Composite base bridge assembly and method of installing same

Abstract

The application discloses a composite abutment bridge assembly and a mounting method thereof, and belongs to the technical field of dental implants, which comprises an implant, a lower bolt, a lower abutment, an upper bolt, an upper abutment, a screw cap, an elastic structure, a bridge and a crown, the lower abutment is fixedly connected with the implant through the lower bolt, the upper abutment is coaxially provided with an upper large hole and an upper small hole in sequence, the upper bolt passes through the upper small hole and is threadedly connected with the lower abutment, and the screw head of the upper bolt is located in the upper large hole; the screw cap is rotationally connected with the inner wall of the upper large hole, the two ends of the elastic structure are connected with the screw head of the upper bolt and the screw cap respectively, and the upper abutment is provided with a limiting structure; when the screw cap rotates, the elastic structure accumulates elastic potential energy, the elastic potential energy of the elastic structure is applied to the screw head of the upper bolt to force the upper bolt to be screwed, and the limiting structure is used for limiting the position of the screw cap; the bridge is fixed to the upper abutment, and the crown is fixed to the upper portion of the upper abutment. The application can reduce loosening of the upper bolt, thereby improving the stability of the composite abutment.

Description

Technical Field

[0001] This application belongs to the field of dental implant technology and relates to a composite abutment bridge assembly and its installation method. Background Technology

[0002] Composite abutments are two-part abutments that work by transferring the restorative interface plane from the bone surface to the soft tissue level. They can be adapted to various superstructures, such as composite abutment bridges, which are suitable for multiple teeth or the entire dental arch.

[0003] The existing composite abutment bridge assembly includes an implant, a lower abutment, bolts, a upper abutment, a bridge, and a crown. The lower abutment is threaded to the implant, the upper abutment is fixedly connected to the lower abutment by bolts, the bridge is fixed to the upper abutment, and the crown is fixed to the upper part of the upper abutment.

[0004] However, with prolonged use, the crown and abutment are subjected to vibration forces from different directions, such as chewing and biting, which can easily cause the bolts to gradually loosen. This is especially true for abutments made of ceramic materials, which have a lower surface friction coefficient and are more prone to bolt loosening, thus reducing the stability of the abutment and cable tray installation. Summary of the Invention

[0005] To address the existing problem of loose bolts, a composite base cable tray assembly and its installation method are provided.

[0006] This application provides a composite base cable tray assembly, which is implemented using the following technical solution:

[0007] A composite abutment bridge assembly includes an implant, a lower bolt, a lower abutment, an upper bolt, an upper abutment, a cap, an elastic structure, a bridge, and a crown. The lower abutment is fixedly connected to the implant via the lower bolt. The top of the lower abutment is integrally formed with a hexagonal truncated pyramid. The bottom of the upper abutment has a mating groove that mates with the hexagonal truncated pyramid. The upper abutment has a large upper hole and a small upper hole coaxially arranged. The upper bolt passes through the small upper hole and is threadedly connected to the lower abutment. The screw head of the upper bolt is located in the large upper hole. The cap is rotatably connected to the inner wall of the large upper hole. The upper end face of the cap has a cross groove. The two ends of the elastic structure are respectively connected to the cap and the screw head of the upper bolt. The upper abutment has a limiting structure. When the cap rotates, the elastic structure accumulates elastic potential energy. The elastic potential energy of the elastic structure is applied to the screw head of the upper bolt to force the upper bolt to tighten. The limiting structure is used to limit the position of the cap. The bridge is fixed to the upper abutment, and the crown is fixed to the upper part of the upper abutment.

[0008] Through the above technical solution, by setting a cap, elastic structure and limiting structure, after the upper bolt is tightened, the tightening of the cap allows the elastic structure to accumulate elastic potential energy. The elastic potential energy is applied to the bolt head to force the upper bolt to tighten further. When the upper bolt has a tendency to loosen, the elastic potential energy is applied to the upper bolt in time to prevent the upper bolt from loosening, thereby ensuring that the upper bolt maintains sufficient preload, and thus improving the installation stability of the upper base and cable tray.

[0009] Optionally, the limiting structure includes a circular block fixed to the outer circumferential surface of the cap. A vertical groove is axially formed on the inner circumferential wall of the upper large hole. The lower end of the vertical groove is provided with a moving groove extending circumferentially along the inner circumferential wall of the upper large hole. The end of the moving groove away from the vertical groove is provided with a limiting groove extending axially away from the upper small hole. The circular block slides sequentially through the vertical groove, the moving groove, and the limiting groove. The elastic structure includes multiple elastic strips. The elastic strips extend axially along the cap. The upper end of the elastic strips is integrally formed and connected to the outer edge of the lower end face of the cap. The upper end face of the screw head of the upper bolt is provided with a slot for the lower end of the elastic strip to be inserted. The size of the slot is larger than the size of the elastic strip.

