A composite abutment for a variable-angle screw channel in dental implant restoration

Abstract

This utility model relates to the field of dental restoration tools and discloses a composite abutment for a variable-angle screw channel in dental implant restoration. The abutment includes a base with a lower screw threaded through its interior. The lower screw has a threaded bottom sidewall, and the top inner wall of the base has a spherical cavity. A screw-hole ball is movably installed inside the spherical cavity. Through the cooperation between the spherical cavity and the screw-hole ball, the connection between the upper and lower restorations of the dental implant can be changed at a certain angle. Furthermore, with the expansion of the screw-hole ball by the bridge screw, the screw-hole ball can rotate within a certain angle range in the spherical cavity without falling out. The segmented fixing method of the lower screw and bridge screw makes the entire device's components more common, eliminating the need for complex structures. This facilitates subsequent maintenance and replacement, reduces production and assembly costs, and improves the device's practicality.

Description

Technical Field

[0001] This utility model relates to the field of dental restoration tools, specifically a composite abutment for a variable-angle screw channel used in dental implant restoration. Background Technology

[0002] In dental implant restoration, the implant is typically inserted into the body and positioned using ACS (Advanced Scheduling and Implantation) bridge screws. However, due to the unique nature of ACS bridge screws, the screw channel and thread form a certain angle, requiring specialized ACS screws and screwdrivers for assembly. Furthermore, the complex machining of the screw channel increases costs, and the complexity of the manufacturing process also makes the procedure difficult, affecting the restoration effect and efficiency of dental implants. Therefore, we propose a composite abutment with a variable-angle screw channel for dental implant restoration. Utility Model Content

[0003] The purpose of this invention is to provide a composite abutment for a variable-angle screw channel for dental implant restoration, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a composite abutment for a variable angle screw channel in dental implant restoration, comprising an abutment, a limiting ring fixedly installed on the bottom inner wall of the abutment, a lower screw threaded through the interior of the abutment, a lower threaded section on the bottom side wall of the lower screw, a spherical cavity on the top inner wall of the abutment, a screw-hole ball movably installed inside the spherical cavity, an opening groove on the side wall of the screw-hole ball, a threaded hole at the center of the screw-hole ball, a bridge screw threadedly connected to the inside of the threaded hole, and an upper threaded section on the bottom side wall of the bridge screw that matches the threaded hole.

[0005] Preferably, the base is configured as a horn shape with an open top, so that the screw ball can rotate stably in the spherical cavity, thereby allowing the angle of the bridge screw on the base to be adjusted.

[0006] Preferably, the bottom of the abutment has a through hole that matches the outer diameter of the lower screw, and the inner diameter of the limiting ring is smaller than the outer diameter of the top of the lower screw. The top of the lower screw and the limiting ring can lock together to ensure a stable connection between the bottom of the abutment and the dental implant.

[0007] Preferably, the inner diameter of the opening at the top of the base is smaller than the outer diameter of the screw-hole ball, and the screw-hole ball is installed by pressing it into the spherical cavity during assembly.

[0008] Preferably, the number of opening slots is set to six, and the six opening slots are arranged in a circumferential array on the outer surface of the screw hole ball. After the bridge screw is screwed in, the side of the screw hole ball can be expanded outward in six parts and contact the inner surface of the spherical cavity.

[0009] Preferably, the screw ball includes a fixed section and a deformable section. The deformable section is located at the top of the fixed section. The size of the threaded hole at the center of the fixed end of the screw ball is adapted to the upper thread. The inner diameter of the threaded hole at the center of the deformable section of the screw ball is smaller than the outer diameter of the bridge screw.

[0010] Preferably, the centerlines of the spherical cavity, the perforation, and the lower screw are on the same vertical line, and the perforation is connected to the spherical cavity to ensure the vertical connection between the spherical cavity and the lower screw and the stability of the connection.

[0011] Preferably, the threaded hole is rounded near the edge of the opening groove to avoid excessive friction between the edge of the opening groove and the upper thread.

[0012] Preferably, the length of the bridge screw is greater than the depth of the threaded hole, which allows the operator to adjust the extension length of the bridge screw according to actual assembly requirements.

[0013] Compared with the prior art, this utility model provides a composite abutment for a variable angle screw channel for dental implant restoration, which has the following beneficial effects: 1. The composite abutment with variable angle screw channel for dental implant restoration, through the cooperation of the spherical cavity and the screw ball, allows the connection between the upper and lower restorations of the dental implant to change at a certain angle. Furthermore, under the expansion of the screw ball by the bridge screw, the screw ball can rotate within a certain angle range in the spherical cavity without falling out. The segmented fixing method of the lower screw and the bridge screw makes the components of the entire device more common, eliminating the need for complex structures. This facilitates subsequent maintenance and replacement, reduces the production and assembly costs of the device, and improves its practicality. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the inclined state of the screw hole ball of this utility model; Figure 3 This is an exploded view of the entire utility model; Figure 4 This is a cross-sectional view of the base and screw hole ball of this utility model; Figure 5 This is a schematic diagram showing the separation of the base and the screw hole ball of this utility model.

