Small-incision minimally invasive steel plate for distal radius

Abstract

The small-incision minimally invasive steel plate comprises an end plate body and a rod plate body which are connected in a T shape, the end plate body is connected to one end of the rod plate body and bent towards the top face of the rod plate body, an insertion tip is formed at the end, away from the end plate body, of the rod plate body, and the insertion tip is connected with the end plate body. A first screw hole, a second screw hole and a third screw hole are sequentially formed in the surface of the rod plate body from the position close to the end plate body to the inserting tip end in the extending direction of the rod plate body and connected to a first screw, a second screw and a third screw correspondingly. The extending direction of the first screw hole is perpendicular to the surface of the rod plate body, the extending direction of the second screw hole and the extending direction of the third screw hole are inclined to the surface of the rod plate body, and the inclination angle of the third screw hole is larger than that of the second screw hole. According to the utility model, the incision only needs 1.5-2 centimeters, and the implantation is more suitable.

Description

Technical Field

[0001] This application relates to orthopedic devices, and more particularly to a minimally invasive plate for use in the distal radius. Background Technology

[0002] The distal radius is the most common fracture site in the human body. Traditionally, this fracture was treated with an open incision followed by fixation with a plate and screws, typically about 8 centimeters long. This relatively long incision resulted in a prolonged healing time. Utility Model Content

[0003] The purpose of this invention is to provide a minimally invasive plate for the distal radius with a small incision, requiring only 1.5 to 2 centimeters of incision, making implantation more suitable.

[0004] To achieve the above objectives, the present invention provides the following technical solution.

[0005] This application discloses a minimally invasive steel plate for small incisions in the distal radius, comprising an end plate and a rod plate connected in a T-shape. The end plate is connected to one end of the rod plate and bends towards the top surface of the rod plate. An insertion tip is formed at the end of the rod plate away from the end plate. A first screw hole, a second screw hole, and a third screw hole are sequentially arranged on the surface of the rod plate along its extension direction from near the end plate to the insertion tip. The first screw hole, the second screw hole, and the third screw hole are respectively connected to a first screw, a second screw, and a third screw. The extension direction of the first screw hole is perpendicular to the surface of the rod plate, and the extension directions of the second screw hole and the third screw hole are inclined to the surface of the rod plate. The inclination angle of the third screw hole is greater than that of the second screw hole. The length of the second screw is 2 mm longer than the length of the first screw, and the length of the third screw is 2 mm longer than the length of the second screw.

[0006] Preferably, in the above-mentioned minimally invasive plate for small incisions at the distal radius, the first screw hole is a pressure screw hole.

[0007] Preferably, in the above-mentioned minimally invasive steel plate for small incisions at the distal radius, the end plate body is provided with multiple universal screw holes.

[0008] Preferably, in the above-mentioned minimally invasive steel plate for small incisions at the distal radius, there are 6 universal screw holes arranged in two rows, with 2 holes in the row closer to the rod plate and 4 holes in the row further away from the rod plate.

[0009] Preferably, in the above-mentioned small-incision minimally invasive plate for the distal radius, the length of the first screw is measured according to the patient's fracture site.

[0010] Preferably, in the above-mentioned minimally invasive steel plate for the distal radius, Kirschner wire holes are formed on the rod plate body and the end plate body, respectively.

[0011] Preferably, in the above-mentioned small incision minimally invasive plate for the distal radius, the end plate body is thinned at the end away from the rod plate body.

[0012] Preferably, in the above-mentioned minimally invasive steel plate for small incisions at the distal radius, the axial distance between each pair of the first screw hole, the second screw hole, and the third screw hole is 8 mm.

[0013] Compared with existing technologies, the advantages of this technical solution lie in its smaller incision. The insertion method significantly reduces the incision size. Furthermore, the first screw hole is vertical, while the second and third screw holes are angled, allowing for operation even with a small incision. The three connected screws are arranged in a claw shape, and since they are not parallel, the pull-out resistance is increased. Moreover, a special tilt angle is designed. Since the screw length must be selected according to the patient's actual needs, the tilt design simplifies the process by measuring only the required length of the first screw perpendicular to the plate, allowing the other two screws to be increased accordingly. Attached Figure Description

[0014] 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 recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 The image shown is a perspective view of the minimally invasive steel plate with a small incision for the distal radius in an embodiment of this utility model.

[0016] Figure 2 The image shown is a top view of the minimally invasive steel plate used for small incisions at the distal radius in an embodiment of this utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be described in detail below with reference to the accompanying drawings. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] Combination Figure 1-2As shown, the minimally invasive steel plate 100 for small incisions in the distal radius includes an end plate 101 and a rod plate 102 connected in a T-shape. The end plate 101 is connected to one end of the rod plate 102 and is bent toward the top surface of the rod plate 102. An insertion tip 103 is formed at the end of the rod plate 102 away from the end plate 101. A first screw hole 104, a second screw hole 105, and a third screw hole 106 are sequentially arranged on the surface of the rod plate 102 along its extension direction from near the end plate 101 to the insertion tip 103. The first screw hole 104... The second screw hole 105 and the third screw hole 106 are respectively connected to the first screw (not shown in the figure), the second screw (not shown in the figure), and the third screw (not shown in the figure). The extension direction of the first screw hole 104 is perpendicular to the surface of the rod plate 102, while the extension directions of the second screw hole 105 and the third screw hole 106 are inclined to the surface of the rod plate 102, and the inclination angle of the third screw hole 106 is greater than that of the second screw hole 105. The length of the second screw is 2 mm longer than the length of the first screw, and the length of the third screw is 2 mm longer than the length of the second screw. The first screw hole 104 is a pressure screw hole. The end plate 101 is provided with multiple universal screw holes 107. There are 6 universal screw holes 107 arranged in two rows, with 2 holes in the row closer to the rod plate 102 and 4 holes in the row further away from the rod plate 102. The length of the first screw is measured according to the fracture site of the patient. Kirschner wire holes 108 are formed on the rod plate 102 and the end plate 101, respectively. The end plate 101 is thinned at the end furthest from the rod plate 102. The axial distance between each pair of the first screw hole 104, the second screw hole 105, and the third screw hole 106 is 8mm.