[0010] With the above technical solution, after the upper bolt is tightened, the cap is axially inserted into the upper large hole. During this process, the round block slides in the vertical groove until it is at the bottom of the groove. At this point, the lower end of the elastic strip is inserted into the slot. Then, using a screwdriver and the upper cross slot, the cap is rotated in the tightening direction of the upper bolt. The round block slides in the moving groove. During this process, the cap causes the upper end of the elastic strip to move and misalign relative to the lower end of the elastic strip. The elastic strip deforms elastically and tilts. The elastic force of the elastic strip is converted into axial and circumferential components. The circumferential force can prevent the upper bolt from loosening, ensuring that the upper bolt maintains sufficient preload. The axial force will force the bolt head to fit more closely with the inner end face of the upper large hole, increasing friction and further reducing the loosening of the upper bolt. At the same time, the reaction force of the axial force will also force the cap to move upward, causing the round block to be stuck in the limiting groove, thereby limiting the cap and ensuring that the elastic force of the elastic strip can be applied stably.

[0011] Optionally, the moving groove is wavy, and one of the crests of the moving groove, away from the vertical groove, communicates with the limiting groove.

[0012] Through the above technical solution, during the sliding process of the circular block along the moving groove, the wave-shaped moving groove will guide the circular block and the cap to move axially back and forth. During the axial back and forth movement of the cap, the elastic potential energy of the elastic strip changes in an undulating manner, and the tactile feedback of the cap's rotation is clear, thereby sensing the number of wave peaks that the cap rotates through, thus making it easier to know whether the circular block of the cap is stuck in the limiting groove, thereby improving the control accuracy of the elastic potential energy of the elastic strip.

[0013] Optionally, the elastic structure includes a spring coaxially arranged with the cap, the outer peripheral surface of the spring being in contact with the inner peripheral wall of the upper large hole, a first insert extending axially from the upper end of the spring, the first insert being inserted into the cap; and a second insert extending axially from the lower end of the spring, the second insert being inserted into the screw head of the upper bolt.

[0014] Using the above technical solution, a screwdriver is used in conjunction with the upper Phillips head to rotate the cap along the tightening direction of the upper bolt. During this process, the cap causes the upper end of the spring to move and misalign relative to the lower end of the spring. The spring undergoes elastic deformation and accumulates elastic potential energy. Then, the limiting structure limits the cap to ensure that the spring force can be applied stably. The elastic force of the spring is converted into axial force and circumferential force. The circumferential force can prevent the upper bolt from loosening, ensuring that the upper bolt maintains sufficient preload. The axial force will force the screw head of the upper bolt to fit more closely with the inner end face of the upper large hole, increasing friction and further reducing the loosening of the upper bolt.

[0015] Optionally, the limiting structure includes a first limiting ring integrally formed on the upper end face of the cap and a second limiting ring threadedly connected to the inner peripheral wall of the upper large hole. The first limiting ring is lower than the second limiting ring. The upper surface of the first limiting ring has a first wavy protrusion, and the lower surface of the second limiting ring has a second wavy protrusion that engages with the first wavy protrusion.

[0016] Through the above technical solution, by setting the first wave protrusion and the second wave protrusion to cooperate, the cap is allowed to rotate relative to the upper base. The elastic potential energy of the spring is accumulated more smoothly and stably. Under the action of the axial force of the spring, the first wave protrusion of the cap is more tightly engaged with the second wave protrusion, thereby stabilizing and limiting the cap.

[0017] Optionally, the lower abutment has a conical surface at its lower part, and the upper part of the implant has a conical hole for insertion and mating with the conical surface. The lower part of the implant has a through-hole that communicates with the conical hole. The lower abutment has a large lower hole and a small lower hole coaxially and sequentially. The lower bolt is located in the small lower hole. The lower end of the lower bolt is fixed with a hexagonal prism located in the mating hole, and the end face of the hexagonal prism abuts against the inner end face of the mating hole. The upper end of the lower bolt is threaded with a nut. The nut has a lower cross groove, and the lower end face of the nut abuts against the inner end face of the large lower hole.

[0018] The above technical solution involves tightening the nut, which presses down on the abutment, forcing the conical surface of the abutment to fit tightly with the conical hole of the implant.

[0019] Optionally, the tightening direction of the upper bolt is the same as the tightening direction of the nut; a disc spring is provided between the lower end face of the nut and the inner end face of the lower large hole; an upper one-way tooth is fixed on the lower end face of the upper bolt; and a lower one-way tooth is fixed on the upper end face of the nut, with the lower one-way tooth meshing with the upper one-way tooth.

[0020] Through the above technical solution, by setting a disc spring, a lower one-way tooth, and an upper one-way tooth, during installation, the nut is not fully tightened, the disc spring has not reached its elastic compression limit, and then during the tightening of the upper bolt, the upper one-way tooth and the lower one-way tooth initially mesh, the upper bolt will drive the nut to rotate a certain angle until the nut is fully tightened and the disc spring reaches its elastic compression limit. During the tightening of the upper bolt, the upper bolt moves down a short distance, so that the upper one-way tooth further meshes with the lower one-way tooth. That is, both the upper bolt and the nut are in a tightened state, the disc spring reaches its elastic compression limit, and the upper one-way tooth and the lower one-way tooth further mesh. Therefore, when the nut is loose, the elastic potential energy of the disc spring will be converted into a force that forces the nut to tighten through the cooperation of the lower one-way tooth and the upper one-way tooth, and the elastic potential energy of the elastic structure will also be transmitted to the lower one-way tooth and the nut through the upper bolt and the upper one-way tooth, that is, it also forces the nut to tighten, thereby achieving dual anti-loosening of the nut and the upper bolt.

