CZ20003423A3 - Dental syringe - Google Patents

Abstract

A dental syringe tip handpiece assembly includes a plastic syringe tip mounted in an adaptor for connection to the handpiece. On the interior of the adaptor at a location adjacent the end of the syringe tip, a source of light is provided. Light from the light source will be transmitted down the length of the syringe tip and emitted from the end thereof. By positioning the end of the syringe tip in the patient's oral cavity, the dentist can provide illumination in the oral cavity so that various dental functions can be more easily and accurately performed.

Description

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental syringe with illumination, in particular an illuminated front of a syringe and a handle, in which the single-use front of a syringe is used to transmit light from a light source in the adapter to the patient's oral cavity. cavity.

U.S. Pat. No. 5,049,071 to Davis et al. Discloses a front portion of a disposable plastic syringe. This patent also describes various adapters which can be used to connect this front of the syringe to the syringe handle provided with leads for various environments. In addition, U.S. Pat. No. 5,192,206 (Davis et al.) Describes another type of adapter for use in syringes of this type.

Recently, the use of a single-use plastic dental syringe has become widespread due to the need to avoid certain types of infections such as hepatitis or AIDS. Dentists take great care to prevent the transmission of viruses or bacteria from one patient to the next. Water and air are supplied under pressure to the front of the plastic syringe. On the handle there is a control button for the air supply and water supply, so that it is possible to alternately or simultaneously supply water, air or a mixture of these substances to the patient's mouth.

It is highly desirable to illuminate the patient's oral cavity so that the dentist can more easily perform the necessary treatment. Most dentists' surgeries are equipped with an overhead illumination system with reflective surfaces to help focus light into the patient's mouth. In many cases, however, the dentist is standing

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• 0 in the path of this light, which significantly reduces the efficiency of this type of lighting.

Many dental instruments are already equipped with a light source for easier oral cavity treatment. E.g. The dental drills may be provided with an optical fiber bundle that transmits light from the light source to the end of the drill so that it is illuminated directly instead of the drilling hole. This method of illumination has been described in the patents

US 4,507,085 (Mosimann) and US 5,088,924 (Woodward).

The dental drill handles have also already been provided with a light source to illuminate the area to be supplied with air and / or water. Such a device has been described in US 4,619,612 (Weber). It is a bundle of optical fibers placed in front of the center of the front of the metal syringe. The light source is a bulb placed in the inner part of the handle. However, the front of the syringe of this patent is a metal middle portion that must be sterilized in an autoclave prior to use by the following patient.

Illumination syringes have been described, but to date no front end of such a disposable syringe having a light source for transmitting light to the oral cavity has been described. Dentists using these front ends of disposable syringes must rely on conventional lighting systems used in dental surgeries when using a syringe to deliver air and / or water to a patient's oral cavity.

It is an object of the present invention to provide a useful light source for transmitting light to a patient's oral cavity in connection with the use of a dental syringe for air and / or water delivery.

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It is also an object of the present invention to provide an end of the front of the syringe with a light source in the interior of the adapter that connects the front of the syringe with its handle. Light from the light source should be directed to the end of the front of the syringe along its length. At the front end, light should be emitted to illuminate the patient's oral cavity.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a dentist with illumination of a patient's oral cavity using the same tool that the dentist uses to supply air, water or air / water mixtures to the patient's oral cavity. In this way, any treatment requiring the use of a syringe to deliver water and / or air can be made easier, safer and more efficient, since the dentist will be able to accurately observe the work site in the oral cavity.

SUMMARY OF THE INVENTION

The present invention provides a dental syringe for delivering light from the front of the syringe to the oral cavity, the syringe comprising:

a) hollow adapter for fixing the front of the syringe,

(b) an extension spindle in the inner part of the adapter, the extension of the spindle being chamfered at its end; and

c) a light source located in the inner part of the adapter near the beveled extension of the spindle, the light coming from the light source to the end of the front part of the syringe mounted on the beveled stem, i.e. along the entire length of the front part; patient's oral cavity.

