JP2008093080A - Nozzle of powder spray device for dental care - Google Patents
Nozzle of powder spray device for dental care Download PDFInfo
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Abstract
Description
本発明は、歯科分野における粉体噴射装置のノズルに関するものであり、歯牙の齲蝕部位の除去治療に使用する粉体噴出装置のノズルに関する。 The present invention relates to a nozzle of a powder injection device in the dental field, and relates to a nozzle of a powder injection device used for treatment for removing a carious part of a tooth.
研削用粉体と加圧気体の混合物を噴出する混合物噴出孔と液体を噴出する液体噴出孔を備えた粉体噴射装置のノズルは、前記混合物と前記液体を同時に噴射し、歯牙の齲蝕部位の除去治療に使用される。 A nozzle of a powder injection device provided with a mixture injection hole for injecting a mixture of grinding powder and pressurized gas and a liquid injection hole for injecting liquid simultaneously injects the mixture and the liquid, Used for removal treatment.
粉体噴射装置のノズルは、通常、混合物噴出孔に連接する混合物管路をノズル管の内部に収容し、混合物管路とノズル管との間に液体管路を形成し、液体管路先端の液体噴出孔を混合物噴出孔の周りに同心状に形成しており、混合物噴出孔の先端形状は、円柱管が一般的である。 In a nozzle of a powder injection device, usually, a mixture pipe connected to a mixture jet hole is accommodated inside the nozzle pipe, a liquid pipe is formed between the mixture pipe and the nozzle pipe, and a liquid pipe at the tip of the liquid pipe is formed. The liquid ejection holes are formed concentrically around the mixture ejection holes, and the tip shape of the mixture ejection holes is generally a cylindrical tube.
特開昭６０−２０７６６０では、圧縮空気と研磨剤の混合流を供給する内管と、加圧水を供給する外管を供えた、歯清浄装置用のハンドピースのノズルヘッドが紹介されている。
前記ノズルヘッドは、歯面に付着した汚れを清掃する装置に使用するものであり、圧縮空気と研磨剤の混合流が歯の表面に対して均一に噴射することを重視していた。
Japanese Patent Application Laid-Open No. 60-207660 introduces a nozzle head of a handpiece for a tooth cleaning device provided with an inner tube for supplying a mixed flow of compressed air and an abrasive and an outer tube for supplying pressurized water.
The nozzle head is used for an apparatus for cleaning dirt adhering to the tooth surface, and attaches importance to a uniform flow of compressed air and abrasive to the tooth surface.
特許第３５４１１６２号では、粉末と空気の混合物をノズルまで移送するための混合物移送路と、水をノズルまで移送するための移送路とを備え、前記混合物を前記水とともに歯牙に吹き付けることにより歯科治療を行う歯科用ハンドピースのノズルであって、該ノズルは、前記混合物と前記水とのためにそれぞれ通路と噴出孔とを各別に備え、前記混合物の通路には絞り込まれた縮径部が形成され、この縮径部から内径が扁平に拡大して混合物の噴出孔が形成された歯科用治療剤を噴射するためのノズルが紹介されている。
前述の特許は、ノズル先端の形状を扁平にすることにより、歯の隙間などに集中的に粉末と水の混合物を噴射することを可能にした歯間の清掃を目的にしたものであり、歯科治療の齲蝕部位の除去という分野においては、粉末が線状に噴出されるため不向きであった。
In Japanese Patent No. 3541162, there is provided a mixture transfer path for transferring a mixture of powder and air to a nozzle, and a transfer path for transferring water to the nozzle, and the dental treatment is performed by spraying the mixture together with the water on the teeth. A nozzle for a dental handpiece, wherein the nozzle is provided with a passage and an ejection hole for the mixture and the water, respectively, and a reduced diameter portion is formed in the passage of the mixture. In addition, a nozzle for injecting a dental treatment agent in which the inner diameter is flattened from the reduced diameter portion and a mixture ejection hole is formed is introduced.
The aforementioned patent aims to clean the teeth between the teeth by making the shape of the nozzle tip flat so that a mixture of powder and water can be sprayed intensively in the gaps between the teeth. In the field of treatment caries removal, the powder is unsuitable because it is ejected linearly.
