False tooth and installation method thereof

Abstract

The invention relates to the technical field of biomedical treatment, and provides a false tooth and a mounting method thereof.The false tooth comprises an implant, an abutment and a dental crown, and a mounting groove is formed in one end of the implant; the abutment comprises a base plate, a fixing frame and a top seat, and the base plate abuts against and is rotationally arranged on the implant; the fixing frame is arranged in the long-strip hole in a penetrating manner, one end of the fixing frame is detachably fixed in the mounting groove, and the other end of the fixing frame is fixed to the side, away from the implant, of the base plate in an abutting manner; the top seat is detachably fixed on the chassis; and the dental crown is fixedly arranged on the top seat. The base plate is rotatably arranged on the implant in an abutting mode, the base plate and the implant are fixed through the fixing frame, the top base and the base plate are detachably and fixedly connected, the implantation angle of the top base can be conveniently adjusted, the longitudinal occupied space of the abutment can be reduced, and therefore the false tooth can be suitable for installation working conditions of different angles; and the overall performance of the false tooth can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of biomedical technology, and in particular to a denture and a method for installing the same. Background Art

[0002] Dentures, also known as false teeth, are artificial teeth that replace a certain number or all missing natural teeth. They imitate the shape and function of natural teeth to achieve the effects of chewing, biting and aesthetics. Dental implants are the most widely used and best overall dentures. In the clinical operation of dental implants, in order to ensure the stability and long-term effect of the implant, the implantation angle will be adjusted according to the specific situation.

[0003] The invention with publication number CN117500453A discloses an omnidirectional multi-unit abutment system for threaded dental prostheses, wherein the multi-unit abutment has a threaded base column and a ball portion for attachment to an implant, a rotating shell surrounds the ball and can be fixed in place with a locking screw, a driving feature on the ball allows a tool to pass through the locking screw to drive the base column into the implant, and the multi-unit assembly is in a linear configuration, and the rotating shell can be positioned and fixed at a desired inclination and azimuth. When the prosthesis is positioned on the implant abutment, the locking screw can still be accessed through the hole in the top cover. The invention discloses different embodiments for capturing the rotating shell on the ball, and describes a method for improving the passive alignment of the prosthesis with the implant.

[0004] In the above technical solution, in order to adjust the implantation angle of the abutment base, a spherical part is provided on the abutment base, and a rotating mounting part, a rotating base and a locking screw are provided. However, the rotating structure of the rotating mounting part, the rotating base and the spherical part and the locking structure of the locking screw will occupy a large longitudinal space, resulting in an excessively large gap between the prosthesis and the gums, which is not conducive to ensuring good oral function. Summary of the invention

[0005] In view of this, the present invention proposes a denture and an installation method thereof, which can reduce the longitudinal space occupied by the base while ensuring the implantation angle of the implant, thereby helping to improve the overall performance of the denture.

[0006] The technical solution of the present invention is implemented as follows: On the one hand, the present invention provides a denture, including an implant, an abutment and a crown, wherein:

[0007] One end of the implant is provided with a mounting groove;

[0008] The base comprises a bottom plate, a fixing frame and a top seat. The bottom plate is arranged on the implant in a rotatable manner and has a long hole in the interior. The fixing frame is arranged in the long hole and has one end detachably fixed in the mounting groove and the other end is fixed against the side of the bottom plate away from the implant. The top seat is detachably fixed on the bottom plate.

[0009] The dental crown is fixedly arranged on the top seat.

[0010] On the basis of the above technical solution, preferably, an implant thread is provided on the outer side of the implant, and the implant is connected to the alveolar bone through the implant thread;

[0011] The fixing frame is connected to the mounting groove by threaded fitting;

[0012] The top seat is connected to the bottom plate by threaded fitting, the top seat is connected to the crown by bonding, and the center lines of the top seat, the fixing frame and the implant do not overlap with each other.

[0013] More preferably, the center line of the implant is inclined with respect to the center line of the fixing frame, and when the top seat is rotated, the center line of the top seat can be parallel to and spaced from the center line of the implant or the fixing frame.

