JP4341042B1 - Dental cutting tip - Google Patents

Abstract

[PROBLEMS] To solve the problems of conventional carious dentin cutting and removal, to reliably remove carious dentin in a short time, and to preserve healthy tooth pulp and dental pulp as much as possible to increase tooth life. To provide a dental cutting tip that can contribute to the promotion of treatment based on the MI (Minimal Intervention) concept in a dental clinic.
A hand cutting instrument having a grip portion and a dental cutting tip used as a treatment tip vibrated by a vibration device, wherein the dental cutting tip is curved by arranging a plurality of blades. A blade portion having an outer contour formed thereon and a shaft portion coupled to the blade portion, the blade having the blades arranged in different directions and intersecting, and a tip portion of the blade A dental cutting tip characterized in that a plurality of recesses are formed on the entire surface of the blade, and can be cut by moving in various directions with the blade formed on the entire surface of the blade. Can be done.
[Selection] Figure 1

Description

The present invention relates to a dental cutting tip used for dental treatment.

Carious dentin, which is a lesion in carious (dental) dentin, is also called infected or softened dentin, but various efforts have been made to remove carious dentin. .

Conventionally, an excavator is known as a method for removing carious dentin. An excavator is a hand-cutting tool having a flat blade integrally formed with the gripping part at both ends of the gripping part. For carious dentin with a high degree of softening, caries dentist The blade is put deeply into the material, and the carious dentin is removed by peeling off, and the carious dentin having a low softening degree is removed by scraping at the tip of the blade. In addition, there are many types of excavators that have complex shapes and are equipped with variously shaped blades to deal with caries. It is commonly used around the world without change.

Further, conventionally, as a method of removing carious dentin, a cutting bar is attached to a dental air turbine handpiece and a dental microengine handpiece, which are rotating devices, and formed at the tip of the cutting bar. A method of cutting carious dentin by rotating a blade part is known.

A dental tip disclosed in Patent Document 1 is attached to a handpiece of a vibration device such as a dental ultrasonic scaler, and an edge (blade) formed at a tip portion of the dental tip is used to provide a tooth, an alveolar cavity. Used to cut bones. In addition, as a treatment tip used for cutting teeth by attaching to a handpiece of a vibration device such as a dental ultrasonic scaler, an initial caries removal tip V-G70 (Nakanishi Co., Ltd.) is also available. Yes, the caries are removed at the tip of the therapeutic tip coated with diamond.

JP 2006-305227 A

The caries first advances into the tooth by forming a small hole in the enamel on the surface of the tooth, and then expands around the dentin. Furthermore, when it progresses to the pulp inside the tooth, it causes inflammation of the pulp and causes intense pain. Therefore, removal treatment of the dental pulp is necessary, and the life of the tooth is reduced. To prevent this, carious dentin must be surely removed to prevent progression to the dental pulp, but caries has the property of spreading and progressing around in dentine. , A hole having an undercut is likely to occur. However, it takes a lot of effort and time to reliably remove the caries dentin from the undercut, and it is necessary to remove the healthy enamel at the top of the undercut. It often happens.

The above-mentioned excavator used for the purpose of removing carious dentin has a flat blade in a limited direction, and a cutting surface that can be cut only on one side. The direction in which cutting is possible is considerably limited. Therefore, it is difficult to remove carious dentin from carious holes and deep undercuts with complicated shapes, and use multiple excavators with different shaped blades. In many cases, it takes a lot of time and labor to reliably remove the carious dentin.

In addition, the method of cutting the carious dentin by mounting the cutting bar on the dental microengine handpiece is a mounting portion of the cutting bar of the dental microengine handpiece. Because of its large shape, it is unsuitable for narrow parts of the oral cavity such as wisdom teeth. Further, because of the weight of the dental microengine handpiece, fine cutting control in the oral cavity is difficult.

