A drill bit for drilling a tooth root bone

Abstract

A drill bit for drilling holes in tooth roots belongs to the field of biomedical instruments. It includes a rotary cutting drill, which includes a root apex, a body, a neck and a head. The root apex is provided with a double-arc cutting edge, which is connected to the body to form an overflow groove. The neck is cylindrical, and the neck and the body extend continuously to the head. The head is hexagonal, and the head and the neck are fixedly connected. The root apex, the body, the neck and the center of the head are all provided with connected fluid inlets; the specially designed double-arc cutting edge solves the problem of drill bit feed amount, and in combination with the fluid inlet arranged at the rear side of the double-arc cutting edge, the coolant enters the drilling part from the fluid inlet for cooling. Due to the presence of the double-arc cutting edge at the front side, there will be no debris blocking the fluid inlet, so that a better cooling effect can be exerted, which greatly improves the treatment efficiency and effect of dentists.

Description

Technical Field

[0001] The invention relates to the technical field of biomedical instruments, in particular to a drill bit for drilling holes in tooth roots and bones. Background Art

[0002] Artificial dental implant technology has been widely used in oral treatment. Drills are usually used in artificial dental implant technology, and the drills need to rotate at high speed. In the process of dental implant, the temperature of the alveolar bone cannot exceed 42 degrees, otherwise the bone tissue will die and the implant cannot grow into one with the surrounding bone tissue. The internal cooling holes of the existing internal cooling drills are all penetrated at the top of the drill. When used, the internal cooling holes are exposed to the axial pressure against the drilled bone, which can easily cause the cooling holes to be blocked, affecting the normal discharge of the coolant and reducing the cooling effect. In addition, because the cooling hole opening is opened at the top of the drill, the cutting edge of the drill is damaged, which reduces the cutting effect of the drill and increases the cutting force, thereby increasing the cutting heat of the drill bit drilling the bone, and then the dentist cannot control the feed force well, resulting in slow drilling and even the death of the surrounding bone tissue, affecting the effect of dental implant. Summary of the invention

[0003] The purpose of the present invention is to provide a drill bit for root bone drilling, which can greatly improve the cooling efficiency of dental drilling, prevent the blockage of cooling holes, accurately drill the feed progress, and greatly improve the treatment efficiency and effect of dentists.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a drill bit for drilling roots of teeth, including a rotary cutting drill, the rotary cutting drill including a root apex, a body, a neck and a head, the root apex is provided with a double-arc cutting edge, the double-arc cutting edge is connected to the body to form an overflow groove, the neck is cylindrical, the neck and the body extend continuously to the head, the head is hexagonal, the head and the neck are fixedly connected, and the root apex, the body, the neck and the center of the head are all provided with connected fluid inlet holes.

[0005] As an optimization, the root apex also includes a cutting groove bottom surface and a top surface, the middle of the cutting groove bottom surface is a fluid inlet, the top surface is the surface at the top of the double-arc cutting edge, the double-arc cutting edge is two connected diagonal cutting edges, and the fluid inlet is on the rear side of the double-arc cutting edge.

[0006] As an optimization, the body includes an overflow groove and a cutting blade extension surface, the overflow groove is tangent to the bottom surface of the cutting groove, the cutting blade extension surface includes a gradient cutting blade, the cutting blade extension surface is tangent to the top surface, and the gradient cutting blade is connected to the double arc cutting blade.

[0007] As an optimization, the overflow groove is a variable radius surface, the cutting blade extension surface is a constant radius surface, the radius of the body increases from the root tip direction to the neck direction, and the cutting blade extension surface is tangent to the circumferential surface of the neck.

[0008] As an optimization, the fluid inlet hole is a circular hole with a constant diameter, the end of the fluid inlet hole is the fluid inlet, and a flow-increasing space protruding toward the top surface is provided in front of the fluid inlet.

