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
  • A61C17/06—Saliva removers; Accessories therefor
  • A61C17/08—Aspiration nozzles

Definitions

• the present invention relates to a nozzle intended for saliva suction extraction, the nozzle being designed as a tube which, at ⁇ least at its one end, is bevelled and is insertable in a mounting 5 connected to a suction pump.
• the nozzle may be used both by the dentist or by the dental nurse, and the nozzle can suck up sal- 10 iva, water mist from turbine-driven drills, and heavier materials such as, for example, amalgam lumps and the like.
• the nozzle In order to permit the suction of such heavy objects as amalgam lumps, the nozzle must be connected to a very powerful suction pump whose suction capacity cannot normally be regulated and which must, therefore, be dimen- 15 sioned so as to cater for maximally unfavourable working con ⁇ ditions.
• the suction force in the nozzle is con ⁇ siderable, which may lead to discomfort and irritation both for the dentist and for the patient.
• the air flowing into the nozzle may cause powerful noise which is parti- 20 cularly irritating if the patient's cheek is caused to vibrate by the inrushing air.
• the object of the present invention is to realise a noz ⁇ zle of the type mentioned by way of introduction, the nozzle being designed in such a manner as to improve the degree of noise comfort during dental treatment, at the same time as the risk that the noz- zle be sucked fast is eliminated.
• the nozzle intimated by way of introduction is characterised in that it has an opening in its outer surface which is located in the prox- imity of the bevelled end of the nozzle.
• the open ⁇ ing in the circumferential direction is located approximatel cen- ⁇ tred in relation to a longitudinal line on the outer surface of the tube, the line departing from a point most proximal to the centre of the tube on the edge of the bevelled end opening of the tube.
• the nozzle may, with its side facing away from the opening, be used to move aside the cheek of the pati ⁇ ent during treatment, without the risk of becoming blocked.
• the subject matter of the present invention is further suitably characterised in that the opening is located so close to the bevel ⁇ led end opening of the nozzle that it may be masked by the mounting if this end of the nozzle is inserted therein.
• the advantage will be afforded that the nozzle, if it is bevelled at both ends, is reversible so that, in one position in the mounting, the lateral opening is masked, while the lateral opening is exposed when the op ⁇ posite end of the nozzle is inserted in the mounting.
• Fig. 1 shows a first embodiment of the nozzle according to the present invention, inserted in a mounting shown by broken lines;
• Fig. 2 shows the nozzle of Fig. 1 turned 90° through its long ⁇ itudinal axis; and Fig. 3 shows a modified embodiment of the nozzle seen from the same direction as the nozzle of Fig. 2.
• the nozzle according to the present invention is in the form of a sub- stantially cylindrical tube 1 which has at least its one end 2, but preferably also its other end 3, bevelled in relation to the long ⁇ itudinal axis of the tube.
• the angle of bevel may ⁇ amount to approximately 45°, but may, naturally, deviate from this figure in either direction as desired.
• the tube 1 is manufactured of a plastic material and may have an outer diameter of the order of magnitude of from 9 to 16 mm, while its material thickness may suitably be about 1 mm.
• the total length of the nozzle may amount to from 10 to 18 cm.
• the nozzle has, at its one end adjacent the bevelled end 2, an opening 5 which, in the illustrated embodiment, is a V-shaped recess which is cut straight through the wall of the tube in a direction which is at right angles to the longitudinal axis of the tube.
• the opening 5, as seen in Fig. 1 may have a cross-section which differs from the dis- closed V-shape, and may, thus, be approximately U-shaped, rec ⁇ tangular or even undercut in its form.
• the opening by moving, simultaneously with the cut ⁇ ting of the tube at its one bevelled end, a recessing knife together with the cutting knife in a direction which is at right angles to the longitudinal axis of the tube so that the opening is thereby cut through the body material of the tube. If, in this operation, the recessing knife has an edge which, in the direction of movement of the knife, is spiculated most proximal the centre line of the tube, that portion of the wall of the tube which is cut away will be fol ⁇ ded outwardly from the tube so as to avoid the presence of foreign matter or "burrs" interiorly in the tube.
