CN216318085U

CN216318085U - Root canal flushing device with back suction function

Info

Publication number: CN216318085U
Application number: CN202122398061.6U
Authority: CN
Inventors: 孙祖录; 岳波
Original assignee: Aibolaite Suzhou Technology Co ltd
Current assignee: SUZHOU PAC-DENT TECHNOLOGY CO LTD
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-04-19
Anticipated expiration: 2031-09-30

Abstract

A root canal flushing device with a suck-back function comprises a root canal flushing head and a suck-back needle tube, which are detachably assembled; the root canal flushing head comprises a rod-shaped body, a flushing flow channel is arranged along the length direction of the rod-shaped body, the front end of the flow channel is a flushing port, and the rear end of the flow channel is communicated with a dental flushing device; the suck-back needle tube comprises a needle head part and a tube body part, wherein the lower end of the needle head part is a liquid suction end and extends into a root canal of a tooth; the rear end of the pipe body part is communicated with the dental resorption device; the front end of the root canal flushing head is bent upwards to form a forward inclined needle part, and the central line of the needle part in the length direction and the central line of the rod-shaped body in the length direction form an included angle alpha; the flushing port at the front end of the flushing flow channel is bent downwards, and an included angle beta is formed between the central line of the cross section of the flushing port and the central line of the needle head part in the length direction. The present invention provides a safer, cost effective and efficient method for continuously delivering irrigation fluid without tip pressure while safely evacuating it through negative pressure.

Description

Root canal flushing device with back suction function

Technical Field

The utility model relates to a dental medical instrument, in particular to a root canal flushing device with a back suction function for cleaning a root canal during endodontic treatment.

Background

Endodontic treatment aims to remove microorganisms from the root canal by mechanical, chemical means, inactivate their by-products, and perfectly seal the root canal space to prevent future recontamination of the root canal space. If the canal can be thoroughly cleaned with a single flush and then effectively sealed, no mechanical instruments are required.

Initial cleaning of the root canal is typically performed by mechanical instruments to remove most of the pulp tissue, necrotic debris and bacterial biofilm or prior root filling material. If the original material in the tooth root is not removed, further cleaning can not be carried out. The mechanical instrument uses the stainless steel hand root canal file or the nickel titanium (NiTi) rotary and/or reciprocating root canal file driven by the engine, the two root canal files can not clean the root canal completely, but can create a space after being used to inject the flushing liquid, thereby playing the cleaning role. A significant portion of the root canal wall is not directly accessible to instruments and irrigation is considered the primary method of cleaning and disinfecting areas of the root canal system. However, it is well known that unless the root canal is properly enlarged, the irrigant (i.e., sodium hypochlorite) cannot be used effectively to clean and disinfect the tip portion of the root canal base. Various irrigation agents, techniques and equipment are needed for use with mechanical instruments to improve the cleaning and disinfection of root canal systems.

Generally, devices for root canal irrigation include the use of conventional endodontic syringes and open-ended or closed cannulas for irrigation of root canals. This prior art is most widely used because it does not require any special equipment to operate and allows reasonable control of the depth of the cannula and the amount of irrigation fluid delivered.

Irrigation is an important component of endodontic treatment because it can enhance debridement and disinfection of the poorly cleaned areas of the instrument. Irrigation is mainly performed by means of a syringe and a needle (or cannula), but this simple method does not clean the distal area of the root canal system. Even in the main root canal, the instruments cannot reach all areas of the canal wall. This occurs because of factors related to instrument features and/or root canal anatomy. For example, in root canal preparation, if the final instrument is used in a size smaller than the initial root canal diameter, it is expected that more untouched areas will remain. With respect to anatomy, bending can introduce complications to the instrument because the cutting action of the instrument along a bent root canal is more concentrated on some of the canal walls than on others. Thus, certain areas may not be affected by the instrument. Furthermore, C-shaped and oval/flattened root canals have irregular morphologies that do not match the circular preparation provided by rotary instrument systems. As a result, as expected, root canals having these morphologies present a large area of unused instruments after preparation, as the instruments may not reach all of the distal root canal ends.