[0014] On the basis of the above technical solution, preferably, a matching groove is provided at the end of the implant, and the inner wall of the matching groove is spherical;

[0015] A cavity is formed on a side of the bottom plate away from the implant, an inner wall of the cavity and a side of the bottom plate close to the implant are both spherical, and the top seat blocks the cavity.

[0016] More preferably, a connecting hole is provided in the fixing frame, and two ends of the connecting hole are respectively connected to the mounting groove and the containing cavity.

[0017] More preferably, the cavity is provided with an internal thread, the top seat is provided with an external thread, and the internal thread and the external thread are cooperatively connected;

[0018] The pitch of the internal thread is equal to the pitch of the external thread, the width of the thread groove of the internal thread is smaller than the width of the thread groove of the external thread, and the cavity, the connecting hole and the mounting groove are all filled with elastic material.

[0019] More preferably, the fixing frame includes a screw rod, a screw head and a supporting block, wherein:

[0020] The screw rod is connected in the installation groove by threaded fitting and passes through the elongated hole;

[0021] The screw head is fixedly arranged at one end of the screw rod away from the mounting groove;

[0022] The abutment block is sleeved on the screw rod and is arranged between the screw head and the bottom plate, and one end of the abutment block close to the bottom plate is spherical.

[0023] More preferably, the implant thread comprises a first thread and a second thread, wherein:

[0024] The first thread is located at an end of the implant away from the tooth crown, and the width of the thread groove of the first thread gradually decreases along the direction from the implant to the tooth crown;

[0025] The second thread is located at one end of the implant close to the tooth crown, and the pitch of the second thread is smaller than the pitch of the first thread.

[0026] More preferably, the outer side of the implant is provided with a spiral groove and a straight groove, wherein:

[0027] The spiral groove is connected to the first thread, the spiral direction of the spiral groove is opposite to the spiral direction of the first thread, the pitch of the spiral groove is greater than the pitch of the first thread, and the cross section of the spiral groove is V-shaped;

[0028] The straight groove is connected to the second thread, a side wall in the straight groove is perpendicular to the peripheral side of the implant located at the straight groove, and the inner diameter of the straight groove increases first and then decreases along the axial direction of the implant.

[0029] In a second aspect, the present invention provides a method for installing a denture, comprising the following steps:

[0030] S1, cut the gums and create a hole in the alveolar bone that matches the implant;

[0031] S2, screwing the implant into the hole and suturing the gums;

[0032] S3, after the implant is combined with the alveolar bone, the installation slot is exposed, the chassis is placed in the matching slot, and the fixing frame is screwed into the installation slot through the long hole;

[0033] S4, adjusting the position of the base plate so that the side away from the implant is flush with the gums, and then tightening the fixing frame;

[0034] S5, injecting elastic material into the connecting hole, and allowing the elastic material to fill the installation groove, the connecting hole and the cavity;

[0035] S6, fix the top seat on the bottom plate, make the top seat abut against the elastic material in the cavity, and fix the crown on the top seat.

[0036] The denture and the installation method thereof of the present invention have the following beneficial effects compared with the prior art:

[0037] (1) By rotating and abutting the bottom plate on the implant, fixing the bottom plate and the implant with a fixing frame, and making the top seat and the bottom plate detachably fixedly connected, not only the implantation angle of the top seat can be adjusted conveniently, but also the longitudinal space occupied by the base can be reduced, so that the denture can be applied to installation conditions of different angles and help to ensure the overall performance of the denture;

[0038] (2) By providing an implant thread for connecting with the alveolar bone on the outer side of the implant, and connecting the fixing frame and the mounting groove as well as the top seat and the bottom plate through threaded matching, the installation convenience of the denture is improved. By making the center lines of the implant, the fixing frame and the base not coincide with each other, it is possible to avoid the rotation of one component causing the rotation of another component, thereby ensuring the installation accuracy of the denture;

[0039] (3) By setting a connecting hole on the fixing frame, the accumulated liquid in the installation groove can be discharged. By filling the cavity with elastic material and limiting the groove width of the external thread and the internal thread, the top seat can have a buffering property, thereby improving the performance of the denture. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A cross-sectional view of a denture and a method for installing the same according to the present invention;

