Adhesive-free abutment connecting piece with buffering function

Abstract

The invention discloses an adhesion-free abutment connecting piece with a buffering effect, the adhesion-free abutment connecting piece is used for connecting an implant and a mounting cap, the mounting cap is used for being assembled with a dental crown, an inner cavity with a cold welding angle is formed in the mounting cap, and the adhesion-free abutment connecting piece comprises a sleeve abutment and a sleeve, the central screw is arranged in the sleeve abutment and is used for fixing the sleeve abutment on an implant; the buffer assembly is used for buffering and reducing impact force and is arranged in the sleeve base station; the buffer assembly comprises an elastic piece and U-shaped plates, the two U-shaped plates are arranged in the sleeve base table, the elastic piece is fixedly connected between the U-shaped plates and the sleeve base table, the two U-shaped plates slide relative to each other, and a transition hole is formed between the two U-shaped plates. The mounting efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the field of dental implants, in particular to a connecting piece of a non-adhesive abutment with a buffering function. BACKGROUND

[0002] In the prior art, a commonly used implant abutment in clinical application is made of titanium alloy and is connected with an implant through a screw, and a crown is fixed on the abutment by means of adhesion. Although the structure can realize the connection of the crown and the implant, the adhesion and retention need to use an adhesive, and the operation of installing and dismounting the crown is complicated, especially when the crown needs to be checked, replaced or maintained, the crown is inconvenient to use, the efficiency of installing and using the crown is reduced, and in the process of occlusion, the chewing force and the contact force of the crown cannot be effectively relieved or dispersed through a flexible structure because the crown is directly fixed through a screw and is connected through an adhesive, so that the implant and the abutment bear a large direct stress, and the buffering function of the overall structure is weak. SUMMARY

[0003] The application aims to provide a connecting piece of a non-adhesive abutment with a buffering function, and solves the problems of inconvenient installation and use of the crown and insufficient buffering, and reduces the installation efficiency.

[0004] To achieve the above purpose, the application adopts the following technical scheme: A connecting piece of a non-adhesive abutment with a buffering function is used for connecting an implant and installing a cap, the cap is used for assembling with a crown, an inner cavity with a cold welding angle is arranged in the cap, and the connecting piece comprises: A sleeve abutment is used for being installed on the implant and forming a taper self-locking with the cap. A central screw is arranged in the sleeve abutment and is used for fixing the sleeve abutment on the implant. A buffering assembly is arranged in the sleeve abutment and is used for buffering and reducing the impact force. The buffering assembly comprises elastic members and U-shaped plates, two U-shaped plates are arranged in the sleeve abutment, the elastic members are fixedly connected between the U-shaped plates and the sleeve abutment, the two U-shaped plates slide relative to each other, and a transition hole is formed between the two U-shaped plates.

[0005] Preferably, the sleeve abutment is in a columnar structure, and an outer taper surface is arranged at the top of the sleeve abutment.

[0006] Preferably, the cap is provided with a through hole through which the central screw passes and is fixed on the implant, and the size of the transition hole is larger than that of the through hole.

[0007] Preferably, the inner cavity of the cap is provided with an annular groove to enhance the taper self-locking effect of the sleeve abutment.

[0008] Preferably, the outer taper surface of the top of the sleeve abutment is a second cold welding angle, the sleeve abutment is in interference fit between the outer taper surface and the mounting cap, the first cold welding angle and the second cold welding angle have the same angle and range from 1° to 15°.

[0009] Preferably, the central screw is arranged at the center of the inside of the sleeve abutment.

[0010] Preferably, a screw hole corresponding to the central screw is arranged in the inside of the implant, and the screw hole does not extend to the surface of the top of the sleeve abutment, so as to avoid affecting the appearance due to the exposed screw hole.

[0011] Preferably, a connecting thread is arranged on the outer surface of the implant, and a mounting hole in communication with the thread hole is arranged in the inside of the implant.

