Dental root canal treatment appliance

Abstract

The present invention relates to a dental root canal treatment tool comprising: an insertion part which extends in the longitudinal direction, is provided with a cutting edge, and is inserted into a root canal; and a seatbelt part which is provided on one side of the insertion part, has a wider width than the insertion part, and is not provided with a cutting edge, in which the seatbelt part is in contact with an inner side wall of the root canal without cutting the root canal.

Description

Technical Field

[0001] The present invention relates to a dental root canal treatment instrument, and more particularly to a dental root canal treatment instrument, wherein a safety belt portion is provided on one side of an insertion portion provided with a cutting edge, thereby limiting the insertion depth of the insertion portion into the root canal and preventing the insertion portion from entering too deeply. Background Art

[0002] Root canal therapy is a type of dental treatment known as nerve therapy. Figure 1 A tooth 10 can be divided into a crown 11 and a root 12. The crown 11 is the upper portion of the tooth 10, protruding from the gums. The root 12 is located below the crown 11 and is inserted into the gums, connecting to the alveolar bone.

[0003] See also Figure 1 The root canal 20 is a small cavity formed within the tooth root 12. If bacteria invade the root canal 20 and cause disease, pain may result. Root canal therapy is a treatment method for lesions within the root canal 20. Root canal therapy involves mechanically cleaning, disinfecting, shaping, and ultimately sealing the root canal 20.

[0004] As a treatment tool for root canal treatment, a file is used that can mechanically clean and shape the inside of the root canal 20. A file is a rod-shaped treatment tool that extends in the longitudinal direction.

[0005] Recently, files can be installed on electric tools for use. With the popularization of electric files, they play an important role in improving cutting efficiency. However, such files have the following problems.

[0006] When cutting the inside of the root canal 20 with a file, it is difficult to adjust the penetration depth of the file into the root canal 20. When the file enters the root canal 20, if the penetration depth of the file is deeper or shallower than the length of the root canal 20, it may cause a serious problem leading to treatment failure.

[0007] The existing file does not have a separate device for adjusting the depth of the file entering the root canal 20, so that its operation depends on the skill of the dentist. Summary of the Invention

[0008] Technical issues

[0009] The present invention aims to solve the above-mentioned problems, and more specifically relates to a dental root canal treatment instrument, which has a safety belt portion provided on one side of an insertion portion provided with a cutting edge, thereby limiting the insertion depth of the insertion portion into the root canal and preventing the insertion portion from entering too deep.

[0010] Technical Solution

[0011] In order to solve the above problems, the present invention provides a dental root canal treatment instrument, which is a treatment instrument for entering the interior of a root canal and treating the root canal, and is characterized in that it includes: an insertion portion, which extends in the length direction, is provided with a cutting edge and is inserted into the interior of the root canal; and a safety belt portion, which is arranged on one side of the insertion portion, has a width wider than the insertion portion and is not provided with a cutting edge, wherein the safety belt portion contacts the inner wall of the root canal without cutting the root canal.

[0012] In order to solve the above problems, the cross section of the insertion portion of the dental root canal treatment instrument of the present invention may be polygonal, and the cross section of the safety belt portion may be circular.

[0013] In order to solve the above-mentioned problem, the insertion portion and the safety belt portion of the dental root canal treatment instrument of the present invention can be made integrally.

[0014] In order to solve the above-mentioned problem, the safety belt portion of the dental root canal treatment instrument of the present invention is slidable relative to the insertion portion.

[0015] In order to solve the above-mentioned problem, the insertion portion and the safety belt portion of the dental root canal treatment instrument of the present invention can be made of the same material and manufactured as one piece.

[0016] In order to solve the above problems, the insertion portion of the dental root canal treatment instrument of the present invention gradually narrows from one end to the other end, the safety belt portion has a width wider than the width of one end of the insertion portion, and the outer side of the safety belt portion can be formed with a tapered slope.

[0017] In order to solve the above problem, the dental root canal treatment instrument of the present invention may further include a buffer portion connecting the insertion portion and the safety belt portion, wherein the buffer portion may have a cross-sectional portion extending in a flat surface shape.

[0018] In order to solve the above problems, the insertion portion, the safety belt portion and the buffer portion of the dental root canal treatment instrument of the present invention are made integrally, and the insertion portion, the safety belt portion and the buffer portion can be made by laser processing.