In addition, conventionally, in order to increase the cutting efficiency of carious dentin, after anesthesia injection, a high-speed rotational cutting method for cutting carious dentin by attaching the cutting bar to the dental air turbine handpiece has been performed. However, this high-speed rotary cutting method is difficult to control fine cutting, and because anesthetic injection does not cause patient pain during cutting, not only carious dentin but also healthy dentin is removed by cutting. Easy to do. In addition, cutting under anesthesia injection hinders the body's normal defense response to cutting stimuli, and thus tends to cause inflammation of the pulp inside the teeth.

Further, the dental air turbine handpiece and the dental micro-engine handpiece are equipped with the cutting bar, and the cutting portion of the cutting bar is rotated to cut carious dentin. Because vibration and fever are generated during cutting, it tends to give pain and fear to the patient. In addition, since the shaft portion of the cutting bar that is used by being mounted on such a rotating device is shaken by rotation, the shaft portion that can be used is only a straight shape. Therefore, it is not possible to cut the carious dentin in the deep undercut portion of the carious hole.

The dental tip disclosed in JP-A-2006-305227 does not have a form for efficiently cutting carious dentin. In addition, the initial caries removal tip V-G70 (Nakanishi Co., Ltd.) removes teeth by scraping the teeth with fine diamond particles applied to the tip end surface. Although it is suitable for cutting the quality, when used for dentin softened by caries, fine diamond particles on the chip surface cannot penetrate deeply into the softened carious dentin. Therefore, it is not suitable for use for this purpose.

The object of the present invention is to solve the above-mentioned conventional problems, remove the carious dentin reliably in a short time without causing pain to the patient as much as possible, and achieve a healthy tooth and pulp as much as possible. To preserve the teeth and increase the life of the teeth.

In order to achieve the above object, the present invention provides a dental cutting tip used for removing carious dentin as a hand cutting instrument having a gripping portion and a treatment tip vibrated by a vibration device. The dental cutting tip includes a blade part having an outer contour having a curved surface by arranging a plurality of blades and a shaft part connected to the blade part, and the blade has a direction. A dental cutting tip having the blades that are arranged differently and having a plurality of blade tip recesses and a plurality of auxiliary blades formed at the tip of the blade .

As an example, the dental cutting tip of the present invention is attached to both ends of the gripping part as a hand cutting instrument having a gripping part. Moreover, it can be used as a therapeutic chip for a handpiece of a vibration device such as a dental ultrasonic scaler or a dental air scaler.

The dental cutting tip of the present invention includes a shaft portion and a blade portion, and a plurality of blades are formed on the blade portion, and the blades have the blades arranged in different directions and intersecting.

The blade corresponds to the blade portion of the excavator, and is particularly effective when used for carious dentin having a high degree of softening. The blade is placed deeply in the carious dentin that has been softened. The height of the blade is such that it can be peeled off. The blade is formed with a cutting surface so that cutting can be performed using both surfaces of the blade. In addition, a plurality of concave portions are formed at the tip portion of the blade, and a portion where the concave portion is not formed serves as an auxiliary blade having a function of assisting the cutting of the blade. The blade is softened and easily enters carious dentin.

For example, for the purpose of explanation, among the blades that are arranged in different directions and intersecting, one of the blades is a vertical blade, and the other blade is formed in a direction substantially perpendicular to the vertical blade. When cutting carious dentin using a cutting surface of the vertical blade as a blade, the horizontal blade formed in a direction substantially perpendicular to the vertical blade is difficult to enter the carious dentin. For this reason, the cutting blade is damaged by the horizontal blade, but by providing the auxiliary blade, not only the vertical blade but also the horizontal blade can easily enter carious dentin when the vertical blade is used. It becomes hard to receive the cutting | disconnection obstruction by the said horizontal blade. Further, since the auxiliary blade is a very small blade, it is less susceptible to cutting failure due to the difference in the direction of the blade, so that it can cut in various directions and is relatively hard and has a shallow carious dentin. Suitable for use for cutting.