The main reason for the persistence of bacteria is the inability of current technologies and drugs to disinfect the entire root canal system. Areas where instruments are not used and the distal end of the root canal left untouched may have remnants of bacterial biofilm. It may be thought that even if the instrument does not reach all of the root canal walls, these areas are penetrated by the NaOCl solution used for irrigation, which may dissolve necrotic tissue residues and kill the remaining bacteria. In such a case, the irrigant should reach the area of the unused device at an effective concentration and flow rate and remain there for a sufficient time to become effective. Current instrumentation systems cannot predictably contact all root canal walls and reach these areas away from the main root canal. Therefore, there is an urgent need to develop strategies to improve infection control of the main root canal cavity and the entire root canal system.

Therefore, how to solve the above-mentioned deficiencies of the prior art is a problem to be solved by the present invention.

Disclosure of Invention

The utility model aims to provide a root canal flushing device with a back suction function.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a root canal flushing device with a suck-back function comprises a root canal flushing head and a suck-back needle tube, wherein the front end of the root canal flushing head is provided with an assembling port, and the suck-back needle tube is detachably assembled in the assembling port at the front end of the root canal flushing head;

the root canal flushing head comprises a rod-shaped body, and the rear end of the rod-shaped body is connected with a dental flushing device; a washing flow channel is arranged in the rod-shaped body along the length direction of the rod-shaped body, the front end of the washing flow channel is arranged at the front end of the rod-shaped body as a washing port, and the washing port is positioned at the rear side of the assembling port; the rear end of the flushing flow passage is communicated with a liquid outlet in the dental flushing device;

the suck-back needle tube comprises a needle part at the lower end and a tube part at the upper end, and internal flow channels of the two parts are communicated with each other; the lower end of the needle head part is a liquid suction end and extends into a root canal of a tooth; the rear end of the pipe body part is communicated with dental resorption equipment;

the front end of the root canal flushing head is bent upwards to form that the lower end of the needle head part is inclined forwards, and an included angle alpha is formed between the central line of the needle head part in the length direction and the central line of the rod-shaped body in the length direction;

the flushing port at the front end of the flushing flow channel is bent downwards, and an included angle beta is formed between the central line of the cross section of the flushing port and the central line of the length direction of the needle head part.

The relevant content in the above technical solution is explained as follows:

1. in the scheme, the included angle alpha is 20-90 degrees, the included angle beta is 20-90 degrees, and the included angle alpha plus the included angle beta is larger than or equal to 90 degrees;

the flushing pressure range of the flushing liquid is 5000-40000 psi, and the suck-back pressure range of the suck-back needle tube is 500-20000 psi; the diameter of the flushing opening is 50-800 microns.

Through the design of the angle and the flushing pressure, the flushing liquid can be sprayed to form an effective pressure range and a jet diameter, so that the pulp cavity is fully cleaned, and the liquid flow is prevented from damaging or eroding the inside of the pulp cavity;

through the setting of above-mentioned washing pressure and resorption pressure, can satisfy and effectively spray the guide to the pulp chamber of root canal with the flush fluid and clean in to help forming stable sustainable liquid backward flow route, can guarantee the cleaning performance, can avoid the injury again.

2. In the above-mentioned scheme, the dentistry washing unit is ultrasonic wave or sound wave scaler, the root canal is washed the head and is transmitted vibration extremely the resorption needle tubing carries out the ultrasonic wave to wash the root canal.

3. In the above scheme, the upper end of the needle head part of the suck-back needle tube is provided with a crown head part, and the tube body part is detachably connected to the crown head part of the needle head part.

4. In the above scheme, the coronal head of the needle part is bent backwards.

5. In the above scheme, the needle head part of the suck-back needle tube is an integral piece, and the distal end of the needle head part is provided with an opening;

the needle portion tapers along its length from a proximal end to a distal end and forms a funnel-shaped configuration at the proximal end of the needle portion.

6. In the above solution, the opening is located at the tip of the needle or at the lateral side of the needle.

7. In the scheme, the needle head part of the suck-back needle tube is an assembly formed by connecting a polymer cannula at the far end and a second polymer component at the near end; wherein the diameter of the polymeric cannula is less than the diameter of the second polymeric component.

