JP3070233U - Dental grinding tool and handpiece using this tool - Google Patents

Abstract

(57) [Abstract] [Problem] A dental grinding tool that can be used for new products and wear replacement, can be used for both mesial and centrifugal use, and can be easily attached to a handpiece. I will provide a. In order to form a cavity in a tooth, the cavity is used by being detachably attached to a handpiece, and the handpiece vibrates a grinding surface of a grinding tool in a direction in which the grinding surface is separated from and brought into contact with the tooth. Or the grinding surface 31 of the grinding tool 5 is vibrated W in the same plane as the grinding surface 31.
The grinding tool 5 is provided with a mounting portion 2 detachably mounted on the handpiece 6 on one side of the rod-shaped body 1, and the other side has a grinding surface 31 corresponding to a cavity to be formed on only one side. Is provided with a grinding unit 3 provided in the above.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a dental grinding tool used detachably attached to a handpiece to form a cavity in a tooth, and a handpiece using the grinding tool.

[0002]

[Prior art]

 One of the dental treatment methods is prosthetic treatment. This is a treatment that removes the carious part of the tooth, forms an appropriate cavity so as to leave healthy parts as much as possible, and implants or covers the cavity with a prosthesis such as an inlay or crown.

In this case, the cavity to be formed needs to be embedded or covered, that is, finished to a predetermined shape in accordance with the standard shape of the fitting surface of the prosthesis to be installed.

FIGS. 4 and 5 show various examples of a cavity C formed in a tooth S. FIG. FIG. 4 (a1) is called a 3/4 coronal cavity, and (a2) is called a pinage cavity. Here, a side view as well as a perspective view is shown. (B1) is a non-slope type, (b2) is a slope type, and (b3) is a concave slope type cavity. The shape of the slope is considered in accordance with the properties of the material to be prosthetic. (C1) is a step type, (c2) is a step bevel type, and (c3) is a chamfer type cavity, which is an example of a convex cavity for covering a so-called crown from outside.

[0005] FIG. 4 (d) shows the name of each part of the cavity, where a is the cavity corner angle (cavity tooth surface corner angle), b is the slope corner angle, c is the tooth surface, and d is the cavity slope. , E are called the side walls, and f is called the fossa base. FIGS. 4 (e1) and 4 (e2) show the relationship between the nature of the material of the prosthesis and the corner angle a of the cavity, and when the material of the prosthesis is brittle in terms of the material, (e1) When a cavity having a porosity angle of a = 135 degrees is formed as shown in (e1), a cavity having a porosity angle of a = 135 degrees is formed as shown in (e1). Good.

FIG. 5 shows perspective views of various cavities, wherein (a) is a class II cavity, (b) is a class III cavity, (c) is a class III cavity, and (d) is a class IV cavity. , (E) are called class V cavities, and (f) are called class VI cavities or Davis cavities.

As described above, there are various types of cavities C. In forming these cavities, in order to properly fit a prosthesis such as an inlay or a crown K without a gap, a porosity angle a and a porosity slope d are provided. , Side walls e and the like must be accurately formed. Also, there is a condition that unnecessary parts must not be cut off.

[0008] There have conventionally been two methods of forming such a cavity, a rotary grinding method and a vibration grinding method. FIG. 6 (a) shows a rotary grinding method, in which an air turbine handpiece or a micromotor handpiece is used to rotate a dental rotary grinding tool 105 such as a diamond bar or a carbide bar to perform the most orthodox grinding. It is a method.

According to this method, although the grinding efficiency is very high, it is not suitable for machining a cavity having a straight portion in the cavity shown in FIG. In addition, since the grinding is performed on the entire outer periphery of the tool due to the rotational grinding, there is a high possibility that the adjacent tooth S that does not need to be ground is also ground as shown by the white arrow in this figure. .

On the other hand, in the vibration grinding method, a dental grinding tool as shown in FIGS. 6 (b1) to 6 (b6) has been proposed. The dental grinding tool 205 is detachably mounted on a drive unit (not shown) of a handpiece such as an ultrasonic scaler or an air scaler (hereinafter, referred to as a “scaler”), and has a direction as indicated by an arrow in FIG. Then, a back-and-forth vibration having a very small amplitude (for example, 100 μm (micron)) and a large frequency (for example, 27 Hz (Hertz)) is performed.

