A telescopic crown and production method thereof

Abstract

The present application discloses a telescopic crown and a production method thereof, which relates to the field of dentures, and includes an inner crown and an outer crown, wherein the outer crown is nested on the inner crown, a first groove is formed along the surface of the outer crown, a friction piece is arranged inside the outer crown, the friction piece is inserted into the first groove, a second groove is formed along the surface of the outer crown, the inner crown is inserted into the second groove, the first groove and the second groove are interconnected, a screw is arranged inside the friction piece, a deformation groove is opened inside the friction piece, when the screw is tightened in the friction piece, one side of the friction piece is deformed through the deformation groove and pressed against the inner crown. The present application screws the screw into the friction piece, and under the action of the deformation groove, one side of the friction piece is deformed and pressed against the inner crown, so that the connection between the outer crown and the inner crown is tighter, which is convenient for avoiding the loosening of the telescopic crown, ensuring the good sealing of the telescopic crown, and thus ensuring the use effect of the telescopic crown by the patient.

Description

Technical Field

[0001] The present application relates to the field of dentures, and in particular to a telescopic crown and a production method thereof. Background Art

[0002] A telescopic crown is a double-layer crown with high fit. The inner crown is bonded to the abutment tooth and the outer crown is placed inside the denture. The friction generated by the fit between the inner and outer crowns keeps the denture in place.

[0003] The telescopic crown includes an inner crown and an outer crown. The inner crown is inserted into the outer crown. After the telescopic crown is used for a long time, the inner crown and the outer crown are prone to loosening, resulting in poor sealing of the telescopic crown, easy accumulation of fluid and severe wear, which in turn affects the patient's use of the telescopic crown. Summary of the invention

[0004] In order to solve the problem of looseness between the inner crown and the outer crown, the present application provides a telescopic crown and a production method thereof.

[0005] In the first aspect, the present application provides a telescopic crown adopting the following technical solution:

[0006] A sleeve crown comprises an inner crown and an outer crown, wherein the outer crown is nested on the inner crown, a first groove is formed along the surface of the outer crown, a friction piece is arranged inside the outer crown, the friction piece is inserted into the first groove, a second groove is formed along the surface of the outer crown, the inner crown is inserted into the second groove, the first groove and the second groove are connected to each other, a screw is arranged inside the friction piece, a deformation groove is opened inside the friction piece, when the screw is tightened in the friction piece, one side of the friction piece is deformed through the deformation groove and presses against the inner crown.

[0007] By adopting the above technical solution, the screw is screwed into the friction part, and under the action of the deformation groove, one side of the friction part is deformed and pressed against the inner crown, so that the connection between the outer crown and the inner crown is tighter, which makes it easier to avoid loosening of the sleeve crown, ensures good sealing of the sleeve crown, and further guarantees the patient's use effect of the sleeve crown.

[0008] Preferably, the friction member comprises a cylinder and a clamping block, the cylinder and the clamping block are integrally formed, the screw is arranged in the cylinder, the deformation groove is located at the connection between the cylinder and the clamping block, and the end of the clamping block is deformed.

[0009] By adopting the above technical solution, the screw is screwed into the cylinder, and the deformation groove is located at the connection between the cylinder and the clamping block, so that the screw can push the end of the clamping block to deform, thereby making the clamping block clamp the inner crown.

[0010] Preferably, an open groove is formed on the side wall of the cylinder away from the abutting block along the height direction of the cylinder.

[0011] By adopting the above technical solution, the open groove on the side wall of the cylinder facilitates the friction member to be inserted into the first groove of the outer crown.

[0012] Preferably, the screw includes a nail rod and a nail head, the nail rod thread is arranged in a cylinder, a push groove is provided on the cylinder and the tightening block, the nail head is inserted in the push groove, the inner diameter of the push groove gradually increases from the nail rod to the nail head, and the diameter of the nail head gradually increases in the direction away from the nail rod.

[0013] By adopting the above technical solution, after the screw is screwed into the cylinder, the nail head enters the push groove, the diameter of the nail head gradually increases, and the inner diameter of the push groove gradually increases, so that the nail head can push the end of the tightening block to deform.