[0021] Optionally, the tightening direction of the upper bolt is opposite to that of the nut; the lower end face of the upper bolt is provided with a hemispherical groove, and the upper end face of the nut is provided with a hemispherical head. The surface of the hemispherical head and the surface of the hemispherical groove are fixed together by an adhesive, and both the surface of the hemispherical head and the surface of the hemispherical groove are rough surfaces.

[0022] With the above technical solution, after installing the nut, adhesive is applied to the hemispherical groove, and the upper bolt is tightened. The lower end of the upper bolt gradually moves down, so that the surface of the hemispherical groove gradually fits against the hemispherical head. Since the adhesive is not dry, the coefficient of friction of the adhesive is low, so when the upper bolt is tightened and the hemispherical groove and hemispherical head are initially engaged, the upper bolt is difficult to loosen the nut, ensuring that the hemispherical groove and hemispherical head can be stably engaged. After the adhesive dries, the nut and upper bolt are fixed. At this time, since the tightening direction of the upper bolt is opposite to that of the nut, when the nut is loosened, it will also tighten the upper bolt, and the upper bolt will restrain the loosening of the nut, and vice versa.

[0023] Optionally, the disc spring may have a notch on either its outer or inner edge.

[0024] The above technical solution can improve the compressibility of disc springs.

[0025] This application provides a method for installing a composite base cable tray assembly, specifically implemented using the following technical solution:

[0026] A method for installing a composite abutment bridge assembly includes the following steps: implanting an implant into the alveolar bone; fixing a lower abutment to the implant using a lower screw; fixing an upper abutment with a bridge assembly to the lower abutment using an upper screw, with the hexagonal frustum engaging with the mating groove; rotating a cap along the tightening direction of the upper screw; as the cap rotates, the elastic structure accumulates elastic potential energy, which is applied to the screw head of the upper screw to force it to tighten; a limiting structure limits the position of the cap; and fixing the crown to the upper part of the upper abutment.

[0027] The beneficial effects of this application are:

[0028] 1. By setting up a cap, elastic structure and limiting structure, after the upper bolt is tightened, the tightening of the cap allows the elastic structure to accumulate elastic potential energy, and the elastic potential energy is applied to the bolt head to force the upper bolt to tighten further. When the upper bolt has a tendency to loosen, the elastic potential energy can be applied to the upper bolt in time to prevent the upper bolt from loosening, thereby ensuring that the upper bolt maintains sufficient preload, thereby improving the installation stability of the upper base and cable tray.

[0029] 2. By setting up a disc spring, lower one-way teeth, and upper one-way teeth, during installation, the nut is not fully tightened and the disc spring has not reached its elastic compression limit. Then, during the tightening of the upper bolt, the upper one-way teeth and lower one-way teeth initially mesh, and the upper bolt will drive the nut to rotate a certain angle until the nut is fully tightened and the disc spring reaches its elastic compression limit. During the tightening of the upper bolt, the upper bolt moves down a short distance, so that the upper one-way teeth further mesh with the lower one-way teeth. That is, both the upper bolt and the nut are in a tightened state, and the disc spring reaches its elastic compression limit. The upper one-way teeth and lower one-way teeth further mesh. Therefore, when the nut is loose, the elastic potential energy of the disc spring will be converted into a force that forces the nut to tighten through the cooperation of the lower one-way teeth and the upper one-way teeth. The elastic potential energy of the elastic structure will also be transmitted to the lower one-way teeth and the nut through the upper bolt and the upper one-way teeth, which also forces the nut to tighten, thereby achieving double anti-loosening of the nut and the upper bolt.

[0030] 3. As the lower end of the upper bolt gradually moves downward, the surface of the hemispherical groove gradually comes into contact with the hemispherical head. Because the adhesive is not dry, the coefficient of friction of the adhesive is low, making it difficult for the upper bolt to loosen the nut when the upper bolt is tightened and the hemispherical groove and hemispherical head are initially engaged. This ensures that the hemispherical groove and hemispherical head can be stably engaged. After the adhesive dries, the nut and upper bolt are fixed. At this time, since the tightening direction of the upper bolt is opposite to that of the nut, when the nut is loosened, it will also tighten the upper bolt, and the upper bolt will restrain the loosening of the nut. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of Example 1.

[0032] Figure 2This is a cross-sectional view of the overall structure of Embodiment 1.

[0033] Figure 3 This is a schematic diagram of Embodiment 1 illustrating the relationship between the elastic strip and the slot.

[0034] Figure 4 This is a cross-sectional view of the upper base of Embodiment 1.

[0035] Figure 5 This is a schematic diagram of Example 1 illustrating the elastic deformation of the elastic strip.

[0036] Figure 6 This is a partial schematic diagram of the upper base of Embodiment 2.

[0037] Figure 7 This is a cross-sectional view of the overall structure of Example 3.

[0038] Figure 8 yes Figure 7 A magnified view of a portion of point A in the middle.