The dental grinding tool 205 includes a grinding surface 205a in which diamond abrasives, carbide abrasives and the like are fixed according to the shape of the cavity, a back surface 205b formed on the opposite side by a smooth surface, and the grinding surface 205a. And an arm 205c extending and supporting a grinding portion composed of a back surface 205b and a position easy to grind in the oral cavity, and a connecting portion 205d for connecting the arm portion 205c and a driving portion of the handpiece, The connecting portion 205d is detachably connected to and attached to a female screw portion (not shown) of a driving portion of the handpiece by a male screw portion 205e formed at an end thereof.

According to such a dental grinding tool, since a cavity is formed in accordance with the shape of the grinding surface 205a, stable adaptability to the prosthesis can be ensured, and a linear shape can be formed. Yes, it was possible to provide an edge at the corner. Except for the portion that needs to be ground, it is formed on the smooth back surface 205b, so that adjacent teeth were not shaved.

[0013]

[Problems to be solved by the invention]

 However, in the above-mentioned conventional dental grinding tool 205, since it is necessary to prepare the entire tool including the arm portion 205c and the connecting portion connecting portion 205d for each cavity shape, the tool alone becomes expensive, and this requires a cavity. Providing a large number according to the type of the equipment was extremely costly. In addition, it was necessary to replace the entire tool, despite the fact that only the grinding part needed to be replaced.

Further, as shown in FIG. 6, for the same cavity shape, it was necessary to prepare two types of (b1) to (b3) for mesial use and (b4) to (b6) for centrifugal use. . Further, since the screw means is used to attach the dental grinding tool 205 to the handpiece, it takes time to attach.

[0015] The present invention has been made in view of such circumstances, and in the case of a new one or in the case of wear replacement, the cost can be reduced, and it can be shared for mesial and centrifugal use. The purpose is to provide a dental grinding tool that can be easily attached to a base, and a handpiece using this tool.

[Means for Solving the Problems]

 Claims 1 to 5 propose a dental grinding tool, and claim 6 proposes a handpiece using the grinding tool.

[0016] The dental grinding tool according to claim 1 is used by being detachably attached to a handpiece for forming a cavity in a tooth, and the handpiece is used to attach a grinding surface of the grinding tool to the tooth. The grinding tool vibrates in the direction in which the grinding tool moves away from or separates from the handpiece, or the grinding surface of the grinding tool vibrates in the same plane as the grinding surface. It is characterized in that it has a mounting portion that can be mounted so as to be able to be mounted, and a grinding portion that has a grinding surface provided on only one side corresponding to a cavity to be formed on the other side.

In other words, in the conventional dental grinding tool, the entire part to be attached to and detached from the handpiece was conventionally regarded as a single tool. However, the grinding tool itself is a rod-like body having a necessary and simple structure. It is characterized in that it is to be replaced when it is worn, and that the other arms and connecting parts are to be replaced on the handpiece side and are not to be replaced. Therefore, the cost of the grinding tool to be replaced can be reduced, and the cost can be reduced.

In addition, the rod-shaped body refers to a cylindrical body in principle, and the mounting portion refers to the end of the rod-shaped body or a part which has been subjected to minimum processing. The mounting portion of the grinding tool such as described above can be rotated with respect to the mounting portion of the handpiece, and when viewed from the handpiece side, the ground surface can be directed toward or away from the user. In other words, this grinding tool can be used for both mesial and centrifugal purposes simply by changing the direction of attachment to the handpiece, and cost reduction can be achieved.

Further, the grinding is performed by vibrating the grinding surface in the sliding direction or the separating direction, and since this grinding surface is provided only on one surface, it is also possible to grind an unnecessary portion on the back surface. Absent.

A dental grinding tool according to a second aspect is characterized in that, in the first aspect, the rod-shaped body is bent for a purpose of grinding.

In this grinding tool, a portion connecting the mounting portion of the rod-shaped body and the grinding portion is appropriately bent, so that the grinding portion of the grinding tool is positioned closer to the object to be ground from the handpiece side. It can be positioned and is suitable for grinding the inner part of the oral cavity.

