JPH0564643A - Root canal operating apparatus - Google Patents
Root canal operating apparatusInfo
- Publication number
- JPH0564643A JPH0564643A JP3255731A JP25573191A JPH0564643A JP H0564643 A JPH0564643 A JP H0564643A JP 3255731 A JP3255731 A JP 3255731A JP 25573191 A JP25573191 A JP 25573191A JP H0564643 A JPH0564643 A JP H0564643A
- Authority
- JP
- Japan
- Prior art keywords
- reamer
- file
- root canal
- root
- needle
- 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.)
- Granted
Links
- 210000004262 dental pulp cavity Anatomy 0.000 title claims abstract description 56
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 210000004195 gingiva Anatomy 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 210000001519 tissue Anatomy 0.000 description 2
- 241000282465 Canis Species 0.000 description 1
- 210000004763 bicuspid Anatomy 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 210000004283 incisor Anatomy 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 210000002200 mouth mucosa Anatomy 0.000 description 1
- 210000004053 periapical tissue Anatomy 0.000 description 1
- 230000003239 periodontal effect Effects 0.000 description 1
- 238000010837 poor prognosis Methods 0.000 description 1
- 239000002631 root canal filling material Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C19/00—Dental auxiliary appliances
- A61C19/04—Measuring instruments specially adapted for dentistry
- A61C19/042—Measuring instruments specially adapted for dentistry for determining the position of a root apex
Landscapes
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
Description
【０００１】[0001]
【技術分野】本発明は、歯科治療における根管拡大等の
施術に用いる根管施術装置に関する。TECHNICAL FIELD The present invention relates to a root canal operating device used for operations such as root canal expansion in dental treatment.
【０００２】[0002]
【従来技術】歯内療法における根管治療の困難さは、根
尖周囲組織を傷つけずに根尖まで確実に根管の拡大、清
掃を行い、これを緊密に充填する点にある。治療中に根
尖位置を越えてリーマ、ファイル、ブローチ、根管充填
材料等で根尖周囲組織を刺激することは好ましくなく、
このため、根尖歯周組織の刺激を恐れて、器具の挿入が
不十分となったり、根尖部根管に清掃消毒されない空隙
を残すことは予後を不良にする原因となる。したがっ
て、根管治療を正しく行うためには、予め根管の正確な
長さを知っておく必要がある。これまで、臨床において
根管長を知る方法として、測定針（通常、リーマまたは
ファイル）を根管に挿入し、術者の手指の感覚によって
根尖位置を知る方法が知られている。しかし、この方法
によると、上顎切歯、犬歯、下顎小臼歯等のように単純
で太い根管で、しかも根尖が完成していて、根尖狭窄部
が明らかに触知できる症例ではほぼ触知できるが、細
く、根尖未完成歯や彎曲した根管では熟練者でも確認が
難しいという問題点がある。そのために根管長を電気的
に測定するものとして、特公昭６２−２１８７号公報に
記載されているように、根管内に、リーマ又はファイル
を測定針として挿入し、口腔粘膜に当接した片電極との
間に、例えば、１ＫＨz2と５ＫＨz2の２つの周波数の交
流電圧を加え、根管長を検出するものが提案されてい
る。2. Description of the Related Art The difficulty of root canal treatment in endodontic treatment lies in the fact that the root canal is surely expanded and cleaned up to the apex without damaging the tissue around the apex, and the root canal is closely packed. It is not preferable to stimulate the periapical tissue with a reamer, a file, a broach, a root canal filling material, etc. beyond the apex position during treatment.
For this reason, the fear of irritation of the apical periodontal tissue may result in insufficient insertion of the instrument or leaving a void in the apical root canal that is not cleaned and sterilized, resulting in a poor prognosis. Therefore, in order to perform the root canal treatment correctly, it is necessary to know the exact length of the root canal in advance. As a method of clinically knowing the root canal length, there has been known a method of inserting a measuring needle (usually a reamer or file) into the root canal and knowing the apex position by the sense of the operator's fingers. However, according to this method, in cases in which the root apex is completed with a simple and thick root canal such as the upper incisor, canine, lower bicuspid, etc. Although it can be known, there is a problem that it is difficult for even an expert to confirm with thin, uncompleted root apical teeth and curved root canals. Therefore, as electrically measuring the root canal length, as described in Japanese Patent Publication No. Sho 62-2187, a reamer or a file is inserted as a measuring needle into the root canal and abutted against the oral mucosa. between the strip electrodes, for example, the two AC voltage of a frequency of 1 KHz 2 and 5 KHz 2 addition, to detect a root canal length have been proposed.
