A double-lock type abutment structure

Abstract

This application discloses a double-locking abutment structure, relating to the field of oral implant technology. It includes an abutment body and a central screw. The end of the abutment body is inserted into the implant. An installation hole is formed within the abutment body. The central screw is slidably disposed within the installation hole of the abutment body. A limiting sleeve is fixedly provided at the end of the abutment body, and an elastic groove is formed on the limiting sleeve. The end of the central screw passes through the limiting sleeve and is threadedly connected to the implant. The central screw causes the elastic groove to expand, causing the limiting sleeve to press against the implant. When connecting the abutment body and the implant, the abutment body is first inserted into the implant, and then the central screw is installed in the installation hole of the abutment body. The end of the central screw passes through the limiting sleeve and connects to the implant. During the connection process, the central screw causes the elastic groove to expand, causing the limiting sleeve to expand outward and press against the implant, thereby locking the abutment body and making the connection between the abutment and the implant more stable.

Description

Technical Field

[0001] This application relates to the field of oral implant technology, and in particular to a double-locking abutment structure. Background Technology

[0002] Currently, when using implants and abutments, they are mainly locked together by the external thread of the central screw and the internal thread of the implant. This creates a compression effect after the abutment and implant are connected, thereby eliminating the gap between the conical surface of the implant's inner hole and the conical surface of the abutment.

[0003] However, in clinical practice, the problem of excessively large gaps during surgery occurs frequently. Later, when patients bite, under the intermittent biting force, due to the already large gap, the abutment is squeezed to make the gap smaller when force is applied, and the gap widens again when the force is released. After multiple cycles of this process, the gap will increase, eventually leading to the abutment loosening and failure. Utility Model Content

[0004] To increase the stability of the connection between the abutment and the implant, this application provides a double-locking abutment structure.

[0005] The double-locking base structure provided in this application adopts the following technical solution:

[0006] A double-locking abutment structure includes an abutment body and a central screw. The end of the abutment body is inserted into an implant. An installation hole is provided in the abutment body. The central screw is slidably disposed in the installation hole of the abutment body. A limiting sleeve is fixedly provided at the end of the abutment body. An elastic groove is provided on the limiting sleeve. The end of the central screw passes through the limiting sleeve and is threadedly connected to the implant. The central screw drives the elastic groove to open and makes the limiting sleeve press against the implant.

[0007] By adopting the above technical solution, when connecting the abutment body and the implant, the abutment body is first inserted into the implant, and then the central screw is installed in the mounting hole of the abutment body. The end of the central screw passes through the limiting sleeve and connects with the implant. During the connection process, the central screw will drive the elastic groove to open, so that the limiting sleeve expands outward and presses against the implant, thereby locking the abutment body and making the connection between the abutment and the implant more stable.

[0008] Preferably, a first conical portion is formed on the outer wall of the central screw, the diameter of the first conical portion gradually decreases from top to bottom, a first conical surface is formed inside the limiting sleeve, the diameter of the first conical surface gradually decreases from top to bottom, and the first conical portion fits into the first conical surface.

[0009] By adopting the above technical solution, when the central screw is screwed into the implant, the central screw drives the first conical part to move, and the first conical part drives the elastic groove to open through the first conical surface, thereby locking the abutment body.

[0010] Preferably, a second conical portion is formed on the outer wall of the central screw, the diameter of the second conical portion gradually decreases from top to bottom, a second conical surface is formed in the base body, the diameter of the second conical surface gradually decreases from top to bottom, and the second conical portion fits into the second conical surface.

[0011] By adopting the above technical solution, when the central screw is screwed into the implant, the central screw drives the second conical part to move and fit against the second conical surface. Under the action of the second conical part and the second conical surface, the central screw can push the abutment body to move closer to the implant, thereby reducing the gap between the abutment and the implant.

[0012] Preferably, the outer side wall of the base body near the end of the limiting sleeve is provided with multiple anti-rotation grooves.

[0013] By adopting the above technical solution, the anti-rotation groove limits the base body and prevents the base body from rotating, thereby facilitating the screwing of the central screw into the implant.

