Internal fixation device for treating pelvic and acetabular fractures

Abstract

The utility model provides an internal fixing device for treating pelvic and acetabular fractures, which comprises an iliopedics plate and an iliopedics plate, and the included angle between the plane where the iliopedics plate is located and the plane where the iliopedics plate is located is an acute angle; the device further comprises a posterior column screw and an acetabulum lower screw, a first kidney-shaped hole matched with the posterior column screw and a second kidney-shaped hole matched with the acetabulum lower screw are formed in the iliopectaculum plate, and the iliopectaculum plate is connected with the position, close to the first kidney-shaped hole, of the iliopectaculum plate. A plurality of first fixing holes are formed in the iliopectinea plate, a plurality of second fixing holes are formed in the iliopectinea plate, a plurality of blocking screws are arranged between the iliopectinea plate and the iliopectinea plate, the blocking screws, the iliopectinea plate and the iliopectinea plate define a triangle, the iliopectinea plate and the iliopectinea plate are fused into a whole through the internal fixing device, and meanwhile the blocking screws are arranged in the internal fixing device. According to the design, the quadrilateral body can be fixed and reset, and the front column, the rear column and the quadrilateral body can be stably fixed through a single front approach.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an internal fixation device for treating pelvic acetabulum fractures. Background Art

[0002] Currently, the use of a single anterior approach to treat acetabular fractures involving both columns has become a trend. Traditional internal fixation involves placing a separate plate between the ilium and pubis, and between the ilium and ischium for fixation. This fixation method, especially for some patients with quadrilateral involvement and elderly osteoporosis, often results in loss of reduction and unstable fixation during and after surgery. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the present invention aims to provide an internal fixation device and screw assembly for treating pelvic acetabular fractures, particularly for patients with osteoporosis. This internal fixation device integrates the iliopectineal plate and ilioccipital plate into a single unit and incorporates a blocking screw within the internal fixation device. This design not only allows for the fixation and reduction of the quadrilateral, but also provides stable fixation of the anterior and posterior columns and the quadrilateral through a single anterior approach.

[0004] To achieve the above-mentioned purpose and other related purposes, the present invention provides, on the one hand, an internal fixation device for treating pelvic acetabular fractures, including an iliopectine plate and an iliosacral plate, the angle between the plane where the iliopectine plate is located and the plane where the iliosacral plate is located is an acute angle; it also includes a posterior column screw and a subacetabular screw, the iliopectine plate is provided with a first waist-shaped hole matching the posterior column screw and a second waist-shaped hole matching the subacetabular screw, the iliosacral plate is connected to the iliopectine plate near the first waist-shaped hole; the iliopectine plate is provided with a plurality of first retention holes, the iliosacral plate is provided with a plurality of second retention holes, a plurality of blocking screws are provided between the iliopectine plate and the iliosacral plate, and each of the blocking screws is respectively enclosed with the iliopectine plate and the iliosacral plate to form a triangle.

[0005] In some embodiments of the present invention, the iliopectine plate includes a side wing, which is between the first waist-shaped hole and the second waist-shaped hole and close to the second waist-shaped hole. The side wing is provided with a locking hole that cooperates with the head end of each blocking screw.

[0006] In some embodiments of the present invention, the iliac seat plate is provided with corresponding receiving grooves for receiving the tail ends of the blocking screws.

[0007] In some embodiments of the present invention, the number of the blocking screws is 2 to 3.

[0008] In some embodiments of the present invention, the width of the side wings is 5 mm-10 mm.

[0009] In some embodiments of the present invention, the size of the first waist-shaped hole is larger than the posterior column screw, and the size of the second waist-shaped hole is larger than the subacetabular screw.

[0010] In some embodiments of the present invention, a plurality of first fixing screws are further included, and the first fixing screws are provided in the first retaining holes.

[0011] In some embodiments of the present invention, a plurality of second fixing screws are further included, and the second fixing screws are disposed in the second retaining holes.

[0012] In some embodiments of the present invention, the angle between the plane where the iliopectine plate is located and the plane where the ilioccipital plate is located is an acute angle of 45° to 80°.

[0013] In some embodiments of the present invention, the number of the first retaining holes is 6 to 8.

[0014] In some embodiments of the present invention, the number of the second retaining holes is 2 to 4.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The internal fixation device for treating pelvic acetabular fractures of the utility model effectively plays a fixing role by fusing the iliopectineal plate and the iliosacral plate into one body. At the same time, a blocking device (blocking screw) is provided on the quadrilateral to reinforce the quadrilateral and prevent it from collapsing. For patients who have already suffered fractures, the device can not only play a fixing and reinforcing role, but also can perform a certain reduction of the quadrilateral. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a schematic three-dimensional structure diagram of the internal fixation device of the present invention from a first angle.