Therefore, for carious dentin having a high degree of softening of the surface layer among carious dentin, after using the vertical blade and the horizontal blade, it is relatively hard and carious dentinal close to a healthy sound dentin in the deep part. By using the auxiliary blade, the carious dentin can be efficiently removed.

When the dental cutting tip of the present invention is used as a hand cutting tool having a gripping portion, as described above, cutting using a blade that is arranged in different directions and intersecting in various directions can be performed. In addition, since it has a blade portion having an outer contour having a curved surface formed by a plurality of blades, the cutting of the entire outer contour of the blade portion is possible, and the above-described extractor which is a conventional hand cutting tool Compared with the beta, cutting efficiency can be greatly improved.

In particular, when cutting carious dentin close to the dental pulp, fine cutting control is required to prevent injury to the pulp and pain to the patient. Although it is recommended to use the above-mentioned excavator that can cut while feeling by fingers, when the dental cutting tip of the present invention is used as a hand cutting instrument, it has fine cutting control and the above-mentioned excavator. Compared with the beta, cutting efficiency can be greatly improved.

When the dental cutting tip of the present invention is mounted as a treatment tip on the handpiece of a dental ultrasonic scaler that is a vibration device, the ultrasonic vibration energy is transmitted to the blade portion of the dental cutting tip. Since it can be used, the dental cutting tip can be efficiently cut with less finger force than when used as a hand cutting tool. In addition, since a plurality of recesses are formed in the cutting edge portion of the blade of the dental cutting tip, particularly when the water injection function of the ultrasonic scaler is utilized, the flow of water in the cutting edge portion due to water injection is improved. Therefore, heat generated during cutting by ultrasonic energy can be easily cooled, and pain given to the patient can be reduced, and cutting pieces generated during cutting can be easily discharged.

In general, the handpiece of the dental ultrasonic scaler is lighter in weight than the dental air turbine handpiece and the dental microengine handpiece. Since the head part of the handpiece is also compact, it can be easily inserted into a narrow part of the oral cavity, and the dental ultrasonic scaler is a non-rotating device. The dental cutting tip having a bent shaft shape can be used in the same manner as when used as a cutting tool for dental use. For this reason, it is difficult for conventional devices to reach the treatment site of the device, so it is possible to preserve the teeth by cutting and removing carious dentin for extracted wisdom teeth (wisdom teeth), etc. In addition to greatly improving the performance, it is easy to cut by inserting into the deep undercut portion of the carious hole.

This is very important, and in general, the greater the degree of surgical treatment, the more often dental treatment causes problems after treatment and often requires re-treatment. It is known among the people concerned, and the idea of MI (Minimal Intervention) is emphasized as the future way of dental treatment.

The MI (Minimal Intervention) is a minimally necessary surgical intervention. Specifically, it is a treatment that removes the teeth as much as possible, a treatment that removes the pulp inside the teeth as much as possible, and as much as possible. It is an idea to try to perform treatment without cutting teeth.

The cavity initially occurs as a small hole in the enamel on the tooth surface, and when it progresses into the dentin and reaches the dentin, it expands around it, resulting in a cavity in the cavity with an undercut. In order to reliably remove the carious dentin in the deep undercut part, the healthy enamel above the deep undercut part must be cut and removed extensively. There were many things that did not become. However, enamel is a tissue that corresponds to the epithelium of the skin and is an important tissue that protects the tissues inside the teeth. Preserving this enamel as much as possible contributes to increasing the life of the teeth. .