[0015] In the diagram: 1. Base; 2. Limiting ring; 3. Lower screw; 4. Lower thread; 5. Spherical cavity; 6. Screw hole ball; 7. Opening groove; 8. Threaded hole; 9. Bridge screw; 10. Upper thread. Detailed Implementation

[0016] like Figures 1-5 As shown, this utility model provides a technical solution: a composite abutment for a variable angle screw channel for dental implant restoration, including abutment 1, a limiting ring 2 fixedly installed on the bottom inner wall of abutment 1, a lower screw 3 passing through the inside of abutment 1, a lower thread 4 opened on the bottom side wall of the lower screw 3, a spherical cavity 5 opened on the top inner wall of abutment 1, a screw hole ball 6 movably installed inside the spherical cavity 5, an opening groove 7 opened on the side wall of the screw hole ball 6, a threaded hole 8 opened at the center of the screw hole ball 6, a bridge screw 9 threadedly connected inside the threaded hole 8, and an upper thread 10 adapted to the threaded hole 8 opened on the bottom side wall of the bridge screw 9.

[0017] Specifically, the bottom outer surface of the abutment 1 is provided with a gripping surface, and there are multiple sets of gripping surfaces. These multiple sets of gripping surfaces are evenly arranged in a circumferential array on the bottom side wall of the abutment 1. This makes it convenient for workers to grip the gripping surface during assembly and disassembly, ensuring the relative stability of the abutment 1 during assembly. Furthermore, during actual assembly, the lower screw 3 is first passed through the bottom of the abutment 1, and then the lower thread 4 is exposed. At the same time, the interior of the dental implant has a threaded cavity that matches the lower thread 4, so that after tightening with the lower screw 3, the abutment 1 is positioned inside the dental implant, maintaining the stable installation of the entire abutment 1 structure.

[0018] The base 1 is configured as a horn shape with an open top.

[0019] The abutment 1 is wider at the top and narrower at the bottom. Through the open design at the top of the abutment 1, the screw ball 6 can rotate stably in the spherical cavity 5, thereby realizing the adjustment of the angle of the bridge screw 9 on the abutment 1, so as to achieve an angled connection between the upper restoration and the abutment 1, which is more suitable for the shape of the oral cavity and improves the adaptability of the product.

[0020] The bottom of the base 1 has a through hole that matches the outer diameter of the lower screw 3, and the inner diameter of the limiting ring 2 is smaller than the outer diameter of the top end of the lower screw 3.

[0021] By using the perforation, during device assembly, the lower screw 3 is first passed through the perforation and the limiting ring 2 until the lower thread 4 is fully extended from the bottom of the base 1. At this point, the top connection of the lower screw 3 is blocked by the limiting ring 2 and will not continue to move downward. As the lower screw 3 continues to rotate, the top of the lower screw 3 and the limiting ring 2 are locked together, ensuring the stability of the connection between the bottom of the base 1 and the dental implant. The limiting ring 2 can also ensure the connection between the lower screw 3 and the base 1, while ensuring that the lower screw 3 will not detach from the inside of the base 1.

[0022] The inner diameter of the opening at the top of the base 1 is smaller than the outer diameter of the screw hole ball 6.

[0023] Please see Figure 3 During assembly, the screw ball 6 is pressed into the spherical cavity 5 by a press-fit method. The opening at the top of the base 1 is located above the horizontal central axis of the spherical cavity 5. Therefore, the screw ball 6 pressed into the spherical cavity 5 will not detach from the spherical cavity 5, thus affecting the connection stability of the device. At the same time, the screw ball 6 can also rotate within the spherical cavity 5.

[0024] There are six sets of opening slots 7, and the six sets of opening slots 7 are arranged in a circumferential array on the outer surface of the screw hole ball 6.

[0025] The six sets of open slots 7 divide the top of the screw hole ball 6 into six segments, thereby preventing severe local deformation of the side of the screw hole ball 6 after the bridge screw 9 is screwed in, making it difficult to maintain the movable connection with the spherical cavity 5, and thus affecting the service life of the entire device.

[0026] The screw ball 6 includes a fixed section and a deformable section. The deformable section is located on top of the fixed section. The size of the threaded hole 8 at the center of the fixed end of the screw ball 6 is adapted to the upper thread 10. The inner diameter of the threaded hole 8 at the center of the deformable section of the screw ball 6 is smaller than the outer diameter of the bridge screw 9.