Thus, the dental syringe of the invention is provided with a transparent front part of a plastic syringe mounted in an adapter for engaging it with the handle. A light source, preferably in the form of an optical fiber ring, is disposed within the adapter near the front. The light from this source is transmitted along the entire length of »φ φ · · · • •φφφφφ · · · · · · ·φφφφφφφφφφφφφφφφφφφφφφφφφφφφ φφ front and radiates from its end. By placing the end of the anterior portion in the patient's mouth, the dentist can illuminate the oral cavity so that treatment can be accomplished more easily and accurately.

The syringe handle is formed by an inner unit and an outer shell and is adapted to receive the adapter and the front of the syringe. Inside the handle there is an air inlet, water inlet and optical fibers. The handle can be easily disassembled for cleaning.

The light source may also be a small bulb at the end of the adapter. The adapter is made of clear or at least translucent material so that light from this bulb can pass through the adapter to the front of the syringe.

According to another possible embodiment of the invention, the light source may be one or more optical fiber bundles passing through the syringe. The ends of the optical fiber bundles are disposed near the end in the front of the syringe, so that it emits light from it that has previously passed the entire length of the syringe and can be used to illuminate the patient's oral cavity.

The invention will now be described in more detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 shows a partially exploded syringe with a handle according to the invention.

Fig. 2 shows a cross-section of a syringe according to the invention in the region of the adapter, the syringe front and the fastening part. It is obvious how

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in this way, the fastening part is connected to the handle. All parts are shown in the closed position.

FIG. 3 is a cross-sectional view of the syringe in the region of the adapter, front, and fastening portion, all of which are shown in the open position.

Fig. 4 shows the syringe handle of the present invention with the outer shell removed.

Figure 5 is a cross-sectional view of one end of the handle shown in Figure 4.

FIG. 6 is a cross-sectional view of the end portion of the front portion of the syringe of the invention.

Fig. 7 is a cross-sectional view of another embodiment of a syringe of the invention in which the bulb is located as a light source at the rear of the adapter.

Fig. 8 is a partially exploded view of another embodiment of the front of the syringe of the invention.

Fig. 9 is a partially exploded view of a head and optical fiber bundle assembly according to another embodiment of a syringe of the invention.

Fig. 10 shows the same embodiment of the syringe according to the invention in longitudinal section in the closed position.

Fig. 11 is a cross-sectional view of the environmental distribution of this further embodiment, showing in particular the location of the water inlet ducts.

Figure 12 is a perspective view of the same portion of another embodiment of a syringe of the invention in a partially exploded state;

Fig. 1 shows a dental syringe assembly 300 of the present invention. The handle body 312 is provided with an outer shell 410 slidably mounted on the indoor unit 430. The indoor unit 430 generally forms a U-shaped channel with a hollow interior for receiving water, air and fiber optics. Each of these leads is connected to the handle body 312 by a lead 470 that leads to water, air and light fiber sources (not shown).

An adapter 320 is mounted at one end of the handle body 312, on which the front end 314 is secured and thereby connected to the body 312. The fastening portion 330 holds the front portion 314 firmly in place.

As shown in FIGS. 2, 3 and 5, the handle body 312 is provided at one end with a threaded hole 313 for screwing the adapter 320 using the first adapter thread 322. The central portion of the adapter 320 is provided with a hexagonal hole 316 for receiving a screw for securing the adapter 320 in the hole 313 of the handle body 312.

In the illustrated embodiment, the entire syringe of the invention may be of conventional shape, typically used in dentist's surgeries, although the individual components of the syringe may be modified in various ways. Further details regarding adapter 320 can be found in US 5,049,071.

The disclosed system securely maintains the front end 314 of the syringe in the handle body 312 so as to avoid undesirable release of the front end 314 and water and air still being supplied through the front end 314 which does not spontaneously separate from the adapter 320. a sleeve 340 abutting the outer end of the adapter 320, a ring 342, and a fastening portion 330 that can be screwed into the adapter 320 to surround the sleeve 340. The inner portion of the fastening portion 330 is threaded 332 to cooperate with a second thread 326 of the fixed adapter 320 mounting of the fastening portion 330 on the adapter 320. Further details regarding this system can be found in U.S. Pat. used front 314 of the syringe and replacing it with a new front parts 314th

The front portion 314 of the syringe is an elongate cylindrical member, preferably made of plastic. The front portion 314 of the syringe can be pressurized to the tapered spindle 321 of the adapter 320. Further details regarding the front portion of the syringe can be found in US 5,049,071. The front portion 314 of the syringe must be made of a material that allows light to pass through on the other. In a preferred embodiment of the invention, the syringe tip 314 is made of polypropanoate, although other light transmissive plastics such as acrylic acid plastics may also be used.

