A dental implant drill

Abstract

The application relates to the field of dental surgical instruments, in particular to a dental implant drill bit which comprises a mounting section, a cutting section for forming a predetermined depth implant socket in alveolar bone, and a guide section fixedly connected with the mounting section and the cutting section at two ends respectively, a plurality of guide surfaces are arranged in a circumferential array on the outer circumferential surface of the guide section, the guide surfaces are helically extended from one end of the guide section close to the mounting section to the other end close to the cutting section, the extension direction of the guide surfaces is opposite to the helical direction of the drill bit, so that when the drill bit rotates in the preset cutting direction, the fluid located in the guide section can be pushed to the cutting section in the axial direction. The application achieves the technical effects of accelerating the flow of the cooling liquid and improving the cooling efficiency.

Description

Technical Field

[0001] This application relates to the field of dental surgical instruments, and in particular to a drill bit for dental implantation. Background Technology

[0002] Dental implant restoration is currently the mainstream method for restoring missing teeth. During the implant surgery, the dentist uses a dental implant drill to create a precisely sized implant socket in the patient's alveolar bone to insert the implant. During the drilling process, the high-speed rotation of the drill and friction with the bone tissue generate a large amount of heat. If the temperature is too high, it can lead to bone cell necrosis, also known as bone thermal injury. This can severely affect the osseointegration between the implant and the alveolar bone, and may even lead to implant surgery failure.

[0003] To address this issue, existing technologies typically employ external flushing, spraying saline or other cooling fluids onto the surgical area during bone drilling to lower the temperature. However, during alveolar bone drilling, bone chips are ejected upwards from deep within the borehole, in the opposite direction to the flow of the cooling fluid. Furthermore, friction exists between the bone chips and the drill bit. This friction, along with the upward force exerted by the moving bone chips, hinders the flow of the cooling fluid, resulting in insufficient cooling. Therefore, there is an urgent need in the field for a dental implant drill bit that can improve cooling efficiency and ensure adequate cooling of the cutting area. Utility Model Content

[0004] The purpose of this application is to overcome the above-mentioned technical problems and provide a drill bit for dental implantation.

[0005] A dental implant drill bit, comprising: Installation section; The cutting segment, used to form an implant socket of predetermined depth in the alveolar bone, and The guide section has two ends fixedly connected to the mounting section and the cutting section, respectively. The outer circumferential surface of the guide section is provided with a plurality of guide surfaces in a circular array. The guide surfaces extend spirally from one end of the guide section near the mounting section to one end near the cutting section, and the extension direction is opposite to the spiral direction of the drill bit. This allows the fluid located in the guide section to be pushed axially towards the cutting section when the drill bit rotates in its preset cutting direction.

[0006] By adopting the above scheme, a channel for coolant to flow is formed between the guide surface and the planting guide plate. During the rotation of the drill bit, coolant is sprayed into the gap. The guide surface rotates with the drill bit, thereby squeezing the coolant downward and accelerating the flow of coolant, thus achieving a better cooling effect. The design of the guide surface allows the coolant to flow along a smooth inclined surface, avoiding the formation of chaotic turbulence caused by the coolant contacting complex surfaces. At the same time, the inclined surface design makes it easier to grind and has a smaller contact area with the coolant, which can effectively reduce friction.

[0007] In one embodiment, the guide section includes a stop edge connected to the mounting section, the stop edge having a water inlet surface, and the guide surface smoothly transitioning to the water inlet surface.

[0008] By adopting the above scheme, when the drill bit drills to a certain depth, the stop edge abuts against the top of the planting guide plate, preventing the drill bit from going deeper. By setting the water inlet surface, the stop edge is prevented from blocking the opening of the planting guide plate, allowing the coolant to flow into the channel formed between the guide surface and the planting guide plate.

[0009] In one embodiment, the cutting section further includes a transition portion located between the cutting section and the guide section, the outer peripheral surface of the transition portion being funnel-shaped with an opening facing the guide section.

[0010] By adopting the above scheme, since the radii of the guide section and the cutting section are different, the transition section is set in a funnel shape, which makes the connection between the guide section and the cutting section smoother and avoids friction between the stepped surface formed between the guide section and the cutting section and the drilling part.

