WO2024058080A1 - Lime pour traitement de canal - Google Patents

Lime pour traitement de canal Download PDF

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Publication number
WO2024058080A1
WO2024058080A1 PCT/JP2023/032927 JP2023032927W WO2024058080A1 WO 2024058080 A1 WO2024058080 A1 WO 2024058080A1 JP 2023032927 W JP2023032927 W JP 2023032927W WO 2024058080 A1 WO2024058080 A1 WO 2024058080A1
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WO
WIPO (PCT)
Prior art keywords
root canal
file
canal treatment
cutting edge
needle
Prior art date
Application number
PCT/JP2023/032927
Other languages
English (en)
Japanese (ja)
Inventor
計芳 鈴木
Original Assignee
計芳 鈴木
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 計芳 鈴木 filed Critical 計芳 鈴木
Publication of WO2024058080A1 publication Critical patent/WO2024058080A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C5/00—Filling or capping teeth
    • A61C5/40—Implements for surgical treatment of the roots or nerves of the teeth; Nerve needles; Methods or instruments for medication of the roots
    • A61C5/42—Files for root canals; Handgrips or guiding means therefor

Definitions

  • the present invention relates to files for root canal treatment such as H files.
  • the dentist scrapes the wall of the root of a patient's decayed tooth, removes the pus clogged at the tip of the tooth root and/or the filling material that remains from treatment, and removes the nerve.
  • Instruments such as reamers and/or files are used in performing the treatment.
  • a reamer is used for enlarging and/or cleaning root canals by twisting reaming.
  • the so-called H file is an instrument that grinds and cleans the root canal wall by reciprocating the file in the vertical direction. In between these is a so-called K file, which allows both reaming and filing operations.
  • gutta-percha When gutta-percha is removed with a dissolving agent, it tends to remain in the root canal and may interfere with subsequent treatment, so generally gutta-percha is removed with a file.
  • the cutting edge When the metal needle of the H file is reciprocated in the vertical direction, the cutting edge functions as a scraping blade and grinds the root canal wall. When the shavings enter the groove, the cutting function of the cutting edge is prevented from being inhibited by the shavings.
  • an object of the present invention is to provide a root canal treatment file that can improve the efficiency of root canal treatment.
  • the root canal treatment file of the present invention is Equipped with a metal needle with a spirally extending cutting edge and a flute, At least a portion of the needle portion other than the cutting edge has an uneven structure.
  • the needle portion A spirally extending cutting edge functions as a scraping blade to grind the root canal wall.
  • the root canal wall is ground due to the uneven structure of at least a portion of the file excluding the cutting edge. That is, even when the file is moved downward, the root canal can be enlarged and/or cleaned, improving treatment efficiency. Since the shavings at this time are allowed to escape into the flute of the needle portion, the deterioration of the grinding function of the root canal wall due to the cutting edge and the uneven structure is avoided by the shavings.
  • At least a portion of the surface of the needle portion other than the cutting edge and the defined surface of the flute has an uneven structure.
  • the cutting edge extends in a spiral along the upper edge of each of the convex curved surface on the front side that extends in a spiral manner of the needle part and the concave curved surface on the back side as a defining surface of the flute, It is preferable that at least a portion of the convex curved surface has the uneven structure.
  • the uneven structure is constituted by at least one of file marks, sandblasting marks, and an abrasive grain layer made of abrasive grains and an adhesive.
  • the cutting edge is constituted by an edge of a land that has a constant width in the circumferential direction of the needle and extends spirally along a conical side surface or a cylindrical side along the outer shape of the needle; Preferably, the cutting edge is formed at an obtuse angle in the cross section.
  • the land which has a constant width in the circumferential direction of the needle portion and whose edge constitutes the cutting edge, comes into contact with the root canal wall. Further, the cutting edge is formed at an obtuse angle in the cross section of the needle portion. Therefore, it is possible to avoid a situation in which the cutting edge digs into the root canal wall during reaming with the file, preventing rotation of the file or damaging the cutting edge.
  • the needle portion is provided with alternating contact points.
  • a part of the spirally extending cutting edge that is one pitch away from a part that contacts the root canal wall (contact part) is a part that does not contact the root canal wall (non-contact part).
  • the area is designed so that the area that is further shifted by one pitch from the non-contact area becomes the contact area.
  • FIG. 2 is an explanatory diagram of a file configuration according to an embodiment of the present invention.
  • FIG. 2 is an enlarged explanatory diagram of a needle portion of a file as an embodiment of the present invention.
  • FIG. 4 is a cross-sectional view of a file as another embodiment of the present invention.
  • FIG. 6 is an explanatory diagram of a file configuration according to another embodiment of the present invention.
  • the needle portion 12 extends parallel to the needle portion 12 .
  • the needle portion 12 is formed, for example, by twisting an elongated metal plate so that the taper angle is within the range of 30° to 60° or 40° to 50°.
  • the metal plate for example, a plate made of a nickel titanium (Ni-Ti) alloy is employed.
  • Ni-Ti alloys have various crystal structures such as austenitic, R-phase or martensitic phases.
  • the Ni—Ti alloy may contain or be doped with Co, Cu, or the like.
