Scoliosis orthopedic universal fastening nail structure

Abstract

The utility model discloses a scoliosis orthopedic universal fixing nail, which is characterized in that locking components matched with a ball-head-shaped nail cap are respectively embedded in the upper end and the lower end of the ball-head-shaped nail cap in a screw seat, and meanwhile, internal threads are formed in the screw seat to be matched with a locking cap to integrally fix the ball-head-shaped nail cap and the screw seat, namely when the locking cap is not tightened, the ball-head-shaped nail cap and the screw seat are locked; the ball-head-shaped screw cap is movably connected with the locking assembly in the screw base, the whole screw piece can move with the contact end of the ball-head-shaped screw cap and the screw base as the center, and after the locking cap is tightened, through the first locking assembly located at the upper end of the ball-head-shaped screw cap, the second locking assembly located at the lower end of the ball-head-shaped screw cap and the anti-skid structure arranged on the contact face, the ball-head-shaped screw cap can be locked. After the fixing nail is formed, the strength is enhanced, and the correction effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of spinal correction, in particular to a scoliosis correction universal fixing nail structure. Background Art

[0002] Scoliosis, also known as scoliosis, is a three-dimensional deformity of the spine, including abnormal sequences in the coronal, sagittal and axial planes. For the correction of scoliosis, spinal pedicle screws are often used for fixation and a spinal screw-rod system is constructed by connecting the screws and rods to achieve the correction effect. The nails in the spinal screw-rod system include universal nails and directional nails, each of which has its own advantages and disadvantages. Universal nails are convenient for installing the correction rod and can be applied in any direction; directional nails refer to nails that can only be applied in one direction. Compared with directional nails, universal nails do not significantly change the postoperative intervertebral disc angle, and the change in the intervertebral disc angle is less than that of unidirectional nails. The force to correct scoliosis deformity is weak, but it has advantages in the installation of correction rods.

[0003] Therefore, with respect to the nails in the spinal nail-rod system, the applicant proposes a universal fixation nail for scoliosis correction. Utility Model Content

[0004] The utility model aims to provide a scoliosis correction universal fixing nail structure, which integrates the advantages of a universal nail and a fixing nail, completes nail placement and rod insertion in the universal nail form, and then switches to the fixing nail form to enhance the correction effect.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0006] A scoliosis correction universal fixing nail structure comprises a screw component, a screw seat, a locking assembly and a locking cap, wherein the screw component is composed of a ball-shaped nail cap and a conical nail body, and U-shaped grooves are arranged on both side walls of the screw seat, and the ball-shaped nail cap penetrates into the screw seat from the bottom of the screw seat, and locking components cooperating with the ball-shaped nail cap are respectively inlaid at the upper and lower ends of the ball-shaped nail cap in the screw seat, and anti-slip structures are provided on the contact surfaces of the locking assembly and the ball-shaped nail cap, and the locking components respectively comprise a first locking assembly located at the upper end of the ball-shaped nail cap and a second locking assembly at the lower end, a groove cooperating with a connecting rod is provided at the upper end of the first locking assembly, and an internal thread is provided in the screw seat to cooperate with the locking cap to fix the ball-shaped nail cap and the screw seat as a whole.

[0007] Furthermore, the opening at the bottom of the screw seat does not exceed two-thirds of the maximum diameter of the ball-shaped nail cap.

[0008] Furthermore, the anti-slip structure of the contact surface between the locking assembly and the ball-shaped nail cap is a concave-convex matching structure.

[0009] Furthermore, the first locking assembly and the second locking structure are both spherical socket structures that cooperate with the ball-shaped nail cap.

[0010] Furthermore, the opening of the spherical socket structure of the second locking component is the same as the opening at the bottom of the screw seat. The second locking component is made of a material with a high friction coefficient and has an anti-slip pattern on the surface.

[0011] Furthermore, slots are evenly spaced from the upper end surface to the bottom of the ball-shaped nail cap, and the inner wall of the first locking component is equipped with a tenon structure that matches the slots.