For example, the dental cutting tip of the present invention is attached to the dental ultrasonic scaler handpiece for the treatment of caries having both a deep, carious hole close to the pulp and a deep undercut. Then, when using the method of cutting and removing carious dentin, together with the ultrasonic energy, utilizing the lightweight and compact handpiece of the dental ultrasonic scaler, first, ultrasonic energy, After transmitting the dental cutting tip to the blade and removing the carious dentin on the upper part of the dentin, without transmitting ultrasonic energy to the dental cutting tip, that is, the dental cutting tip Cut carious dentin close to the pulp with fine cutting control so that it does not damage the pulp, as it is used as a manual cutting instrument with a gripping part. Further, using the dental cutting tip of the present invention having a bent shaft configuration, the healthy enamel above the deep undercut portion is preserved as much as possible, and carious dentin is removed by cutting. If possible, make effective use of the undercut after removal of the carious dentin and close the composite resin, which is an adhesive filler, into the hole with the undercut after removal of the carious dentin. It is possible to prevent the composite resin from coming out of the hole having the undercut portion by filling in, so that it is possible to sufficiently expect to prevent retreatment after treatment and increase the life of the teeth.

Furthermore, the dental cutting tip of the present invention can be used by being mounted on a dental air scaler similar to a dental ultrasonic scaler. For this reason, the dental ultrasonic scaler and dental air scaler possessed by most dental clinics can be used as they are simply by purchasing the tip, and the dental cutting tip of the present invention can be reduced by reducing the introduction cost. It is expected that a method of cutting and removing carious dentin by attaching to a dental ultrasonic scaler and a dental air scaler is expected.

As described above, when removing carious dentin, the dental cutting tip of the present invention has a remarkable effect by being used as a treatment tip attached to a vibration device.

As described above, when the dental cutting tip of the present invention is used for cutting and removing carious dentin as a hand cutting instrument having a grip portion and a treatment tip vibrated by a vibration device, cutting efficiency is reduced. Improved the reach of the instrument in the undercut part with deep caries holes and wisdom teeth (wisdom teeth), which was difficult to reach with conventional instruments, so that healthy teeth, pulp and teeth Conserving the teeth and contributing to the extension of the life of the teeth, as well as not requiring high costs that hinder the spread of the treatment, promote treatment based on the MI (Minimal Intervention) concept in the dental clinic Be expected.

It is a perspective view which shows the external appearance of the dental cutting tip of this invention. It is an enlarged view of the blade front-end | tip part of the dental cutting tip. It is a figure which shows the state by which the blade of the dental cutting tip is formed in the waveform. It is a figure which shows the arrangement | positioning structure from which the blade in the blade part of the spherical external outline of the dental cutting tip and the blade part of an elliptical external outline differs. It is a side view which shows the state which mounted | wore the both ends of the holding part with the dental cutting tip which has a respectively different axial part form in order to use the dental cutting tip as a hand cutting instrument. It is a figure which shows the state with which the dental cutting tip was mounted | worn with the handpiece of the dental ultrasonic scaler.

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

FIG. 1 is a perspective view showing the appearance of a practical example of a dental cutting tip according to the present invention, FIG. 2 is an enlarged view of the blade tip of the dental cutting tip, and FIG. The figure which shows the state currently formed in the wave shape, FIG. 4 is a figure which shows the arrangement | positioning structure from which the blade in the said blade part 100 of the spherical external shape outline and the blade part 100 of an elliptical external outline of the dental cutting tip differs. FIG. 5 is a side view showing a state in which the dental cutting tips having different shaft configurations are respectively attached to both ends of the grip portion 300 in order to use the dental cutting tip as a hand cutting tool. 6 is a view showing a state where the dental cutting tip is mounted on a handpiece 400 of a dental ultrasonic scaler.

As shown in FIG. 1, the dental cutting tip of the present invention includes a blade portion 100 formed in a spherical outer contour by a plurality of blades 110 and the shaft portion 200 connected to the blade portion 100, and is made of stainless steel. It is integrally formed of metal such as.

