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WO2009107595A1 - Outil de coupe dentaire - Google Patents

Outil de coupe dentaire Download PDF

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Publication number
WO2009107595A1
WO2009107595A1 PCT/JP2009/053240 JP2009053240W WO2009107595A1 WO 2009107595 A1 WO2009107595 A1 WO 2009107595A1 JP 2009053240 W JP2009053240 W JP 2009053240W WO 2009107595 A1 WO2009107595 A1 WO 2009107595A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting tool
dental cutting
connection surface
shank
blade
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2009/053240
Other languages
English (en)
Japanese (ja)
Inventor
睦紀 塩入
一明 加藤
典夫 金子
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mani Inc
Original Assignee
Mani Inc
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 Mani Inc filed Critical Mani Inc
Priority to JP2010500684A priority Critical patent/JP5382463B2/ja
Publication of WO2009107595A1 publication Critical patent/WO2009107595A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C3/00—Dental tools or instruments
    • A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded

Definitions

  • the present invention relates to a dental cutting tool, and particularly relates to a dental cutting tool in which a blade portion made of cemented carbide, cermet or ceramic and a shank portion formed of a metal such as stainless steel, steel or titanium alloy are connected.
  • Cemented carbides mainly composed of tungsten carbide are widely used as cutting tools for cutting metals and the like because of their toughness and excellent heat resistance. Tungsten carbide is also used as a dental cutting tool. By using such a cemented carbide, it is possible to easily make a hole even with a hard tooth. Further, cermet or ceramic can be used instead of tungsten carbide.
  • cemented carbides such as tungsten carbide, cermets, and ceramics are expensive, and the raw material cost for cutting tools increases when the entire part from the shank to the tip blade is made of cemented carbide. , Manufacturing costs increase. Further, in the case of the solid type, there is a problem that the chuck of the handpiece that holds the cutting tool is worn and easily damaged and easily detached.
  • Patent Document 1 proposes a dental cutting tool as shown in FIG.
  • the dental cutting tool 20 shown in FIG. 5 is used when making a hole in a tooth as a cutting tool.
  • the dental cutting tool 20 has a blade portion 21 having a diameter smaller than that of the shank portion at the tip, a cylindrical shank portion 22 on the other end side, and a tapered portion 23 between the two.
  • the blade portion 21 is connected to the tip end surface 23 a of the tapered portion 23.
  • Only the blade portion 21 is made of cemented carbide, and the taper portion 23 and the shank portion 22 are made of stainless steel and integrated. That is, the stainless steel and the cemented carbide are connected at the tip end surface 23a having the narrowest diameter of the tapered portion 23.
  • the above-mentioned dental cutting tool 20 is used by gripping the shank portion 22 with a chuck of a rotating instrument such as a handpiece and rotating it at a high speed.
  • FIG. 5 is a case where the maximum diameter of the blade portion 21 is smaller than the diameter of the shank portion 22, but the conventional example of FIG. 6 is a case where the diameter of the blade portion is larger than the diameter of the shank portion.
  • the dental cutting tool 30 shown in this figure has a blade portion 31 having a diameter larger than that of the shank portion at the tip, a cylindrical shank portion 32 on the other end side, and a tapered portion 33 provided between the two.
  • the blade portion 31 is connected to the tip surface 33 a of the portion 33.
  • the dental cutting tool shown in FIGS. 5 and 6 has a configuration in which the tip surfaces 23a and 33a in which the diameters of the tapered portions 23 and 33 are the minimum are the connection surfaces of the cemented carbide and the stainless steel. Becomes smaller, connection strength is weak, and it is easy to break during use.
  • the diameter of the blade portion as shown in FIG. 5 is smaller than the diameter of the shank portion, if the blade portion is broken during use, the blade portions 21 and 31 are small, so that they are easily lost and difficult to find and pick up.
  • the side of the blade is often pressed against the treatment site, so unlike the industrial drills, etc., it has a structure that places a burden on the connection surface and is easy to break. was there.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a dental cutting tool that is difficult to break during use and can be easily recovered even when it is broken.
  • a dental cutting tool of the present invention includes a straight columnar shank portion that is gripped by a chuck of a rotary tool, a tapered portion that gradually decreases in diameter from the shank portion, and the tapered portion.
  • a connection surface is provided in the vicinity of a position where the diameter is maximum between an arbitrary position in the taper portion and the tip of the blade portion, and the blade portion.
  • the shank portion side is integrally formed of metal from the connecting surface, and both are connected by the connecting surface. It is said.
  • the metal on the shank part side is made of fiber-like austenitic stainless steel, and the shank part side of the connection part connected at the connection surface is made of an austenite structure that is not fiber-like, or the side of the blade part is used as a treatment site It can be configured to be used by pressing, or the maximum diameter of the blade portion is smaller than the diameter of the shank portion, and the connection surface is provided in the tapered portion, The maximum diameter is larger than the diameter of the shank portion, and the connection surface is provided on the blade portion, or the connection between the metal and the cemented carbide, cermet or ceramic on the connection surface is based on friction welding. It is good.
