A locking plate for the greater trochanter of a femur

Abstract

The large trochanter locking plate for femur comprises a plate body, a trochanter plate and a femur plate connected with the trochanter plate, the trochanter plate is matched with the anatomical surface behind the human femoral trochanter, the femur plate is matched with the anatomical surface behind the femoral shaft, the outer surface of the trochanter plate is provided with a fixing part, the two ends of the fixing part are communicated with threading holes around the axial direction of the femur, the femur plate is provided with at least one row of longitudinally arranged fixing holes, a fixing line is provided, the two ends of the fixing line are respectively threaded in the threading holes and wound on the outer side of the femur, and a line tightener is provided, the two ends of the fixing line are locked in the line tightener after winding around the outer side of the femur for one turn. When applied, the application can reduce the cutting and sinking of the fractured block of the large trochanter of the femur, make the fractured block reset well and stably fixed, and improve the function of the gluteus medius after operation.

Description

Technical Field

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

[0002] Intertrochanteric fractures of the femur commonly occur in the elderly (66-76 years old). The elderly have osteoporosis and less flexibility in their limbs. Sudden twisting of the lower limb, falls, or direct impact of the greater trochanter with the ground can easily cause fractures. Due to the combined stress of varus and anterior angulation on the trochanter, hip varus deformity and impingement with the greater trochanter as the fulcrum can occur, forming a butterfly fracture of the greater trochanter. Avulsion fractures of the greater trochanter can also be caused by sudden contraction of the iliopsoas muscle. The bone in the trochanteric region is brittle, so the fracture is often comminuted.

[0003] Conventional treatment for femoral fractures typically involves internal fixation (internal locking), using multiple locking screws and plates to create pressure and lock the fracture. However, for comminuted intertrochanteric fractures of the femur, internal fixation requires more screws, meaning greater surgical stress for the surgeon. Furthermore, considering the bone quality of patients (especially the elderly), excessive screw holes may affect bone strength. Screw fixation is also prone to loosening and torsion, limiting its effectiveness. Additionally, there is a possibility that the femoral trochanter fragments may be too small or thin to easily create screw holes. Therefore, conventional internal fixation methods can negatively impact bone quality, potentially causing secondary bone damage in severe cases. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a femoral greater trochanter locking plate.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A femoral greater trochanter lock plate, comprising

[0007] The plate includes a rotor plate and a femoral plate connected to the rotor plate. The rotor plate is adapted to the anatomical shape of the posterior aspect of the human femoral rotor, and the femoral plate is adapted to the anatomical shape of the posterior aspect of the femoral shaft. The outer surface of the rotor plate is provided with a fixing part, and the two ends of the fixing part are connected to the axial direction of the femur with threading holes. The femoral plate has at least one row of longitudinally arranged fixing holes.

[0008] The fixing thread, with its two ends respectively threaded through the threading hole and wrapped around the lateral side of the femur; and

[0009] A tensioner is used to secure the fixation thread by wrapping it around the outside of the femur once.

[0010] Furthermore, a bone nail for fixing the femur is inserted into the fixing hole, and the sidewall of the bone nail is covered with a fixing coating with an uneven structure.

[0011] Furthermore, the number of the threading holes is at least one, and the threading hole is an arc-shaped hole in the axial direction surrounding the femur.

[0012] Furthermore, the outer surface of the rotor plate is provided with a limiting groove adapted to the fixing wire on one side of the wire hole.

[0013] Furthermore, the tensioner includes a cylindrical tensioning shell, and at least two locking holes are provided inside the tensioning shell along the direction perpendicular to the tensioner's axis, with the two locking holes being connected.

[0014] Furthermore, the outer peripheral surface of the tensioning shell is provided with a tensioning hole that connects the two locking holes. A fastener is threaded into the tensioning hole, and the fastener passes through the tensioning hole and is connected to the fixing line.

[0015] Furthermore, the plate is made of metal; a transition gradient layer is provided between the rotor plate and the femoral plate.

[0016] The beneficial effects of this utility model are:

[0017] 1. The present invention proposes a femoral greater trochanter locking plate, in which the fixation line relies on the plate body and surrounds the femoral greater trochanter according to the structure of the femur. The fixation line and the plate body use the compression and gathering effect of the femoral trochanter to effectively promote femoral recovery and ensure stable femoral reduction and fixation. At the same time, it greatly reduces the damage to the patient and the pressure on the surgeon during or after the operation.

[0018] 2. The femoral greater trochanter locking plate proposed in this utility model, through the design of the plate body, can reduce the cutting and indentation of the fracture fragments when applying pressure to reduce the fracture fragments, so as to achieve good reduction and stable fixation of the fracture fragments and improve the function of the gluteus medius muscle after surgery.

