WO2020130601A1

WO2020130601A1 - Dental drill bit

Info

Publication number: WO2020130601A1
Application number: PCT/KR2019/017927
Authority: WO
Inventors: 정지원
Original assignee: 정지원
Priority date: 2018-06-29
Filing date: 2019-12-17
Publication date: 2020-06-25
Also published as: KR102033129B1

Abstract

A dental drill bit is disclosed. A dental drill bit according to one aspect of the present invention comprises: a coupling part rotatably coupled to a dental apparatus; a drill part extending in the rotation axis direction of the coupling part and having a blade for boring; and a cooling part disposed between the coupling part and drill part on the rotation axis and having a cooling water accommodation space which is formed through from an injection port on the coupling part to a discharge port on the drill part, wherein a cooling water is injected from the injection port, stays in the cooling water accommodation space and absorbs heat, and then is discharged through the discharge port.

Description

Dental drill bits

The present invention relates to a dental drill bit. More specifically, when forming a hole in the oral cavity for dental treatment, it relates to a dental drill bit capable of effectively supplying a physiological saline solution having a cooling effect on a drilling operation.

In dental treatments such as implant procedures, drilling is required to create holes in the oral cavity. Due to the high rotational speed, there is a risk of necrosis of tissue by generating high heat in the jaw bone, which is the target of treatment. Accordingly, a method of cooling the heat due to drilling is used by supplying physiological saline to the drill bit. Conventionally, a method of supplying saline through a central axis of the drill bit and a method of pouring a saline solution on the surface of the drill bit have been developed.

However, in the method of supplying saline through the internal passage through the center of the drill bit, blood easily flows into the inside of the drill bit and is difficult to remove by washing, and there is a risk of infection, etc. It is difficult to check with the naked eye, and there is a problem of secondary infection.

On the other hand, the guide procedure is spreading for precise drilling, and the method of flowing coolant on the surface of the drill bit has a problem that is not suitable for the guide procedure. This is because it is difficult to obtain sufficient cooling because the guide protruding from the drill bit prevents physiological saline from flowing to the treatment site.

[Advanced technical literature]

Patent Document 1: Korean Registered Patent Publication No. 10-1442696

An embodiment of the present invention is to provide a dental drill bit capable of effectively cooling a drill bit with coolant in a drilling operation for dental treatment.

In addition, to provide a dental drill bit that is easy to clean for removing blood after drilling.

In addition, it is to easily check the occurrence of corrosion in the drill, and when corrosion occurs, replace the drill to prevent secondary infection.

According to an aspect of the present invention, a coupling portion rotatably coupled to a dental device, a drill portion extending in the direction of the rotational axis of the coupling portion, and a drill portion formed with a perforation processing, and between the coupling portion and the drill portion on the rotation axis It is disposed and includes a cooling unit having a cooling water receiving space having a structure penetrating from the injection port on the side of the coupling portion to the discharge port on the side of the drill, and cooling water is injected from the injection port, and stays in the cooling water receiving space to absorb heat, A dental drill bit discharged through the outlet is provided.

At this time, the cooling unit, spaced apart from the inner shaft and the inner shaft connected in the rotational axis direction from the coupling portion, and includes an outer ring surrounding the inner shaft, a cooling water receiving space is formed between the inner shaft and the outer ring Can be.

In addition, it is formed between the cooling portion and the drill portion and has a protruding structure with a larger diameter than the drill portion, and may further include a guide portion inserted into the guide hole of the external member.

At this time, a cooling water path flowing through the cooling part discharged from the cooling water receiving space to the drill part may be formed in the guide part.

At this time, the cooling part and the guide part are formed of an integral body, and the cooling water path having a concave groove structure may be formed on the outer peripheral surface of the guide part.

In addition, the cooling water path may be connected to the cooling water receiving space.

At this time, the outlet includes a slot formed along the circumference of the body, and a plurality of cooling water paths may be connected to the slot.

In addition, the cooling unit and the guide unit are formed of an integral body, the cooling water receiving space is an inner space of the body, and the outlet may be formed on the outer circumferential surface of the body.

On the other hand, it protrudes in the radial direction than the guide portion, it may not include a stopper portion that is not inserted into the guide hole to limit the processing depth of the drill portion.

