WO2006027097A2 - Kanüle zum spülen eines zahnwurzelkanales sowie spülgerät mit einer solchen - Google Patents
Kanüle zum spülen eines zahnwurzelkanales sowie spülgerät mit einer solchen Download PDFInfo
- Publication number
- WO2006027097A2 WO2006027097A2 PCT/EP2005/009015 EP2005009015W WO2006027097A2 WO 2006027097 A2 WO2006027097 A2 WO 2006027097A2 EP 2005009015 W EP2005009015 W EP 2005009015W WO 2006027097 A2 WO2006027097 A2 WO 2006027097A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cannula
- tube
- root canal
- treatment fluid
- diameter
- Prior art date
Links
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
Definitions
- the invention relates to a cannula for rinsing a tooth root canal and a dental root canal irrigation device working with such a cannula.
- treatment liquids include disinfectants as well as tissue dissolving agents such as NaOCl.
- customary cannulas are used for cleaning tooth root canals, the wall of which is continuous as far as the tip of the cannula, or if the tip of the cannula has only a small lateral window, then it can happen that the treatment liquid is applied in the cannula build up a high pressure. Because of this high pressure, it is then not ruled out in the case of very deep tooth root canals that only a thin tissue web to the interior of the jaw is broken through the treatment fluid under high pressure and treatment liquid reaches the interior of the jaw. As a result, the jaw is sustainably damaged.
- the present invention is therefore intended to specify a cannula for rinsing a tooth root canal, the use of which reduces the risk of high pressure build-up inside the cannula.
- the end portion of the cannula tube opened by the long axial window thus acts as a groove which guides the jet of treatment fluid to the channel end, but not as a pressure-resistant tube.
- the development of the invention according to claim 2 is in view of a smooth guidance of the treatment fluid to the lowest point of the tooth root canal advantage.
- the displacing cross section of the material of the cannula tube at the free end is reduced by the measure specified in claim 2, so that it can be inserted well into the tip of the tooth root canal without applying greater force.
- An axial extent of the provided in the cannula tube window, as indicated in claim 3, has proven particularly useful in practice. It avoids so safely building high pressures in the cannula tube and yet at the same time ensures that the treatment liquid is still carried to the end of the tooth root canal. Needles having the dimensions of the window specified in claim 3 can be used to rinse the root canal of most patients in a standard size use.
- a window which lies in a plane spaced from the axis of the cannula tube, as indicated in claim 5, can be produced in a particularly simple manner by grinding a cannula tube.
- Diameter of the cannula tube are on the other hand with regard to sufficient mechanical stability when rinsing on the one hand and flexibility of the cannula, as ge wished for ergonomic working, on the other hand advantageous.
- the wall thicknesses indicated in claim 7 are preferred for the cannula tube.
- Needles according to claim 8 are characterized by good flexibility and at the same time good stability under the forces acting on them during rinsing.
- the complementary coupling piece which cooperates with the cannula fitting, larger size than couplings, as they are used with conventional cannulas.
- standard cannulas which might be preferred by users for cost reasons, would bring The initially described danger with it that in the cannula tube, a high pressure builds up and specialistssflüs ⁇ fluid is pressed into the jaw's interior.
- the development of the invention according to claim 13 makes it possible to remove treatment fluid leaving the tooth root canal, which is retained by the splash protection part, controlled continuously remove.
- the development of the invention according to claim 14 is in view of easy handling of the device formed by splash guard and suction hose remindsaug ⁇ for spent treatment fluid advantage.
- a splash guard according to claim 15 is particularly well suited for use with circular cross-section suction hoses.
- a larger volume is sucked back from the tooth root canal than corresponds to the volume of the cannula tube.
- treatment fluid is also sucked back from the tooth root canal itself, and air fractions are still added to this treatment fluid.
- the mixture of air and treatment liquid to form a foam-like treatment fluid gives better utilization of the treatment fluid on the one hand, but also better wetting of the tooth root canal surface on the other hand.
