A femoral condyle locking plate

Abstract

The utility model discloses a femoral condyle locking plate, which comprises a head part and a tail part. The head part is in the shape of C matching the shape of the outer edge of the lateral femoral condyle or the medial femoral condyle. The tail part is in the shape of a strip and is connected to the head part. The tail part is fixed to the side surface of the femoral shaft near the lateral femoral condyle or the medial femoral condyle. The lower surface of the tail part in contact with the femoral shaft is provided with a plurality of limiting grooves. The utility model provides anatomical bone plate at the fracture site of the medial femoral condyle or the lateral femoral condyle to provide coronal and sagittal stability, resist the shear force between the medial condyle and the lateral condyle of the femur and the tibial plateau during the flexion position of the knee joint, and effectively fix the femoral condyle fracture. The lower surface of the tail part in contact with the femoral shaft is provided with a plurality of limiting grooves, which can reduce the contact between the tail part and the muscle, reduce the influence on the blood supply in the periosteum and bone marrow cavity, and better protect the blood supply and promote biological healing.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a femoral condyle locking plate. Background Technology

[0002] As is well known, an intra-articular fracture of the femoral condyle (unilateral or bilateral) in the coronal plane is called a Hoffa fracture. The injury mechanism of Hoffa fracture is mostly due to axial stress concentration in the posterior half of the femoral condyle when the knee is flexed, which is mostly a high-energy injury.

[0003] In the early stages, cannulated screws were mainly used to fix Hoffa fractures. However, simple screw fixation is insufficient to stabilize displaced fractures and cannot withstand the shear force of the proximal tibia on the posterior femoral condyle, as well as the lateral stress during varus and valgus movements of the knee. Fracture displacement or nonunion often occurs during early functional training. Because Hoffa fractures involve large fragments and the gastrocnemius muscle attaches to them, anatomical plates can be placed at the medial epicondyle or lateral epicondyle of the Hoffa fracture to avoid excessive stripping of soft tissue at the attachment points of the gastrocnemius and plantar muscles on the posterior condyle, which could affect the blood supply to the fracture fragments. Utility Model Content

[0004] The purpose of this application is to provide a femoral condyle locking plate to at least partially solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A femoral condyle locking plate, comprising:

[0007] The head is C-shaped, matching the outer edge of the lateral or medial epicondyle of the femur;

[0008] The tail is strip-shaped and connected to the head. The tail is fixed to the side of the femoral shaft near the lateral epicondyle or medial epicondyle of the femur. The lower surface of the tail that contacts the femoral shaft is provided with multiple limiting grooves.

[0009] The femoral condyle locking plate of this utility model is designed with a C-shaped head that matches the outer edge shape of the lateral or medial femoral condyle, allowing the head to closely conform to the anatomical shape of the femoral condyle. The tail is designed as a strip that conforms to the side of the femoral shaft near the lateral or medial femoral condyle, resulting in a closer fit to the femoral condyle and less interference with surrounding tissues. It also provides coronal and sagittal stability to resist the shearing forces between the medial and lateral femoral condyles and the tibial plateau during knee flexion, thus effectively fixing femoral condyle fractures.

[0010] By providing multiple limiting grooves on the lower surface of the tail that contacts the femoral shaft, the contact between the tail and muscles can be reduced, the impact on blood supply to the periosteum and medullary cavity can be reduced, and the pressure on the subcortical bone under the bone plate can be reduced, thereby better protecting blood supply and promoting biological healing.

[0011] In some embodiments, the limiting groove is an arc-shaped groove.

[0012] In some embodiments, the limiting groove is disposed on both sides of the lower surface of the tail in the width direction.

[0013] In some embodiments, the head is provided with a plurality of first locking pressure holes, which are spaced apart along the extension direction of the head.

[0014] In some embodiments, the tail portion is provided with a plurality of second locking pressure holes, which are spaced apart along the extension direction of the tail portion.

[0015] In some embodiments, the number of the first locking pressure holes is 4-6, and at least two of the first locking pressure holes are not parallel to each other axially.

[0016] In some embodiments, the number of the second locking pressure holes is 3-5, and at least two of the second locking pressure holes are not parallel to each other axially.

[0017] In some embodiments, the limiting groove is provided in the middle of adjacent second locking pressure holes.

