Edentulous jaw precision accessory structure and restoration method
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- PENGBO (SHENZHEN) MEDICAL TECH CO LTD
- Filing Date
- 2026-03-26
- Publication Date
- 2026-06-09
AI Technical Summary
Edentulous patients face problems such as loss of chewing function, facial collapse, and difficulty in speaking. Traditional complete dentures are difficult to retain and stabilize, and existing precision accessory restorations are difficult to clean and have a short lifespan.
A precision attachment structure for edentulous jaws is designed, including a crown, abutment framework, cushioning pad, and fixation rod. Oral data is acquired through 3D scanning technology, and CAD design and personalized manufacturing process are adopted. The structure combines trapezoidal and drum-shaped structures to form a rigid link, while the cushioning pad provides elastic cushioning and facilitates cleaning and maintenance.
It achieves stable occlusal function, is easy to clean, extends service life, has a stable structure, is easy to clean, mimics the occlusal elasticity of natural teeth, and is convenient to clean.
Smart Images
Figure CN122163342A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of dental implant technology, specifically to a precision accessory structure and restoration method for edentulous jaws. Background Technology
[0002] Edentulous patients face severe problems such as loss of chewing function, facial collapse, and difficulty speaking. The retention and stability of traditional complete dentures often fail to meet their functional needs. Implant-supported precision attachment restoration technology provides a more stable, comfortable, and functional restoration solution for edentulous patients by implanting implants into the jawbone and utilizing the retention mechanism of precision attachments.
[0003] With the rapid development of modern oral medicine, edentulous patients no longer face the predicament of only being able to wear traditional removable dentures. Implant-supported edentulous restorations have become an important part of modern implantology. Their core lies in providing stable intraosseous retention through implants, combined with precision attachments to achieve denture retention, stability, and functional restoration. With the development of materials science, manufacturing technology, and digital technology, precision attachment restoration techniques for edentulous patients are showing a diversified development trend, providing clinicians with more treatment options. The core principle of precision attachment restoration technology is to achieve denture retention, stability, and functional transfer through a precise connection device between the implant and the denture. Significant differences in retention force, stability, comfort, cleaning difficulty, and lifespan directly affect the stability and functional performance of the restoration. According to clinical research data:
[0004] Edentulous fixed prostheses are rigidly connected to implants, and patients cannot remove them themselves. They need to be cleaned by professional instruments in a professional dental clinic. The area under the connecting rod and the gap between the inner and outer crowns are cleaning dead zones. Inadequate cleaning leads to plaque accumulation and a higher incidence of implant periodontitis.
[0005] Removable prostheses for edentulous jaws are elastically connected to the implants through precision attachments. The prostheses are made using traditional resin stacking techniques, which generally require a certain thickness of the mucosa. The materials are prone to aging and deformation, and the lifespan is about 3 years.
[0006] Precision accessories are generally standard parts and need to be purchased in advance and stocked. The appropriate specifications should be selected according to the needs of different scenarios. Summary of the Invention
[0007] The purpose of this invention is to provide a precision attachment structure and restoration method for edentulous jaws, which solves the problems mentioned in the background art.
[0008] Technical solution
[0009] To achieve the above objectives, the present invention provides the following technical solution: a precision attachment structure for edentulous jaws, comprising, from top to bottom, a crown, an abutment support, a buffer pad, a fixing rod, and a central screw. The abutment support has an upper part with a tooth-like shape to accommodate the crown restoration, and its bottom is flared and larger than the bottom diameter of the fixing rod. The abutment support has an internal cavity structure with tapered sidewalls to guide the insertion of the abutment support into the fixing rod, and it fits snugly against the sidewalls of the fixing rod. The upper functional structure of the cavity structure is trapezoidal, and the trapezoidal structure has a convergence angle on its side. The top has a flat surface, serving two functions: first, to guide installation; second, to form a frictional fixation after assembly with the trapezoidal structure of the fixing rod. The upper functional structure of the cavity includes a drum-shaped structure. From top to bottom, the drum-shaped structure has a top flat surface that fits with the top of the buffer pad, a side drum-shaped area that fits with the drum-shaped area of the outer drum-shaped structure of the buffer pad, and a bottom flat surface that fits with the outer bottom flat surface of the buffer pad. The drum-shaped structure encloses the buffer pad to prevent it from falling off, and the maximum diameter of the tightened part of the drum-shaped structure is smaller than the maximum diameter of the outer drum-shaped structure of the buffer pad. The internal cavity structure of the base support changes during the design process as the structure of the fixing rod changes.