Accordingly, the front portion 314 of the syringe of the invention should preferably be clear or transparent, this feature also permitting rapid determination as to whether said portion of the syringe has been used. After using this part, its transparency makes it easy to detect its contamination with blood or other material.

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The front portion 314 of the syringe of the invention is for single use only. It is manufactured by simple extrusion in a single stage and, as already mentioned, is made of any rigid transparent plastic that transmits light. Rigid plastic is advantageous since the syringe is also often used to push the tongue or facial mucosa away from the treatment site.

The front portion 314 of the syringe is pushed onto the tapered spindle 321 at the end of the elongated portion 325 of the tapered spindle 321. This tapered spindle 321 is integrally connected to the elongated portion 325 protruding from the rear end of the adapter 320 into the handle body 312. The rear end of the elongated portion 325 is threaded and can be screwed into the thread of the hexagonal hole 316 in the inner body 312. The rear end of the elongated portion 325 is connected to the water supply 444 for supplying water to the front portion 314 of the syringe according to the invention.

Similarly, the adapter 320 is provided with an air inlet 442 via an air duct 328 in the adapter 320 into which the air inlet 442 opens.

As shown in Figures 2 and 3, the fiber optic ring light source 360 is disposed directly at the end of the front portion 314 in the interior of the adapter 320 so that light extends through the entire length of the front portion 314. In a preferred embodiment of the invention from Fiberoptics Technology Incorporated, 14 Fiber Road, Pomfret, CT 06258, although any other fiber types may be used. The optical fibers 360 are coupled to the optical fiber bundle 363 that passes through the passageway 448 in the handle body 312 for connection to a light source (not shown).

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An annular seal 365 is disposed within the inner portion of the adapter 320, which snaps into the flexible ring 368. The flexible ring 368 surrounds the elongated portion 325 of the tapered spindle 321 and the optical fiber bundle 363 and holds them firmly in place in the inner portion of the adapter 320.

As shown in Fig. 2, when the fastening portion 330 is mounted on the adapter 320 in the closed position, the ring-shaped optical fibers 360 are located near the end of the syringe front 314 in the interior of the adapter 320. The optical fibers 360 and light will extend along the entire length of the front part 314 of the syringe to its end, from which it will radiate into the patient's oral cavity.

FIG. 4 shows details of the inner unit 430 of the syringe handle body 312. Inside the indoor unit 430 in the U-channel is a water inlet 444 and an air inlet 442, in this way the environments are brought from the source to the adapter 320. The valve 454 is housed in the water inlet 444 and is activated by a doctor by pressing the control button 453 Similarly, the air valve 452 is housed in the air inlet 442 and is actuated by a physician by pressing a button 451 on the outer casing 410.

The indoor unit 430 is also provided with a conventional mounting pin 462 to cooperate with an opening 464 in the outer housing 410. When seated in place, the outer housing 410 is displaced along the length of the indoor unit 430 until the mounting pin 462 engages the opening 464 to secure the outer the housing 410 in place during use of the syringe of the invention. If the entire assembly is to be cleaned, simply press the fastening pin 462, then the outer shell 410 can be removed by sliding from the indoor unit 430. The adapter 320 is unscrewed from the handle body 312 and the outer shell 410 can then be cleaned,

an adapter 320, a fastening portion 330, and a sleeve 340, for example by autoclaving.

FIG. 6 illustrates a modification of the syringe tip 514 to provide accurate fit of the tip end 514 in the adapter 320. The tip end 514 has a central water channel 522 and a plurality of air channels 524 around the water channel 522. One end of the syringe tip 514 has a groove. 530, which corresponds to the complementary elevation 540 of the adapter 320. This means that if the front end 514 is to be correctly received in the adapter 320, the groove 530 must be located on the elevation 540. If this position is not observed, it will not be possible to fit the front end 514 on the tapered spindle 321 and water and air leakage problems occur.