[0019] In order to solve the above problems, the dental root canal treatment instrument of the present invention may further include: an extension portion, which is provided on one side of the safety belt portion and extends along the length direction; and a coupling portion, which is connected to the extension portion and coupled to the electric instrument.

[0020] Beneficial effects

[0021] The present invention relates to a dental root canal treatment instrument, which has the advantage that a safety belt portion is provided on one side of an insertion portion provided with a cutting edge, thereby limiting the insertion depth of the insertion portion into the root canal.

[0022] The present invention has the advantage that the safety belt portion limits the insertion depth of the insertion portion, thereby preventing the insertion portion from entering the root canal deeper than intended by the operator.

[0023] The present invention has the advantage that the safety belt portion prevents the insertion portion from entering the root canal deeper than expected by the operator, thereby preventing treatment failure, thereby improving the efficiency of root canal treatment and increasing the success rate of root canal treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A diagram of a tooth consisting of a crown and root.

[0025] Figure 2 is a perspective view of a dental root canal treatment instrument according to an embodiment of the present invention.

[0026] Figure 3 FIG. 4 is a side view of a dental root canal treatment instrument according to an embodiment of the present invention.

[0027] Figure 4 is a cross-sectional view of an insertion portion according to an embodiment of the present invention.

[0028] Figure 5 Schematic diagram of an insertion portion, a buffer portion, and a safety belt portion of a dental root canal treatment instrument according to an embodiment of the present invention.

[0029] Figures 6 to 8 It is a schematic diagram showing a process of mechanically removing a lesion inside a root canal by using a dental root canal treatment instrument according to an embodiment of the present invention.

[0030] Figure 9 FIG1 is a schematic diagram showing that a seat belt portion can slide relative to an insertion portion according to another embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to clarify the scope of the present invention and enable those skilled in the art to implement the present invention, this specification describes the principles of the present invention and discloses embodiments thereof. The disclosed embodiments may be implemented in various forms.

[0032] Expressions such as "including" or "may include" that may be used in various embodiments of the present invention refer to the existence of the corresponding functions, actions, or components, etc. disclosed, and do not limit the additional one or more functions, actions, or components, etc. In addition, it should be understood that in various embodiments of the present invention, terms such as "including" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and do not preclude the possibility of the existence or addition of one or more other features or numbers, steps, actions, components, parts, or combinations thereof.

[0033] When a component is referred to as being “connected or coupled” to another component, it should be understood that the component may be directly connected or coupled to the other component, but it may also be understood that there may be a new component between the component and the other component. On the other hand, when a component is referred to as being “directly connected” or “directly coupled” to another component, it should be understood that there may not be a new component between the component and the other component.

[0034] As used herein, the terms "first," "second," etc. may be used to describe various components, but the components should not be limited by the terms. These terms are only used to distinguish one component from another.

[0035] The present invention relates to a dental root canal treatment instrument, and more particularly to a dental root canal treatment instrument, wherein a safety belt portion is provided on one side of an insertion portion provided with a cutting edge, thereby limiting the insertion depth of the insertion portion into the root canal and preventing the insertion portion from entering too deeply.

[0036] The dental root canal treatment instrument according to an embodiment of the present invention may be a file inserted into the root canal 20. Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0037] See also Figure 2 and Figure 3 The dental root canal treatment instrument according to an embodiment of the present invention includes an inserting portion 110 and a safety belt portion 120 .

[0038] See also Figure 2 The insertion portion 110 extends in the longitudinal direction, is provided with a cutting edge 113 and is inserted into the root canal 20. The insertion portion 110 may be in the shape of a rod, and the cutting edge 113 may be provided on the outside of the insertion portion 110 in the shape of a rod.

[0039] The insertion portion 110 can be rotated by an electric tool. When the insertion portion 110 is inserted into the root canal 20 and rotated by the electric tool, the lesion inside the root canal 20 can be mechanically removed by the cutting edge 113 of the insertion portion 110 .

[0040] According to an embodiment of the present invention, the cutting edge 113 of the inserting portion 110 may extend in a spiral shape and be provided on the rod-shaped inserting portion 110 , and the cross section of the inserting portion 110 may be polygonal.