[0010] The buffer pad is made of plastic and is installed in the drum-shaped structure of the base support cavity. It has a top plane, an inner plane, a keyway area (a groove is cut at the top to form a C-shaped structure for lateral elastic buffering), an outer drum-shaped structure, an inner drum-shaped structure, an inner trapezoidal sidewall, and a bottom plane. The top plane is in contact with the top plane of the base support, and the outer drum-shaped structure is in contact with the side drum-shaped area of the base support. The inner plane is in contact with the upper plane of the fixed rod drum-shaped structure. The drum-shaped area of the inner drum-shaped structure is in contact with the outer drum-shaped area of the fixed rod drum-shaped structure. The inner trapezoidal sidewall has a certain convergence angle to guide the installation, and the maximum diameter of the upper part of the trapezoid is smaller than the maximum diameter of the inner drum-shaped structure, and also smaller than the maximum diameter of the outer drum-shaped area of the fixed rod. There is a certain gap between the bottom plane and the bottom platform of the fixed rod drum-shaped structure.
[0011] The fixing rod is made of metal, and its bottom cavity structure has a tapered sidewall to guide the installation and facilitate the insertion of the base bracket into the fixing rod. The upper part features a trapezoidal structure, a drum-shaped structure, an implantation interface connection structure, and through screw holes. The trapezoidal structure has a certain angle of convergence on its sidewall to guide the installation, and it fits snugly against the side of the trapezoidal structure inside the base bracket. Its top plane fits snugly against the top plane of the trapezoidal structure inside the base bracket. The drum-shaped structure includes a U-shaped groove, a drum-shaped area, and a cylindrical area. The U-shaped groove provides the drum-shaped structure with a certain inward retraction space when the base bracket is fitted with the buffer pad, allowing it to quickly spring back after insertion and fit snugly against the drum-shaped area of the drum-shaped structure inside the buffer pad. Fit; the diameter of the cylindrical area is equal to the minimum diameter of the drum-shaped area; the implant interface connection structure is inserted into the implant abutment interface (the interface has various structures: polygonal structure, cylindrical structure, conical structure), its shape is consistent with the implant abutment interface, its bottom surface fits the implant abutment interface surface, and the screw is fixedly connected by passing through the screw hole and being tightened on the threaded thread on the implant; the fixation bar includes trapezoidal structure, drum-shaped structure and implant interface connection structure, all of which are formed by one-piece cutting process. Among them, the trapezoidal structure and drum-shaped structure can be personalized according to the actual situation after the oral implant is implanted, so as to ensure that the overall fixation bar has stronger and more stable load-bearing capacity.
[0012] Furthermore, the implant is inserted into the human bone. After the implant has been integrated and stabilized with the alveolar bone for a period of time, the actual environment data of the oral cavity is obtained through three-dimensional scanning technology. The three-dimensional coordinate system of the implant is located in the data using CAD design software. Then, the crown is designed using CAD based on the actual environment data of the oral cavity, and the abutment framework and fixation rod are disassembled. After completion, the crown is 3D printed or CNC machined, the abutment framework and fixation rod are CNC machined, and the plastic pad is formed by injection molding.
[0013] Furthermore, after production, the fixing rod is connected to the implant via screws; after the abutment support is assembled with the buffer pad, it is inserted into the fixing rod through the trapezoidal structure in the cavity structure. A certain force is applied to the abutment support with the buffer pad, so that it interlocks with the bulging structure area on the fixing rod, ensuring that the abutment support and the fixing rod do not separate within a certain tensile force. At the same time, the outside of the abutment support covers the outside of the fixing rod, which also ensures that food debris does not enter the interior of the fixing rod and the implant. Moreover, the trapezoidal structure on the abutment support and the trapezoidal structure on the fixing rod form a rigid connection after interlocking, making the abutment support more stable and able to withstand the same lateral biting force of natural teeth.