[0009] The beneficial effects of the present invention are as follows: compared with the prior art, the drill bit for root bone drilling of the present invention solves the problem of drill feed rate through a specially designed double-arc cutting edge. The drill bit for root bone drilling of the present invention has been verified by experiments that when the drill bit rotates one circle, the drill bit penetrates 0.01mm, so that the particle size of cutting debris is less than 0.01mm, and the drilling depth of the mandibular bone for oral implantation is generally 10-18mm. Taking 15mm as an example, it only takes about 1500 revolutions to complete. In combination with the fluid inlet arranged on the rear side of the double-arc cutting edge, the coolant enters the drilling part from the fluid inlet for cooling. Due to the presence of the double-arc cutting edge on the front side, there will be no debris blocking the fluid inlet, thereby achieving a better cooling effect, greatly improving the treatment efficiency and effect of dentists. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Attached Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0011] Attached Figure 2 It is a schematic diagram of the overall details of the present invention.

[0012] Attached Figure 3 It is a schematic diagram of the rear axle side of the present invention.

[0013] Attached Figure 4 It is a front view schematic diagram of the present invention.

[0014] Attached Figure 5 It is a partially enlarged schematic diagram of the fluid inlet of the present invention.

[0015] Attached Figure 6 It is a partial enlarged schematic diagram of the flow-increasing space of the present invention.

[0016] Attached Figure 7 With attached Figure 8 It is a schematic diagram of the cross-section at different angles of the present invention.

[0017] Among them, 1 is the root tip, 2 is the body, 3 is the neck, 4 is the head, 5 is the fluid inlet hole, 101 is the double arc cutting edge, 102 is the cutting groove bottom surface, 103 is the top surface, 201 is the overflow groove, 202 is the cutting edge extension surface, 203 is the gradient cutting edge, 501 is the fluid inlet, and 502 is the flow increase space. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0021] like Figure 1 In the illustrated embodiment, a drill bit for drilling holes in root bones includes a rotary cutting drill, which includes a root apex 1, a body 2, a neck 3 and a head 4. The root apex 1 is provided with a double-arc cutting edge 101, and the double-arc cutting edge 101 is connected to the body 2 to form an overflow groove 201. The neck 3 is cylindrical, and the neck 3 and the body 2 extend continuously to the head 4. The head 4 is hexagonal and is fixedly connected to the neck 3. The root apex 1, the body 2, the neck 3 and the head 4 are all provided with connected fluid inlet holes 5 in the center.

[0022] like Figure 2 or Figure 4 As shown, the root apex 1 also includes a cutting groove bottom surface 102 and a top surface 103. The middle of the cutting groove bottom surface 102 is a fluid inlet 501, and the top surface 103 is the top surface of the double-arc cutting edge 101. The double-arc cutting edge 101 is two connected diagonal cutting edges, and the fluid inlet 501 is on the rear side of the double-arc cutting edge 101.

[0023] like Figure 2 As shown, the body 2 includes an overflow groove 201 and a cutting edge extension surface 202, the overflow groove 201 is tangent to the cutting groove bottom surface 102, the cutting edge extension surface 202 includes a gradient cutting edge 203, the cutting edge extension surface 202 is tangent to the top surface 103, and the gradient cutting edge 203 is connected to the double arc cutting edge 101.

[0024] like Figure 4 As shown, the overflow groove 201 is a variable radius surface, the cutting blade extension surface 202 is a constant radius surface, the radius of the body 2 from the root tip 1 direction to the neck 3 direction becomes larger and larger, and the cutting blade extension surface 202 is tangent to the circumferential surface of the neck 3.

[0025] like Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the fluid inlet hole 5 is a circular hole with a constant diameter. The end of the fluid inlet hole 5 is a fluid inlet 501 . A flow-increasing space 502 protruding toward the top surface 103 is provided in front of the fluid inlet 501 .

[0026] The apex 1, body 2, neck 3 and head 4 are four parts from front to back on the rotary cutting drill, the double arc cutting edge 101 is the main cutting part of the entire drill bit, the gradient cutting edge 203 is the secondary cutting part, and the gradient cutting edge 203 provides a blocking effect for the backflow of the coolant formed by the overflow groove 201.