[0041] See also Figure 4 and Figure 5 According to an embodiment of the present invention, the cutting edge 113 may be formed by the vertex of the inserting portion 110 having a triangular cross section. Figure 4 This is a diagram showing a cross section of the insertion portion 110 when viewed from one end 111 of the insertion portion 110 toward the other end of the insertion portion 110 .

[0042] When the triangular cross-section of the inserting portion 110 rotates along the length direction of the inserting portion 110 , the apex of the triangle rotates, and the cutting edge 113 may extend in a spiral shape along the length direction of the inserting portion 110 .

[0043] More specifically, when the central angle of the triangular cross section of the inserting portion 110 changes along the length of the inserting portion 110 , the apex of the triangle rotates and the cutting edge 113 may extend in a spiral shape along the length of the inserting portion 110 .

[0044] At this time, the cross-sectional area of the triangular insertion portion 110 may decrease from one end 111 of the insertion portion 110 toward the other end 112 of the insertion portion 110 .

[0045] Among them, the central angle of the cross-section of the triangular insertion portion 110 can be the angle formed between the line connecting one vertex of the triangle to the center of the triangle and the vertical line. When the insertion portion 110 extends along the length direction, it can extend as the central angle of the cross-section of the triangular insertion portion 110 changes.

[0046] However, the cross-section of the insert portion 110 according to an embodiment of the present invention is not limited to a triangle and may be a polygonal shape such as a quadrilateral or pentagon. The cutting edge 113 may be formed by the vertices of the insert portion 110 having a polygonal cross-section. When the polygonal cross-section of the insert portion 110 is rotated along the length of the insert portion 110, the vertices of the polygon rotate, and the cutting edge 113 may extend in a spiral shape along the length of the insert portion 110.

[0047] More specifically, when the central angle of the polygonal cross section of the inserting portion 110 varies along the length of the inserting portion 110 , the apex of the polygon rotates and the cutting edge 113 may extend in a spiral shape along the length of the inserting portion 110 .

[0048] At this time, the cross-sectional area of the polygonal insertion portion 110 may decrease from one end 111 of the insertion portion 110 toward the other end 112 of the insertion portion 110 .

[0049] Among them, the central angle of the cross-section of the polygonal insertion part 110 can be the angle formed between the line connecting one vertex of the polygon to the center of the polygon and the vertical line. When the insertion part 110 extends along the length direction, it can extend as the central angle of the cross-section of the polygonal insertion part 110 changes.

[0050] The safety belt portion 120 is disposed on one side of the insertion portion 110, has a width wider than the insertion portion 110, and is not provided with a cutting edge 113. According to an embodiment of the present invention, the safety belt portion 120 is connected to the insertion portion 110, has a circular cross-section, and may not be provided with a cutting edge 113.

[0051] The safety belt portion 120 may have a width greater than the maximum width of the insertion portion 110. Specifically, the cross-sectional area of the polygonal insertion portion 110 may decrease from one end 111 of the insertion portion 110 toward the other end 112 of the insertion portion 110. The insertion portion 110 has a maximum width at the one end 111 of the insertion portion 110. The safety belt portion 120 may have a circular shape and a width greater than the maximum width of the insertion portion 110.

[0052] When the safety belt portion 120 is inserted into the root canal 20, the safety belt portion 120 can contact the inner wall of the root canal 20 without cutting the inner wall of the root canal 20. When the safety belt portion 120 contacts the inner wall of the root canal 20, the safety belt portion 120 is stuck on the root canal 20, restricting the insertion portion 110 connected to the safety belt portion 120 from entering.

[0053] According to an embodiment of the present invention, the insertion portion 110 gradually narrows from one end 111 to the other end 112 , the safety belt portion 120 has a width wider than the width of one end 111 of the insertion portion 110 , and a tapered slope 123 may be formed on the outer side of the safety belt portion 120 .

[0054] As described above, the cross-sectional area of the polygonal insertion portion 110 may decrease from one end 111 of the insertion portion 110 to the other end 112 of the insertion portion 110 , so that the insertion portion 110 may become narrower from the one end 111 to the other end 112 .

[0055] The safety belt portion 120 may have a width greater than that of the end 111 of the insertion portion 110 , and the tapered slope 123 may be formed on an outer side of the safety belt portion 120 .

[0056] Specifically, the cross-section of the safety belt portion 120 may be circular, and the cross-sectional area of one side 121 of the safety belt portion 120 may be larger than the cross-sectional area of the other side 122 of the safety belt portion 120 .

