Dental drill for implant surgery

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a dental drill for implant surgery, which comprises a drill handle and a drill body arranged at one end of the drill handle, the drill body is provided with a plurality of blades axially and spirally distributed, and the blades converge on the end face far away from the drill handle to form an invasion cutting portion with taper. The cutting edges form a chambering part extending spirally on the cambered surface of the drill body, and end chip grooves with the number smaller than that of the cutting edges are formed in the cutting part. The axial end of the drill body is provided with the cutting blade with taper, the inclined groove for cuttings to invade is formed in the hole opening of the pre-formed small hole, so that the dental drill can smoothly drill into the pre-formed small hole, the blade is prevented from being clamped in the small hole, the cutting part is provided with the end chip grooves with the number unequal to that of the blade, and the blade back with the axial compression area unequal to that of the blade is arranged, so that the tooth drill can smoothly drill into the pre-formed small hole. The blades on the invasion cutting part are subjected to different axial pressures, and single blade concentrated stress is formed by using the pressure difference, so that the invasion efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a dental drill for implant surgery. Background Technology

[0002] With the increasing popularity of dental implant technology, the performance requirements for dental drills in implant surgery are gradually increasing. Traditional dental drills typically employ only a simple cutting edge structure, which easily leads to clogging during drilling, low cutting efficiency, and the generation of localized stress concentrations during drilling, resulting in tooth damage or accelerated cutting edge wear. Existing technologies have attempted to improve chip removal by adding chip flutes, but problems remain, such as insufficient number or unreasonable structure of end chip flutes, and uneven stress distribution, making it difficult to simultaneously meet the requirements of efficient drilling and tooth protection. Therefore, there is an urgent need for a dental drill for implant surgery with a reasonable structure, smooth chip removal, and good resistance to stress concentration.

[0003] A centrally cooled, flat-bottomed coated dental drill disclosed in patent CN210541884U includes a cutting section and a shank for connection with instruments. The cutting section has a spiral structure with a flat tip and three or more evenly distributed spiral grooves. It also has a cutting edge on its side. A cooling hole is axially formed in the cutting section, and a water inlet is radially formed within the spiral grooves, communicating with the cooling hole. The bottom of the cutting section is flat with a sharp cutting edge, allowing for rapid and smooth grinding of the alveolar ridge during cutting, significantly saving surgical time and reducing the surgeon's workload.

[0004] In the above solution, the bottom of the cutting part is flat with a sharp cutting edge, which can quickly grind the alveolar ridge into a flat surface during cutting. The flat surface greatly saves the doctor's operation time and reduces the doctor's labor intensity. However, such drills are mostly used for hole enlargement and trimming, and the flat end cannot make an intrusion notch for small holes, which can easily get stuck in the original hole. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems by providing a dental drill for implant surgery that can solve the technical issues described above.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A dental drill for implant surgery includes a shank and a drill body disposed at one end of the shank. The drill body is provided with a plurality of axially spirally distributed cutting edges. The cutting edges converge at the end face away from the shank to form a tapered cutting section. The cutting edges form a spirally extending enlarging section on the arc surface of the drill body. The cutting section has a number of end chip removal grooves that are less than the number of cutting edges.

[0008] In the dental drill used for implant surgery, a groove for accommodating waste chips is provided at the center of the cutting part, and the end chip removal groove starts from the groove and passes through the side chip removal groove that connects the arc surface of the drill body between two adjacent cutting edges.

[0009] In the dental drill used for implant surgery, the end chip removal groove is provided on the side near the chip cutting edge of the blade, and at least one of the blades does not have a corresponding end chip removal groove.

[0010] In the dental drill used for implant surgery, each of the end chip removal grooves is interconnected through the groove.

[0011] In the dental drill used for implant surgery, at least one of the cutting edges in the cutting section is provided with a stress concentration structure and a corresponding end chip removal groove.

[0012] In the dental drill used for implant surgery, the stress concentration structure includes two inclined surfaces, a first cutting back and a second cutting back, which are connected together. The side of the first cutting back away from the second cutting back is connected to the cutting edge of the blade. The inclination of the second cutting back is greater than that of the first cutting back.

[0013] In the dental drill used for implant surgery, at least a portion of the stress concentration structure is connected to the end chip removal groove.

[0014] In the dental drill used for implant surgery, the cutting portion is provided with a first conical surface whose height gradually decreases circumferentially at the center, and the end chip removal groove expands radially around the first conical surface.

