A nail head replaceable implantation nail

Abstract

The application discloses a replaceable implant nail head, and relates to the technical field of implant nails, which comprises a nail head, a nail neck and a nail body, the nail head is integrally formed with the nail neck, the nail neck is provided with a mounting cavity, a clamping block capable of being positionally adjusted in the radial direction is arranged in the mounting cavity in the circumferential direction, a sleeve capable of outwardly spreading the clamping block is detachably inserted into the mounting cavity from the outside to the inside, a connecting device can be guided to be inserted into the mounting cavity in the sleeve, the clamping block can clamp the connecting device after the connecting device is inserted into the mounting cavity and the sleeve is taken out, and the connecting device is used for connecting the nail head. The connecting device can replace the nail head meeting the mechanical requirements of correction, the trouble of re-implanting the implant nail when the nail head does not meet the mechanical requirements is avoided, secondary trauma is eliminated, and the treatment period and the diagnosis and treatment efficiency are not affected.

Description

Technical Field

[0001] This application relates to the field of implant nail technology, specifically to an implant nail with a replaceable nail head. Background Technology

[0002] Orthodontic implants, also known as temporary anchorage devices, are an important component of the orthodontic anchorage system. They provide a stable anchor point for corrective forces through intraosseous implantation, thus providing strong anchorage. Implants can be categorized by material, such as stainless steel and titanium alloy; their designs also vary, but the basic structure includes three parts: the implant head, the implant neck, and the implant body. The implant head is designed with a polygonal or grooved shape to facilitate force application, often with a traction hole structure, allowing for insertion or removal using appropriate instruments. The implant neck is a smooth, narrowed area located between the implant head and body, ensuring soft tissue closure and preventing inflammation. The implant body is designed with a threaded structure of different diameters (commonly 1.2mm-2.0mm) and lengths, forming a mechanical fit with the jawbone through precise thread design. Its surface can be treated with sandblasting, acid etching, or a bio-coating to enhance osseointegration. The implant head, as the only part of the implant exposed to the oral environment, is the direct interface for orthodontists to operate and apply corrective forces. The implant head consists of two basic functional structures: ① Force application structure: driven by a dedicated screwdriver (wrench) for insertion and removal. ② Traction structure: for suspending ligature wires, elastic chains or rubber bands to transmit corrective force.

[0003] Commonly used nail heads include the following:

[0004] 1. Cross-grooved / slotted nail heads: These nail heads have a cross-shaped or slotted groove in the center of the top. They typically do not come with hooks or holes, requiring ligating wire to be wrapped around the nail neck for ligation. This method is relatively inconvenient, and the ligation stability is sometimes poor. They are now largely obsolete.

[0005] 2. Through-hole type nail head: This design combines the force-applying structure and the traction structure into one. A horizontal through-hole is designed in the center or side of the nail head. This hole can be used to pass through the ligature wire for a figure-eight ligation, or to directly suspend a rubber band.

[0006] 3. Polygonal columnar nail head: This is currently the mainstream design optimized specifically for implant nails. The nail head is designed as a regular polygonal column, commonly hexagonal, quadrilateral, or triangular. Similarly, a simple columnar structure without additional traction devices still requires ligating wire.

[0007] 4. Integrated traction hook head: Based on a polygonal columnar head, one or more traction hooks are integrated. This traction hook can be an independent ring or semi-ring structure extending from the side of the head. Doctors can directly attach elastic chains, rubber bands, or ligatures to the traction hook without the need for cumbersome ligation, greatly saving clinical operation time, but the feeling of a foreign body is stronger.

[0008] The shortcomings of existing implant heads are as follows: Current mainstream implant designs have significant functional limitations when dealing with complex and ever-changing clinical orthodontic needs. While polygonal columnar implant heads possess efficient torque transmission performance, the lack of a dedicated traction structure makes it difficult to flexibly adapt to the constantly changing force direction during treatment. If a change in the biomechanical approach is required in the later stages of treatment, additional traction attachments are usually glued into the patient's mouth, which is not only cumbersome but also significantly increases clinical difficulty and uncertainty. While integrated traction hook implant heads improve ligation convenience, their traction hook shape and direction are fixed, preventing multi-dimensional traction, and their protruding structure often exacerbates the patient's soft tissue foreign body sensation and discomfort. More importantly, once an implant is placed, its function is fixed. If it is found in subsequent treatment that the implant head cannot meet the orthodontic biomechanical requirements, the only solution is to remove the entire implant and re-implant it. This not only causes secondary trauma to the patient but also prolongs the entire treatment cycle, affecting treatment efficiency. Utility Model Content

[0009] The main purpose of this application is to provide an implant with a replaceable head, which aims to solve the technical problem that the integrated design of the head, body and neck of the implant leads to the need for re-implantation of the entire implant when the head cannot meet the orthodontic mechanical requirements in subsequent treatments.

