WO2023032337A1 - Dental piece, method for manufacturing same, and dental handpiece - Google Patents

Dental piece, method for manufacturing same, and dental handpiece Download PDF

Info

Publication number
WO2023032337A1
WO2023032337A1 PCT/JP2022/016281 JP2022016281W WO2023032337A1 WO 2023032337 A1 WO2023032337 A1 WO 2023032337A1 JP 2022016281 W JP2022016281 W JP 2022016281W WO 2023032337 A1 WO2023032337 A1 WO 2023032337A1
Authority
WO
WIPO (PCT)
Prior art keywords
needle
dental
tubular member
dental piece
diameter
Prior art date
Application number
PCT/JP2022/016281
Other languages
French (fr)
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 WO2023032337A1 publication Critical patent/WO2023032337A1/en

Links

Images

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 a dental piece such as a file and/or a reamer attached to the tip and a dental handpiece for driving the same for treating the root canal of a tooth.
  • a dental piece for root canal treatment such as scraping the wall of the root of a patient's decayed tooth, removing a pus block and/or filling material stuck at the tip of the root, and/or removing the nerve.
  • files and/or reamers are used.
  • gutta-percha root canal filling material
  • the present invention provides a dental piece such as a file capable of suppressing excessive bending of the tip of the needle and increasing the contact force of the side of the needle with respect to the root canal wall, and a method for manufacturing the same.
  • an object of the present invention is to provide a dental handpiece in which the dental piece is used.
  • the present invention a needle base; a needle portion extending from one end portion of the needle base body and formed so as to gradually decrease in diameter from the proximal end portion to the distal end portion;
  • a dental piece comprising:
  • the tip of the needle has a diameter of 0.30 mm or more, and the inclination angle of the outer contour with respect to the central axis of the needle falls within the range of arctan 0.018 to arctan 0.022.
  • the method for manufacturing the dental piece of the present invention comprises By twisting a long metal plate, the diameter of the tip is the diameter of the tip of the needle portion, and the inclination angle of the outer contour with respect to the central axis is in the range of arctan 0.018 to arctan 0.022. creating a needle portion intermediate comprising; forming the needle by cutting the distal end of the needle intermediate.
  • the dental piece It is preferable to include a step of applying a surface smoothing treatment to at least the tip portion of the needle portion.
  • the dental handpiece of the present invention is a first tubular member; a second tubular member having a side wall formed with a communication hole communicating with the internal space of the first tubular member and connected to one end of the first tubular member at the side wall; a dental piece configured as described above; a vibrating cylinder that supports the needle base with the needle portion of the dental piece projecting into an external space, and that is coaxially inserted through the second cylindrical member; a rotary member arranged in the internal space of the first tubular member such that one end faces the internal space of the second tubular member through the communication hole; an actuator that rotates the rotating member about a central axis, one end of the rotating member is provided with a cam protrusion projecting at a position eccentric with respect to the central axis of the rotating member; A cam concave portion into which the cam convex portion is fitted is formed on the outside of the side wall of the vibrating cylinder.
  • FIG. 1 is an explanatory diagram of the configuration of a dental handpiece as a first embodiment of the present invention
  • FIG. 1 is an explanatory diagram of the configuration of a dental piece as one embodiment of the present invention
  • FIG. 3 is an explanatory diagram relating to a method for manufacturing the dental piece of FIG. 2
  • FIG. 4 is a configuration explanatory diagram of a dental handpiece as a second embodiment of the present invention
  • a dental handpiece 10 as a first embodiment of the present invention schematically shown in FIG. 1 is configured to drive a file 40 (or reamer) as a dental piece.
  • the dental handpiece 10 includes a first tubular member 11 , a second tubular member 12 (supporting tube), and a vibrating tube 20 .
  • the first tubular member 11 is formed in a substantially cylindrical shape.
  • the second cylindrical member 12 is formed in a substantially cylindrical shape, and the central axis of the second cylindrical member 12 is included in the central axis of the first cylindrical member 11 at a certain angle (for example, within an angle range of 90° to 120°).
  • a vibrating cylinder 20 is connected to the distal end portion of the first cylindrical member 11 at its side wall in such a posture as to form or cross the first cylindrical member 11 .
  • the vibrating cylinder 20 is positioned substantially coaxially with the second cylindrical member 12 and in a direction parallel to the central axis of the second cylindrical member 12 (FIGS. 1 and 2). vertical direction) is inserted so as to be able to vibrate.
  • the first cylindrical member 11, the second cylindrical member 12 and the vibration cylinder 20 are made of metal such as aluminum alloy and stainless steel.
  • the first tubular member 11 and the second tubular member 12 are integrally made of the same metal.
  • the vibrating cylinder 20 may be made of the same metal as the first tubular member 11 and the second tubular member 12, or may be made of a different metal.
  • a substantially cylindrical rotary member 110 is arranged with its center axis parallel or substantially parallel to the longitudinal direction of the first tubular member 11 . It is placed in an extended position.
  • the tip of the rotating member 110 is formed in a substantially cylindrical shape with a relatively large diameter.
  • the distal end portion is provided with a cam pin 111 that is eccentric with respect to the central axis of the rotary member 110 and protrudes in a direction parallel to the central axis.
  • a pin mounting hole extending parallel to the central axis may be formed in the distal end portion of the rotating member 110, and the cam pin 111 may be detachably mounted in the pin mounting hole.
  • the rotating member 110 is configured to be connected to the rotating shaft of the electric motor of the chair unit and driven to rotate about the central axis.
  • a switch for ON/OFF-controlling the operation of the electric motor is, for example, a foot switch (not shown).
  • the inner space of the first tubular member 11 and the inner space of the second tubular member 12 communicate with each other through a communication hole 121 formed in the side wall of the second tubular member 12. ing. As shown in FIG. 1, on the inner side of the side wall of the second tubular member 12, at a different azimuth position (for example, opposite side) from the communication hole 121 with respect to the central axis of the second tubular member 12. , a recessed guide groove 122 extending parallel to the central axis is formed.
  • a cam hole 21 (cam concave portion) that is locally recessed in the radial direction is formed on the outer side wall of the vibrating cylinder 20 .
  • a guide pin 22 is provided on the outside of the side wall of the vibrating cylinder 20 and protrudes radially from a different azimuth position (for example, the opposite side) from the cam hole 21 with respect to the center axis.