In addition, the cooling water path formed in the guide portion may extend continuously to the end of the drill portion.

In addition, the outlet may include a plurality of holes formed spaced apart from each other along the circumference of the body.

At this time, in the inner space of the body, an internal path of the coolant having a concave groove structure may be formed on the outer circumferential surface of the inner shaft.

In addition, the plurality of holes, the inner space of the body may be formed to open to the side of the body and the side of the drill.

On the other hand, the body is cylindrical, and an outer circumferential surface of the guide portion may be formed with an incision disposed adjacent to the cooling water path.

According to another aspect of the present invention, the coupling portion rotatably coupled to the dental device, extending in the direction of the rotational axis of the coupling portion, between the coupling portion and the drill portion on the rotary shaft and a drill portion formed with a cutting edge It is disposed on, and includes a cooling unit having a cooling water groove having a concave surface facing toward the coupling portion to form a cooling water receiving space, and the cooling water groove is formed at an inlet and an inner wall facing the coupling portion and opened toward the drill portion. A dental drill bit is provided that includes a discharge port, coolant is injected from the inlet port, and stays in the cooling water receiving space to absorb heat, and then discharged to the outlet port.

At this time, it is formed between the cooling portion and the drill portion, the diameter of the drill portion is formed larger and has a protruding structure, it may further include a guide portion inserted into the guide hole of the external member.

According to the embodiment of the present invention, the coolant stays in the coolant receiving space to effectively absorb heat and the coolant absorbing heat is easily discharged by centrifugal force by rotation, thereby facilitating heat release of the drill bit by the coolant. .

In addition, it is easy to access the cooling water receiving space, such as a washing brush, so that the cooling water receiving space can be easily washed to remove blood after drilling, and it is possible to easily check the corrosion of the drill itself and check the replacement cycle. .

1 is a perspective view showing a dental drill bit according to an embodiment of the present invention.

2 is a front view (a) and a side view (b) showing a dental drill bit according to an embodiment of the present invention.

3 is an enlarged view of a cooling unit of a dental drill bit according to an embodiment of the present invention.

4 is a view for explaining the cooling process by the cooling water in the dental drill bit according to an embodiment of the present invention.

5 is a front view showing a modification of the dental drill bit according to an embodiment of the present invention.

6 is an enlarged view of a cooling part of the dental drill bit according to FIG. 5.

7 to 13 are views showing other modified examples of the dental drill bit according to an embodiment of the present invention.

14 is a front view showing a dental drill bit according to another embodiment of the present invention.

15 and 16 are enlarged views of a cooling unit of a dental drill bit according to another embodiment of the present invention.

17 and 18 are views showing other modified examples of the dental drill bit according to another embodiment of the present invention.

5: Coolant

10, 610: coupling portion

20, 20', 120, 220, 320, 420, 520, 620: cooling unit

22, 122, 322, 622: inner shaft

24, 124, 224: outer ring

25, 125, 625: cooling water storage space

26, 626: inlet

27, 28, 127, 227, 328, 428, 528, 627: outlet

30, 130, 230, 330, 430, 530, 630: guide

32, 232, 532, 632: coolant path

40, 240, 440, 640: drill

The terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In the present application, when a part “includes” a certain component, it means that the component may further include other components, not to exclude other components, unless otherwise stated. In addition, in the entire specification, "top" means that it is located above or below the target part, and does not necessarily mean that it is positioned above the center of gravity.

In addition, the combination does not mean only a case in which a physical contact is directly made between the respective components in a contact relationship between the components, and different components are interposed between the respective components, so that the components are in different components. Use it as a comprehensive concept until each contact is made.

Further, terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from other components.

Since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to what is shown.

Hereinafter, an embodiment of the dental drill bit according to the present invention will be described in detail with reference to the accompanying drawings, and in describing with reference to the accompanying drawings, identical or corresponding components are assigned the same reference numbers and overlapped therewith. The description will be omitted.

1 is a perspective view showing a dental drill bit according to an embodiment of the present invention, and FIG. 2 is a front view (a) and a side view (b) showing the dental drill bit according to an embodiment of the present invention.