【０００３】図３は、手用のリーマ又はファイルを用い
て根管長を電気的に測定する一例を説明するための図
で、図中、１０はリーマ又はファイルホルダー、２０は
リーマ又はファイル、３０は歯牙、３１は根管、３２は
歯肉で、周知のように、リーマ又はファイル２０は、導
電性の針部材２１、刃部２２、ラバーストッパー２３、
把持部２４等から成り、該手用のリーマ又はファイルを
用いて根管長を測定する場合、ラバーストッパー２３と
把持部２４の間をホルダー１０の電極部１１で保持し、
この電極部１１を電気的根管長測定の際の一方の電気信
号取り出し部とし、歯肉３２側の電極１２を他方の電極
としている。この電気的な根管長の測定により根管長が
出たら、その根管長に合せてラバーストッパー２３を移
動させている。FIG. 3 is a view for explaining an example of electrically measuring the root canal length using a manual reamer or file. In the figure, 10 is a reamer or file holder, 20 is a reamer or file, 30 is a tooth, 31 is a root canal, and 32 is a gingiva. As is well known, the reamer or file 20 has a conductive needle member 21, a blade portion 22, a rubber stopper 23,
When measuring the root canal length using a reamer or file for the hand, which is composed of the gripping part 24, etc., the electrode part 11 of the holder 10 holds the space between the rubber stopper 23 and the gripping part 24,
This electrode portion 11 is used as one electric signal extraction portion when measuring the electric root canal length, and the electrode 12 on the side of the gingiva 32 is used as the other electrode. When the root canal length is obtained by this electrical measurement of the root canal length, the rubber stopper 23 is moved according to the root canal length.
【０００４】而して、上記従来の根管の施術は、根管長
の測定と根管の拡大とを手用のリーマ又はファイルを用
いて行うものであり、上述のように、ラバーストッパー
を移動させて根管長をリーマに移していても、作業性に
それ程問題はない。しかし、前述のリーマ又はファイル
を超音波振動子やマイクロエンジン等の動力を用いて駆
動する場合、リーマ又はファイルをこれらのヘッドに取
り付けた状態で根管長を測定しなければならず、また、
測定時にストッパーの位置を移動させたりすることは非
常に不便であり、非能率である。In the above conventional root canal treatment, the root canal length is measured and the root canal is enlarged by using a manual reamer or file. Even if the root canal is moved to the reamer, the workability is not so problematic. However, when driving the above-mentioned reamer or file using power such as an ultrasonic oscillator or a micro engine, the root canal length must be measured with the reamer or file attached to these heads.
It is very inconvenient and inefficient to move the position of the stopper during measurement.
【０００５】そこで、本出願人は、先に、超音波振動
子、マイクロエンジン等のヘッド部に装着されたリーマ
又はファイルを根管長測定針として使用する場合におけ
る電気信号の取り出し方について提案した。図４は、本
出願人が先に提案した根管長測定用電極の一使用例を示
す図で、図中、４１は超音波振動子、マイクロエンジン
等のハンドピース部、４２はグリップ部、４３はヘッド
部、４４はヘッドケース部、４５はリーマ又はファイル
等の切削具兼根管長測定針で、周知のように、該リーマ
又はファイルをヘッド部４３に装着し、超音波振動子又
はマイクロエンジンを駆動して根管の拡大、清掃を行う
が、その前に、前述のように、根管の長さを正確に測定
する必要がある。その測定法の１つは前述のごとき電気
的に測定する方法であるが、図４に示したように、ハン
ドピースのヘッド部４３に装着したリーマ又はファイル
４５を利用して行う場合には、ヘッド部４３、ヘッドケ
ース部４４、グリップ部４２等が邪魔となり測定用の電
極をリーマ又はファイルに取り付ける作業がしにくく、
作業性が非常に悪い。Therefore, the present applicant has previously proposed a method of extracting an electric signal when a reamer or a file mounted on the head portion of an ultrasonic transducer, a micro engine or the like is used as a root canal length measuring needle. .. FIG. 4 is a view showing an example of use of a root canal length measuring electrode previously proposed by the present applicant, in which 41 is an ultrasonic transducer, a hand piece part such as a micro engine, 42 is a grip part, 43 is a head part, 44 is a head case part, 45 is a cutting tool and root canal length measuring needle such as a reamer or a file. As is well known, the reamer or file is attached to the head part 43 and an ultrasonic transducer or Although the root canal is enlarged and cleaned by driving the micro engine, the length of the root canal must be accurately measured as described above. One of the measuring methods is an electric measuring method as described above. However, as shown in FIG. 4, when the reamer or the file 45 attached to the head portion 43 of the handpiece is used, The head part 43, the head case part 44, the grip part 42, etc. are an obstacle and it is difficult to attach the measurement electrode to the reamer or the file.