  • a cam pin 111 of a rotating member 110 is fitted into the cam hole 21 of the vibrating cylinder 20 .
  • the cam hole 21 is formed wider than the cam pin 111 in the circumferential direction (and axial direction if necessary) of the vibrating cylinder 20 so that there is play between the cam pin 111 and the cam hole 21. .
  • the guide pin 22 of the vibrating cylinder 20 is fitted into the guide groove 122 of the second tubular member 12 .
  • the guide groove 122 guides the guide pin 22 and the guide groove 122 in the circumferential direction so that there is play (which may be smaller than the play between the cam pin 111 and the cam hole 21) in the circumferential direction of the vibrating barrel 20. It is formed wider than the pin 22 .
  • the inner space of the vibrating barrel 20 communicates with the external space through a mounting opening 201 on one end side, and communicates with the external space through a through hole 202 having a smaller diameter than the mounting opening 201 on the other end side. are doing.
  • One end of the internal space of the vibration cylinder 20 is closed by attaching the cover member 24 to the mounting opening 201 .
  • the lid member 24 is composed of a substantially disk-shaped head portion 241 and a substantially cylindrical mounting portion 242 protruding from one end of the head portion 241 .
  • a female thread is formed on the inner side wall of the mounting opening 201 of the vibrating cylinder 20
  • a male thread is formed on the side surface of the mounting portion 242 of the cover member 24 to be screwed into the female thread.
  • the female thread of the vibrating cylinder 20 and/or the male thread of the lid member 24 may be omitted, and the mounting portion 242 of the lid member 24 may be fitted to the vibrating cylinder 20 by being pressed against the inner side wall of the vibrating cylinder 20 .
  • the lid member 24 is made of metal such as aluminum alloy or stainless steel.
  • file 40 comprises needle base 41 and needle portion 42 .
  • the needle part 42 is fixed to the needle base body 41 so as to protrude in the axial direction from one end side of the substantially cylindrical needle base body 41 .
  • the needle portion 42 is formed so as to gradually decrease in diameter from the proximal portion to the distal portion.
  • the file 40 is attached to the vibrating barrel 20 with the needle base 41 housed in the inner space of the vibrating barrel 20 and the needle portion 42 partially protruding from the through hole 202 .
  • One end of the needle base 41 abuts the stepped portion of the through hole 202 and the other end abuts the end of the mounting portion 242 of the cover member 24 .
  • fixed for The needle portion 42 has flexibility or bendability.
  • the needle part 42 has a twisted part over a distance L from its tip (diameter d1).
  • the angle ⁇ formed by the outer contour of the twisted portion of the needle portion 42 with respect to the central axis O of the needle portion 42 is within the range of arctan 0.018 to arctan 0.022.
  • the twist angle of the twisted portion is, for example, within the range of 30° to 60°.
  • the tip diameter d1 of the needle portion 42 is within the range of 0.28 mm to 0.32 mm.
  • the diameter d1 at the tip of the needle portion 42 is 0.30 mm and the length L of the twisted portion of the needle portion 42 is 13 mm
  • the diameter d2 at the rear end of the twisted portion of the needle portion 42 is , in the range of 0.534 mm to 0.586 mm.
  • the protruding length of the needle portion 42 from the needle base 41 is designed to be 25 mm, which is longer than the length L of the twisted portion, for example.
  • a long metal plate is prepared (FIG. 3/STEP 1).
  • the metal plate is made of nickel-titanium alloy, for example.
  • the lengthwise size, widthwise size, planar shape, and thickness of the metal plate are determined by: It is determined by taking into account the angle ⁇ formed by the outer contour of the twisted portion of the needle portion 42 and the twist angle of the twisted portion.
  • the metal plate is twisted around an axis parallel to its longitudinal direction to produce a needle portion intermediate, which is an intermediate product (Fig. 3/STEP 2).
  • the diameter of the tip of the intermediate needle portion is smaller than the diameter d1 of the tip of the needle portion 42, and the length of the twisted portion of the intermediate needle portion is longer than the length L of the twisted portion of the needle portion 42.
  • the diameter of the tip of the intermediate needle portion is 0.25 mm
  • the angle ⁇ of the outer contour of the twisted portion with respect to the central axis of the intermediate needle portion is arctan 0.02
  • the length of the twisted portion is 15 mm. Twisting is performed to 0.5 mm.
  • the tip of the intermediate needle portion is cut off (Fig. 3/STEP 3).
  • the needle portion 42 having the configuration shown in FIG. 2 is produced.
  • a needle having a tip diameter of 0.25 mm, an angle ⁇ of the outer contour of the twisted portion with respect to the central axis of the needle intermediate body of arctan 0.02, and a length of the twisted portion of 15.5 mm. If the section intermediate is cut at a length of 2.5 mm from its tip, a needle section 42 with a tip diameter of 0.30 mm and a twist length of 15.5 mm is produced.
  • surface smoothing is performed on the distal end of the needle portion 42 (FIG. 3/STEP 4).
  • burrs generated during cutting of the needle intermediate body are removed by grinding means such as a file.
  • a carbon coating layer such as a DLC layer or a plating layer such as a nickel plating layer may be formed on the distal end portion of the needle portion 42 . Note that the processing of STEP4 may be omitted.
  • the needle portion 42 is installed in a mold, and resin is poured into the cavity of the mold.
  • a dental piece 40 such as a structured file, is made.
  • a dental handpiece 10 as the second embodiment of the present invention shown in FIG. 4 has substantially the same configuration as the dental handpiece 10 as the first embodiment of the present invention shown in FIG. , and the common components are denoted by the same reference numerals, and the description thereof is omitted.
  • a substantially annular cam hole extending over the entire circumference is provided on the outside of the side wall of the vibrating cylinder 20 .
  • a cam groove 211 (cam concave portion) is formed.
  • a cam pin 111 of the rotating member 110 is fitted in the cam groove 211 of the vibrating cylinder 20 .
  • the cam groove 211 extends in the circumferential direction over a portion (for example, 0° to 350°) of the azimuth angle range of 0° to 360° with respect to the central axis of the vibrating cylinder 20, and intermittently at one point. It may be formed on the outside of the side wall of the vibrating cylinder 20 in an annular shape.
  • the guide groove on the inner side wall of the second cylindrical member 12 see reference numeral 122 in FIG. 1
  • the guide pin on the outer side wall of the vibration cylinder 20 see reference numeral 22 in FIG. 1 are omitted.
  • the needle part 42 Since the needle part 42 is bendable, the needle part 42 can be inserted into root canals having different shapes depending on the patient and the tooth, thereby facilitating the root canal treatment work. Even if there is resistance to the reciprocating motion of the file 40, or even if it is likely to dig into the root canal, it can be avoided, and the twisting and/or bending of the needle part 42 is less likely to occur, allowing smooth reciprocation. Exercise can be continued.