8. In the above aspect, the second polymeric component has a tapered distal portion and a funnel-shaped configuration at a proximal portion.

9. In the scheme, the upper end of the needle head part of the suck-back needle tube is provided with two lateral wing-shaped protrusions.

The working principle and the advantages of the utility model are as follows:

the utility model relates to a root canal flushing device with a suck-back function, which comprises a root canal flushing head and a suck-back needle tube, wherein the root canal flushing head and the suck-back needle tube are detachably assembled; the root canal flushing head comprises a rod-shaped body, a flushing flow channel is arranged along the length direction of the rod-shaped body, the front end of the flow channel is a flushing port, and the rear end of the flow channel is communicated with a dental flushing device; the suck-back needle tube comprises a needle head part and a tube body part, wherein the lower end of the needle head part is a liquid suction end and extends into a root canal of a tooth; the rear end of the pipe body part is communicated with the dental resorption device; the front end of the root canal flushing head is bent upwards to form a forward inclined needle part, and the central line of the needle part in the length direction and the central line of the rod-shaped body in the length direction form an included angle alpha; the flushing port at the front end of the flushing flow channel is bent downwards, and an included angle beta is formed between the central line of the cross section of the flushing port and the central line of the needle head part in the length direction.

In contrast to the prior art, the present invention provides that activation of the irrigant solution can also be achieved with irrigation and evacuation of the root canal contents. Solves the problems existing in the prior art, namely the irrigation liquid is not delivered to one third of the root canal and is not activated enough, resulting in incomplete cleaning, and the irrigation liquid permeates into periapical tissues through pores, resulting in treatment complications.

The present invention provides a safer, cost-effective and efficient method for continuously delivering irrigation fluid without tip pressure while enabling activation of the irrigation fluid and safe evacuation thereof by negative pressure.

The needle part of the utility model is provided with a one-way continuous vacuum-pumping path which can generate negative pressure, so that the flushing liquid flows to the root apex of one third of the root canal and cannot be extruded.

Proper activation of the irrigating fluid is provided by applying ultrasonic vibration and energy to the needle portion. The use of ultrasonic energy allows irrigant to be delivered to the root canal at a low flow rate. As will be appreciated by those skilled in the art, the energy transferred to the irrigant, particularly sodium hypochlorite and EDTA, disrupts the microbial environment present in the root canal and dissolves organic tissue and other debris from the affected area, thereby achieving more effective endodontic treatment.

The root canal irrigation head automatically provides a continuous flow of irrigation fluid without the need for secondary assembly using a syringe or irrigation pump. The needle head part of the suck-back needle tube is disposable, so that the problems of cleaning and disinfection are solved, and cross infection is avoided.

Drawings

FIG. 1 is a first schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a second schematic structural diagram of an embodiment of the present invention;

FIG. 3 is a schematic flow diagram of an exemplary rinse solution of the present invention;

FIG. 4 is a schematic structural view of an embodiment of the present invention (tubeless part);

FIG. 5 is a schematic diagram of the working principle of an embodiment of the present invention;

FIG. 6 is a schematic view of the crown-shaped head of the present invention;

FIG. 7 is a schematic structural view of an integral needle portion of an embodiment of the present invention;

FIG. 8 is a schematic structural view of a combined needle portion according to an embodiment of the present invention;

FIG. 9 is a schematic cross-sectional view of FIG. 8;

FIG. 10 is a schematic structural view of another needle assembly according to an embodiment of the present invention;

FIG. 11 is an enlarged view taken at A in FIG. 10;

FIG. 12 is a schematic structural view of a needle assembly according to an embodiment of the present invention;

FIG. 13 is an enlarged view at B of FIG. 12;

FIG. 14 is a schematic structural view of a screw port as an assembling port according to an embodiment of the present invention;

fig. 15 is a schematic structural view showing a flexible section as a front section of a root canal irrigation head according to an embodiment of the present invention.