[0042] Figure 2 A three-dimensional diagram of a denture and a method for installing the same according to the present invention;

[0043] Figure 3 A cross-sectional view of a base in a denture and a method for installing the same according to the present invention;

[0044] Figure 4 A cross-sectional view of a mounting groove in a denture and a mounting method thereof of the present invention;

[0045] Figure 5A cross-sectional view of a denture and a method for installing the same according to the present invention at a mounting groove when the denture is in a state of being filled with elastic material;

[0046] Figure 6 An exploded view of a top seat of a denture and a method for installing the same according to the present invention;

[0047] Figure 7 A cross-sectional view of the internal and external threads of a denture and a method for installing the same according to the present invention;

[0048] Figure 8 A three-dimensional diagram of a base plate of a denture and a method for installing the same according to the present invention;

[0049] Fig. 9 An exploded view of a base in a denture and a method for installing the same according to the present invention;

[0050] Fig.10 A three-dimensional diagram of an implant in a denture and a method for installing the same according to the present invention;

[0051] Fig.11 A three-dimensional diagram of a straight groove in a denture and an installation method thereof of the present invention;

[0052] Fig.12 It is a three-dimensional diagram of a top seat in a denture and an installation method thereof according to the present invention.

[0053] Among them: 1. implant; 101. mounting groove; 102. implant thread; 1021. first thread; 1022. second thread; 103. matching groove; 104. spiral groove; 105. straight groove; 2. base; 21. chassis; 22. fixing frame; 221. screw; 222. screw head; 223. supporting block; 23. top seat; 201. long hole; 202. cavity; 203. connecting hole; 204. internal thread; 205. external thread; 3. crown. DETAILED DESCRIPTION

[0054] The following will be combined with the specific implementation of the present invention to clearly and completely describe the technical solution in the present invention. Obviously, the described implementation is only a part of the implementation of the present invention, not all of the implementation. Based on the implementation of the present invention, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] like Figure 1-12 As shown, a denture of the present invention comprises an implant 1, a base 2 and a crown 3.

[0056] The crown 3 is a prosthesis that replaces the patient's original teeth. The base 2 is used to connect the implant 1 and the crown 3 in the alveolar bone. The base 2 includes a base 21, a fixing frame 22 and a top seat 23. The base 21 is abutted against and rotatably arranged on the implant 1. Its rotation method includes not only the rotation of the base 21 around its own axis, but also the rotation of the base 21 around other axes. At this time, the base 21 will slide relative to the implant 1. The top seat 23 is fixed on the base 21, and the crown 3 is fixed on the top seat 23. By utilizing the rotational connection between the base 21 and the implant 1, the angle between the crown 3 and the implant 1 can be adjusted so that the base 21 is always flush with the gums, thereby making the present denture adaptable to different implantation angles.

[0057] An elongated hole 201 is provided inside the chassis 21, and an installation groove 101 is provided at one end of the implant 1. A fixing frame 22 is arranged through the elongated hole 201, and one end of the fixing frame 22 is detachably fixed in the installation groove 101, and the other end of the fixing frame 22 is abutted and fixed to the side of the chassis 21 away from the implant 1. The present denture fixes the chassis 21 between the fixing frame 22 and the implant 1, and allows the fixing frame 22 to pass through the chassis 21, which greatly reduces the longitudinal space occupied by the base 2, thereby helping to improve and ensure the comprehensive performance of the denture; since the cross-section of the elongated hole 201 is oblong, the fixing frame 22 can be slidably arranged in the elongated hole 201, thereby preventing the fixing frame 22 from affecting the sliding of the chassis 21; at the same time, it is preferred that the top seat 23 is detachably fixedly connected to the chassis 21, so that the fixing frame 22 can be conveniently tightened or loosened.