歯科治療における粉体と気体の混合物を噴射する装置用のハンドピースのノズルに関する特許は、多数出願されているが、本発明のような、歯の齲蝕部位の不可視領域に粉体を吹き付けることを目的とした発明は存在していない。
歯牙の齲蝕部位の除去治療において、歯牙の齲蝕形状によっては、歯牙表面の齲蝕面積より内部齲蝕の方が大きい場合がある、
従来のノズルは、ノズル先端形状が円柱形状であり、粉体と液体の混合物はノズル先端の円柱軸方向に噴射されるため、歯牙の表層の健全なエナメル質裏側の不可視領域にある齲蝕を取り残す問題があった。
また、粉体にエナメル質より硬い素材であるアルミナなどを使用することにより、不可視領域の齲蝕の上部にある歯牙のエナメル質を含めて齲蝕部位を取り除くことが容易となるが、健全な歯牙を切削しなくてはならないという問題や、研削材料であるアルミナがノズル先端部を削るという問題があった。
In the removal treatment of the carious site of the tooth, depending on the caries shape of the tooth, the internal caries may be larger than the caries area of the tooth surface,
The conventional nozzle has a cylindrical shape at the tip of the nozzle, and a mixture of powder and liquid is injected in the direction of the cylindrical axis at the tip of the nozzle, leaving behind the caries in the invisible area behind the healthy enamel on the surface of the tooth. There was a problem.
In addition, by using alumina, which is a material harder than enamel, in the powder, it becomes easy to remove the caries, including the enamel of the teeth above the caries in the invisible region, but healthy teeth can be removed. There was a problem that it had to be cut, and there was a problem that the grinding material alumina cut the tip of the nozzle.
したがって、本発明の課題は、混合物の噴射方向を拡散することにより、従来の混合物を直線的に噴射するノズルでは切削が困難であった、歯牙における不可視領域の齲蝕に対して、除去を容易にする粉体噴射装置用ノズルを提供することである。 Accordingly, an object of the present invention is to easily remove the caries in the invisible region of the tooth, which is difficult to cut with a conventional nozzle that linearly sprays the mixture, by diffusing the injection direction of the mixture. It is to provide a nozzle for a powder injection device.
本発明は歯科治療で使用するための研削用粉体と加圧気体の混合物を供給する内管と、前記内管を覆うように液体を供給する外管を備え、前記混合物と液体を歯牙に吹き付けることにより歯牙の研削を行う粉体噴射装置のハンドピースのノズルにおいて、内管の先端部に内径を絞った細管部を有し、細管部から混合物噴出孔にかけて内管を広げた混合物拡散部を有することを特徴とする歯科治療用粉体噴射装置用ノズルである。 The present invention includes an inner tube that supplies a mixture of grinding powder and pressurized gas for use in dental treatment, and an outer tube that supplies a liquid so as to cover the inner tube, and the mixture and the liquid are applied to teeth. In the nozzle of the handpiece of the powder injection device that grinds teeth by spraying, a mixture diffusing section that has a narrow tube section with a narrowed inner diameter at the tip of the inner tube and that expands the inner tube from the narrow tube section to the mixture ejection hole It is a nozzle for powder treatment apparatus for dental treatment characterized by having.
本発明の歯科治療用粉体噴射用ノズルは、歯科治療で使用するための研削用粉体と加圧気体の混合物を供給する内管と、液体を供給する外管を備え、前記混合物と前記液体を歯牙に吹き付けることにより歯牙の研削を行う粉体噴射装置のハンドピース用のノズルヘッドにおいて、
ノズルは、該内管の先端部に内径を絞った細管部を有し、細管部から混合物噴出孔にかけて内管を広げた円錐形状の混合物拡散部を有し、前記内管を覆うように外管を設け、内管の外側と外管の内側からなる空間に液体を通すための通路を有することにより、従来の混合物を直線的に噴射するノズルでは切削が困難であった歯牙における不可視領域の齲蝕に対する除去が容易になる。
The powder injection nozzle for dental treatment of the present invention comprises an inner tube for supplying a mixture of powder for grinding and pressurized gas for use in dental treatment, and an outer tube for supplying a liquid. In a nozzle head for a handpiece of a powder injection device that grinds teeth by spraying liquid on the teeth,
The nozzle has a narrow tube portion with a narrowed inner diameter at the tip of the inner tube, and has a conical mixture diffusion portion in which the inner tube is widened from the narrow tube portion to the mixture ejection hole, and is arranged so as to cover the inner tube. By providing a tube and having a passage for allowing liquid to pass through the space formed by the outer side of the inner tube and the inner side of the outer tube, it is difficult to cut with a conventional nozzle that linearly sprays the mixture. Removal against caries becomes easy.
