameter of the screw engaged with the second locking plate.

Further, the diameter of the screw that the first locking plate cooperates with is 3.5 mm.

Further, a Kirschner wire hole is formed in the distal end of the second locking plate.

Compared with the prior art, the utility model has the beneficial effects that:

the tibia posterolateral anatomy locking system provided by the utility model can meet the personalized requirement of posterior ankle internal fixation; the screws on the second locking plate are locked in a crossed manner, so that the fixing effect of the fracture is improved; the 2.7mm screws with which the second locking plate is fitted reduce the risk of fracture of the bone flap; the row of matched screws at the far end of the second locking plate are distributed at an angle of 10-25 degrees, so that the risk of the screws entering the joint cavity by mistake can be effectively reduced; the sliding hole and the composite locking hole are designed to facilitate the operation; the width of the steel plate designed based on actual anatomical data is exactly fixed, and meanwhile, the peeling of soft tissues is reduced; the length of the locking plate can be selected, so that the locking plate can better cope with the rear ankle fractures with different long and short fracture lines in practical application.

Drawings

FIG. 1 is a front view of a posterior lateral tibial anatomical locking system provided in accordance with an embodiment of the present invention;

fig. 2 is a side view of a posterior lateral tibial anatomical locking system provided by an embodiment of the present invention.

Wherein:

1. a first locking plate; 11. a locking hole; 12. a composite locking hole; 13. a slide hole;

2. a second locking plate; 21. a locking hole;

3. a screw; 4. a horizontal line;

alpha, the tilt angle.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present embodiment provides a tibia posterolateral anatomy locking system, as shown in fig. 1 and 2, including a first locking plate 1 and a second locking plate 2 connected in sequence from a proximal end to a distal end, a width of the second locking plate 2 is greater than a width of the first locking plate 1, the first locking plate 1 is in a long strip shape, a locking hole 11, a plurality of composite locking holes 12 and a sliding hole 13 are sequentially arranged on the first locking plate 1 from the proximal end to the distal end, wherein the number of the composite locking holes 12 is at least two. The sliding holes 13 are arranged to facilitate the adjustment of the position of the steel plate, and the nail holes of the first locking plate 1 are distributed in the composite locking holes 12, so that the use is flexible in actual operation. The length of the first locking plate 1 is divided into a short length and the composite locking holes 12 are provided with 3, 5 and 7 holes which are optional, so that the fixing difficulty caused by long fracture lines in practical application is overcome. The locking hole 11 may be a conventional threaded hole or a universal hole, etc.

Specifically, the second locking plate 2 is provided with two rows of locking holes 21 in the proximal-to-distal direction, the center lines of the locking holes 21 in the proximal row are arranged horizontally, and the center lines of the locking holes 21 in the distal row are arranged obliquely to the proximal end. A row of screws 3 are arranged at the near end of the second locking plate 2 in a matched mode, and form an angle with the screws 3 arranged at the far end to be fixed, and the fixation is firmer. The angle fixation of the far-end row of matched screws improves the fixation effect of the fracture.

Optionally, the centerline of the locking holes 21 in the distal row is inclined proximally by an angle α of 10 ° to 25 °, such as 12 °, 13 °, 18 °, 19 °, 22 °, or the like, preferably 15 °, based on the horizontal line 4. The above angle value can be adjusted according to the actual situation. The raft screws are arranged in the row of locking holes 21 at the far end of the second locking plate 2 and are distributed at an angle of 10-25 degrees, so that the risk that the screws mistakenly enter the ankle cavity can be effectively reduced.

Optionally, the distal width of the second locking plate 2 is 31mm-33mm, such as 32 mm. The width of the distal end of the second locking plate 2 is between 31mm and 33mm, and is more consistent with the actual width of the rear ankle. The width of the distal end of the second locking plate 2 can be adjusted according to actual conditions.

Alternatively, the diameter of the screw cooperating with the second locking plate 2 is smaller than the diameter of the screw cooperating with the first locking plate 1; preferably, the first locking plate 1 is fitted with screws of 3.5mm diameter and the second locking plate 2 is fitted with screws of 2.7mm diameter. A 2.7mm diameter screw reduces the risk of fracture of the bone flap.

Optionally, the sliding hole 13 is oblong. The slide hole 13 may also be a race track shape, an oval shape, or the like.

Optionally, the distal end of the second locking plate 2 is further provided with a kirschner wire hole for temporary fixation of the second locking plate 2.

The tibia posterolateral anatomy locking system provided by the embodiment can meet the requirement of personalized posterior ankle internal fixation; the sliding hole and the composite locking hole are designed to facilitate the operation; the 2.7mm screws with which the second locking plate 2 is fitted reduce the risk of fracture of the bone flap; the angle fixation of the far end row of the second locking plate 2 matched with the screws improves the fixation effect of the fracture; the row of matched screws at the far end of the second locking plate 2 are distributed in a 15-degree manner, so that the risk that the screws mistakenly enter the ankle cavity can be effectively reduced; the width of the steel plate designed based on actual anatomical data is exactly fixed, and meanwhile, the peeling of soft tissues is reduced; the length of the locking plate can be selected, so that the locking plate can better cope with the rear ankle fractures with different long and short fracture lines in practical application.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the utility model. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. A tibial posterolateral anatomic locking system characterized by: the locking device comprises a first locking plate and a second locking plate which are sequentially connected from a near end to a far end, wherein the width of the second locking plate is larger than that of the first locking plate; the first locking plate is in a long strip shape, the second locking plate is an arc-shaped plate, two rows of locking holes are formed in the second locking plate from the near end to the far end, the central lines of the locking holes in the row at the near end are horizontally arranged, and the central lines of the locking holes in the row at the far end are obliquely arranged towards the near end.

2. The posterolateral tibial anatomical lock system of claim 1, wherein: the center line of the locking holes of the distal row is inclined toward the proximal end by 10 to 25 degrees with respect to the horizontal line.

3. The posterolateral tibial anatomical lock system of claim 1, wherein: the width of the far end of the second locking plate is 31mm-33 mm.

4. The posterolateral tibial anatomical lock system of claim 1, wherein: two rows of locking holes arranged on the second locking plate are matched with screws with the diameter of 2.7 mm.

5. The posterolateral tibial anatomical lock system of claim 1, wherein: the first locking plate is provided with a locking hole, a plurality of composite locking holes and a sliding hole in sequence from the near end to the far end.

6. The posterior lateral tibial anatomical lock system of claim 5, wherein: the number of the composite locking holes is at least two.

7. The posterior lateral tibial anatomical lock system of claim 5, wherein: the sliding hole is oblong.

8. The posterolateral tibial anatomical lock system of claim 1, wherein: the diameter of the screw matched with the first locking plate is larger than that of the screw matched with the second locking plate.

9. The posterolateral tibial anatomical lock system of claim 8, wherein: the diameter of the screw cooperating with the first locking plate is 3.5 mm.

10. The posterolateral tibial anatomical lock system of claim 1, wherein: the distal end of the second locking plate is also provided with a Kirschner wire hole.