[0058] In order to ensure the connection strength of each component and improve the connection convenience of each component, it is preferred to set an implant thread 102 on the outside of the implant 1, so that the implant 1 can be threadedly connected with the alveolar bone through the implant thread 102; similarly, the fixing frame 22 and the mounting groove 101 can also be connected through threaded connection, and the top seat 23 and the bottom plate 21 can also be connected through threaded connection; and in order to achieve rapid fixation of the crown 3, it is preferred that the top seat 23 and the crown 3 are connected by bonding; in order to avoid relative rotation between the crown 3 and the top seat 23, such as Fig.12 As shown, the position on the top seat 23 connected to the crown 3 is preferably set to be elliptical.

[0059] The implant 1, the fixing frame 22 and the top seat 23 are all connected by threaded fitting. When one of the three is rotated, the other two will be driven to rotate to a certain extent, resulting in the installation strength performance of the denture being affected. For this reason, the center lines of the top seat 23, the fixing frame 22 and the implant 1 are not overlapped with each other, so as to avoid mutual interference between the rotational connections of the implant 1, the fixing frame 22 and the top seat 23.

[0060] Specifically, the center line of the implant 1 is inclined with respect to the center line of the fixing frame 22, that is, the center line of the mounting groove 101 is inclined with respect to the center line of the implant 1, such as Figure 2 and Figure 3 As shown, no matter at what angle the implant 1 is installed on the alveolar bone, the rotation of the fixing frame 22 will not cause the implant 1 to rotate, thereby preventing the installation operation of the fixing frame 22 from causing the implant 1 to rotate, thereby ensuring the installation effect of the implant 1.

[0061] like Figure 3 As shown, when the implant 1 is installed in the alveolar bone at an angle, the center line of the top seat 23 is inclined to the center line of the implant 1 and the center line of the fixing frame 22, and the rotation of the top seat 23 will not drive the implant 1 and the fixing frame 22 to rotate. Figure 2 As shown, since the chassis 21 can rotate relative to the implant 1, the center line of the top seat 23 can be parallel to the center line of the implant 1 or the center line of the fixing frame 22. In this case, in order to prevent the rotation of the top seat 23 from driving the other two components to rotate, the top seat 23 should be eccentrically arranged with respect to the chassis 21. When the top seat 23 is rotated so that the center line of the top seat 23 is parallel to the center line of the implant 1 or the fixing frame 22, the center line of the top seat 23 and the center line of the implant 1 or the fixing frame 22 are spaced apart from each other and cannot overlap.

[0062] like Figure 4 and Fig. 9 As shown, a matching groove 103 is formed at the end of the implant 1, and the inner wall of the matching groove 103 is spherical; Figure 3 and Figure 8 As shown, the side of the chassis 21 close to the implant 1 is spherical, so that the chassis 21 can rotate or slide smoothly on the implant 1; a cavity 202 is provided on the side of the chassis 21 away from the implant 1, and the inner wall of the cavity 202 is also spherical, so that the fixing frame 22 can better support the chassis 21; at the same time, the top seat 23 blocks the cavity 202, which can avoid the problem of corrosion of the fixing frame 22 caused by saliva in the patient's mouth entering the cavity 202, thereby increasing the service life of the base 2.

[0063] When the fixing frame 22 is screwed into the mounting groove 101, there will not only be an air cavity between the two to support the fixing frame 22, which will hinder the operation of screwing the fixing frame 22 into the mounting groove 101, but also saliva will accumulate in the mounting groove 101, causing the saliva to corrode the base 2 and reduce the service life of the base 2. To solve this problem, a connecting hole 203 is provided in the fixing frame 22, such as Figure 3As shown, both ends of the connecting hole 203 are respectively connected with the mounting groove 101 and the cavity 202. When the fixing frame 22 is installed in the mounting groove 101, the interior of the mounting groove 101 is still connected with the outside, so that no air cavity that hinders the fixing frame 22 from being screwed in is generated between the fixing frame 22 and the implant 1. At the same time, if saliva accumulates in the mounting groove 101, a straw can be inserted into the connecting hole 203 to suck out the saliva, so as to ensure the service life of the base 2.

