Bonding-free abutment

Abstract

The utility model provides a bonding-free abutment, which comprises a dental crown, an abutment, a central screw and an implant, the central screw sequentially penetrates through the dental crown and the abutment from top to bottom and then is in threaded connection with the implant, an inner groove is arranged below the dental crown, a boss clamped with the inner groove is arranged inside the abutment, the boss is clamped with the inner groove and then limits the circumferential rotation of the dental crown, and the implant is connected with the abutment. And the elastic sheet arranged on the central screw is clamped with the dental crown to limit the axial up-down movement of the dental crown. According to the adhesion-free abutment disclosed by the utility model, the screw structure is improved, so that the dental crown and the abutment are tightly pressed and are mechanically connected, and the operation difficulty and the operation time are greatly reduced on the premise of ensuring higher reliability.

Description

Technical Field

[0001] This utility model belongs to the field of oral medical devices, and in particular relates to an adhesive-free abutment. Background Technology

[0002] Cemented fixation, a widely used fastening method, is characterized by its strong and reliable connection. However, this method, which uses liquid adhesive to forcibly bond the two together, has a major drawback: the amount of adhesive used cannot be perfectly controlled. To achieve the desired fastening effect, the amount of adhesive used must be more, not less, to ensure even coverage of every point where the crown and abutment meet. Otherwise, the crown cannot be guaranteed to remain in place during later use, potentially leading to more serious safety consequences. After bonding the crown to the abutment, due to the slightly excessive amount of adhesive used, some adhesive overflow is inevitable after pressing the crown firmly onto the abutment. If a central through-hole has been pre-drilled in the crown, the screw can be unscrewed, the abutment and crown removed, and the excess adhesive cleaned before reinstalling on the implant. If no through-hole has been pre-drilled, the excess adhesive must be carefully removed from the patient's mouth. Regardless of the method, the subsequent cleaning process is time-consuming and cumbersome, resulting in a poor patient experience. Utility Model Content

[0003] In view of this, the present invention aims to propose an adhesive-free abutment to solve the problem of troublesome post-treatment cleaning caused by excessive adhesive during dental treatment.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A non-adhesive abutment includes a crown, an abutment, a central screw, and an implant. The central screw passes through the crown and abutment sequentially from top to bottom and is threaded to the implant. The crown has an inner groove at its lower part, and the abutment has a boss inside that engages with the inner groove. The boss engages with the inner groove to limit the circumferential rotation of the crown. A spring on the central screw engages with the crown to limit the axial vertical movement of the crown.

[0006] Furthermore, the crown has a through hole in the middle for installing a central screw, and the inner wall of the crown is also provided with a sloping step.

[0007] Furthermore, the base includes an upper part, a middle part, and a lower part connected sequentially from top to bottom, with a boss formed between the upper part and the middle part that engages with the inner groove.

[0008] Furthermore, the inner groove is a triangular inner groove, and the boss is a triangular boss.

[0009] Furthermore, a limiting step is formed between the upper and middle parts, which is located below the boss and is used to limit the relative position of the crown and the abutment.

[0010] Furthermore, the central screw includes a body, with several spring pieces on the top of the body and an external thread on the bottom of the body. The spring pieces engage with the inclined step to limit the axial up-and-down movement of the crown.

[0011] Compared with the prior art, the adhesive-free base of this utility model has the following advantages:

[0012] (1) The adhesive-free base described in this utility model uses a modified screw structure to press the crown and the base together, which is a mechanical connection. Under the premise of ensuring strong reliability, the operation difficulty and operation time are greatly reduced.

[0013] (2) The adhesive-free abutment described in this utility model effectively solves the problem of troublesome cleaning in the later stage due to excessive adhesive during dental treatment. Attached Figure Description

[0014] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0015] Figure 1 This is a cross-sectional view of the adhesive-free base described in an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the dental crown described in an embodiment of the present invention;

[0017] Figure 3 This is a cross-sectional view of the dental crown described in an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the base as described in an embodiment of the present utility model;