As shown in FIG. 1, the blade portion 100 has a plurality of blades 110 radially from different positions around the connecting portion with the shaft portion 200 in the blade portion 100 as the blade 110 that forms a spherical outer contour. A vertical blade 111 arranged toward the apex of the spherical outer contour, and a horizontal blade 112 arranged at an angle substantially perpendicular to the vertical blade 111 are formed. The vertical blade 111 and the horizontal blade 112 are the same. It intersects at a height to form a spherical outer contour. In addition, the tip portions of the vertical blade 111 and the horizontal blade 112 have a plurality of concave blade tip recesses 140 formed in a concave shape, and the portions where the blade tip recesses 140 are not formed are parts of the vertical blade 111 and the horizontal blade 112. The auxiliary blade 130 has a function of assisting cutting.

Since cutting efficiency is not good only by cutting in one direction with a single flat blade such as a conventional excavator, the dental cutting tip of the present invention moves the blade portion 100 in various directions. A plurality of blades having greatly different directions are arranged so that they can be cut. In the practical example shown in FIG. 1, the vertical blades 111 and the horizontal blades 112 having different directions are arranged so as to intersect at a substantially right angle. Cutting failure occurs between. For example, when the carious dentin is cut by moving the blade side surface of the vertical blade 111 in a direction perpendicular to the blade side surface, the tip of the horizontal blade 112 contacts the carious dentin surface. The tip of 111 becomes difficult to enter the carious dentin, and the cutting ability is clearly reduced. Further, the degree of the cutting failure is larger as hard dentin is used.

In the dental cutting tip of the present invention, in order to improve the cutting trouble, a plurality of concave portions 140 are formed at the tip portions of the vertical blade 111 and the horizontal blade 112, and the blade tip concave portion 140 is not formed. The auxiliary blade 130 has a function of assisting the cutting of the vertical blade 111 and the horizontal blade 112. In particular, the auxiliary blade tip even angle portion which is the even angle portion of the tip of the auxiliary blade 130 shown in FIG. 131 has a cutting function.

For example, in the practical example shown in FIG. 1, when carious dentin is cut by moving the blade side surface 120 of the vertical blade 111 at a right angle to the blade side surface 120, the auxiliary blade tip even angle portion of the lateral blade 112 is cut. 131 enters the carious dentin and cuts the carious dentin, and the auxiliary blade 130 of the vertical blade 111 also enters the carious dentin and cuts the carious dentin. The reduction in the cutting ability of 111 can be improved. Further, compared to the blade 110 not having the auxiliary blade 130, the blade 110 having the auxiliary blade 130 has a small auxiliary blade 130 in contact with the carious dentin surface. Since the auxiliary blade tip angle part 131 can be utilized less, and the cutting ability in the relatively hard carious dentin is high.

As described above, the dental cutting tip of the present invention has a plurality of blade tip recesses 140 formed at the tip of the blade 110 and has the auxiliary blade 130, so that the cutting of the blades 110 having different directions is performed. Since the ability can be effectively used, a more free arrangement configuration of the blade 110 in the blade portion 100 is possible.

Since the dental cutting tip of the present invention has the auxiliary blade 130, a plurality of blades 110 having different directions can be disposed on the entire surface of the blade portion 100 having a curved outer contour, and thus the entire surface of the blade portion 100. It is possible to cut the blade part 100 by moving it in various directions. Therefore, cutting efficiency can be greatly improved as compared with a conventional excavator having only one flat blade.

While the blade side 120 of the longitudinal cutting blade 111 and the transverse blade 112 of the dental cutting tip of the present invention shown in FIG. 1 has a flat shape, FIG. The state where the blade side surfaces 120 of the vertical blade 111 and the horizontal blade 112 of the cutting tip are formed in a wave shape is shown.

The longitudinal blade 111 and the transverse blade 112 having the shape of the flat blade side surface 120 of the dental cutting tip of the present invention shown in FIG. 1 moved the blade portion 100 in a direction perpendicular to the blade side surface 120. The case has the highest cutting ability. On the other hand, when the blade part 100 is moved in the middle direction between the arrangement direction of the vertical blades 111 and the horizontal blades 112, the cutting ability is reduced, but the tip of the vertical blades 111 and the horizontal blades 112 is assisted. Since the blade 130 is provided, the influence on the cutting ability due to the difference in the direction in which the blade portion 100 is moved is reduced.