- the desired high flow velocities in the sewer pipe are obtained particularly well if the times specified in claim 18 for the delivery of treatment fluid from the buffer space of the flushing device are met.
- FIG. 1 shows the end section of a root canal flushing device with attached flushing cannula, a splash protection part and a suction hose for used treatment fluid, a unit for the intermittent provision and return of treatment fluid being illustrated schematically as a block diagram;
- Figure 2 An enlarged perspective view of a
- Figure 3 A perspective view of the unit formed by cannula and splash guard obliquely from above;
- Figure 4 A side view of the unit formed by cannula and splash guard;
- Figure 5 An enlarged perspective view of a
- FIG. 6 An axial section through the splash guard of Figure 4.
- FIG. 7 A perspective view of the splash guard part seen obliquely from below.
- FIG. 1 shows at 10 the treatment-side end section of a tooth root canal rinsing device designated overall by 12.
- the end portion 10 has a coupling stub 14 which cooperates with a coupling bore 16 which cooperates in a fitting 18 of a generally designated 20 cannula to form a fluid connector.
- a mixing chamber 22 is formed, which is connected via a check valve 24 to the delivery side of a feed pump 26. The latter sucks via a second check valve 28 from a reservoir 30, in which a volume of a treatment liquid 32 is located, which z. B. may be a NaOCl solution or a disinfectant.
- the feed pump 26 is reciprocated by a motor 34, which may be a pneumatic motor or an electric motor, and in turn is controlled by a control unit 36.
- the coupling socket 14 is connected via a line 38 to a pump 40, which is driven by a motor 42, which again may be a pneumatic motor or an electric motor and is likewise controlled by the control unit 36.
- the components 24 to 42 described above form a supply unit, designated overall by 44.
- the cannula tube 46 which is supplied by the factory in a straight geometry and bent by the dentist in the geometry required in each case.
- the cannula tube 46 is shown bent by 90 and is inserted into a prepared tooth root canal, which in a tooth 48 is formed.
- the angled portion of the cannula tube 46 is passed through a central cannula opening 50 (see Figure 3) of a splash guard 52.
- the top of the splash guard 52 is substantially conical, wherein the opening angle of the cone is about 120 °, as shown in Figure 4 can be seen.
- the splash guard 52 has an outer peripheral wall 54 formed on the outer edge of the cone wall.
- Another part-cylindrical wall 56 of the splash guard part 52 defines a circular edge recess 58, which can receive a suction hose 60 under working conditions, as shown in FIG.
- a further part-cylindrical wall 62 extending in the circumferential direction is provided.
- the free edges of the walls 54, 56 and 62 lie in a common plane, as Figure 4 shows.
- the cannula opening 54 has a flared upper opening portion 64 which facilitates insertion of the cannula end.
- the splash guard part 52 has such a large diameter that it projects radially beyond a large molar.
- the splash guard 52 may equally be attached to larger and smaller diameter teeth. In practice, its diameter is about 8 to 12 mm, preferably 9 to 11 mm.
- the splash guard 52 is a one-piece plastic Injection part, which may be a disposable part, or may be an autoclavable reusable part.
- the cannula tube 46 at its free end has a long axial window 66 which has been obtained by transverse planar grinding of material.
- the edge of the window lies in a plane which is upwardly spaced from the axis of the cannula tube 46.
- the cannula tube has a diameter of 0.45 mm with a wall thickness of 0.1 mm.
- the material from which the cannula tube 46 is made is a 1.4301 steel material.
- the distance of the window plane of the cannula tube axis is about 0.05 mm, resulting in an opening angle of the window relative to the cannula tube axis of about 175 °.
- the axial dimension of the window 66 is 7 mm in a practical embodiment. Reductions of down to 5mm and up to 9mm are also well suited for specific tooth root canal lengths.
- the window 66 has a larger axial dimension, ensures that no appreciable pressure can build up inside the cannula tube 46, even if the cannula tube 46 is inserted into a narrow tooth root canal. Although the cannula tube 46 is thus laterally open over a greater distance, the treatment fluid supplied through the cannula tube 46 will certainly also reach the end of the tooth root canal, since it will open the tube section at a greater speed crosses.