[0014] Furthermore, the crown is bonded to the abutment support to form a whole, and the cushioning pad has a certain elasticity to cushion the bite, so that it has the elasticity function of mimicking the bite of a natural tooth when biting or chewing normally in the mouth.
[0015] Furthermore, when the pulling force continues to increase to a certain level, the abutment support of the bonded crown separates from the fixing rod. The abutment support of the bonded crown can be removed from the mouth separately for thorough cleaning and maintenance. After cleaning and maintenance, it can be reinserted into the mouth for use according to the procedure.
[0016] This invention provides a precision attachment structure and restoration method for edentulous jaws. It has the following beneficial effects:
[0017] This precision implant structure and restoration method for edentulous jaws involves implanting an implant into the human skeleton. After the implant has integrated and stabilized with the alveolar bone over a period of time, 3D scanning technology is used to obtain actual intraoral environmental data. CAD design software is then used to locate the implant's 3D coordinate system within the data. Based on the actual intraoral environmental data, the crown is designed using CAD, and the abutment and fixation rod are then disassembled. The crown is then 3D printed or CNC machined, while the abutment and fixation rod are CNC machined. The plastic pad is injection molded. After production, the fixation rod is connected to the implant with screws. After the abutment and cushioning pad are assembled, they are guided and inserted into the fixation rod through a trapezoidal structure within the cavity. A certain force is applied to the abutment and cushioning pad, causing them to interlock with the bulging structural area on the fixation rod. The abutment support and fixation rod remain connected under certain tensile force, and the abutment support also completely covers the outside of the fixation rod. This prevents food debris from entering the fixation rod and implant. The trapezoidal structure on the abutment support and the trapezoidal structure on the fixation rod interlock to form a rigid connection, making the abutment support more stable and able to withstand the same lateral biting force as natural teeth. The crown is bonded to the abutment support to form a whole, and the cushioning pad has a certain degree of elasticity, mimicking the elasticity of natural teeth during normal biting or chewing. When the tensile force continues to increase to a certain level, the abutment support with the crown bonded to it will separate from the fixation rod. The abutment support with the crown bonded to it can be removed from the mouth separately for thorough cleaning and maintenance. After cleaning and maintenance, it can be reinserted into the mouth according to the procedure. Therefore, the structure is stable, has a long service life, and is easy to clean. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of the present invention;
[0019] Figure 2 For the present invention Figure 1 Schematic diagram of the central fixation rod and implant structure;
[0020] Figure 3 For the present invention Figure 1 Schematic diagram of the buffer pad and implant structure. Detailed Implementation
[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0022] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.
[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0024] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0025] like Figure 1-3As shown, this embodiment of the invention provides a precision attachment structure and restoration method for edentulous jaws, including, from top to bottom, a crown 100, an abutment support 200, a buffer pad 300, a fixing rod 400, and a central screw 700. The abutment support 200 has an abutment tooth shape 203 on its upper external structure to accommodate the crown 100 restoration, and its bottom 204 is flared and larger than the diameter of the bottom 406 of the fixing rod 400. The abutment support 200 has a cavity structure inside, and the sidewall 2023 of the cavity structure has a tapered shape to guide the installation, facilitating the insertion of the abutment support 200 onto the fixing rod 400 and fitting snugly against the sidewall 406 of the fixing rod 400. The upper functional structure of the cavity structure is a trapezoidal structure 202, with a convergence angle 2022 on the side and a flat surface 202 on the top. 1. The first function is to guide the installation, and the second function is to form a frictional fixation after assembly with the trapezoidal structure 403 of the fixing rod 400; the upper functional structure of the cavity structure is the drum-shaped structure 201, which has a top plane 2012 that fits with the top 3014 of the buffer pad 300, a side drum-shaped area 2011 that fits with the drum-shaped area 3011 of the outer drum-shaped structure 301 of the buffer pad 300, and a bottom plane 2013 that fits with the outer bottom plane 3012 of the buffer pad 300. The drum-shaped structure 201 wraps around the buffer pad 300 to prevent it from falling off, and the maximum diameter of the tightened part of the drum-shaped structure 201 is smaller than the maximum diameter of the outer drum-shaped structure 301 of the buffer pad 300; the internal cavity structure of the base support 200 changes with the structural changes of the fixing rod 400 during the design process.