1 and 2, the dental drill bit according to an embodiment of the present invention includes a coupling part 10, a drill part 40 and a cooling part 20.

The engaging portion 10 is a portion that is rotatably coupled to the dental device. For example, the engaging portion 10 may be fitted to the dental hand-piece (dental hand-piece).

1 and 2, the coupling portion 10 may be formed at one end of a drill bit having a rotation axis shape as a whole. At this time, the coupling portion 10 may have a shape in which a part of the rotation shaft is cut. The rotational axis of the dental device is also formed to correspond to the cut-out shape of the coupling portion 10, and can be engaged with the coupling portion 10 to form one rotating shaft.

The drill part 40 is a part in which a blade for drilling a hole is formed, and is formed to extend in the direction of the rotation axis of the coupling part 10.

1 and 2, the drill portion 40 may have a twist drill type blade. At this time, the number of blades can be variously changed according to the purpose. In addition, the drill portion 40 may be provided with a variety of drilling blades other than the drill type.

The cooling unit 20 forms a path through which the coolant flows and a space where the coolant stays and absorbs heat so that the coolant cools the heat generated by the drill bit. The cooling part 20 is disposed between the coupling part 10 and the drill part 40 on the rotation axis of the drill bit. In addition, the cooling unit 20 is formed with a cooling water receiving space 25 having a structure penetrating from the inlet 26 on the side of the coupling portion 10 to the outlet 27 on the side of the drill portion 40.

3 is an enlarged view of the cooling unit 20 of the dental drill bit according to an embodiment of the present invention.

1 to 3, the cooling unit 20 of the present embodiment may have a ring shape spaced apart from the center of the drill bit to form a cooling water receiving space 25.

Specifically, the cooling unit 20 includes an outer shaft 24 spaced apart from the inner shaft 22 and the inner shaft 22 connected in the rotational axis direction from the coupling portion 10, and surrounding the inner shaft 22, A cooling water receiving space 25 may be formed between the inner shaft 22 and the outer ring 24. The coolant receiving space 25 between the inner shaft 22 and the outer ring 24 has a ring shape, and an upper surface facing the coupling portion 10 and a lower surface facing the drill portion 40 are formed. Accordingly, the inlet 26 opened to the coupling portion 10 side is formed, and the outlet 27 opened to the drill portion 40 side may be formed.

Particularly, since the inlet 26 which opens the coupling portion 10 to the side is an open structure in the longitudinal direction of the drill bit (that is, an open structure when the drill bit is erected), it is a structure that is easy to pour coolant from top to bottom, such as a brush It is also easy to insert.

On the other hand, the cooling water receiving space 25 of the cooling unit 20 is not limited to the above-described structure, and various types of connections from the surface of the cooling unit 20 to the surface through the cooling water receiving space 25 therein. Includes spatial structure.

In addition, a guide unit 30 may be formed between the cooling unit 20 and the drill unit 40, for example, connected from the cooling unit 20 toward the drill unit 40. The guide part 30 is a part inserted into a guide hole (not shown) of an external member (not shown) used in the guide procedure.

1 to 3, the guide portion 30 has a cylindrical structure as a whole, and the guide portion 30 has a larger diameter than the drill portion 40 and may have a structure protruding in the radial direction.

In addition, a cooling water path 32 in which cooling water discharged from the cooling water receiving space 25 flows into the drill part 40 may be formed in the guide part 30. Specifically, the cooling unit 20 and the guide unit 30 are formed of an integral body, and a cooling water path 32 having a concave groove structure may be formed on the outer circumferential surface of the guide unit 30.

At this time, the cooling water path 32 may be connected to the cooling water receiving space 25. In this embodiment, a plurality of coolant paths 32 on the outer circumferential surface of the guy portion are formed in the longitudinal direction of the drill bit and may be arranged side by side with each other. In addition, the outlet 27 includes a slot formed along the periphery of the body, and a plurality of coolant paths 32 may be connected to one slot.

Referring to FIGS. 1 to 3, slots are formed in the circumferential direction on the front and rear surfaces of the drill bit, and three cooling water paths 32 are connected to each slot serving as the outlet 27. .