Of course, other changes and variations could be made. For example, instead of ring-shaped optical fibers 360, another light source could be used, for example, a suitable bulb could be inserted into the interior of the adapter 320 from which light would pass along the entire length of the front end 514 into the patient's cavity.

As shown in FIG. 7, showing another preferred embodiment, the handle body 612 is provided with an adapter 620 for attaching the front end 614 of the syringe to the handle body 612. In this embodiment, the adapter 620 is made of a relatively hard plastic, such as polycarbonate or hard acrylic resin. The adapter 620 must also transmit light from the light source 660 to the front end 614 of the syringe, so that the material of which the adapter 620 is made must be light transmissive. In a preferred embodiment, the material is a clear transparent plastic, but in principle a translucent material is sufficient.

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The adapter 620 is received at the end of the handle body 612 by an annular mounting ring 650 with an external thread 652 to cooperate with an internal thread 622 of the adapter 620. The annular ring 650 may be provided with a notched notch on its surface to receive a screwdriver to insert the annular 650 into the internal thread 622.

The adapter 620 is provided with a beveled spindle 621 for securing the front end 614 of the syringe. Adapter 620 includes a water passage 628 and an air passage 629. These portions serve to supply water and air from the handle body 612 to the front end 614 of the syringe. The fastening assembly securely retains the front end 614 of the syringe in the handle body 612 so as to prevent unwanted spontaneous release of the front end 614 and to keep air and water still supplied to the front end 614. The fastening system generally comprises an adapter 620, sleeve 640 mounted. to the outer end of adapter 620, ring 642, and fastening portion 630 intended to be screwed into adapter 620 and surrounding sleeve 640. In the interior of fastening portion 630 there are threads to cooperate with second thread 626 of adapter 620 to securely fit fastening portion 630 to adapter 620 .

The adapter 620 is provided with a recess 625 for the light source 660. The light source 660 is mounted on a base 662 housed in the handle body 612. Base 662 for light source 660 is coupled to a distant and not shown current source by means of wire 670.

When the light source 660 is activated by switching on the electric current, the lens 668 concentrates the light into the adapter 620, from which the light is transmitted to the front end 614 of the syringe and from there to the patient's oral cavity.

It is desirable to minimize the heat emitted by the light source, so that optical fibers or fluorescent light should be preferred, since the heat emitted from these light sources is minimal. It is also contemplated that it would be possible to concentrate light from the light source by means of reflective surfaces directly on the end portion of the forward end 614 of the syringe. In this way, it would be possible to increase the light intensity without increasing the dimensions of the light source and at the same time to increase the light intensity for light transmission along the entire length of the front end 614.

As shown in Figures 8 to 12, where other embodiments of the invention are shown, one or more optical fiber bundles may be used to transfer light from the light source through the handle to the front of the syringe to illuminate the patient's oral cavity.

The entire assembly 700 is generally shown in Fig. 8. The handle 712 includes connecting conduits for the optical fiber bundles 760 and for air and water sources, i.e. water inlet 756 and air inlet 758. The handle 712 is threaded or otherwise suitably connected to the head 720 provided with the thread extension 722. The head 720 is also provided with an air valve 752 and a valve 754 in the water supply 756 to control the supply of these environments in the usual manner. As shown in Fig. 9, the extension 722 includes one or more optical fiber bundle apertures 728, the apertures 728 serving to accommodate the optical fiber bundles 760 and also to accommodate the water inlet 724 and to connect to the water inlet 756 as well as for receiving the air adapter 726 for connection to the air inlet 758.

The head 720 is also threadedly connected to a nut 740 coupled to a fastening collar 750 for securely storing the front.

The structure of the nut 740 with the collar 750 is disclosed in U.S. Patents 5,306,146 and 5,489,205.

A divorce body 770 is disposed within the inner portion of the head 720. It is a generally cylindrical portion provided with a tapered spindle 780, as shown in Figure 10, on which the front end 714 of the syringe is fastened in the manner disclosed in U.S. Pat.