[0012] Preferably, a direction groove is arranged on the surface of the sleeve abutment.

[0013] Compared with the prior art, the present application has the following beneficial effects: During installation, the crown is manually installed at the top end of the mounting cap, and the sleeve abutment is fixed on the implant by using the central screw, so that the crown can be quickly and accurately docked with the sleeve abutment through the mounting cap, the traditional bonding method is saved, and the inconvenience and risk caused by the residual adhesive are avoided, then the mounting cap is manually placed on the sleeve abutment and pressed downward, so that the mounting cap moves downward and forms a taper self-locking with the sleeve abutment, solving the inconvenience of installing and using the crown; when the crown is used for chewing, the crown is subjected to the impact force of extrusion, then the crown transmits the impact force to the mounting cap, the mounting cap transmits the impact force to the sleeve abutment, the sleeve abutment absorbs part of the impact force for buffering, at the same time, the surface of the sleeve abutment is slightly deformed, so that the sleeve abutment transmits the impact force to the elastic member through elasticity, so that the elastic member is compressed and pushes the U-shaped plates to slide relative to each other, so as to disperse and consume the impact force, reduce the impact force, and further buffer, thereby solving the problem of insufficient buffering. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0015] The structure, proportion, size and the like shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and do not have technical significance in defining the conditions for implementing the application, so any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the application, should still fall within the scope of the disclosed technology.

[0016] Figure 1 is a schematic diagram of the overall structure of the application; Figure 2 is a schematic diagram of the cross-sectional structure of the central screw, screw hole and mounting hole components of the application; Figure 3 is a schematic diagram of the structure of the through hole, transition hole and U-shaped plate components of the application.

[0017] Illustration: 1, implant; 2, mounting cap; 3, sleeve abutment; 4, central screw; 5, annular groove; 6, screw hole; 7, outer taper; 8, direction groove; 9, mounting hole; 10, through hole; 11, buffer assembly; 111, elastic member; 112, U-shaped plate; 113, transition hole. DETAILED DESCRIPTION

[0018] In order to make the invention purpose, features and advantages of the application more obvious and easy to understand, the technical solutions in the embodiments of the application will be described clearly and completely below in conjunction with the drawings in the embodiments of the application. Obviously, the embodiments described below are only a part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the application.

[0019] In the description of the application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a component disposed therebetween.

[0020] The technical solutions of the application will be further described below in conjunction with the drawings and through specific embodiments.

[0021] Reference Figure 1 - Figure 3As shown, the embodiment of the present application provides a kind of abutment connector with buffering effect, for connecting implant 1 and installation cap 2, the installation cap 2 is used to be assembled with dental crown, its inside is provided with inner cavity with cold welding angle, comprising: Sleeve abutment 3 is used to be installed on implant 1, and form taper self-locking with installation cap 2; Central screw 4 is arranged in the inside of sleeve abutment 3, for fixing sleeve abutment 3 on implant 1; Buffering assembly 11 is used to buffer and reduce impact force, and is arranged in the inside of sleeve abutment 3; The buffering assembly 11 includes: elastic member 111 and U-shaped plate 112, the inside of the sleeve abutment 3 is provided with two U-shaped plates 112, the elastic member 111 is fixedly connected between the U-shaped plate 112 and the sleeve abutment 3, the two U-shaped plates 112 slide relative to each other, and a transition hole 113 is formed between the two U-shaped plates 112;Wherein implant 1 refers to a kind of artificial implant for replacing missing tooth root, usually made of titanium alloy or titanium and other biocompatible materials;Sleeve abutment 3 refers to the component connected with implant, located at the upper end of implant, and plays the role of connecting implant and artificial dental crown or denture;Central screw 4 is a key fixing element for fixing between sleeve abutment and implant, which is usually used to firmly fix the sleeve abutment on the top of implant, to ensure the stability and reliability of implant system;Dental crown refers to artificial restoration covering on implant, aiming to restore the appearance and function of missing teeth;And the above-mentioned elastic member is a kind of elastic element, for example: spring, air bag and spring sheet.