[0026] The buffer pad 300 is made of plastic and is installed in the drum-shaped structure 201 of the cavity structure of the base support 200. It has a top plane 3014, an inner plane 3024, a keyway area 3023 (a slot is made at the top to form a C-shaped structure for lateral elastic buffering), an outer drum-shaped structure 301, an inner drum-shaped structure 302, an inner trapezoidal sidewall 3022, and a bottom plane 3013. The top plane 3014 fits against the top plane 2012 of the base support 200, and the outer drum-shaped structure 301 fits against the side drum-shaped area 2011 of the base support 200. The inner plane 3024 is in contact with the upper plane 4043 of the drum-shaped structure 404 of the fixing rod 400; the drum-shaped area 3021 of the inner drum-shaped structure 302 is in contact with the outer drum-shaped area 4041 of the drum-shaped structure 404 of the fixing rod 400; the inner trapezoidal sidewall 3022 has a certain convergence angle to guide the installation, and the maximum diameter of the upper part of the trapezoid is smaller than the maximum diameter of the inner drum-shaped structure 302, and also smaller than the maximum diameter of the outer drum-shaped area 4041 of the fixing rod 400; the bottom plane 3013 has a certain gap space with the bottom platform 4045 of the drum-shaped structure 404 of the fixing rod 400.
[0027] The fixing rod 400 is made of metal. Its bottom cavity structure sidewall 406 has a tapered shape to guide installation, facilitating the insertion of the base support 200 into the fixing rod 400. The upper part is provided with a trapezoidal structure 403, a drum-shaped structure 404, an implantation interface connection structure 401, and a through screw hole 402. The trapezoidal structure 403's sidewall 4031 has a certain convergence angle for installation guidance, fitting against the side 2022 of the trapezoidal structure 202 inside the base support 200. Its top plane 4032 fits against the top plane 2021 of the trapezoidal structure 202 inside the base support 200. The drum-shaped structure 404 has a U-shaped groove 4044, a drum-shaped area 4041, and a cylindrical area 4042. The U-shaped groove 4044 provides the drum-shaped structure 404 with a certain inward retraction space when the base support 200 is fitted with the buffer pad 300, allowing it to quickly spring back after insertion and engage with the buffer pad. The internal drum-shaped structure 302 and drum-shaped area 3021 of the 300 are fitted together; the diameter of the cylindrical area 4042 is equal to the minimum diameter of the drum-shaped area 4041; the implant interface connection structure 401 is inserted into the implant abutment interface 501 (the interface has various structures: polygonal structure, cylindrical structure, conical structure), and its shape is consistent with the implant abutment interface 501. Its bottom surface 4011 fits with the implant abutment interface surface 5011. The screw 700 is fixedly connected to the screw thread 502 on the implant 500 by passing through the screw hole 402 and applying force; the fixing rod 400 includes a trapezoidal structure 403, a drum-shaped structure 404, and an implant interface connection structure 401, all of which are formed by one-piece cutting process. The trapezoidal structure 403 and the drum-shaped structure 404 can be personalized according to the actual situation after the oral implant is implanted to ensure that the overall fixing rod has stronger and more stable load-bearing capacity.