Abstract

Provided is a dental piece such as a file that suppresses excessive bending at a tip end portion of a needle part and can strengthen the abutting force of a side portion of the needle part against a root canal wall section. Also provided are a method for manufacturing the dental piece, and a dental handpiece in which the dental piece is used. A twisting section is formed in a needle part 42 across a distance L from the tip end (diameter d1) of the needle part 42. An angle θ formed by an outer contour of the twisting section of the needle part 42 in relation to a center axial line O of the needle part 42 is included in a range from arctan 0.018 to arctan 0.022. A twist angle of the twisting section is included in a range of, for example, 30-60º. The diameter d1 of the tip end of the needle part 42 is included in a range of 0.28-0.32 mm.

Description

歯科用ピースおよびその製造方法ならびに歯科用ハンドピースDental piece, manufacturing method thereof, and dental handpiece
　本発明は、歯の根管を治療すべく、先端部に取り付けられたファイルおよび／またはリーマなどの歯科用ピース、およびこれを駆動するための歯科用ハンドピースに関する。 The present invention relates to a dental piece such as a file and/or a reamer attached to the tip and a dental handpiece for driving the same for treating the root canal of a tooth.
　患者の虫歯の根の壁面のこそぎ取り、根の先に詰まっている膿の塊および／または充填材の除去および／または神経の抜去など、根管治療等に際して、一般的に歯科用ピースとしてのファイルおよび／またはリーマが用いられる。例えば、ガッタパーチャ（根管充填剤）は、一般的にファイルが用いられて除去される。 Generally used as a dental piece for root canal treatment, such as scraping the wall of the root of a patient's decayed tooth, removing a pus block and/or filling material stuck at the tip of the root, and/or removing the nerve. files and/or reamers are used. For example, gutta-percha (root canal filling material) is commonly removed using a file.
　しかし、例えば、先端部の直径が０．２５ｍｍであり、当該先端部から１６ｍｍだけ後方部分の直径が０．５７ｍｍである針部を有するファイルが用いられた場合、当該針部の先端部が過度に撓むことにって当該針部の側部の根管壁に対する当接力が過度に低下する可能性がある。 However, for example, when a file having a needle with a diameter of 0.25 mm at the tip and a diameter of 0.57 mm at a portion 16 mm behind the tip is used, the tip of the needle is excessively There is a possibility that the contact force of the side portion of the needle portion against the root canal wall may be excessively reduced due to the bending.
　そこで、本発明は、針部の先端部の過度な撓みを抑制し、当該針部の側部の根管壁部に対する当接力の増強を図りうるファイル等の歯科用ピースおよびその製造方法、ならびに、当該歯科用ピースが用いられる歯科用ハンドピースを提供することを目的とする。 Accordingly, the present invention provides a dental piece such as a file capable of suppressing excessive bending of the tip of the needle and increasing the contact force of the side of the needle with respect to the root canal wall, and a method for manufacturing the same. , an object of the present invention is to provide a dental handpiece in which the dental piece is used.
　本発明は、
　針基体と、
　前記針基体の一端部から延在し、基端部から先端部にかけて徐々に縮径するように形成されている針部と、
を備えている歯科用ピースに関する。 The present invention
a needle base;
a needle portion extending from one end portion of the needle base body and formed so as to gradually decrease in diameter from the proximal end portion to the distal end portion;
A dental piece comprising:
　本発明の歯科用ピースにおいては、
　前記針部の先端部の直径が０．３０ｍｍ以上であり、かつ、前記針部の中心軸線に対する外側輪郭の傾斜角度がａｒｃｔａｎ０．０１８～ａｒｃｔａｎ０．０２２の範囲に含まれている。 In the dental piece of the present invention,
The tip of the needle has a diameter of 0.30 mm or more, and the inclination angle of the outer contour with respect to the central axis of the needle falls within the range of arctan 0.018 to arctan 0.022.
　本発明の歯科用ピースを製造する方法は、
　長尺の金属板に対して捻り加工を施すことにより、先端の直径が前記針部の先端の直径であり、かつ、中心軸線に対する外側輪郭の傾斜角度がａｒｃｔａｎ０．０１８～ａｒｃｔａｎ０．０２２の範囲に含まれている針部中間体を作製する工程と、
　前記針部中間体の先端部を切断することにより前記針部を作製する工程と、を含んでいる。 The method for manufacturing the dental piece of the present invention comprises
By twisting a long metal plate, the diameter of the tip is the diameter of the tip of the needle portion, and the inclination angle of the outer contour with respect to the central axis is in the range of arctan 0.018 to arctan 0.022. creating a needle portion intermediate comprising;
forming the needle by cutting the distal end of the needle intermediate.
　当該歯科用ピースの製造方法において、
　前記針部の少なくとも先端部に表面円滑処理を施す工程を含んでいることが好ましい。 In the method for manufacturing the dental piece,
It is preferable to include a step of applying a surface smoothing treatment to at least the tip portion of the needle portion.
　本発明の歯科用ハンドピースは、
　第１筒状部材と、
　側壁に前記第１筒状部材の内部空間に連続する連通孔が形成され、当該側壁において前記第１筒状部材の一端部に対して接続されている第２筒状部材と、
　前記構成の歯科用ピースと、
　前記歯科用ピースの前記針部を外部空間に突出させた状態で前記針基体を支持し、前記第２筒状部材に同軸の姿勢で挿通されている振動筒と、
　前記連通孔を介して一端部が前記第２筒状部材の内部空間に向けられるように、前記第１筒状部材の内部空間に配置されている回転部材と、
　前記回転部材を中心軸線まわりに回転駆動させるアクチュエータと、を備え、
　前記回転部材の一端部に、当該回転部材の中心軸線に対して偏心した位置において突出するカム凸部が設けられ、
　前記振動筒の側壁外側に前記カム凸部が嵌め込まれるカム凹部が形成されている。 The dental handpiece of the present invention is
a first tubular member;
a second tubular member having a side wall formed with a communication hole communicating with the internal space of the first tubular member and connected to one end of the first tubular member at the side wall;
a dental piece configured as described above;
a vibrating cylinder that supports the needle base with the needle portion of the dental piece projecting into an external space, and that is coaxially inserted through the second cylindrical member;
a rotary member arranged in the internal space of the first tubular member such that one end faces the internal space of the second tubular member through the communication hole;
an actuator that rotates the rotating member about a central axis,
one end of the rotating member is provided with a cam protrusion projecting at a position eccentric with respect to the central axis of the rotating member;
A cam concave portion into which the cam convex portion is fitted is formed on the outside of the side wall of the vibrating cylinder.
本発明の第1実施形態としての歯科用ハンドピースの構成説明図。FIG. 1 is an explanatory diagram of the configuration of a dental handpiece as a first embodiment of the present invention; 本発明の一実施形態としての歯科用ピースの構成説明図。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory diagram of the configuration of a dental piece as one embodiment of the present invention; 図２の歯科用ピースの製造方法に関する説明図。FIG. 3 is an explanatory diagram relating to a method for manufacturing the dental piece of FIG. 2; 本発明の第２実施形態としての歯科用ハンドピースの構成説明図。FIG. 4 is a configuration explanatory diagram of a dental handpiece as a second embodiment of the present invention;
　（第1実施形態）（構成）