さらに詳細に説明すると、図４に記すように、齲蝕部位４１には可視領域齲蝕４２と不可視領域齲蝕４３がある。
従来の噴出孔が円柱形状のノズルでは、図５に記すように、ノズル先端からの研削用粉体の噴出方向５１はノズル先端の円柱軸方向に平行となるため、可視領域齲蝕の削除のみが容易であり、不可視領域齲蝕の除去はノズルを傾けて噴射しなければならなかった。さらに深い不可視領域齲蝕では、ノズルを傾けても除去が困難であった。
本発明の歯科治療用粉体噴射装置用ノズルは、図６に記すように、ノズル先端からの研削用粉体の噴射方向６１がノズル先端の軸方向に対し角度を持ち該軸の同心状に拡散するため、ノズルを傾けることなく不可視領域齲蝕の除去が容易となった。さらに深い不可視領域齲蝕に対しても、ノズルを傾けることにより除去できる。
More specifically, as shown in FIG. 4, the caries portion 41 includes a visible area caries 42 and an invisible area caries 43.
In a conventional nozzle having a cylindrical injection hole, as shown in FIG. 5, the ejection direction 51 of the grinding powder from the nozzle tip is parallel to the cylinder axis direction of the nozzle tip, so only the visible area caries is deleted. It was easy and removal of invisible area caries had to be sprayed with the nozzle tilted. In deeper invisible area caries, removal was difficult even if the nozzle was tilted.
As shown in FIG. 6, the nozzle for dental treatment powder injection device of the present invention is such that the injection direction 61 of the powder for grinding from the nozzle tip has an angle with respect to the axial direction of the nozzle tip and is concentric with the shaft. Due to the diffusion, the invisible area caries can be easily removed without tilting the nozzle. Even deeper invisible area caries can be removed by tilting the nozzle.
ノズルの先端部の内管の絞った細管部は、研削用粉体と加圧気体の混合物の通路であり、混合物の噴出速度は該通路の最小径と加圧気体の圧力および流量により決まる。
加圧気体の圧力および流量に過度の負担をかけないためには、ノズルの先端部の内管の絞った細管部の内径は、好ましくはφ０．３〜１．３ｍｍである。さらに好ましくはφ０．５〜０．９ｍｍである。
研削用粉体と加圧気体の混合物の詰まりをなくすため、細管部の長さは、好ましくは１０ｍｍ以下である。さらに好ましくは３ｍｍ以下である。
ノズルの外径を細くすることでは操作性が向上するため、ノズル先端部の混合物噴出孔の内径は、好ましくはφ０．５〜１．５ｍｍである。さらに好ましくはφ０．５〜１．０ｍｍである。
The narrow tube portion of the inner tube at the tip of the nozzle is a passage for the mixture of the powder for grinding and the pressurized gas, and the jetting speed of the mixture is determined by the minimum diameter of the passage and the pressure and flow rate of the pressurized gas.
In order not to place an excessive burden on the pressure and flow rate of the pressurized gas, the inner diameter of the narrow tube portion of the inner tube at the tip of the nozzle is preferably φ0.3 to 1.3 mm. More preferably, it is φ0.5-0.9 mm.
In order to eliminate clogging of the mixture of the grinding powder and the pressurized gas, the length of the narrow tube portion is preferably 10 mm or less. More preferably, it is 3 mm or less.
Since the operability is improved by reducing the outer diameter of the nozzle, the inner diameter of the mixture ejection hole at the tip of the nozzle is preferably φ0.5 to 1.5 mm. More preferably, it is φ0.5 to 1.0 mm.