[0039] Figure 9 This is an exploded view of Example 3, showing the relative positional state of the first wave protrusion and the second wave protrusion.

[0040] Figure 10 This is a cross-sectional view of the overall structure of Example 4.

[0041] Figure 11 This is a schematic diagram of Example 4 illustrating the meshing of the upper and lower unidirectional teeth.

[0042] Figure 12 This is a partial sectional view of Embodiment 5, used to illustrate the mating relationship between the upper bolt and nut.

[0043] Explanation of reference numerals in the attached diagram: 1. Implant; 2. Lower abutment; 3. Upper abutment; 5. Bridge; 6. Screw cap; 11. Conical hole; 12. Mating hole; 21. Conical surface; 22. Lower large hole; 23. Lower small hole; 25. Lower bolt; 251. Hexagonal prism; 252. Nut; 253. Lower cross groove; 255. Disc spring; 256. Lower one-way tooth; 257. Hemispherical head; 26. Hexagonal frustum; 31. Mating groove; 32. Upper large hole; 3 21. Vertical groove; 322. Moving groove; 323. Limiting groove; 33. Upper small hole; 35. Upper bolt; 351. Slot; 352. Upper one-way tooth; 353. Hemispherical groove; 61. Upper cross groove; 62. Round block; 63. Elastic strip; 65. Spring; 651. First insertion rod; 652. Second insertion rod; 653. First limiting ring; 655. Second limiting ring; 656. First wave protrusion; 657. Second wave protrusion. Detailed Implementation

[0044] The embodiments of this application are described in detail below, and examples of the embodiments are provided in the appendix. Figures 1-12 As shown in the image.

[0045] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Example 1

[0047] Example 1 discloses a composite base bridge assembly, such as Figure 1 , Figure 2 As shown, the composite abutment bridge assembly includes an implant 1, a lower screw 25, a lower abutment 2, an upper screw 35, an upper abutment 3, a screw cap 6, an elastic structure, a bridge 5, and a crown (not shown in the figure).

[0048] The lower abutment 2 is fixedly connected to the implant 1 by a lower bolt 25. Specifically, the lower part of the lower abutment 2 has a conical surface 21, and the upper part of the implant 1 has a conical hole 11 for insertion and mating of the conical surface 21. The lower part of the implant 1 has a through-hole 12, which communicates with the conical hole 11. The cross-section of the through-hole 12 is a regular hexagon. The lower abutment 2 has a lower large hole 22 and a lower small hole 23 coaxially arranged. The lower large hole 22 is located above the lower small hole 23, and the diameter of the lower large hole 22 is larger than the diameter of the lower small hole 23.

[0049] The lower bolt 25 is located inside the lower small hole 23. A hexagonal prism 251 is fixed to the lower end of the lower bolt 25. The hexagonal prism 251 mates with the mating hole 12, and the end face of the hexagonal prism 251 abuts against the inner end face of the mating hole 12. In order to improve the mating stability, the hexagonal prism 251 can be bonded and fixed to the mating hole 12.

[0050] The upper end of the lower bolt 25 extends into the lower large hole 22. The upper end of the lower bolt 25 is threaded with a nut 252. The nut 252 has a lower cross groove 253. The lower end face of the nut 252 abuts against the inner end face of the lower large hole 22.

[0051] like Figure 2As shown, during installation, the hexagonal prism 251 is fixed in the mating hole 12 beforehand. Then, the lower abutment 2 is inserted into the implant 1 through the mating of the conical surface 21 and the conical hole 11. Then, the nut 252 is tightened by using a screwdriver and the lower cross groove 253. The lower end face of the nut 252 abuts against the inner end face of the lower large hole 22 to more firmly fix the lower abutment 2 onto the implant 1.

[0052] The top of the lower base 2 is integrally formed with a hexagonal frustum 26, and the bottom of the upper base 3 is provided with a mating groove 31 that mates with the hexagonal frustum 26. That is, the mating groove 31 and the hexagonal frustum 26 mate with each other to prevent the upper base 3 from rotating.

[0053] The upper base 3 is fixedly connected to the cable tray 5. The upper base 3 is coaxially provided with an upper large hole 32 and an upper small hole 33. The upper large hole 32 is located above the upper small hole 33, and the diameter of the upper large hole 32 is larger than the diameter of the upper small hole 33. The upper bolt 35 is located inside the upper small hole 33, and the screw head of the upper bolt 35 is located inside the upper large hole 32. The lower end of the upper bolt 35 is threaded to the inner wall of the lower large hole 22 of the lower base 2.

[0054] After the lower base 2 is installed, the upper base 3 is inserted into the lower base 2 by the cooperation of the mating groove 31 and the hexagonal frustum 26. Then, the upper bolt 35 is tightened. The screw head of the upper bolt 35 abuts against the inner end face of the upper large hole 32 to force the upper base 3 to move down, so that the upper base 3 is more firmly fixed on the lower base 2.