[0014] Preferably, the outer peripheral side of the cylinder away from the nail head side wall is provided with a rounded corner.

[0015] By adopting the above technical solution, the rounded corners on the cylinder facilitate the friction member to be inserted into the first groove of the outer crown.

[0016] Preferably, the friction member is symmetrically divided into a first friction body and a second friction body along the midline, a first chamfer is provided on a side of the first friction body close to the nail head, a second chamfer is provided on a side of the second friction body away from the nail head, the first friction body is inserted into the first groove of the outer crown, and the second friction body is inserted into the first groove of the outer crown through the first chamfer.

[0017] By adopting the above technical solution, the first friction body and the second friction body are detachably arranged, the first friction body is first inserted into the first groove, and then the second friction body is inserted into the first groove. The first chamfer on the first friction body and the second chamfer on the second friction body facilitate the insertion of the second friction body into the first groove, thereby facilitating the insertion of the friction member into the first groove.

[0018] Preferably, a convex strip is provided on the side wall of the first friction body close to the second friction body and located away from the first chamfer. When the second friction body is inserted into the first groove, the convex strip abuts against the second chamfer.

[0019] By adopting the above technical solution, when the second friction member is inserted into the first groove, the convex strip fills the gap at the second chamfer, so that the tightening effect between the friction member and the inner crown is not easily reduced.

[0020] In the second aspect, the present application provides a telescopic crown production method using the following technical solution:

[0021] A method for producing a telescopic crown, using the above-mentioned telescopic crown, comprises the following steps: S1: the inner crown is bonded and fixed on the tooth, an undercut wax is placed on the alveolar ridge, a replacement part is placed on the undercut wax, and the replacement part is positioned so that the replacement part and the inner crown are completely fitted together; S2: model resin is covered on the replacement part and the inner crown and an outer crown is made; S3: a tool is used to pull the replacement part out of the resin outer crown; S4: a friction part is placed in the manufactured outer crown, the friction part and the replacement part have the same size, a screw is screwed into the friction part and the friction part is deformed; S5: the outer crown is mounted on the inner crown, and the deformed part of the friction part is pressed against the inner crown.

[0022] By adopting the above technical solution, the use of replacement parts makes it easier for operators to adjust the size, and the use of friction parts and deformation by screwing screws into the friction parts. At this time, one side of the friction part can be pressed against the side wall of the inner crown, so that the outer crown and the inner crown fit tightly, avoiding looseness of the sleeve crown, improving the sealing of the sleeve crown, and thereby ensuring the patient's use effect of the sleeve crown.

[0023] Preferably, in step S3: a threaded hole is formed at the end of the replacement part, a threaded head is formed at the end of the tool, the threaded head of the tool is screwed into the threaded hole of the replacement part, and then the replacement part is pulled out by the tool.

[0024] By adopting the above technical solution, a threaded hole is provided in the replacement part, and a tool with a threaded head is used to facilitate cooperation with the threaded hole, so that the replacement part can be quickly pulled out.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. Screw the screw into the friction part. Under the action of the deformation groove, one side of the friction part is deformed and pressed against the inner crown, so that the connection between the outer crown and the inner crown is tighter, which is convenient for preventing the loosening of the telescopic crown, ensuring the good sealing of the telescopic crown, and thus ensuring the use effect of the telescopic crown for patients;

[0027] 2. By screwing the screw into the cylinder, the deformation groove is located at the connection between the cylinder and the abutment block, so that the screw can push the end of the abutment block to deform, thereby making the abutment block abut against the inner crown;

[0028] 3. After the screw is screwed into the cylinder, the nail head enters the push groove, the diameter of the nail head gradually increases, and the inner diameter of the push groove gradually increases, so that the nail head can push the end of the tightening block to deform. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the overall structure of a telescopic crown in Example 1 of the present application;

[0030] Figure 2This is a cross-sectional view of the overall structure of a telescopic crown in Example 1 of the present application;

[0031] Figure 3 This is an exploded view of a partial structure of a telescopic crown in Example 1 of the present application;

[0032] Figure 4 This is a partial structural schematic diagram of a telescopic crown in Example 2 of the present application;