[0019] 3. The femoral greater trochanter locking plate proposed in this utility model can easily and accurately fix fracture fragments by setting fixation lines and tensioners, reducing soft tissue damage and shortening operation time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the utility model 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 the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1This is one of the application scenarios of the femoral greater trochanter locking plate of this utility model;

[0022] Figure 2 This is the second scenario illustration of the application of the femoral greater trochanter locking plate of this utility model;

[0023] Figure 3 This is one of the schematic diagrams of a femoral greater trochanter locking plate according to the present invention;

[0024] Figure 4 This is the second schematic diagram of a femoral greater trochanter locking plate according to the present invention.

[0025] In the diagram, 10 is the plate; 101 is the femoral plate; 1011 is the fixation hole; 102 is the rotor plate; 1021 is the limiting groove; 103 is the fixation part; 1031 is the suture hole; 20 is the fixation line; 30 is the suture tensioner; and 40 is the bone screw. Detailed Implementation

[0026] The following is combined Figure 1-4 This utility model will be described in detail.

[0027] A femoral greater trochanter lock plate, characterized in that it includes:

[0028] The plate 10 includes a rotor plate 102 and a femoral plate 101 connected to the rotor plate 102. The rotor plate 102 is adapted to the anatomical shape of the posterior aspect of the human femoral rotor, and the femoral plate 101 is adapted to the anatomical shape of the posterior aspect of the femoral shaft. The outer surface of the rotor plate 102 is provided with a fixing part 103. Both ends of the fixing part 103 are connected to thread holes 1031 around the axial direction of the femur. The femoral plate 101 has at least one row of longitudinally arranged fixing holes 1011.

[0029] The fixing thread 20, with its two ends respectively threaded through the two thread holes 1031 and wrapped around the lateral side of the femur; and

[0030] The tensioner 30 is used to secure the fixing line 20 by wrapping it around the outside of the femur once.

[0031] In this embodiment, the number of the threading holes 1031 is at least one, and the threading hole 1031 is an arc-shaped hole in the axial direction around the femur. The fixing part 103 is a steel plate lug, and the threading hole 1031 is arc-shaped at 30° around the femoral axis, with the hole diameter adapted to the fixing wire 20, allowing the fixing wire 20 to pass through in both directions.

[0032] In this embodiment, the outer surface of the rotor plate 102 is provided with a limiting groove 1021 adapted to the fixing line 20 on one side of the wire hole 1031.

[0033] The limiting groove 1021 is located on the outer surface of the rotor plate 102, adjacent to the outlet side of the threading hole 1031, which is the starting point of the path of the fixing wire 20 before it wraps around the femur after it passes through. It extends along the long axis of the femur and forms a continuous guide channel with the arc-shaped path of the threading hole 1031, guiding the fixing wire 20 to smoothly transition to the winding path. The edges on both sides of the groove are designed with rounded corners to avoid sharp edges cutting the wire or damaging the surrounding soft tissue.

[0034] In this embodiment, a bone screw 40 for fixing the femur is inserted into the fixation hole 1011. The sidewall of the bone screw 40 has a fixation coating with an uneven structure. The bone screw 40 is a bioactive locking screw made of TC4 titanium alloy. The thread surface is coated with a nano-scale hydroxyapatite-collagen composite coating by plasma spraying, which is suitable for internal fixation of intertrochanteric fractures of the femur in elderly patients with osteoporosis.

[0035] In this embodiment, the tensioner 30 includes a cylindrical tensioning shell, and at least two locking holes are provided inside the tensioning shell along the direction perpendicular to the device's axial direction, with the two locking holes communicating with each other. Further, the outer peripheral surface of the tensioning shell is provided with a tensioning hole communicating with the two locking holes, and a fastener is threadedly connected to the tensioning hole. The fastener passes through the tensioning hole and is connected to the fixing line 20.

[0036] In this embodiment, the plate 10 is made of metal; a transition gradient layer is provided between the two regions of the rotor plate 102 and the femoral plate 101. Specifically, the plate 10 is made of stainless steel or titanium implant, and its shape is consistent with the anatomical outline of the posterior femur. The fixation suture 20 is equipped with conventional surgical instruments, including but not limited to: fixation suture 20 guide, tightening forceps, and cutting forceps. The fixation suture 20 is 40 cm long and has a diameter of 1.5 mm or 1.7 mm.

