Composite abutment of angle-variable screw channel for dental implant restoration

Abstract

The invention relates to the technical field of dental restoration tools, and discloses a composite abutment of a variable-angle screw channel for dental implant restoration, the composite abutment comprises an abutment, a lower screw rod is arranged in the abutment in a penetrating manner, a lower thread is arranged on the side wall of the bottom of the lower screw rod, and a spherical cavity is formed in the inner wall of the top of the abutment; and a screw hole ball is movably mounted in the spherical cavity. According to the dental implant, the spherical cavity is matched with the screw hole ball, so that the connection between the upper prosthesis and the lower prosthesis of the dental implant can be changed at a certain angle, and the screw hole ball can rotate in the spherical cavity within a certain angle range and cannot fall off from the spherical cavity under the expansion of the bridge screw rod on the screw hole ball; through the segmented fixing mode of the lower screw and the bridge screw, accessories of the whole device are more common, a complex structure does not need to be adopted, follow-up maintenance and replacement can be facilitated, meanwhile, the production and assembly cost of the device can be reduced, and the practicability of the device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dental prosthetic tools, in particular to a composite abutment with variable-angle screw channel for dental implant repair. BACKGROUND

[0002] In dental implant repair, the implant is usually embedded and installed in the human body, and then ACS bridge screw is used for installation and positioning. However, due to the particularity of ACS bridge screw, the ASC bridge screw channel and the thread form a certain angle, a special ASC screw and ASC screwdriver are required for assembly, and the screw channel processing is complex, which makes the cost higher, and the complexity of the processing technology also makes it difficult to operate, affecting the repair effect and efficiency of the dental implant. In view of this, we propose a composite abutment with variable-angle screw channel for dental implant repair. SUMMARY

[0003] The purpose of the present application is to provide a composite abutment with variable-angle screw channel for dental implant repair to solve the problems raised in the background art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a composite abutment with variable-angle screw channel for dental implant repair, comprising an abutment, a limiting ring is fixedly installed on the inner wall of the bottom of the abutment, a lower screw rod is arranged in the interior of the abutment, a lower thread is formed on the bottom side wall of the lower screw rod, a spherical cavity is formed on the top inner wall of the abutment, a screw hole ball is movably installed in the interior of the spherical cavity, an open slot is formed on the side wall of the screw hole ball, a threaded hole is formed at the center of the screw hole ball, a bridge screw rod is threadedly connected in the interior of the threaded hole, and an upper thread is formed on the bottom side wall of the bridge screw rod, which is matched with the threaded hole.

[0005] Preferably, the abutment is arranged in a horn shape with an open top end, so that the screw hole ball can stably rotate in the spherical cavity, and the angle of the bridge screw rod on the abutment can be adjusted.

[0006] Preferably, a perforation matched with the outer diameter of the lower screw rod is formed on the bottom of the abutment, and the inner diameter of the limiting ring is smaller than the outer diameter of the top end of the lower screw rod, so that the top end of the lower screw rod and the limiting ring can be locked together to ensure the stable connection between the bottom of the abutment and the dental implant.

[0007] Preferably, the inner diameter of the open top end of the abutment is smaller than the outer diameter of the screw hole ball, and the screw hole ball is installed in the spherical cavity by the method of pressing in.

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

[0009] Preferably, the screw hole ball comprises a fixed section and a deformed section, the deformed section is arranged at the top of the fixed section, the size of the threaded hole at the center of the fixed end of the screw hole ball is matched with the upper thread, and the inner diameter of the corresponding threaded hole at the center of the deformed section of the screw hole ball is smaller than the outer diameter of the bridge screw.

[0010] Preferably, the axial lines of the spherical cavity, the through hole and the lower screw are on the same vertical line, and the through hole is arranged through the spherical cavity, so as to ensure the vertical connection state and stability between the spherical cavity and the lower screw.

[0011] Preferably, the threaded hole is arranged with a round corner near the edge of the opening slot, so as to avoid excessive friction between the edge of the opening slot and the upper thread.