[0064] When discharging the saliva in the mounting groove 101, the above suction operation is relatively complicated. The saliva in the mounting groove 101 can also be discharged by filling the mounting groove 101 with materials. The specific operation is: select a filling material with a high density and insoluble in saliva, and inject the filling material into the connecting hole 203 along the connecting hole 203, so that the saliva with a lower density can be lifted into the cavity 202 so as to be discharged from the base 2.

[0065] like Figure 6 As shown, the cavity 202 is provided with an internal thread 204, and the top seat 23 is provided with an external thread 205, and the pitch of the internal thread 204 is equal to the pitch of the external thread 205, so that the internal thread 204 and the external thread 205 are matched and connected to achieve the connection and fixation between the bottom plate 21 and the top seat 23.

[0066] like Figure 7 As shown, the width of the thread groove of the internal thread 204 is smaller than the width of the thread groove of the external thread 205. Since the pitches of the two threads are equal, the tooth width of the external thread 205 is smaller than the width of the thread groove of the internal thread 204, and the tooth width of the internal thread 204 is smaller than the width of the thread groove of the external thread 205. When the top seat 23 is screwed into the chassis 21, the top seat 23 can reciprocate in a very small range along its axial direction, such as Figure 5 As shown, at this time, elastic material is filled in the cavity 202, the connecting hole 203 and the mounting groove 101. When the top seat 23 is installed on the bottom plate 21, the elastic material supports the side of the top seat 23 close to the bottom plate 21. Since the elastic material is elastic, the top seat 23 can move elastically. In summary, the filling of the elastic material can not only provide good support for the top seat 23, reduce the stress concentration of the crown 3 and the top seat 23 when subjected to force, but also achieve a good buffering effect.

[0067] The elastic material may be polytetrafluoroethylene, silicone and the like, which are not only elastic but also have good biocompatibility, thereby achieving the technical effect of the present invention.

[0068] like Fig. 9As shown, the fixing frame 22 includes a screw rod 221, a screw head 222 and a support block 223. The screw rod 221 is connected to the mounting groove 101 through threaded cooperation and passes through the long hole 201. The screw head 222 is fixedly arranged at one end of the screw rod 221 away from the mounting groove 101. The screw head 222 is preferably a hexagonal structure to facilitate the mutual cooperation of tools. The support block 223 is sleeved on the screw rod 221 and is arranged between the screw head 222 and the chassis 21. The support block 223 The end close to the chassis 21 is spherical, which can increase the contact area between the supporting block 223 and the inner wall of the chassis 21, and provide a certain protection for the chassis 21. At the same time, when the screw 221 is rotated, the supporting block 223 does not rotate with the chassis 21. This structure replaces the original rotation of the fixing frame 22 and the chassis 21 with the rotation of the screw 221, the screw head 222 and the supporting block 223, which is beneficial to reduce the wear of the supporting block 223, thereby ensuring the overall life of the base 2.

[0069] like Figure 2 and Fig.10 As shown, the implant thread 102 includes a first thread 1021 and a second thread 1022. The first thread 1021 is located at the end of the implant 1 away from the crown 3. The width of the thread groove of the first thread 1021 gradually decreases along the direction from the implant 1 to the crown 3, so that the tooth width of the first thread 1021 becomes larger and larger along the direction from the implant 1 to the crown 3, thereby allowing the implant 1 to drill into the alveolar bone more easily and ensuring the firmness of the fixation between the implant 1 and the alveolar bone to prevent it from loosening.

[0070] The second thread 1022 is located at one end of the implant 1 close to the crown 3. The second thread 1022 is continuously arranged with the first thread 1021, and the pitch of the second thread 1022 is smaller than the pitch of the first thread 1021, so that the traces of the teeth of the second thread 1022 and the teeth of the first thread 1021 on the alveolar bone are staggered, thereby ensuring the firmness of fixation of the implant 1 to the alveolar bone.