- the connecting piece 18 of the cannula 20 is again a plastic injection-molded part, in which the supply-side end of the cannula tube 46 is embedded during injection.
- the coupling bore 16 is larger than in the case of the standard cannulas, which are used in conjunction with disposable syringes. Accordingly, the coupling piece 14 has larger diameter. Thus, no standard cannulas can be plugged onto the coupling socket 14. This is important because such cannulas, if introduced into a narrow dental root canal, would tend to become blocked, resulting in the initially described danger of high pressure build-up inside the cannula and penetration of the treatment medium into the interior of the jaw.
- the treatment device described above operates as follows:
- the motor 34 is first driven by the control unit 36 so that from the feed pump 26 previously sucked liquid is pressed through the check valve 24 into the mixing chamber 22. Then, the motor 42 is activated by the control unit 36, and the pump 44 presses the contents of the mixing chamber 22 into the cannula tube 46.
- the supplied treatment medium is introduced at a high speed into the tooth root canal because of correspondingly rapid actuation of the puncture 40, and the fluid reflected on the walls of the latter is dispensed in part through the upper open end of the tooth root canal in the form of syringes. These are retained by the underside of the splash guard part 52, which is placed on top of the tooth 48.
- the suction hose 60 is subjected to negative pressure and disposed of on the surface of the tooth 48 accumulating liquid.
- the motor 42 is activated by the control unit 36 so that is sucked by the pump 40 from the interior of the cannula tube 46.
- the activation time and the delivery capacity of the pump 40 is so dimensioned that within the activation time of the pump 40, a multiple of its medium is sucked back from the tooth root canal, which was delivered there in the feed phase.
- treatment liquid is aspirated from the lower end of the tooth root canal and, to that end, a considerable volume of air.
- the mixing chamber 22 thus comes in the pumping phase to a mixture of treatment liquid and air, which is retained there until the beginning of the next pumping cycle.
- control unit 36 By the control unit 36 is now the engine again 34 so activated, so that in the mixing chamber 22 receives a Vietnameses ⁇ amount of treatment liquid. This mixes in the mixing chamber and the subsequent pressing of Misch ⁇ room content in the cannula tube 46 with the mixture contained in the mixing chamber and thus forms a treatment fluid, which is a mixture of treatment liquid and air. This is pressed by the pump 40 back into the cannula tube 46.
- the flushing device 12 operates at a frequency of about 1-2 Hz, preferably about 1.6 Hz.
- timing and delivery rates of the pumps are selected to provide, for each pumping cycle, a supply of treatment liquid of about 60-70 ⁇ l, preferably about 65 ⁇ l, and the amount of fluid pumped back around each suction cycle about 120-140 ⁇ l. preferably about 130 ul.