[0057] See also Figure 5 The cross-section of the seat belt portion 120 is circular, and the cross-sectional area gradually increases from the other side 122 of the seat belt portion 120 to the one side 121 , so that a tapered inclined surface 123 can be formed on the outer side of the seat belt portion 120 .

[0058] As described above, the safety belt portion 120 does not have the cutting edge 113 and can come into contact with the inner wall of the root canal 20 and be stuck on the inner wall of the root canal 20. When the safety belt portion 120 is stuck on the inner wall of the root canal 20, in order to prevent the safety belt portion 120 from applying a mechanical force to the inner wall of the root canal 20, the outer side of the safety belt portion 120 can be formed with a tapered inclined surface 123.

[0059] More specifically, see Figure 6 The cross-sectional area of the root canal 20 may gradually decrease in the direction toward the alveolar bone. In view of the shape of the root canal 20 with a cross-sectional area gradually decreasing in the direction toward the alveolar bone, a tapered slope 123 may be formed on the outside of the safety belt portion 120 .

[0060] According to an embodiment of the present invention, the inserting portion 110 and the safety belt portion 120 can be made in one piece. In addition, the inserting portion 110 and the safety belt portion 120 can be made of the same material and made in one piece.

[0061] The inserting portion 110 and the safety belt portion 120 may be made of stainless steel, but the present invention is not limited thereto. The inserting portion 110 and the safety belt portion 120 may also be made of Ni-Ti alloy.

[0062] In addition, the inserting portion 110 and the seat belt portion 120 may be made of different materials. The inserting portion 110 may be made of stainless steel, and the seat belt portion 120 may be made of Ni-Ti alloy.

[0063] According to the embodiment of the present invention, the inserting portion 110 and the safety belt portion 120 can be manufactured by laser processing. The inserting portion 110 and the safety belt portion 120 can also be manufactured integrally by laser processing.

[0064] The dental root canal treatment instrument according to the embodiment of the present invention may further include a buffer portion 130 . The buffer portion 130 connects the inserting portion 110 and the safety belt portion 120 .

[0065] The buffer portion 130 may be disposed between one end 111 of the insertion portion 110 and the other side 122 of the safety belt portion 120 . The insertion portion 110 and the safety belt portion 120 may be connected via the buffer portion 130 .

[0066] The buffer portion 130 may include a cross-sectional portion 131 extending in a flat surface shape. The cross-sectional portion 131 is formed outside the buffer portion 130 . The cross-sectional portion 131 may extend in a flat surface shape and be formed outside the buffer portion 130 .

[0067] As described above, the insertion portion 110 has a polygonal cross section, and the safety belt portion 120 may have a circular cross section. The cross-sectional portion 131 of the buffer portion 130 is provided to smoothly connect the polygonal insertion portion 110 and the circular safety belt portion 120 .

[0068] Specifically, the cross-sectional portion 131 may extend from a side of a polygon formed at one end of the inserting portion 110 , and the buffer portion 130 may have the same number of cross-sectional portions 131 as the number of sides of the polygon.

[0069] See also Figure 5 According to an embodiment of the present invention, the cross-sectional portion 131 may extend in a flat surface shape from three sides of a triangle formed by one end 111 of the insertion portion 110 to the other side 122 of the safety belt portion 120 having a circular cross-section.

[0070] In addition, the cross-sectional portion 131 according to an embodiment of the present invention may extend in a flat surface shape from the polygonal side formed by the one end 111 of the inserting portion 110 to the other side 122 of the belt portion 120 formed with a circular cross-section.

[0071] If the cross section of the insert portion 110 is polygonal and the cross section of the safety belt portion 120 is circular, a sharp point may be generated at the connection between the insert portion 110 and the safety belt portion 120. Specifically, if the cross section changes directly from polygonal to circular, sharp corners may be formed at the endpoints of the circular cross section.

[0072] The cross-sectional portion 131 of the buffer portion 130 is provided to prevent this situation. The cross-sectional portion 131 of the buffer portion 130 can smoothly connect the insertion portion 110 having a polygonal cross-sectional shape and the safety belt portion 120 having a circular cross-sectional shape.

