Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
  • A61C17/02—Rinsing or air-blowing devices, e.g. using fluid jets or comprising liquid medication
  • A61C17/024—Rinsing or air-blowing devices, e.g. using fluid jets or comprising liquid medication with constant liquid flow
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
  • A61C17/02—Rinsing or air-blowing devices, e.g. using fluid jets or comprising liquid medication
  • A61C17/0208—Rinsing or air-blowing devices, e.g. using fluid jets or comprising liquid medication combined with means providing suction
• • 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
  • A61C5/50—Implements for filling root canals; Methods or instruments for medication of tooth nerve channels
• • 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
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M3/00—Medical syringes, e.g. enemata; Irrigators
  • A61M3/02—Enemata; Irrigators

Definitions

• the present invention relates to an irrigation cannula intended in particular to equip an endodontic irrigation device or system for irrigation of the root canal teeth after shaping.
• Irrigation is an integral step in dental root canal treatment procedures. During this stage, an irrigation solution is injected into the dental root canal after it has been shaped in order to eliminate waste and debris and also for the purpose of disinfection.
• the commonly used irrigation solutions are sodium hypochlorite (disinfectant, antibacterial agent), EDTA (Ethylenediaminetetraacetic acid), hydrogen peroxide or chlorhexidine.
• the irrigation solution is injected via a cylindrical or conical irrigation cannula whose end is connected to a device for delivering the solution.
• the cannula is shaped to be inserted into the root canal without damage. Openings are made in the cannula to allow diffusion of the solution.
• the cannula must also be flexible in order to follow the shape of the root canal which is curved in general.
• the shaping of such cannulae is long and relatively expensive.
• a final problem is to avoid any damage to the canal walls when inserting or removing the cannula.
• the present invention aims to achieve an irrigation cannula for equipping an irrigation device of the dental root canal which is effective and whose manufacture is fast and inexpensive.
• the present invention aims at providing an irrigation cannula which makes it possible to solve the following problems:
• the present invention relates to an irrigation cannula according to claim 1, and to an irrigation system according to claim 9.
• FIG 1 illustrates an irrigation cannula according to the invention.
• FIG 2 is an enlargement of the tip of the irrigation cannula shown in Figure 1.
• Figure 3 is a sectional view of the irrigation cannula of Figure 1 along its longitudinal axis A-A.
• Figure 4 is an enlargement of the tip of the irrigation cannula shown in Figure 3.
• Figure 5 illustrates a first variant of the irrigation cannula according to the invention.
• Figures 6 and 7 are enlargements of the tip of the irrigation cannula according to the first variant illustrated in Figure 5.
• FIG. 8 is a sectional view along the longitudinal axis A-A of the irrigation cannula according to the first variant illustrated in FIG.
• Figure 9 is an enlargement of the tip of the irrigation cannula shown in Figure 8.
• Figure 10 illustrates a second variant of the irrigation cannula according to the invention.
• FIG. 11 is an enlargement of the tip of the irrigation cannula according to the second variant illustrated in FIG.
• Figure 12 is a sectional view along the longitudinal axis A-A of the irrigation cannula according to the second variant illustrated in Figure 10.
• Figure 13 is an enlargement of the tip of the irrigation cannula shown in Figure 12.
• An irrigation cannula comprises an active part 1 extending between a first end 2 and a second end 3 called tip.
• the active part 1 can be curved or straight, cylindrical or conical.
• the active part 1 is preferably flexible and has even more privileged flexibility increasing from the first end 2 to the second end 3.
• the active part 1 extends along a longitudinal axis AA and is conical, its diameter tapering from the first end 2 to the tip 3.
• the irrigation cannula according to the invention is intended to be connected by its first end 2 to an irrigation device or system (not shown) which traditionally comprises a source of irrigation solution and means for its diffusion from the source to the cannula.
• the first end 2 may have any suitable shape. It can in particular be a connector of Luer type (Luer-lock connector).
• the irrigation device may for example be constituted by a manually activated syringe or a pressure container such as a spray for diffusing an irrigation solution with a constant flow rate.
• the irrigation cannula comprises a central channel 4 extending in the active part 1 between the first end 2 and the tip 3.
• the central channel 4 is open at the first end 2 to communicate with the device irrigation system to which the cannula is connected and thus receive the irrigation solution.
• the central channel 4 is preferably closed at the tip 3 and does not cross this point 3, to prevent the irrigation solution is diffused directly towards the apex of the root canal.
• the tip 3 preferably has a rounded shape to reduce the risk of perforation or damage of the walls of the channel during the insertion of the irrigation cannula.
• the irrigation cannula comprises at least one but preferably two, three or four openings 5 arranged radially on the active part 1 near the tip 3 and communicating with the central channel 4 for the diffusion of the irrigation solution.
• the openings 5 are elongate and extend parallel to the longitudinal axis A-A of the cannula.
• the openings 5 are distributed so as to be diametrically opposed in pairs.
• the openings 5 have a bevelled shape and comprise an inclined plane 6 formed in the wall of the active part 1 of the cannula.