[0011] In one embodiment, the cutting section includes a drill body, which includes a plurality of cutting edges arranged in a circumferential array. The surface of each cutting edge facing the direction of rotation of the drill bit is a cutting surface, and the surface facing away from the direction of rotation of the drill bit is a chip removal surface. A cutting space is formed between the cutting surface of the cutting edge and the chip removal surface of the adjacent cutting edge. The plurality of cutting spaces extend toward the transition portion and divide the transition portion.

[0012] By adopting the above scheme, the cutting surface is used to cut the bone, and the bone chips produced after the drill bit cut are contained in the cutting space.

[0013] In one embodiment, the chip removal surface on the transition portion forms an arc surface that extends toward the outer peripheral surface of the guide segment, and the cutting surface of the cutting edge and the chip removal surface of the adjacent cutting edge are perpendicular to each other.

[0014] By adopting the above scheme, during the rotation of the drill bit, the cutting surface is perpendicular to the direction of the drill bit's rotation, thereby cutting the bone. When the transition section is about to move to the drilling point, the cutting surface squeezes the bone chips, and the bone chips are discharged along the arc-shaped part of the chip removal surface.

[0015] In one embodiment, each of the cutting edges is provided with scale lines along its length.

[0016] By adopting the above method, when the user does not use a dental implant guide, the depth of the hole can be observed through the scale lines.

[0017] In one embodiment, the outer peripheral surface of the mounting section is provided with a color ring for distinguishing drill bits of different diameters.

[0018] By adopting the above solution, color rings are set at the installation section, and different diameter drill bits are set with different colored rings to facilitate user differentiation.

[0019] In one embodiment, the outer peripheral surface of the guide segment is also provided with a plurality of spirally extending chip removal grooves in a circumferential array, each chip removal groove being located between two adjacent guide surfaces, and the spiral direction of the chip removal groove being opposite to the spiral direction of the guide surface.

[0020] By adopting the above solution, when the user drills using the implant guide plate, bone chips are discharged from the gap between the guide section and the implant guide plate. Since the discharge direction of the bone chips is opposite to the flow direction of the condensate, the bone chips will hinder the flow of the condensate. With the setting of the chip discharge groove, the bone chips can be discharged along the chip discharge groove, so as not to affect the flow of the condensate along the guide surface. The rotation direction of the chip discharge groove is opposite to the spiral rotation direction of the guide surface. During the rotation of the drill bit, the chip discharge groove can squeeze the bone chips upward, thereby accelerating the discharge of bone chips.

[0021] In one embodiment, the stop edge is provided with a chip removal notch, the end of the chip removal groove near the cutting section is connected to the guide surface, and the end of the chip removal groove away from the cutting section is connected to the chip removal notch.

[0022] By adopting the above scheme, during the rotation of the drill bit, the coolant pushed by the guide surface will partially flow into the chip removal groove, thereby impacting the bone chips and accelerating their movement within the chip removal groove.

[0023] In one embodiment, the end of the chip removal groove near the cutting section is connected to the cutting space, and the sidewall of the chip removal groove is tangent to the cutting surface.

[0024] By adopting the above scheme, bone chips in the cutting space can directly enter the chip removal groove along the cutting surface.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting the guide surface, a channel for coolant to flow is formed between the guide surface and the planting guide plate. During the rotation of the drill bit, coolant is sprayed into the gap. The guide surface rotates with the drill bit, thereby squeezing the coolant downward and accelerating the flow of coolant, thus achieving a better cooling effect. The setting of the guide surface allows the coolant to flow along the smooth inclined surface, avoiding the formation of chaotic turbulence caused by the coolant contacting complex surfaces. At the same time, the inclined surface design makes it easier to grind and has a smaller contact area with the coolant, which can effectively reduce friction.

[0026] 2. When the user drills using the implant guide plate, bone chips are discharged from the gap between the guide section and the implant guide plate. Since the discharge direction of the bone chips is opposite to the flow direction of the condensate, the bone chips will hinder the flow of the condensate. Through the setting of the chip discharge groove, the bone chips can be discharged along the chip discharge groove, so as not to affect the flow of the condensate along the guide surface. The rotation direction of the chip discharge groove is opposite to the spiral rotation direction of the guide surface. During the rotation of the drill bit, the chip discharge groove can squeeze the bone chips upward, thereby accelerating the discharge of bone chips.