No. 5,236,356. A sheath 776 is disposed on the front portion 772 of the distribution body 770. The distribution body 770 includes apertures 728 for optical fiber bundles 760. The air inlet is connected to an air connection 778 which is mounted on an air conduit 782 extending in the longitudinal direction through the body 770. The water supply for the body 700 is connected to a water connection 779 connected to the water conduit 790 also extending in the longitudinal direction through the body. 770. The water conduit 790 is connected to the transverse water conduit 788 in the body 770 and thus also to the axial water conduit 786 in the body 770, which is finally connected to the longitudinal water conduit 784 in the body 770 for supplying water to the spindle 780 and thence to the end portion 714 of the syringe.

FIG. 10 shows a longitudinal section through the body 700 in an assembled state. The head 720 is screwed into the handle 712 and the body 770 is connected to the front 772 and the housing 776 and inserted into the recess in the head 720 of the nut 740 after screwing into the head 720 keeps the body 770, the front 772 and the housing 776 in place, is designed to seal this connection. The front end 714 is pushed into the nut 740 and one end pushes the spindle 780. The front end 714 is securely held on the spindle 780 by the collar 750 and ring 751 when the nut 740 is screwed into the head 720.

The end of the front end 714 is disposed near the end of the fiber optic bundle 760, so that in the event of activation of a not shown optical fiber (not shown)

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of light source, the light transmitted by the optical fiber bundle 760 is transmitted to the end of the syringe end portion 714 from where it is transmitted to the oral cavity. Any means may be used to activate the light source.

Simultaneously with the activation of the light source, the dentist can depress the air valve 752 so that air from port 758 begins to pass through line 782 to the duct at end portion 714. Similarly, when valve 754 is actuated therefrom to the axial conduit 786 and then to the longitudinal water conduit 784 which connects the central passage of the water supply spindle 780 to the end portion 714.

The invention has been illustrated in connection with several preferred embodiments of a syringe according to the invention, but it will be apparent that many changes and modifications may be made within the scope of the invention, so that the invention cannot be limited thereto.

Represented by:

Claims (21)