According to a third aspect of the present invention, in the dental grinding tool according to any one of the first and second aspects, the grinding portion is provided at a predetermined position of the rod-shaped body corresponding to a grinding purpose. And

This grinding tool has a higher degree of freedom in the position of the grinding portion, and can cope with more frequent grinding targets.

A dental grinding tool according to a fourth aspect of the present invention is the dental grinding tool according to any one of the first to third aspects, wherein the mounting surface of the rod-shaped body is configured so that the ground surface can perform desired grinding by the vibration. A mark for attaching to the handpiece is formed, and a mark corresponding to the mark is formed on the handpiece.

As described above, the grinding tool of the present invention can be rotated at the mounting portion of the handpiece. Therefore, in this grinding tool, the vibration given from the handpiece is marked for rotational alignment so that it is suitable for grinding on the grinding surface of the grinding tool, and the marking corresponding to the handpiece side is also provided. It was done. Therefore, the intended grinding can be achieved without any problem.

It is preferable that the marks correspond to both the mesial and centrifugal use described above.

According to a fifth aspect of the present invention, there is provided a dental grinding tool according to any one of the first to fourth aspects, wherein the mounting portion of the grinding tool is removably mounted on a handpiece for root canal treatment. It is characterized by.

[0028] Vibration drive is also used in a handpiece for root canal treatment. However, this grinding tool has a mounting portion which is detachable in place of a file normally attached to such a handpiece for root canal treatment. Since it can be attached to the tractor, it can be conveniently used as a handpiece for root canal treatment, and can also be ground for cavity formation.

A handpiece according to claim 6 is used for forming a cavity in a tooth, and the dental grinding tool according to any one of claims 1 to 5 is detachably attached to the dental tool. Characterized in that the grinding surface is vibrated in a direction in which the ground surface is separated from and brought into contact with the tooth, or the grinding surface of the grinding tool is vibrated in the same plane as the ground surface.

[0030]

[Embodiment of the invention]

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 illustrates an example of a dental grinding tool and a handpiece according to the present invention. FIG. 1 (a) is an external perspective view showing a place where both are set, and (b1) and (b2) are dental tools. FIG. 4 is a detailed perspective view of a mounting portion between the grinding tool and the handpiece, and (c1) to (c3) are diagrams illustrating examples of a dental grinding tool.

A dental grinding tool 5 shown in FIG. 1 has a cylindrical rod-shaped body 1, a mounting part 2 that uses one end of the rod-shaped body 1 simply as a mounting part to a handpiece 6, and It comprises a grinding portion 3 provided on the opposite side of the rod 1 and a mark 4 provided on the mounting portion 2 of the rod 1.

The grinding part 3 of the grinding tool 5 is a part using the rod-like body 1 as it is, or a plate-like body, and has diamond abrasive grains or carbide abrasive grains adhered to one surface thereof. It comprises a ground surface 31 and a back surface 32 which is the opposite surface and is a smooth surface. The mark 4 described above is a mark for enabling the intended grinding of the grinding surface 31 by the vibration of the handpiece 6 when the grinding tool 5 is attached to the handpiece 6. 1 (c1) to (c3), this mark 4 is visible only on one side of the mounting portion 2, but may be provided on the other side for both centrifugal and mesial use. .

The handpiece 6 may be a scaler, a micromotor handpiece, an air turbine handpiece, an air motor handpiece, or one using electromagnetic drive means as a drive source. 1 (a), a swinging vibration such as W1, a vertical vibration such as W2, a horizontal vibration such as W3, a longitudinal vibration such as W4, or any combination thereof. Make it vibrate. Actually, the vibrations W1 to W4 shown in this figure are not purely the vibrations, but include any other vibration elements even when any of the vibrations is performed. .

The amplitude of the vibrations W1 to W4 is very small, and the frequency is very large. For example, the amplitude of a scaler is about 30 to 100 μ (micron), and the frequency is 27 KHz (kilohertz). ).

This vibration is transmitted to the dental grinding tool 5 attached to the tip of the mounting arm 61, and the grinding surface 31 of the dental grinding tool 5 is slid or separated with respect to a grinding target, that is, a tooth. By vibrating the teeth, a cavity having a predetermined shape, that is, a shape along the shape of the grinding portion 31 is formed on the tooth.