Workability is very poor.
【０００６】そこで、本出願人は、先に、図４に示すよ
うに、ヘッドケース部４４に電極５０を着脱自在に装着
できるようにした。この電極５０は、絶縁性の環状部材
５１と該環状部材５１に一体的に取り付けられた電極５
２とから成り、環状部材５１の中空部をヘッドケース部
４４に挿入して回動すると、該環状部材５１に一体的に
取り付けられた電極５２の電極針部５２ａ（つまりヘッ
ド部４３の下側において環状部材５１から延長している
電極針部５２ａ）がリーマ又はファイル４５に当接す
る。電極５２の他方の端部５２ｂは環状部材５１の外側
に露出しており、この露出している端部５２ｂにリード
線５５を接続する。リード線５５の図示しない端部は、
当然に、図示しない根管長測定器に導かれ、リーマ又は
ファイル４５の先端が根尖位置に達した時に、リーマ又
はファイルの先端が根尖位置に達したことを知らせる。Therefore, the present applicant previously made it possible to detachably mount the electrode 50 on the head case portion 44, as shown in FIG. The electrode 50 includes an insulating annular member 51 and an electrode 5 integrally attached to the annular member 51.
When the hollow portion of the annular member 51 is inserted into the head case portion 44 and rotated, the electrode needle portion 52a of the electrode 52 integrally attached to the annular member 51 (that is, the lower side of the head portion 43). At, the electrode needle portion 52a) extending from the annular member 51 abuts the reamer or file 45. The other end portion 52b of the electrode 52 is exposed outside the annular member 51, and the lead wire 55 is connected to the exposed end portion 52b. The end (not shown) of the lead wire 55 is
As a matter of course, when the tip of the reamer or file 45 reaches the apex position by being guided to a root canal length measuring device (not shown), the tip of the reamer or file reaches the apex position.
【０００７】図５は、上述のごとき超音波振動子、マイ
クロエンジン等を用いて根管の施術を行う場合の一例を
説明するための図で、前述のようにして検出された根尖
位置は、リード線５５を通して根管長検出器６０に導か
れ、該検出器の表示部に表示される。図５（ａ）は、リ
ーマ又はファイル４５の挿入深さと出力電圧との関係を
示す図、（ｂ）は前記検出器の表示部を示す図で、周知
のように、リーマ又はファイル４５の先端が根尖位置に
達すると、該リーマ又はファイルを通して流れる電流が
所定の一定値となり、検出器の指示針６１がＡＰＥＸ位
置を指示し、リーマ又はファイルの先端が根尖位置に達
したことが分かる。従って、術者は、ここで超音波振動
子又はマイクロエンジンの駆動を停止し、リーマ又はフ
ァイルを根尖位置より戻して再度リーマ又はファイルを
駆動して施術を続行する。しかし、この場合、リーマ又
はファイルの先端が根尖位置に達してから該リーマ又は
ファイルを停止するようにしたので、リーマ又はファイ
ルの先端が根尖位置を越してしまい危険である。そのた
め、術者によっては、リーマ又はファイルの先端が根尖
位置に達っする少し前で、例えば、０.５〜１mm手前で
これらリーマ又はファイルの駆動を停止したい。そのよ
うな場合には、根管長検出器の指示針６１がＡＰＥＸよ
り少し前の時にリーマ又はファイルの駆動を停止するよ
うに設定するとよく、このようにすると、リーマ又はフ
ァイルの先端が根尖位置に達っする少し前で該リーマ又
はファイルの駆動を停止することができる。しかし、リ
ーマ又はファイルが停止した後、該リーマ又はファイル
を少し戻すと、すぐに、これらリーマ又はファイルが駆
動されたのでは、リーマ又はファイルの駆動停止が頻繁
に行なわれ、施術作業が非常にしにくい。FIG. 5 is a diagram for explaining an example of a case of performing a root canal treatment using the above-mentioned ultrasonic transducer, micro engine, etc., and the apex position detected as described above is , Is led to the root canal length detector 60 through the lead wire 55 and displayed on the display section of the detector. FIG. 5A is a diagram showing the relationship between the insertion depth of the reamer or file 45 and the output voltage, and FIG. 5B is a diagram showing the display portion of the detector. As is well known, the tip of the reamer or file 45 is shown. When the reamer reaches the apex position, the current flowing through the reamer or the file reaches a predetermined constant value, the indicator needle 61 of the detector indicates the APEX position, and it can be seen that the tip of the reamer or the file reaches the apex position. .. Therefore, the operator stops driving the ultrasonic transducer or the micro engine, returns the reamer or file from the apex position, drives the reamer or file again, and continues the operation. However, in this case, since the reamer or the file is stopped after the tip of the reamer or the file reaches the apex position, it is dangerous that the tip of the reamer or the file exceeds the apex position. Therefore, depending on the operator, it is desirable to stop the driving of the reamer or file just before the tip of the reamer or file reaches the apex position, for example, 0.5 to 1 mm before. In such a case, it may be set so that the drive of the reamer or the file is stopped when the indicator needle 61 of the root canal length detector is slightly before APEX. The drive of the reamer or file can be stopped shortly before reaching the position. However, as soon as the reamer or file is returned a little after the reamer or file is stopped, the reamer or file is driven immediately, so that the reamer or file is frequently stopped and the operation work becomes very difficult. Hateful.