[0055] like Figure 2 , Figure 3 As shown, both the cap 6 and the upper bolt 35 are made of pure titanium or titanium alloy. The upper end face of the cap 6 is provided with an upper cross groove 61. The outer circumferential surface of the cap 6 fits against the inner circumferential surface of the upper large hole 32. The two ends of the elastic structure are respectively connected to the screw heads of the cap 6 and the upper bolt 35. In this embodiment, the elastic structure includes multiple elastic strips 63. The elastic strips 63 extend along the axial direction of the cap 6. Each elastic strip 63 is evenly arranged around the circumference of the cap 6. The upper end of the elastic strip 63 is integrally formed and connected to the outer edge of the lower end face of the cap 6. The upper end face of the screw head of the upper bolt 35 is provided with a slot 351 corresponding to the elastic strip 63. The slot 351 is open and the size of the slot 351 is larger than the size of the elastic strip 63. The slot 351 is used for the lower end of the elastic strip 63 to be inserted.

[0056] like Figure 3 , Figure 4As shown, the upper base 3 is provided with a limiting structure, which is used to limit the position of the cap 6. In this embodiment, the limiting structure includes a circular block 62 fixed to the outer peripheral surface of the cap 6. A vertical groove 321 is axially opened on the inner peripheral wall of the upper large hole 32. The lower end of the vertical groove 321 is provided with a moving groove 322 extending circumferentially along the inner peripheral wall of the upper large hole 32. The end of the moving groove 322 away from the vertical groove 321 is provided with a limiting groove 323 extending axially away from the upper small hole 33.

[0057] This embodiment also discloses an installation method for a composite abutment bridge assembly, including the following steps: a hexagonal prism 251 is fixed in the mating hole 12 beforehand, an implant 1 is implanted into the alveolar bone, and then the lower abutment 2 is inserted into the implant 1 through the mating of the conical surface 21 and the conical hole 11. Then, the nut 252 is tightened by using a screwdriver and the mating of the lower cross groove 253. The lower end face of the nut 252 abuts against the inner end face of the lower large hole 22 to more firmly fix the lower abutment 2 onto the implant 1.

[0058] By engaging the groove 31 with the hexagonal frustum 26, the upper base 3 with the bridge 5 is inserted into the lower base 2. Then, the upper bolt 35 is tightened, and the head of the upper bolt 35 abuts against the inner end face of the upper large hole 32, so as to force the upper base 3 to move down, making the upper base 3 more firmly fixed on the lower base 2.

[0059] The cap 6 is axially inserted into the upper large hole 32. During insertion, the round block 62 slides within the vertical groove 321 until it is at the bottom of the groove. At this point, the lower end of the elastic strip 63 is inserted into the slot 351. Then, using a screwdriver and the upper cross-shaped groove 61, the cap 6 is rotated in the tightening direction of the upper bolt 35. The round block 62 slides into the moving groove 322. During this process, the cap 6 causes the upper end of the elastic strip 63 to move and misalign relative to the lower end of the elastic strip 63, resulting in elastic deformation of the elastic strip 63 (see...). Figure 5 (The arrow in the diagram indicates the direction of rotation of the cap 6.) The elastic strip 63 accumulates elastic potential energy, and the elastic force of the elastic strip 63 is converted into axial and circumferential components. When the upper bolt 35 has a tendency to loosen, the circumferential component can promptly prevent the upper bolt 35 from loosening and ensure that the upper bolt 35 maintains sufficient preload. The axial component will force the screw head of the upper bolt 35 to fit more closely with the inner end face of the upper large hole 32, increasing friction and further reducing the loosening of the upper bolt 35. Finally, the screwdriver moves upward. During this process, the reaction force of the axial component will also force the cap 6 to move upward, causing the round block 62 to be inserted into the limiting groove 323, thereby limiting the cap 6 and ensuring that the elastic force of the elastic strip 63 can be stably applied.

[0060] Finally, the crown is fixed to the upper part of the abutment 3, which can be done by bonding.

[0061] Example 2

[0062] The difference between Example 2 and Example 1 is that, as Figure 6 As shown, the moving groove 322 is wavy. In this embodiment, the moving groove 322 has two peaks, and one of the peaks of the moving groove 322 that is far away from the vertical groove 321 is connected to the limiting groove 323.

[0063] As the circular block 62 slides along the moving groove 322, the wave-shaped moving groove 322 guides the circular block 62 and the cap 6 to move axially back and forth. During the axial back and forth movement of the cap 6, the elastic potential energy of the elastic strip 63 fluctuates. Specifically, the torque required for the cap 6 is smaller from the trough to the crest, and larger from the crest to the trough. By sensing the change in the torque required for the cap 6, the number of crests that the cap 6 passes through can be detected, thus making it easier to know whether the circular block 62 of the cap 6 is stuck in the limiting groove 323, thereby improving the control accuracy of the elastic potential energy of the elastic strip 63.

[0064] Example 3

[0065] The difference between Example 3 and Example 1 is that, as Figure 7 , Figure 8 , Figure 9 As shown, the elastic structure includes a spring 65 coaxially arranged with the cap 6. The outer peripheral surface of the spring 65 is in contact with the inner peripheral wall of the upper large hole 32. A first insert rod 651 extends axially from the upper end of the spring 65 and is inserted into the cap 6. A second insert rod 652 extends axially from the lower end of the spring 65 and is inserted into the head of the upper bolt 35.