　図１に模式的に示されている本発明の第１実施形態としての歯科用ハンドピース１０は、歯科用ピースとしてのファイル４０（またはリーマ）を駆動するように構成されている。歯科用ハンドピース１０は、第１筒状部材１１と、第２筒状部材１２（支持筒）と、振動筒２０と、を備えている。第１筒状部材１１は略円筒状に形成されている。第２筒状部材１２は略円筒状に形成され、当該第２筒状部材１２の中心軸線が第１筒状部材１１の中心軸線と一定角度（例えば、９０°～１２０°の角度範囲に含まれる）をなすまたは交差するような姿勢で、第１筒状部材１１の先端部に対して振動筒２０がその側壁において接続されている。第２筒状部材１２の内部空間には、振動筒２０が第２筒状部材１２と略同軸な姿勢で、かつ、第２筒状部材１２の中心軸線に平行な方向（図１および図２の上下方向）に振動可能に挿通されている。 (First Embodiment) (Configuration)
A dental handpiece 10 as a first embodiment of the present invention schematically shown in FIG. 1 is configured to drive a file 40 (or reamer) as a dental piece. The dental handpiece 10 includes a first tubular member 11 , a second tubular member 12 (supporting tube), and a vibrating tube 20 . The first tubular member 11 is formed in a substantially cylindrical shape. The second cylindrical member 12 is formed in a substantially cylindrical shape, and the central axis of the second cylindrical member 12 is included in the central axis of the first cylindrical member 11 at a certain angle (for example, within an angle range of 90° to 120°). A vibrating cylinder 20 is connected to the distal end portion of the first cylindrical member 11 at its side wall in such a posture as to form or cross the first cylindrical member 11 . In the inner space of the second cylindrical member 12, the vibrating cylinder 20 is positioned substantially coaxially with the second cylindrical member 12 and in a direction parallel to the central axis of the second cylindrical member 12 (FIGS. 1 and 2). vertical direction) is inserted so as to be able to vibrate.
　第１筒状部材１１、第２筒状部材１２および振動筒２０は、アルミニウム合金、ステンレスなどの金属により形成されている。第１筒状部材１１および第２筒状部材１２は同一金属により一体的に構成されている。振動筒２０は、第１筒状部材１１および第２筒状部材１２と同一の金属により構成されていてもよく、異なる金属により構成されていてもよい。 The first cylindrical member 11, the second cylindrical member 12 and the vibration cylinder 20 are made of metal such as aluminum alloy and stainless steel. The first tubular member 11 and the second tubular member 12 are integrally made of the same metal. The vibrating cylinder 20 may be made of the same metal as the first tubular member 11 and the second tubular member 12, or may be made of a different metal.
　図１に示されているように、第１筒状部材１１の内部空間には、略円柱状の回転部材１１０が、その中心軸線が第１筒状部材１１の長手方向に平行または略平行に延在する姿勢で配置されている。回転部材１１０の先端部は比較的大径の略円柱状に形成されている。図１および図２に示されているように、当該先端部には、回転部材１１０の中心軸線に対して偏心して当該中心軸線に平行な方向に突出するカムピン１１１が設けられている。回転部材１１０の先端部に中心軸線に平行に延在するピン装着穴が形成され、カムピン１１１が当該ピン装着穴に着脱自在に装着されていてもよい。回転部材１１０は、チェアーユニットの電動モータの回転軸に接続されて中心軸線まわりに回転駆動されるように構成されている。電動モータの動作をＯＮ／ＯＦＦ制御するためのスイッチは、例えば、足踏み式のフットスイッチにより構成されている（図示略）。 As shown in FIG. 1 , in the inner space of the first tubular member 11 , a substantially cylindrical rotary member 110 is arranged with its center axis parallel or substantially parallel to the longitudinal direction of the first tubular member 11 . It is placed in an extended position. The tip of the rotating member 110 is formed in a substantially cylindrical shape with a relatively large diameter. As shown in FIGS. 1 and 2, the distal end portion is provided with a cam pin 111 that is eccentric with respect to the central axis of the rotary member 110 and protrudes in a direction parallel to the central axis. A pin mounting hole extending parallel to the central axis may be formed in the distal end portion of the rotating member 110, and the cam pin 111 may be detachably mounted in the pin mounting hole. The rotating member 110 is configured to be connected to the rotating shaft of the electric motor of the chair unit and driven to rotate about the central axis. A switch for ON/OFF-controlling the operation of the electric motor is, for example, a foot switch (not shown).
　図１に示されているように、第２筒状部材１２の側壁に形成された連通孔１２１を通じて、第１筒状部材１１の内部空間と第２筒状部材１２の内部空間とは連通している。図１に示されているように、第２筒状部材１２の側壁内側には、第２筒状部材１２の中心軸線を基準として連通孔１２１とは異なる方位角位置（例えば、反対側）において、中心軸線に平行に延在しながら窪んでいるガイド溝１２２が形成されている。 As shown in FIG. 1, the inner space of the first tubular member 11 and the inner space of the second tubular member 12 communicate with each other through a communication hole 121 formed in the side wall of the second tubular member 12. ing. As shown in FIG. 1, on the inner side of the side wall of the second tubular member 12, at a different azimuth position (for example, opposite side) from the communication hole 121 with respect to the central axis of the second tubular member 12. , a recessed guide groove 122 extending parallel to the central axis is formed.
　図１に示されているように、振動筒２０の側壁外側には径方向に局所的に窪んでいるカム穴２１（カム凹部）が形成されている。振動筒２０の側壁外側には、その中心軸線を基準としてカム穴２１とは異なる方位角位置（例えば、反対側）から径方向に突出するガイドピン２２が設けられている。振動筒２０のカム穴２１に回転部材１１０のカムピン１１１が嵌め込まれている。カムピン１１１およびカム穴２１の間に、振動筒２０の周方向（および必要に応じて軸線方向）について遊びが生じるように、カム穴２１が当該周方向についてカムピン１１１よりも幅広に形成されている。振動筒２０のガイドピン２２が第２筒状部材１２のガイド溝１２２に嵌め込まれている。ガイドピン２２およびガイド溝１２２の間に、振動筒２０の周方向について遊び（カムピン１１１およびカム穴２１の間の遊びより小さくてもよい）が生じるように、ガイド溝１２２が当該周方向についてガイドピン２２よりも幅広に形成されている。 As shown in FIG. 1, a cam hole 21 (cam concave portion) that is locally recessed in the radial direction is formed on the outer side wall of the vibrating cylinder 20 . A guide pin 22 is provided on the outside of the side wall of the vibrating cylinder 20 and protrudes radially from a different azimuth position (for example, the opposite side) from the cam hole 21 with respect to the center axis. A cam pin 111 of a rotating member 110 is fitted into the cam hole 21 of the vibrating cylinder 20 . The cam hole 21 is formed wider than the cam pin 111 in the circumferential direction (and axial direction if necessary) of the vibrating cylinder 20 so that there is play between the cam pin 111 and the cam hole 21. . The guide pin 22 of the vibrating cylinder 20 is fitted into the guide groove 122 of the second tubular member 12 . The guide groove 122 guides the guide pin 22 and the guide groove 122 in the circumferential direction so that there is play (which may be smaller than the play between the cam pin 111 and the cam hole 21) in the circumferential direction of the vibrating barrel 20. It is formed wider than the pin 22 .
