Dental drill with good centering and high sharpness

Abstract

The utility model provides a high-sharpness dental drill with good centering, which comprises a cutter handle and a cutting edge which are connected into a whole. A connector part is arranged at the end, away from the cutting edge, of the cutter handle, the cutting edge comprises spiral cutting edges and end edges, the spiral cutting edges spirally extend along the axis of the cutting edge, and a chip groove is formed between every two adjacent spiral cutting edges. The end edge is arranged at one end of the blade. The end edges comprise centering end edges and cutting end edges, the centering end edges and the cutting end edges are integrally and sequentially arranged outwards along the center of the edge, and the included angle between every two centering end edges is smaller than the included angle between every two cutting end edges. During use, the centering end edge firstly makes contact with the jaw bone, then the cutting end edge conducts drilling, and chippings generated in the drilling process are discharged from the chip discharging groove along with the spiral cutting edge. The centering end edge with the small included angle mainly plays a role in extruding and shearing, cutting resistance is reduced, the cutting force of the inner edge and the cutting force of the outer edge are balanced, the dental drill is prevented from deviating to one side, and drilling precision and stability are improved.

Description

Technical Field

[0001] The utility model relates to a dental drill, in particular to a dental drill with good centering and high sharpness. Background Art

[0002] Dental drills play a vital role in oral diagnosis and treatment. Dentists use dental drills to remove corroded tooth tissue on the surface and inside of teeth. Dental drills are also used to open the pulp cavity and clean infected pulp tissue and inflammatory substances in the root canal. In recent years, more and more people have chosen dental implant surgery. Dentists need to use dental drills to accurately drill one or more holes in the jawbone to ensure that the implant can be firmly implanted and tightly integrated with the surrounding bone tissue. Existing dental drills require the use of a series of specially designed guide drill bits to gradually increase the aperture to ensure the correct direction and angle of implant implantation. The entire operation process is cumbersome, the operation time is long, and it is easy to cause thermal damage to bone tissue, affecting postoperative healing and increasing the patient's pain. It also leads to an increase in surgical and equipment costs.

[0003] Therefore, the above problems need to be solved urgently. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, the utility model provides a dental drill with good centering and high sharpness.

[0005] Technical solution: In order to achieve the above-mentioned purpose, the utility model provides a centering high-sharpness dental drill, including a handle and a blade, and the handle and the blade are connected as one body. An interface portion is provided at the end of the handle away from the blade, and the blade includes a spiral cutting edge and an end edge, and the spiral cutting edge extends spirally along the axis of the blade, and a chip groove is provided between every two adjacent spiral cutting edges. An end edge is provided at the end of the blade away from the handle. The end edge includes a centering end edge and a cutting end edge, and the centering end edge and the cutting end edge are integrally arranged in sequence outward from the center of the blade, and the axial cross-section angle of every two centering end edges is smaller than the axial cross-section angle of every two cutting end edges. When in use, the interface portion is connected to a dental handpiece, and the dental handpiece drives the dental drill to rotate, and the centering end edge first contacts the tooth or the jawbone, and then the cutting end edge performs drilling, and the debris generated during the drilling process is discharged from the chip groove along with the spiral cutting edge. The centering end blade has a smaller angle and a larger negative rake angle when cutting, so that the centering end blade mainly plays the role of extrusion and shearing, reducing cutting resistance, which is beneficial to balancing the cutting force of the inner and outer blades, preventing the dental drill from deviating to one side, and improving the accuracy and stability of drilling.

[0006] Furthermore, in the above-mentioned centering high-sharpness dental drill, the angle between the axial sections of each two centering end blades is 100 degrees, and the angle between the axial sections of each two cutting end blades is 120 degrees. A smaller centering end blade angle can reduce the cutting thickness, enhance the extrusion force of the centering end blade, enhance the axial stability of the dental drill, reduce the risk of the dental drill deviating from the center, and ensure the accuracy of the hole. A larger cutting end blade angle is conducive to reducing the cutting force, reducing the cutting temperature, avoiding thermal damage to bone tissue, facilitating the smooth discharge of chips, reducing tool wear, and increasing tool life.

[0007] Furthermore, in the above-mentioned centering high-sharpness dental drill, the spiral cutting edge includes a peripheral blade and a blade band, and the peripheral blade and the blade band are arranged in sequence in an integrated manner along the end blade toward the handle. The peripheral blade axis section and the blade centerline form an angle, and the extension line of the peripheral blade axis section intersects with the blade centerline on one side of the end blade. The section connecting the spiral cutting edge and the cutting end blade is set as the peripheral blade. The peripheral blade is sharper and participates in cutting. The hole formed by the cutting of the cutting end blade is further enlarged. In this process, the cutting amount of the peripheral blade is very small, and the cutting resistance of the peripheral blade is very small, which is conducive to controlling the cutting temperature and can effectively avoid thermal damage to the surrounding tissue. Setting the spiral cutting edge away from the cutting end blade as the blade band helps to maintain the correct positioning of the dental drill.