  • the needle portion 12 has a cutting edge 120, a land 121, and a flute 122 that extend in a spiral manner.
  • the land 121 is a convex curved surface (a curved surface extending spirally along a substantially conical side surface or a substantially cylindrical side surface) that becomes the front side when the metal plate is twisted.
  • the flute 122 or groove portion is a portion defined by a concave curved surface (a curved surface extending spirally along a substantially conical side surface or a substantially cylindrical side surface) that becomes the back side when the metal plate is twisted.
  • a portion of the needle portion 12 excluding the cutting edge 120 and the flute 122 (a portion between the cutting edge 120 and the flute 122), that is, at least a portion of the land 121 has an uneven structure.
  • the uneven structure is composed of at least one of file marks S1, sandblasting marks S2, and abrasive layer S3.
  • file marks S1 may be formed in a region corresponding to at least a part of the land 121 of the needle part 12 in a metal plate that is a raw material of the needle part 12 by laser processing.
  • the spacing between the rasps is adjusted to fall within a range of 5 to 500 ⁇ m, for example.
  • the rasp eyes may be single eyes, compound eyes, wavy eyes, onime eyes, or a combination thereof.
  • the needle portion 12 in which the file marks S1 as an uneven structure are formed on at least a portion of the land 121 is manufactured.
  • file marks S1 may be formed in a region corresponding to at least a portion of the land 121 of the needle portion 12. Areas other than the areas where the file marks S1 are formed on the metal plate may be masked in advance.
  • sandblasting marks S2 may be formed in a region corresponding to at least a part of the land 121 of the metal plate.
  • abrasive grains such as silicon carbide, aluminum oxide, diamond and/or cubic boron nitride (CBN) with an average grain size of 5 to 100 ⁇ m are used, for example.
  • CBN cubic boron nitride
  • a file 1 having a needle portion 12 in which a sandblasting trace S2 as an uneven structure is formed on at least a portion of the land 121 is produced.
  • sandblasting marks S2 may be formed in a region corresponding to at least a part of the land 121 of the needle part 12. Areas other than the area where the sandblasting marks S2 are formed on the metal plate may be masked.
  • etching marks or roughening marks may be formed in at least a portion of the land 121 as an uneven structure by etching using oxalic acid or the like.
  • an abrasive grain layer S3 made of the abrasive grains and the adhesive is formed. good.
  • the abrasive grains for example, silicon carbide, aluminum oxide, diamond, and/or cubic boron nitride (CBN) having an average grain size of 5 to 100 ⁇ m are used.
  • the abrasive grain layer S3 may be formed entirely on the surface of the needle portion 12.
  • FIG. 3 shows a cross-sectional view of the needle portion 12 of the file 1 as another embodiment.
  • the edge of the land 124 of the needle portion 12 constitutes a cutting edge 120.
  • the land 124 has a constant width in the circumferential direction of the needle portion 12 and extends in a spiral shape along a substantially conical side surface or a substantially cylindrical side surface along the outer shape of the needle portion 12.
  • the cutting edge 120 is formed not at an acute angle but at an obtuse angle (for example, within the range of 100° to 135°) in the cross section of the needle portion 12.
  • a carbon nano film layer S4 is formed on the concave curved surface defining the flute 122.
  • the land 124 which has a constant width in the circumferential direction of the needle portion 12 and whose edge constitutes the cutting edge 120, comes into contact with the root canal wall. Furthermore, the cutting edge 120 is formed at an obtuse angle in the cross section of the needle portion 12. Therefore, it is possible to avoid a situation in which the cutting edge 120 digs into the root canal wall during reaming with the file 1, preventing rotation of the file 1 or damaging the cutting edge 120.
  • the cutting edge 120 extending spirally in the needle portion 12 functions as a scraping blade to grind the root canal wall. Further, when the file 1 is moved downward, the root canal wall is ground by the carbon nano film layer S4, which is the uneven structure of at least a portion of the land 121 of the needle part 12.
  • the needle portion 12 has an alternating contact point.
  • a part of the cutting edge 120 extending in a spiral shape that is shifted by one pitch from a part that contacts the root canal wall (contact part CP) becomes a part that does not contact the root canal wall (non-contact part), and is separated from the non-contact part.
  • the contact portion CP is designed so that the portion shifted by one pitch further becomes the contact portion CP.
  • the contact point is removed before the cutting edge 120 bites into the root canal wall at the contact area CP.
  • Site CP is released from contact pressure. Therefore, it is possible to avoid a situation in which the cutting edge 120 digs into the root canal wall during reaming with the file 1, preventing rotation of the file or damaging the cutting edge 120.
  • the present invention is applicable not only to H files but also to various root canal treatment files such as reamers, K files, and RT files.
  • the cutting edge 120 when the file 1 is moved upward, the cutting edge 120 not only functions as a scraping blade to grind the root canal wall, but also when the file 1 is moved downward. Also, the root canal wall is ground by the uneven structure S1 formed on the land 121 and the like. This improves the efficiency of root canal treatment and reduces the burden on dentists and patients, so the industrial value of the present invention is extremely high.
  • the present invention is also applicable to the veterinary field.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
  • Neurosurgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Surgery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