[0073] According to an embodiment of the present invention, the inserting portion 110, the safety belt portion 120, and the buffer portion 130 can be made of one piece. In addition, according to an embodiment of the present invention, the inserting portion 110, the safety belt portion 120, and the buffer portion 130 can be made of the same material, or, as needed, can be made of different materials.

[0074] According to an embodiment of the present invention, the inserting portion 110, the safety belt portion 120, and the buffer portion 130 can be made by laser processing, but the present invention is not limited thereto and the inserting portion 110, the safety belt portion 120, and the buffer portion 130 can also be made by various methods.

[0075] See also Figure 2 and Figure 3 The dental root canal treatment instrument according to the embodiment of the present invention may further include an extending portion 140 and a coupling portion 150 .

[0076] The dental endodontic device according to the embodiment of the present invention can be a file connected to an electric device. When the dental endodontic device according to the embodiment of the present invention is connected to the electric device, the insertion portion 110 is rotated by the electric device, and the lesion inside the root canal 20 is mechanically removed.

[0077] The coupling portion 150 is a portion coupled to the electric device. When the dental root canal treatment device according to an embodiment of the present invention is coupled to the electric device via the coupling portion 150, the insertion portion 110 can be rotated by receiving power from the electric device.

[0078] The extending portion 140 may connect the connecting portion 150 and the safety belt portion 120. The extending portion 140 is disposed on one side of the safety belt portion 120 and may extend along a length direction.

[0079] The extension portion 140 may be rod-shaped and extend in the longitudinal direction, and may have a width smaller than that of the safety belt portion 120. The coupling portion 150 may be connected to the extension portion 140, and the electric device may be coupled to the coupling portion 150 connected to the extension portion 140.

[0080] Figures 6 to 8 1 and 2 are diagrams showing a process of mechanically removing a lesion inside a root canal 20 and disinfecting the root canal 20 using a dental endodontic instrument according to an embodiment of the present invention.

[0081] See also Figure 6 In order to mechanically remove the lesion inside the root canal 20, the insertion part 110 enters the inside of the root canal 20. At this time, the insertion part 110 is rotated by the electric instrument and enters the inside of the root canal 20.

[0082] See also Figure 7 When the insertion portion 110 is inserted into the root canal 20 and rotated by an electric device, the lesion inside the root canal 20 can be mechanically removed by the cutting edge 113 of the insertion portion 110 .

[0083] During root canal treatment, if the insertion portion 110 is inserted deeper than the depth of the root canal, the root canal treatment may fail. In the past, there was no device specifically for adjusting the length of root canal files, so the operation of root canal treatment instruments relied solely on the dentist's skill.

[0084] However, the dental root canal treatment instrument according to an embodiment of the present invention limits the entry of the insertion part 110 by providing the safety belt part 120 on one side of the insertion part 110, thereby preventing the insertion part 110 from entering the root canal 20 deeper than the dentist expects and causing treatment failure.

[0085] Specifically, see Figure 8 The safety belt portion 120 can contact the inner wall of the root canal 20 without cutting the inner wall of the root canal 20. When the insertion portion 110 is inserted, if the safety belt portion 120 contacts the inner wall of the root canal 20, the safety belt portion 120 is stuck on the root canal 20, thereby limiting the insertion of the insertion portion 110 connected to the safety belt portion 120.

[0086] In order to prevent the safety belt portion 120 from exerting mechanical force on the inner wall of the root canal 20 when the safety belt portion 120 is stuck on the inner wall of the root canal 20 , a tapered inclined surface 123 may be formed on the outer side of the safety belt portion 120 .

[0087] In this way, the safety belt portion 120 contacts the inner wall of the root canal 20 and limits the entry of the insertion portion 110 , thereby preventing the insertion portion 110 from entering deeper into the root canal 20 than the dentist intends.

[0088] According to another embodiment of the present invention, the seat belt portion 120 is slidably movable relative to the insertion portion 110. The seat belt portion 120 is detachably coupled to the insertion portion 110 and is slidably movable relative to the insertion portion 110.

[0089] See also Figure 9 The safety belt portion 120 can slide along the insertion portion 110 according to the depth of the insertion portion 110 inserted into the root canal 20. If the insertion portion 110 is inserted into the root canal 20 to a shallow depth, the safety belt portion 120 can slide along the insertion portion 110 toward the other end 112 of the insertion portion 110.