[0027] 3. By connecting the chip removal groove to the guide surface and the chip removal groove to the cutting space, during the rotation of the drill bit, the coolant pushed by the guide surface will partially flow into the chip removal groove, thereby impacting the bone chips and accelerating the movement of the bone chips in the chip removal groove. The bone chips in the cutting space can directly enter the chip removal groove along the cutting surface. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a dental implant drill bit provided in the first embodiment of this application.

[0029] Figure 2 This is a cross-sectional view of the guide segment of the first embodiment of this application.

[0030] Figure 3 This is a cross-sectional view of the drill body according to the first embodiment of this application.

[0031] Figure 4 This is a schematic diagram of the structure of a dental implant drill bit provided in the second embodiment of this application.

[0032] Figure 5 This is a cross-sectional view of the guide segment of the second embodiment of this application.

[0033] Explanation of reference numerals in the attached drawings: 1. Installation section; 11. Color ring; 2. Cutting section; 21. Drill body; 211. Cutting edge; 2111. Cutting surface; 2112. Chip removal surface; 2113. Cutting space; 2114. Scale line; 22. Transition section; 3. Guide section; 31. Guide surface; 32. Stop edge; 321. Water inlet surface; 322. Chip removal notch; 33. Chip removal groove. Detailed Implementation

[0034] This application provides a dental implant drill bit that can improve cooling efficiency and ensure that the cutting area is adequately cooled.

[0035] Example 1 Please see Figure 1-3 , Figure 1 This is a schematic diagram of the structure of a dental implant drill bit provided in the first embodiment of this application. The dental implant drill bit provided in the first embodiment of this application includes an installation section 1, a cutting section 2, and a guide section 3. The two ends of the guide section 3 are fixedly connected to the installation section 1 and the cutting section 2, respectively. The guide surface 31 on the outer peripheral surface of the guide section 3 can push the fluid towards the cutting section 2, achieving a better cooling effect. The guide surface 31 and the implant guide plate form a channel for the condensate to flow through. When rotating, it can squeeze the coolant to accelerate its flow. Moreover, the guide surface 31 is smooth and spirally extended, which can avoid the formation of turbulence in the coolant and reduce friction.

[0036] The guide section 3 includes multiple guide surfaces 31. These guide surfaces 31 are arranged in a circumferential array on the outer periphery of the guide section 3, extending spirally from the end of the guide section 3 near the mounting section 1 towards the end near the cutting section 2, with the direction of extension opposite to the spiral direction of the drill bit. The structure of the guide surfaces 31 facilitates grinding and machining, and its small contact area with the coolant effectively reduces friction. A gap is formed between the guide surfaces 31 and the planting guide plate. During drill bit rotation, coolant is sprayed into this gap. As the guide surfaces 31 rotate with the drill bit, they act similarly to propeller blades, squeezing the coolant downwards and accelerating its flow.

[0037] The guide section 3 also includes a stop edge 32 connected to the installation section 1. The stop edge 32 has a water inlet surface 321, and the guide surface 31 smoothly transitions to the water inlet surface 321. The stop edge 32 is an annular structure, and its function is to abut against the top of the planting guide plate when the drill bit penetrates to a certain depth, preventing the drill bit from penetrating further. The water inlet surface 321 prevents the stop edge 32 from blocking the opening of the planting guide plate, allowing coolant to flow into the gap formed between the guide surface 31 and the planting guide plate.

[0038] The cutting section 2 includes a transition portion 22 located between the cutting section 2 and the guide section 3. The outer peripheral surface of the transition portion 22 is funnel-shaped, opening towards the guide section 3. Because the radii of the guide section 3 and the cutting section 2 are different, the transition portion 22 is funnel-shaped to make the connection between the guide section 3 and the cutting section 2 smoother, preventing friction between the stepped surface formed between the guide section 3 and the cutting section 2 and the drilling area. The material of the transition portion 22 can be the same as that of the cutting section 2 and the guide section 3, generally a high-strength metal material, such as stainless steel.

[0039] The cutting section 2 also includes a drill body 21. The drill body 21 includes multiple cutting edges 211 arranged in a circumferential array. The surface of each cutting edge 211 facing the drill's rotation direction is the cutting surface 2111, and the surface facing away from the drill's rotation direction is the chip removal surface 2112. A cutting space 2113 is formed between the cutting surface 2111 of the cutting edge 211 and the chip removal surface 2112 of the adjacent cutting edge 211. Multiple cutting spaces 2113 extend towards and divide the transition section 22. The cutting surface 2111 is used to cut bone, and the bone chips generated after the drill cutting are contained in the cutting space 2113. The cutting edge 211 is typically made of cemented carbide to ensure its cutting performance. The cutting edge 211 can be a coated tool; the coating can improve the wear resistance and corrosion resistance of the cutting edge 211. The shape of the cutting edge 211 can have a certain curvature to better adapt to the structure of the bone.