[0008] Furthermore, in the above-mentioned centering high-sharpness dental drill, the blade axis section is inverted cone shape, and the extension line of the blade axis section intersects with the blade center line on the handle side. The inverted cone shape of the blade avoids the surrounding tissue, reduces the friction and heat accumulation during the drilling process, helps to improve the dimensional accuracy of the hole, and reduces the damage to the surrounding tissue.

[0009] Furthermore, in the above-mentioned centering high-sharpness dental drill, the end edge is provided with a chip breaker groove, which extends from the centering end edge to the chip discharge groove. The chip breaker groove can break up large debris into smaller media, avoid clogging, and make it easier for the media to be discharged from the hole, avoiding heat accumulation.

[0010] Furthermore, in the above-mentioned centering high-sharpness dental drill, a ring mark is provided at one end where the blade and the handle are connected. The ring mark can be set to multiple, and the dentist can calculate the drilling depth by observing the ring mark.

[0011] Furthermore, in the above-mentioned centering high-sharpness dental drill, a stop ring is provided at one end of the handle close to the blade, and the diameter of the stop ring is larger than the diameter of the handle. The stop ring limits the maximum drilling depth of the dental drill and reduces the risk of surgery.

[0012] Furthermore, in the above-mentioned centering high-sharpness dental drill, the peripheral blade is provided with a peripheral blade clearance angle, and the cross section of the peripheral blade clearance angle and the tangent line of the blade cross section are at an angle of 15-20 degrees. The peripheral blade is provided with a peripheral blade clearance angle, which reduces the direct contact area between the dental drill and the tissue, reduces the friction between the dental drill and the tissue, reduces the cutting force, reduces the heat generation, and allows more cooling water to enter, take away the cutting heat, and further reduce the possibility of thermal damage.

[0013] Furthermore, in the above-mentioned centering and high-sharpness dental drill, the number of spiral cutting edges is set to 2 or more.

[0014] Furthermore, in the above-mentioned centering high-sharpness dental drill, the blade is provided with a back angle, which improves the sharpness of the blade, reduces the direct contact area between the dental drill and the tissue, reduces the friction between the dental drill and the tissue, reduces the cutting force, and reduces heat generation. The back angle can allow more cooling water to enter, take away the cutting heat, and further reduce the possibility of thermal damage.

[0015] It can be seen from the above technical scheme that the utility model has the following beneficial effects: in the centering high-sharpness dental drill of the utility model, the centering end blade first contacts the tooth or jawbone, and then the cutting end blade is used for drilling, and the debris generated during the drilling process is discharged from the chip groove along with the spiral cutting edge. The centering end blade has a smaller angle, and the centering end blade has a larger negative rake angle when cutting. The centering end blade mainly plays the role of extrusion and shearing, reducing the cutting resistance, which is conducive to balancing the cutting force of the inner and outer blades, preventing the dental drill from deviating to one side, and improving the accuracy and stability of drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a dental drill with good centering and high sharpness.

[0017] Figure 2 The utility model is a schematic diagram of the outline of a dental drill with good centering and high sharpness.

[0018] Figure 3 It is the cross-sectional view of the peripheral blade.

[0019] In the figure: 1, tool handle, 11, interface part, 12, stop ring, 2, blade, 21, spiral cutting edge, 211, peripheral blade, 212, blade band, 213, peripheral blade back angle, 22, end blade, 221, centering end blade, 222, cutting end blade, 223, chip breaker, 224, ring mark, 23, chip removal groove. DETAILED DESCRIPTION