ノズル先端の混合物拡散部の円錐形状の拡散角度は、好ましくは３〜５０度であり、さらに好ましくは５〜３０度である。 The cone-shaped diffusion angle of the mixture diffusing portion at the nozzle tip is preferably 3 to 50 degrees, and more preferably 5 to 30 degrees.
以下、本発明の実施形態を図例に基づいて詳細に説明するが、本発明はこれに限定されるものではない。
図１は本発明の歯科治療用粉体噴射装置用ノズルの断面図であり、図２は図１におけるA−A線に沿った断面図であり、図３は図１のノズルの端面図である。
Hereinafter, although an embodiment of the present invention is described in detail based on an example of the figure, the present invention is not limited to this.
FIG. 1 is a cross-sectional view of a nozzle for a powder injection device for dental treatment according to the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is an end view of the nozzle of FIG. is there.
このノズル１は、炭酸水素ナトリウムなどの研削用粉体と空気の混合物と液体を歯牙に吹き付けることにより歯牙の研削を行う粉体噴射装置のハンドピース用のノズルであり、ノズル１は内管３と外管２とから二重管に構成され、液体管路４と混合物管路５を有している。液体管路４は外管２の内側と内管３の外側から構成され、混合物管路５は内管３の内側である。 The nozzle 1 is a nozzle for a handpiece of a powder injection device that grinds teeth by spraying a mixture of powder for grinding such as sodium hydrogen carbonate and air and a liquid onto the teeth, and the nozzle 1 is an inner tube 3. The outer pipe 2 and the outer pipe 2 are formed into a double pipe, and have a liquid pipe line 4 and a mixture pipe line 5. The liquid pipe 4 is formed from the inside of the outer pipe 2 and the outside of the inner pipe 3, and the mixture pipe 5 is inside the inner pipe 3.
前述ノズル１の先端は、混合物の噴射方向を拡散するための先端部材９と該先端部材をノズル１に固定するための固定部材１０から構成されている。
先端部材９は中空構造で、先端に混合物噴出孔１１と内管接続部６を有し、内管接続部６は、内管３からの混合物の漏れを防ぐためのシールリング８を有し、ノズル１の内管３に接続される。
先端部材９は中空構造の一部に管を細めた部位である細管部１３を持ち、内管接続部６から細管部１３にかけて内径を細め、細管部１３から先端の混合物噴出孔１１に向けて内径が太くなり、混合物噴出孔１１は円錐形状となる。
固定部材１０は外管接続部７を有し、該固定部材を外管２に接続することにより、内管３に接続した先端部材９を押さえ込み、該先端部材が抜け落ちることを防ぐ。
The tip of the nozzle 1 is composed of a tip member 9 for diffusing the injection direction of the mixture and a fixing member 10 for fixing the tip member to the nozzle 1.
The tip member 9 has a hollow structure and has a mixture injection hole 11 and an inner pipe connection portion 6 at the tip, and the inner pipe connection portion 6 has a seal ring 8 for preventing leakage of the mixture from the inner tube 3; Connected to the inner tube 3 of the nozzle 1.
The tip member 9 has a narrow tube portion 13 which is a portion of the hollow structure where the tube is narrowed. The inner diameter is narrowed from the inner tube connecting portion 6 to the narrow tube portion 13, and the narrow tube portion 13 is directed toward the tip mixture ejection hole 11. The inner diameter becomes thicker, and the mixture ejection hole 11 has a conical shape.
The fixing member 10 has an outer pipe connecting portion 7, and by connecting the fixing member to the outer pipe 2, the front end member 9 connected to the inner pipe 3 is pressed down to prevent the front end member from falling off.
図２は図１におけるA−A線に沿った断面図であり、先端部材９の外面に図１と図２に示したように液体管路用溝１４を設け、この液体管路用溝と固定部材１０の内面とからなる空間が液体の通路となる。 FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1. A liquid conduit groove 14 is provided on the outer surface of the tip member 9 as shown in FIGS. A space formed by the inner surface of the fixing member 10 serves as a liquid passage.