[0018] Figure 2 Shown is a schematic diagram of the three-dimensional structure of the internal fixation device of the present invention from a second angle.

[0019] Figure 3 Shown is a schematic diagram of the three-dimensional structure of the internal fixation device of the present invention from a third angle.

[0020] Figure 4 Shown is a schematic diagram of the partial structure of the internal fixation device of the present invention.

[0021] Figure 5 The figure shows a three-dimensional structure diagram of the fixing device of the present invention in use at one angle.

[0022] Figure 6 The figure shows a perspective structural diagram of the fixing device of the present invention in use at one angle.

[0023] Figure 7 The diagram shows the three-dimensional structure of the fixing device of the present invention in use from another angle.

[0024] Figure 8 The diagram shows a perspective structure of the fixing device of the present invention in use from another angle.

[0025] Figure 9 Shown is a schematic structural diagram of a patient's pelvis at one angle according to the present invention.

[0026] Figure 10 Shown is a structural schematic diagram of the patient's pelvis at another angle according to the present invention.

[0027] Component number description:

[0028] 1 Iliopubic plate

[0029] 11. First waist hole

[0030] 12 Second waist hole

[0031] 13 First retention hole

[0032] 2 Iliac seat board

[0033] 21 Second retention hole

[0034] 22 receiving slots

[0035] 3 posterior column screws

[0036] 4 Subacetabular screws

[0037] 5 Blocking screw

[0038] 6 Flanker

[0039] 61 Locking hole

[0040] 7 First fixing screw

[0041] 8 Pelvis

[0042] 81 arcuate line

[0043] 82 Quadrilateral

[0044] 83 ischium

[0045] 84 pubic bone

[0046] 85 acetabulum DETAILED DESCRIPTION

[0047] The following is a further detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, and are not intended to limit the present invention.

[0048] Terms such as "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" indicate positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0050] In addition, in the description of the present invention, unless otherwise specified, “a plurality of” means two or more.

[0051] In addition, in the description of the present invention, unless otherwise specified, “a plurality of” means two or more.

[0052] like Figures 1 to 10 , an embodiment of the utility model provides an internal fixation device for treating pelvic acetabular fractures.

[0053] Combine Figure 1 、 Figure 5 and Figure 9 The internal fixation device includes an iliopectineal plate 1 and an iliosacral plate 2 that are connected. Both the iliopectineal plate 1 and the iliosacral plate 2 are steel plates that are approximately anatomically designed based on the shape of the pelvis 8. The iliopectineal plate 1 is located on the arcuate line 81 and extends toward the pubic bone 84 to form the iliopectineal plate 1; fused with the iliopectineal plate 1, a branch extends from the vicinity of the first lumbar hole 11 toward the lowest point of the ischium 83 to form the iliosacral plate 2. The internal fixation device as a whole forms a Y shape. The angle between the plane where the iliopectineal plate 1 is located and the plane where the iliosacral plate 2 is located is an acute angle. Optionally, the angle between the plane where the iliopectineal plate 1 is located and the plane where the iliosacral plate 2 is located is 45° to 80°. It can further be selected from 45° to 60° or 60° to 80°.

[0054] The internal fixation device for treating pelvic acetabular fracture provided by the present invention is as follows: Figures 1 to 3 The internal fixation device also includes a posterior column screw 3 and a subacetabular screw 4. The iliopectine plate 1 is provided with a first waist-shaped hole 11 that cooperates with the posterior column screw 3 and a second waist-shaped hole 12 that cooperates with the subacetabular screw 4. The first waist-shaped hole 11 is used to implant the posterior column screw 3, and the second waist-shaped hole 12 is used to implant the subacetabular screw 4. The size of the first waist-shaped hole 11 is larger than that of the posterior column screw 3, and the size of the second waist-shaped hole 12 is larger than that of the subacetabular screw 4, which facilitates the appropriate adjustment of the implantation position of the posterior column screw 3 according to different patients. The iliopectine plate 2 is connected to the iliopectine plate 1 near the first waist-shaped hole 11.

[0055] The internal fixation device for treating pelvic acetabular fracture provided by the present invention is as follows: Figures 1 to 4 The iliopectine plate 1 is provided with a plurality of first retaining holes 13 for fixing the iliopectine plate 1. Optionally, the number of the first retaining holes 13 is 6 to 8, preferably 7, which can facilitate flexible fixation of different patients during surgery.