[0022] When the installation cap 2 is fixedly installed on the dental crown, and the sleeve abutment 3 with buffering assembly 11 in the inside is installed on the implant 1 through the central screw 4, the installation cap 2 with dental crown is locked on the sleeve abutment 3 through the inner cavity.

[0023] Reference Figure 1 With Figure 2 As shown, the sleeve abutment 3 is in columnar structure, and the top thereof is provided with outer taper surface 7.

[0024] In the process of installation, first, manually place the dental crown on the top end of the installation cap 2, then manually sleeve the installation cap 2 on the sleeve abutment 3, since the top of the sleeve abutment 3 is provided with the outer taper surface 7, the outer taper surface 7 guides the installation cap 2 to automatically align the top position of the sleeve abutment 3, so as to ensure the accurate position of the installation cap 2 during installation, avoid deviation or misinstallation, then manually press to make the inner cavity of the installation cap fit with the outer taper surface 7 at the top of the sleeve abutment 3, so that the outer taper surface 7 prevents the installation cap 2 from loosening during use by increasing friction force, to ensure that the installation cap 2 is stably fixed on the sleeve abutment 3, so that the installation cap 2 and the sleeve abutment 3 form taper self-locking.

[0025] ReferenceFigure 1 、 Figure 2 With Figure 3 As shown in the sleeve base 3 inside the through hole 10, the central screw 4 through and fixed on the implant 1, the implant 1 inside the installation hole 9 with threaded hole communication.

[0026] In the process of installation, manual sleeve base 3 into the installation hole 9, the sleeve base 3 bottom end of the taper and installation hole 9 inside the paste, then the central screw 4 into the sleeve base 3 through hole 10, the bottom end of the central screw 4 through the hole 10 into the screw hole 6, then manually through the screwdriver into the through hole 10 contact central screw 4 and rotate, the central screw 4 slowly into the screw hole 6 fixed, so that the implant 1 and sleeve base 3 through the central screw 4 tightly connected.

[0027] Referring to Figure 2 The installation cap 2 cavity is provided with an annular groove 5.

[0028] When the above installation cap 2 sleeve on the outer taper 7 of the sleeve base 3, because the installation cap 2 cavity and the outer taper 7 paste, so the installation cap 2 inside also uses the taper, and in the cavity annular groove 5, the position of the top of the annular groove 5 radius is larger (the inner diameter is unchanged, the outer diameter is reduced), the metal or plastic wall thickness of the annular groove 5 periphery is thin, the edge of the annular groove 5 will make the contact surface form multiple "high pressure ring belt", the local partial pressure of these positions is higher than that of the uniform contact surface without annular groove 5, so as to produce slight radial contraction, more closely contact the taper, improve the contact pressure, and multiple high pressure ring belt is equivalent to multiple "retention ring", so that the slip needs to overcome multiple local high friction area, enhance the self locking.

[0029] Referring to Figure 1 With Figure 2 The outer taper 7 of the sleeve base top angle is the second cold welding angle, the sleeve base 3 is in interference fit between the outer taper 7 and the installation cap 2, the first cold welding angle and the second cold welding angle have the same angle and the range is 1° to 15°; Morse taper is a kind of taper connection commonly used in mechanical engineering, especially in lathe, milling machine, drilling machine and other machine tools. The characteristic of Morse taper connection is that it has a certain taper angle, so that the inserted tool or part can be stably fixed by self locking mechanism.