[0040] The chip removal surface 2112 on the transition section 22 forms an arc surface that extends towards the outer peripheral surface of the guide section 3. The cutting surface 2111 of the cutting edge 211 and the chip removal surface 2112 of the adjacent cutting edge 211 are perpendicular to each other. During the rotation of the drill bit, the cutting surface 2111 is perpendicular to the direction of drill bit rotation, thereby cutting the bone. When the transition section 22 is about to move to the drill hole, the cutting surface 2111 squeezes the bone chips, which are discharged along the arc-shaped portion of the chip removal surface 2112. The arc-shaped design of the chip removal surface 2112 facilitates the discharge of bone chips and avoids their accumulation. The arc surface of the chip removal surface 2112 can have a variable curvature, with a larger curvature near the cutting section 2 for quick bone chip discharge, and a smaller curvature near the guide section 3 for smoother bone chip discharge.

[0041] In this embodiment, each cutting edge 211 has a scale line 2114 along its length. When the user is not using the implant guide plate, the drilling depth can be observed through the scale line 2114. The scale line 2114 can be etched on the surface of the cutting edge 211 or formed by laser marking. The outer peripheral surface of the mounting section 1 is provided with color rings 11 to distinguish drill bits of different diameters. Different diameter drill bits are provided with different colored color rings 11 for easy differentiation by the user. The color rings 11 can be paint coated on the surface of the mounting section 1 or colored stickers.

[0042] The working principle of this embodiment is as follows: A gap is formed between the guide surface 31 and the implantation guide plate. During the rotation of the drill bit, coolant is sprayed into the gap. The guide surface 31 rotates with the drill bit, thereby squeezing the coolant downward and accelerating the flow of the coolant, thus achieving a better cooling effect. The design of the guide surface 31 allows the coolant to flow along a smooth spiral surface, avoiding the formation of chaotic turbulence due to contact between the coolant and complex surfaces. At the same time, the spiral extension of the guide surface design makes it easier to grind, and the contact area with the coolant is smaller, which can effectively reduce friction and prevent the friction between bone chips and the drill bit from hindering the flow of coolant.

[0043] Example 2 Please see Figure 4-5 , Figure 4 This is a schematic diagram of the structure of a dental implant drill bit provided in the second embodiment of this application. The structure of this embodiment is basically the same as the previous embodiment, except that: the outer circumferential surface of the guide section 3 is also provided with a plurality of spirally extending chip removal grooves 33 in a circular array. Each chip removal groove 33 is located between two adjacent guide surfaces 31, and the spiral direction of the chip removal groove 33 is opposite to the spiral direction of the guide surface 31. The chip removal groove 33 is constructed as a spiral groove with a "V"-shaped cross-section. Its function is to allow bone chips to be discharged along the chip removal groove 33 when the user drills using an implant guide plate, thus not affecting the flow of condensate along the guide surface 31. The depth and width of the chip removal groove 33 can be designed according to actual conditions to ensure that bone chips can be discharged smoothly.

[0044] A chip removal notch 322 is provided along the stop edge 32. The chip removal groove 33, at one end near the cutting section 2, communicates with the guide surface 31, and at the other end away from the cutting section 2, communicates with the chip removal notch 322. During drill rotation, the coolant pushed by the guide surface 31 partially flows into the chip removal groove 33, impacting the bone chips and accelerating their movement within the groove. The size and shape of the chip removal notch 322 must ensure smooth discharge of bone chips while also allowing for normal coolant inflow. The chip removal groove 33, at one end near the cutting section 2, communicates with the cutting space 2113, and its sidewall is tangent to the cutting surface 2111. During drill cutting, bone chips in the cutting space 2113 can directly enter the chip removal groove 33 along the cutting surface. The connection between the chip removal groove 33 and the cutting space 2113 must ensure smooth entry of bone chips from the cutting space 2113 into the chip removal groove 33.