[0010] The technical solution adopted in this application is as follows:

[0011] A replaceable-head implant pin includes a pin head, a neck, and a body. The pin head and neck are integrally formed. The neck has an installation cavity. A snap-fit ​​block that can be adjusted radially is circumferentially disposed within the installation cavity. A sleeve that can push the snap-fit ​​block outward is detachably inserted into the installation cavity from the outside to the inside. A connecting device can be guided into the installation cavity through the sleeve. The snap-fit ​​block can clamp the connecting device after the connecting device is inserted into the installation cavity and the sleeve is removed. The connecting device is used to connect the pin head.

[0012] Furthermore, the inner wall of the mounting cavity is provided with a first shoulder ring, the first shoulder ring is provided with a sliding groove for the snap-fit ​​block to slide, and a first spring is provided between the snap-fit ​​block and the inner wall of the mounting cavity.

[0013] Furthermore, the inner wall of the mounting cavity is provided with a second shoulder ring, and a second spring is provided on the second shoulder ring. The outer wall of the sleeve is provided with a first outer ring, which is used to compress the second spring when the sleeve is inserted into the mounting cavity.

[0014] Furthermore, the outer wall of the sleeve is provided with a second outer ring, which is used to press the sleeve.

[0015] Furthermore, the inner bottom surface of the mounting cavity is provided with a plurality of positioning protrusions, and the bottom of the connecting device is provided with positioning grooves corresponding one-to-one with the positioning protrusions.

[0016] Furthermore, the connecting device is a T-shaped column.

[0017] Compared with the prior art, the beneficial effects of this application are:

[0018] This application proposes a replaceable implant screw. By setting a replaceable connecting device, the screw head is fixed to the connecting device. Thus, when the screw head cannot meet the orthodontic mechanical requirements after implantation, the connecting device can be replaced to replace the screw head that meets the orthodontic mechanical requirements. This avoids the trouble of re-implanting the implant screw when the screw head does not meet the mechanical requirements, thereby eliminating secondary trauma and not affecting the treatment cycle and treatment efficiency. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a replaceable-head implant nail provided in an embodiment of this application;

[0020] Figure 2 A cross-sectional view of a replaceable implantation nail provided in an embodiment of this application;

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 An exploded cross-sectional view of a replaceable-head implant nail provided in an embodiment of this application;

[0023] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0024] Figure 6 This is a schematic diagram of the connecting device.

[0025] Explanation of the labels in the attached drawings:

[0026] 1- Nail body, 2- Nail neck, 3- Positioning protrusion, 4- First shoulder ring, 5- Second shoulder ring, 6- Slide groove, 7- Snap-fit ​​block, 8- First spring, 9- Second spring, 10- Sleeve, 11- First outer ring, 12- Second outer ring, 13- Connecting device, 14- Positioning groove. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0028] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0029] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0031] See attached document Figures 1 to 6As shown, this application embodiment provides a replaceable implant nail, including a nail head, a nail neck 2, and a nail body 1. The nail head and nail neck 2 are integrally formed. The nail neck 2 has an installation cavity, which is open on the side away from the nail head. Multiple positioning protrusions 3 are provided on the inner bottom surface of the installation cavity. A first shoulder ring 4 and a second shoulder ring 5 are sequentially arranged at intervals from bottom to top on the inner wall of the installation cavity. The first shoulder ring 4 and the second shoulder ring 5 have circular holes with the same inner diameter. When the locking block 7 is in its original state, the locking block 7 is located inside the circular hole. Multiple sliding grooves 6 are provided circumferentially on the first shoulder ring 4, extending radially along the first shoulder ring 4. The locking block 7 is slidably disposed within the sliding grooves 6, and the locking block 7 engages with the installation... The inner walls of the cavity are connected by a first spring 8. A second spring 9 is fixedly installed on the second shoulder ring 5. A sleeve 10 is inserted into the mounting cavity. The outer diameter of the sleeve 10 matches the inner diameter of the first shoulder ring 4. The sleeve 10 passes through the round holes inside the first shoulder ring 4 and the second shoulder ring 5 and is inserted into the mounting cavity to push the snap-fit ​​block 7 outward. The outer wall of the sleeve 10 is provided with a first outer ring 11 and a second outer ring 12 from bottom to top. The first outer ring 11 compresses the second spring 9 when the sleeve 10 is inserted into the mounting cavity. The second outer ring 12 is located on the outer end face of the sleeve 10, which facilitates the application of force to press the sleeve 10 into the mounting cavity. A connecting device 13 can be inserted into the sleeve 10. The connecting device 13 is used to connect the nail head. The connecting device 13 is a T-shaped post, and the maximum outer diameter end face of the connecting device 13 matches the inner diameter of the sleeve 10. In addition, the bottom of the connecting device 13 is provided with a positioning groove 14 corresponding to the positioning protrusion 3.