L'invention concerne une lime pour traitement de canal permettant d'améliorer l'efficacité de traitement de canal. Lorsqu'une lime (1) est déplacée vers le haut selon le mouvement alternatif vertical (limage), un bord tranchant (120) s'étendant en spirale dans une unité d'aiguille (12) fonctionne comme une lame de raclage pour meuler la paroi du canal radiculaire. En outre, lorsque la lime (1) est déplacée vers le bas, la paroi du canal radiculaire est meulée au moyen d'une structure irrégulière (S1, S2 et/ou S3) d'au moins une partie de surface (121) de l'unité d'aiguille (12).
PCT/JP2023/032927 2022-09-13 2023-09-08 Lime pour traitement de canal WO2024058080A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022159810A JP2024041014A (ja) 2022-09-13 2022-09-13 根管治療用のファイル
JP2022-159810 2022-09-13

Publications (1)

Publication Number Publication Date
WO2024058080A1 true WO2024058080A1 (fr) 2024-03-21

Family

ID=90274930

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/032927 WO2024058080A1 (fr) 2022-09-13 2023-09-08 Lime pour traitement de canal

Country Status (2)

Country Link
JP (1) JP2024041014A (fr)
WO (1) WO2024058080A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6365414U (fr) * 1986-10-20 1988-04-30
JP2002526156A (ja) * 1998-10-06 2002-08-20 タルサ デンタル プロダクツ インコーポレーテッド トルク低減歯内治療ファイル
JP2021061993A (ja) * 2019-10-11 2021-04-22 マニー株式会社 歯科用ファイル

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6365414U (fr) * 1986-10-20 1988-04-30
JP2002526156A (ja) * 1998-10-06 2002-08-20 タルサ デンタル プロダクツ インコーポレーテッド トルク低減歯内治療ファイル
JP2021061993A (ja) * 2019-10-11 2021-04-22 マニー株式会社 歯科用ファイル

Also Published As

Publication number Publication date
JP2024041014A (ja) 2024-03-26

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