Meanwhile, a stopper portion for limiting a depth processed by the drill portion 40 of the drill bit may be formed on the drill bit. The stopper portion is formed to protrude in the radial direction from the guide portion 30, it is not inserted into the guide hole and can be caught at the entrance of the guide hole to limit the processing depth of the drill portion 40.

1 to 3, the outer ring 24 in this embodiment also serves as a stopper portion. The outer ring 24 has a larger diameter than the guide portion 30 and has a shape protruding in the radial direction from the guide portion 30. The guide portion 30 may have a shape other than the outer ring 24, for example, various shapes such as a radial projection, and may be formed separately from the outer ring 24.

Referring to FIG. 4, the cooling water 5 is injected from the inlet 26 opened toward the coupling portion 10, and stays in the cooling water receiving space 25 to absorb heat, and then passes through a path discharged to the outlet 27 It can absorb the heat of the drill bit. At this time, since the cooling water receiving space 25 has a structure blocked in the radial direction, even if the drill bit is rotated, the cooling water 5 is scattered immediately and does not fly away, and can remain in the cooling water receiving space 25 to absorb heat. . In addition, when some of the coolant 5 is discharged to the outlet 27 by centrifugal force, the coolant 5 is re-filled with the space, so that the coolant 5 is introduced into the coolant receiving space 25 and absorbs heat. After this, a continuous heat dissipation process may be performed. Meanwhile, the discharged cooling water 5 may flow toward the drill unit 40 along the cooling water 5 path 32 of the guide unit 30.

Therefore, in the drill bit of the present invention, the cooling water 5 stays in the cooling water receiving space 25 to effectively absorb heat, and the cooling water 5 absorbing heat is easily discharged by centrifugal force due to rotation, thereby cooling water 5 The heat dissipation of the drill bit can be facilitated.

In addition, since the cooling water receiving space 25 is formed around the inner shaft 22, access to the cooling water receiving space 25 is easy, such as washing brushes, and the cooling water receiving space 25 is used for removing blood after drilling. Easy to clean.

5 is a front view showing a modification of the dental drill bit according to an embodiment of the present invention, and FIG. 6 is an enlarged view of the cooling part of the dental drill bit according to FIG. 5.

In the cooling part 20 ′ of the drill bit according to the present embodiment, the structure of the outlet 28 may be formed differently from the above-described embodiment.

5 and 6, the outlet 28 may include a plurality of holes formed spaced apart from each other along the circumference of the body. In addition, a plurality of coolant paths 32 formed in the guide unit 30 may be connected to the hole-shaped outlet 28 in a one-to-one correspondence.

Referring to FIG. 7, unlike the above-described embodiment, the outer ring 124 of the cooling unit is separated from the guide unit 130 without being connected. At this time, the spaced apart portion between the outer ring 124 and the guide portion 130 forms the outlet 127. On the other hand, between the inner shaft 122 and the outer ring 124, a connecting bar 123 supporting the outer ring 124 is interposed, so that the coolant receiving space 125 is formed, and the outer ring 124 can be maintained. have.

Referring to FIG. 8, the cooling water path 232 formed in the guide part 230 may be formed to continuously extend to the end of the drill part 240. For example, the cooling water path 232 may have a helical groove structure passing through both the guide portion 230 and the drill portion 240. In addition, the cooling water path 232 directly leads to the cooling water receiving space inside the outer ring 224, so that the end of the cooling water path 232 may form an outlet 237.

9 and 10, when the cooling unit 320 and the guide unit 330 are formed as an integral body, the cooling water receiving space of the cooling unit 320 is extended to the guide unit 330 in the body. Space can be formed. At this time, the outlet (328, 328') may be in the form of a plurality of holes formed spaced apart from each other along the circumference of the body. Accordingly, the cooling water accommodating space is sufficiently expanded in accordance with the required cooling demand, and the

outlets

328 and 328 ′ can also be largely formed.

In addition, a coolant inner path 323 having a concave groove structure may be formed on the outer circumferential surface of the inner shaft 322 in the inner space of the body. For example, the cooling water internal path 323 may have a spiral path passing through both the cooling unit 320 and the guide unit 330.

