Medical rotatable double-end nail

Abstract

The utility model provides a medical rotatable double-end nail, and belongs to the technical field of medical instruments. Comprising a first screw head nail, a pedicle screw is inserted into the first screw head nail, a rotating assembly is clamped to the bottom of the first screw head nail, and a second screw head nail is rotationally connected to the top of the rotating assembly. The second screw head nail can rotate along the rotating assembly to be adjusted to the optimal position and then compress the pedicle screw through the threaded pressing nail, so that the purpose of fixing is achieved, and shaking caused by long-time use is avoided; meanwhile, the situation that due to the fact that the position of the second screw head nail is fixed, the thoracolumbar spine posterior bone nail system is arranged disorderly, more area is occupied, and the thoracolumbar spine posterior bone nail system makes contact with tissue in the human body, so that postoperative discomfort is caused is avoided, and the first screw head nail and the second screw head nail can rotate to adjust the direction to reach the optimal angle; and the rotating assembly and the second screw head nail are of an integrated structure, so that the mounting and using steps are optimized, and the practicability is better.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a medical rotatable double-head nail. Background Art

[0002] The posterior thoracic and lumbar bone screw system usually consists of multiple components such as double-headed screws, titanium rods, connecting devices, universal balls, etc. It is generally made of titanium alloy, pure titanium, cobalt-chromium-molybdenum, polyetheretherketone and other materials. It can be used to fix spinal segments. After scoliosis correction surgery, especially for obese patients, the probability of broken rods within two years is about 4%. To prevent the titanium rod from breaking, multiple horizontally connected titanium rods are added to the peri-osteotomy area during surgery to increase the strength of the spinal internal fixation system. This is a common method of surgery now. Most of the existing double-headed screws have slots on the top to connect the horizontal and longitudinal titanium rods.

[0003] However, in actual use, it was found that due to the mountain-like shape of the spine, the titanium rods on the transverse lines between the fastening titanium rods need to be bent multiple times to achieve the effect of fastening the connection, and the existing technology supports the transverse and longitudinal screw heads of the titanium rods for fixed connection, with a single angle and direction, and the ups and downs of the spinal segments are complex. In order to lay a more reasonable line and minimize the contact between the surface occupied by the bone screw system and the internal tissues of the human body, the existing technology does not meet the needs of actual use. At the same time, during the installation of the posterior thoracic and lumbar bone screw system, the installation of the screw heads of the transverse lines lacks pre-fixation and support points, resulting in inconvenient installation. Therefore, the present application provides a medical rotatable double-headed nail to meet the needs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a medical rotatable double-head nail to solve the problem that the existing titanium rod needs to be bent multiple times to be connected and pre-fixed with the screw head.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A medical rotatable double-head nail comprises a first screw head nail, a pedicle screw is inserted in the first screw head nail, a rotating assembly is clamped at the bottom of the first screw head nail, and a second screw head nail is rotatably connected to the top of the rotating assembly.

[0007] Preferably, a rotation groove is formed on the outer side wall surface of the second screw.

[0008] Preferably, the rotating assembly comprises a connecting plate, one end of the connecting plate is fixedly connected to the first tray, and the other end of the connecting plate is fixedly connected to the second tray.

[0009] Preferably, a plurality of first weight-reducing grooves are provided on the surface of the connection plate, and the first weight-reducing grooves are elliptical in shape.

[0010] Preferably, a silicone ring is fixedly connected to the top surface of the first tray, and a plurality of anti-slip grooves are provided on the surface of the silicone ring.

[0011] Preferably, a protrusion is fixedly connected to the top of the second tray, and the protrusion is matched with the rotating groove.

[0012] Preferably, a second weight-reducing groove is provided on the surface of the second tray, and the second weight-reducing groove is circular in shape.

[0013] Preferably, the pedicle screw comprises a universal ball, and the diameter of the universal ball is larger than the bottom groove of the first screw head nail.

[0014] Compared with the prior art, the utility model has at least the following beneficial effects:

[0015] In the above scheme, by setting a rotating component, the second screw head nail can be rotated along the rotating component to adjust to the optimal position and then the pedicle screw can be tightened by the threaded compression nail, thereby achieving the purpose of fixation to avoid shaking during long-term use. At the same time, it also avoids the disordered arrangement of the posterior thoracic and lumbar bone screw system caused by the position fixation of the second screw head nail, thereby occupying more area and contacting the tissue in the human body to cause postoperative discomfort. By setting a connecting plate, the first screw head nail and the second screw head nail can both be rotated to adjust the direction to reach the optimal angle, and the rotating component and the second screw head nail are an integrated structure, which optimizes the installation and use steps and is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of a medical rotatable double-headed nail;

[0018] Figure 2 It is a schematic diagram of a partially cutaway three-dimensional structure of a medical rotatable double-headed nail;

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is an enlarged schematic diagram of the three-dimensional structure of the rotating component.

[0021] [reference numerals]

[0022] 1. First screw; 2. Second screw; 21. Rotation slot; 3. Rotation assembly; 31. Connecting plate; 32. First weight-reducing slot; 33. Silicone ring; 34. Anti-skid slot; 35. First tray; 36. Second tray; 37. Bump; 38. Second weight-reducing slot; 4. Pedicle screw; 41. Universal ball.