[0033] Figure 5 This is an exploded view of a partial structure of a telescopic crown in Example 3 of the present application;

[0034] Figure 6 This is a flow chart of a telescopic crown production method in Example 4 of the present application;

[0035] Figure 7 This is a structural schematic diagram of step S1 of a telescopic crown production method in Example 4 of the present application;

[0036] Figure 8 This is a structural schematic diagram of step S2 of a telescopic crown production method in Example 4 of the present application;

[0037] Fig. 9 This is a structural schematic diagram of step S3 of a telescopic crown production method in Example 4 of the present application.

[0038] Figure numerals: 1. inner crown; 2. outer crown; 3. first groove; 4. second groove; 5. friction member; 51. cylinder; 52. tightening block; 53. first friction body; 54. second friction body; 6. screw; 61. nail head; 62. nail rod; 7. deformation groove; 8. opening groove; 9. push groove; 10. first chamfer; 11. second chamfer; 12. rounded corner; 13. convex strip; 14. concave wax; 15. replacement part. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-Figure 9 This application is described in further detail.

[0040] Embodiment 1:

[0041] The embodiment of the present application discloses a telescopic crown.

[0042] Reference Figure 1 and Figure 2 A sleeve crown comprises an inner crown 1 and an outer crown 2. A second groove 4 is formed along the surface of the outer crown 2 close to the inner crown 1. The inner crown 1 is inserted into the second groove 4. The outer wall of the inner crown 1 abuts against the inner wall of the outer crown 2 through the second groove 4.

[0043] Reference Figure 2 and Figure 3A first groove 3 is formed along the surface of the outer crown 2 away from the inner crown 1, and the first groove 3 is connected to the second groove 4. The outer crown 2 is located in the first groove 3 and a friction member 5 is detachably installed. The friction member 5 includes a cylinder 51 and a tightening block 52. The cylinder 51 and the tightening block 52 are integrally formed. The tightening block 52 is a rectangular parallelepiped. A screw 6 is detachably installed in the cylinder 51, and a push groove 9 is provided on the cylinder 51 and the tightening block 52.

[0044] The screw 6 includes a nail head 61 and a nail rod 62. The top wall of the nail head 61 is provided with a slotted groove along its diameter direction. The diameter of the nail head 61 gradually increases in the direction away from the nail rod 62. The inner diameter of the push groove 9 gradually increases in the direction from the nail rod 62 to the nail head 61. The nail head 61 is inserted into the push groove 9. The side wall of the nail head 61 abuts against the inner side walls of the cylinder 51 and the abutting block 52 through the push groove 9. The nail rod 62 is formed with an external thread. The nail rod 62 is threadedly installed in the cylinder 51. The outer side wall of the nail rod 62 fits with the inner side wall of the cylinder 51.

[0045] Two deformation grooves 7 are provided in the friction member 5, and the two deformation grooves 7 are located on opposite sides of the push groove 9, and the deformation grooves 7 are located at the connection between the cylinder 51 and the abutting block 52. When the screw 6 is tightened in the friction member 5 in the clockwise direction, the nail head 61 presses the abutting block 52 through the push groove 9, and the end of the abutting block 52 is deformed through the deformation groove 7, so that the end of the friction member 5 close to the inner crown 1 is pressed against the side wall of the inner crown 1, avoiding the generation of gaps and enhancing the sealing of the sleeve crown; when the screw 6 is loosened in the friction member 5 in the counterclockwise direction, the deformation of the end of the abutting block 52 in the friction member 5 is reduced, thereby reducing the friction between the abutting block 52 and the inner crown 1, so that the tightness of the outer crown 2 installed on the inner crown 1 can be adjusted.

[0046] An opening groove 8 is provided on the side wall of the cylindrical body 51 of the friction member 5 away from the abutting block 52 along its height direction, and two opening grooves are symmetrically provided on the opening side, so as to facilitate the friction member 5 to be inserted into the first groove 3 of the outer crown 2. This makes the connection between the friction member 5 and the inner crown 1 tighter, thereby ensuring good sealing of the sleeve crown and avoiding looseness.