[0032] Based on the above, this application provides an implant nail with a replaceable head, the process of replacing the head being as follows:

[0033] First, the sleeve 10 is pressed and inserted into the round hole inside the first shoulder ring 4 and the second shoulder ring 5. During the insertion of the sleeve 10, the first outer ring 11 compresses the second spring 9. As the sleeve 10 is continuously inserted into the mounting cavity, the snap-fit ​​block 7 is pushed to both sides, and the first spring 8 is compressed, providing a channel for the subsequent insertion of the connecting device 13.

[0034] After the sleeve 10 is inserted into the bottom of the mounting cavity, the connecting device 13 with the nail head is then inserted from inside the sleeve 10. After the connecting device 13 is inserted into the bottom of the mounting cavity, the positioning groove 14 at the bottom of the connecting device 13 is rotated to successfully align with the positioning protrusion 3, thereby preventing the connecting device 13 from rotating after successful installation.

[0035] After the connecting device 13 is installed, the pressure applied to the sleeve 10 is released, the second spring 9 returns to its original position and lifts the sleeve 10. The sleeve 10 loses its obstruction to the snap-fit ​​block 7. Under the action of the first spring 8, the snap-fit ​​block 7 returns to its original position and converges towards the center, thereby snapping onto the T-shaped head of the connecting device 13 and clamping the connecting device 13 to complete the installation of the nail head.

[0036] It should be noted that in this embodiment, the nail head can be integrally formed on the connecting device, or a hole for embedding the nail head can be provided on the connecting device. Regardless of the design, each nail head corresponds to a separate connecting device.

[0037] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A replaceable-head implant nail, comprising a nail head, a nail neck, and a nail body, characterized in that, The nail head and nail neck are integrally formed. The nail neck is provided with an installation cavity. A snap-fit ​​block that can be adjusted radially is provided circumferentially inside the installation cavity. A sleeve that can push the snap-fit ​​block outward is detachably inserted from the outside to the inside of the installation cavity. A connecting device can be guided into the installation cavity through the sleeve. The snap-fit ​​block can clamp the connecting device after the connecting device is inserted into the installation cavity and the sleeve is removed. The connecting device is used to connect the nail head.

2. The implant nail with replaceable head according to claim 1, characterized in that, The inner wall of the mounting cavity is provided with a first shoulder ring, and the first shoulder ring is provided with a sliding groove for the snap-fit ​​block to slide. A first spring is provided between the snap-fit ​​block and the inner wall of the mounting cavity.

3. The implant nail with replaceable head according to claim 1, characterized in that, The inner wall of the mounting cavity is provided with a second shoulder ring, and a second spring is provided on the second shoulder ring. The outer wall of the sleeve is provided with a first outer ring, which is used to compress the second spring when the sleeve is inserted into the mounting cavity.

4. The implant nail with replaceable head according to claim 2, characterized in that, The outer wall of the sleeve is provided with a second outer ring, which is used to press the sleeve.

5. The implant nail with replaceable head according to claim 1, characterized in that, The inner bottom surface of the mounting cavity is provided with a plurality of positioning protrusions, and the bottom of the connecting device is provided with positioning grooves that correspond one-to-one with the positioning protrusions.

6. The implant nail with replaceable head according to claim 1, characterized in that, The connecting device is a T-shaped column.

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