[0066] The limiting structure includes a first limiting ring 653 and a second limiting ring 655. The first limiting ring 653 is integrally formed on the upper end face of the cap 6, and the upper surface of the first limiting ring 653 has a first wave protrusion 656. The outer peripheral surface of the second limiting ring 655 is threadedly connected to the inner peripheral surface of the upper large hole 32. The second limiting ring 655 is higher than the first limiting ring 653, and the lower surface of the second limiting ring 655 has a second wave protrusion 657.

[0067] Install the upper base 3, and insert the upper bolt 35 and the cap 6 into the upper large hole 32 in sequence. Then, connect them by thread to install the second limiting ring 655 into the upper large hole 32. At this time, the cap 6 is located between the second limiting ring 655 and the screw head of the upper bolt 35. Under the axial elastic force of the spring 65, the first wave protrusion 656 of the first limiting ring 653 and the second wave protrusion 657 of the second limiting ring 655 engage. Then, use a screwdriver to press the cap 6 to disengage the first wave protrusion 656 from the second wave protrusion 657, and then connect them by thread. The screwdriver engages with the upper cross groove 61, and the cap 6 is rotated in the tightening direction of the upper bolt 35. The cap 6 drives the upper bolt 35 to rotate. After the upper bolt 35 is tightened, the cap 6 is rotated again. During this process, the cap 6 causes the upper end of the spring 65 to move and misalign relative to the lower end of the spring 65. The spring 65 undergoes elastic deformation and accumulates elastic potential energy. Then the cap 6 is released. Under the axial elastic force of the spring 65, the first wave protrusion 656 engages with the second wave protrusion 657 of the second limiting ring 655. The second limiting ring 655 then restricts the rotation of the cap 6.

[0068] In this way, the spring 65 accumulates a large elastic potential energy, and the elastic force of the spring 65 is converted into axial and circumferential components. The circumferential component can prevent the upper bolt 35 from loosening, ensuring that the upper bolt 35 maintains sufficient preload. The axial component will force the screw head of the upper bolt 35 to fit more closely with the inner end face of the upper large hole 32, increasing the friction and thus further reducing the loosening of the upper bolt 35.

[0069] Example 4

[0070] The difference between Example 4 and Examples 1-3 is that, as Figure 10 , Figure 11 As shown, a disc spring 255 is provided between the lower end face of the nut 252 and the inner end face of the lower large hole 22, that is, the two ends of the disc spring 255 elastically abut against the nut 252 and the inner end face of the lower large hole 22, respectively. Furthermore, in other embodiments, in order to increase the ease of elastic compression of the disc spring 255, a notch can be provided on the outer edge or inner edge of the disc spring 255.

[0071] The tightening direction of the upper bolt 35 is the same as the tightening direction of the nut 252. Figure 11 The arrows in the diagram indicate the tightening directions of the upper bolt 35 and the nut 252, respectively.

[0072] The lower end face of the upper bolt 35 is fixed with a ring of upper one-way teeth 352, and the upper end face of the nut 252 is fixed with a ring of lower one-way teeth 256. The lower one-way teeth 256 meshes with the upper one-way teeth 352. The upper one-way teeth 352 and the lower one-way teeth 256 are in the shape of a right triangle. When they mesh, the inclined surface of the upper one-way teeth 352 and the inclined surface of the lower one-way teeth 256 are in contact.

[0073] When installing the lower base 2, the nut 252 is not fully tightened, and the disc spring 255 has not reached its elastic compression limit. Then, the upper base 3 is installed. During the tightening of the upper bolt 35, the upper bolt 35 gradually moves downward, and the upper one-way tooth 352 and the lower one-way tooth 256 initially engage. During the tightening of the upper bolt 35, the nut 252 will also rotate at a certain angle until the nut 252 is fully tightened and the disc spring 255 reaches its elastic compression limit. It should be noted that during the tightening of the upper bolt 35, the upper bolt 35 continues to move downward a short distance, so that the upper one-way tooth 352 further engages with the lower one-way tooth 256. The final effect is as follows: both the upper bolt 35 and the nut 252 are in a tightened state, the disc spring 255 reaches its elastic compression limit, and the upper one-way tooth 352 and the lower one-way tooth 256 further engage.

[0074] Therefore, when the nut 252 is loose, the elastic potential energy of the disc spring 255 will be converted into a force that forces the nut 252 to tighten through the engagement of the lower one-way tooth 256 and the upper one-way tooth 352. The elastic potential energy of the elastic structure will also be transmitted to the lower one-way tooth 256 and the nut 252 through the upper bolt 35 and the upper one-way tooth 352, thus forcing the nut 252 to tighten as well, thereby achieving a double anti-loosening effect for the nut 252 and the upper bolt 35.

[0075] Example 5

[0076] The difference between Example 5 and Examples 1-3 is that, as Figure 12 As shown, the lower end face of the upper bolt 35 is provided with a hemispherical groove 353, and the upper end face of the nut 252 has a protruding hemispherical head 257. The surface of the hemispherical head 257 and the surface of the hemispherical groove 353 are fixed together by an adhesive, and both the surface of the hemispherical head 257 and the surface of the hemispherical groove 353 are rough surfaces.