　図１に示されているように、振動筒２０の内部空間は、一端側で装着口２０１を通じて外部空間に連通し、他端側で装着口２０１よりも小径の貫通孔２０２を通じて外部空間に連通している。振動筒２０の内部空間は、装着口２０１に蓋部材２４が取り付けられることにより一端側が閉じられる。図１に示されているように、蓋部材２４は、略円板形状の頭部２４１と、頭部２４１の一端から突出する略円柱状の装着部２４２と、により構成されている。振動筒２０の装着口２０１における側壁内側にはメネジが形成され、蓋部材２４の装着部２４２の側面には当該メネジに螺合するオネジが形成されている。振動筒２０のメネジおよび／蓋部材２４のオネジが省略され、蓋部材２４の装着部２４２が振動筒２０の側壁内側に圧接されることで振動筒２０に嵌着されていてもよい。蓋部材２４は、アルミニウム合金、ステンレスなどの金属により形成されている。 As shown in FIG. 1, the inner space of the vibrating barrel 20 communicates with the external space through a mounting opening 201 on one end side, and communicates with the external space through a through hole 202 having a smaller diameter than the mounting opening 201 on the other end side. are doing. One end of the internal space of the vibration cylinder 20 is closed by attaching the cover member 24 to the mounting opening 201 . As shown in FIG. 1 , the lid member 24 is composed of a substantially disk-shaped head portion 241 and a substantially cylindrical mounting portion 242 protruding from one end of the head portion 241 . A female thread is formed on the inner side wall of the mounting opening 201 of the vibrating cylinder 20 , and a male thread is formed on the side surface of the mounting portion 242 of the cover member 24 to be screwed into the female thread. The female thread of the vibrating cylinder 20 and/or the male thread of the lid member 24 may be omitted, and the mounting portion 242 of the lid member 24 may be fitted to the vibrating cylinder 20 by being pressed against the inner side wall of the vibrating cylinder 20 . The lid member 24 is made of metal such as aluminum alloy or stainless steel.
　（機能）
　回転部材１１０が回転駆動されることにより、カムピン１１１を通じて振動筒２０に対して中心軸線方向に振動力が作用し、ガイドピン２２が第２筒状部材１２のガイド溝１２２に沿って案内されることにより、振動筒２０が第２筒状部材１２に対して軸線方向に振動駆動される。また、振動筒２０の貫通孔２０２から突出している針部４２が振動するので、施術者は振動する針部４２を患者の歯の対象部位に当てて、根管治療等を実施することができる。 (function)
When the rotary member 110 is rotationally driven, a vibration force acts on the vibration cylinder 20 in the central axis direction through the cam pin 111, and the guide pin 22 is guided along the guide groove 122 of the second cylindrical member 12. As a result, the vibration cylinder 20 is driven to vibrate in the axial direction with respect to the second cylindrical member 12 . Further, since the needle portion 42 protruding from the through hole 202 of the vibration cylinder 20 vibrates, the operator can apply the vibrating needle portion 42 to the target site of the patient's tooth to perform root canal treatment or the like. .
　（針部の構成）
　図１および図２に示されているように、ファイル４０は針基体４１および針部４２を備えている。針部４２は、略円柱状の針基体４１の一端側から軸線方向に突出するように、当該針基体４１に対して固定されている。針部４２は、基端部から先端部にかけて徐々に縮径するように形成されている。ファイル４０は、針基体４１が振動筒２０の内部空間に収容され、針部４２が貫通孔２０２から部分的に突出した状態で、振動筒２０に取り付けられている。針基体４１が一端側で貫通孔２０２の段差部に当接し、かつ、他端側で蓋部材２４の装着部２４２の端部に当接することにより、針基体４１、ひいてはファイル４０が振動筒２０に対して固定されている。針部４２は可撓性または屈曲可能性を有している。 (Structure of Needle Part)
As shown in FIGS. 1 and 2, file 40 comprises needle base 41 and needle portion 42 . The needle part 42 is fixed to the needle base body 41 so as to protrude in the axial direction from one end side of the substantially cylindrical needle base body 41 . The needle portion 42 is formed so as to gradually decrease in diameter from the proximal portion to the distal portion. The file 40 is attached to the vibrating barrel 20 with the needle base 41 housed in the inner space of the vibrating barrel 20 and the needle portion 42 partially protruding from the through hole 202 . One end of the needle base 41 abuts the stepped portion of the through hole 202 and the other end abuts the end of the mounting portion 242 of the cover member 24 . fixed for The needle portion 42 has flexibility or bendability.
　図２に示されているように、針部４２には、その先端（直径ｄ１）から距離Ｌにわたって捻れ部が形成されている。針部４２の中心軸線Ｏに対して、針部４２の捻れ部の外側輪郭がなす角度θはａｒｃｔａｎ０．０１８～ａｒｃｔａｎ０．０２２の範囲に含まれている。捻れ部の捻れ角度は、例えば、３０°～６０°の範囲に含まれている。針部４２の先端の直径ｄ１は０．２８ｍｍ～０．３２ｍｍの範囲に含まれている。このため、例えば、針部４２の先端の直径ｄ１が０．３０ｍｍであり、針部４２の捻れ部の長さＬが１３ｍｍである場合、当該針部４２の捻れ部の後端における直径ｄ２は、０．５３４ｍｍ～０．５８６ｍｍの範囲に含まれている。針部４２の針基体４１からの突出長は、例えば、捻れ部の長さＬよりも大きい２５ｍｍに設計されている。 As shown in FIG. 2, the needle part 42 has a twisted part over a distance L from its tip (diameter d1). The angle θ formed by the outer contour of the twisted portion of the needle portion 42 with respect to the central axis O of the needle portion 42 is within the range of arctan 0.018 to arctan 0.022. The twist angle of the twisted portion is, for example, within the range of 30° to 60°. The tip diameter d1 of the needle portion 42 is within the range of 0.28 mm to 0.32 mm. Therefore, for example, when the diameter d1 at the tip of the needle portion 42 is 0.30 mm and the length L of the twisted portion of the needle portion 42 is 13 mm, the diameter d2 at the rear end of the twisted portion of the needle portion 42 is , in the range of 0.534 mm to 0.586 mm. The protruding length of the needle portion 42 from the needle base 41 is designed to be 25 mm, which is longer than the length L of the twisted portion, for example.
　（針部の製造方法）
　前記構成の針部４２の製造に際して、まず長尺の金属板が用意される（図３／ＳＴＥＰ１）。金属板は、例えば、ニッケル－チタン合金により構成されている。金属板の長手方向のサイズおよび短手方向のサイズ、平面形状ならびに厚さは、針部４２の金属板の長手方向のサイズおよび短手方向のサイズ、針部４２の中心軸線Ｏに対して、針部４２の捻れ部の外側輪郭がなす角度θならびに捻れ部の捻れ角度などが勘案されることにより定められている。 (Manufacturing method of needle part)
When manufacturing the needle portion 42 having the above configuration, first, a long metal plate is prepared (FIG. 3/STEP 1). The metal plate is made of nickel-titanium alloy, for example. The lengthwise size, widthwise size, planar shape, and thickness of the metal plate are determined by: It is determined by taking into account the angle θ formed by the outer contour of the twisted portion of the needle portion 42 and the twist angle of the twisted portion.
　次に、金属板にその長手方向に平行な軸線まわりに捻り加工が施されることにより、中間製品である針部中間体が作製される（図３／ＳＴＥＰ２）。針部中間体の先端の直径は、針部４２の先端の直径ｄ１よりも小径であり、針部中間体の捻れ部の長さは、針部４２の捻れ部の長さＬよりも長い。例えば、針部中間体の先端の直径が０．２５ｍｍになり、針部中間体の中心軸線に対する捻れ部の外側輪郭の角度θがａｒｃｔａｎ０．０２になり、かつ、当該捻れ部の長さが１５．５ｍｍになるように捻り加工が実行される。 Next, the metal plate is twisted around an axis parallel to its longitudinal direction to produce a needle portion intermediate, which is an intermediate product (Fig. 3/STEP 2). The diameter of the tip of the intermediate needle portion is smaller than the diameter d1 of the tip of the needle portion 42, and the length of the twisted portion of the intermediate needle portion is longer than the length L of the twisted portion of the needle portion 42. For example, the diameter of the tip of the intermediate needle portion is 0.25 mm, the angle θ of the outer contour of the twisted portion with respect to the central axis of the intermediate needle portion is arctan 0.02, and the length of the twisted portion is 15 mm. Twisting is performed to 0.5 mm.
