Tungsten steel tooth preparation repair machine needle

Abstract

The utility model discloses a tungsten steel tooth preparation and repair bur, and relates to the technical field of dental bur. A tungsten steel tooth preparation repair bur comprises a handle part and further comprises a connecting part integrally formed with the handle part. The avoiding part and the connecting part are integrally formed; according to the cutting edge head part, the length of the cutting edge head part is reduced, so that the diameter difference between the sections of the two ends of the cutting edge head part is small, after the diameters of the sections of the two ends of the cutting edge head part are reduced, the length of the working end of the machine needle is correspondingly reduced, and then the cutting edge head part is suitable for being used by a patient with a small mouth opening degree; the cutting edge is provided with more cutting edges at one end, far away from the avoiding part, of the edge head part, and compared with the prior art, the contact area can be increased, so that the cutting efficiency is effectively improved; and the needle is arranged, so that the service life is longer, and the gingival papilla is protected when the tooth body of the back tooth is prepared.

Description

Technical Field

[0001] The utility model belongs to the technical field of dental turning needles, in particular to a tungsten steel tooth preparation and restoration turning needle. Background Art

[0002] In the oral restoration industry, tungsten steel needles used by dentists in surgical operations are used to remove caries or old fillings on patients' teeth; its operation is carried out in the patient's mouth, and the performance and reliability of the needle products are self-evident;

[0003] In the prior art, the authorization announcement number is: CN209018983U, the authorization announcement date is: 2019.06.25, and the name is a dental bur, including a blade portion and a handle portion, the diameter of the handle portion is larger than the diameter of the blade portion, and a reinforced connecting section is provided between the blade portion and the handle portion, and the surface of the reinforced connecting section is provided with a continuous air avoidance structure in the shape of an arc surface, and the number of cutting edges of the blade portion is greater than 6. The dental bur provided by the utility model increases the number of end teeth and cutting edges to reduce the force on a single tooth. Under the same cutting conditions, the force on a single tooth can be reduced to 75% or less of the original; at the same time, it is connected to the blade portion with a large arc air avoidance structure, and the diameters of the blade portion and the reinforced connecting section have no sudden changes, which can avoid stress concentration, thereby ensuring the observation space of the dental bur and enhancing the rigidity of the dental bur, significantly reducing the rate of blade breakage during product use, and having good safety and reliability;

[0004] Although the above patent can improve safety performance and avoid breakage of the needle, the needle is too long and cannot be used for patients with a small mouth opening. In addition, the cutting edge design of the needle in the above patent has a poor cutting effect during actual use. For this reason, we propose a tungsten steel tooth preparation and restoration needle. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a tungsten steel tooth preparation and restoration needle which can overcome the above problems or at least partially solve the above problems.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is: a tungsten steel tooth preparation and restoration needle, including a handle, and also including: a connecting part integrally formed with the handle; an avoidance part integrally formed with the connecting part; a cutting head part integrally formed with the avoidance part, a plurality of cutting grooves are opened on the circumference of the outer circumference of the cutting head part, so that a plurality of cutting edges are formed on the outer circumferential surface of the cutting head part, and the cutting grooves pass through both ends of the cutting head part; the cross-sectional area of ​​the cutting head part gradually decreases in the direction away from the avoidance part, the outer circumferential diameter of the avoidance part is smaller than the cross-sectional diameter of one end of the cutting head part close to the avoidance part, the end of the cutting head part connected to the avoidance part is provided with a planar material stripping part, and the end of the cutting head part away from the avoidance part is provided with a bladeless planar part.

[0007] Preferably, the end of the connecting portion away from the handle is gradually narrowed.

[0008] Preferably, the avoidance portion is cylindrical.

[0009] Preferably, the cutting edge portion is conical.

[0010] Preferably, the number of the cutting grooves is 10-20.

[0011] Furthermore, an annular groove is provided on the outer periphery of the middle portion of the blade head, and the number of the annular groove is one.

[0012] Furthermore, three annular grooves are provided on the outer circumference of the blade head.

[0013] Furthermore, the three annular grooves are located on the outer circumference of the cutting edge and have the same depth.

[0014] Furthermore, the depth of the annular groove is 70%-85% of the depth of the cutting groove.