In the above drawings: 1. a root canal irrigation head; 2. a suck-back needle tube; 3. an assembly port; 4. a rod-shaped body; 5. a needle portion; 5a, a polymer cannula; a second polymeric component; 6. flushing the flow channel; 7. flushing the opening; 8. a tube body portion; 9. an internal flow passage; 10. root canals; 11. periapical tissue; 12. a coronal head; 13. an opening; 14. a wing-like protrusion; 15. a funnel-shaped structure; flexible segment 1 a.

Detailed Description

The utility model is further described with reference to the following figures and examples:

example (b): the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure may be shown and described, and which, when modified and varied by the techniques taught herein, can be made by those skilled in the art without departing from the spirit and scope of the disclosure.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms "a", "an", "the" and "the", as used herein, also include the plural forms.

As used herein, "connected" or "positioned" refers to two or more elements or devices being in direct physical contact with each other or in indirect physical contact with each other, and may also refer to two or more elements or devices being in operation or acting on each other.

As used herein, the terms "comprising," "including," "having," and the like are open-ended terms that mean including, but not limited to.

As used herein, the term (terms), unless otherwise indicated, shall generally have the ordinary meaning as commonly understood by one of ordinary skill in the art, in this written description and in the claims. Certain words used to describe the disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the disclosure.

The terms "upper" and "lower" used herein are directional terms, and are used only for describing the positional relationship between the structures, and are not intended to limit the protection schemes and the actual implementation directions.

Referring to fig. 1-4, a root canal flushing device with a back suction function comprises a root canal flushing head 1 and a back suction needle tube 2, wherein the front end of the root canal flushing head 1 is provided with an assembling port 3, and the back suction needle tube 2 is detachably assembled in the assembling port 3 at the front end of the root canal flushing head 1.

The root canal flushing head 1 comprises a rod-shaped body 4, and the rear end of the rod-shaped body 4 is detachably connected with a dental flushing device; a washing flow channel 6 is arranged in the rod-shaped body 4 along the length direction of the rod-shaped body, the front end of the washing flow channel 6 is arranged at the front end of the rod-shaped body 4 as a washing port 7, and the washing port 7 is positioned at the rear side of the assembling port 3; the rear end of the flushing flow passage 6 is communicated with a liquid outlet in the dental flushing device.

The suck-back needle tube 2 comprises a needle part 5 at the lower end and a tube part 8 at the upper end, and the internal flow passages 9 of the needle part and the tube part are communicated with each other; the lower end of the needle head part 5 is a liquid suction end and extends into a root canal 10 of a tooth; the rear end of the pipe body part 8 is communicated with dental resorption equipment. The dental suction back device is used to generate negative pressure and thus suction force, which facilitates the suction back of the contents (liquid, debris, etc.) in the root canal 10 by the suction needle tube 2.

The internal flow passage 9 provides a single continuous, uninterrupted flow path for the aspiration of the contents of the root canal 10.

The front end of the root canal flushing head 1 is bent upwards to form that the lower end of the needle head part 5 inclines forwards, and an included angle alpha is formed between the central line of the needle head part 5 in the length direction and the central line of the rod-shaped body 4 in the length direction.

The flushing port 7 at the front end of the flushing flow channel 6 is bent downwards, and an included angle beta is formed between the central line of the cross section of the flushing port 7 and the central line of the needle head part 5 in the length direction.

As shown in fig. 5, the flushing flow passage 6 of the root canal flushing head 1 discharges liquid under positive pressure, the flushing liquid enters the root canal 10 and flushes the root canal 10, and simultaneously, the needle head part 5 of the suck-back needle tube 2 goes deep into the root canal 10 to suck back under negative pressure, thereby forming a one-way cleaning loop. The irrigant solution is moved in a dynamic unidirectional motion from the pulp chamber at the upper part of the root canal 10 to the apical root at the lower part. The root tip is the lower third of the length of the root canal 10. The one-way motion of developments refers to the one-way route in the flush fluid is washed into the pulp chamber from the root canal mouth and is followed the apex department back by the negative pressure resorption to resorption needle tubing 2, and the negative pressure imbibition can make the tip of resorption needle tubing 2 needle section 5 carry out the liquid evacuation to the apex portion of root canal 10 below, helps guiding the flush fluid to flow below from the root canal 10 top, improves clean effect, and the flush fluid also can not reach the bottommost of apex, has avoided permeating to apex week portion tissue 11 through the aperture in, leads to the treatment complication. Thus ensuring the effects of flushing and back suction and avoiding the damage to the root tip and the gum.