　続いて、針部中間体の先端部が切断除去される（図３／ＳＴＥＰ３）。これにより、図２に示されている前記構成を有する針部４２が作製される。例えば、先端の直径が０．２５ｍｍであり、針部中間体の中心軸線に対する捻れ部の外側輪郭の角度θがａｒｃｔａｎ０．０２であり、かつ、当該捻れ部の長さが１５．５ｍｍである針部中間体が、その先端から長さ２．５ｍｍの部分で切断された場合、先端の直径が０．３０ｍｍであり、捻れ部の長さが１５．５ｍｍである針部４２が作製される。 Subsequently, the tip of the intermediate needle portion is cut off (Fig. 3/STEP 3). Thereby, the needle portion 42 having the configuration shown in FIG. 2 is produced. For example, a needle having a tip diameter of 0.25 mm, an angle θ of the outer contour of the twisted portion with respect to the central axis of the needle intermediate body of arctan 0.02, and a length of the twisted portion of 15.5 mm. If the section intermediate is cut at a length of 2.5 mm from its tip, a needle section 42 with a tip diameter of 0.30 mm and a twist length of 15.5 mm is produced.
　さらに、針部４２の先端部に対して表面円滑処理が実行される（図３／ＳＴＥＰ４）。例えば、針部中間体の切断に際して生じたバリがやすり等の研削手段により除去される。これに代えてまたは加えて、針部４２の先端部にＤＬＣ層などのカーボン被覆層またはニッケルメッキ層などのメッキ層が形成されてもよい。なお、ＳＴＥＰ４の処理が省略されもよい。 Furthermore, surface smoothing is performed on the distal end of the needle portion 42 (FIG. 3/STEP 4). For example, burrs generated during cutting of the needle intermediate body are removed by grinding means such as a file. Instead of or in addition to this, a carbon coating layer such as a DLC layer or a plating layer such as a nickel plating layer may be formed on the distal end portion of the needle portion 42 . Note that the processing of STEP4 may be omitted.
　針部４２が金型に設置され、当該金型のキャビティに樹脂が流し込まれることにより、当該キャビティの形状に応じた針基体４１およびこれに基端部が埋設かつ固定されている針部４２により構成されるファイル等の歯科用ピース４０が作製される。 The needle portion 42 is installed in a mold, and resin is poured into the cavity of the mold. A dental piece 40, such as a structured file, is made.
　（第２実施形態）（構成）
　図４に示されている本発明の第２実施形態としての歯科用ハンドピース１０は、図１に示されている本発明の第１実施形態としての歯科用ハンドピース１０とほぼ同様の構成であり、共通する構成については共通の符号を用いるとともに説明を省略する。 (Second Embodiment) (Configuration)
A dental handpiece 10 as the second embodiment of the present invention shown in FIG. 4 has substantially the same configuration as the dental handpiece 10 as the first embodiment of the present invention shown in FIG. , and the common components are denoted by the same reference numerals, and the description thereof is omitted.
　図４に示されているように、振動筒２０の側壁外側に、第１実施形態のカム穴（図１の符号２１参照）に代えて、周方向に全周にわたり延在する略円環状のカム溝２１１（カム凹部）が形成されている。振動筒２０のカム溝２１１には、回転部材１１０のカムピン１１１が嵌め込まれている。カム溝２１１は、振動筒２０の中心軸線を基準とした方位角範囲０°～３６０°のうち一部（例えば、０°～３５０°）にわたり周方向に延在する、１箇所で断続している環状に振動筒２０の側壁外側に形成されていてもよい。第１実施形態とは異なり、第２筒状部材１２の側壁内側におけるガイド溝（図１の符号１２２参照）および振動筒２０の側壁外側におけるガイドピン（図１の符号２２参照）が省略されている。 As shown in FIG. 4, instead of the cam hole (see reference numeral 21 in FIG. 1) of the first embodiment, a substantially annular cam hole extending over the entire circumference is provided on the outside of the side wall of the vibrating cylinder 20 . A cam groove 211 (cam concave portion) is formed. A cam pin 111 of the rotating member 110 is fitted in the cam groove 211 of the vibrating cylinder 20 . The cam groove 211 extends in the circumferential direction over a portion (for example, 0° to 350°) of the azimuth angle range of 0° to 360° with respect to the central axis of the vibrating cylinder 20, and intermittently at one point. It may be formed on the outside of the side wall of the vibrating cylinder 20 in an annular shape. Unlike the first embodiment, the guide groove on the inner side wall of the second cylindrical member 12 (see reference numeral 122 in FIG. 1) and the guide pin on the outer side wall of the vibration cylinder 20 (see reference numeral 22 in FIG. 1) are omitted. there is
　（機能）
　回転部材１１０が回転駆動されることにより、カムピン１１１を通じて振動筒２０に対して中心軸線方向に振動力が作用し、ガイドピン２２が第２筒状部材１２のガイド溝１２２に沿って案内されることにより、振動筒２０が第２筒状部材１２に対して軸線方向に振動駆動される。さらに、振動筒２０がカム溝２１１に沿ってカムピン１１１に対して周方向に相対的に回動する。これにより、振動筒２０の貫通孔２０２から突出している針部４２が軸線方向に振動しながら軸線方向まわりに回動するので、施術者は針部４２を患者の歯の対象部位に当てて、根管治療等を実施することができる。 (function)
When the rotary member 110 is rotationally driven, a vibration force acts on the vibration cylinder 20 in the central axis direction through the cam pin 111, and the guide pin 22 is guided along the guide groove 122 of the second cylindrical member 12. As a result, the vibration cylinder 20 is driven to vibrate in the axial direction with respect to the second cylindrical member 12 . Further, the vibrating cylinder 20 rotates along the cam groove 211 relative to the cam pin 111 in the circumferential direction. As a result, the needle portion 42 protruding from the through hole 202 of the vibration cylinder 20 rotates in the axial direction while vibrating in the axial direction. Root canal treatment and the like can be performed.
　針部４２が屈曲可能であることにより、患者の別かつ歯の別によって形状が相違する根管に針部４２を進入させ、根管治療作業の容易が図られる。ファイル４０の往復運動に対する抵抗があっても、あるいは根管に喰い込みそうになることがあったとしても、それを避けることができ、針部４２の捩じれおよび／または曲がりが起こりにくく円滑に往復運動を継続させることができる。 Since the needle part 42 is bendable, the needle part 42 can be inserted into root canals having different shapes depending on the patient and the tooth, thereby facilitating the root canal treatment work. Even if there is resistance to the reciprocating motion of the file 40, or even if it is likely to dig into the root canal, it can be avoided, and the twisting and/or bending of the needle part 42 is less likely to occur, allowing smooth reciprocation. Exercise can be continued.
本発明の効果Effects of the present invention
　本発明のファイル４０（歯科用ピース）が採用されることにより、針部４２の先端部（捻れ部）の過度な撓みが抑制され、歯の根管の壁部に対する針部４２の外側面の当接力の増強が図られている。これにより、根管拡大等の作業効率が向上し、ひいては感染象牙質等の取り残しが回避されうる。このため、施術者の負担が軽減される。 By adopting the file 40 (dental piece) of the present invention, excessive bending of the distal end portion (twisted portion) of the needle portion 42 is suppressed, and the outer surface of the needle portion 42 with respect to the wall portion of the root canal of the tooth. The contact force is enhanced. As a result, work efficiency such as root canal enlargement can be improved, and thus infected dentin and the like can be avoided from being left behind. Therefore, the burden on the operator is reduced.
１０‥歯科用ハンドピース
１１‥第１筒状部材
１２‥第２筒状部材（支持筒）
２０‥振動筒
２１‥カム穴（カム凹部）
２２‥ガイドピン
２４‥蓋部材
４０‥ファイル（歯科用ピース）
４１‥針基体
４２‥針部
１００‥反射防止層
１１０‥回転部材
１１１‥カムピン（カム凸部）
１２１‥連通孔
１２２‥ガイド溝
２０１‥装着口
２０２‥貫通孔
２１１‥カム溝
２４１‥頭部
２４２‥装着部。
  10... Dental hand piece 11... First tubular member 12... Second tubular member (support tube)
20... Vibration cylinder 21... Cam hole (cam recess)
22... Guide pin 24... Lid member 40... File (dental piece)
41... Needle base 42... Needle part 100... Anti-reflection layer 110... Rotating member 111... Cam pin (cam convex part)
121... Communication hole 122... Guide groove 201... Mounting port 202... Through hole 211... Cam groove 241... Head 242... Mounting part.