[0056] The internal fixation device for treating pelvic acetabular fracture provided by the present invention is as follows: Figures 1 to 3 , and also includes a plurality of first fixing screws 7, wherein the first fixing screws 7 are provided in the first retaining holes 13, and the iliopectine plate 1 is fixed by passing the first fixing screws 7 through the first retaining holes 13.

[0057] The internal fixation device for treating pelvic acetabular fracture provided by the present invention is as follows: Figures 1 to 4 The iliac seat plate 2 is provided with a plurality of second retention holes 21. Optionally, the number of the second retention holes 21 is 2 to 4, preferably 3. The iliac seat plate 2 is located on the inner side of the pelvis 8, approximately extending to the ischial spine 83. Inserting screws during surgery is difficult, so only the second retention holes 21 are provided for selective fixation.

[0058] The internal fixation device for treating pelvic acetabular fractures provided by the present invention further includes a plurality of second fixing screws, which are provided in the second retaining holes 21 , and the iliac seat plate 2 is fixed by the second fixing screws passing through the second retaining holes 21 .

[0059] The internal fixation device for treating pelvic acetabular fracture provided by the present invention is as follows: Figure 1 、 3 A plurality of blocking screws 5 are provided between the iliopectine plate 1 and the iliocelli 2. Each blocking screw 5 is respectively enclosed with the iliopectine plate 1 and the iliocelli 2 to form a triangle, making the iliopectine plate 1 and the iliocelli 2 more stable.

[0060] In one embodiment, if Figure 1, the iliopectine plate 1 includes a side wing 6, and the side wing 6 is between the first waist-shaped hole 11 and the second waist-shaped hole 12, and is close to the second waist-shaped hole 12. Specifically, the iliopectine plate 1 branch is slightly extended about 5mm-10mm (that is, the width of the side wing 6) toward the inside of the pelvis 8 to form the side wing 6. For example, the side wing 6 is located in the lower half of the iliopectine plate 1. The side wing 6 is provided with a locking hole 61 that matches the head end of each blocking screw 5. There are multiple locking holes 61. For example, 2-3 holes for implanting blocking screws 5 are provided on the side wing 6, which are locking holes 61, and the direction points to the groove on the side of the iliopectine plate 2 for implanting blocking screws 5. As Figure 4 The iliopectine plate 2 is provided with corresponding receiving grooves 22 for receiving the tail ends of the blocking screws 5. The blocking screws 5 are connected to the iliopectine plate 1 and the iliopectine plate 2 through the locking holes 61 and the receiving grooves 22, thereby forming a triangular structure.

[0061] The present invention inserts blocking screws 5 through the multiple locking holes 61 on the side wings 6. During use, the blocking screws 5 are located at the quadrilateral 82, pointing toward the grooves on the sides of the iliac seat 2. After the blocking screws 5 are inserted, a fence-like structure is formed, thereby reinforcing the quadrilateral 82. The present application does not design the quadrilateral 82 as a fully enclosed steel plate, but instead uses blocking screws 5 to secure the quadrilateral 82. Although the fully enclosed steel plate design of the quadrilateral 82 may theoretically provide a better blocking effect, it presents many practical problems.

[0062] First, its large size makes it difficult to place during surgery;

[0063] Second: The connection area of ​​the steel plates is large, which is not conducive to plasticity;

[0064] Third, the surgical field is filled with important blood vessels, nerves, and internal organs, and placement is done stealthily within the operating window. A large plate would be difficult to operate and implant, adding complexity to the surgery.

[0065] Fourth: Placing a larger plate may make the surgical opening larger;

[0066] Fifth: Because the quadrilateral 82 bone surface is not flat and regular, even if the fully enclosed steel plate is made into an anatomical shape, it is difficult to achieve close "surface-to-surface contact" between the steel plate and the bone surface. Instead, it is "point-to-surface contact", which leads to the difference between the actual blocking effect and the ideal effect.

[0067] Sixth: The full-cover steel plate can generally only be used after the posterior column and quadrilateral 82 are reduced, and its auxiliary reduction effect is poor.

[0068] Therefore, based on the above, the present application has made an iliopectineal fusion steel plate combined with a blocking screw 5 to achieve blocking fixation of the quadrilateral 82. In this way, the designed steel plate has a small area, is flexible in application, and is easy to plasticize. The blocking screw 5 is more likely to fit the quadrilateral 82 to achieve line-surface contact, and there is no obvious space occupying effect. The blocking effect is better, and the screw also has an auxiliary reduction effect during the insertion process.

[0069] Optionally, the number of blocking screws 5 is 2-3, which is generally sufficient to achieve a fixation effect. If there are too many screws, the double-row holes of the iliopectine plate 1 will be longer, and the ilioccipital plate 2 will also need to be designed longer. Since there are important tissues on the inner side, too many screws will make the operation more difficult and increase the risk, while at the same time, it will not affect the overall structure of the steel plate.