• the recess or opening 5 is to be located at that edge portion 6 of the bevelled end opening 2 which is located most proximal the centre point of the tube 1.
• This design should be symmetrical, so that the opening 5 is approximately centred about a line running longitudinally in the tube and de ⁇ parting from a point on the edge portion 6 which is located most proximally the centre point of the tube.
• the opening 5 is placed in such a manner that the distance to the edge portion 6 is so slight that the opening 5 may be masked by the mounting 4 if that end of the nozzle provided with the opening is inserted in the mounting.
• a nozzle which is bevelled in both ends but which is pro ⁇ vided with the opening 5 in only one end may be optionally reversed in the mounting so that the opening 5 is either exposed or con- cealed.
• the tube 1 it is, naturally also possible to provide the tube 1 with openings 5 in both ends and, in such a case, it is absolutely necessary that the openings 5 be placed such that they can be masked by the mounting 4. If only one opening 5 is provided, it is, of course, also pos ⁇ sible to displace this opening away from the bevelled opening 2, so that it may, in principle, be located at any given position along the tube 1.
• the free area in the ope- ning 5 may not be so great that the flow pattern about the bevelled end 2 of the nozzle is affected to any appreciable degree.
• the opening 5 must be so large that, for example, the cheek of the patient cannot be sucked fast to the bevelled opening 2 even if this were to be located very close to the cheek.
• a suitable adaptation of the area of the opening 5 is at ⁇ tained if the area is selected at a value in the range of from 15 to 4055 of the inner area of the tube proper.
• FIG. 1 should lie in the ra ⁇ nge of between 15 and 40% of the diameter of the tube.
• This design also imparts a suitable extent to the opening 5 in the circu - • ferential direction of the tube.
• DESCRIPTION OF MODIFIED EMBODIMENT Fig. 3 shows a modified embodiment of the present invention, the modification residing in the fact that the opening 5 has been replaced by two openings 7 located approximately side-by-side along a circumferential line of the tube. Concerning the placing of these openings 7, reference is made to that disclosed above relating to the opening 5.
• FIG. 3 merely illustrates the employment of two op ⁇ enings, a larger number may, naturally, also be employed, in which case these may be placed both along lines in the circumferential di ⁇ rection of the tube and in the longitudinal direction of the tube. Of course, several rows of such openings 7 may be provided. The to ⁇ tal area of these openings should amount to between 15 and 40% of the inner area of the tube.
• edges may not be sharp, this re- lating to both the edges of the openings 5 and 7 and to the bevelled end openings.
• profile of the end opening 2 this may be planar or straight, as shown on the Drawing. However, it may also be pro ⁇ vided with a toothed, waved or curved profile. In this latter case, it is merely necessary to ensure that the design is of single cur- vature so that it may be manufactured by means of a knife which is movable transversely of the longitudinal axis of the tube and em ⁇ ployed for cutting the individual tubes from a longer, continuous, extruded tube body.
• the knife or cutting tool employed for making the lateral opening 5 need not move at right angles to the longitudinal axis of the tube, it being sufficient that the movement of the knife be approximately transversely di ⁇ rected in relation to the longitudinal axis if the longitudinal axis of the opening or recess 5 is permitted to make an angle with the longitudinal axis of the tube.

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)
• Infusion, Injection, And Reservoir Apparatuses (AREA)
• External Artificial Organs (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20360101

Family Applications (1)

Country Status (4)

Families Citing this family (4)

Family Cites Families (7)

• 1985
  • 1985-05-07 SE SE8502232A patent/SE8502232D0/xx unknown
• 1986
  • 1986-05-06 WO PCT/SE1986/000209 patent/WO1986006613A1/en not_active Ceased
  • 1986-05-06 EP EP86902954A patent/EP0259321A1/en not_active Withdrawn
• 1987
  • 1987-01-06 DK DK004087A patent/DK4087D0/da not_active Application Discontinuation

Non-Patent Citations (1)

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