[0018] In some embodiments, the head has multiple reconstruction grooves extending through the upper and lower surfaces on both sides in the width direction.

[0019] In some embodiments, a connecting portion is further included, which connects the head and the tail.

[0020] In some embodiments, the reconstruction groove is an arc-shaped groove.

[0021] In some embodiments, the connecting portion is provided with a strip-shaped pressure hole.

[0022] In some embodiments, the head, the tail, and the connecting portion are integrally formed.

[0023] In some embodiments, the radius R of the arc of the head is 22mm-28mm.

[0024] In some embodiments, the included angle Deg between the two end faces of the head is 160°-170°.

[0025] In some embodiments, the head is provided with a threaded hole.

[0026] In some embodiments, the tail portion is provided with a Kirschner wire hole at the end away from the head.

[0027] In some embodiments, the femoral condyle locking plate is made of titanium alloy.

[0028] In some embodiments, the thickness T of the femoral condyle locking plate is 1.8 mm to 3 mm. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a three-dimensional structural diagram of the femoral condyle locking plate according to an embodiment of the present invention;

[0031] Figure 2 This is a three-dimensional structural diagram of the femoral condyle locking plate from another angle according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram illustrating the usage state of the femoral condyle locking plate according to an embodiment of the present invention. Figure 1 ;

[0033] Figure 4 This is a schematic diagram illustrating the usage state of the femoral condyle locking plate according to an embodiment of the present invention. Figure 2 ;

[0034] Figure 5 This is a schematic diagram of another femoral condyle locking plate according to an embodiment of the present invention and its usage.

[0035] in:

[0036] 100. Lateral epicondyle of the femur; 200. Medial epicondyle of the femur; 300. Attachment of the popliteal muscle; 400. Attachment of the adductor tubercle; 500. Femoral shaft; 600. Lateral epicondyle plate; 700. Medial epicondyle plate; 800. Screw track;

[0037] 1. Head; 11. First locking pressure hole; 12. Reconstruction groove; 13. Screw hole;

[0038] 2. Tail end; 21. Second locking and pressurizing hole; 22. Limiting groove; 23. Kirschner wire hole;

[0039] 3. Connecting part; 31. Strip-shaped pressure hole. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] The following is for reference. Figures 1-5 This invention describes the femoral condyle locking plate according to an embodiment of the present invention and its usage. When the femoral condyle locking plate is fixed to the lateral epicondyle 100 of the femur, it is called the lateral epicondyle plate 600; when the femoral condyle locking plate is fixed to the medial epicondyle 200 of the femur, it is called the medial epicondyle plate 700.

[0042] The lateral epicondyle plate 600 or medial epicondyle plate 700 of this utility model embodiment both include a head 1 and a tail 2. The head 1 is C-shaped, matching the outer edge shape of the lateral epicondyle 100 or medial epicondyle 200 of the femur. The tail 2 is strip-shaped and connected to the head 1. The tail 2 is fixed to the side of the femoral shaft 500 near the lateral epicondyle 100 or medial epicondyle 200 of the femur. The lower surface of the tail 2 in contact with the femoral shaft 500 is provided with multiple limiting grooves 22.

[0043] The lateral epicondyle plate 600 or medial epicondyle plate 700 of this invention features a C-shaped head 1 that matches the outer edge shape of the lateral epicondyle 100 or medial epicondyle 200 of the femur. This ensures that the head 1 closely conforms to the anatomical shape of the lateral epicondyle 100 or medial epicondyle 200. The tail 2 is positioned as a strip that fits against the side of the femoral shaft 500 near the lateral epicondyle 100 or medial epicondyle 200, minimizing interference with surrounding tissues. It also provides coronal and sagittal stability to resist shear forces between the medial and lateral femoral condyles and the tibial plateau during knee flexion, effectively fixing femoral condyle fractures. This method provides strong fixation and good results, allowing patients to begin functional exercises early, reducing postoperative complications and the incidence of osteonecrosis. By providing multiple limiting grooves 22 on the lower surface of the tail 2 that contacts the femoral shaft 500, the contact between the tail 2 and the muscle can be reduced, the impact on the blood supply to the periosteum and bone marrow cavity can be reduced, and the pressure on the lower cortical bone of the tail 2 can be reduced, thereby better protecting the blood supply and promoting biological healing.