[0028] A method for precision attachment structure restoration of edentulous jaws: An implant 500 is implanted into the human bone 600. After a period of time, the implant integrates and stabilizes with the alveolar bone. Three-dimensional scanning technology is used to obtain actual intraoral environmental data. CAD design software is used to locate the implant's three-dimensional coordinate system within the data. Based on the actual intraoral environmental data, a crown 100 is designed using CAD, and then the abutment framework 200 and fixation rod 400 are disassembled. After completion, the crown 100 is 3D printed or CNC machined. The abutment framework 200 and fixation rod 400 are CNC machined, and the plastic pad is injection molded. After production, the fixation rod 400 is connected to the implant 500 by screws 700. After the abutment framework 200 is assembled with the buffer pad 300, it is inserted into the fixation rod 400 through the trapezoidal structure 202 in the cavity structure. A certain force is applied to the abutment framework 200 with the buffer pad, causing it to bulge against the fixation rod 400. The interlocking structural areas ensure that the abutment support 200 and the fixation rod 400 do not separate under a certain tensile force. The abutment support 200 also covers the outside of the fixation rod 400, preventing food debris from entering the fixation rod 400 and the implant. The trapezoidal structure 202 on the abutment support 200 and the trapezoidal structure 403 on the fixation rod interlock to form a rigid connection, making the abutment support 200 more stable and able to withstand the same lateral biting force as natural teeth. The crown 100 is bonded to the abutment support 200 to form a whole, and the cushioning pad has a certain degree of elasticity, mimicking the elasticity of natural teeth during normal biting or chewing. When the tensile force increases to a certain level, the abutment support 200 with the crown 100 bonded to it separates from the fixation rod 400. The abutment support 200 with the crown 100 bonded to it can be removed from the mouth separately for thorough cleaning and maintenance. After cleaning and maintenance, it can be reinserted into the mouth according to the procedure.
[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A precision attachment structure for edentulous jaws, comprising, from top to bottom, a crown (100), an abutment support (200), a buffer pad (300), a fixing rod (400), and a central screw (700), characterized in that: The abutment support (200) has a tooth-shaped upper part (203) on its external structure to meet the assembly of the crown ((100)) restoration. Its bottom (204) is trumpet-shaped and larger than the diameter of the bottom (406) of the fixing rod (400). The abutment support (200) has a cavity structure inside. The side wall (202) of the cavity structure has a tapered shape to guide the installation and facilitate the insertion of the abutment support (200) into the fixing rod (400) and fit against the side wall (406) of the fixing rod (400). The upper functional structure of the cavity structure is a trapezoidal structure (202). The trapezoidal structure (202) has a convergence angle (202) on its side and a flat surface (202) on its top. Its functions are to guide the installation and to form friction after assembly with the trapezoidal structure (403) of the fixing rod (400). The upper functional structure of the cavity structure is a drum-shaped structure (201). The drum-shaped structure (201) has a top plane (2012) that fits with the top (3014) of the buffer pad (300) from top to bottom. The side drum-shaped area (2011) fits with the drum-shaped area (3011) of the outer drum-shaped structure (301) of the buffer pad (300). The bottom plane (2013) fits with the bottom plane (3012) of the outer side of the buffer pad (300). The drum-shaped structure (201) wraps around the buffer pad (300) to prevent it from falling off. The maximum diameter of the tightened part of the drum-shaped structure (201) is smaller than the maximum diameter of the outer drum-shaped structure (301) of the buffer pad (300). The internal cavity structure of the base support (200) changes with the structural changes of the fixing rod (400) during the design process. The buffer pad (300) is made of plastic and is installed in the drum-shaped structure (201) of the cavity structure of the base support (200). It has a top plane (301), an inner plane (3024), a keyway area (3023) (a groove is made on the top to form a C-shaped structure of the buffer pad, which has a lateral elastic buffering function), an outer drum-shaped structure (301), an inner drum-shaped structure (302), an inner trapezoidal sidewall (3022), and a bottom plane (301). The top plane (301) is in contact with the top plane (2012) of the base support (200), and the outer drum-shaped structure (301) is in contact with the side drum-shaped area (2011) of the base support (200). The inner plane (3024) fits into the upper plane (404) of the drum-shaped structure (404) of the fixing rod (400); the inner drum-shaped structure (302), the drum-shaped area (3021) fits into the fixing rod (400), the drum-shaped structure (404) and the outer drum-shaped area (4044); the inner trapezoidal sidewall (3022) has a certain convergence angle to guide the installation, and the maximum diameter of the upper part of the trapezoid is smaller than the maximum