Dental bur and dental handpiece

Abstract

The utility model relates to a dental bur and a dental handpiece. The dental bur comprises a bur handle, the conical needle head is connected to one end of the needle handle, the diameter of the conical needle head is gradually increased in the direction close to the needle handle, a plurality of cutting edges are arranged on the periphery of the conical needle head, and a cutting groove is formed between any two adjacent cutting edges at intervals; wherein the relief angle of the circumferential edge of each cutting edge is 0 degree. According to the dental bur and the dental handpiece, the relief angle of the circumferential edge of each cutting edge is 0 degree, so that the sharpness of the conical needle head can be reasonably reduced, the material of a tooth body is not damaged while an adhesive is removed, and the cutting grooves are formed between every two adjacent cutting edges at intervals so as to provide enough chip removal space for the adhesive. Besides, the structure with multiple cutting edges can remove the adhesive and slightly polish the surface of the tooth body, so that the surface of the tooth body is more flat and smooth.

Description

Technical Field

[0001] The present application relates to the technical field of medical instruments, and in particular to dental burs and dental handpieces. Background Art

[0002] Dental burs are medical devices that are intended for clinical use in drilling, milling, grinding, and polishing teeth. They are usually mounted on dental mobile phones. Currently, the demand for orthodontics is growing. The most mature and effective form of orthodontics is to use metal brackets bonded to teeth, so that the teeth can be moved and aligned to achieve the ideal position and effect with a slight force. After orthodontics is completed, dental burs are needed to remove the remaining adhesive from the brackets.

[0003] In the related art, tungsten steel needles and diamond grinding needles are often used to remove adhesives. However, tungsten steel needles are very sharp and will damage the tooth enamel itself while removing adhesives, affecting the appearance of teeth. If diamond grinding needles are used to remove adhesives, since the space between diamond grinding particles is very small, it is easy for the adhesive to block the chip removal space, and the ideal effect cannot be achieved. Utility Model Content

[0004] Based on this, it is necessary to provide a dental needle and dental handpiece that can reduce the sharpness without damaging the tooth body and provide sufficient chip removal space to solve the problem that the tungsten steel needle and diamond needle in the related art are very sharp and will damage the tooth body and block the chip removal space when removing the adhesive on the tooth.

[0005] In one aspect of the present application, a dental needle is provided, comprising:

[0006] The needle handle; and

[0007] A conical needle head connected to one end of the needle handle, wherein the diameter of the conical needle head gradually increases toward the needle handle, and the outer periphery of the conical needle head has a plurality of cutting edges, and a cutting groove is formed between any two adjacent cutting edges;

[0008] Wherein, the back angle of the peripheral edge of each cutting edge is 0 degree.

[0009] The dental bur can reasonably reduce the sharpness of the conical needle by setting the back angle of each cutting edge to 0 degrees, so as not to damage the material of the tooth itself while removing the adhesive, and a cutting groove is formed between two adjacent cutting edges to provide sufficient chip removal space for the adhesive. In addition, the structure of multiple cutting edges can also slightly polish the tooth surface while removing the adhesive, making the tooth surface flatter and smoother.

[0010] In one embodiment, the width of the peripheral edge is 0.05 mm to 0.15 mm.

[0011] By setting the width of the peripheral edge of the cutting edge to 0.05 mm to 0.15 mm, it is possible to avoid the peripheral edge being too small and too sharp, or being too large and occupying the space of the cutting groove. In this way, the sharpness of the cutting edge can be reliably controlled.

[0012] In one embodiment, the number of the cutting edges is 10 to 30.

[0013] By setting the number of cutting edges to 10 to 30, a better polishing effect on the tooth surface can be achieved when the number of cutting edges is large, and when the number of cutting edges is small, the number of corresponding cutting grooves can be smaller, the space can be larger, the adhesive discharge speed can be faster, and it is more conducive to the efficient removal of the adhesive.

[0014] In one embodiment, the end surface of the tapered needle at the end away from the needle handle is a flat surface without an edge.

[0015] Since the end of the tapered needle away from the needle handle is the first part to contact the teeth, the end face of this end is set as a bladeless plane, which can protect the gums and other soft tissues in the oral cavity and reduce the risk of accidental injury.

[0016] In one embodiment, the tapered needle head is provided with a chamfer at an end away from the needle handle for transitioning from the edgeless plane to the cutting edge.

[0017] The chamfered setting can make the end of the tapered needle smoother, further protecting the gums and other soft tissues in the oral cavity and reducing the risk of accidental injury.

[0018] In one embodiment, the chamfer angle ranges from 40 degrees to 160 degrees.