[0020] Example 1

[0021] like Figure 1-2A centering high-sharpness dental drill shown in the figure comprises a handle 1 and a blade 2, which are connected as one body. An interface portion 11 is provided at one end of the handle 1 away from the blade 2, and the blade 2 comprises a spiral cutting edge 21 and an end edge 22, the spiral cutting edge 21 extends spirally along the axis of the blade 2, and a chip groove 23 is provided between every two adjacent spiral cutting edges 21. An end edge 22 is provided at one end of the blade 2 away from the handle 1. The end edge 22 comprises a centering end edge 221 and a cutting end edge 222, and the centering end edge 221 and the cutting end edge 222 are arranged in sequence from the center of the blade 2 outward, and the axial section angle of every two centering end edges 221 is less than the axial section angle of every two cutting end edges 222, and the axial section angle of every two centering end edges 221 is 100 degrees, and the axial section angle of every two cutting end edges 222 is 120 degrees. There are two or more spiral cutting edges 21. The blade 2 is provided with a back angle to improve the sharpness of the blade 2. The spiral cutting edge 21 includes a peripheral blade 211 and a margin 212, which are integrally arranged in sequence along the end blade 22 toward the shank 1. The axial section of the peripheral blade 211 and the center line of the blade 2 form an angle, and the extension line of the axial section of the peripheral blade 211 intersects with the center line of the blade 2 on the side of the end blade 22. The angle of the extension line of the axial section of the peripheral blade 211 is 8 degrees. The axial section of the margin 212 is inverted cone-shaped, and the extension line of the axial section of the margin 212 intersects with the center line of the blade 2 on the side of the shank 1. The margin 212 reduces 0.1-0.15 unit diameter for every 100 unit length from the end blade 22 to the shank 1. The margin 212 is inverted cone-shaped to avoid the surrounding tissue. The end blade 22 is provided with a chip breaker groove 223, and the chip breaker groove 223 extends from the centering end blade 221 to the chip removal groove 23. The chip breaker groove 223 is 0.7 mm wide. A ring mark 224 is provided at one end where the blade 2 and the handle 1 are connected. Multiple ring marks 224 can be set by laser marking. A stop ring 12 is provided at one end of the handle 1 close to the blade 2, and the diameter of the stop ring 12 is greater than the diameter of the handle 1. When in use, the interface 11 is connected to the dental handpiece, and the dental handpiece drives the dental drill to rotate. The centering end blade 221 first contacts the teeth or the jawbone, and then the cutting end blade 222 performs drilling. The debris generated during the drilling process is discharged from the chip groove 23 along with the spiral cutting edge 21.

[0022] like Figure 3 In the centering high-sharpness dental drill shown in the figure, the peripheral blade 211 is provided with a peripheral blade clearance angle 213, and the cross section of the peripheral blade clearance angle 213 and the tangent line of the cross section of the blade 2 form an angle of 15-20 degrees.

[0023] The above embodiments are exemplary, and their purpose is to illustrate the technical concept and features of the utility model so that people familiar with this field can understand the content of the utility model and implement it accordingly, and they cannot limit the protection scope of the utility model in turn. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A dental drill with good centering and high sharpness, characterized by: The invention comprises a shank (1) and a blade (2), wherein the shank (1) and the blade (2) are connected as a whole; an interface portion (11) is provided at one end of the shank (1) away from the blade (2); the blade (2) comprises a spiral cutting blade (21) and an end blade (22); the spiral cutting blade (21) extends spirally along the axis of the blade (2); a chip removal groove (23) is provided between every two adjacent spiral cutting blades (21); an end blade (22) is provided at one end of the blade (2) away from the shank (1); the end blade (22) comprises a centering end blade (221) and a cutting end blade (222); the centering end blade (221) and the cutting end blade (222) are integrally arranged in sequence outwardly from the center of the blade (2); and the axial section angle between every two centering end blades (221) is smaller than the axial section angle between every two cutting end blades (222).

2. The centering high sharpness dental drill according to claim 1, characterized in that: The axial cross-section angle between each two centering end blades (221) is 100 degrees, and the axial cross-section angle between each two cutting end blades (222) is 120 degrees.

3. The centering high sharpness dental drill according to claim 1, characterized in that: The spiral cutting edge (21) comprises a peripheral edge (211) and a margin (212), wherein the peripheral edge (211) and the margin (212) are integrally arranged in sequence along the end edge (22) in the direction of the shank (1); an axial section of the peripheral edge (211) and a center line of the blade (2) form an angle, and an extension line of the axial section of the peripheral edge (211) intersects with the center line of the blade (2) on one side of the end edge (22).

4. The centering high sharpness dental drill according to claim 3, characterized in that: The axial cross section of the cutting edge (212) is in the shape of an inverted cone, and an extension line of the axial cross section of the cutting edge (2) intersects with a center line of the cutting edge (2) on the shank (1) side.

5. The centering high sharpness dental drill according to claim 1, characterized in that: The end edge (22) is provided with a chip breaker groove (223), and the chip breaker groove (223) extends from the centering end edge (221) to the chip removal groove (23).

6. The centering high sharpness dental drill according to claim 1, characterized in that: A ring mark (224) is provided at one end where the blade (2) and the handle (1) are connected.

7. The centering high sharpness dental drill according to claim 1, characterized in that: A stop ring (12) is provided at one end of the knife handle (1) close to the blade (2); the diameter of the stop ring (12) is greater than the diameter of the knife handle (1).

8. The centering high sharpness dental drill according to claim 3, characterized in that: The peripheral blade (211) is provided with a peripheral blade back angle (213), and a cross section of the peripheral blade back angle (213) and a tangent line of a cross section of the blade (2) form an angle of 15-20 degrees.

9. The centering high sharpness dental drill according to claim 1, characterized in that: The number of the spiral cutting edges (21) is 2 or more.

10. The centering high sharpness dental drill according to claim 1, characterized in that: The blade (2) is provided with a back angle.

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