PATENT CLAIMS »···» · · A dental syringe for delivering light from the front of a syringe to an oral cavity comprising: a) hollow adapter for fixing the front of the syringe, (b) an extension spindle in the inner part of the adapter, the extension of the spindle being chamfered at its end; and c) a light source located in the inner part of the adapter near the beveled extension of the spindle, the light coming from the light source to the end of the front part of the syringe mounted on the beveled stem, i.e. along the entire length of the front part; patient's oral cavity. 2. The dental syringe of claim 1 wherein the light source comprises a fiber optic ring surrounding the extension of the tapered spindle. 3. A dental syringe according to claim 1, wherein the dental syringe is provided with a front end for transmitting light mounted on a tapered spindle. 4. An illuminated front end of a syringe and a dental syringe handle assembly comprising: a) handle with handle body, b) an adapter mounted on the handle body and formed of a hollow part provided with an external thread and a beveled spindle inside the hollow part; c) front end mounted on adapter, (d) a mounting assembly to hold the forward end of the syringe on the adapter; and (e) a light source mounted within the hollow part of the adapter near the end of the syringe end; 9 9 9 9 9 9 Wherein, when the light source is turned on, the light is directed to an end portion of the front end mounted on the tapered spindle so that light is transmitted along the entire length of the front end from where it is emitted to illuminate the physician's workstation. Assembly according to claim 4, characterized in that it comprises a fiber optic ring as the light source. An assembly according to claim 4, wherein the handle body comprises a) indoor unit with hollow space with U-shaped cross-section, b) water supply and air supply, housed in a hollow space and connected to the adapter, (c) an optical fiber bundle, housed in a hollow space and connected to a light source; (d) an outer shell slidably supported on the indoor unit; and e) means for separating the outer shell from the indoor unit and separating the adapter from the indoor unit to clean such parts, for example by autoclaving. A front end of a syringe, characterized in that it comprises (a) a cylindrical elongated plastic element with a full-length passage through that element; (b) additional passages located around the first central passage; c) means for fastening the front end to the adapter in the correct position. The front end of claim 7, wherein the means for attaching the front end to the adapter is formed by a groove at the front end. 0 00 0 • 00 • 0 00 00 0 0 0 0 0 0 0 0 0 0 0 0 0 00 00 9. A dental syringe adapter for transmitting light from the rear end of a clear front end to a patient's cavity comprising: (a) the main light transmission part; and (b) means for attaching the front end to the portion, wherein the light source is disposed adjacent to the adapter and when lit, the light is transmitted directly through the body of the adapter to the front end of the syringe mounted on the adapter; it is emitted from the end portion. 10. A dental syringe handle assembly for transmitting light from a distal end to a front end, comprising: (a) an adapter for attaching the front end of the syringe in the handle, the adapter comprising a light transmitting body; (b) means for attaching the front end to the adapter; and c) a light source mounted near the adapter, wherein when the light source is lit, light will be transmitted by the body of the adapter along the entire length of the front end and emitted from the end portion. Assembly according to claim 10, characterized in that the means for securing the front end of the syringe is a beveled spindle integral with the adapter. Assembly according to claim 10, characterized in that it comprises, as a light source, a bulb placed in the recess of the adapter. The assembly of claim 10, further comprising a front end for transmitting light mounted on the adapter. 9 * 9 99 9 9 9 9 9 9 • 9 9 9 9 9 9 9 9 9 9 9 •• 98 9 98 99 An illuminated front end and dental syringe handle assembly, characterized in that it comprises a) handle body, (b) an adapter mounted in the body and formed by a light-transmitting body; c) adapter with integral bevel spindle, d) front end, mounted on the beveled spindle, (e) a mounting assembly for attaching the front end to the adapter; and f) a light source disposed in the vicinity of the transparent body of the adapter, wherein when the light source is switched on, the light is directly transmitted through the body of the adapter through which it passes along its entire length and is then emitted from the end portion. 15. An adapter for attaching a forward end of a syringe to a handle, characterized in that it comprises (a) a rigid body, provided with a slot of appropriate size for insertion of the end of the front end of the syringe, the rigid body being made of a light-transmissive material; and b) a tapered spindle integrally connected to the solid body at the end of the slot, wherein upon insertion of the front end of the syringe into the slot, the front end is secured to the tapered spindle. 16. An adapter according to claim 15, wherein the body is provided with a second slot for attaching the light source. 17. An adapter according to claim 15, wherein the front end is mounted on a tapered spindle. · · To to to to to to to to to to to to to to to to to <<<<<<<<<<<<<< ··· ··· ··· ········· 18. A front end and dental syringe handle assembly for transmitting light from a clear front end, comprising: (a) a generally hollow handle containing a light source, a water source and an air source; (b) a head connected to the handle and fitted with a water valve and an air valve; c) a manifold housed inside the head and comprising a spindle adapted to secure the forward end of the syringe; d) water line for water supply from the water source to the spindle, (e) air intake for supplying air from the air source to the forward end of the syringe; and f) means for transmitting light from the light source to the spindle, wherein when the light source is switched on, the light is transmitted from the light source to the front end of the syringe mounted on the spindle so that light can extend along the entire length of the front end and emit to the doctor. 19. The assembly of claim 18, further comprising a front end, light transmissive and mounted on the tapered spindle. 20. A front end and dental syringe handle for delivering light from a distal end of a clear, light transmissive front end, comprising: (a) a generally hollow handle containing at least one fiber optic bundle, a water source conduit and an air source conduit; (b) a generally hollow head connected to the handle and fitted with a water valve and an air valve; c) a manifold inside the head containing the spindle to fit the front end of the syringe; d) distribution, further comprising a conduit for water supply from the source through the spindle to the front end, e) a manifold, further comprising a duct for supplying air from the source to the forward end; (f) a nut and a collar attached to the head for securing the front end to the spindle at the end of the timing; and g) a distribution, further comprising at least one optical fiber bundle aperture for passing optical fibers through the handle and terminating the optical fiber bundle near the front end of the distribution, wherein when the optical fiber bundle is illuminated, light is transmitted from that bundle to the end of the front end to be attached to the spindle so that light is transmitted along the entire length of the front end and radiates from the end portion to illuminate the dentist's workstation. 21. The assembly of claim 20, further comprising a forward end of the syringe, transmissive to light, and mounted on the tapered spindle.