[0077] The tightening direction of the upper bolt 35 is opposite to the tightening direction of the nut 252. Figure 12 The arrows in the diagram indicate the tightening directions of the upper bolt 35 and the nut 252, respectively.

[0078] When installing the base 3, first apply adhesive to the hemispherical groove 353, then tighten the upper bolt 35. The lower end of the upper bolt 35 gradually moves down, so that the surface of the hemispherical groove 353 gradually comes into contact with the hemispherical head 257. Since the adhesive is not dry, the coefficient of friction of the adhesive is low. Therefore, when the upper bolt 35 is tightened to the point that the hemispherical groove 353 and the hemispherical head 257 are initially engaged, it is difficult for the upper bolt 35 to loosen the nut 252. After the base 3 is installed, wait for the adhesive to dry, and the adhesive will fix the nut 252 and the upper bolt 35 together.

[0079] Since the tightening direction of the upper bolt 35 is opposite to that of the nut 252, when the nut 252 is loosened, it will also cause the upper bolt 35 to tighten. The upper bolt 35 then restricts the loosening of the nut 252, and vice versa.

[0080] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A composite pedestal raceway assembly, comprising: The utility model provides implant (1), lower bolt (25), lower base (2), upper bolt (35), upper base (3), screw cap (6), elastic structure, bridge (5) and dental crown, lower base (2) is fixedly connected with implant (1) through lower bolt (25), and the top of lower base (2) is integrally formed with six prism (26), and the bottom of upper base (3) is equipped with the cooperation groove (31) with six prism (26), upper base (3) is coaxial and is equipped with upper big hole (32) and upper small hole (33) in proper order, and upper bolt (35) passes through upper small hole (33) and is connected with lower base (2) threadedly, and the screw head of upper bolt (35) is located in upper big hole (32), screw cap (6) is rotatably connected with the inner wall of upper big hole (32), the upper end surface of screw cap (6) is equipped with upper cross groove (61), and the both ends of elastic structure are connected with screw cap (6) and the screw head of upper bolt (35) respectively, and upper base (3) is equipped with limiting structure, when screw cap (6) rotates, elastic structure accumulates elastic potential energy, and the elastic potential energy of elastic structure is applied to the screw head of upper bolt (35) to force upper bolt (35) to be screwed, and limiting structure is used for limiting the position of screw cap (6), bridge (5) is fixed with upper base (3), and dental crown is fixed on the upper portion of upper base (3), limiting structure includes the circular block (62) fixed on the outer circumferential surface of screw cap (6), the inner circumferential wall of upper big hole (32) is axially equipped with vertical groove (321), and the lower end of vertical groove (321) is equipped with the movement groove (322) extending along the inner circumferential wall of upper big hole (32) circumferentially, and the end of movement groove (322) away from vertical groove (321) is equipped with the axial extension limiting groove (323) away from upper small hole (33), circular block (62) sequentially slides through vertical groove (321), movement groove (322) and limiting groove (323), elastic structure includes a plurality of elastic strips (63), and elastic strips (63) extend axially along screw cap (6), and the upper end of elastic strip (63) is integrally connected with the outer edge of the lower end surface of screw cap (6), the upper end surface of the screw head of upper bolt (35) is equipped with the insertion groove (351) for the lower end of elastic strip (63), and the size of insertion groove (351) is greater than the size of elastic strip (63), the lower portion of lower base (2) is equipped with taper face (21), the upper portion of implant (1) is equipped with the taper hole (11) for the insertion cooperation of taper face (21), the lower portion of implant (1) is equipped with the cooperation hole (12) penetrating, and the cooperation hole (12) is communicated with taper hole (11), lower base (2) is coaxial and is equipped with lower big hole (22) and lower small hole (23) in proper order, lower bolt (25) is located in lower small hole (23), and the lower end of lower bolt (25) is fixed with six prism (251) in cooperation hole (12), and the end face of six prism (251) abuts to the inner end face of cooperation hole (12).The upper end of the lower bolt (25) is threadedly connected with a nut (252), the nut (252) has a lower cross groove (253), the lower end surface of the nut (252) abuts against the inner end surface of the lower large hole (22); the tightening direction of the upper bolt (35) is the same as the tightening direction of the nut (252); a disc spring (255) is arranged between the lower end surface of the nut (252) and the inner end surface of the lower large hole (22), the lower end surface of the upper bolt (35) is fixed with an upper one-way tooth (352), the upper end surface of the nut (252) is fixed with a lower one-way tooth (256), the upper one-way tooth (352) and the lower one-way tooth (256) are in the shape of a right triangle, when the lower one-way tooth (256) engages with the upper one-way tooth (352), the inclined surface of the upper one-way tooth (352) and the inclined surface of the lower one-way tooth (256) are in abutment. When installing the lower base (2), the nut (252) is not completely tightened, and the disc spring (255) is not at the elastic compression limit, during the process of tightening the upper bolt (35), the upper bolt (35) gradually moves downward, the upper one-way tooth (352) and the lower one-way tooth (256) are preliminarily engaged, the upper bolt (35) rotates during the process of tightening the upper bolt (35), until the nut (252) is completely tightened, and the disc spring (255) reaches the elastic compression limit, the upper bolt (35) continuously moves downward during the process of tightening the upper bolt (35), so that the upper one-way tooth (352) is further engaged in the lower one-way tooth (256), finally the upper bolt (35) and the nut (252) are in the state of being tightened, the disc spring (255) reaches the elastic compression limit, and the upper one-way tooth (352) and the lower one-way tooth (256) are further engaged.