[0090] In addition, if the insertion portion 110 is inserted deeper into the root canal 20 , the safety belt portion 120 may slide along the insertion portion 110 toward the end 111 of the insertion portion 110 .

[0091] The seat belt portion 120 is not limited to sliding along the insertion portion 110 , and the seat belt portion 120 may also slide along the extension portion 140 provided at one side of the seat belt portion 120 .

[0092] According to an embodiment of the present invention, the buffer portion 130 may also slide relative to the insertion portion 110 together with the safety belt portion 120. According to an embodiment of the present invention, the safety belt portion 120 and the buffer portion 130 may be integrally formed and slide relative to the insertion portion 110, or the safety belt portion 120 and the buffer portion 130 may be separately formed and slide relative to the insertion portion 110.

[0093] In order to enable the seat belt portion 120 and the buffer portion 130 according to the embodiment of the present invention to slide relative to the insertion portion 110 , the seat belt portion 120 and the buffer portion 130 may have various structures.

[0094] For example, the safety belt portion 120 and the buffer portion 130 may have a hollow portion embedded in the insertion portion 110, and the insertion portion 110 may have an interference fit with the hollow portion. The safety belt portion 120 and the buffer portion 130 may slide relative to the insertion portion 110 through the hollow portion.

[0095] However, the method of sliding the belt portion 120 and the buffer portion 130 relative to the insertion portion 110 is not limited thereto, and various methods may be applied through various structures.

[0096] The dental root canal treatment instrument according to the embodiment of the present invention described above has the following effects.

[0097] An advantage of the dental endodontic instrument according to an embodiment of the present invention is that a safety belt portion is provided on one side of the insertion portion having the cutting edge, thereby limiting the insertion depth of the insertion portion into the root canal.

[0098] An advantage of the dental root canal treatment instrument according to an embodiment of the present invention is that the safety belt portion limits the insertion depth of the insertion portion, thereby preventing the insertion portion from entering the root canal deeper than intended by the operator.

[0099] The advantage of the dental root canal treatment instrument according to one embodiment of the present invention is that the safety belt portion prevents the insertion portion from entering the root canal deeper than the operator expects and causing treatment failure, thereby improving the efficiency of root canal treatment and increasing the success rate of root canal treatment.

[0100] Thus, although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is for illustrative purposes only, and persons skilled in the art will appreciate that various modifications and variations of the embodiments are possible. Therefore, the true technical scope of the present invention should be determined by the technical concepts of the appended claims.

Claims

1. A treatment instrument for entering a root canal and treating the root canal, characterized in that: include: an insertion portion extending in a length direction, provided with a cutting edge and inserted into the root canal; as well as a safety belt portion provided on one side of the insertion portion, having a width wider than that of the insertion portion and not provided with a cutting edge, The safety belt portion contacts the inner wall of the root canal without cutting the root canal.

2. The treatment instrument for entering and treating a root canal according to claim 1, wherein: The cross section of the inserting portion is polygonal, The cross section of the safety belt portion is circular.

3. The treatment instrument for entering and treating a root canal according to claim 1, wherein: The inserting portion is integrally formed with the seat belt portion.

4. The treatment instrument for entering and treating a root canal according to claim 1, wherein: The inserting portion and the safety belt portion are made of the same material and are integrally manufactured.

5. The treatment instrument for entering and treating a root canal according to claim 1, wherein: The seat belt portion is slidably movable relative to the insertion portion.

6. The treatment instrument for entering and treating a root canal according to claim 1, characterized in that: The insertion portion gradually narrows from one end to the other end. The seat belt portion has a width wider than a width of one end of the insertion portion, A tapered slope is formed on the outer side of the seat belt portion.

7. The treatment instrument for entering and treating a root canal according to claim 2, characterized in that: Also includes: a buffer portion connected between the insertion portion and the seat belt portion, The buffer portion has a cross-sectional portion extending in a flat surface shape.

8. The treatment instrument for entering a root canal and treating the root canal according to claim 7, characterized in that: The inserting portion, the safety belt portion and the buffer portion are made in one piece. The inserting portion, the seat belt portion, and the buffer portion are manufactured by laser processing.

9. The treatment instrument for entering a root canal and treating the root canal according to claim 1, characterized in that: Also includes: an extension portion, which is provided on one side of the safety belt portion and extends along the length direction; as well as The coupling portion is connected to the extension portion and coupled to the electric appliance.

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