[0014] Preferably, the elastic groove is provided with an opening on the side away from the base body, and the side of the elastic groove close to the base body is circular.

[0015] By adopting the above technical solution, the elastic groove is opened on the side away from the base body, and the side of the elastic groove close to the base body is circular, which facilitates the outward expansion and deformation of the limiting sleeve.

[0016] Preferably, a third conical portion is formed on the outer side wall of the abutment body, and the third conical portion abuts against the implant.

[0017] By adopting the above technical solution, when the central screw is screwed into the implant, the central screw drives the abutment body to move closer to the implant, and the abutment body drives the third conical part to press against the implant, thereby further improving the connection stability between the abutment and the implant.

[0018] Preferably, the outer diameter of the limiting sleeve is smaller than the outer diameter of the bottom end of the base body.

[0019] By adopting the above technical solution, the outer diameter of the limiting sleeve is smaller than the outer diameter of the bottom end of the base body, which facilitates the outward expansion deformation of the limiting sleeve.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. Using a limiting sleeve and an elastic groove, when connecting the abutment body and the implant, first insert the abutment body into the implant, then install the central screw in the mounting hole of the abutment body. The end of the central screw passes through the limiting sleeve and connects with the implant. During the connection process, the central screw will drive the elastic groove to open, causing the limiting sleeve to expand outward and press against the implant, thereby locking the abutment body and making the connection between the abutment and the implant more stable.

[0022] 2. With the help of the first conical part and the first conical surface, when the central screw is screwed into the implant, the central screw drives the first conical part to move, and the first conical part drives the elastic groove to open through the first conical surface, thereby locking the abutment body.

[0023] 3. Through the second conical part and the second conical surface, when the central screw is screwed into the implant, the central screw drives the second conical part to move and fit against the second conical surface. Under the action of the second conical part and the second conical surface, the central screw can push the abutment body to move closer to the implant, thereby reducing the gap between the abutment and the implant. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the double-locking base structure of this application;

[0025] Figure 2 This is a partial structural cross-sectional view of the double-locking base structure of this application, to highlight the base body;

[0026] Figure 3 This is a partial structural diagram of the double-locking base structure of this application, to highlight the central screw;

[0027] Figure 4 This is a cross-sectional view of the overall structure of the double-locking base structure of this application.

[0028] Reference numerals in the attached drawings: 1. Base body; 2. Central screw; 3. Mounting hole; 4. Limiting sleeve; 5. Elastic groove; 6. First conical part; 7. First conical surface; 8. Second conical part; 9. Second conical surface; 10. Anti-rotation groove; 11. Third conical part. Detailed Implementation

[0029] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0030] This application discloses a double-locking base structure.

[0031] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4A double-locking abutment structure includes an abutment body 1 and a central screw 2. The abutment body 1 has mounting holes 3 extending through both ends. A limiting sleeve 4 is integrally formed at the bottom of the abutment body 1, and the inner hole of the limiting sleeve 4 communicates with the mounting holes 3. The central screw 2 is slidably installed within the mounting holes 3 of the abutment body 1. The bottom of the central screw 2 is a threaded end, which passes through the limiting sleeve 4 and is fixedly connected to the internal thread of the implant.

[0032] A second conical portion 8 is formed on the top of the outer wall of the central screw 2, and the diameter of the second conical portion 8 gradually decreases from top to bottom. A second conical surface 9 is formed on the mounting hole 3 of the base body 1, and the diameter of the second conical surface 9 gradually decreases from top to bottom. A plurality of anti-rotation grooves 10 are spaced apart circumferentially on the outer wall of the base body 1 near the end close to the limiting sleeve 4. A third conical portion 11 is formed on the outer wall of the base body 1, and the diameter of the third conical portion 11 gradually decreases from top to bottom.