[0027] The bottom surface 102 of the cutting groove is lower than the top surface 103, which is caused by the existence of the double-arc cutting edge 101 and the fluid inlet 501. Since the double-arc cutting edge 101 blocks about half of the fluid inlet 501, the flow increase space 502 is increased to expand the water output.

[0028] Due to the need for drilling, the overall radius of the body 2 becomes larger as it goes back, so the radius of the cutting blade extension surface 202 becomes larger as it gets closer to the neck 3, but it has a constant radius on the same cross section; and because the overflow groove 201 needs to drain water, a certain space must be formed, and when the overall radius of the body 2 becomes larger as it goes back, it has a variable radius on the same cross section.

[0029] Working principle: When the device is in use, the head 4 is first installed into the drill driver. When drilling, the entire rotary drill rotates toward the jawbone to drill. At this time, the coolant flows into the cutting part through the fluid inlet hole 5 to cool it down. At the same time, the coolant flushes the cutting debris along the overflow groove 201 until the drilling depth is reached to complete the dental implant drilling work.

[0030] A drill bit for drilling holes in root bones of the present invention solves the problem of drill bit feed rate through a specially designed double-arc cutting edge. It has been verified through experiments that the drill bit for drilling holes in root bones of the present invention penetrates 0.01mm when the drill bit rotates one circle, so that the particle size of cutting debris is less than 0.01mm. The drilling depth of the mandibular bone for oral implantation is generally 10-18mm. Taking 15mm as an example, it can be completed with only about 1500 revolutions. In combination with the fluid inlet arranged on the rear side of the double-arc cutting edge, the coolant enters the drilling part through the fluid inlet for cooling. Due to the presence of the double-arc cutting edge on the front side, the fluid inlet will not be blocked by debris, so that a better cooling effect can be exerted, which greatly improves the treatment efficiency and effect of dentists.

[0031] The above-mentioned specific embodiments are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the product form and style of the above-mentioned specific embodiments. Any drill bit for root bone drilling that complies with the claims of the present invention and any appropriate changes or modifications made thereto by ordinary technicians in the relevant technical field shall fall within the patent protection scope of the present invention.

Claims

1. A drill bit for drilling a root bone, characterized in that: The rotary cutting drill comprises a root apex (1), a body (2), a neck (3) and a head (4); the root apex (1) is provided with a double arc cutting edge (101), the double arc cutting edge (101) is connected to the body (2) to form an overflow groove (201); the neck (3) is cylindrical, the neck (3) and the body (2) extend continuously to the head (4); the head (4) is hexagonal, the head (4) and the neck (3) are fixedly connected; the root apex (1), the body (2), the neck (3) and the head (4) are all provided with connected fluid inlet holes (5) at the center; The root apex (1) further comprises a groove bottom surface (102) and a top surface (103), wherein the middle of the groove bottom surface (102) is a fluid inlet (501), and the top surface (103) is the surface at the top of the double-arc cutting edge (101), wherein the double-arc cutting edge (101) is two connected diagonally opposite cutting edges, and the fluid inlet (501) is located at the rear side of the double-arc cutting edge (101); The body (2) comprises an overflow groove (201) and a cutting edge extension surface (202), the overflow groove (201) is tangent to the cutting groove bottom surface (102), the cutting edge extension surface (202) comprises a gradual cutting edge (203), the cutting edge extension surface (202) is tangent to the top surface (103), and the gradual cutting edge (203) is connected to the double arc cutting edge (101); The overflow groove (201) is a variable radius surface, the cutting blade extension surface (202) is a constant radius surface, the radius of the body (2) increases from the root tip (1) to the neck (3), and the cutting blade extension surface (202) is tangent to the circumferential surface of the neck (3).

2. A drill bit for drilling a root bone according to claim 1, characterized in that: The fluid inlet hole (5) is a circular hole with a constant diameter. The end of the fluid inlet hole (5) is a fluid inlet (501). A flow-increasing space (502) protruding toward the top surface (103) is provided on the front side of the fluid inlet (501).

Images