An anti-counter-rotation self-locking implant

Abstract

The present invention discloses an anti-counter-rotation self-locking implant screw, comprising: a screw portion for bone integration, with a thread for bone fixation provided on the outer side of the screw portion; a head, on which an installation hole is provided, and the installation hole is used for auxiliary arch installation. The axis of the installation hole is perpendicular to the axis of the screw portion, and moreover, the axis of the installation hole is misaligned with the axis of the screw portion along the axis direction of the screw portion; when the installation hole is stressed, its rotation axis is misaligned with the axis of the screw portion. By adopting the misaligned setting of the axis of the installation hole and the axis of the screw portion, it can be ensured that the rotation axis is misaligned with the axis of the screw portion when the installation hole is stressed, thereby realizing the anti-counter-rotation self-locking function. Thus, the operator can complete the implantation of the implant screw through a conventional angle, greatly reducing the surgical difficulty.

Description

Technical Field

[0001] The invention relates to the technical field of dental implants, and more particularly to an anti-reverse rotation self-locking implant nail. Background Art

[0002] During the orthodontic process, it is necessary to first place anchor pins on the tooth surface to provide a fixed source of force during the orthodontic process, and then further connect multiple teeth together through braces to provide continuous and stable traction for the teeth.

[0003] See attached Figure 1-2 The existing orthodontic appliance generally includes an auxiliary arch and an implant screw, wherein the implant screw is fixed in the bone by means of a thread and connected to one end of the auxiliary arch. During use, the existing implant screw will be reversed due to the traction force brought by the auxiliary arch, thereby causing the implant screw connection to become unstable. In response to this, the current clinical practice often adjusts the implant screw implantation angle from the general 45 degrees to 60 degrees-70 degrees to reduce the reversal force on the implant screw. However, this implantation angle has high requirements for the doctor's operation, resulting in greater difficulty in implantation, and therefore needs to be improved. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an anti-reverse rotation self-locking implant screw, which can avoid the instability of the connection caused by the force applied by the auxiliary arch, so as to ensure the stable connection with the bone and reduce the difficulty of the operation.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An anti-reverse rotation self-locking implant nail, comprising:

[0007] A screw part for bone integration, the screw part is provided with a thread for bone fixation;

[0008] A head, wherein a mounting hole is provided on the head, wherein the mounting hole is used for auxiliary bow installation, wherein the axis of the mounting hole is perpendicular to the axis of the screw portion, and the axis of the mounting hole is mutually misaligned with the axis of the screw portion along the direction of the axis of the screw portion;

[0009] When the installation hole is subjected to force, the rotation axis and the axis of the screw portion are misaligned with each other.

[0010] As a further improvement of the present invention, the thread is a self-tapping screw, and a healing groove extending along the axial direction of the screw portion is provided on one side of the self-tapping screw corresponding to the screw portion.

[0011] As a further improvement of the present invention, the shapes of the mounting holes include circular and square.

[0012] As a further improvement of the present invention, a connecting rod is provided on the head, and the head is connected to the screw part through the connecting rod. The connecting rod is inclined relative to the screw part so that the axis of the installation hole is misaligned with the axis of the screw part along the axis direction of the screw part.

[0013] As a further improvement of the present invention, the maximum included angle formed by the axis of the connecting rod and the axis of the screw part is 20 degrees.

[0014] As a further improvement of the present invention, the projected area of the connecting rod shrinks from the end close to the screw part to the end far from the screw part.

[0015] As a further improvement of the present invention, support plates are provided on both sides of the connecting rod. The support plates are respectively connected to the connecting rod and the screw part to provide support for one side of the support plate.

[0016] As a further improvement of the present invention, a base is formed at the upper end of the screw part, and the head is connected to one side of the base.

[0017] Advantages of the present invention:

[0018] 1. By adopting the misalignment setting of the axis of the installation hole and the axis of the screw part, it can ensure that the rotation axis is misaligned with the axis of the screw part when the installation hole is stressed, thereby realizing the anti-counter-rotation self-locking function. Thus, the operator can complete the implantation of the implant screw through a conventional angle, greatly reducing the surgical difficulty;

[0019] 2. By providing a healing groove on the self-tapping screw, the screw part can obtain a larger healing range during bone healing, improving the stability of the implant, and at the same time reducing the impact on screwing the screw part into the bone and subsequent removal from the bone;

[0020] 3. Due to the misalignment of the installation hole, it is possible to apply a downward force to the anterior tooth area by depressing the auxiliary arch on the basis of achieving a small implantation angle, while reducing the trauma of implanting nails in the anterior tooth area, and avoiding the problem of trauma caused by re-implanting loose nails in the anterior tooth area or uneven stress in the anterior tooth area due to loose nails. Description of the drawings

[0021] Figure 1 Schematic diagram of the installation of the auxiliary arch in the prior art;

[0022] Figure 2 Schematic diagram of the installation angle of the implant screw in the prior art;

[0023] Figure 3 Schematic diagram of the overall structure of the first embodiment of the present invention;

[0024] Figure 4 Schematic diagram of the overall structure of the second embodiment of the present invention;

[0025] Figure 5Schematic diagram of the overall third embodiment of the present invention;

[0026] Figure 6 Schematic diagram of the front - side installation on the human body of the present invention;

[0027] Figure 7 Schematic diagram of the side - side installation on the human body.

[0028] Reference numerals: 1, screw part; 2, thread; 3, base; 4, head; 5, mounting hole; 6, connecting rod; 7, support plate; 8, healing groove. Detailed implementation manners

[0029] The following combines the attached Figure 1-7 drawings and embodiments to further elaborate on the present invention in detail. Among them, the same components are denoted by the same reference numerals.