[0015] In the dental drill used for implant surgery, the enlarged portion has a second conical surface inclined toward the axis on the side near the incision portion, and the second conical surface is connected to the first conical surface.

[0016] In the dental drill used for implant surgery, the diameter of the drill body is larger than the diameter of the drill shank and is provided with a diamond-like carbon coating.

[0017] The advantages of this utility model are:

[0018] The axial end of the drill body is equipped with a tapered cutting edge. A slanted groove for chip intrusion is opened at the pre-drilled small hole opening, allowing the drill to smoothly drill into the pre-drilled small hole and preventing the cutting edge from getting stuck in the small hole. In addition, the cutting part has end chip removal grooves with an uneven number of cutting edges and a cutting back with an uneven axial pressure area, so that the cutting edges on the cutting part are subjected to different axial pressures. The pressure difference is used to form a single cutting edge to concentrate the force to improve the intrusion efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the axial structure of the drill body of this utility model.

[0021] Figure 3 This is a schematic diagram of the radial structure of the drill body of this utility model.

[0022] In the diagram, the drill shank is 1, the drill body is 2, the end chip removal groove is 21, the groove is 22, the side chip removal groove is 23, the cutting edge is 3, the first cutting edge back is 31, the second cutting edge back is 32, the cutting part is 4, the reaming part is 5, and the diamond-like carbon coating is 6. Detailed Implementation

[0023] The following are specific embodiments of the utility model, which are described in conjunction with the accompanying drawings. However, the utility model is not limited to these embodiments.

[0024] like Figures 1-3 As shown, the dental drill for implant surgery includes a drill shank 1 and a drill body 2 disposed at one end of the drill shank 1. The drill body 2 is provided with a number of axially spirally distributed cutting edges 3. The cutting edges 3 converge at the end face away from the drill shank 1 to form a tapered cutting section 4. The cutting edges 3 form a spirally extending enlarging section 5 on the arc surface of the drill body 2. The cutting section 4 is provided with a number of end chip removal grooves 21 that are less than the number of cutting edges 3.

[0025] That is, the axial end of the drill body is equipped with a tapered cutting edge, and a slanted groove for chip intrusion is opened at the pre-drilled small hole opening, so that the drill can smoothly drill into the pre-drilled small hole and avoid the cutting edge getting stuck in the small hole. In addition, the cutting part is provided with end chip removal grooves of unequal number to the cutting edge, and the cutting back is provided with unequal axial pressure area, so that the cutting edge on the cutting part is subjected to different axial pressures. The pressure difference is used to form a single cutting edge to concentrate the force to improve the intrusion efficiency.

[0026] In this embodiment, a groove 22 for accommodating waste chips is provided at the center of the cutting part 4, and the end chip removal groove 21 starts from the groove 22 and passes through the side chip removal groove 23 that connects the arc surface of the drill body 2 between two adjacent cutting edges 3.

[0027] The cutting section 4 usually comes into direct contact with the tooth surface, and the chips generated during the process accumulate at the bottom of the slot, thus blocking the contact between the cutting edge and the cutting surface. Therefore, a groove is machined at the center to accommodate the small chips generated during the drilling process. The end chip removal groove starts from the groove and passes through the arc surface of the drill body between two adjacent cutting edges to form a side chip removal groove, thus forming a complete chip removal system, which allows the chips to be quickly discharged during the drilling process and avoids blockage.

[0028] In this embodiment, the end chip removal groove 21 is provided on the side near the chip edge of the blade 3, and at least one blade 3 does not have a corresponding end chip removal groove 21, so as to form a local chip removal difference, which is conducive to the dispersion and discharge of waste chips.

[0029] In this embodiment, each end chip removal groove 21 is interconnected through a groove 22.

[0030] In this embodiment, at least one blade 3 in the cutting section 4 is provided with a stress concentration structure and a corresponding end chip removal groove 21.

[0031] The stress concentration structure includes two inclined surfaces, a first cutting edge 31 and a second cutting edge 32, which are connected together. The side of the first cutting edge 31 away from the second cutting edge 32 is connected to the cutting edge of the cutting edge 3. The inclination of the second cutting edge 32 is greater than that of the first cutting edge 31.

[0032] At least a portion of the stress concentration structure is connected to the end chip removal groove 21.

[0033] This design helps to disperse local stress, and the stress concentration point is set by the local cutting edge to avoid ineffective friction and vibration between the drill body end and the oral cavity tissue. In addition, the stress concentration structure is connected to the corresponding end chip removal groove, which effectively improves the discharge of waste chips.