Preferably, the included angle alpha is 20-90 degrees, the included angle beta is 20-90 degrees, and the included angle alpha + the included angle beta is larger than or equal to 90 degrees; the flushing pressure range of the flushing liquid is 5000-40000 psi, and the suck-back pressure range of the suck-back needle tube is 500-20000 psi; the diameter of the flushing opening is 50-800 microns.

Through the design of the angle and the flushing pressure, the flushing liquid can be sprayed to form an effective pressure range and a jet diameter, so that the pulp cavity is fully cleaned, and the liquid flow is prevented from damaging or eroding the inside of the pulp cavity; through the setting of above-mentioned washing pressure and resorption pressure, can satisfy and effectively spray the guide to the pulp chamber of root canal with the flush fluid and clean in to help forming stable sustainable liquid backward flow route, can guarantee the cleaning performance, can avoid the injury again.

Preferably, the dental irrigation device is an ultrasonic or sonic scaler, and the root canal irrigation head 1 transmits vibration to the suck-back needle tube 2 to ultrasonically wash the root canal 10. The energy generated by the ultrasonic or sonic scaler is converted into vibrations of the root canal irrigator for optimal cleaning of the root canal 10 by the return needle cannula 2. The root canal irrigation head 1 continuously feeds the irrigation solution to the root canal 10 while the needle portion 5 is vibrated in the root canal 10, thereby activating the irrigation solution.

The mechanical, sonic or ultrasonic activation of the irrigant solution during the therapeutic cleaning of the root canal 10 shows a good effect in enhancing the disinfection and is effective in removing tissue residues and bacterial biofilms in areas where the instruments are not used after the treatment of the root canal 10.

As shown in FIG. 4, the needle portion 5 of the suck back needle cannula 2 has a crown-shaped head 12 at the upper end thereof, and the tubular body portion 8 is detachably connected to the crown-shaped head 12 of the needle portion 5. The design can realize the disposable use of the needle part 5 and is convenient for replacement. When the needle head part is replaced, the lower tube part 8 is taken out firstly, and then the needle head part 5 is taken out and replaced, so that the needle head is sanitary, and the overall replacement cost is reduced.

Preferably, as shown in fig. 6, the coronal head 12 of the needle portion 5 can be bent backward to form the tubular body portion 8 and extend backward in combination therewith, so as to avoid interference during the irrigation of the root canal 10. Alternatively, the tubular body 8 of the suck-back needle tube 2 may be bent back into a bent tube to avoid interference during the flushing of the root canal 10.

As shown in fig. 7, the needle portion 5 of the suck back needle tube 2 is a single piece, and the distal end of the needle portion 5 has an opening 13; the needle portion 5 is tapered from a proximal end to a distal end along its length, forming the needle portion 5 as a substantially cylindrical tubular structure, and forming a funnel-shaped structure 15 at the proximal end of the needle portion 5.

The diameter of the needle is 0.35 plus or minus 0.25 mm.

Preferably, said needle portion 5 has two lateral wing-like projections 14 at its upper end. The funnel-shaped design of the proximal end of the needle part 5 can facilitate the assembly of the suck-back needle tube 2 into the assembly opening 3 of the root canal flushing head 1.

As shown in fig. 8 and 9, in some embodiments, the needle portion 5 of the back-suction needle cannula 2 is an assembly comprising a polymer cannula 5a at the distal end and a second polymer member 5b at the proximal end; wherein the diameter of the polymer cannula 5a is smaller than the diameter of the second polymer part 5 b. The connection means includes chemical attachment, medical grade glue bonding or overmolding.

Wherein, as shown in fig. 10 and 11, the distal portion of the second polymeric component 5b may be tapered and have a funnel-shaped configuration 15 at the proximal portion.

The opening 13 of the needle part 5 may be located at the tip of the needle, as shown in fig. 7, or at the lateral side of the needle, as shown in fig. 12, 13. The openings 13 are used to remove debris and impurities in the root canal 10, and when the openings 13 are provided at the side, one or more openings may be provided at intervals in the circumferential direction.

