Dresser for accurately dressing deciduous tooth preformed crown

Abstract

The utility model discloses a dresser for accurately dressing a deciduous tooth preformed crown. The dresser comprises an upper bracket and a lower bracket, the upper support is used for installing the containing support. Positioning cylinders are symmetrically arranged at the two ends of the upper support. The lower support is used for installing a supporting foundation column, the supporting foundation column is used for supporting a preformed crown, positioning columns are symmetrically arranged at the two ends of the lower support, and the positioning cylinders and the positioning columns can be fixed in an inserted mode; ratchet wheel structures are arranged in the middle of the upper support and the middle of the lower support respectively, and ratchet columns matched with the ratchet wheel structures are arranged on the containing supports and the supporting base columns; a positioning ring for connecting the positioning cylinder with the positioning column is arranged on the positioning cylinder, the positioning ring is rotationally connected to the end part of the positioning cylinder, an internal thread is arranged on the inner ring surface of the positioning ring, and an external thread is arranged on the positioning column. According to the utility model, the upper bracket and the lower bracket are combined, so that the upper bracket and the lower bracket can provide a stable operation platform for the trimming process of the preformed crown after being inserted and fixed, and the separation trend of slippage and separation between the upper bracket and the lower bracket in the trimming process of the preformed crown is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated crown production, in particular to a trimmer for accurately trimming prefabricated crowns of deciduous teeth. Background Art

[0002] Dental caries is a common disease that occurs in children's deciduous teeth. When the caries coverage of deciduous teeth is large, various types of restorations are needed to restore the appearance of the deciduous teeth and thus restore the chewing function of the affected teeth.

[0003] Prefabricated crowns are the most commonly used type of restoration for deciduous teeth. When using a prefabricated crown, the doctor needs to select a prefabricated crown of appropriate size based on the size of the target tooth, and then use scissors and a dental drill to perform personalized trimming and polishing on the edge of the prefabricated crown so that it can fit the target tooth perfectly. The above trimming and polishing process needs to be carried out according to the principle of small amounts at a time. Therefore, the doctor needs to repeatedly adjust and try on the prefabricated crown by the chair, which increases the diagnosis and treatment time.

[0004] Therefore, it is necessary to provide a trimmer for accurately trimming prefabricated crowns of deciduous teeth, so as to solve the problem of poor stability of the operating platform provided by the prefabricated crown trimmer in the prior art for the trimming process of the prefabricated crown. Utility Model Content

[0005] The utility model aims to provide a trimmer for accurately trimming preformed crowns of deciduous teeth, so as to solve the technical problems of the prior art.

[0006] In order to solve the above technical problems, the utility model specifically provides the following technical solutions:

[0007] The utility model provides a trimmer for accurately trimming prefabricated crowns of deciduous teeth, comprising: an upper bracket, which is used to install a receiving tray, the receiving tray is used to partially cover the prefabricated crown, and positioning cylinders are symmetrically provided at both ends of the upper bracket; a lower bracket, which is used to install a supporting base column, the supporting base column is used to support the prefabricated crown, and positioning columns are symmetrically provided at both ends of the lower bracket; the positioning cylinder and the positioning column can be plugged and fixed so that the prefabricated crown forms an abutment positioning between the receiving tray and the supporting base column; ratchet structures are respectively provided at the middle parts of the upper bracket and the lower bracket, and ratchet columns that match the ratchet structures are respectively provided on the receiving tray and the supporting base column, so as to limit the rotation direction of the whole composed of the receiving tray, the supporting base column and the prefabricated crown through the ratchet structure; wherein, a positioning ring for connecting it with the positioning column is provided on the positioning cylinder, and the positioning ring is rotatably connected to the end of the positioning cylinder, an internal thread is provided on the inner ring surface of the positioning ring, and an external thread is provided on the positioning column, so that the positioning ring can be screwed on the positioning column.

[0008] Furthermore, an annular limiting groove is provided on the end surface of the opening end of the positioning tube, and a limiting block is provided on the positioning ring, and the limiting block is embedded in the limiting groove to form a sliding connection.