[0044] Optionally, the limiting groove 22 is an arc-shaped groove, such as... Figure 2 As shown. In other embodiments, the limiting groove 22 may be a groove of other shapes.

[0045] Furthermore, the limiting grooves 22 are provided on both sides of the lower surface of the tail 2 in the width direction. This reduces the pressure of the tail 2 on the cortical bone, avoids tissue irritation, and promotes biological healing.

[0046] The femoral condyle locking plate of this embodiment has a plurality of first locking pressure holes 11 on its head 1, which are spaced apart along the extension direction of the head 1. Thus, screws pass through the first locking pressure holes 11 to fix the head 1 to the outer edge of the lateral epicondyle 100 or the medial epicondyle 200 of the femur.

[0047] In this embodiment, as Figure 2 As shown, the first locking and pressure hole 11 is an "8"-shaped hole, including a pressure hole without threads and a locking hole with threads, so that the head 1 has both locking and pressure functions. The operator can choose to use the locking hole or the pressure hole according to the actual situation. When the locking screw is used in conjunction with the locking hole, the head 1 can be fixed on the femoral condyle. When the pressure screw is used in conjunction with the pressure hole, the two ends of the fracture line are pressed closer to each other by the micro-movement between the pressure screw and the pressure hole, making the fracture easier to heal.

[0048] Preferably, the number of first locking pressure holes 11 is 4-6, and at least two of the first locking pressure holes 11 are not parallel in axis direction, such as... Figure 4 As shown in the figure, screw channel 800 is the channel for the screw to be implanted. This ensures that the screw, located in the first locking pressure hole 11, is in a cross-locked state after implantation, resulting in better fixation. Furthermore, the axial direction of the first locking pressure hole 11 avoids the articular surface, reducing the impact of the implanted bone plate on the articular surface.

[0049] Specifically, such as Figure 3 As shown, the convex part of the lateral epicondyle 100° is the attachment point of the popliteal muscle 300°, and the convex part of the medial epicondyle 200° is the attachment point of the adductor tubercle 400° (including the adductor magnus and gastrocnemius muscles). During use, the lateral epicondyle plate 600° is anatomically attached to the outer edge of the lateral epicondyle 100° of the femur, avoiding muscles such as the popliteal muscle, to reduce muscle tissue stripping, enhance blood supply, and promote fracture healing; the medial epicondyle plate 700° is anatomically attached to the outer edge of the medial epicondyle 200° of the femur, avoiding the adductor tubercle and the gastrocnemius muscle, to reduce muscle tissue stripping, enhance blood supply, and promote fracture healing.

[0050] The femoral condyle locking plate of this utility model embodiment, such as Figure 2 As shown, the tail section 2 is provided with a plurality of second locking pressure holes 21, which are arranged at intervals along the extension direction of the tail section 2.

[0051] Specifically, the structure and function of the second locking pressure hole 21 are the same as those of the first locking pressure hole 11, and will not be described again here.

[0052] Preferably, the number of second locking pressure holes 21 is 3-5, and at least two of the second locking pressure holes 21 are not parallel to each other axially. This allows the screws inserted into the second locking pressure holes 21 to form a cross-lock at the fracture site, improving the fixation effect.

[0053] Preferably, a limiting groove 22 is provided in the middle of each adjacent second locking pressure hole 21. This avoids the second locking pressure hole 21, reducing stress concentration at the edge of the second locking pressure hole 21, making the tail 2 bear force evenly, and reducing the risk of bone plate fracture.

[0054] like Figures 1-2 As shown, in this embodiment of the invention, the head 1 has multiple reconstruction grooves 12 extending through the upper and lower surfaces on both sides in the width direction. Therefore, the design of the reconstruction grooves 12 reduces the width of the bone plate between adjacent first locking pressure holes 11, facilitating adjustments to the head 1, such as bending or cutting.

[0055] Preferably, the reconstruction groove 12 is an arc-shaped groove. In other embodiments, the reconstruction groove 12 may be a semi-circular structure or a V-shaped groove structure, so as to facilitate bending or cutting of the head 1.