As shown in fig. 14, in some embodiments, the needle portion 5 may be threadedly engaged with the mounting port 3 of the root canal irrigation head 1.

As shown in fig. 15, in some embodiments, the front section of the root canal flushing head 1 may also be provided with a flexible section 1 a. Flexibility can be achieved by known polymer materials to weaken the vibration conduction of the needle portion 5 and the root canal irrigation head 1, so that the needle portion 5 is not activated by ultrasonic or sonic equipment, but does not affect its normal negative pressure suction function.

Preferably, the needle portion 5 of the back-suction needle cannula 2 may be made of a polymer selected from any one of the following materials: polypropylene polymers, polyethylene polymers, polyetheretherketones, polycarboxylates, amorphous thermoplastic polyetherimides; in addition, polymer alloys or composites of polycarbonate and polybutylene terephthalate Xenoy resin, copolymer of polycarbonate and isophthalate terephthalate resorcinol resin Lexan plastic, liquid crystal polymer or any other suitable resin plastic or composite of sufficient strength at smaller diameters may be used.

The needle portion 5 of the present invention has a one-way continuous vacuum path (i.e., internal channel 9) to create a negative pressure that causes irrigation fluid to flow to the apex of one third of the root canal 10 without being squeezed out.

By applying ultrasonic vibrations and energy to the needle portion 5, a proper activation of the irrigation liquid is provided. The use of ultrasonic energy allows irrigant solution to be delivered to the root canal 10 at a low flow rate. As will be appreciated by those skilled in the art, the energy transferred to the irrigant, particularly sodium hypochlorite and EDTA, disrupts the microbial environment present within the root canal 10 and dissolves organic tissue and other debris from the affected area, thereby achieving more effective root canal treatment.

In addition, the root canal irrigation head 1 automatically provides a continuous flow of irrigation fluid, eliminating the need for a syringe or an irrigation pump for secondary assembly. The needle head part 5 of the suck-back needle tube 2 is disposable, so that the problems of cleaning and disinfection are solved, and cross infection is avoided.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a take root canal washing unit of suck-back function which characterized in that:

the device comprises a root canal flushing head and a resorption needle tube, wherein the front end of the root canal flushing head is provided with an assembly port, and the resorption needle tube is detachably assembled in the assembly port at the front end of the root canal flushing head;

2. The root canal irrigation device with back suction function according to claim 1, characterized in that: the included angle alpha is 20-90 degrees, the included angle beta is 20-90 degrees, and the included angle alpha plus the included angle beta is more than or equal to 90 degrees;

3. The root canal irrigation device with back suction function according to claim 1, characterized in that: the dental flushing device is an ultrasonic or acoustic scaler, and the root canal flushing head transmits vibration to the resorption needle tube to perform ultrasonic oscillation washing on the root canal.

4. The root canal irrigation device with back suction function according to claim 1, characterized in that: the upper end of the needle head part of the suck-back needle tube is provided with a crown head part, and the tube body part is detachably connected with the crown head part of the needle head part.

5. The root canal irrigation device with back suction function according to claim 4, wherein: the coronal head of the needle portion is bent backwards.

6. The root canal irrigation device with back suction function according to claim 1, characterized in that: the needle head part of the suck-back needle tube is an integral piece, and the distal end of the needle head part is provided with an opening;

7. The root canal irrigation device with back suction function according to claim 6, wherein: the opening is located at a tip at the needle, or at a lateral side at the needle.

8. The root canal irrigation device with back suction function according to claim 1, characterized in that: the needle head part of the suck-back needle tube is an assembly formed by connecting a polymer cannula at the far end and a second polymer component at the near end; wherein the diameter of the polymeric cannula is less than the diameter of the second polymeric component.

9. The root canal irrigation device with back suction function according to claim 8, wherein: the second polymeric component has a tapered distal portion and a funnel-shaped configuration at a proximal portion.

10. The root canal irrigation device with back suction function according to claim 1, characterized in that: the upper end of the needle head part of the suck-back needle tube is provided with two lateral wing-shaped protrusions.