【０００８】[0008]
【目的】本発明は、上述のごとき実情に鑑みてなされた
もので、特に、超音波振動子やマイクロエンジンを用い
て根管の拡大作業等を行う場合において、これらリーマ
やファイルの駆動、停止を使い勝手のよいように行い得
るようにすることを目的としてなされたものである。[Purpose] The present invention has been made in view of the above-mentioned circumstances, and particularly, in the case of expanding a root canal using an ultrasonic transducer or a micro engine, driving or stopping of these reamers and files. The purpose is to make it easier to use.
【０００９】[0009]
【構成】本発明は、上記目的を達成するために、ヘッド
に装着されたリーマ又はファイル等の切削針を根管長検
出電極針として使用し、該検出電極針が根尖位置又は根
尖位置より手前の設定位置に達した時に前記切削針の駆
動を停止し、前記根尖位置又は設定位置から所定距離後
退した時に再度駆動されるようにしたことを特徴とした
ものである。以下、本発明の実施例に基いて説明する。In order to achieve the above object, the present invention uses a cutting needle such as a reamer or a file mounted on a head as a root canal length detecting electrode needle, and the detecting electrode needle is located at the apex position or the apex position. The driving of the cutting needle is stopped when it reaches a set position closer to the front, and the cutting needle is driven again when it is retracted a predetermined distance from the apex position or the set position. Hereinafter, it demonstrates based on the Example of this invention.
【００１０】図１は、本発明による根管施術装置の一実
施例を説明するための構成図で、図２は、その動作説明
をするための電気信号波形図で、図中、図３、図４に示
した例と同様の作用をする部分には、図３、図４の場合
と同一の参照番号が付してある。而して、根管長検出器
６０は前述のようにして、電気５５，１２間を流れる電
流を検出して根尖位置を検出するが、該検出器６０の指
示針６１が前述のようにして根尖位置又は設定位置に達
すると、例えば、トランジスタ１が導通し、発光ダイオ
ードが発光してホトカップラー２が作動し、リレー３が
作動する。このリレー３が作動すると、その接点４が開
放し、超音波振動子又はマイクロエンジンの駆動部５の
駆動が停止される。従って、ここで、リーマ又はファイ
ル４５を少し戻せば、リレー３が消勢されてリレー接点
４が閉勢され、駆動部５が再度駆動されて施術が可能と
なる。しかし、この場合、リーマ又はファイル４５を少
し戻せば、すぐ、駆動部５が駆動されたのでは、施術が
非常にやりにくい。FIG. 1 is a block diagram for explaining an embodiment of a root canal treatment device according to the present invention, and FIG. 2 is an electric signal waveform diagram for explaining its operation. The same reference numerals as those in FIGS. 3 and 4 are attached to the portions having the same functions as those in the example shown in FIG. Thus, the root canal length detector 60 detects the current flowing between the electricity 55 and 12 to detect the root apex position as described above, and the indicator needle 61 of the detector 60 operates as described above. When the root apex position or the set position is reached, for example, the transistor 1 becomes conductive, the light emitting diode emits light, the photocoupler 2 operates, and the relay 3 operates. When this relay 3 is activated, its contact 4 is opened, and the drive of the ultrasonic vibrator or the drive unit 5 of the micro engine is stopped. Therefore, if the reamer or the file 45 is slightly returned here, the relay 3 is de-energized, the relay contact 4 is closed, and the drive unit 5 is re-driven to enable the treatment. However, in this case, if the drive unit 5 is driven immediately after the reamer or the file 45 is returned a little, it is very difficult to perform the treatment.