On the other hand, in FIG. 3, the blade side surfaces 120 of the vertical blade 111 and the horizontal blade 112 of the dental cutting tip of the present invention are waved to further reduce the influence on the cutting ability due to the difference in the direction in which the blade 100 is moved. The state formed in the shape is shown.

Both the vertical blade 111 and the horizontal blade 112 of the dental cutting tip of the present invention shown in FIG. 3 have wave surfaces whose blade side surfaces 120 are alternately curved left and right with respect to the arrangement direction of the vertical blade 111 and the horizontal blade 112. When the blade portion 100 is moved in a direction perpendicular to the blade side surface 120, the shape of the flat blade side surface 120 of the dental cutting tip of the present invention shown in FIG. Although the cutting ability is not as high as that of the vertical blade 111 and the horizontal blade 112, the blade 100 is flat when the blade portion 100 is moved in the middle direction between the vertical blade 111 and the horizontal blade 112. Cutting forces 10 in a variety of different directions can result in a reduction in cutting ability as much as vertical blades 111 and horizontal blades 112 having the shape of the side surface 120. Motion, well-balanced can be enabled.

The blade part 100 of the dental cutting tip of the present invention is characterized in that it is formed in an outer contour having a curved surface. When determining the arrangement configuration of the vertical blade 111 and the horizontal blade 112, specifically, It is necessary to consider whether it is such an outline.

FIG. 4 shows different arrangement configurations of the vertical blades 111 and the horizontal blades 112 in the blade portion 100 having a spherical outer contour and the blade portion 100 having an elliptical outer contour in the dental cutting tip of the present invention. . (A)-(D) are figures which show the comparison of the arrangement structure in the vertical blade 111. FIG. (A) has the blade portion 100 with a spherical outer contour, and (B) has the blade portion 100 with an elliptical outer contour, and (A) and (B) are both of the blade portion 100. The blade part a point 100a which is an arbitrary point, and the blade part b point which is one point of the blade part 100 on a linear extension connecting the blade part a point 100a and the blade part c point 100c which is the center of the blade part 100 This is a case where a plurality of the vertical blades 111 are arranged radially with respect to 100b, and the feature of the arrangement configuration is that all the vertical blades 111 can be arranged in the same length. On the other hand, in (C) and (D), a plurality of vertical blades 111 are arranged in parallel to one vertical blade 111 arranged between the blade part a point 100a and the blade part b point 100b. This is a case where the vertical blades 111 other than the single vertical blade 111 are arranged shorter than the single vertical blade 111.

(E)-(H) are figures which show the comparison of the arrangement | sequence structure in the horizontal blade 112. FIG. (E) and (F) are the blades on a linear extension of a straight line passing through the blade c point 100c at an angle forming a right angle with respect to a straight line connecting the blade a point 100a and the blade c point 100c. This is a case where a plurality of the horizontal blades are arranged radially between the blade portion d point 100d and the blade portion e point 100e, which are two points of the portion 100. The blade portion 100 of (E) is spherical. Since it has an outer contour, all the horizontal blades 112 can be arranged in the same length as in (A), but the blade portion 100 in (F) Like the blade part 100, it has an elliptical outer contour, but since it is different from the arrangement direction of the blade part 100 in (B), the transverse blade 112 that is separated from the center c, The curve becomes strong. Further, in the lateral blades 112 of (G) and (H), the lateral blades 112 that are farther from the center c become shorter.