[0047] The implementation principle of a telescopic crown in an embodiment of the present application is as follows: when the screw 6 is tightened in a clockwise direction and enters the friction part 5, the side wall of the friction part 5 close to the inner crown 1 will be deformed through the deformation groove 7, and at the same time, press against the inner crown 1, so that the connection between the outer crown 2 and the inner crown 1 is tighter, which is convenient for enhancing the sealing of the telescopic crown and preventing the telescopic crown from loosening due to increased use time; when the screw 6 is loosened in a counterclockwise direction and exits the friction part 5, a gap will be generated between the side wall of the friction part 5 close to the inner crown 1 and the inner crown 1, which is convenient for medical personnel to adjust and replace, thereby ensuring the patient's use effect and comfort of the telescopic crown.

[0048] Embodiment 2:

[0049] Reference Figure 4 The difference between this embodiment and the first embodiment is that a rounded corner 12 is formed on the outer peripheral side of the cylinder 51 away from the side wall of the nail head 61. The rounded corner 12 on the cylinder 51 facilitates the friction member 5 to be inserted into the first groove 3 of the outer crown 2.

[0050] Embodiment 3:

[0051] Reference Figure 5 The difference between this embodiment and the second embodiment is that the friction member 5 is symmetrically divided into a first friction body 53 and a second friction body 54 along its midline position, a first chamfer 10 is formed on the side of the first friction body 53 close to the nail head 61 and the second friction body 54, and a second chamfer 11 is formed on the side of the second friction body 54 away from the nail head 61 and close to the first friction body 53. A convex strip 13 is fixedly installed on the side of the first friction body 53 away from the nail head 61 and close to the second friction body 54, and the convex strip 13 is located on the side wall close to the second friction body 54 and away from the first chamfer 10.

[0052] When installing the friction member 5, first insert the first friction body 53 into the first groove 3, and then insert the second friction body 54 into the first groove 3. During the insertion of the second friction body 54, the second chamfer 11 at the bottom of the second friction body 54 contacts the first chamfer 10 at the top of the first friction body 53, so that the bottom of the second friction body 54 is first inserted into the first groove 3. Then, the second friction body 54 is pressed downward, and the second friction body 54 can be quickly installed in the first groove 3, so as to facilitate the installation of the friction member 5. When the second friction body 54 is fully inserted into the first groove 3, the second chamfer 11 of the second friction body 54 abuts against the convex strip 13 of the first friction body 53, and the two fit each other, so that the tightening effect of the deformation end of the tightening block 52 will not be affected.

[0053] Embodiment 4:

[0054] The embodiment of the present application discloses a method for producing a telescopic crown.

[0055] Reference Figure 6 A telescopic crown production method is used to produce the above-mentioned telescopic crown, comprising the following steps:

[0056] Reference Figure 7 S1: making an inner crown 1, bonding and fixing the inner crown 1 on the tooth, placing an undercut wax 14 on the alveolar ridge, placing a replacement part 15 on the undercut wax 14, adjusting the position of the replacement part 15, and positioning the replacement part 15 so that the side wall of the replacement part 15 is completely in close contact with the side wall of the inner crown 1;

[0057] Reference Figure 8, S2: Covering the model resin on the substitute part 15 and the inner crown 1 and making the outer crown 2;

[0058] Reference Fig. 9 S3: Use a tool to pull out the replacement part 15 from the resin crown 2. A threaded hole is formed at the end of the replacement part 15. A threaded head is formed at the end of the tool. The threaded head of the tool is screwed into the threaded hole of the replacement part 15. Then, the replacement part 15 is pulled out by the tool. At this time, the groove where the replacement part 15 is pulled out is the first groove 3.

[0059] Reference Figure 1 S4: placing a friction member 5 in the first groove 3 of the manufactured outer crown 2, wherein the friction member 5 has the same size as the replacement member 15, screwing a screw 6 into the friction member 5 to deform the friction member 5;

[0060] S5: Install the outer crown 2 on the inner crown 1, and the deformed part of the friction part 5 presses against the inner crown 1, so that the inner wall of the outer crown 2 fits tightly with the outer wall of the inner crown 1, so as to avoid the loosening of the sleeve crown, ensure the good sealing of the sleeve crown, and further ensure the use effect of the sleeve crown for the patient.