[0034] Different shapes and angles of cutting edges can be designed according to different tooth hardness to meet the different cutting needs of hard bone and cartilage tissues. For example, only one cutting edge can be set to further increase the cutting stress of the cutting edge.

[0035] In this embodiment, the cutting section 4 is provided with a first conical surface that gradually decreases in height and circumference at the center, and the end chip discharge groove 21 expands radially with respect to the first conical surface.

[0036] The enlarged hole 5 has a second conical surface that is inclined toward the axis on the side near the cutting part 4, and the second conical surface is connected to the first conical surface.

[0037] A first conical surface is provided on the cutting section, which gradually decreases in height from the center of the drill body in the circumferential direction. The end chip removal groove expands radially based on the first conical surface. On the side of the reaming section near the cutting section, a second conical surface is provided that is inclined towards the axis. The second conical surface is connected to the first conical surface, so that the hole wall forms a smooth transition during the drilling process, thereby ensuring the hole diameter accuracy and drilling effect.

[0038] In this embodiment, the diameter of the drill body 2 is larger than that of the drill shank 1 and is provided with a diamond-like carbon coating to ensure that sufficient cutting force is transmitted during drilling, while improving the corrosion resistance and durability of the drill bit. At the same time, the waste chips coming out of the side chip removal groove 23 also have a path to be discharged.

[0039] Both the drill shank and drill body are made of high-strength stainless steel, a material with good biocompatibility, corrosion resistance, and mechanical strength. The drill bit surface is strengthened using a precision heat treatment process to ensure its sharpness, hardness, and wear resistance. The drill bit's structural design can reduce the heat generated during drilling to a certain extent, minimizing thermal damage to the alveolar ridges. The chip removal grooves and recesses require high machining precision and are processed using high-precision CNC machine tools to ensure unobstructed chip removal channels and a stable structure.

[0040] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A dental drill for implant surgery, comprising a drill shank (1) and a drill body (2) disposed at one end of the drill shank (1), characterized in that, The drill body (2) is provided with a number of axially spirally distributed cutting edges (3). The cutting edges (3) converge at the end face away from the drill shank (1) to form a tapered cutting section (4). The cutting edges (3) form a spirally extending enlarged hole section (5) on the arc surface of the drill body (2). The cutting section (4) is provided with a number of end chip removal grooves (21) smaller than the number of cutting edges (3).

2. The dental drill for implant surgery according to claim 1, characterized in that, The cutting section (4) has a groove (22) at its center for accommodating waste chips. The end chip removal groove (21) starts from the groove (22) and passes through the side chip removal groove (23) between the two adjacent cutting edges (3) that connects the arc surface of the drill body (2).

3. The dental drill for implant surgery according to claim 2, characterized in that, The end chip removal groove (21) is provided on the side near the chip edge of the blade (3), and at least one of the blades (3) does not have a corresponding end chip removal groove (21).

4. The dental drill for implant surgery according to claim 2, characterized in that, Each of the end chip removal grooves (21) is interconnected through the groove (22).

5. The dental drill for implant surgery according to claim 1, characterized in that, At least one of the cutting edges (3) in the cutting section (4) is provided with a stress concentration structure and a corresponding end chip removal groove (21).

6. The dental drill for implant surgery according to claim 5, characterized in that, The stress concentration structure includes two inclined surfaces, a first cutting edge (31) and a second cutting edge (32), which are connected together. The side of the first cutting edge (31) away from the second cutting edge (32) is connected to the cutting edge of the blade (3). The inclination of the second cutting edge (32) is greater than that of the first cutting edge (31).

7. The dental drill for implant surgery according to claim 5, characterized in that, At least a portion of the stress concentration structure is connected to the end chip removal groove (21).

8. The dental drill for implant surgery according to claim 1, characterized in that, The cutting section (4) is provided with a first conical surface that gradually decreases in height and circumference at the center, and the end chip discharge groove (21) expands radially with respect to the first conical surface.

9. The dental drill for implant surgery according to claim 8, characterized in that, The enlarged hole (5) has a second conical surface that is inclined toward the axis on the side near the cutting part (4), and the second conical surface is connected to the first conical surface.

10. The dental drill for implant surgery according to claim 1, characterized in that, The drill body (2) has a larger diameter than the drill shank (1) and is coated with a diamond-like carbon coating.

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