[0009] Furthermore, the cross-sections of the limiting groove and the limiting block are both T-shaped.

[0010] Furthermore, the limit block includes a limit portion and a connecting portion, both of which are cylindrical and coaxially connected as a whole; wherein the limit portion is embedded deep inside the limit groove, the diameter of the limit portion is larger than the annular opening spacing of the limit groove, and the diameter of the connecting portion is smaller than the annular opening spacing of the limit groove.

[0011] Furthermore, one end of the positioning column is provided with a positioning boss and fixedly connected to the lower bracket; wherein, the length of the positioning column is equal to the sum of the lengths of the positioning tube and the positioning ring, and after the positioning tube and the positioning column can be plugged and fixed, the open end face of the positioning tube can be abutted against the end annular face of the positioning boss.

[0012] Furthermore, the external thread on the positioning column is arranged close to the positioning boss.

[0013] Furthermore, two limit blocks are symmetrically arranged on the positioning ring.

[0014] Furthermore, the limiting block includes a limiting portion and a connecting portion; wherein the limiting portion and the connecting portion are both cylindrical, and the limiting portion is rotatably connected to the connecting portion.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model arranges the upper bracket and the lower bracket in combination so that the two can provide a stable operating platform for the trimming process of the pre-formed crown after being plugged in and fixed. After the positioning tube and the positioning column are plugged in to each other, the upper bracket and the lower bracket are locked with each other through the screw fixing action of the positioning ring, thereby avoiding the separation tendency of slipping and falling out between the upper bracket and the lower bracket during the trimming process of the pre-formed crown, thereby ensuring the stable progress of the trimming operation of the pre-formed crown. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] Figure 1 A three-dimensional structural diagram of a trimmer for accurately trimming preformed crowns of deciduous teeth provided by the utility model in a use state;

[0019] Figure 2 for Figure 1 Exploded diagram of

[0020] Figure 3 An exploded view of the trimmer provided by the utility model in a non-use state;

[0021] Figure 4 for Figure 3 A cross-sectional view of

[0022] Figure 5 for Figure 4 Partial view of Figure Ⅰ.

[0023] Figure 6 for Figure 4 Figure Ⅰ is a partial view of another embodiment provided by the utility model.

[0024] The numbers in the figure represent the following:

[0025] 10. Upper bracket; 11. Accommodating tray; 12. Positioning cylinder; 13. Positioning ring; 14. Limiting groove; 15. Limiting block; 151. Limiting part; 152. Connecting part; 20. Lower bracket; 21. Supporting base column; 22. Positioning column; 23. Positioning boss; 30. Ratchet structure; 31. Ratchet column. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figure 1 , 2 As shown, the utility model provides a trimmer for accurately trimming prefabricated crowns of deciduous teeth, comprising:

[0028] An upper bracket 10 is used to install a receiving tray 11, and the receiving tray 11 is used to partially cover the preformed crown. Positioning cylinders 12 are symmetrically provided at both ends of the upper bracket 10;

[0029] The lower bracket 20 is used to install the supporting column 21, and the supporting column 21 is used to support the preformed crown. Positioning columns 22 are symmetrically arranged at both ends of the lower bracket 20; the positioning cylinder 12 and the positioning column 22 can be plugged and fixed, so that the preformed crown forms an abutment positioning between the receiving tray 11 and the supporting column 21; the middle parts of the upper bracket 10 and the lower bracket 20 are respectively provided with a ratchet structure 30, and the receiving tray 11 and the supporting column 21 are respectively provided with a ratchet column 31 matched with the ratchet structure 30, so that the rotation direction of the whole composed of the receiving tray 11, the supporting column 21 and the preformed crown is limited by the ratchet structure 30;

[0030] Among them, the positioning tube 12 is provided with a positioning ring 13 for connecting it with the positioning column 22. The positioning ring 13 is rotatably connected to the end of the positioning tube 12. The inner ring surface of the positioning ring 13 is provided with an internal thread, and the positioning column 22 is provided with an external thread, so that the positioning ring 13 can be screwed onto the positioning column 22.