[0030] When the installation cap 2 and the sleeve base 3 are in contact, due to the existence of the first cold welding angle and the second cold welding angle, which refers to the Morse taper with cold welding effect, they will achieve the "self-locking" phenomenon through the friction force of the contact surface during assembly. Specifically, when two components with Morse taper are assembled, the smaller the taper angle, the tighter and the greater the friction force of the contact surface, which is easy to form a cold welding effect. This is because a smaller taper angle means that the contact area of the two components increases when they are in contact, and the friction and pressure also increase accordingly, so that the friction of the mating surfaces makes them fasten to each other, thereby avoiding loosening and displacement. The cold welding effect generally refers to the mutual contact of metal surfaces under high pressure and the formation of a firm bond through plastic deformation (usually at the micro level) without heating. It is achieved by the action of friction, pressure and time, causing the metal surfaces to adhere to each other, similar to a welding effect, especially for metal surfaces. The angle of the cold welding angle is 1° to 15°, which has become an industry standard and is widely accepted design, especially in the field of dental implants. This design has been extensively practiced and verified to provide high compatibility and stability, and meets the standards of most dental implant systems. If it is not within this angle range, the cold welding effect during installation and assembly will be poor, affecting the compatibility of existing equipment and accessories, and increasing the difficulty of new production and installation. The angle of the cold welding angle is 1° to 15°, which has been verified as the most stable and standardized design, and the friction is sufficient to offset the axial pull-out force, without the need for additional fasteners to maintain the lock. Therefore, as long as it is inserted and a certain radial pressure is generated, a stable friction self-locking will be formed.

[0031] Referring to Figure 1 With Figure 2 As shown, the central screw is arranged at the center position inside the sleeve base.

[0032] During installation, the central screw 4 is designed at the center position inside the sleeve base 3, which makes the screw most uniform in its fixing effect between the implant 1 and the jawbone. This is because when the force generated during chewing acts on the implant 1, these forces will be evenly transmitted to the entire implant 1 through the central screw 4, thereby maximizing the balance of forces on the implant 1, allowing the screw at the center position to more evenly distribute external forces, thereby avoiding loosening or positional displacement of the implant 1 due to uneven forces during chewing. This design helps to improve the stability and durability of the implant 1. If the screw position deviates from the center, it will result in uneven distribution of forces, causing some areas to bear excessive stress and increasing the risk of loosening or damage.

[0033] Referring to Figure 1 Figure 2 As shown, the implant 1 has a screw hole 6 corresponding to the central screw 4, and the screw hole 6 does not extend to the top surface of the sleeve base 3.

[0034] In the process of installation, the sleeve abutment 3 is manually placed into the installation hole 9 of the implant 1, and the maximum radius of the sleeve abutment 3 is the same as the radius of the installation hole 9, and the through hole 10 is arranged at the center of the sleeve abutment 3, and a threaded hole is arranged in the installation hole 9, and the through hole 10, the installation hole 9 and the threaded hole are communicated, and then the central screw 4 is manually placed into the sleeve abutment 3, so that the central screw 4 enters the screw hole 6 in the installation hole 9 through the transition hole formed between the through hole 10 and the U-shaped plate, and then the central screw 4 is manually rotated by a screwdriver to be slowly screwed into the screw hole 6 through the thread, and then the sleeve abutment 3 is fixedly connected with the implant 1. It should be noted that the upper surface of the implant 1 directly contacts the oral environment, especially during the healing process after implant surgery, and it is crucial to maintain the integrity of the top surface. By not extending the screw hole 6 to the top, the area of the screw hole 6 exposed in the oral cavity is reduced, thereby helping to prevent the accumulation of bacteria or biofilm, reducing the risk of bacteria or contaminants entering the screw hole 6, reducing the occurrence of inflammation and infection, and facilitating the smooth progress of postoperative healing; the implant 1 will be subjected to more wear and tear or through the action of external forces, especially the concentrated action of masticatory force, and if the screw hole 6 extends to the top surface, the material at the screw hole 6 will be damaged or fatigued. By not extending the screw hole 6 to the top surface, the contact with the outside world is reduced, which can avoid this potential risk of damage, thereby improving the service life of the implant 1.

[0035] Reference Figure 1 With Figure 2 As shown in the figure, the outer surface of the implant 1 is provided with a connecting thread.