The mounting arm 61 shown in FIG. 1 (b 1) is of a type called a so-called end chip of a scaler for transmitting vibration of a built-in ultrasonic vibrator or the like. A mounting hole 61a that fits without any gap is formed in the orthogonal direction, and a mark 61b corresponding to the mark 4 of the grinding tool 5 is provided facing the hole edge. The reason why the two marks 61b are provided in this way is to enable the grinding tool 5 to be used for both mesial and centrifugal purposes with respect to the handpiece 6.

The mounting arm 61 is provided with a set screw (not shown) for fixing and holding the mounting portion 2 of the grinding tool 5 inserted into the mounting hole 61a, and a simple setting means. The grinding tool 5 can be easily fixed.

The mounting arm 62 shown in FIG. 1 (b 2) has a mounting hole 62 a formed in the axial direction so as to fit the mounting part 2 of the grinding tool 5 without a gap, as compared with the mounting arm 61. , 62b are provided correspondingly. The mounting arm 62 is of a so-called scaler end tip type that vibrates the grinding tool back and forth, that is, in the direction of W4 shown in FIG.

Since the grinding tool 5 has a simple structure, it is inexpensive, and when the grinding surface 31 is worn out and replaced, the cost can be reduced. Further, as described above, depending on the direction of attachment to the handpiece 6, it can be used for both mesial and centrifugal purposes, which also reduces costs.

Further, as shown in (c1), (c2), and (c3), the mounting position of the grinding portion 3 on the rod-shaped body 1 can be various, and it is possible to correspond to various grinding objects. Can be.

Further, the shape of the grinding unit 3 may be provided with an appropriate gradient with respect to the vibration surface. For example, when a part of the rod-shaped body 1 of (b1) or (b2) is used as the grinding portion 3 as it is, the grinding portion 3 is formed to have a tapered or tapered gradient. Is also good. In this case, when the grinding tool 5 is vibrated in the axial direction, the grinding efficiency can be increased.

Here, the grinding unit 3 is integrated with the rod-shaped body 1, but these may be separately provided and the grinding unit 3 may be exchangeably attached to the rod-shaped body 1.

FIG. 2 is an external perspective view showing other various examples of the dental grinding tool of the present invention.

In the grinding tool 5 shown in FIGS. 2 (a 1) to (a 4), the grinding surface 31 of the grinding section 3 has various shapes. This is in accordance with the shape of the cavity to be formed. However, even when various shapes are prepared, since the grinding tool 5 itself has a simple structure, the grinding tool 5 can be manufactured at low cost, and as a whole, Significant cost reduction can be achieved.

FIGS. 2 (b 1) to 2 (b 4) are characterized by the shape of the mounting portion 2. This is an ISO standard compatible with the standard (ISO) contra head, and any standard contra head can be attached.

If the attachment portion 2 can be detachably attached to the handpiece for root canal treatment instead of a file normally attached to the handpiece, the handpiece for root canal treatment will also be provided. Since a vibration drive is used, the vibration can be used to perform grinding for cavity formation. In other words, the handpiece for root canal treatment can also be used for cavity preparation, which is convenient.

FIGS. 2 (c 1) and 2 (c 2) show portions of the rod-shaped body 1 other than the mounting portion 2 and the grinding portion 3, which are bent in accordance with the object to be ground.

In this way, the grinding unit 3 can be brought to a deeper, more distant position, and it is possible to cope with the grinding of the innermost part of the oral cavity.

FIG. 3 shows another example of the mounting arm.

The mounting arm 61 shown in FIGS. 3 (a1) and 3 (a2) is of a contra-head type. In this case, the dental cutting tool 5 is held while pressing the attaching / detaching button 61c of the mounting arm 61. When the pressing on the detachable button 61 is released after the fitting, the cutting tool 5 is fixed. The vibration direction of the cutting tool 5 is the direction of the arrow in FIG.

The attachment arm 62 shown in FIGS. 3 (b 1) to 3 (b 3) is of a scaler type. In this case, after the dental cutting tool 5 is inserted, another fastening aid 62 c is used. The cutting tool 5 is fixed by rotating a tightening ring (not shown) at the tip of the mounting arm 62. In this case, the vibration direction of the cutting tool 5 is the direction of the arrow in FIG.