[0030] Figure 3 This is the first embodiment of the present invention, a reverse - rotation - preventing self - locking implant screw. The overall length of the implant screw includes at least two sizes, preferably 6mm, 8mm, and 10mm. Specifically, it includes: a screw part 1 for bone integration, and a thread 2 for bone fixation is provided outside the screw part 1. The screw part 1 is fixedly implanted into the bone through the thread 2.

[0031] Specifically, the thread 2 is a self - tapping screw to achieve implantation into the bone.

[0032] It further includes a head 4. A base 3 is provided at the top of the screw part 1. The base 3 includes a spherical shape, a polygon, or other regular and irregular shapes. The head 4 is fixedly connected to the base 3. An installation hole 5 is provided on the head 4. The installation hole 5 is used for the installation of an auxiliary arch. The installation hole 5 penetrates along the horizontal direction so that the axis of the installation hole 5 is perpendicular to the axis of the screw part 1.

[0033] Furthermore, the axis of the installation hole 5 is misaligned with the axis of the screw part 1 along the axis direction of the screw part 1. Thus, when the installation hole 5 is stressed, its rotation axis is misaligned with the axis of the screw part 1.

[0034] Specifically, the shape of the installation hole 5 includes a circular shape and a square shape to adapt to different models of auxiliary arches.

[0035] Due to the misaligned setting of the axis of the installation hole 5 with the axis of the screw part 1 along the axis direction of the screw part 1, when the installation hole 5 is stressed by the auxiliary arch, the torsional force takes the axis of the installation hole 5 as the center. And due to the misalignment of the axis of the installation hole 5, the torsional force will not affect the fixation of the screw part 1, thereby achieving the reverse - prevention self - locking effect.

[0036] Figure 4This is the second embodiment of the present invention. The difference from the above embodiment is that a connecting rod 6 is provided on the head 4. The head 4 is connected to the screw part 1 through the connecting rod 6. The connecting rod 6 is inclined relative to the screw part 1 so that the axis of the installation hole 5 is misaligned with the axis of the screw part 1 along the axis direction of the screw part 1.

[0037] Preferably, the maximum included angle formed by the axis of the connecting rod 6 and the axis of the screw part 1 is 20 degrees.

[0038] Through the connection method of the connecting rod 6, the installation hole 5 can obtain a larger adjustment range. Furthermore, by selecting the connecting rod 6 with a corresponding inclination angle, the adjustment of the angle range between the axis of the installation hole 5 and the axis of the screw part 1 can be realized.

[0039] Figure 5 This is the third embodiment of the present invention. The difference from the above embodiment is that the projected area of the connecting rod 6 shrinks from the end close to the screw part 1 to the end far from the screw part 1.

[0040] By setting the projected area, the root of the connecting rod 6 can obtain a larger diameter to improve its strength.

[0041] Furthermore, support plates 7 are provided on both sides of the connecting rod 6. The support plates 7 are respectively connected to the connecting rod 6 and the screw part 1 to provide support for one side of the support plate 7.

[0042] Through the setting of the support plate 7, the overall strength of the connecting rod 6 can be further improved to avoid breakage.

[0043] Preferably, a healing groove 8 extending along the axis direction of the screw part 1 is provided on one side of the self-tapping screw corresponding to the screw part 1.

[0044] Through the setting of the healing groove 8, a larger healing range can be obtained during the bone healing process to improve the bone healing effect. Furthermore, the connection strength between the screw part 1 and the bone can be improved to ensure stable connection.

[0045] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A reverse-rotation prevention self-locking planting nail, characterized in that, Comprising: A screw part (1) for osseointegration, with a thread (2) for bone fixation provided outside the screw part (1), and a base (3) provided at the top of the screw part (1); A head (4), the head (4) being fixedly connected to the base (3), with a mounting hole (5) provided on the head (4), the mounting hole (5) being for auxiliary arch installation, the axis of the mounting hole (5) being perpendicular to the axis of the screw part (1), and moreover, the axis of the mounting hole (5) being misaligned with the axis of the screw part (1) along the axis direction of the screw part (1); When the mounting hole (5) is stressed, its rotation axis is misaligned with the axis of the screw part (1); A connecting rod (6) is provided on the head (4), the head (4) is connected to the base (3) through the connecting rod (6), and the connecting rod (6) is inclined relative to the screw part (1) so that the axis of the mounting hole (5) is misaligned with the axis of the screw part (1) along the axis direction of the screw part (1); The maximum included angle formed by the axis of the connecting rod (6) and the axis of the screw part (1) is 20 degrees.

2. The anti-counter-rotation self-locking implanting nail according to claim 1, wherein The shape of the mounting hole (5) includes a circle and a square.

3. The anti-counter-rotation self-locking implanting nail according to claim 1, wherein, The projected area of the connecting rod (6) shrinks from the end close to the screw part (1) to the end away from the screw part (1).

4. A reverse rotation prevention self-locking type planting nail according to claim 1, characterized in that, Support plates (7) are provided on both sides of the connecting rod (6), and the support plates (7) are respectively connected to the connecting rod (6) and the screw part (1) to provide support for one side of the support plate (7).

5. The anti-counter-rotation self-locking implanting nail according to claim 4, characterized in that, The thread (2) is a self-tapping screw, and a healing groove (8) extending along the axis direction of the screw part (1) is provided on the side of the self-tapping screw corresponding to the screw part (1).

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