【００１１】そこで、本発明においては、図２（ａ）に
示すように、リーマ又はファイル４５の先端が根尖位置
又は設定位置Ａに達した時は、前記リーマ又はファイル
４５を直ちに停止するが、該リーマ又はファイル４５を
少し戻しただけではこれらの駆動部５が直ちに駆動され
ないようにし、つまり、図２（ｂ）に示すように、Ａ点
から少し戻ったＢ点では駆動されず、Ｃ点まで戻った時
に、はじめて再度駆動されるようになっている。すなわ
ち、図２（ａ）において、Ｄ区間はヒステリシス特性を
もつ区間であり、これにより、リーマ又はファイル４５
の駆動が停止された後、これらリーマ又はファイル４５
を所定距離（Ｃ点まで）戻さなければ、これらリーマ又
はファイル４５を再度駆動することができず、これによ
って、作業性、使い勝手を非常に良いものとしている。Therefore, in the present invention, as shown in FIG. 2A, when the tip of the reamer or file 45 reaches the apex position or the set position A, the reamer or file 45 is immediately stopped. , A slight return of the reamer or file 45 prevents these drive units 5 from being driven immediately, that is, as shown in FIG. 2 (b), it is not driven at point B slightly returned from point A, and C When it returns to the point, it will be driven again for the first time. That is, in FIG. 2A, the D section is a section having a hysteresis characteristic, which allows the reamer or the file 45 to be stored.
After the drive of the reamer is stopped, these reamers or files 45
The reamer or the file 45 cannot be driven again unless is returned by a predetermined distance (to the point C), which makes the workability and usability very good.
【００１２】[0012]
【効果】以上の説明から明らかなように、本発明による
と、超音波振動子やマイクロエンジン等の駆動力を用い
た根管施術装置において、これらリーマやファイルの先
端が根尖位置を超えるようなことはなく、根尖位置又は
設定位置に達した後は、所定距離戻さなければ、再度駆
動することができないので、安全で、しかも、非常に使
い勝手のよい根管施術装置を提供することができる。[Effect] As is apparent from the above description, according to the present invention, in a root canal treatment device that uses a driving force such as an ultrasonic transducer or a micro engine, the tip of the reamer or file may exceed the apex position. However, once the root apex position or the set position is reached, it cannot be driven again unless it is returned by a predetermined distance, so a safe and extremely easy-to-use root canal treatment device can be provided. it can.
【図１】 本発明による根管施術装置の一実施例を説明
するための要部構成図である。FIG. 1 is a main part configuration diagram for explaining an embodiment of a root canal treatment device according to the present invention.
【図２】 本発明による根管施術装置の動作説明をする
ための図である。FIG. 2 is a view for explaining the operation of the root canal treatment device according to the present invention.
【図３】 従来の手用根管長測定法の一例を説明するた
めの図である。FIG. 3 is a diagram for explaining an example of a conventional method for measuring a root canal length for a hand.
【図４】 本出願人が先に提案した根管長測定法の一例
を説明するための図である。FIG. 4 is a diagram for explaining an example of a root canal length measuring method previously proposed by the applicant.
【図５】 図４に示した根管長測定装置を用いて根管施
術を行う場合の一例を説明するための図である。5 is a diagram for explaining an example of a case where a root canal treatment is performed using the root canal length measuring device shown in FIG.
１…リーマ又はファイル先端検出トランジスタ、２…ホ
トカップラー、３…リレー、４…リレー接点、５…リー
マ又はファイル駆動部、３０…歯牙、３１…根管、４１
…ハンドピース、４５…リーマ又はファイル、６０…根
管長測定器。DESCRIPTION OF SYMBOLS 1 ... Reamer or file tip detection transistor, 2 ... Photocoupler, 3 ... Relay, 4 ... Relay contact, 5 ... Reamer or file drive part, 30 ... Tooth, 31 ... Root canal, 41
... Handpiece, 45 ... Reamer or file, 60 ... Root canal length measuring instrument.