[0012] Preferably, the length of the bridge screw is greater than the depth of the threaded hole, so as to facilitate the staff to adjust the length of the bridge screw according to the actual assembly requirement.

[0013] Compared with the prior art, the present application provides a composite abutment with a variable-angle screw channel for dental implant repair, which has the following beneficial effects: 1. The composite abutment with a variable-angle screw channel for dental implant repair, by cooperation of the spherical cavity and the screw hole ball, the connection between the upper and lower repair bodies of the dental implant can be changed at a certain angle, and under the expansion of the bridge screw on the screw hole ball, the screw hole ball can rotate within a certain angle range in the spherical cavity and will not fall out of the spherical cavity, by the segmented fixation of the lower screw and the bridge screw, the entire device assembly is more common, without using a complex structure, which can facilitate subsequent maintenance and replacement, reduce the production and assembly cost of the device, and improve the practicability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is a schematic diagram of the inclined state of the screw hole ball of the present application; Figure 3 It is an overall exploded view of the present application; Figure 4 It is a sectional view of the abutment and the screw hole ball of the present application; Figure 5 It is a schematic diagram of the separation state of the abutment and the screw hole ball of the present application.

[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, the present invention provides a technical solution: a composite abutment for a variable angle screw channel for dental implant restoration, comprising an abutment 1, a limiting ring 2 fixedly installed on the bottom inner wall of the abutment 1, a lower screw 3 passing through the interior of the abutment 1, a lower thread 4 formed on the bottom side wall of the lower screw 3, a spherical cavity 5 formed on the top inner wall of the abutment 1, a screw hole ball 6 movably installed inside the spherical cavity 5, an opening groove 7 formed on the side wall of the screw hole ball 6, a threaded hole 8 formed 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 formed 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 open end of the abutment 1 is smaller than the outer diameter of the screw ball 6.

[0023] Please refer to Figure 3 When assembled, the screw ball 6 is installed by pressing into the spherical cavity 5 by a press-in method, and the open end of the abutment 1 is located above the horizontal central axis of the spherical cavity 5, so that the screw ball 6 pressed into the spherical cavity 5 will not come out of the spherical cavity 5, affecting the stability of the connection of the device, and the screw ball 6 can also rotate in the spherical cavity 5.

[0024] The number of open grooves 7 is six, and the six groups of open grooves 7 are arranged in a circumferential array on the outer surface of the screw ball 6.

[0025] The six groups of open grooves 7 divide the top of the screw ball 6 into six petals, thereby avoiding the serious local deformation of the side of the screw ball 6 after the bridge screw rod 9 is screwed in, making it difficult to maintain the movable connection between the screw ball 6 and the spherical cavity 5, and thereby affecting the service life of the entire device.

[0026] The screw ball 6 includes a fixed segment and a deformation segment, the deformation segment is arranged at the top of the fixed segment, the size of the threaded hole 8 at the center of the fixed end of the screw ball 6 is matched with the upper thread 10, and the inner diameter of the corresponding threaded hole 8 at the center of the deformation segment of the screw ball 6 is smaller than the outer diameter of the bridge screw rod 9.

[0027] The deformation segment will appear outward expansion deformation when the bridge screw rod 9 is inserted and continuously rotated downward, while ensuring the connection state between the screw ball 6 and the spherical cavity 5, the bridge screw rod 9 can maintain stable connection with the screw ball 6, to ensure the connection stability between the upper restoration body connected by the bridge screw rod 9 and the abutment 1 and the bottom restoration body.

[0028] The central axes of the spherical cavity 5, the perforation and the lower screw rod 3 are on the same vertical line, and the perforation and the spherical cavity 5 are throughly arranged.

[0029] The vertical connection state and stability between the spherical cavity 5 and the lower screw rod 3 are ensured, and the bending strength in the horizontal direction is also improved, to ensure the stability effect during the entire restoration assembly process, avoid deformation or displacement affecting the quality of the dental implant restoration.

[0030] The threaded hole 8 is arranged with a rounded corner near the edge of the open groove 7.