• the inclined plane 6 of an opening 5 extends from a breakthrough 7 in the central channel 4 to the outer surface of the active part 1 towards the first end 2 of the cannula.
• This beveled shape of the openings 5 is intended to direct the flow of the irrigation solution to the first end 2 of the active part 1, that is to say towards the top of the root canal and therefore the opposite of the apex when the cannula and its active part (1) is inserted into the channel. Indeed, with bevelled openings 5, the diffusion angle of the irrigation solution at the outlet of these openings 5 is reduced towards the tip 3 and the apex of the channel and is essentially directed towards the first end 2 of the cannula.
• the irrigation cannula according to the invention is dimensioned to be inserted, tip 3 forward, in a root canal previously shaped, without damage, while allowing the injection of irrigation solution in said channel.
• the openings 5 are dimensioned to ensure optimal diffusion of the irrigation solution.
• the irrigation cannula is obtained by thermoplastic micro-injection.
• a mold of the cannula is made, reproducing all the elements of the cannula and in particular the central channel 4, the first end 2, the tip 3 and the openings 5.
• a suitable plastic material such as PE or PP plastics is then injected in said mold according to the principles of thermoplastic micro-injection.
• the plastic material used is a plastic with high fluidity to ensure adequate filling of the mold in view of the reduced size thereof, the openings 5 and the central channel 4 in particular.
• the irrigation cannula thus obtained is directly ready for use without having to resort to another machining step and offers a very smooth surface condition limiting damage to the walls of the canal.
• the use of plastic materials guarantees the flexibility of the cannula while limiting production costs.
• thermoplastic micro-injection thus makes it possible to increase the production capacities and to reduce the costs while ensuring that the irrigation cannula obtained has all the required properties: flexibility, size, non-damaging surface, efficiency.
• the irrigation cannula furthermore has a flexible collar 8 near its tip 3.
• this flexible flange 8 extends radially relative to the active portion 1 and its longitudinal axis AA and is located between the tip 3 and the openings 5.
• This flexible flange 8 is arranged to deform when it comes into contact with the walls of said channel when inserting or removing the cannula and so do not damage the canal.
• the flexible collar 8 has the dual function of preventing the cannula from being inserted beyond the apex into the canal and acting as a barrier or shutter to prevent the irrigation solution from passing through the canal. apex and reach the periapical tissue.
• the flexible collar 8 forms a concave element (deformed in the direction of the first end 2) capable of partially blocking and redirecting the flow of irrigation solution towards the first end 2 of the cannula and up the root canal.
• the irrigation cannula according to this variant provided with a flexible collar 8 is also obtained by thermoplastic micro-injection molding with the appropriate mold, the use of plastic materials ensuring the flexibility of said collar.
• the irrigation cannula further comprises a projection 9 located in the central channel 4 of the active part 1 at the closed end of said channel near the tip 3
• This projection 9 extends parallel to the longitudinal axis AA of the active part towards the first end 2.
• This projection 9 may be cylindrical as illustrated or conical.
• the projection 9 is arranged in the central channel 4 and dimensioned to create a phenomenon of turbulence in the irrigation solution when it passes through the central channel 4 so that the flow of irrigation solution which is first directed to the tip 3 of the active part 1 under the action of the irrigation device, is redirected in contact with the projection 9 to the first end 2 of the cannula.
• the presence of the projection 9 further limits the portion of the flow of irrigating irrigation solution. openings 5 towards the tip 3 of the cannula and therefore the apex of the channel.
• the irrigation cannula according to this second variant is also obtained by a thermoplastic micro-injection process, the corresponding mold having the characteristics necessary for producing the projection 9.
• the irrigation cannula according to the invention is effective and safe since it ensures a good diffusion of the irrigation solution to ensure proper cleaning of the canal while limiting the risk that the solution protrudes beyond the apex and reaches the periapical tissue due to the shape of the openings and / or the collar and / or the projection inside the central channel.
• plastic materials it is very easy to adapt the flexibility of the cannula and obtain very smooth surface conditions limiting the damage that could be caused to the channel.
• the thermoplastic micro-injection process also makes it possible to reduce the costs and the production time since no other machining is required following the demoulding of the cannula.

Landscapes

• Health & Medical Sciences (AREA)
• Dentistry (AREA)
• Epidemiology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Oral & Maxillofacial Surgery (AREA)
• Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=54140471

Family Applications (1)

Country Status (4)

Citations (2)

Family Cites Families (8)

• 2015
  • 2015-09-16 US US15/758,676 patent/US20180250106A1/en not_active Abandoned
  • 2015-09-16 WO PCT/EP2015/071263 patent/WO2017045714A1/fr active Application Filing
  • 2015-09-16 JP JP2018514952A patent/JP2018527126A/ja active Pending
  • 2015-09-16 EP EP15763608.5A patent/EP3349682A1/de not_active Withdrawn

Patent Citations (2)

Non-Patent Citations (1)

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