In any case, the dental cutting tool 5 can be easily attached to the handpiece 6.

[0054]

[Effect of the invention]

 According to the dental grinding tool according to the first aspect, the grinding tool itself is a bar-shaped body having a necessary and simple structure, which is to be replaced at the time of wear. Since the connecting part and the like are not to be replaced because they are on the handpiece side, the grinding tool to be replaced can be made inexpensive and cost can be reduced.

Also, this grinding tool can be used for both mesial and centrifugal purposes by simply changing the direction of attachment to the handpiece, and cost reduction can be achieved. Furthermore, grinding is performed by vibrating the grinding surface in the sliding direction or the separating direction, and since this grinding surface is provided only on one surface, there is no need to grind unnecessary parts on the back surface.

According to the dental grinding tool of the second aspect, in addition to the effect of the first aspect, the portion connecting the mounting portion of the rod-shaped body and the grinding portion is appropriately bent, so that the handpiece can be bent from the side. The grinding portion of the grinding tool can be located at a position closer to the object to be ground, and can be used for grinding a deep part of the oral cavity.

According to the dental grinding tool of the third aspect, in addition to the effect of the first or second aspect, the degree of freedom of the position of the grinding portion is high, and the apparatus can cope with more frequent grinding objects. Can be done.

According to the dental grinding tool of the fourth aspect, in addition to the effect of any one of the first to third aspects, the vibration given from the handpiece is suitable for grinding on the grinding surface of the grinding tool. Since the marks for alignment are provided, the intended grinding can be achieved without any problem.

According to the dental grinding tool of the fifth aspect, the mounting portion can be removably mounted instead of a file normally mounted on a handpiece for root canal treatment using vibration. As a result, the handpiece for root canal treatment can be ground for cavity preparation, which is convenient.

A handpiece according to claim 6 is used for forming a cavity in a tooth, and is adapted to removably mount the dental grinding tool according to any one of claims 1 to 5. Therefore, the effects of these dental grinding tools can be exhibited.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an example of a dental grinding tool and a handpiece of the present invention, wherein (a) is an external perspective view showing a place where both are set, and (b1) and (b2) are dental grinding tools. Detailed perspective view of the attachment part of the handpiece, (c1)
(C3) shows an example of a dental grinding tool.

FIG. 2 is an external perspective view showing other various examples of the dental grinding tool of the present invention.

FIG. 3 is a diagram showing another example of the mounting arm unit.

FIG. 4 is an illustration of various types of cavities formed in a tooth.

FIG. 5 is an external perspective view of various types of cavities formed in a tooth.

FIG. 6 is a diagram showing an example of a conventional dental grinding tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rod-shaped body 2 Mounting part 3 Grinding part 31 Grinding surface 32 Back 4 Mark 5 Dental grinding tool 6 Handpiece C cavity S Teeth

Claims (6)

[Utility model registration claims] 1. A dental grinding tool used detachably attached to a handpiece for forming a cavity in a tooth, wherein the handpiece separates and contacts a ground surface of the grinding tool to the tooth. The grinding tool vibrates in the direction, or the grinding surface of the grinding tool is vibrated in the same plane as the grinding surface. The grinding tool is detachably attached to one of the rod-like bodies to the handpiece. A dental grinding tool, comprising: a grinding portion provided on one side only and a grinding surface corresponding to a cavity to be formed on the other side. 2. The dental grinding tool according to claim 1, wherein the rod is bent for a purpose of grinding. 3. A dental grinding tool according to claim 1, wherein said grinding portion is provided at a predetermined position on said rod-shaped body for a purpose of grinding. 4. The rod according to claim 1, wherein a mark for attaching to the handpiece is formed on the attaching portion of the rod-shaped body so that the ground surface can be subjected to desired grinding by the vibration. And a mark corresponding thereto is formed on the handpiece. 5. The dental grinding tool according to claim 1, wherein the mounting portion of the grinding tool is detachably mounted on a handpiece for treating a root canal. 6. A handpiece used for forming a cavity in a tooth, wherein the dental grinding tool according to claim 1 is removably mounted, and the ground surface of the grinding tool is a tooth. Vibrating in a direction away from or approaching, or
A handpiece characterized in that a grinding surface of the grinding tool is vibrated in the same plane as the grinding surface.