Anti-loosening type abutment structure

Abstract

This application discloses an anti-loosening abutment structure, relating to the field of orthopedic implant technology. It includes an abutment disposed within an implant, with a central screw slidably passing through the abutment and threadedly connected to the implant. An elastic groove is formed at the end of the central screw near the implant. An adjustable push rod is disposed within the central screw, which is used to open the elastic groove and tighten the central screw against the implant. This application uses an elastic groove. When connecting the abutment and implant, the push rod is pre-installed into the central screw, and then the abutment and implant are connected via the central screw. Subsequently, the push rod is moved and adjusted, causing the elastic groove at the end of the central screw to open. The opened central screw and implant are more tightly connected, achieving an interference fit, thereby improving the stability of the connection between the abutment and implant.

Description

Technical Field

[0001] This application relates to the field of orthopedic implant technology, and in particular to an anti-loosening abutment structure. Background Technology

[0002] Currently, the most common method for connecting and fixing implants to abutments is to use a central screw for locking. The overall stability of this connection structure largely depends on the stability of the connection between the threads of the central screw and the implant threads.

[0003] However, a significant problem exists in practical applications: the thread size of the central screw is typically relatively small. This smaller thread size makes it difficult to achieve an ideal level of stability in the connection between the central screw and the implant, resulting in relatively low connection stability. Under prolonged use or when subjected to external forces such as chewing, the overall structure of the implant and abutment is prone to loosening. Utility Model Content

[0004] To improve the stability of the connection between the abutment and the implant, this application provides an anti-loosening abutment structure.

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

[0006] An anti-loosening abutment structure includes an abutment disposed within an implant, a central screw slidably passing through the abutment and threadedly connected to the implant, an elastic groove being formed at the end of the central screw near the implant, and an adjustable push rod being disposed within the central screw, the push rod being used to drive the elastic groove to open and to press the central screw against the implant.

[0007] By adopting the above technical solution, when connecting the abutment and the implant, the top rod is first pre-installed into the central screw, and then the abutment and the implant are connected through the central screw. Subsequently, the top rod is moved and adjusted, and the top rod drives the elastic groove at the end of the central screw to open. After opening, the central screw and the implant are more tightly connected, achieving an interference fit, thereby improving the stability of the connection between the abutment and the implant.

[0008] Preferably, the end of the push rod near the implant has a conical block, the outer wall of the conical block abuts against the inner wall of the central screw, and the diameter of the conical block gradually increases in the direction away from the push rod.

[0009] By adopting the above technical solution, the push rod is adjusted in the direction away from the implant inside the central screw. The push rod drives the conical block to move in the direction away from the implant. The diameter of the conical block at the contact point with the central screw gradually increases, thereby opening the elastic groove of the central screw.

[0010] Preferably, the central screw has a tapered opening at the end near the implant, the diameter of the tapered opening gradually increases towards the implant, and the tapered block is located inside the tapered opening.

[0011] By adopting the above technical solution, the conical block slides inside the conical opening, increasing the contact area between the conical block and the inner wall of the central screw, thereby facilitating the conical block to open the elastic groove of the central screw.

[0012] Preferably, the central screw has a first internal thread, and the push rod has a first external thread, with the first external thread engaging with the first internal thread.

[0013] By adopting the above technical solution, the push rod engages with the first internal thread of the central screw through the first external thread, thereby enabling the push rod to be adjusted within the central screw.

[0014] Preferably, a groove is formed on the end face of the push rod away from the implant.

[0015] By adopting the above technical solution, inserting the screwdriver into the rotating groove can drive the top rod to rotate, thereby facilitating the adjustment of the top rod within the central screw.

[0016] Preferably, the central screw has a second external thread near the end of the implant, the second external thread engaging with the second internal thread within the implant, and the elastic groove is formed on the second external thread.

[0017] By adopting the above technical solution, when the push rod drives the elastic groove at the end of the central screw to open, the elastic groove can drive the second external thread of the central screw to open, so that the second external thread and the second internal thread are pressed together, further improving the stability of the connection.

[0018] Preferably, the elastic groove is open at one end near the implant, and the end of the elastic groove away from the implant is spherical.

[0019] By adopting the above technical solution, one end of the elastomer is open and the other end is set to be spherical, which facilitates the deformation of the central screw.

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

[0021] 1. Using the elastic groove, when connecting the abutment and the implant, the top rod is first pre-installed into the central screw, and then the abutment and implant are connected through the central screw. Then, the top rod is moved and adjusted, and the top rod drives the elastic groove at the end of the central screw to open. After opening, the central screw and implant are more tightly connected, achieving an interference fit, which can improve the stability of the connection between the abutment and implant.

[0022] 2. Using the conical block and conical opening, adjust the push rod in the direction away from the implant within the central screw. The push rod drives the conical block to move away from the implant, and the conical block slides within the conical opening, thereby opening the elastic groove of the central screw.

[0023] 3. By inserting the screwdriver into the slot, the push rod can be rotated. The push rod is engaged with the first internal thread of the central screw through the first external thread, so that the push rod can be adjusted within the central screw. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view showing the connection between the anti-loosening abutment structure and the implant in this application;

[0025] Figure 2 This is a schematic diagram of the overall structure of the anti-loosening base structure of this application;

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

[0027] Figure 4 This is a partial structural cross-sectional view of the anti-loosening base structure of this application;

[0028] Figure 5 This is a partial structural diagram of the anti-loosening base structure of this application, to highlight the top rod;

[0029] Figure 6 This is a partial structural cross-sectional view of the anti-loosening base structure of this application, to highlight the state in which the elastic groove is not stretched open;

[0030] Figure 7 This is a partial structural cross-sectional view of the anti-loosening base structure of this application, to highlight the open state of the elastic groove.