[0015] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art: the blade head in the utility model reduces the length of the blade head so that the difference in cross-sectional diameters at both ends of the blade head is smaller. When the cross-sectional diameters at both ends of the blade head are reduced, the length of the working end of the needle will also be reduced accordingly, so that it can be suitable for patients with a smaller mouth opening. When the cross-sectional diameters at both ends of the blade head are reduced, the cutting edge has more cutting edges on the end of the blade head away from the avoidance portion, which can increase the contact area compared with the prior art, thereby effectively improving the cutting efficiency; and the setting of the needle also has a longer service life and is protective of the gingival papilla when preparing the posterior teeth.

[0016] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the attached picture:

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a tungsten steel tooth preparation and restoration needle proposed by the utility model;

[0019] Figure 2 This is a schematic structural diagram of the blade head of a tungsten steel tooth preparation and restoration needle proposed in the utility model;

[0020] Figure 3 A schematic diagram of the structure of the annular groove of a tungsten steel tooth preparation and restoration needle proposed in the utility model Figure 1 ;

[0021] Figure 4 A schematic diagram of the structure of the annular groove of a tungsten steel tooth preparation and restoration needle proposed in the utility model Figure 2 ;

[0022] Figure 5 The utility model provides a schematic structural diagram of the bladeless flat surface portion of a tungsten steel tooth preparation and restoration needle.

[0023] In the figure: 1, handle; 11, connecting part; 12, avoidance part; 13, blade head; 131, cutting groove; 132, cutting edge; 14, annular groove; 15, plane material withdrawal part; 16, bladeless plane part. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0025] Example 1: Reference Figure 1-Figure 5 A tungsten steel tooth preparation and restoration needle comprises a handle 1, and further comprises: a connecting portion 11 integrally formed with the handle 1; an avoidance portion 12 integrally formed with the connecting portion 11; a cutting head portion 13 integrally formed with the avoidance portion 12, a plurality of cutting grooves 131 are provided on the circumference of the outer circumference of the cutting head portion 13, so that a plurality of cutting edges 132 are formed on the outer circumferential surface of the cutting head portion 13, and the cutting grooves 131 pass through both ends of the cutting head portion 13; the cross-sectional area of ​​the cutting head portion 13 gradually decreases in a direction away from the avoidance portion 12, the cutting head portion 13 is conical, the outer circumferential diameter of the avoidance portion 12 is smaller than the cross-sectional diameter of the cutting head portion 13 at one end close to the avoidance portion 12, a plane stripping portion 15 is provided at one end of the cutting head portion 13 connected to the avoidance portion 12, and a bladeless plane portion 16 is provided at one end of the cutting head portion 13 away from the avoidance portion 12;

[0026] When the present needle is used, the length of the blade head 13 is reduced so that the difference in cross-sectional diameters at both ends of the blade head 13 is small. Compared with the prior art, when the cross-sectional diameters at both ends of the blade head 13 are reduced, the length of the working end of the needle is also reduced accordingly, so that the needle can be used by patients with a smaller mouth opening.

[0027] When the cross-sectional diameters of both ends of the blade head 13 are reduced, the cutting edges 132 have more cutting edges 132 on the end of the blade head 13 away from the avoidance portion 12, which can increase the contact area compared to the prior art, thereby effectively improving the cutting efficiency;

[0028] The end of the blade head 13 away from the avoidance portion 12 is configured as a blade-free flat surface portion 16, which can avoid damage caused by accidental collision.

[0029] The flat material removal portion 15 at the connection between the cutting head portion 13 and the avoidance portion 12 can effectively discharge foreign matter in the cutting groove 131, thereby avoiding the problem of clogging of the cutting groove 131 during chip removal.

[0030] The end of the connecting portion 11 away from the handle 1 is gradually narrowed; the avoiding portion 12 is cylindrical; the setting of the connecting portion 11 and the avoiding portion 12 can avoid affecting the doctor's line of sight, and ensure the strength of the needle to avoid breakage during use.

[0031] The number of the cutting grooves 131 is 10-20. Under the same size of the cutting head 13, the number of the cutting grooves 131 determines the width of the cutting edge 132, and further affects the surface roughness of the cut object after cutting. Therefore, the number of the cutting grooves 131 can be set according to actual needs and is not limited here.

[0032] In this embodiment, the number of the cutting grooves 131 is preferably 18, which can provide better surface roughness.