[0019] Figure 5 This is a cross-sectional view of the central screw described in an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1-Crown; 11-Inner groove; 12-Beveled step; 13-Through hole; 2-Abutment; 21-Lead; 22-Middle part; 23-Upper part; 24-Lower part; 25-Limiting step; 3-Central screw; 31-Spring; 32-External thread; 4-Implant. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] A type of adhesive-free base, such as Figures 1 to 5 As shown, the device includes a crown 1, an abutment 2, a central screw 3, and an implant 4. The central screw 3 passes through the crown 1 and abutment 2 sequentially from top to bottom and is threaded into the implant 4. The crown 1 has an inner groove 11 at its lower end. The abutment 2 has a protrusion 21 inside that engages with the inner groove 11. The protrusion 21 engages with the inner groove 11 to limit the circumferential rotation of the crown 1. A spring clip 31 on the central screw 3 engages with the crown 1 to limit its axial vertical movement. This solution uses a mechanical connection instead of traditional adhesive connections. By improving the traditional crown, central screw, and abutment structure, the crown is automatically constrained in a fixed position after the central screw is tightened. Crown installation no longer requires third-party consumables or corresponding cleaning tools.

[0027] The crown 1 has a through hole 13 in the middle for installing the central screw 3, and the inner wall of the crown 1 also has a sloping step 12.

[0028] The abutment 2 includes an upper part 23, a middle part 22 and a lower part 24 connected from top to bottom. A boss 21 is formed between the upper part 23 and the middle part 22, which engages with the inner groove 11. After the boss 21 engages with the inner groove 11, it limits the circumferential rotation of the crown 1.

[0029] Preferably, the inner groove 11 is a triangular inner groove and the boss 21 is a triangular boss, which facilitates locking the circumferential rotation of the crown 1.

[0030] A limiting step 25 is also formed between the upper part 23 and the middle part 22. The limiting step 25 is located below the boss 21 and is used to limit the relative position of the crown 1 and the abutment 2.

[0031] The central screw 3 includes a body, with several spring pieces 31 on the top and external threads 32 on the bottom. The spring pieces 31 engage with the inclined step 12 to limit the axial up-and-down movement of the crown 1.

[0032] A method for using an adhesive-free base:

[0033] After the implant is successfully implanted into the alveolar bone, the lower part 24 of the abutment 2 is inserted into the groove of the implant head 4 and secured. Then, the inner groove 11 at the end of the crown 1 is also secured to the protrusion 21 of the abutment 2 to prevent circumferential rotation. The central screw 2 is screwed into the internal thread of the implant 4 through the through hole 13 of the crown 1. After the central screw 3 is tightened, the spring 31 at the head of the central screw 3 will press against the inclined step 12 of the through hole inside the crown. The axial up-and-down movement of the implant-abutment-crown is also restricted, and it is in a locked state. At this time, the abutment 2 and the crown 1 are tightly pressed onto the implant 4 and cannot move. The central through hole reserved in the crown is filled with composite resin material, and the entire operation is completed. For implant surgery, the improved abutment and matching screws greatly reduce the difficulty and time of operation, and make the mechanical connection more secure and reliable. This directly avoids the use of third-party adhesive materials and the tools needed to clean the adhesive later, innovatively simplifying the surgical process and greatly improving the patient's surgical experience.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A non-adhesive base, characterized in that: It includes a crown, abutment, central screw and implant. The central screw passes through the crown and abutment from top to bottom and is threaded to the implant. The crown has an inner groove, and the abutment has a boss that engages with the inner groove. The boss engages with the inner groove to limit the circumferential rotation of the crown. The spring on the central screw engages with the crown to limit the axial vertical movement of the crown.

2. The adhesive-free base according to claim 1, characterized in that: The crown has a through hole in the middle for installing a central screw, and the inner wall of the crown also has a sloping step.

3. The adhesive-free base according to claim 1, characterized in that: The base consists of an upper part, a middle part, and a lower part connected sequentially from top to bottom, with a boss formed between the upper part and the middle part that engages with the inner groove.

4. The adhesive-free base according to claim 3, characterized in that: The inner groove is a triangular inner groove, and the boss is a triangular boss.

5. The adhesive-free base according to claim 3, characterized in that: A limiting step is also formed between the upper and middle parts. The limiting step is located below the boss and is used to limit the relative position of the crown and abutment.

6. The adhesive-free base according to claim 2, characterized in that: The central screw includes a body, with several spring pieces on the top of the body and external threads on the bottom of the body. The spring pieces engage with the inclined step to limit the axial up-and-down movement of the crown.

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