2. The composite pedestal raceway assembly of claim 1, wherein, The moving groove (322) is in a wave shape, and one of the wave crests of the moving groove (322) away from the vertical groove (321) is in communication with the limiting groove (323).

3. A composite pedestal raceway assembly, comprising: The utility model provides implant (1), lower bolt (25), lower base (2), upper bolt (35), upper base (3), screw cap (6), elastic structure, bridge (5) and dental crown, lower base (2) is fixedly connected with implant (1) through lower bolt (25), and the top of lower base (2) is integrally formed with six prism (26), and the bottom of upper base (3) is equipped with the cooperation groove (31) with six prism (26), upper base (3) is coaxial and is equipped with upper big hole (32) and upper small hole (33) in proper order, and upper bolt (35) passes through upper small hole (33) and is connected with lower base (2) threadedly, and the screw head of upper bolt (35) is located in upper big hole (32), screw cap (6) is rotatably connected with the inner wall of upper big hole (32), the upper end surface of screw cap (6) is equipped with upper cross groove (61), and the both ends of elastic structure are connected with screw cap (6) and the screw head of upper bolt (35) respectively, and upper base (3) is equipped with limiting structure, when screw cap (6) rotates, elastic structure accumulates elastic potential energy, and the elastic potential energy of elastic structure is applied to the screw head of upper bolt (35) to force upper bolt (35) to be screwed, and limiting structure is used to limit the position of screw cap (6), bridge (5) is fixed with upper base (3), and dental crown is fixed on the upper portion of upper base (3), the elastic structure includes spring (65) arranged coaxially with screw cap (6), and the outer circumferential surface of spring (65) is attached to the inner circumferential wall of upper big hole (32), and the upper end of spring (65) extends axially and has first insertion rod (651), and first insertion rod (651) is connected with screw cap (6) in plug-in mode, the lower end of spring (65) extends axially and has second insertion rod (652), and second insertion rod (652) is connected with the screw head of upper bolt (35) in plug-in mode, the limiting structure includes first limiting ring (653) integrally formed on the upper end surface of screw cap (6) and second limiting ring (655) threadedly connected with the inner circumferential wall of upper big hole (32), first limiting ring (653) is lower than second limiting ring (655), the upper surface of first limiting ring (653) has first wave convex (656), and the lower surface of second limiting ring (655) has second wave convex (657) engaged with first wave convex (656), the lower portion of lower base (2) is equipped with taper face (21), the upper portion of implant (1) is equipped with taper hole (11) for the plug-in cooperation of taper face (21), the lower portion of implant (1) is equipped with cooperation hole (12) in penetration, and cooperation hole (12) is communicated with taper hole (11), lower base (2) is coaxial and is equipped with lower big hole (22) and lower small hole (23) in proper order, lower bolt (25) is located in lower small hole (23), and the lower end of lower bolt (25) is fixed with six prism (251) located in cooperation hole (12), and the end surface of six prism (251) abuts to the inner end surface of cooperation hole (12).The upper end of the lower bolt (25) is threadedly connected with a nut (252), the nut (252) has a lower cross groove (253), the lower end surface of the nut (252) abuts against the inner end surface of the lower large hole (22); the tightening direction of the upper bolt (35) is the same as the tightening direction of the nut (252); a disc spring (255) is arranged between the lower end surface of the nut (252) and the inner end surface of the lower large hole (22), the lower end surface of the upper bolt (35) is fixed with an upper one-way tooth (352), the upper end surface of the nut (252) is fixed with a lower one-way tooth (256); the upper one-way tooth (352) and the lower one-way tooth (256) are in the shape of a right triangle, when the lower one-way tooth (256) engages with the upper one-way tooth (352), the inclined surface of the upper one-way tooth (352) and the inclined surface of the lower one-way tooth (256) are in abutment. When installing the lower base (2), the nut (252) is not completely tightened, and the disc spring (255) is not at the elastic compression limit, during the process of tightening the upper bolt (35), the upper bolt (35) gradually moves downward, the upper one-way tooth (352) and the lower one-way tooth (256) are preliminarily engaged, the upper bolt (35) rotates during the process of tightening the upper bolt (35), until the nut (252) is completely tightened, and the disc spring (255) reaches the elastic compression limit, the upper bolt (35) continuously moves downward during the process of tightening the upper bolt (35), so that the upper one-way tooth (352) is further engaged in the lower one-way tooth (256), finally the upper bolt (35) and the nut (252) are in the state of being tightened, the disc spring (255) reaches the elastic compression limit, and the upper one-way tooth (352) and the lower one-way tooth (256) are further engaged.

4. The composite pedestal raceway assembly of claim 1 or 3, wherein, The outer edge or the inner edge of the disc spring (255) has a notch.

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