[0033] Embodiment 2:

[0034] Reference Figure 3 , a tungsten steel tooth preparation and restoration needle, which is basically the same as the embodiment 1, and further: an annular groove 14 is opened on the outer periphery of the middle part of the blade head 13, and the number of the annular groove 14 is one;

[0035] The provision of the annular groove 14 can provide more material withdrawal space for the cutting head 13, thereby preventing cutting foreign matter from being stuck in the cutting groove 131, resulting in a decrease in cutting performance;

[0036] Secondly, the provision of the annular groove 14 can also increase the area of ​​the cutting edge 132, further improving the cutting performance.

[0037] Embodiment 3:

[0038] Reference Figure 4 , a tungsten steel tooth preparation and restoration needle, which is basically the same as the embodiment 1, and further: three annular grooves 14 are provided on the outer periphery of the cutting head 13; the provision of the three annular grooves 14 can increase the chip removal effect of the cutting groove 131 and improve the cutting performance;

[0039] The three annular grooves 14 are located on the outer periphery of the blade head 13 at the same depth; the depth of the annular groove 14 is 70%-85% of the depth of the cutting groove 131. This enables the cutting edge 132 to have a certain height in the annular groove 14 after the annular groove 14 is opened on the outer periphery of the blade head 13, so that the annular groove 14 also has a cutting function, further improving the practical convenience.

[0040] In addition, this needle can be used not only for dental surgery, but also for laboratories, metal jewelry processing, jade, wood art and other carving places;

[0041] Therefore, the blade head 13 in the utility model reduces the length of the blade head 13 so that the difference in cross-sectional diameters at both ends of the blade head 13 is smaller. When the cross-sectional diameters at both ends of the blade head 13 are reduced, the length of the working end of the needle will also be reduced accordingly, so that it can be suitable for patients with a smaller mouth opening. When the cross-sectional diameters at both ends of the blade head 13 are reduced, the cutting edges 132 have more cutting edges 132 on the end of the blade head 13 away from the avoidance portion 12, which can increase the contact area compared to the prior art, thereby effectively improving the cutting efficiency; and the setting of the needle also has a longer service life and is protective of the gingival papilla when preparing the posterior tooth body.

[0042] The above is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the present invention can make some changes or modifications to equivalent embodiments of equivalent changes using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the present invention.

Claims

1. A tungsten steel tooth preparation and restoration needle, comprising a handle (1), characterized in that: Also includes: a connecting portion (11) formed integrally with the handle (1); an avoidance portion (12) formed integrally with the connecting portion (11); A cutting blade head (13) integrally formed with the avoidance portion (12), wherein a plurality of cutting grooves (131) are provided on the circumference of the outer circumference of the cutting blade head (13), so that a plurality of cutting edges (132) are formed on the outer circumferential surface of the cutting blade head (13), and the cutting grooves (131) penetrate through both ends of the cutting blade head (13); The cross-sectional area of ​​the cutting edge portion (13) gradually decreases in a direction away from the avoidance portion (12); the outer diameter of the avoidance portion (12) is smaller than the cross-sectional diameter of the cutting edge portion (13) at one end close to the avoidance portion (12); a plane material stripping portion (15) is provided at one end of the cutting edge portion (13) connected to the avoidance portion (12); and a bladeless plane portion (16) is provided at one end of the cutting edge portion (13) away from the avoidance portion (12).

2. A tungsten steel tooth preparation and restoration needle according to claim 1, characterized in that: The end of the connecting portion (11) away from the handle (1) is gradually reduced in size.

3. A tungsten steel tooth preparation and restoration needle according to claim 2, characterized in that: The avoidance portion (12) is cylindrical.

4. A tungsten steel tooth preparation and restoration needle according to claim 3, characterized in that: The blade head (13) is conical.

5. A tungsten steel tooth preparation and restoration needle according to claim 4, characterized in that: The number of the cutting grooves (131) is 10-20.

6. A tungsten steel tooth preparation and restoration needle according to claim 5, characterized in that: An annular groove (14) is provided on the outer periphery of the middle portion of the blade head (13), and the number of the annular groove (14) is one.

7. The tungsten steel tooth preparation and restoration needle according to claim 5, characterized in that: Three annular grooves (14) are provided on the outer circumference of the blade head (13).

8. The tungsten steel tooth preparation and restoration needle according to claim 7, characterized in that: The three annular grooves (14) are located on the outer circumference of the cutting edge portion (13) and have the same depth.

9. A tungsten steel tooth preparation and restoration needle according to claim 6 or 8, characterized in that: The depth of the annular groove (14) is 70%-85% of the depth of the cutting groove (131).

Images