  • the dental cutting tool of the present invention can be manufactured at a low cost as a whole because the shank portion uses a metal such as stainless steel, steel, titanium alloy, etc., which are less expensive than cemented carbide, cermet, ceramic and the like.
  • the connecting surface is the thickest part from the midway position of the tapered portion to the tip of the blade portion, the connecting area becomes large and it is difficult to break. Even when the side surface of the blade portion is pressed against the treatment site, it is difficult to break and can be used safely.
  • the maximum diameter of the blade part is smaller than the diameter of the shank part, even if it breaks at the connection part during use, the taper part is partly integrated, so it is large, easy to find, and recovered Can be easily done.
  • connection between the metal and the cemented carbide, cermet, or ceramic can be efficiently performed by the configuration by friction welding.
  • the metal By configuring the metal with a fiber-like austenitic stainless steel extending along the longitudinal direction, it is possible to improve rust resistance and bending strength, and to exhibit uniform strength without variation over the entire length. is there.
  • the shank part side of the connection part is made of an austenite structure that is not in the form of fibers, breakage from the joint surface is less likely to occur.
  • FIG. 1 is a diagram of a dental cutting tool according to the present invention, which is the same dental cutting instrument as a conventional example.
  • the dental cutting tool 10 has a thin blade portion 11 at the distal end, a straight cylindrical shank portion 12 on the proximal end side, and a tapered portion 13 having a tapered shape therebetween. Connected with.
  • the tapered portion 13 has the same shape as the conventional example, but is divided into a tapered portion 13 a on the shank portion 12 side and a tapered portion 13 b on the blade portion 11 side in the middle of the tapered portion 13. And both the taper parts 13a and 13b are connected by the connection surface 13c.
  • the tapered portion 13a on the shank portion 12 side is integrally formed with the same metal as the shank portion 12, such as stainless steel, steel, and titanium alloy.
  • the taper portion 13b on the blade portion 11 side is made of cemented carbide, cermet or ceramic and is formed integrally with the blade portion 11.
  • connection surface 13c When the maximum diameter of the blade portion 11 is d, the diameter D of the connection surface 13c has a relationship of D> d. Further, the connection surface 13 c is formed not on the shank portion 12 but on the tapered portion 13.
  • connection surface 13c does not need to be a flat surface, and may have irregularities as long as the shapes complement each other.
  • connection surface 13c must be a smooth surface, but is not limited to a flat surface, and may be a combination of a concave surface and a convex surface as long as the shapes complement each other. Further, it may be connected by brazing.
  • connection may be made at the shank portion 12, but in the present invention, the connection is made at a portion other than the shank portion. The reason for this will be described below.
  • FIG. 2A and 2B are views showing a state where the dental cutting tool connected by the shank portion 12 is held by the chuck of the rotary tool.
  • FIG. 2A is a view showing a state where the dental cutting tool is held by the chuck, and
  • FIG. It is a figure which shows the state broken by.
  • connection surface 12a of the shank portion 12 when the connection surface 12a of the shank portion 12 is connected, the blade portion 11 side from the connection surface 12a is integrally formed of cemented carbide, cermet or ceramic. In this case, since the area of the connection surface 12a is large, the connection force is increased. However, cemented carbide, cermet, or ceramic comes into contact with the tip of the chuck 15, which may damage the tip of the chuck 15.
  • connection surface 12a is broken, the shank portion 12 is inside the chuck 15 as shown in FIG.
  • FIG. 3 is a view showing a state where the taper portion is connected in the case of the present invention, where (a) is a view showing a state of being gripped by a chuck, and (b) is a view showing a state where the connection surface is broken.
  • the chuck 15 does not come into contact with the cemented carbide and is not damaged.
  • the connection surface 13c is broken, the tapered portion 13a, which is the broken tip portion, always protrudes from the chuck 15, as shown in FIG. Therefore, if this taper part 13a is grasped and pulled out, it can be easily taken out.
  • FIG. 4 shows a second embodiment of the dental cutting tool of the present invention.
  • the maximum diameter of the blade part 31 is larger than the diameter of the shank part 32.
  • the connection surface 31 a is formed at the maximum diameter of the blade portion 31.
  • the shank part 32 side from the connection surface 31a is made into an integral structure made of metal, and the blade part 31 side from the connection surface 31a is integrally made of cemented carbide, cermet or ceramic.
  • the connection surface does not necessarily have to be formed at the maximum diameter, and may be a position near the maximum diameter.
  • the shank portion 32 side with a fiber-like austenitic stainless steel extending along the longitudinal direction, the rust resistance and bending strength are improved, and uniform strength without variation over the entire length is exhibited. Is possible.
  • FIG. It is a figure of the dental cutting tool of this invention. It is a figure which shows the state by which the dental cutting tool connected by the shank part was hold
  • FIG. It is the figure connected by the taper part of this invention, (a) is a figure which shows the state hold