[0036] During the implantation process, the implant 1 is tightly combined with the jaw bone (usually the bone of the upper or lower jaw) through the thread, so that the thread reduces the movement of the implant 1 during the healing process through the friction and embedding force with the bone tissue, so that the thread can help the implant 1 to be better fixed in the bone tissue during implantation, increase the initial stability, and at the same time after implantation, bone cells will grow to the surface of the thread, gradually filling the thread gap, further fixing the implant 1, forming a stable osseointegration connection. Compared with the smooth surface of the implant 1, the surface of the thread can provide more bone contact area, which helps to achieve osseointegration faster and more firmly.

[0037] Reference Figure 1 , Figure 2 With Figure 3 As shown in the figure, the surface of the sleeve abutment 3 is provided with a direction groove 8.

[0038] Mounting cap 2 is typically a cylindrical part, while sleeve base 3 is a fixed base that mates with the sleeve. Mounting cap 2 needs to be precisely installed on sleeve base 3. The position of mounting cap 2 is determined by the orientation groove 8 to determine whether it is correctly installed. Then it is installed on sleeve base 3, thus ensuring the accuracy of this docking process. The presence of orientation groove 8 allows the sleeve to automatically align to the correct position during installation, avoiding deviation or misalignment.

[0039] refer to Figure 2 and Figure 3 As shown, the buffer assembly 11 includes: an elastic element 111 and a U-shaped plate 112. Two U-shaped plates 112 are provided inside the sleeve base 3. The elastic element 111 is fixedly connected between the U-shaped plate 112 and the sleeve base 3. The two U-shaped plates 112 slide against each other, and a transition hole 113 is formed between the two U-shaped plates 112.

[0040] During chewing, the impact force on the crown is applied to the sleeve, which then transmits the impact force to the sleeve abutment 3. The sleeve abutment 3 is made of PEEK, a high-performance engineering plastic widely used in the medical and dental implant fields, particularly in dental implants, implant 1, and abutments. PEEK reduces stress shielding and lowers the risk of surrounding bone resorption, thus providing a certain buffering effect. The sleeve abutment 3 absorbs some of the impact force through the PEEK material. Simultaneously, the sleeve abutment 3 undergoes a slight inward deformation under the impact force. This deformation compresses the elastic element 111 inside the sleeve abutment 3, causing the elastic element 111 to compress and push the two U-shaped plates 112 to slide against each other. Because a second spring (not shown) is provided at the connection point of the sliding joint of the two U-shaped plates 112, the sliding... During the movement, the second spring is compressed, thereby reducing the diameter of the transition hole 113 and stretching the elastic element 111, further achieving buffering and reducing the impact force acting on the crown. When chewing stops, the crown is no longer subjected to impact force, so the surface of the sleeve base 3 is no longer subjected to impact force. Then, the U-shaped plate 112 inside the sleeve begins to extend towards the inner wall of the sleeve through the second spring inside itself, causing the second spring to push the U-shaped plate 112 to slide and separate from each other. Thus, the U-shaped plate 112 pushes the elastic element 111 and compresses it, causing the elastic element 111 to compress the inner wall of the sleeve base 3. Then, the sleeve base 3 begins to recover its deformation under the compressive force of its internal elastic element 111, causing the sleeve base 3 to reset by pulling the elastic element 111 out. Then, the elastic element 111 pulls the U-shaped plate 112 to slide and reset.