[0019] In one embodiment, the length of each cutting edge is 3 mm to 10 mm.

[0020] Due to the different positions and sizes of the teeth to be treated, when using the conical needle of the dental bur for treatment, the corresponding operation can be performed by using a conical needle with different cutting edge lengths. Specifically, when treating the front teeth, a conical needle with a cutting edge length of 8 mm to 10 mm can be used, and when treating the back teeth or children's teeth, a conical needle with a cutting edge length of 3 mm to 7 mm can be used. In this way, by setting the cutting edge length of the conical needle to 3 mm to 10 mm, it can adapt to a variety of application scenarios.

[0021] In one embodiment, the taper of the tapered needle ranges from 4 degrees to 8 degrees.

[0022] By setting the taper range of the conical needle to 4 to 8 degrees, the conical needle will not be too straight, and the adhesive can be effectively removed. In addition, it will not be too sharp to damage the material of the tooth itself. In addition, a reasonable taper range can also make it easier for medical staff to operate.

[0023] In one embodiment, the conical needle is a tungsten steel conical needle.

[0024] The tungsten steel conical needle is very sharp. Therefore, by setting the conical needle in the embodiment of the present application to a tungsten steel conical needle, the sharpness of the conical needle can be more effectively reduced, and it is more conducive to removing the adhesive without damaging the material of the tooth itself.

[0025] In another aspect of the present application, a dental handpiece is provided, comprising the dental bur in any of the above embodiments.

[0026] The dental handpiece can reasonably reduce the sharpness of the conical needle by setting the back angle of each cutting edge of the dental needle to 0 degrees, so as not to damage the material of the tooth itself while removing the adhesive, and also form a cutting groove between two adjacent cutting edges to provide sufficient chip removal space for the adhesive. In addition, the multi-cutting edge structure can also slightly polish the tooth surface while removing the adhesive, making the tooth surface flatter and smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a front view of a dental bur in one or more embodiments of the present application.

[0028] Figure 2 It is a side view of a tapered needle in a dental bur in one or more embodiments of the present application.

[0029] Description of reference numerals:

[0030] The dental bur 100 , the needle handle 10 , the tapered needle head 20 , the cutting edge 21 , the peripheral edge 211 , the cutting groove 22 , the end face 23 , the chamfer 24 , the needle neck 30 , the cylindrical section 31 , and the tapered section 32 . DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0033] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0037] Figure 1 It is a front view of a dental bur in one or more embodiments of the present application. Figure 2 A side view of a tapered needle in a dental bur in one or more embodiments of the present application. Figure 1 and Figure 2 A dental bur 100 provided in one embodiment of the present application includes a needle handle 10 and a tapered needle head 20 .

[0038] The dental bur 100 of the embodiment of the present application can be used to remove adhesives on teeth, and can also be used to remove impurities on teeth. In addition, the dental bur 100 of the embodiment of the present application can be applied to a dental mobile phone, or can be applied to other medical devices suitable for the dental bur 100, without specific limitation.

[0039] The conical needle head 20 is connected to one end of the needle handle 1, and the diameter of the conical needle head 20 gradually increases toward the needle handle 10. The outer periphery of the conical needle head 20 has a plurality of cutting edges 21, and a cutting groove 22 is formed between any two adjacent cutting edges 21. The back angle α of the peripheral edge 211 of each cutting edge 21 is 0 degrees.

[0040] It can be understood that when the back angle α of the peripheral edge 211 of each cutting edge 21 is 0 degrees, the peripheral edge 211 is a cylindrical edge, that is, the blade surface of the peripheral edge 211 is an arc surface of a cylinder whose center coincides with the axis of the conical needle.

[0041] By setting the back angle α of the peripheral edge 211 of each cutting edge 21 to 0 degrees, the sharpness of the conical needle 20 can be reasonably reduced, so that the material of the tooth itself is not damaged while removing the adhesive, and a cutting groove 22 is formed between two adjacent cutting edges 21 to provide sufficient chip removal space for the adhesive. In addition, the structure of multiple cutting edges 21 also slightly polishes the tooth surface while removing the adhesive, making the tooth surface flatter and smoother.

[0042] Specifically in the embodiment of the present application, the needle handle 10 is cylindrical, and its length may be greater than the length of the tapered needle head 20, so as to facilitate the medical staff to hold and operate it or match it to a corresponding medical device.

[0043] In addition, one end of the needle handle 10 away from the tapered needle head 20 may be provided with a chamfer to reduce wear.

[0044] In some embodiments, the dental bur 100 further includes a needle neck 30 , which is connected between the needle handle 10 and the tapered needle head 20 .