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (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)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

L'invention concerne un outil de coupe dentaire qui peut difficilement être brisé pendant son utilisation et qui peut facilement être récupéré lorsqu'il est brisé. Cet outil de coupe dentaire (10) comprend une partie tige en colonne (12) fixée par le mandrin (15) d'un outil rotatif, une partie évasée (13) qui présente un diamètre diminuant progressivement depuis la partie tige, et une partie lame (11) formée au niveau de l'embout de la partie évasée et qui présente un diamètre maximum inférieur au diamètre de la partie tige, une surface de raccordement (13c) étant disposée à une position de la partie évasée au niveau de laquelle le diamètre est plus grand que le diamètre maximum de la partie lame, une partie allant de la partie lame (11) à la surface de raccordement (13c) formant une partie monobloc et constituée de carbure métallique, de cermet ou de céramique, une partie allant de la surface de raccordement (13c) au côté de la partie tige (12) étant constituée d'un métal de type acier inoxydable, acier, alliage de titane, les deux parties étant raccordées au niveau de la surface de raccordement.
PCT/JP2009/053240 2008-02-29 2009-02-24 Outil de coupe dentaire Ceased WO2009107595A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2010500684A JP5382463B2 (ja) 2008-02-29 2009-02-24 歯科用切削具

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-049351 2008-02-29
JP2008049351 2008-02-29

Publications (1)

Publication Number Publication Date
WO2009107595A1 true WO2009107595A1 (fr) 2009-09-03

Family

ID=41015989

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/053240 Ceased WO2009107595A1 (fr) 2008-02-29 2009-02-24 Outil de coupe dentaire

Country Status (2)