[0031] The utility model aims to arrange the upper bracket 10 and the lower bracket 20 in combination so that the two can provide a stable operating platform for the trimming process of the pre-formed crown after being plugged in and fixed. After the positioning tube 12 and the positioning column 22 are plugged in to each other, the upper bracket 10 and the lower bracket 20 are locked with each other through the screw fixing action of the positioning ring 13, thereby avoiding the separation tendency of slipping and falling out between the upper bracket 10 and the lower bracket 20 during the trimming process of the pre-formed crown, thereby ensuring the stable progress of the trimming operation of the pre-formed crown.

[0032] Specifically, the detailed steps of trimming the preformed crown using the preformed crown trimmer provided by the utility model are as follows: first, use 3D printing technology to print out the receiving tray 11 and the supporting base column 21 that conform to the patient's dentition model, the supporting base column 21 is first installed on the lower bracket 20, the preformed crown is placed on the supporting base column 21, and the receiving tray 11 is installed on the upper bracket 10, and the positioning cylinder 12 is inserted into the positioning column 22, and then the preformed crown is partially exposed along the edge of the receiving tray 11, forming a path to be trimmed. When the lower annular surface of the positioning ring 13 contacts the external thread on the positioning column 22, the external thread forms a barrier to the downward movement of the positioning ring 13, and then the positioning ring 13 is rotated, so that the positioning cylinder 12 and the positioning column 22 are screwed and fixed as a whole, which increases the stability of the connection between the upper bracket 10 and the lower bracket 20, and is conducive to the smooth progress of the preformed crown trimming operation.

[0033] In order to form a rotational connection between the positioning ring 13 and the positioning cylinder 12, as shown in FIG. Figure 2-4 As shown, in a preferred embodiment of the utility model provided based on the above-mentioned embodiment, an annular limiting groove 14 is provided on the end face of the opening end of the positioning cylinder 12, and a limiting block 15 is provided on the positioning ring 13, and the limiting block 15 is embedded in the limiting groove 14 to form a sliding connection; the cross-sections of the limiting groove 14 and the limiting block 15 are both T-shaped.

[0034] More specifically, the limit block 15 includes a limit portion 151 and a connecting portion 152, both of which are cylindrical and coaxially connected as a whole; wherein the limit portion 151 is embedded deep inside the limit groove 14, the diameter of the limit portion 151 is larger than the annular opening spacing of the limit groove 14, and the diameter of the connecting portion 152 is smaller than the annular opening spacing of the limit groove 14; two limit blocks 15 are symmetrically arranged on the positioning ring 13.

[0035] In this embodiment, in order to facilitate the single-person action of medical staff during the trimming operation, the combination of the positioning ring 13 and the limit block 15 can be set on the positioning cylinder 12 on one side, and the positioning cylinder 12 on the other side is only connected to the positioning column 22 by plugging. When the medical staff operates, they can rotate the positioning ring 13 on one side to screw it into the external thread on the positioning column 22, so as to form a stable connection between the upper bracket 10 and the lower bracket 20, without the medical staff having to rotate the two positioning rings 13 at the same time to lock the upper bracket 10 and the lower bracket 20.

[0036] In order to limit the insertion end point of the positioning tube 12, as Figure 1-3 As shown, in a preferred embodiment provided by the utility model based on the above-mentioned embodiment, a positioning boss 23 is provided at one end of the positioning column 22 and is fixedly connected to the lower bracket 20; wherein, the length of the positioning column 22 is equal to the sum of the lengths of the positioning tube 12 and the positioning ring 13, and after the positioning tube 12 and the positioning column 22 can be plugged and fixed, the open end face of the positioning tube 12 can be abutted against the end annular face of the positioning boss 23.

[0037] More specifically, the external thread on the positioning column 22 is disposed close to the positioning boss 23 .

[0038] In this embodiment, the positioning boss 23 is provided to limit the insertion end point of the positioning tube 12, thereby preventing the positioning ring 13 from being disengaged from the external thread on the positioning column 22 after being rotated, thereby rendering the locking effect ineffective.