[0023] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0024] The following is a detailed description of a medical rotatable double-headed nail provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0025] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0026] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0027] It will be understood that the meaning of “on,” “over,” and “above” in this disclosure should be interpreted in the broadest manner, so that “on” means not only “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” means not only “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0028] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0029] like Figure 1-Figure 3 As shown, the embodiment of the utility model provides a medical rotatable double-headed nail, including a first screw nail 1, a pedicle screw 4 is inserted inside the first screw nail 1, a rotating assembly 3 is clamped at the bottom of the first screw nail 1, and a second screw nail 2 is rotatably connected to the top of the rotating assembly 3. A rotating groove 21 is opened on the outer wall surface of the second screw nail 2, and a protrusion 37 is fixedly connected to the top of the second tray 36, and the protrusion 37 is adapted to the rotating groove 21. The pedicle screw 4 includes a universal ball 41, and the diameter of the universal ball 41 is larger than the groove at the bottom of the first screw nail 1. The advantage of this arrangement is that By setting up the rotating component 3, the second screw head nail 2 can be rotated along the rotating component 3 to adjust to the optimal position and then the pedicle screw 4 can be pressed by the threaded pressure nail. The silicone ring 33 is squeezed, expanded and deformed by the universal ball 41 on the top of the pedicle screw 4. The second screw head nail 2 adjusts its direction to find the optimal connection angle and then connects to the titanium rod to limit rotation, thereby achieving the purpose of fixation to avoid shaking during long-term use. At the same time, it also avoids the disordered arrangement of the posterior thoracic and lumbar bone screw system caused by the position fixation of the second screw head nail 2, thereby occupying more area to contact with tissues in the human body to cause postoperative discomfort.

[0030] like Figure 1 and Figure 4As shown, the rotating assembly 3 includes a connecting plate 31, one end of the connecting plate 31 is fixedly connected to a first tray 35, the other end of the connecting plate 31 is fixedly connected to a second tray 36, a plurality of first weight-reducing grooves 32 are provided on the surface of the connecting plate 31, and the first weight-reducing grooves 32 are elliptical in shape, a silicone ring 33 is fixedly connected to the top surface of the first tray 35, and a plurality of anti-slip grooves 34 are provided on the surface of the silicone ring 33, when the first screw head nail 1 is connected to the rotating assembly 3 through the silicone ring 33, the silicone ring 33 plays the role of initial limiting, a second weight-reducing groove 38 is provided on the surface of the second tray 36, and the second weight-reducing groove 38 is circular in shape, so that it is well arranged. The advantage is that by setting the connecting plate 31, the first screw 1 and the second screw 2 can be rotated to adjust the direction to reach the optimal angle while staggering the titanium rod connection lines to avoid crossing, and the rotating component 3 and the second screw 2 are an integrated structure, and the silicone ring 33 is connected to the bottom groove of the first screw 1 at the position where the second screw 2 is required to be placed, and the threaded pressure nail is tightened to complete the installation, which optimizes the installation and use steps and is more practical. By setting the first weight-reducing groove 32 and the second weight-reducing groove 38, the weight of the device can be reduced while retaining the integrity of the device functions, thereby reducing the weight of the user and obtaining a better experience.

[0031] The technical solution provided by the utility model is that by setting a rotating component, the second screw head nail can be rotated along the rotating component to adjust to the optimal position and then the pedicle screw can be compressed by the threaded compression nail. The silicone ring is squeezed, expanded and deformed by the universal ball on the top of the pedicle screw. The second screw head nail adjusts the direction to find the optimal connection angle and then connects to the titanium rod to limit rotation, thereby achieving the purpose of fixation to avoid shaking during long-term use. At the same time, it also avoids the disordered arrangement of the posterior thoracic and lumbar bone screw system caused by the position fixation of the second screw head nail, thereby occupying more area and contacting with tissues in the human body to cause postoperative discomfort. By setting a connecting plate, the first screw head nail and the second screw head nail can both be rotated to adjust the direction to reach the optimal angle while staggering the titanium rod connection line to avoid crossing. The rotating component and the second screw head nail are an integrated structure. At the position where the second screw head nail needs to be placed, its silicone ring is connected to the groove at the bottom of the first screw head nail and the threaded compression nail is tightened to complete the installation. The installation and use steps are optimized and the practicality is better. By setting the first weight-reducing groove and the second weight-reducing groove, the weight of the device can be reduced while retaining the integrity of the device function, thereby reducing the weight of the user and obtaining a better experience.

[0032] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0033] A person skilled in the art will appreciate that all or part of the steps in the above-mentioned embodiment method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc.

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A medical rotatable double-headed nail, characterized in that: include: A first screw head nail, wherein a pedicle screw is inserted in the interior of the first screw head nail, a rotating assembly is clamped at the bottom of the first screw head nail, and a second screw head nail is rotatably connected to the top of the rotating assembly; The rotating assembly comprises a connecting plate, one end of which is fixedly connected to the first tray, and the other end of which is fixedly connected to the second tray; A silicone ring is fixedly connected to the top surface of the first tray, and a plurality of anti-slip grooves are provided on the surface of the silicone ring; The pedicle screw comprises a universal ball, and the diameter of the universal ball is larger than the bottom groove of the first screw head.

2. The medical rotatable double-headed nail according to claim 1, characterized in that: A rotation groove is formed on the outer side wall surface of the second screw.

3. The medical rotatable double-headed nail according to claim 1, characterized in that: A plurality of first weight-reducing grooves are formed on the surface of the connecting plate 31 , and the first weight-reducing grooves are elliptical in shape.

4. The medical rotatable double-headed nail according to claim 2, characterized in that: A protrusion is fixedly connected to the top of the second tray, and the protrusion is matched with the rotating groove.

5. The medical rotatable double-headed nail according to claim 1, characterized in that: A second weight-reducing groove is formed on the surface of the second tray, and the second weight-reducing groove is circular in shape.

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