[0027] When the bridge screw 9 is inserted and continues to rotate downward, the deformation segment will exhibit outward expansion deformation. While ensuring the connection between the screw hole ball 6 and the spherical cavity 5, the bridge screw 9 can maintain a stable connection with the screw hole ball 6, so as to ensure the connection stability between the upper restoration body connected by the bridge screw 9 and the abutment 1 and the bottom restoration body.

[0028] The centerlines of the spherical cavity 5, the perforation and the lower screw 3 are on the same vertical line, and the perforation is connected to the spherical cavity 5.

[0029] This ensures the vertical connection and stability between the spherical cavity 5 and the lower screw 3, while also improving its horizontal bending strength. This guarantees the stability of the entire restoration during assembly and use, preventing deformation or displacement that could affect the quality of dental implant restoration.

[0030] The threaded hole 8 is rounded at the edge of the opening groove 7.

[0031] Even if the threaded ball 6 is partially deformed at the opening slot 7, the threaded hole 8 will not cause motion interference or excessive friction to the downward rotation of the bridge screw 9, thus improving the smoothness of the device assembly and facilitating operation by the staff.

[0032] The length of the bridge screw 9 is greater than the depth of the threaded hole 8.

[0033] Please see Figures 3-4 The bridge screw 9 can be adjusted to the depth of its insertion into the screw hole ball 6 according to actual assembly requirements, thereby allowing for adjustment of upper repair bodies of different lengths, improving the flexibility and adaptability of the device in the process of connecting upper and lower repair bodies.

[0034] In this invention, during use, the lower screw 3 is first passed through the hole at the bottom of the base 1, so that the lower thread 4 protrudes from the base 1. Then, the lower screw 3 is tightened with a screw to connect it to the lower prosthesis in the oral cavity until the base 1, the lower screw 3, and the lower prosthesis are in a relatively stable state. Then, the screw ball 6 is pressed into the spherical cavity 5, and the bridge screw 9 is inserted into the threaded hole 8. The bridge screw 9 is continuously rotated, and with the tightening of the upper thread 10 and the threaded hole 8, the deformable section on the outside of the screw ball 6 can be compressed and expanded outward. This ensures the connection between the screw ball 6 and the spherical cavity 5, while the bridge screw 9 can maintain a stable connection with the screw ball 6. Finally, the bridge screw 9 is connected to the upper prosthesis to complete the assembly of the entire device.

[0035] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A composite abutment with variable angle screw access for dental implant restoration, comprising an abutment (1), characterized in that: A limiting ring (2) is fixedly installed on the bottom inner wall of the base (1). A lower screw (3) is inserted inside the base (1). A lower thread (4) is opened on the bottom side wall of the lower screw (3). A spherical cavity (5) is opened on the top inner wall of the base (1). A screw ball (6) is movably installed inside the spherical cavity (5). An opening groove (7) is opened on the side wall of the screw ball (6). A threaded hole (8) is opened at the center of the screw ball (6). A bridge screw (9) is threaded inside the threaded hole (8). An upper thread (10) is opened on the bottom side wall of the bridge screw (9) to match the threaded hole (8).

2. The composite abutment for a variable-angle screw channel for dental implant restoration according to claim 1, characterized in that: The base (1) is configured as a horn shape with an open top.

3. The composite abutment for a variable-angle screw channel for dental implant restoration according to claim 1, characterized in that: The base (1) has a through hole at the bottom that matches the outer diameter of the lower screw (3), and the inner diameter of the limiting ring (2) is smaller than the outer diameter of the top end of the lower screw (3).

4. The composite abutment for a variable-angle screw channel for dental implant restoration according to claim 2, characterized in that: The inner diameter of the opening at the top of the base (1) is smaller than the outer diameter of the screw hole ball (6).

5. The composite abutment for a variable-angle screw channel for dental implant restoration according to claim 1, characterized in that: The number of opening slots (7) is set to six, and the six opening slots (7) are arranged in a circumferential array on the outer surface of the screw hole ball (6).

6. The composite abutment for a variable-angle screw channel for dental implant restoration according to claim 1, characterized in that: The screw ball (6) includes a fixed section and a deformable section. The deformable section is located on top of the fixed section. The size of the threaded hole (8) at the center of the fixed end of the screw ball (6) is adapted to the upper thread (10). The inner diameter of the threaded hole (8) at the center of the deformable section of the screw ball (6) is smaller than the outer diameter of the bridge screw (9).

7. The composite abutment for a variable-angle screw channel for dental implant restoration according to claim 3, characterized in that: The axial lines of the spherical cavity (5), the perforation and the lower screw (3) are on the same vertical line, and the perforation is connected to the spherical cavity (5).

8. The composite abutment for a variable-angle screw channel for dental implant restoration according to claim 1, characterized in that: The threaded hole (8) is rounded at the edge of the opening groove (7).

9. The composite abutment for a variable-angle screw channel for dental implant restoration according to claim 1, characterized in that: The length of the bridge screw (9) is greater than the depth of the threaded hole (8).

Images