[0071] The outer side of the implant 1 is provided with a spiral groove 104 and a straight groove 105. Figure 1 and Fig.10 As shown, the spiral groove 104 is connected with the first thread 1021, thereby reducing the contact area between the implant 1 and the side wall of the alveolar bone hole, making it easier for the implant 1 to drill into the alveolar bone, and the spiral direction of the spiral groove 104 is opposite to the spiral direction of the first thread 1021, and the pitch of the spiral groove 104 is greater than the pitch of the first thread 1021. When the implant 1 is screwed into the alveolar bone, the bone powder can be pressed into the bottom of the installation groove 101 along the spiral groove 104, which can not only prevent the bone powder from scattering in the oral cavity, but also improve the fixation of the implant 1 to the alveolar bone; the cross-section of the spiral groove 104 is V-shaped, so that the bone powder can be guided to the peripheral side of the implant 1.

[0072] The straight groove 105 is connected to the second thread 1022. When the implant 1 is drilled into the alveolar bone, the side of the straight groove 105 located behind the rotation direction of the implant 1 is perpendicular to the circumferential side of the implant 1 at the position of the straight groove 105, and the inner diameter of the straight groove 105 first increases and then decreases along the axial direction of the implant 1. Therefore, when the implant 1 is drilled into the alveolar bone, bone powder can be more easily accumulated in the straight groove 105, and the bone powder in the straight groove 105 is used to hinder the reverse rotation of the implant 1, thereby preventing the implant 1 from loosening.

[0073] The method of using a method for installing a denture of the present invention is as follows:

[0074] S1, after the patient's local anesthesia takes effect, use a surgical blade to cut the patient's gums, then use a dental drill to open a hole in the alveolar bone that matches the pre-selected implant 1. The diameter of the hole is 3.5-6mm, depending on the type of implant 1 and the patient's bone density. The depth of the hole is 3-3.5mm and exceeds the length of implant 1 to ensure that implant 1 can be fully embedded in the bone tissue.

[0075] S2, slowly screw the pre-selected implant 1 into the previously opened hole until the implant 1 is flush with the surface of the alveolar bone, and then use absorbable sutures to suture the gums to promote healing and reduce the risk of infection.

[0076] S3, wait for the implant 1 to combine with the alveolar bone, usually for 3-6 months. After the two are combined, re-cut the gums to expose the mounting groove 101 on the implant 1, place the chassis 21 in the matching groove 103, and screw the fixing frame 22 through the long hole 201 into the mounting groove 101 to pre-fix the chassis 21.

[0077] S4, adjust the position of the base plate 21 to ensure that the side of the base plate 21 away from the implant 1 is flush with the gums, and then use a tool to tighten the fixing frame 22 to fully fix the base plate 21.

[0078] S5, injecting the elastic material into the connecting hole 203, allowing the elastic material to fill the installation groove 101, the connecting hole 203 and the receiving cavity 202, and draining the saliva in the installation groove 101, the connecting hole 203 and the receiving cavity 202.

[0079] S6. After the elastic material solidifies, the top seat 23 is fixed on the bottom plate 21, and the top seat 23 is abutted against the elastic material in the cavity 202. The elastic material is used to provide additional support and cushioning for the top seat 23, thereby reducing stress concentration on the crown 3 when subjected to force. Then, an adhesive is used to fix the crown 3 on the top seat 23 to complete the entire dental implant surgery.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A denture, characterized in that: It comprises an implant (1), an abutment (2) and a crown (3), wherein: One end of the implant (1) is provided with a mounting groove (101); The base (2) comprises a base (21), a fixing frame (22) and a top seat (23); the base (21) is arranged on the implant (1) in a manner of being pressed against and rotatable, and a long hole (201) is provided inside the base; the fixing frame (22) is arranged through the long hole (201), one end of which is detachably fixed in the mounting groove (101), and the other end of which is fixed against a side of the base (21) away from the implant (1); the top seat (23) is detachably fixed on the base (21); The dental crown (3) is fixedly arranged on the top seat (23).

2. A denture according to claim 1, characterized in that: An implant thread (102) is provided on the outer side of the implant (1), and the implant (1) is connected to the alveolar bone via the implant thread (102); The fixing frame (22) is connected to the mounting groove (101) by threaded engagement; The top seat (23) is connected to the bottom plate (21) by threaded fitting, the top seat (23) is connected to the crown (3) by bonding, and the center line of the top seat (23), the center line of the fixing frame (22) and the center line of the implant (1) do not overlap with each other.