Claims (1)
等の切削針を根管長検出電極針として使用し、該検出電
極針が根尖位置又は根尖位置より手前の設定位置に達し
た時に前記切削針の駆動を停止し、前記根尖位置又は設
定位置から所定距離後退した時に再度駆動されるように
したことを特徴とする根管施術装置。1. A cutting needle such as a reamer or file attached to a head is used as a root canal length detecting electrode needle, and when the detecting electrode needle reaches a root apex position or a set position before the root apex position, A root canal treatment device characterized in that the driving of the cutting needle is stopped, and the cutting needle is driven again when it is retracted a predetermined distance from the apex position or the set position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3255731A JP2857514B2 (en) | 1991-09-06 | 1991-09-06 | Root canal treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3255731A JP2857514B2 (en) | 1991-09-06 | 1991-09-06 | Root canal treatment device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0564643A true JPH0564643A (en) | 1993-03-19 |
| JP2857514B2 JP2857514B2 (en) | 1999-02-17 |
Family
ID=17282852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3255731A Expired - Lifetime JP2857514B2 (en) | 1991-09-06 | 1991-09-06 | Root canal treatment device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2857514B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5897315A (en) * | 1996-02-22 | 1999-04-27 | Kabushiki Kaisha Morita Seisakusho | Handpiece having a root canal length measurement function |
| US5980248A (en) * | 1995-07-28 | 1999-11-09 | Kabushiki Kaisha Morita Seisakusho | Motor controller for a dental handpiece |
| DE19549662C2 (en) * | 1994-06-09 | 2002-11-14 | Morita Seisakusho Kyoto Kk | Dental treatment unit with root chord length measuring operation |
| DE19520765B4 (en) * | 1994-06-09 | 2004-07-08 | Kabushiki Kaisha Morita Seisakusho | Dental treatment facility with root canal length measurement function |
| WO2006124247A1 (en) * | 2005-05-12 | 2006-11-23 | Pro-Dex, Inc. | Dental handpiece with removable apex finding electrode |
| EP1839619A1 (en) * | 2006-03-31 | 2007-10-03 | CASTELLINI S.p.A. | A dental unit. |
| JP2009518085A (en) * | 2005-12-05 | 2009-05-07 | ビエン−エアー ホールディング エスアー | Accessories for tip position detector |
| WO2016024722A1 (en) * | 2014-08-11 | 2016-02-18 | 주식회사 올비트앤 | Tooth endodontic treatment instrument having endodontic insertion depth sensing function |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6422320U (en) * | 1987-07-30 | 1989-02-06 | ||
| JPH0298913U (en) * | 1989-01-23 | 1990-08-07 |
-
1991
- 1991-09-06 JP JP3255731A patent/JP2857514B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6422320U (en) * | 1987-07-30 | 1989-02-06 | ||
| JPH0298913U (en) * | 1989-01-23 | 1990-08-07 |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19549662C2 (en) * | 1994-06-09 | 2002-11-14 | Morita Seisakusho Kyoto Kk | Dental treatment unit with root chord length measuring operation |
| DE19520765B4 (en) * | 1994-06-09 | 2004-07-08 | Kabushiki Kaisha Morita Seisakusho | Dental treatment facility with root canal length measurement function |
| US5980248A (en) * | 1995-07-28 | 1999-11-09 | Kabushiki Kaisha Morita Seisakusho | Motor controller for a dental handpiece |
| US5897315A (en) * | 1996-02-22 | 1999-04-27 | Kabushiki Kaisha Morita Seisakusho | Handpiece having a root canal length measurement function |
| CN1094750C (en) * | 1996-02-22 | 2002-11-27 | 株式会社森田制作所 | Handpiece having root canal length measurement function |
| WO2006124247A1 (en) * | 2005-05-12 | 2006-11-23 | Pro-Dex, Inc. | Dental handpiece with removable apex finding electrode |
| US7476101B2 (en) | 2005-05-12 | 2009-01-13 | Pro-Dex, Inc. | Dental handpiece with removable apex finding electrode |
| JP2009518085A (en) * | 2005-12-05 | 2009-05-07 | ビエン−エアー ホールディング エスアー | Accessories for tip position detector |
| EP1839619A1 (en) * | 2006-03-31 | 2007-10-03 | CASTELLINI S.p.A. | A dental unit. |
| WO2016024722A1 (en) * | 2014-08-11 | 2016-02-18 | 주식회사 올비트앤 | Tooth endodontic treatment instrument having endodontic insertion depth sensing function |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2857514B2 (en) | 1999-02-17 |
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