[0019] In this embodiment, the bone plate used in this technical solution is for the most common fracture site in the human body, the distal radius. Previously, this area was treated with an incision followed by plate and screw fixation, typically an incision of about 8 cm. Now, a minimally invasive surgical incision is used, requiring only 1.5 to 2 cm, achieved through an improved bone plate. Because the incision is smaller and skin traction is more significant, we designed the two proximal screws of the bone plate to be oblique. The second screw hole 105 and the third screw hole 106 are oblique, which reduces soft tissue traction during surgery. When rotating from distal to proximal to measure the depth and insert the screw, only an oblique angle is needed, further reducing soft tissue traction. Therefore, a smaller incision can be achieved. Furthermore, from an operational perspective... The first screw is inserted perpendicular to the plate and the bone surface. The second screw is about two millimeters longer than the first screw, and the third screw is four millimeters longer than the first screw. Usually, during the operation, the length of the second and third screws can be calculated by measuring the length of the first proximal screw, without the need for further measurement. This simplifies the surgical procedure because the inclination of the screw hole is measured preoperatively.

[0020] The advantages of this technical solution are:

[0021] 1. The proximal end of the bone plate is designed with a bullet-shaped tip for easy percutaneous insertion during surgery.

[0022] 2. All six locking holes at the far end are universal joints.

[0023] 3. The two locking pins near the heart end cannot be parallel to each other on the same plane; they need to be tilted at different angles, which will be detailed below.

[0024] 4. The overall length of the steel plate has been shortened, widened, and narrowed, making it suitable for percutaneous insertion. This is a bone plate specifically designed for minimally invasive surgery on the palmar side of the distal radius.

[0025] The design of this technical solution considers the following considerations regarding the inclination angles of the two nearest locking screws on the steel plate: The first cortical bone screw is driven perpendicularly into the steel plate through the elliptical hole; the depth of this screw needs to be measured. The locking screw closest to the cortical bone screw is set to be 2 mm longer than the cortical bone screw. Based on the length of the cortical bone screw, the second screw does not require depth measurement. Similarly, the nearest screw is set to be 4 mm longer than the cortical bone screw, and its length also does not need to be measured. This simplifies the entire operation, requiring only the measurement of the length of the first cortical screw. The common length of the first cortical screw is typically 16 mm. Based on trigonometric relationships, one leg of a right triangle is 16 mm, and the hypotenuse is 18 or 20 mm. Therefore, the inclination angle can be calculated.

[0026] This also ensures that the first cortical screw and the other two locking screws are arranged in a claw shape, and that the three screws are not parallel, which should increase the pull-out resistance. During the operation, depth is measured only once, focusing on the length that is easiest to expose and measure; other lengths are not measured.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0028] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A small incision minimally invasive plate for distal radius, characterized in that, The application relates to a T-shaped connecting end plate body and rod plate body, wherein the end plate body is connected to one end of the rod plate body and is bent towards the top surface of the rod plate body; the end of the rod plate body away from the end plate body is provided with an insertion tip; the surface of the rod plate body is sequentially provided with a first screw hole, a second screw hole and a third screw hole from the position close to the end plate body to the insertion tip along the extending direction of the rod plate body; the first screw hole, the second screw hole and the third screw hole are respectively connected to a first screw, a second screw and a third screw; the extending direction of the first screw hole is perpendicular to the surface of the rod plate body; the extending directions of the second screw hole and the third screw hole are inclined to the surface of the rod plate body; the inclined angle of the third screw hole is larger than that of the second screw hole; the length of the second screw is 2mm longer than that of the first screw; the length of the third screw is 2mm longer than that of the second screw.

2. The small incision, minimally invasive, distal radius plate of Claim 1, wherein, The first screw hole is a pressurized screw hole.

3. The small incision, minimally invasive, distal radius plate of Claim 1, wherein, The end plate body is provided with a plurality of universal screw holes.

4. The small-incision, minimally invasive, distal radius plate of Claim 3, wherein, The universal screw holes are arranged in two rows, wherein one row close to the rod plate body is provided with two universal screw holes and one row away from the rod plate body is provided with four universal screw holes.

5. The small-incision, minimally invasive, distal radius, buttress plate of Claim 1, wherein, The length of the first screw is measured according to the fractured position of a patient.

6. The small-incision, minimally invasive, distal radius, buttress plate of Claim 1, wherein, The rod plate body and the end plate body are respectively provided with Kirschner wire holes.

7. The small-incision, minimally invasive, distal radius, buttress plate of Claim 1, wherein, The end of the end plate body away from the rod plate body is designed to be thin.

8. The small-incision, minimally invasive, distal radius, buttress plate of Claim 1, wherein, The axial distance between the first screw hole, the second screw hole and the third screw hole is 8mm.

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