[0041] Working principle: During installation, the sleeve abutment 3 is first placed into the mounting hole 9 of the implant 1, so that the conical surface at the bottom of the abutment fits the inside of the mounting hole 9. Then, the central screw 4 is inserted through the central through hole 10 of the abutment and screwed into the screw hole 6 of the implant 1 to ensure that the sleeve abutment 3 and the implant 1 are tightly fixed. Subsequently, the crown is pre-assembled with the mounting cap 2 and the mounting cap 2 is placed on top of the sleeve abutment 3 to achieve rapid installation. Since the upper part of the sleeve abutment 3 has an outer conical surface 7 and the inner cavity of the mounting cap 2 has a cold welding angle of 1° to 15°, the two will automatically align and fit during assembly. Through interference fit and friction, a tapered self-locking is formed. The annular groove 5 in the inner cavity of the mounting cap 2 generates multiple local high-pressure rings on the contact surface, further enhancing the fitting force and anti-retraction effect, ensuring that the mounting cap 2 will not loosen under force. During this process, the directional groove 8 plays a positioning role to ensure accurate installation direction, and finally achieves a stable combination of the crown, mounting cap 2 and sleeve abutment 3, so that the entire restoration remains stable under the action of masticatory force. When chewing with a dental crown, the crown is subjected to the impact of compression. The crown then transmits this impact to the mounting cap 2, which in turn transmits it to the sleeve base 3. The sleeve base 3 is made of PEEK, a high-performance engineering plastic with slight elasticity. When an impact force acts on it, it undergoes slight deformation. Therefore, the sleeve base 3 absorbs part of the impact force through the PEEK material for cushioning. At the same time, the slight deformation of the surface of the sleeve base 3 allows it to transmit the impact force to the elastic element 111 through elasticity. This causes the elastic element 111 to compress and push the U-shaped plates 112 to slide relative to each other, thereby dispersing and consuming the impact force, reducing the impact force, further cushioning, and enhancing the cushioning effect.

[0042] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A non-adhesive base connector with a buffering function, characterized in that, For connecting the implant (1) and the mounting cap (2), the mounting cap (2) is used for assembling with the crown, and has an internal cavity with a cold-welded corner, including: The sleeve base (3) is used to be installed on the implant (1) and forms a tapered self-locking with the installation cap (2); A central screw (4) is located inside the sleeve base (3) and is used to fix the sleeve base (3) onto the implant (1); The buffer assembly (11) is disposed inside the sleeve base (3); The buffer assembly (11) includes: an elastic element (111) and a U-shaped plate (112). Two U-shaped plates (112) are provided inside the sleeve base (3). The elastic element (111) is fixedly connected between the U-shaped plate (112) and the sleeve base (3). The two U-shaped plates (112) slide against each other, and a transition hole (113) is formed between the two U-shaped plates (112).

2. The non-adhesive base connector with buffering function according to claim 1, characterized in that: The sleeve base (3) is a columnar structure with an outer conical surface (7) on its top.

3. The non-adhesive base connector with buffering function according to claim 1, characterized in that: The mounting cap (2) has a through hole (10), the central screw (4) passes through the through hole (10) and is fixed on the implant (1), and the size of the transition hole (113) is larger than that of the through hole (10).

4. The adhesive-free sleeve base and connector according to claim 3, characterized in that: The mounting cap (2) has an annular groove (5) inside to enhance the tapered self-locking effect with the sleeve base (3).

5. The non-adhesive base connector with buffering function according to claim 1, characterized in that: The outer conical surface (7) at the top of the sleeve base (3) is the second cold welding angle. The sleeve base (3) and the mounting cap (2) are in an interference fit through the outer conical surface. The first cold welding angle and the second cold welding angle have the same angle and both range from 1° to 15°.

6. The adhesive-free sleeve base and connector according to claim 1, characterized in that: The central screw (4) is located at the center of the sleeve base (3).

7. The non-adhesive base connector with buffering function according to claim 1, characterized in that: The implant (1) has a screw hole (6) inside that corresponds to the central screw (4), and the screw hole (6) does not extend to the surface of the top of the sleeve base (3).

8. The non-adhesive base connector with buffering function according to claim 1, characterized in that: The implant (1) has connecting threads on its outer surface and an installation hole (9) communicating with the threaded hole inside the implant (1).

9. A non-adhesive base connector with a buffering function according to claim 2, characterized in that: The outer conical surface (7) has a directional groove (8).

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