diameter of the inner drum-shaped structure (302), and also smaller than the maximum diameter of the outer drum-shaped area (404) of the fixing rod (400); the bottom plane (301) has a certain gap space with the bottom platform (404) of the drum-shaped structure (404) of the fixing rod (400); The fixing rod (400) is made of metal, and its bottom cavity structure sidewall (406) has a tapered shape to guide the installation and facilitate the insertion of the base support (200) into the fixing rod (400). The upper part is provided with a trapezoidal structure (403), a drum-shaped structure (404), an implantation interface connection structure (401), and a through screw hole (402). The trapezoidal structure (403) sidewall (4031) has a certain convergence angle to guide the installation, and it is connected to the trapezoidal structure inside the base support (200). The side (202) of the structure (202) is fitted, and the top plane (4032) is fitted with the top plane (202) of the trapezoidal structure (202) inside the base support (200); the drum-shaped structure (404) is provided with a U-shaped groove (404), a drum-shaped area (404), and a cylindrical area (404); the U-shaped groove (404) gives the drum-shaped structure (404) a certain inward retraction space when the buffer pad (300) is installed in the base support (200), and it can quickly rebound after being embedded and fit with the base support (200). The internal drum-shaped structure (302) and drum-shaped area (3021) of the buffer pad (300) are fitted together; the diameter of the cylindrical area (404) is equal to the minimum diameter of the drum-shaped area (404); the planting interface connection structure (401) is inserted into the planting base interface (501) (the interface has various structures: polygonal structure, cylindrical structure, conical structure), its shape is consistent with the planting base interface (501), and its bottom surface (4011) is fitted with the planting base interface surface (5011), and the screw (7 00) The screw is fixed and connected to the implant (500) by passing through the screw hole (402) and applying force to lock it. The fixation rod (400) includes a trapezoidal structure (403), a drum-shaped structure (404), and an implant interface connection structure (401), all of which are formed by an integrated cutting process. The trapezoidal structure (403) and the drum-shaped structure (404) can be placed in a personalized manner according to the actual situation after the oral implant is implanted, so as to ensure that the overall fixation rod has a stronger and more stable load-bearing capacity.
2. The method for repairing precision attachment structures in an edentulous jaw according to claim 1, characterized in that: Implants (500) are implanted into human bone (600). After a period of time, the implants are integrated and stabilized with the alveolar bone. The actual environment data of the oral cavity is obtained through three-dimensional scanning technology. The three-dimensional coordinate system of the implants in the data is located by CAD design software. Then, the crown (100) is designed by CAD according to the actual environment data of the oral cavity. The abutment framework (200) and the fixation rod (400) are disassembled. After completion, the crown ((100)) is 3D printed or CNC cut. The abutment framework and fixation rod are CNC cut. The plastic pad is formed by injection molding.
3. The method for repairing precision attachment structures in an edentulous jaw according to claim 2, characterized in that: After production, the fixing rod (400) is connected to the implant (500) by screws (700); after the abutment support (200) is assembled with the buffer pad (300), it is installed and guided into the fixing rod (400) through the trapezoidal structure (202) in the cavity structure. A certain force is applied to the abutment support with the buffer pad, so that it is interlocked with the drum-shaped structure area on the fixing rod, ensuring that the abutment support and the fixing rod do not separate within a certain tensile force. At the same time, the outside of the abutment support covers the outside of the fixing rod, which also ensures that food impurities do not enter the inside of the fixing rod and the inside of the implant. After the trapezoidal structure (202) on the abutment support and the trapezoidal structure (403) on the fixing rod are fitted together, a rigid connection is formed, making the abutment support more stable and able to withstand the same lateral biting force of natural teeth.
4. The method for repairing precision attachment structures in an edentulous jaw according to claim 3, characterized in that: The crown (100) is bonded to the abutment support (200) to form a whole, and the cushioning pad has a certain elasticity and cushioning, and has the elasticity function of mimicking natural teeth when biting or chewing normally in the mouth.
5. The method for repairing precision attachment structures in an edentulous jaw according to claim 4, characterized in that: When the pulling force continues to increase to a certain level, the abutment support (200) of the bonded crown (100) is separated from the fixing rod (400). The abutment support (200) of the bonded crown (100) can be removed from the mouth separately for thorough cleaning and maintenance. After cleaning and maintenance, it can be reinserted into the mouth according to the procedure.