Claims (4)

  1. 　針基体と、
    　前記針基体の一端部から延在し、基端部から先端部にかけて徐々に縮径するように形成されている針部と、
    を備えている歯科用ピースであって、
    　前記針部の先端の直径が０．２８ｍｍ～０．３２ｍｍの範囲に含まれ、かつ、前記針部の中心軸線に対する外側輪郭の傾斜角度がａｒｃｔａｎ０．０１８～ａｒｃｔａｎ０．０２２の範囲に含まれている
    歯科用ピース。     a needle base;
    a needle portion extending from one end portion of the needle base body and formed so as to gradually decrease in diameter from the proximal end portion to the distal end portion;
    A dental piece comprising
    The diameter of the tip of the needle is within the range of 0.28 mm to 0.32 mm, and the inclination angle of the outer contour with respect to the central axis of the needle is within the range of arctan 0.018 to arctan 0.022. dental piece.
  2. 　請求項１に記載の歯科用ピースを製造する方法であって、
    　長尺の金属板に対して捻り加工を施すことにより、先端の直径が前記針部の先端の直径であり、かつ、中心軸線に対する外側輪郭の傾斜角度がａｒｃｔａｎ０．０１８～ａｒｃｔａｎ０．０２２の範囲に含まれている針部中間体を作製する工程と、
    　前記針部中間体の先端部を切断することにより前記針部を作製する工程と、を含んでいる
    歯科用ピースの製造方法。     A method of manufacturing a dental piece according to claim 1, comprising:
    By twisting a long metal plate, the diameter of the tip is the diameter of the tip of the needle portion, and the inclination angle of the outer contour with respect to the central axis is in the range of arctan 0.018 to arctan 0.022. creating a needle portion intermediate comprising;
    A method of manufacturing a dental piece, comprising a step of producing the needle portion by cutting the distal end portion of the needle portion intermediate body.
  3. 　請求項２に記載の歯科用ピースの製造方法において、
    　前記針部の少なくとも先端部に表面円滑処理を施す工程を含んでいる
    歯科用ピースの製造方法。     In the method for manufacturing a dental piece according to claim 2,
    A method for manufacturing a dental piece, comprising the step of applying a surface smoothing treatment to at least the tip portion of the needle portion.
  4. 　第１筒状部材と、
    　側壁に前記第１筒状部材の内部空間に連続する連通孔が形成され、当該側壁において前記第１筒状部材の一端部に対して接続されている第２筒状部材と、
    　請求項１に記載の歯科用ピースと、
    　前記歯科用ピースの前記針部を外部空間に突出させた状態で前記針基体を支持し、前記第２筒状部材に同軸の姿勢で挿通されている振動筒と、
    　前記連通孔を介して一端部が前記第２筒状部材の内部空間に向けられるように、前記第１筒状部材の内部空間に配置されている回転部材と、
    　前記回転部材を中心軸線まわりに回転駆動させるアクチュエータと、を備え、
    　前記回転部材の一端部に、当該回転部材の中心軸線に対して偏心した位置において突出するカム凸部が設けられ、
    　前記振動筒の側壁外側に前記カム凸部が嵌め込まれるカム凹部が形成されている
    歯科用ハンドピース。
          a first tubular member;
    a second tubular member having a side wall formed with a communication hole communicating with the internal space of the first tubular member and connected to one end of the first tubular member at the side wall;
    A dental piece according to claim 1;
    a vibrating cylinder that supports the needle base with the needle portion of the dental piece projecting into an external space, and that is coaxially inserted through the second cylindrical member;
    a rotary member arranged in the internal space of the first tubular member such that one end faces the internal space of the second tubular member through the communication hole;
    an actuator that rotates the rotating member about a central axis,
    one end of the rotating member is provided with a cam protrusion projecting at a position eccentric with respect to the central axis of the rotating member;
    A dental handpiece, wherein a cam recess into which the cam protrusion is fitted is formed on the outer side wall of the vibrating cylinder.
PCT/JP2022/016281 2021-09-06 2022-03-30 Dental piece, method for manufacturing same, and dental handpiece WO2023032337A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021165782 2021-09-06
JP2021-165782 2021-09-06