As described above, in determining the arrangement configuration of the vertical blades 111 and the horizontal blades 112, the form of the blade part 100 must be taken into account, but the purpose of use, the method of use, etc., especially when carious dentin is cut. It is important to consider the direction in which the blade 100 moves. The excavator, which is a conventional hand cutting tool, has a blade direction set for cutting by moving the tip of the gripping part in a direction perpendicular to the longitudinal direction of the gripping part. It is important to consider excavator cutting direction habits. Therefore, even when the dental cutting tip according to the present invention is used as a treatment tip for a hand cutting instrument having a gripping portion, a handpiece of a dental ultrasonic scaler, or the like for cutting carious dentin, It is necessary to place importance on the arrangement of blades for moving and cutting the tip of the gripping part in a direction perpendicular to the longitudinal direction of the handpiece. In consideration of this, the gripping part and the handpiece The arrangement of the vertical blades 111 in FIGS. 4A and 4B, in which the blades can be set long in the longitudinal direction, is suitable for general use.

Further, in carious dentin cutting, the outermost contour of the blade part of the dental cutting tip of the present invention has the widest applicable range, for example, when the caries hole is narrow and deep, In the case of cutting carious dentin, the elongated oval or elongated cylindrical shape is more advantageous.

Thus, the outer contour of the dental cutting tip of the present invention is not limited to a spherical shape, and the feature of the outer contour of the dental cutting tip of the present invention is that it has a curved surface.

FIG. 5 shows a practical form in which the dental cutting tips having different shaft shapes are attached to both ends of the gripping part 300 in order to use the dental cutting tip of the present invention as a hand cutting tool. Has been.

At both ends of the gripping part 300, there are a chip A attaching / detaching part 301 and a chip B attaching / detaching part 302 having a function for detachably connecting and fixing the dental cutting tip, as shown in FIG. The tip A 310 having a straight shaft portion shape is mounted on the chip A attaching / detaching portion 301, and the tip B attaching / detaching portion 302 has a shaft portion shape bent toward the holding portion 300 side. No. 320 is attached. Tip No. 310 is suitable for cutting carious dentin in the axillary area where the undercut is not so strong, and Tip No. 320 is a carious dentin cut in the strong undercut part of the axilla. Suitable for cutting.

FIG. 6 shows a practical form in which the dental cutting tip of the present invention is mounted on a handpiece 400 of a dental ultrasonic scaler, which is a kind of vibration device. A tip holder 410, which is an auxiliary tool for mounting the dental cutting tip of the present invention on the handpiece 400, is detachably mounted on the handpiece 400 of the dental ultrasonic scaler. The cutting tip for use is detachably attached by the tip fixture 420 of the tip holder 410.

100 Blade portion 100a Blade portion a point 100b Blade portion b point 100c Blade portion c point 100d Blade portion d point 100e Blade portion e point 110 Blade 111 Vertical blade 112 Horizontal blade 120 Blade side surface 130 Auxiliary blade 131 Auxiliary blade tip even angle portion 140 Blade tip recess 200 Shaft part 300 Grasping part 301 Chip A attaching / detaching part 302 Chip B attaching / detaching part 310 Chip No. 320 Chip No. 2 400 Handpiece 410 Chip holder 420 Chip fixing tool

Claims (3)

A dental cutting tip used for removing carious dentin as a hand cutting instrument having a gripping part and a treatment tip vibrated by a vibration device, wherein the dental cutting tip comprises a plurality of blades (110) is formed from the blade portion outer contour having a curved surface is formed (100) and the shaft portion connected to the blade portion (100) (200) by arranging said the blade (110), The blades (110) are arranged in different directions and intersecting, and a plurality of blade tip recesses (140) and a plurality of auxiliary blades (130) are formed at the tip of the blade (110) . Dental cutting tip characterized by. The dental cutting tip according to claim 1, wherein the blade (110) is formed in a wave shape. The blade (110) is formed into a flat shape having a height of the blade (110) for softening and removing the blade (110) so as to be pulled deeply into the carious dentin. The dental cutting tip according to claim 1 or 2.