[0012] The beneficial effects of the utility model are:

[0013] The screw cap is a kind of screw cap with a plurality of inner threads, and the inner threads of the screw cap are respectively provided with a plurality of locking assemblies which cooperate with the ball-shaped nail cap, and the locking assemblies in the screw cap are fixed to the screw cap and the screw cap as a whole. That is, when the locking assemblies are not tightened, the ball-shaped nail cap and the locking assemblies in the screw cap are movably connected. The integral screw part can move around the contact end of the ball-shaped nail cap and the screw cap as the center. After the locking assemblies are tightened, the first locking assembly at the upper end of the ball-shaped nail cap and the second locking assembly at the lower end, and the anti-skid structure provided on the contact surface are used to lock the screw cap into a whole. After the screw cap is formed into a fixing nail, the strength is enhanced and the correction effect is good. Considering the locking stability, the upper end surface of the ball-shaped nail cap is evenly spaced from the bottom to the bottom, and the inner wall of the first locking assembly is provided with a convex tenon structure which cooperates with the slot. When the screw cap is installed, the locking is realized by appropriate cooperation, so as to further enhance the connection stability and form the fixing nail.

[0014] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of the scoliosis correction universal fixation nail according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the connection between the screw member and the screw seat according to an embodiment of the present invention;

[0017] Figure 3 This is a plan view of the structure of the scoliosis correction universal fixation nail according to an embodiment of the present invention;

[0018] In the accompanying drawings, the components are numbered as follows:

[0019] 1-screw, 101-ball-shaped nail cap, 102-conical nail body, 103-anti-slip structure, 2-screw seat, 3-locking assembly, 301-second locking assembly, 302-first locking assembly. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0021] The utility model provides a universal fixing nail structure for scoliosis correction. The upper and lower ends of the ball-shaped nail cap 101 in the screw seat 2 are respectively inlaid with locking components 3 that match the ball-shaped nail cap 101. At the same time, an internal thread is provided in the screw seat 2 to match the locking cap to fix the ball-shaped nail cap 101 and the screw seat 2 as a whole. That is, when the locking cap is not tightened, the ball-shaped nail cap 101 and the locking component 3 in the screw seat 2 are movably connected. The overall screw member 1 can move around the contact end of the ball-shaped nail cap 101 and the screw seat 2. After tightening the locking cap, it is locked as a whole through the first locking component 302 at the upper end of the ball-shaped nail cap 101 and the second locking component 301 at the lower end, and the anti-slip structure 103 provided on the contact surface. After being formed into a fixing nail, the strength is enhanced and the correction effect is good.

[0022] The present invention will be described below in conjunction with specific embodiments:

[0023] like Figure 1-3 As shown: Example

[0024] In this embodiment,

[0025] A scoliosis correction universal fixing nail structure comprises a screw component 1, a screw seat 2, a locking component 3 and a locking cap, wherein the screw component 1 is composed of a ball-shaped nail cap 101 and a conical nail body 102, and the two side walls of the screw seat 2 are provided with U-shaped grooves, and the ball-shaped nail cap 101 penetrates into the screw seat 2 from the bottom of the screw seat 2, and the upper and lower ends of the ball-shaped nail cap 101 in the screw seat 2 are respectively inlaid with locking components 3 that cooperate with the ball-shaped nail cap 101, and the contact surfaces of the locking component 3 and the ball-shaped nail cap 101 are provided with anti-slip structures 103, and the locking components 3 respectively include a first locking component 302 located at the upper end of the ball-shaped nail cap 101 and a second locking component 301 at the lower end, and the upper end of the first locking component 302 is provided with a groove that cooperates with a connecting rod, and the screw seat 2 is provided with an internal thread to cooperate with the locking cap to fix the ball-shaped nail cap 101 and the screw seat 2 as a whole.

[0026] In this embodiment, the opening at the bottom of the screw seat 2 does not exceed two-thirds of the maximum diameter of the ball-shaped nail cap 101 .

[0027] In this embodiment, the anti-slip structure 103 of the contact surface between the locking assembly 3 and the ball-shaped nail cap 101 is a concave-convex matching structure.