[0039] In order to reduce the resistance of the positioning ring 13 when it rotates relative to the positioning cylinder 12, as shown in FIG. Figure 4 , 6 As shown, in a preferred embodiment of the present invention based on the above embodiments, the limit block 15 includes a limit portion 151 and a connecting portion 152; wherein the limit portion 151 and the connecting portion 152 are both cylindrical, and the limit portion 151 is rotatably connected to the connecting portion 152.

[0040] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A trimmer for accurately trimming prefabricated crowns of deciduous teeth, characterized in that: include: An upper bracket (10) is used to install a receiving tray (11), wherein the receiving tray (11) is used to partially cover the preformed crown, and positioning cylinders (12) are symmetrically provided at both ends of the upper bracket (10); A lower bracket (20) is used to install a supporting column (21), wherein the supporting column (21) is used to support the preformed crown, and positioning columns (22) are symmetrically provided at both ends of the lower bracket (20); The positioning cylinder (12) and the positioning column (22) can be plugged and fixed so that the preformed crown is abutted and positioned between the receiving tray (11) and the supporting base column (21); The middle parts of the upper bracket (10) and the lower bracket (20) are respectively provided with ratchet structures (30), and the accommodating tray (11) and the supporting base column (21) are respectively provided with ratchet columns (31) matched with the ratchet structures (30), so that the rotation direction of the whole composed of the accommodating tray (11), the supporting base column (21) and the preformed crown can be limited by the ratchet structure (30); The positioning tube (12) is provided with a positioning ring (13) for connecting it with the positioning column (22); the positioning ring (13) is rotatably connected to the end of the positioning tube (12); an inner ring surface of the positioning ring (13) is provided with an internal thread; and the positioning column (22) is provided with an external thread, so that the positioning ring (13) can be screwed onto the positioning column (22).

2. A trimmer for accurately trimming prefabricated crowns of deciduous teeth according to claim 1, characterized in that: An annular limiting groove (14) is provided on the open end surface of the positioning tube (12), and a limiting block (15) is provided on the positioning ring (13). The limiting block (15) is embedded in the limiting groove (14) to form a sliding connection.

3. A trimmer for accurately trimming prefabricated crowns of deciduous teeth according to claim 2, characterized in that: The cross sections of the limiting groove (14) and the limiting block (15) are both T-shaped.

4. A trimmer for accurately trimming prefabricated crowns of deciduous teeth according to claim 3, characterized in that: The limiting block (15) comprises a limiting portion (151) and a connecting portion (152); the limiting portion (151) and the connecting portion (152) are both cylindrical and coaxially connected in one piece; The limiting portion (151) is embedded deep inside the limiting groove (14), the diameter of the limiting portion (151) is larger than the annular opening spacing of the limiting groove (14), and the diameter of the connecting portion (152) is smaller than the annular opening spacing of the limiting groove (14).

5. A trimmer for accurately trimming prefabricated crowns of deciduous teeth according to claim 4, characterized in that: One end of the positioning column (22) is provided with a positioning boss (23) which is fixedly connected to the lower bracket (20); The length of the positioning column (22) is equal to the sum of the lengths of the positioning tube (12) and the positioning ring (13); after the positioning tube (12) and the positioning column (22) are plugged in and fixed, the open end surface of the positioning tube (12) can abut against the end annular surface of the positioning boss (23).

6. A trimmer for accurately trimming prefabricated crowns of deciduous teeth according to claim 5, characterized in that: The external thread on the positioning column (22) is arranged close to the positioning boss (23).

7. A trimmer for accurately trimming prefabricated crowns of deciduous teeth according to claim 6, characterized in that: Two limit blocks (15) are symmetrically arranged on the positioning ring (13).

8. The trimmer for accurately trimming prefabricated crowns of deciduous teeth according to claim 3, characterized in that: The limiting block (15) comprises a limiting portion (151) and a connecting portion (152); The limiting portion (151) and the connecting portion (152) are both cylindrical, and the limiting portion (151) is rotatably connected to the connecting portion (152).

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