[0056] like Figures 1-2 As shown, this embodiment of the utility model also includes a connecting part 3, which connects the head 1 and the tail 2.

[0057] Preferably, the head 1, tail 2, and connecting part 3 are integrally formed. This enhances the overall strength of the femoral condyle locking plate.

[0058] Optionally, the connecting part 3 is provided with a strip-shaped pressure hole 31. Thus, by adjusting the position of the pressure screw in the strip-shaped pressure hole 31, a suitable position can be selected for pressure fixing.

[0059] Based on the anatomical shape of the femoral condyle, such as Figure 1 As shown, in this embodiment of the invention, the radius R of the arc of the head 1 is 22mm-28mm, and the included angle Deg between the two end faces of the head 1 is 160°-170°. Therefore, the lateral epicondyle plate 600 or the medial epicondyle plate 700 fits more closely to the lateral epicondyle 100 or the medial epicondyle 200 of the femur, minimizing interference with surrounding tissues.

[0060] Optionally, the radius R of the arc of the head 1 is 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, or 28mm.

[0061] Optionally, the included angle Deg between the two end faces of head 1 is 160°, 165°, or 170°.

[0062] Optionally, such as Figure 5As shown, the head 1 is provided with a standard screw hole 13 to lock the screw to the femoral condyle. In other embodiments, the standard screw hole 13 may not be provided, and only the first locking pressure hole 11 may be provided.

[0063] Optionally, the tail 2 is provided with a Kirschner wire hole 23 at the end away from the head 1, and a Kirschner wire is inserted into the Kirschner wire hole 23 to temporarily fix the femoral condyle locking plate.

[0064] Preferably, the femoral condyle locking plate is made of titanium alloy.

[0065] Preferably, the thickness T of the femoral condyle locking plate is 1.8mm-3mm. This ensures the strength of the femoral condyle locking plate while avoiding the drawbacks of the plate being too thick to be easily bent or too thin to be easily broken.

[0066] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0069] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0070] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A femoral condyle locking plate, characterized in that, include: The head is C-shaped, matching the outer edge of the lateral or medial epicondyle of the femur; The tail is strip-shaped and connected to the head. The tail is fixed to the side of the femoral shaft near the lateral epicondyle or medial epicondyle of the femur. The lower surface of the tail that contacts the femoral shaft is provided with multiple limiting grooves.

2. The femoral condyle locking plate according to claim 1, characterized in that, The limiting groove is an arc-shaped groove; And / or, the limiting groove is provided on both sides of the lower surface of the tail in the width direction.

3. The femoral condyle locking plate according to claim 1, characterized in that, The head is provided with a plurality of first locking pressure holes, which are arranged at intervals along the extension direction of the head; And / or, the tail portion is provided with a plurality of second locking pressure holes, which are arranged at intervals along the extension direction of the tail portion.

4. The femoral condyle locking plate according to claim 3, characterized in that, The number of the first locking pressure holes is 4-6, and at least two of the first locking pressure holes are not parallel to each other axially; And / or, the number of the second locking pressure holes is 3-5, and at least two of the second locking pressure holes are not parallel to each other axially; And / or, the limiting groove is provided in the middle of each adjacent second locking pressure hole.

5. The femoral condyle locking plate according to claim 1, characterized in that, The head has multiple reconstruction grooves that penetrate the upper and lower surfaces on both sides in the width direction. And / or, it also includes a connecting portion that connects the head and the tail.

6. The femoral condyle locking plate according to claim 5, characterized in that, The reconstruction groove is an arc-shaped groove.

7. The femoral condyle locking plate according to claim 5, characterized in that, The connecting part is provided with a strip-shaped pressure hole; And / or, the head, the tail and the connecting part are integrally formed.

8. The femoral condyle locking plate according to claim 1, characterized in that, The radius R of the arc of the head is 22mm-28mm; And / or, the included angle Deg between the two end faces of the head is 160°-170°.

9. The femoral condyle locking plate according to claim 1, characterized in that, The head is provided with a threaded hole; And / or, the tail portion is provided with a Kirschner wire hole at the end away from the head.

10. The femoral condyle locking plate according to claim 1, characterized in that, The femoral condyle locking plate is made of titanium alloy; And / or, the thickness T of the femoral condyle locking plate is 1.8mm-3mm.

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