[0045] The working principle of this embodiment is as follows: When the user drills using the implant guide plate, bone chips are discharged from the gap between the guide section 3 and the implant guide plate. Since the discharge direction of the bone chips is opposite to the flow direction of the condensate, the bone chips will hinder the flow of the condensate. Through the setting of the chip discharge groove 33, the bone chips can be discharged along the chip discharge groove 33, so as not to affect the flow of the condensate along the guide surface 31. The rotation direction of the chip discharge groove 33 is opposite to the spiral rotation direction of the guide surface 31. During the rotation of the drill bit, the chip discharge groove 33 can squeeze the bone chips upward, thereby accelerating the discharge of bone chips.

[0046] Meanwhile, the chip removal groove 33 is connected to the guide surface 31 and also to the cutting space 2113. During the rotation of the drill bit, the coolant pushed by the guide surface 31 will partially flow into the chip removal groove 33, thereby impacting the bone chips and accelerating the movement of the bone chips in the chip removal groove 33. The bone chips in the cutting space 2113 can directly enter the chip removal groove 33 along the cutting surface, thereby effectively guiding the bone chips out, preventing the accumulation of bone chips from hindering the flow of coolant, and also reducing the damage to the tissues around the drill hole.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dental implant drill bit, characterized in that, include: Installation section (1); The cutting segment (2) is used to form an implant socket of a predetermined depth in the alveolar bone, and The guide section (3) is fixedly connected to the mounting section (1) and the cutting section (2) at both ends. The outer circumferential surface of the guide section (3) is provided with a plurality of guide surfaces (31) in a circular array. The guide surfaces (31) extend spirally from one end of the guide section (3) near the mounting section (1) to one end near the cutting section (2), and the extension direction is opposite to the spiral direction of the drill bit. This allows the fluid located in the guide section (3) to be pushed axially towards the cutting section (2) when the drill bit rotates in its preset cutting direction. The guide section (3) includes a stop edge (32) connected to the mounting section (1), the stop edge (32) is provided with a water inlet surface (321), and the guide surface (31) smoothly transitions to the water inlet surface (321); The cutting section (2) also includes a transition section (22) located between the cutting section (2) and the guide section (3), the outer peripheral surface of the transition section (22) being funnel-shaped with an opening facing the guide section (3).

2. The dental implant drill bit according to claim 1, characterized in that: The cutting section (2) includes a drill body (21), which includes a plurality of cutting edges (211) arranged in a circumferential array. The surface of each cutting edge (211) facing the rotation direction of the drill bit is the cutting surface (2111), and the surface facing away from the rotation direction of the drill bit is the chip removal surface (2112). A cutting space (2113) is formed between the cutting surface (2111) of the cutting edge (211) and the chip removal surface (2112) of the adjacent cutting edge (211). The plurality of cutting spaces (2113) extend toward the transition section (22) and divide the transition section (22).

3. A dental implant drill bit according to claim 2, characterized in that: The chip removal surface (2112) on the transition section (22) forms an arc surface that extends toward the outer peripheral surface of the guide section (3). The cutting surface (2111) of the cutting edge (211) and the chip removal surface (2112) of the adjacent cutting edge (211) are perpendicular to each other.

4. A dental implant drill bit according to claim 2, characterized in that: Each of the cutting edges (211) has a scale line (2114) along its length.

5. A dental implant drill bit according to claim 1, characterized in that: The outer circumferential surface of the mounting section (1) is provided with a color ring (11) for distinguishing drill bits of different diameters.

6. A dental implant drill bit according to claim 2, characterized in that: The outer peripheral surface of the guide section (3) is also provided with a plurality of spirally extending chip removal grooves (33) in a circular array. Each chip removal groove (33) is located between two adjacent guide surfaces (31), and the spiral direction of the chip removal groove (33) is opposite to the spiral direction of the guide surface (31).

7. A dental implant drill bit according to claim 6, characterized in that: The stop edge (32) is provided with a chip removal notch (322), the chip removal groove (33) is connected to the guide surface (31) at one end near the cutting section (2), and the chip removal groove (33) is connected to the chip removal notch (322) at one end away from the cutting section (2).

8. A dental implant drill bit according to claim 6, characterized in that: The chip removal groove (33) is connected to the cutting space (2113) at one end near the cutting section (2), and the side wall of the chip removal groove (33) is tangent to the cutting surface (2111).

Images