Accordingly, even if the cooling water receiving space becomes large, the cooling water does not stagnate in the cooling water receiving space, and the cooling water can be smoothly transferred through the cooling water internal path 323.

11 and 12, the cooling parts 420 and 420' and the guide parts 430 and 430' are formed in an integral body, and a plurality of holes open the inner space of the body toward the side of the body and the side of the drill part. Can be formed. That is, the

discharge ports

428 and 428 ′ may be opened through a plurality of holes on the side facing the drill portion 440 as well as the side of the body.

Referring to FIG. 11, when the body has a cylindrical structure, a portion of the side surface and the bottom surface (a surface facing the drill portion) may be cut to form an open outlet 428 as shown below and below. Accordingly, when the dental drill bit rotates, the coolant may continuously move toward the drill portion 440 after being discharged to the side of the body by centrifugal force.

Referring to FIG. 12, a body formed integrally with the cooling unit 420 ′ and the guide unit 430 ′ may be detachably attached to the inner shaft 422. For example, a disk-shaped protrusion 423 is formed on the inner shaft 422, and the body may have a hook structure 431 that is fastened and disassembled to the protrusion 423.

Referring to FIG. 13, a cutout 534 disposed adjacent to the cooling water path 532 may be formed on an outer circumferential surface of the guide portion 530. The incision part 534 may serve to form a space between the guide hole in which the guide part 530 is inserted and the guide part 530. Accordingly, when the dental drill bit is rotated, the cooling water discharged from the discharge port 528 and passing through the cooling water path 532 may also spread in the space between the guide hole and the guide portion 530 to increase cooling efficiency.

14 is a front view showing a dental drill bit according to another embodiment of the present invention, and FIGS. 15 and 16 are enlarged views of a cooling part of a dental drill bit according to another embodiment of the present invention.

The dental drill bit according to this embodiment is different from the above-described embodiment in that the cooling unit 620 has a cooling water groove 623 having a concave structure. Both the present embodiment and the above-described embodiment have a common feature in which cooling water is contained in the cooling water receiving space of the cooling unit to cool, but in the above-described embodiment, an internal path passing through the cooling unit 20 is formed and cooling water is used as the internal path. Is a structure that passes, and in this embodiment, there is a difference in that it is a structure in which cooling water is contained in the concave cooling water groove 623 of the cooling unit 620 and then released.

The coupling portion 610 and the drill portion 640 of this embodiment may have the same or similar configuration to the above-described embodiment.

The cooling part 620 is disposed between the coupling part 610 and the drill part 640 on the rotating shaft, and a cooling water groove 623 having a concave surface toward the coupling part 610 to form a cooling water receiving space 625 ) Is formed. In the cooling water groove 623, an inlet 626 toward the side of the coupling portion 610 is formed, and when cooling water is poured and supplied from the coupling portion 610, cooling water formed by the cooling water groove 623 through the injection hole 626 is accommodated. Cooling water may be contained in the space 625. In addition, the inner wall of the cooling water groove 623 is formed with an outlet 627 opened toward the drill portion 640, so that the cooling water that has absorbed heat by staying in the cooling water receiving space 625 can be discharged.

When the drill bit rotates, the coolant in the coolant groove 623 moves toward the inner wall by centrifugal force, and a part is discharged through the outlet 627. When a portion of the coolant is discharged to the outlet 627 by centrifugal force, since the new coolant is refilled into the space, a continuous heat dissipation process may be performed after new coolant enters the coolant groove 623 and absorbs heat. have.

14 to 16, the cooling water groove 623 may be formed in a structure having a concave inclined surface when viewed from the coupling portion 610 side. The cooling unit 620 has a body having a larger diameter than the inner shaft 622, and an upper surface facing the coupling unit 610 is concave to form a cooling water groove 623. At this time, the coolant groove 623 may have an inclined surface descending toward the inner shaft 622. The inlet of the coolant groove 623 may be an inlet 626. In addition, an outlet 627 that opens downward may be formed on an inclined surface that is an inner wall of the cooling water groove 623.

At this time, it is formed between the cooling unit 620 and the drill unit 640 and has a larger diameter than the drill unit 640 to have a protruding structure, and the guide unit 630 inserted into the guide hole of the external member is more Can be included. In the guide portion 630, a cooling water path 632 flowing from the cooling water receiving space 625 to the drill portion 640 may be formed.