[0037] A binding method applicable to a femoral greater trochanter locking plate, wherein the femoral trochanter fracture site is bound and fixed according to the following steps:

[0038] Step S1, reduction of femoral trochanteric fracture: surgical reduction of the trochanteric fracture of the human femur;

[0039] Step S2, preliminary fixation: Select a suitable plate 10 according to the size of the patient's femur, and use the plate 10 as the fixation base. Fit the plate body of the plate 10 to the femoral shaft and fix it with bone screws 40 to form preliminary fixation for the reduction of intertrochanteric fracture of the femur.

[0040] Step S3, greater trochanter ligation: The fixation suture 20 passes through the suture hole 1031, and its two ends cross in a figure-eight shape before passing through the limiting groove 1021 in opposite directions to achieve a figure-eight fixation of the greater trochanter. The fixation suture 20 is then locked to the tensioner 30 to achieve fixation of the greater trochanter. The suture holes 1031 of the fixation suture 20 on the plate 10 are staggered, which greatly facilitates the surgeon to insert the fixation suture 20, reduces surgical time, improves efficiency, and the inner and outer layers coordinate with each other to improve the binding effect.

[0041] Step S4: Adjust and check the fracture surface: Adjust the tightness of the fixation line 20 to ensure that the fracture surface of the greater trochanter of the femur is aligned and fits tightly.

[0042] The preoperative preparation is the same as that for general intertrochanteric fracture surgery of the femur. First, based on the patient's diagnosis and the OA classification guidelines for intertrochanteric fractures of the femur, a suitable surgical approach is selected to reduce the femoral trochanteric fracture. A suitable plate 10 is selected according to the size of the patient's femur. The plate 10 is first attached to the femoral shaft. Then, using the plate 10 as a fixation base, the inner side of the plate 10 is pressed against the greater trochanter by hammering or other compression methods to form a preliminary fixation for the reduction of the femoral fracture. The greater trochanter of the femur is tied: at least one fixation suture 20 is passed through the suture hole and the fixation suture 20 is wrapped around the femoral neck of the greater trochanter of the femur. The tightness of the fixation suture 20 is adjusted to ensure that the fracture surfaces of the femoral trochanter are aligned and tightly fitted. Using this ligation method, the fixation line 20, relying on the plate 10 and the femoral neck around the coarse area according to the structure of the femur, uses the fixation line 20 and the plate 10 to compress and gather the femur, effectively promoting femoral recovery and ensuring stable femoral reduction and fixation. At the same time, it greatly reduces damage to the patient and stress on the surgeon during or after the operation.

[0043] In this embodiment, in step S3, the angle between the force direction applied by the fixing line 20 to the greater trochanter and lesser trochanter of the femur and the direction of the femoral neck axis is 0-90°.

[0044] In this embodiment, a tying method is used to tie up other bone fragments that need to be fixed or the repair bone fragments that need to be used in anatomical greater trochanter fractures of the femur.

[0045] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A femoral greater trochanter locking plate, characterized in that, include The plate includes a rotor plate and a femoral plate connected to the rotor plate. The rotor plate is adapted to the anatomical shape of the posterior aspect of the human femoral rotor, and the femoral plate is adapted to the anatomical shape of the posterior aspect of the femoral shaft. The outer surface of the rotor plate is provided with a fixing part, and the two ends of the fixing part are connected to the axial direction of the femur with threading holes. The femoral plate has at least one row of longitudinally arranged fixing holes. The fixing thread, with its two ends respectively threaded through the threading hole and wrapped around the lateral side of the femur; and A tensioner is used to secure the fixation thread by wrapping it around the outside of the femur once.

2. The femoral greater trochanter locking plate as described in claim 1, characterized in that, A bone nail for fixing the femur is inserted into the fixing hole, and the sidewall of the bone nail is covered with a fixing coating with an uneven structure.

3. The femoral greater trochanter locking plate as described in claim 1, characterized in that, The number of the threading holes is at least one, and the threading hole is an arc-shaped hole in the axial direction around the femur.

4. The femoral greater trochanter locking plate as described in claim 3, characterized in that, The outer surface of the rotor plate is provided with a limiting groove for the fixing wire on one side of the wire hole.

5. The femoral greater trochanter locking plate as described in claim 1, characterized in that, The tensioner includes a cylindrical tensioning shell, and at least two locking holes are provided in the tensioning shell along the axial direction, and the two locking holes are connected to each other.

6. The femoral greater trochanter locking plate as described in claim 5, characterized in that, The outer peripheral surface of the tensioning shell is provided with a tensioning hole that connects two locking holes. A fastener is threaded into the tensioning hole, and the fastener passes through the tensioning hole and is connected to the fixing line.

7. The femoral greater trochanter locking plate as described in claim 1, characterized in that, The plate is made of metal; a transition gradient layer is provided between the rotor plate and the femoral plate.

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