[0045] Optionally, the diameter of the needle neck 30 is smaller than the diameter of the needle handle 10, and also smaller than the maximum diameter of the tapered needle 20. This is to facilitate the operation of the tapered needle 20, so that the portion of the tapered needle 20 close to the needle handle 10 is not affected by the needle neck 30, so that the tapered needle 20 can be used more flexibly, and the needle handle 10 can also maintain a larger diameter, so that it has a stronger structural strength.

[0046] Specifically, the needle neck 30 includes a cylindrical section 31 and a conical section 32, one end of the cylindrical section 31 is connected to the conical needle head 20, the other end of the cylindrical section 31 is connected to one end of the conical section 32, and the other end of the conical section 32 is connected to the needle handle 10, wherein the diameter of the conical section 32 gradually increases from the conical needle head 20 toward the needle handle 10.

[0047] In some embodiments, the needle handle 10, the tapered needle head 20 and the needle neck 30 may be integrally formed. In other embodiments, the needle handle 10 and the needle neck 30 may be integrally formed, and the tapered needle head 20 and the needle neck 30 may be detachably connected, so as to facilitate the adaptation of various types of tapered needle heads 20, such as tapered needle heads 20 with different numbers of cutting edges 21, or tapered needle heads 20 with cutting edges 21 of different lengths, etc.

[0048] In some embodiments, the tapered needle 20 has a taper ranging from 4 degrees to 8 degrees.

[0049] By setting the taper range of the conical needle 20 to 4 to 8 degrees, the conical needle 20 will not be too straight, and the adhesive can be effectively removed, and it will not be too sharp to damage the material of the tooth itself. In addition, a reasonable taper range can also make it easier for medical staff to operate.

[0050] Optionally, the tapered needle 20 has a taper of 4 degrees, 5 degrees, 6 degrees, 7 degrees or 8 degrees.

[0051] In some embodiments, the number of cutting edges 21 of the tapered needle 20 is 10 to 30.

[0052] By setting the number of cutting edges 21 to 10 to 30, a better polishing effect on the tooth surface can be achieved when the number of cutting edges 21 is large, and when the number of cutting edges 21 is small, the number of corresponding cutting grooves 22 can be smaller, the space can be larger, the discharge speed of the adhesive can be faster, and it is more conducive to the efficient removal of the adhesive.

[0053] Optionally, the number of the cutting edges 21 is 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, or 30.

[0054] In the embodiment of the present application, all the cutting edges 21 are evenly arranged along the circumference of the tapered needle 20 .

[0055] In some embodiments, the cutting edge 21 of the tapered needle 20 may be linear or spiral, which is not limited herein.

[0056] In some embodiments, the cutting edge 21 of the tapered needle 20 has a length L of 3 mm to 10 mm.

[0057] Due to the different positions and sizes of the teeth to be treated, when using the conical needle 20 of the dental bur 100 for treatment, the corresponding operation can be performed by using a conical needle 20 with different blade lengths L of the cutting edge 21. Specifically, when treating the front teeth, a conical needle 20 with a blade length L of 8 mm to 10 mm of the cutting edge 21 can be used, and when treating the back teeth or children's teeth, a conical needle 20 with a blade length L of 3 mm to 7 mm of the cutting edge 21 can be used. In this way, in the embodiment of the present application, by setting the blade length L of the cutting edge 21 of the conical needle 20 to 3 mm to 10 mm, it can adapt to a variety of application scenarios.

[0058] In some embodiments, the width b of the peripheral edge 211 of the cutting edge 21 is 0.05 mm to 0.15 mm.

[0059] By setting the width b of the peripheral edge 211 of the cutting edge 21 to 0.05 mm to 0.15 mm, it can be avoided that the width b of the peripheral edge 211 is too small and too sharp, and the width b of the peripheral edge 211 is too large and occupies the space of the cutting groove 22. In this way, the sharpness of the cutting edge 21 can be reliably controlled.

[0060] Optionally, the width b of the peripheral edge 211 of the cutting edge 21 is 0.05 mm, 0.1 mm or 0.15 mm.

[0061] In some embodiments, the end surface 23 of the tapered needle 20 at the end away from the needle handle 10 is a flat surface without an edge.

[0062] Since the end of the tapered needle 20 away from the needle handle 10 is the first part to contact the teeth, the end face 23 of this end is set as a non-edge plane, which can protect the gums and other soft tissues in the oral cavity and reduce the risk of accidental injury.

[0063] Furthermore, the conical needle head 20 is provided with a chamfer 24 at one end away from the needle handle 10 , which transitions from the edgeless plane to the cutting edge 21 .