[0028] In this embodiment, both the first locking assembly 302 and the second locking assembly 301 are spherical socket structures that cooperate with the ball-shaped nail cap 101.

[0029] In this embodiment, the opening of the spherical socket structure of the second locking component 301 is the same as the opening at the bottom of the screw seat 2. The second locking component 301 is made of a material with a high friction coefficient and has an anti-slip pattern on the surface.

[0030] In this embodiment, the ball-shaped nail cap 101 has slots evenly spaced from the upper end surface to the bottom, and the inner wall of the first locking component 302 is provided with a tenon structure matching the slots.

[0031] In this embodiment, when the locking cap is not tightened, the ball-shaped nail cap 101 and the locking component 3 in the screw seat 3 are movably connected, and the integral screw member can move around the contact end of the ball-shaped nail cap 101 and the screw seat 2. After the locking cap is tightened, the first locking component 302 at the upper end of the ball-shaped nail cap 101 and the second locking component 301 at the lower end, as well as the anti-slip structure 103 provided on the contact surface, are used to lock the screw into one piece, and the strength of the fixed nail is enhanced after being formed, and the correction effect is good.

[0032] In this embodiment, considering the stability of locking, slots are evenly spaced from the upper end surface to the bottom of the ball-shaped nail cap 101, and the inner wall of the first locking component 302 is installed with a tenon structure that cooperates with the slot. During installation, proper cooperation is carried out to achieve locking, further enhance the connection stability, and form it into a fixed nail.

[0033] In this embodiment, the upper surface structure design of the first locking component 302 takes into account the connection with the "rod" of the nail rod system. An arc groove is designed on the upper surface of the first locking component 302, and a circular arc transition is adopted between the arc groove and the edge. After the first locking component 302 contacts the "rod", the "rod" can slide into the arc groove on the upper surface for contact and fixation to avoid displacement. At the same time, the sliding-in process is convenient for operation, thereby solving the technical problems existing in the prior art.

[0034] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. According to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A scoliosis correction universal fixation nail structure, characterized in that: It includes a screw component, a screw seat, a locking assembly and a locking cap, wherein the screw component is composed of a ball-shaped nail cap and a conical nail body, U-shaped grooves are provided on both side walls of the screw seat, the ball-shaped nail cap penetrates into the screw seat from the bottom of the screw seat, and locking components that cooperate with the ball-shaped nail cap are respectively inlaid at the upper and lower ends of the ball-shaped nail cap in the screw seat, and anti-slip structures are provided on the contact surfaces of the locking assembly and the ball-shaped nail cap, and the locking components respectively include a first locking assembly located at the upper end of the ball-shaped nail cap and a second locking assembly at the lower end, a groove that cooperates with a connecting rod is provided at the upper end of the first locking assembly, and an internal thread is provided in the screw seat to cooperate with the locking cap to fix the ball-shaped nail cap and the screw seat as a whole.

2. A scoliosis correction universal fixation nail structure as claimed in claim 1, characterized in that: The opening at the bottom of the screw seat does not exceed two-thirds of the maximum diameter of the ball-shaped nail cap.

3. The scoliosis correction universal fixation nail structure according to claim 1, characterized in that: The anti-slip structure of the contact surface between the locking assembly and the ball-shaped nail cap is a concave-convex matching structure.

4. The scoliosis correction universal fixation nail structure according to claim 1, characterized in that: The first locking assembly and the second locking structure are both spherical socket structures that cooperate with the ball-shaped nail cap.

5. The scoliosis correction universal fixation nail structure according to claim 4, characterized in that: The spherical socket structure of the second locking component has an opening which is the same as the opening at the bottom of the screw seat. The second locking component is made of a material with a high friction coefficient and has anti-slip patterns on the surface.

6. The scoliosis correction universal fixation nail structure according to claim 1, characterized in that: The upper edge of the ball-shaped nail cap is provided with slots at even intervals from the upper end surface to the bottom, and the inner wall of the first locking component is provided with a tenon structure matching with the slots.

Images