Publications (1)

Publication Number Publication Date
WO2023032337A1 true WO2023032337A1 (en) 2023-03-09

Family

ID=85412060

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/016281 WO2023032337A1 (en) 2021-09-06 2022-03-30 Dental piece, method for manufacturing same, and dental handpiece

Country Status (2)

Country Link
TW (1) TWI802364B (en)
WO (1) WO2023032337A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010104697A (en) * 2008-10-31 2010-05-13 Manii Kk Method of manufacturing medical ultrafine implement
JP2020081828A (en) * 2018-11-30 2020-06-04 計芳 鈴木 Reciprocative-driven root canal filling tool
JP2021029539A (en) * 2019-08-22 2021-03-01 マニー株式会社 Dental root canal treatment tool

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7284459B2 (en) * 2019-02-21 2023-05-31 計芳 鈴木 Vibrating cylinder of reciprocating motion generator for root canal treatment, reciprocating motion generator and cap provided with this vibrating cylinder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010104697A (en) * 2008-10-31 2010-05-13 Manii Kk Method of manufacturing medical ultrafine implement
JP2020081828A (en) * 2018-11-30 2020-06-04 計芳 鈴木 Reciprocative-driven root canal filling tool
JP2021029539A (en) * 2019-08-22 2021-03-01 マニー株式会社 Dental root canal treatment tool

Also Published As

Publication number Publication date
TWI802364B (en) 2023-05-11
TW202310807A (en) 2023-03-16

Similar Documents

Publication Publication Date Title
US5340310A (en) Dental prophy angle
US20050136375A1 (en) Method and apparatus to remove macro and micro debris from a root canal
KR101181590B1 (en) Cutting insert for a vibrating dental instrument
US20150374458A1 (en) Endodontic tool with rotational and axial reciprocation
CN102655819B (en) Ultrasonic cavitron operation tip
KR20080074912A (en) Device for preparing and filling a tooth endodontic cavity
WO2023032337A1 (en) Dental piece, method for manufacturing same, and dental handpiece
JPH02144051A (en) Dental equipment
US20210330425A1 (en) Endodontic handpiece systems and methods
US20040234924A1 (en) Waterguide design and method and tube assembly for use therewith
WO2023021783A1 (en) Dental handpiece
WO2022196783A1 (en) Dental handpiece
EP4186460A2 (en) Moving part of a tool for a medical treatment, tool and method for manufacturing the moving part
WO1994013220A1 (en) Endodontic apparatus for retrofill cavity preparation
EP4096565A1 (en) Tool for a medical treatment, tool tip, moving part and/or handpiece for such a tool and method for producing such a tool for a medical treatment
JP3235293U (en) File for root canal treatment and dental handpiece with it
JP2023067702A (en) Reamer used for dental handpiece, manufacturing method of reamer and dental handpiece including reamer
JPWO2020170999A1 (en) Needle root canal treatment tools and dental treatment tools
JP3652294B2 (en) Dental scaler handpiece
EP2598077B1 (en) Transducer activated tool with water conduit
WO2024083763A1 (en) A tip holder, a tool tip and a medical tool
JP2021137526A (en) File reciprocation generator and reciprocation generator with file
KR20180020900A (en) Tool-coupling device for a vibration transferring handpiece
JP2020010877A (en) Chip

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22863927

Country of ref document: EP

Kind code of ref document: A1