[0031] Even if the screw ball 6 locally deforms at the open groove 7, it will not cause motion interference or excessive friction to the downward rotation of the bridge screw rod 9, improving the smoothness of the device assembly and facilitating the operation of the staff.

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

[0033] Please refer to Figures 3-4 , the bridge screw 9 can adjust its depth of insertion into the screw hole ball 6 according to the actual assembly requirements, and then can be adjusted for different lengths of the upper restoration, improve the flexibility and adaptability of the device in the process of connecting the upper and lower restorations.

[0034] In the present application, in use, first, the lower screw 3 is threaded through the perforation in the bottom of the abutment 1, and the lower screw 4 is exposed to the abutment 1, then the lower screw 3 is screwed by screwing, so that it is connected with the lower restoration in the oral cavity, until the abutment 1, the lower screw 3 and the lower restoration keep a relatively stable state, then the screw hole ball 6 is pressed into the spherical cavity 5, and the bridge screw 9 is inserted into the threaded hole 8, and the bridge screw 9 is continuously rotated, cooperating with the screwing of the upper screw thread 10 and the threaded hole 8, so that the deformation section outside the screw hole ball 6 can be expanded under pressure, ensuring that the screw hole ball 6 and the spherical cavity 5 are connected, at the same time, the bridge screw 9 can keep stable connection with the screw hole ball 6, finally, the bridge screw 9 is connected with the upper restoration, and the assembly of the whole device is completed.

[0035] The above is a detailed description of the present application in general, but some modifications or improvements can be made on the basis of the present application, which is obvious to those skilled in the art. Therefore, the modifications or improvements without departing from the spirit of the present application are within the scope of the present application.

Claims

1. A composite abutment with variable angle screw access for dental implant restoration, comprising an abutment (1), characterized in that: The bottom inner wall of the base (1) is fixedly provided with a limiting ring (2), the inside of the base (1) is provided with a lower screw rod (3), the bottom side wall of the lower screw rod (3) is provided with a lower thread (4), the top inner wall of the base (1) is provided with a spherical cavity (5), the inside of the spherical cavity (5) is movably provided with a screw hole ball (6), the side wall of the screw hole ball (6) is provided with an opening slot (7), the center of the screw hole ball (6) is provided with a threaded hole (8), the inside of the threaded hole (8) is threadedly connected with a bridge screw rod (9), the bottom side wall of the bridge screw rod (9) is provided with an upper thread (10) matched with the threaded hole (8).

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

3. The composite abutment with variable angle screw access for dental implant restoration according to claim 1, wherein: The bottom of the base (1) is provided with a perforation matched with the outer diameter of the lower screw rod (3), and the inner diameter of the limiting ring (2) is smaller than the outer diameter of the top end of the lower screw rod (3).

4. The composite abutment with variable angle screw access for dental implant restoration according to claim 2, wherein: The inner diameter of the open top end of the base (1) is smaller than the outer diameter of the screw hole ball (6).

5. The composite abutment with variable angle screw access for dental implant restoration according to claim 1, wherein: The number of the opening slots (7) is 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 with variable angle screw access for dental implant restoration according to claim 1, wherein: The screw hole ball (6) comprises a fixed section and a deformation section, the deformation section is arranged on the top of the fixed section, the size of the threaded hole (8) at the center of the fixed end of the screw hole ball (6) is matched with the upper thread (10), and the inner diameter of the corresponding threaded hole (8) at the center of the deformation section of the screw hole ball (6) is smaller than the outer diameter of the bridge screw rod (9).

7. The composite abutment with variable angle screw access for dental implant restoration according to claim 3, wherein: The axial lines of the spherical cavity (5), the perforation and the lower screw rod (3) are on the same vertical line, and the perforation and the spherical cavity (5) are provided in a through manner.

8. The composite abutment with variable angle screw access for dental implant restoration according to claim 1, wherein: The threaded hole (8) is provided in a round corner near the edge of the opening slot (7).

9. The composite abutment of claim 1, wherein: The length of the bridge screw rod (9) is greater than the depth of the threaded hole (8).

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