[0061] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A telescopic crown, comprising an inner crown (1) and an outer crown (2), wherein the outer crown (2) is nested on the inner crown (1), characterized in that: The outer crown (2) is provided with a first groove (3) along the surface, and a friction member (5) is arranged inside the outer crown (2). The friction member (5) is inserted into the first groove (3). The outer crown (2) is provided with a second groove (4) along the surface, and the inner crown (1) is inserted into the second groove (4). The first groove (3) and the second groove (4) are connected to each other. A screw (6) is arranged inside the friction member (5), and a deformation groove (7) is opened inside the friction member (5). When the screw (6) is tightened in the friction member (5), one side of the friction member (5) is deformed through the deformation groove (7) and pressed against the inner crown (1).

2. A telescopic crown according to claim 1, characterized in that: The friction member (5) comprises a cylinder (51) and a pressing block (52); the cylinder (51) and the pressing block (52) are integrally formed; the screw (6) is arranged in the cylinder (51); the deformation groove (7) is located at the connection between the cylinder (51) and the pressing block (52); and the end of the pressing block (52) is deformed.

3. A telescopic crown according to claim 2, characterized in that: An opening groove (8) is provided on the side wall of the cylinder (51) away from the abutting block (52) along its own height direction.

4. A telescopic crown according to claim 2, characterized in that: The screw (6) comprises a nail rod (62) and a nail head (61); the nail rod (62) is threadedly arranged in a cylindrical body (51); a push groove (9) is provided on the cylindrical body (51) and the abutting block (52); the nail head (61) is inserted into the push groove (9); the inner diameter of the push groove (9) gradually increases from the nail rod (62) to the nail head (61); and the diameter of the nail head (61) gradually increases in a direction away from the nail rod (62).

5. A telescopic crown according to claim 4, characterized in that: The outer peripheral side of the cylindrical body (51) away from the side wall of the nail head (61) is provided with a rounded corner (12).

6. A telescopic crown according to claim 4, characterized in that: The friction member (5) is symmetrically divided into a first friction body (53) and a second friction body (54) along a midline; a first chamfer (10) is provided on a side of the first friction body (53) close to the nail head (61); a second chamfer (11) is provided on a side of the second friction body (54) away from the nail head (61); the first friction body (53) is inserted into a first groove (3) of the outer crown (2); and the second friction body (54) is inserted into the first groove (3) of the outer crown (2) through the first chamfer (10).

7. A telescopic crown according to claim 6, characterized in that: A convex strip (13) is provided on the side wall of the first friction body (53) close to the second friction body (54) and located away from the first chamfer (10); when the second friction body (54) is inserted into the first groove (3), the convex strip (13) abuts against the second chamfer (11).

8. A method for producing a telescopic crown, characterized in that: The method for producing a telescopic crown according to any one of claims 1 to 7 comprises the following steps: S1: The inner crown (1) is bonded to the tooth, the undercut wax (14) is placed on the alveolar ridge, and the replacement part (15) is placed on the tooth. Place the replacement part (15) on the concave wax (14) and position the replacement part (15) so that the replacement part (15) and the inner crown (1) are completely fitted together; S2: Covering the model resin on the substitute part (15) and the inner crown (1) and making the outer crown (2); S3: Use a tool to pull the replacement part (15) out of the resin outer crown (2); S4: placing a friction member (5) into the manufactured outer crown (2), wherein the friction member (5) has the same size as the replacement member (15), screwing a screw (6) into the friction member (5) and causing the friction member (5) to deform; S5: The outer crown (2) is mounted on the inner crown (1), and the deformed part of the friction member (5) is pressed against the inner crown (1).

9. A telescopic crown production method according to claim 8, characterized in that: In step S3: a threaded hole is formed at the end of the replacement part (15), a threaded head is formed at the end of the tool, the threaded head of the tool is screwed into the threaded hole of the replacement part (15), and then the replacement part (15) is pulled out by the tool.

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