14 and 15, the cooling unit 620 and the guide unit 630 may be formed in an integral structure. At this time, the cooling water path 632 extends to the cooling water groove 623, and an end portion of the cooling water path 632 that meets the cooling water groove 623 may be an outlet 627. In this embodiment, the cooling water path 632 is formed in a spiral groove structure in the cooling part 620 and the guide part 630.

Referring to FIGS. 17 and 18, the cooling water path 632 ′ may be formed in a straight groove structure directly toward the drill portion 640 from the outlet 627. In addition, a plurality of cooling water paths 632 may be formed in parallel with each other, and the number may be variously set.

As described above, preferred embodiments of the present invention have been described, but those skilled in the art can add, change, delete, or add components without departing from the spirit of the present invention as set forth in the claims. It will be said that the present invention can be variously modified and changed by the like, and this is also included within the scope of the present invention.

Claims

A coupling portion rotatably coupled to the dental device;

A drill portion extending in the direction of the rotation axis of the coupling portion and having a blade for drilling;

A cooling unit disposed between the coupling portion and the drill portion on the rotating shaft, and having a cooling water receiving space having a structure penetrating from an injection hole on the side of the coupling portion to an outlet on the drill portion side; And

A guide portion having a structure formed between the cooling portion and the drill portion and having a larger diameter than the drill portion and having a protruding structure,

Cooling water is injected from the inlet, and after staying in the cooling water receiving space to absorb heat, it is discharged to the outlet,

The cooling portion and the guide portion is formed of an integral body, the outer peripheral surface of the guide portion, the cooling water discharged from the coolant receiving space to flow into the drill portion, a cooling drill path of a concave groove structure is formed dental drill bit.
According to claim 1,

The cooling unit,

An inner shaft connected to the rotating shaft in the coupling portion; And

Spaced apart from the inner shaft, and includes an outer ring surrounding the inner shaft,

A dental drill bit having the cooling water receiving space formed between the inner shaft and the outer ring.
The method of claim 1

The coolant path is a dental drill bit connected to the coolant receiving space.
According to claim 1,

The outlet includes a slot formed along the circumference of the body,

A dental drill bit to which the cooling water path is connected to the slot.
According to claim 1,

The coolant receiving space is an inner space of the body, and the outlet is a dental drill bit formed on an outer peripheral surface of the body.
According to claim 1,

A dental drill bit including a stopper portion protruding in the radial direction than the guide portion and not inserted into the guide hole of the external member to limit the processing depth of the drill portion.
According to claim 1,

The cooling water path formed in the guide portion is a dental drill bit formed to extend continuously to the end of the drill portion.
The method of claim 5,

The outlet, the dental drill bit including a plurality of holes formed spaced apart from each other along the circumference of the body.
According to claim 2,

A dental drill bit having a concave groove structure cooling water inner path formed on an outer circumferential surface of the inner shaft.
The method of claim 8,

The plurality of holes,

Dental drill bit formed to open the coolant receiving space to the side of the body and the side of the drill.
According to claim 1,

On the outer circumferential surface of the guide portion, a dental drill bit having an incision portion disposed adjacent to the cooling water path.
A coupling portion rotatably coupled to the dental device;

A drill portion extending in the direction of the rotation axis of the coupling portion and having a blade for drilling;

A cooling unit disposed between the coupling portion and the drill portion on the rotating shaft and having a cooling water groove having a concave surface facing toward the coupling portion to form a cooling water receiving space; And

A guide portion having a structure formed between the cooling portion and the drill portion and having a larger diameter than the drill portion and having a protruding structure,

The coolant groove includes an inlet toward the coupling portion and an outlet formed on the inner wall and opened toward the drill portion,

Cooling water is injected from the inlet, and after staying in the cooling water receiving space to absorb heat, it is discharged to the outlet,

The cooling portion and the guide portion is formed of an integral body, the outer peripheral surface of the guide portion, the cooling water discharged from the coolant receiving space to flow into the drill portion, a cooling drill path of a concave groove structure is formed dental drill bit.