JP3244601U - Anchor screw to prevent soft tissue inflammation due to implantation - Google Patents

Abstract

The present invention provides an anchor screw that prevents soft tissue inflammation caused by implantation. A nail body (1) is a self-tapping screw and includes a thread segment (11) and a smooth portion (12). The smooth portion has a structure in which the diameter gradually increases from the end close to the thread to the end far from the thread, and one of the two end faces of the structure has a radial length of A barrier sheet 13 is provided which is larger than the maximum diameter of the structure. Nail head 2 includes a head portion 21 and a neck portion 22. The surface of the head is contoured for threaded engagement, and the neck connects the head and the nail body. The part of the anchor screw that penetrates the gingiva has a structure in which the diameter gradually increases, and this structure has a guiding effect on the gingiva, making it difficult for the gingiva to push inward and grow. A larger barrier sheet can further induce soft tissue growth and prevent anchor screw dislodgement due to the development of soft tissue inflammation. [Selection diagram] Figure 1

Description

The present invention relates to the field of orthodontics, and particularly to an anchorage screw that prevents soft tissue inflammation caused by implantation.

Common orthodontic treatments use micro-anchor screws to secure traction members and provide traction fulcrums to move teeth to designated locations. The conventional anchor screw structure is similar to a screw nail, with an elongated threaded part implanted into the alveolar bone, a smooth part at the back that penetrates the gingiva, and a thin pressure piece on top to press against the gingiva. However, in clinical practice, inflammation often occurs in the gingiva where anchor screws are implanted, and the inflamed gingiva further wraps around the gingival penetration part of the anchor screw and overcomes the pressure piece, thereby causing the anchor screw to loosen. , the dropout rate of implanted anchor screws on the buccal side reaches 75% or more. Therefore, there is a need to design anchor screws that can prevent soft tissue inflammation and control anchor screw dislodgement.

To achieve the above object, the present invention provides an anchor screw that prevents soft tissue inflammation due to implantation, and the anchor screw includes a nail body and a nail head. The nail body is a self-tapping screw and includes a thread segment and a smooth part in sequence. The smooth portion has a structure in which the diameter gradually increases from the end close to the thread to the end far from the thread, and has a radial length on one of the two end faces of the structure. A barrier sheet is provided whose diameter is larger than the maximum diameter of the structure. The nail head includes a head portion having a threaded engagement profile on its surface, and a neck portion connecting the head portion and the nail body.

Preferably, the structure is a truncated conical structure, the diameter of which gradually increases from the end close to the thread to the end far from the thread.

Preferably, the maximum diameter of the thread segment of the nail body is between 1.2 mm and 1.8 mm.

Preferably, the maximum diameter of the structure is between 1.5 mm and 2.2 mm, increasing in diameter from the end near the thread to the end far from the thread.

Preferably, the radial length of the barrier sheet is 0.2 mm to 1.0 mm greater than the maximum diameter of the structure, with the diameter gradually increasing from the end close to the thread to the end far from the thread. big. More preferably, the barrier sheet is circular and has a diameter of 2.0 mm to 3.0 mm.

Preferably, the axial length of the thread segment of the nail body is between 4.5 mm and 6.5 mm.

Preferably, the axial length of the structure is between 1.4 mm and 2.2 mm, with the diameter gradually increasing from the end close to the thread to the end remote from the thread.

Preferably, the thickness of the barrier sheet is 0.1 mm to 0.5 mm.

Preferably, the anchor screw is a manually threaded anchor screw.

Preferably, the end surfaces of the thread segments are provided with chip evacuation grooves. The chip evacuation channel is used to accommodate bone and tissue debris during the implantation process.

In a preferred embodiment of the present invention, a threaded groove is provided on the end surface of the head portion of the nail head. The screwing groove is used to provide a position for the screwing device (driver), and the contour of the screwing groove can be any shape that is easy to screw in, and is preferably cross-shaped.

In another preferred embodiment of the invention, the external shape of the head portion of the nail head is hexagonal, pentagonal, square or triangular.

Preferably, all bending angles on the surface of the anchor screw are smooth bending angles to avoid damaging soft tissue.

The axial direction of the present invention refers to the direction of the central axis of the cylindrical body where the nail body of the anchor screw is located, and the radial direction refers to the direction perpendicular to the central axis.

The implanted anchor screw of the present invention to prevent soft tissue inflammation has the following beneficial technical effects:
The part of the anchor screw of this invention that penetrates the gingiva (smooth part) has a structure in which the diameter gradually increases, and as the diameter increases gradually, it has a guiding effect on the gingiva, causing the gingiva to turn inward ( The phenomenon of extrusion and growth in the direction toward the central axis of the anchor screw is less likely to occur, and a barrier sheet with a larger area can further induce soft tissue growth, both of which affect anchor screw retention. This also prevents the anchor screw from falling out due to soft tissue inflammation.

In order to fully understand the purpose, features, and effects of the present invention, the concept, specific structure, and resulting technical effects of the present invention will be further explained below with reference to the drawings.