[0033] When the threaded end of the central screw 2 is screwed into the implant, the anti-rotation groove 10 places the abutment body 1 in a rotational position. The central screw 2 drives the second conical part 8 to move and conform to the second conical surface 9. Under the action of the second conical part 8 and the second conical surface 9, the central screw 2 can push the abutment body 1 towards the implant, thereby reducing the gap between the abutment and the implant. At the same time, the abutment body 1 drives the third conical part 11 to press against the implant, thereby improving the connection stability between the abutment and the implant.

[0034] The limiting sleeve 4 has four elastic grooves 5 evenly spaced along its circumference. The bottom of the elastic grooves 5, away from the base body 1, is open, and the cross-section of the elastic groove 5 near the top of the base body 1 is circular. The outer diameter of the limiting sleeve 4 is smaller than the outer diameter of the bottom of the base body 1. A first conical portion 6 is formed on the outer wall of the central screw 2, located below the second conical portion 8, and the diameter of the first conical portion 6 gradually decreases from top to bottom. The inner wall of the limiting sleeve 4 is a first conical surface 7, and the diameter of the first conical surface 7 gradually decreases from top to bottom.

[0035] When the threaded end of the central screw 2 is screwed into the implant, the central screw 2 drives the first conical part 6 to move. The first conical part 6 drives the elastic groove 5 to open through the first conical surface 7, so that the limiting sleeve 4 expands outward. The expanded limiting sleeve 4 is in interference fit with the implant, thereby locking the abutment body 1 and making the connection between the abutment and the implant more stable.

[0036] The implementation principle of the double-locking abutment structure in this application embodiment is as follows: When connecting the abutment body 1 and the implant, the abutment body 1 is first inserted into the implant, and then the central screw 2 is installed in the mounting hole 3 of the abutment body 1. The threaded end of the central screw 2 passes through the limiting sleeve 4 and connects with the implant. When the threaded end of the central screw 2 is screwed into the implant, the central screw 2 drives the first conical part 6 to move. The first conical part 6 drives the elastic groove 5 to open through the first conical surface 7, causing the limiting sleeve 4 to expand outward. The expanded limiting sleeve 4 is interference-fitted with the implant, thereby locking the abutment body 1 and making the connection between the abutment and the implant more stable.

[0037] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A dual-lock abutment structure, characterized by: The device includes a base body (1) and a central screw (2). The end of the base body (1) is inserted into the implant. The base body (1) has an installation hole (3). The central screw (2) is slidably disposed in the installation hole (3) of the base body (1). A limiting sleeve (4) is fixedly disposed at the end of the base body (1). An elastic groove (5) is provided on the limiting sleeve (4). The end of the central screw (2) passes through the limiting sleeve (4) and is threadedly connected to the implant. The central screw (2) drives the elastic groove (5) to open and makes the limiting sleeve (4) press against the implant.

2. The dual lock abutment structure according to claim 1, wherein: A first conical portion (6) is formed on the outer wall of the central screw (2), the diameter of the first conical portion (6) gradually decreases from top to bottom, a first conical surface (7) is formed inside the limiting sleeve (4), the diameter of the first conical surface (7) gradually decreases from top to bottom, and the first conical portion (6) fits against the first conical surface (7).

3. The dual lock abutment structure according to claim 2, wherein: A second conical portion (8) is formed on the outer wall of the central screw (2), the diameter of the second conical portion (8) gradually decreases from top to bottom, a second conical surface (9) is formed inside the base body (1), the diameter of the second conical surface (9) gradually decreases from top to bottom, and the second conical portion (8) fits into the second conical surface (9).

4. The dual lock abutment structure of claim 1, wherein: Multiple anti-rotation grooves (10) are provided on the outer wall of the base body (1) near the end of the limiting sleeve (4).

5. The dual lock abutment structure according to claim 1, wherein: The elastic groove (5) is opened on the side away from the base body (1), and the side of the elastic groove (5) close to the base body (1) is circular.

6. The dual lock abutment structure according to claim 1, wherein: A third conical portion (11) is formed on the outer side wall of the abutment body (1), and the third conical portion (11) abuts against the implant.

7. The dual lock abutment structure according to claim 1, wherein: The outer diameter of the limiting sleeve (4) is smaller than the outer diameter of the bottom end of the base body (1).

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