- the dead volume formed by the interior of the cannula tube 46 is 10 ⁇ l
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05778294A EP1791488A2 (de) | 2004-09-07 | 2005-08-20 | Kanüle zum spülen eines zahnwurzelkanales sowie spülgerät mit einer solchen |
CA002581801A CA2581801A1 (en) | 2004-09-07 | 2005-08-20 | Cannula for flushing a tooth root canal and flushing device comprising the same |
US11/662,124 US20090017419A1 (en) | 2004-09-07 | 2005-08-30 | Cannula for flushing a tooth root canal, and flushing device comprising the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202004014051U DE202004014051U1 (de) | 2004-09-07 | 2004-09-07 | Kanüle zum Spülen eines Zahnwurzelkanales und Spülgerät mit einer solchen |
DE202004014051.9 | 2004-09-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2006027097A2 true WO2006027097A2 (de) | 2006-03-16 |
WO2006027097A3 WO2006027097A3 (de) | 2006-07-27 |
Family
ID=35207785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/009015 WO2006027097A2 (de) | 2004-09-07 | 2005-08-20 | Kanüle zum spülen eines zahnwurzelkanales sowie spülgerät mit einer solchen |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090017419A1 (de) |
EP (1) | EP1791488A2 (de) |
KR (1) | KR20070101215A (de) |
CA (1) | CA2581801A1 (de) |
DE (1) | DE202004014051U1 (de) |
WO (1) | WO2006027097A2 (de) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE860839C (de) * | 1950-02-11 | 1952-12-22 | Richard Dr Tangerding | Vorrichtung zum Einlassen von Medikamenten in Kanaele eines organischen Koerpers |
US4993947A (en) * | 1987-07-16 | 1991-02-19 | Meditec S.A. | Equipment for the treatment of dental roots |
DE4404983A1 (de) * | 1994-02-17 | 1994-09-08 | Steiger Erwin | Vorrichtung zur nichtmechanischen Bearbeitung und Aufbereitung von Zahnwurzelkanälen mittels Laserstrahlung |
US6422865B1 (en) * | 2001-01-22 | 2002-07-23 | Ultradent Products, Inc. | Endodontic irrigator tips having cannulas with annealed distal portions and related methods |
US6494713B1 (en) * | 1999-11-08 | 2002-12-17 | Gary J. Pond | Nickel titanium dental needle |
US20030207231A1 (en) * | 2000-06-07 | 2003-11-06 | Nance Robert Scott | Flexible endodontic syringe |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52155892A (en) * | 1976-06-18 | 1977-12-24 | Ricoh Watch | Root canal irrigator |
US6375459B1 (en) * | 1998-03-26 | 2002-04-23 | Deka Products Limited Partnership | Apparatus and method for cleaning teeth |
US6558344B2 (en) * | 2001-02-09 | 2003-05-06 | Westmed, Inc. | Wound irrigation device |
US6464498B2 (en) * | 2001-03-27 | 2002-10-15 | Gary J. Pond | Irrigation and aspiration handpiece |
-
2004
- 2004-09-07 DE DE202004014051U patent/DE202004014051U1/de not_active Expired - Lifetime
-
2005
- 2005-08-20 CA CA002581801A patent/CA2581801A1/en not_active Abandoned
- 2005-08-20 EP EP05778294A patent/EP1791488A2/de not_active Withdrawn
- 2005-08-20 KR KR1020077007869A patent/KR20070101215A/ko not_active Application Discontinuation
- 2005-08-20 WO PCT/EP2005/009015 patent/WO2006027097A2/de active Application Filing
- 2005-08-30 US US11/662,124 patent/US20090017419A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE860839C (de) * | 1950-02-11 | 1952-12-22 | Richard Dr Tangerding | Vorrichtung zum Einlassen von Medikamenten in Kanaele eines organischen Koerpers |
US4993947A (en) * | 1987-07-16 | 1991-02-19 | Meditec S.A. | Equipment for the treatment of dental roots |
DE4404983A1 (de) * | 1994-02-17 | 1994-09-08 | Steiger Erwin | Vorrichtung zur nichtmechanischen Bearbeitung und Aufbereitung von Zahnwurzelkanälen mittels Laserstrahlung |
US6494713B1 (en) * | 1999-11-08 | 2002-12-17 | Gary J. Pond | Nickel titanium dental needle |
US20030207231A1 (en) * | 2000-06-07 | 2003-11-06 | Nance Robert Scott | Flexible endodontic syringe |
US6422865B1 (en) * | 2001-01-22 | 2002-07-23 | Ultradent Products, Inc. | Endodontic irrigator tips having cannulas with annealed distal portions and related methods |
Also Published As
Publication number | Publication date |
---|---|
CA2581801A1 (en) | 2006-03-16 |
US20090017419A1 (en) | 2009-01-15 |
WO2006027097A3 (de) | 2006-07-27 |
KR20070101215A (ko) | 2007-10-16 |
EP1791488A2 (de) | 2007-06-06 |
DE202004014051U1 (de) | 2006-01-12 |
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