[0070] The use process of this utility model:

[0071] like Figures 5-10 When using the device, the iliopectineal plate 2 is plastically pre-bent. After the fracture fragment is reduced, the iliopectineal plate 1 is first extended along the arcuate line 81 toward the pubic bone 84 to fit the bone surface. The iliopectineal plate 2 is then aligned toward the lowest point of the ischium 83 to fit the bone surface. First fixation screws 7 are then driven into the upper and lower first retention holes 13 of the iliopectineal plate 1. After initial fixation, blocking screws 5 are respectively inserted through the locking holes 61 on the lateral wings 6. The tail ends of the blocking screws 5 are placed in the receiving grooves 22 of the iliopectineal plate 2, thereby further forming a triangular stable structure of the iliopectineal plate 1 and iliopectineal plate 2 for reduction and reinforcement. The posterior column screws 3 and the subacetabular screws 4 are then driven. Finally, first fixation screws 7 are driven into the remaining first retention holes 13 and second fixation screws are driven into the second retention hole 21 as needed.

[0072] In summary, the internal fixation device for treating pelvic acetabular fractures of the present invention effectively plays a fixing role by fusing the iliopectineal plate 1 and the iliosacral plate 2 into one. At the same time, a blocking device (blocking screw 5) is provided on the quadrilateral 82 to reinforce the quadrilateral 82 and prevent it from collapsing. For patients who have already suffered fractures, the device can not only play a role of fixing and reinforcing, but also can perform a certain reduction on the quadrilateral 82.

[0073] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0074] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. An internal fixation device for treating pelvic acetabular fractures, characterized in that: The invention comprises an iliopectine plate (1) and an iliopectine seat plate (2), wherein the angle between the plane where the iliopectine plate (1) is located and the plane where the iliopectine seat plate (2) is located is an acute angle; the invention also comprises a posterior column screw (3) and a subacetabular screw (4), wherein the iliopectine plate (1) is provided with a first waist-shaped hole (11) matched with the posterior column screw (3) and a second waist-shaped hole (12) matched with the subacetabular screw (4), and the iliopectine seat plate (2) is connected to the iliopectine plate (1) near the first waist-shaped hole (11); the iliopectine plate (1) is provided with a plurality of first retaining holes (13), and the iliopectine seat plate (2) is provided with a plurality of second retaining holes (21), and a plurality of blocking screws (5) are provided between the iliopectine plate (1) and the iliopectine seat plate (2), and each blocking screw (5) is respectively enclosed with the iliopectine plate (1) and the iliopectine seat plate (2) to form a triangle.

2. The internal fixation device for treating pelvic acetabular fractures according to claim 1, wherein: The iliopectine plate (1) includes a side wing (6), which is between the first waist-shaped hole (11) and the second waist-shaped hole (12) and close to the second waist-shaped hole (12). The side wing (6) is provided with a locking hole (61) that matches the head end of each blocking screw (5).

3. The internal fixation device for treating pelvic acetabular fractures according to claim 2, wherein: The iliac seat plate (2) is provided with corresponding receiving grooves (22) for receiving the tail ends of the blocking screws (5).

4. The internal fixation device for treating pelvic acetabular fractures according to claim 1, wherein: The number of the blocking screws (5) is 2 to 3.

5. The internal fixation device for treating pelvic acetabular fractures according to claim 2, wherein: The width of the side wings (6) is 5mm-10mm.

6. The internal fixation device for treating pelvic acetabular fractures according to claim 1, wherein: The size of the first waist-shaped hole (11) is larger than the posterior column screw (3), and the size of the second waist-shaped hole (12) is larger than the subacetabular screw (4).

7. The internal fixation device for treating pelvic acetabular fractures according to claim 1, wherein: It also includes a plurality of first fixing screws (7), wherein the first fixing screws (7) are provided in the first retaining holes (13).

8. The internal fixation device for treating pelvic acetabular fractures according to claim 1, wherein: It also includes a plurality of second fixing screws, wherein the second fixing screws are arranged in the second retaining holes (21).

9. The internal fixation device for treating pelvic acetabular fractures according to claim 1, wherein: The angle between the plane where the iliopectine plate (1) is located and the plane where the ilioccipital plate (2) is located is an acute angle of 45° to 80°.

10. The internal fixation device for treating pelvic acetabular fractures according to claim 1, characterized in that: The number of the first retaining holes (13) is 6 to 8; and / or the number of the second retaining holes (21) is 2 to 4.

Images