次にノズル１の作用について説明する。
研削用粉体と加圧気体は混合物管路５を通り先端部材９の細管部１３に至り、該細管部から円錐状に形成された先端部材９の内側面に沿って流れ、混合物噴出孔１１から先端部材９の軸方向に対して拡散されて放出される。また、液体は液体管路４を通って流れ、先端部材９に設けられた液体管路用溝１４を通り液体噴出孔１２に至り、該液体噴出孔から放出された液体は混合物噴出孔１１から放出された混合物の気流により霧状になる。
混合物噴出孔１１から噴出した混合物と液体噴出孔１２から噴出した液体はノズル先端軸方向より同心円状に角度を持って拡散放出され、歯牙のう蝕部位の不可視領域に良好に吹き付けられ、う蝕部位の取り残しがない歯科治療が行われる。
Next, the operation of the nozzle 1 will be described.
The grinding powder and the pressurized gas pass through the mixture pipe 5, reach the narrow tube portion 13 of the tip member 9, flow along the inner surface of the tip member 9 formed in a conical shape from the narrow tube portion, and the mixture ejection hole 11. Are diffused and discharged from the axial direction of the tip member 9. Further, the liquid flows through the liquid conduit 4, passes through the liquid conduit groove 14 provided in the tip member 9, reaches the liquid ejection hole 12, and the liquid discharged from the liquid ejection hole passes through the mixture ejection hole 11. A mist is formed by the airflow of the discharged mixture.
The mixture ejected from the mixture ejection hole 11 and the liquid ejected from the liquid ejection hole 12 are diffused and discharged at an angle concentrically with respect to the nozzle tip axis direction, and are well sprayed on the invisible region of the dental caries portion, Dental treatment is performed without leaving any parts left.
本発明は、歯牙の齲蝕部位の削除治療に使用する歯科用粉体噴射装置のハンドピースに用いる。 INDUSTRIAL APPLICABILITY The present invention is used for a handpiece of a dental powder injection device used for removal treatment of a dental caries site.
１ ノズル
２ 外管
３ 内管
４ 液体管路
５ 混合物管路
６ 内管接続部
７ 外管接続部
８ シールリング
９ 先端部材
１０ 固定部材
１１ 混合物噴出孔
１２ 液体噴出孔
１３ 細管部
１４ 液体用管路
４１ 齲蝕部位
４２ 可視領域齲蝕
４３ 不可視領域齲蝕
５１ 噴射方向
６１ 噴射方向
DESCRIPTION OF SYMBOLS 1 Nozzle 2 Outer pipe 3 Inner pipe 4 Liquid pipe line 5 Mixture pipe line 6 Inner pipe connection part 7 Outer pipe connection part 8 Seal ring 9 Tip member 10 Fixing member 11 Mixture ejection hole 12 Liquid ejection hole 13 Narrow pipe part 14 Liquid pipe Road 41 Caries part 42 Visible area caries 43 Invisible area caries 51 Injection direction 61 Injection direction
Claims (1)
内管の先端部付近に内径を絞った細管部を有し、細管部から混合物噴出孔にかけて内管を広げた混合物拡散部を有することを特徴とする歯科治療用粉体噴射装置用ノズル。 An inner tube for supplying a mixture of grinding powder and pressurized gas for use in dental treatment, and an outer tube for supplying a liquid so as to cover the inner tube, and spraying the mixture and the liquid on a tooth In the powder injection device handpiece nozzle that grinds teeth,
A nozzle for a dental treatment powder injection apparatus, comprising: a narrow tube portion with a narrowed inner diameter near the tip of the inner tube; and a mixture diffusion portion in which the inner tube is expanded from the narrow tube portion to the mixture ejection hole.
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| JP2006276200A JP4653055B2 (en) | 2006-10-10 | 2006-10-10 | Nozzle for powder injection device for dental treatment |
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| JP2006276200A JP4653055B2 (en) | 2006-10-10 | 2006-10-10 | Nozzle for powder injection device for dental treatment |
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| US10098717B2 (en) | 2012-04-13 | 2018-10-16 | Sonendo, Inc. | Apparatus and methods for cleaning teeth and gingival pockets |
| US10363120B2 (en) | 2012-12-20 | 2019-07-30 | Sonendo, Inc. | Apparatus and methods for cleaning teeth and root canals |
| US10420630B2 (en) | 2009-11-13 | 2019-09-24 | Sonendo, Inc. | Liquid jet apparatus and methods for dental treatments |
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