[0031] Reference numerals: 1. Abutment; 2. Central screw; 3. Elastic groove; 4. Top rod; 5. Conical block; 6. Conical opening; 7. First internal thread; 8. First external thread; 9. Rotary groove; 10. Second external thread; 11. Implant; 12. Slide groove. Detailed Implementation

[0032] The following is in conjunction with the appendix Figures 1-7 This application will be described in further detail.

[0033] This application discloses an anti-loosening base structure.

[0034] Reference Figure 1 and Figure 2A type of anti-loosening abutment structure includes an abutment 1 installed in an implant 11, a central screw 2 slidably passing through the abutment 1, and a second external thread 10 formed at the end of the central screw 2, the second external thread 10 of the central screw 2 being located outside the abutment 1.

[0035] When installing the abutment 1, first insert the central screw 2 into the abutment 1, then install the abutment 1 into the implant 11, rotate the central screw 2, and the second external thread 10 of the central screw 2 engages with the second internal thread in the implant 11, thereby fixing the abutment 1 and the implant 11 together.

[0036] Reference Figure 3 , Figure 4 and Figure 5 The central screw 2 has a groove 12 with openings at both ends. The central screw 2 is slidably mounted with a push rod 4 within the groove 12. The end of the central screw 2 located in the groove 12 away from the implant 11 has a first internal thread 7, and the end of the push rod 4 located away from the implant 11 has a first external thread 8. The first external thread 8 mates with the first internal thread 7.

[0037] A groove 9 is provided on the end face of the push rod 4 away from the implant 11, and a conical block 5 is formed on the end of the push rod 4 near the implant 11. A conical opening 6 is formed at the end of the central screw 2 located near the implant 11 in the sliding groove 12. The diameter of the conical block 5 gradually increases in the direction away from the push rod 4, and the diameter of the conical opening 6 gradually increases in the direction near the implant 11. The conical block 5 is slidably installed in the conical opening 6.

[0038] Two elastic grooves 3 are symmetrically formed on the end of the central screw 2 near the implant 11 and along the diameter of the central screw 2. The elastic grooves 3 are formed on the second external thread 10 and are connected to the conical opening 6. The elastic groove 3 is open at one end near the implant 11, and the cross-section of the elastic groove 3 away from the implant 11 is spherical.

[0039] The implementation principle of the anti-loosening abutment structure in this application embodiment is as follows: First, the top rod 4 is pre-installed into the central screw 2, the central screw 2 is inserted into the abutment 1, and then the abutment 1 is installed into the implant 11. The central screw 2 is rotated, and the second external thread 10 of the central screw 2 engages with the second internal thread inside the implant 11, thereby fixing the abutment 1 and the implant 11 together. Subsequently, the worker inserts a screwdriver into the rotating groove 9, which drives the top rod 4 to rotate. During the rotation of the top rod 4, the conical block 5 moves from the outside of the central screw 2 (refer to...). Figure 6 The screw moves into the conical opening 6. Under the action of the elastic groove 3, the second external thread 10 on the central screw 2 is opened (see reference). Figure 7This allows the second external thread 10 to be tightly pressed against the second internal thread, forming an interference fit, thereby significantly improving the stability of the connection between the abutment 1 and the implant 11.

[0040] 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 type of anti-loosening base structure, characterized in that: It includes an abutment (1) set inside the implant (11), a central screw (2) is slidably inserted inside the abutment (1), the central screw (2) is threadedly connected to the implant (11), an elastic groove (3) is opened at the end of the central screw (2) near the implant (11), and a push rod (4) is adjustablely set inside the central screw (2), the push rod (4) is used to drive the elastic groove (3) to open and make the central screw (2) press against the implant (11).

2. The anti-loosening type abutment structure according to claim 1, characterized in that: The top rod (4) has a conical block (5) formed at the end near the implant (11). The outer wall of the conical block (5) abuts against the inner wall of the central screw (2), and the diameter of the conical block (5) gradually increases in the direction away from the top rod (4).

3. The anti-loosening type abutment structure according to claim 2, characterized in that: The central screw (2) has a conical opening (6) at the end near the implant (11). The diameter of the conical opening (6) gradually increases towards the implant (11), and the conical block (5) is located inside the conical opening (6).

4. The anti-loosening type abutment structure according to claim 1, characterized in that: The central screw (2) has a first internal thread (7) and the top rod (4) has a first external thread (8), which is threadedly engaged with the first internal thread (7).

5. The anti-loosening type abutment structure according to claim 4, characterized in that: The top rod (4) has a groove (9) on its end face away from the implant (11).

6. The anti-loosening type abutment structure according to claim 1, wherein: The central screw (2) has a second external thread (10) at the end near the implant (11), and the second external thread (10) is threadedly engaged with the second internal thread inside the implant (11). The elastic groove (3) is formed on the second external thread (10).

7. The anti-loosening type abutment structure according to claim 6, characterized in that: The elastic groove (3) is open at one end near the implant (11), and the end of the elastic groove (3) away from the implant (11) is spherical.

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