[0064] The chamfer 24 can make the end of the conical needle 20 smoother, further protecting the gums and other soft tissues in the oral cavity and reducing the risk of accidental injury.

[0065] Specifically, the conical needle head 20 is provided with a truncated cone structure at one end away from the needle handle 10 , and the diameter of the truncated cone structure gradually increases toward the cutting edge 21 .

[0066] In some embodiments, the angle of the chamfer 24 ranges from 40° to 160°.

[0067] Optionally, the angle of the chamfer 24 is 40 degrees, 60 degrees, 80 degrees, 90 degrees, 120 degrees, 140 degrees or 160 degrees.

[0068] In some embodiments, the tapered needle 20 is a tungsten steel tapered needle.

[0069] Tungsten steel conical needles are very sharp. Therefore, by setting the conical needle 20 in the embodiment of the present application to a tungsten steel conical needle, the sharpness of the conical needle 20 can be more effectively reduced, and it is more conducive to removing the adhesive without damaging the material of the tooth itself.

[0070] In addition, the present application also verifies the effect of the dental bur 100 in the above embodiment by simulating clinical use scenarios, as follows:

[0071] The dental bur 100 of the embodiment of the present application and the conventional tungsten steel bur were used to conduct cutting tests on ex vivo teeth and resin teeth (simulating orthodontic adhesives). The experiment showed that the dental bur 100 of the embodiment of the present application did not significantly remove the surface of the ex vivo tooth, but only slightly scratched it, and failed to change the appearance and shape of the tooth itself; while the conventional tungsten steel bur was very efficient and stable in removing tooth material and trimming the tooth shape. In addition, when the dental bur 100 of the embodiment of the present application cuts the resin material, it can be removed step by step and layer by layer in a stable manner; while when the conventional tungsten steel bur cuts the resin material, it can cut through the entire resin tooth within 2 seconds.

[0072] Therefore, the dental needle 100 of the embodiment of the present application can not only remove the adhesive smoothly but also protect the tooth material itself, thus making up for the problems existing in the conventional tungsten steel needle.

[0073] Based on the same inventive concept, an embodiment of the present application further provides a dental mobile phone, including the dental bur 100 in any of the above embodiments.

[0074] The dental handpiece, by setting the back angle α of the peripheral edge 211 of each cutting edge 21 in the dental needle 100 to 0 degrees, can reasonably reduce the sharpness of the tapered needle 20, so as not to damage the material of the tooth itself while removing the adhesive, and also form a cutting groove 22 between two adjacent cutting edges 21 to provide sufficient chip removal space for the adhesive. In addition, the structure of multiple cutting edges 21 also slightly polishes the tooth surface while removing the adhesive, making the tooth surface flatter and smoother.

[0075] Specifically, the dental handpiece includes a dental handpiece body, and the dental bur 100 is detachably arranged on the handpiece body.

[0076] In this way, the dental needle 100 can be easily replaced to increase the overall service life of the dental handpiece body.

[0077] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A dental needle, characterized in that: include: Needle handle (10); as well as A conical needle head (20) is connected to one end of the needle handle (10), the diameter of the conical needle head (20) gradually increases in a direction close to the needle handle (10), the outer periphery of the conical needle head (20) has a plurality of cutting edges (21), and a cutting groove (22) is formed between any two adjacent cutting edges (21); Wherein, the back angle (α) of the peripheral edge (211) of each cutting edge (21) is 0 degrees.

2. The dental bur according to claim 1, characterized in that: The width (b) of the peripheral edge (211) is 0.05 mm to 0.15 mm.

3. The dental bur according to claim 1, characterized in that: The number of the cutting edges (21) is 10 to 30.

4. The dental bur according to claim 1, characterized in that: The end surface (23) of the conical needle head (20) at the end away from the needle handle (10) is a flat surface without an edge.

5. The dental bur according to claim 4, characterized in that: The conical needle head (20) is provided with a chamfer (24) at an end away from the needle handle (10) for transitioning from the edgeless plane to the cutting edge (21).

6. The dental bur according to claim 5, characterized in that: The angle range of the chamfer (24) is 40 degrees to 160 degrees.

7. The dental bur according to claim 1, characterized in that: The blade length (L) of each cutting edge (21) is 3 mm to 10 mm.

8. The dental bur according to claim 1, characterized in that: The taper of the conical needle (20) ranges from 4 to 8 degrees.

9. The dental bur according to claim 1, characterized in that: The conical needle (20) is a tungsten steel conical needle (20).

10. A dental handpiece, characterized in that: It comprises the dental bur (100) as claimed in any one of claims 1 to 9.

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