3. A denture according to claim 2, characterized in that: The center line of the implant (1) is inclined with respect to the center line of the fixing frame (22); when the top seat (23) is rotated, the center line of the top seat (23) can be parallel to and spaced from the center line of the implant (1) or the fixing frame (22).

4. A denture according to claim 1, characterized in that: The end of the implant (1) is provided with a matching groove (103), and the inner wall of the matching groove (103) is spherical; A cavity (202) is provided on a side of the base plate (21) away from the implant (1); the inner wall of the cavity (202) and the side of the base plate (21) close to the implant (1) are both spherical, and the top seat (23) blocks the cavity (202).

5. A denture according to claim 4, characterized in that: A connecting hole (203) is provided in the fixing frame (22), and two ends of the connecting hole (203) are respectively connected to the mounting groove (101) and the containing cavity (202).

6. A denture according to claim 5, characterized in that: The cavity (202) is provided with an internal thread (204), the top seat (23) is provided with an external thread (205), and the internal thread (204) and the external thread (205) are matched and connected; The pitch of the internal thread (204) is equal to the pitch of the external thread (205), the width of the thread groove of the internal thread (204) is smaller than the width of the thread groove of the external thread (205), and the cavity (202), the connecting hole (203) and the installation groove (101) are all filled with elastic material.

7. A denture according to claim 4, characterized in that: The fixing frame (22) comprises a screw rod (221), a screw head (222) and a supporting block (223), wherein: The screw rod (221) is connected to the installation groove (101) by threaded engagement and passes through the elongated hole (201); The screw head (222) is fixedly arranged at an end of the screw rod (221) away from the installation groove (101); The abutment block (223) is sleeved on the screw rod (221) and is disposed between the screw head (222) and the bottom plate (21), and one end of the abutment block (223) close to the bottom plate (21) is spherical.

8. A denture according to claim 2, characterized in that: The implant thread (102) comprises a first thread (1021) and a second thread (1022), wherein: The first thread (1021) is located at an end of the implant (1) away from the tooth crown (3), and the width of the thread groove of the first thread (1021) gradually decreases along the direction from the implant (1) to the tooth crown (3); The second thread (1022) is located at one end of the implant (1) close to the tooth crown (3), and the pitch of the second thread (1022) is smaller than the pitch of the first thread (1021).

9. A denture according to claim 8, characterized in that: The outer side of the implant (1) is provided with a spiral groove (104) and a straight groove (105), wherein: The spiral groove (104) is connected to the first thread (1021), the spiral direction of the spiral groove (104) is opposite to the spiral direction of the first thread (1021), the pitch of the spiral groove (104) is greater than the pitch of the first thread (1021), and the cross-section of the spiral groove (104) is V-shaped; The straight groove (105) is connected to the second thread (1022), a side wall in the straight groove (105) is perpendicular to the circumferential side of the implant (1) located at the position of the straight groove (105), and the inner diameter of the straight groove (105) first increases and then decreases along the axial direction of the implant (1).

10. A method for installing a denture according to claim 6, characterized in that: The following steps are involved: S1, cutting the gums and opening a hole in the alveolar bone that matches the implant (1); S2, screwing the implant (1) into the hole and suturing the gums; S3, after the implant (1) is combined with the alveolar bone, the installation groove (101) is exposed, the base plate (21) is placed in the matching groove (103), and the fixing frame (22) is passed through the long hole (201) and screwed into the installation groove (101); S4, adjusting the position of the base plate (21) so that the side thereof away from the implant (1) is flush with the gums, and then tightening the fixing frame (22); S5, injecting elastic material into the connecting hole (203), and allowing the elastic material to fill the installation groove (101), the connecting hole (203) and the cavity (202); S6, the top seat (23) is fixedly arranged on the bottom plate (21), the top seat (23) is allowed to abut against the elastic material in the cavity (202), and the dental crown (3) is fixedly arranged on the top seat (23).

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