FIG. 1 is a schematic diagram of the front structure of an anchor screw in Example 1 of the present invention. FIG. 2 is a schematic diagram of the front structure of the anchor screw in Example 2 of the present invention. FIG. 3 is a schematic diagram of the planar structure of the anchor screw in Example 1 of the present invention. FIG. 4 is a schematic diagram of the planar structure of the anchor screw in Example 2 of the present invention. FIG. 5 is a schematic diagram of the planar structure of the anchor screw in Example 3 of the present invention.

The following is a detailed description of the embodiments of the present invention, examples of which are illustrated in the drawings, in which the same or similar symbols represent the same or similar components or structures having the same or similar functions. Indicates an element. The embodiments described below with reference to the drawings are illustrative and are intended to explain the present invention, but are not intended to limit the present invention.

Example 1
As shown in FIGS. 1 and 3, in a preferred embodiment of the present invention, the anchor screw for preventing soft tissue inflammation caused by implantation includes a nail body 1 and a nail head 2. The nail body 1 is a self-tapping screw and includes a thread segment 11 and a smooth part 12 in sequence. The surface of the thread segment 11 has a self-tapping thread, and the diameter of the smooth part gradually increases from the end near the thread (bottom) to the end far from the thread (top), forming a truncated conical structure. form 12. A barrier sheet 13 is provided at the top end of the truncated cone, the diameter of which is larger than the diameter of the top surface of the truncated cone, preferably from 0.1 mm to more than 0.5 mm. Nail head 2 includes a head portion 21 and a neck portion 22. The upper surface of the head portion 21 has a cross-shaped screw groove 211, and the neck portion 22 connects the head portion 21 and the nail body 1. A through hole or the like may be provided in the neck 22 for fixing the traction component. The outline of the screw groove 211 may be a straight line shape, and the outer outline of the head portion 21 may be pentagonal, hexagonal, or triangular.

Example 2
As shown in FIGS. 2 and 4, in another embodiment of the present invention, a barrier sheet 13 is provided at the bottom end of the truncated conical structure 12 of the smooth part. The screw groove 211, the head portion 21, the truncated conical structure 12, and the barrier sheet 13 can be seen in the plan view. The structures of Examples 1 and 2 in which the diameter of the smooth portion gradually increases from the end close to the thread to the end far from the thread are in the shape of a truncated cone. This structure is not unique; in other embodiments it may be a flared or funnel-like structure, and the maximum diameter of this structure is preferably between 1.5 mm and 2.2 mm; The maximum diameter of the barrier sheet is preferably between 2.0 mm and 3.0 mm, and the thickness is preferably between 0.1 and 0.5 mm.

Example 3
The barrier sheet 13 may have other shapes other than the circular shape of Examples 1 and 2, such as the hexagonal shape shown in FIG. It is sufficient if the diameter is 0.2 mm to 1.0 mm larger than the maximum diameter of the structure. The barrier sheet can further induce soft tissue growth and further prevent anchor screw dislodgement due to soft tissue inflammation.

Above, better specific embodiments of the present invention have been described in detail. It should be understood that those skilled in the art can make many amendments and changes based on the concept of the present invention without creative labor. Therefore, a technical solution that a person skilled in the art can obtain based on the concept of the present invention, based on the prior art, through logical analysis, deduction or limited experimentation is defined in the scope of the utility model registration claim. shall be within the scope of protection.

Claims (9)

Including the nail body and nail head,
the nail body is a self-tapping screw and includes, in order, a thread segment and a smooth part;
The smooth portion has a structure in which the diameter of the thread segment gradually increases from an end near the thread to an end far from the thread, and the smooth portion has a diameter that gradually increases from an end near the thread of the thread segment to an end far from the thread, and a barrier sheet having a radial length larger than the maximum diameter of the structure is provided on the end face;
the nail head includes a head portion and a neck portion;
The surface of the head portion has a contour for threading, and the neck portion connects the head portion and the nail body.
Anchor screw that prevents soft tissue inflammation due to implantation. The structure in which the diameter gradually increases from the end close to the thread to the end far from the thread is a truncated conical structure;
The anchor screw for preventing soft tissue inflammation caused by implantation according to claim 1. the maximum diameter of the thread segment of the nail body is between 1.2 mm and 1.8 mm;
The anchor screw for preventing soft tissue inflammation caused by implantation according to claim 1. The radial length of the barrier sheet is 0.2 mm to 1.0 mm larger than the maximum diameter of the structure, the diameter of which gradually increases from an end near the thread to an end far from the thread. That,
The anchor screw for preventing soft tissue inflammation caused by implantation according to claim 1. The thickness of the barrier sheet is 0.1 mm to 0.5 mm,
The anchor screw for preventing soft tissue inflammation caused by implantation according to claim 1. the axial length of the thread segment of the nail body is between 4.5 mm and 6.5 mm;
The anchor screw for preventing soft tissue inflammation caused by implantation according to claim 1. The axial length of the structure, the diameter of which gradually increases from the end close to the thread to the end far from the thread, is between 1.4 mm and 2.2 mm;
The anchor screw for preventing soft tissue inflammation caused by implantation according to claim 1. The surface of the end of the thread segment is provided with a chip evacuation groove;
The anchor screw for preventing soft tissue inflammation caused by implantation according to claim 1. A threaded groove is provided on the end surface of the head portion of the nail head;
The anchor screw for preventing soft tissue inflammation caused by implantation according to claim 1.

Images