Country Link
JP (1) JP5382463B2 (fr)
WO (1) WO2009107595A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012002325A1 (fr) * 2010-06-30 2012-01-05 マニー株式会社 Instrument coupant médical
WO2012014979A1 (fr) * 2010-07-30 2012-02-02 マニー株式会社 Outil de coupe médical
US9358079B2 (en) 2010-02-11 2016-06-07 Sybron Canada Lp Bur and method of making same
JPWO2018092187A1 (ja) * 2016-11-15 2019-10-10 住友電工ハードメタル株式会社 切削工具
WO2020235593A1 (fr) * 2019-05-21 2020-11-26 Ｅｃｏ－Ａ株式会社 Dispositif dentaire et sa méthode de production
JP6892037B1 (ja) * 2020-09-24 2021-06-18 株式会社Ｍｏｌｄｉｎｏ エンドミル

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04224743A (ja) * 1990-12-27 1992-08-14 Matsutani Seisakusho Co Ltd 歯科用バーおよびその製造方法
JPH08206133A (ja) * 1995-02-02 1996-08-13 Manii Kk ピーソーリーマ又はゲーツドリル
JPH0975373A (ja) * 1995-09-13 1997-03-25 Manii Kk カーバイドバー及びその製造方法
WO2007135936A1 (fr) * 2006-05-23 2007-11-29 Nihon University Barre coupante à usage dentaire

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06199580A (ja) * 1992-12-25 1994-07-19 Matsutani Seisakusho Co Ltd 超硬合金とステンレス鋼との接合方法及び超硬合金とステンレス鋼からなる治療器具

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04224743A (ja) * 1990-12-27 1992-08-14 Matsutani Seisakusho Co Ltd 歯科用バーおよびその製造方法
JPH08206133A (ja) * 1995-02-02 1996-08-13 Manii Kk ピーソーリーマ又はゲーツドリル
JPH0975373A (ja) * 1995-09-13 1997-03-25 Manii Kk カーバイドバー及びその製造方法
WO2007135936A1 (fr) * 2006-05-23 2007-11-29 Nihon University Barre coupante à usage dentaire

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9358079B2 (en) 2010-02-11 2016-06-07 Sybron Canada Lp Bur and method of making same
EP2533926A4 (fr) * 2010-02-11 2017-03-22 Sybron Canada LP Fraise et son procédé de fabrication
US20130171583A1 (en) * 2010-06-30 2013-07-04 Mutsunori SHIOIRI Medical cutting instrument
US10350715B2 (en) 2010-06-30 2019-07-16 Mani , Inc. Method of producing a medical cutting instrument
WO2012002325A1 (fr) * 2010-06-30 2012-01-05 マニー株式会社 Instrument coupant médical
JPWO2012002325A1 (ja) * 2010-06-30 2013-08-22 マニー株式会社 医療用切削器具
EP2589353A4 (fr) * 2010-06-30 2015-07-15 Mani Inc Instrument coupant médical
CN103002827A (zh) * 2010-06-30 2013-03-27 马尼株式会社 医疗用切削器具
US20130122461A1 (en) * 2010-07-03 2013-05-16 Mutsunori SHIOIRI Medical cutting tool
US10543059B2 (en) 2010-07-03 2020-01-28 Mani, Inc. Method of producing a medical cutting tool
JP5743164B2 (ja) * 2010-07-30 2015-07-01 マニー株式会社 医療用切削器具
WO2012014979A1 (fr) * 2010-07-30 2012-02-02 マニー株式会社 Outil de coupe médical
JPWO2018092187A1 (ja) * 2016-11-15 2019-10-10 住友電工ハードメタル株式会社 切削工具
WO2020235593A1 (fr) * 2019-05-21 2020-11-26 Ｅｃｏ－Ａ株式会社 Dispositif dentaire et sa méthode de production
CN113853177A (zh) * 2019-05-21 2021-12-28 Ｅｃｏ－Ａ株式会社 牙科医疗用器具及其制造方法
JP6892037B1 (ja) * 2020-09-24 2021-06-18 株式会社Ｍｏｌｄｉｎｏ エンドミル
WO2022064595A1 (fr) * 2020-09-24 2022-03-31 株式会社Moldino Fraise cylindrique deux tailles

Also Published As

Publication number Publication date
JPWO2009107595A1 (ja) 2011-06-30
JP5382463B2 (ja) 2014-01-08

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