CN111134873A - But suction device and dentistry root canal negative pressure towards suction system of individualized adjustment - Google Patents

Abstract

The invention discloses a suction device capable of being adjusted individually, which is configured to be connected to a negative pressure supply device related to an oral treatment device so as to suck and remove liquid by means of negative pressure at the required occasion. The suck-back device includes a first tubular portion, a second tubular portion, and a branch tube portion, a first end portion of the first tubular portion being connected to a first end portion of the second tubular portion such that the first tubular portion communicates with the second tubular portion, the branch tube portion extending from the first tubular portion and communicating with the first tubular portion, a free end having an opening on the branch tube portion being configured to be connectable to a negative pressure providing device. At least the second tubular portion is configured to be individually adjustable in length. The invention also provides a negative pressure flushing and sucking system for the dental root canal based on the back suction device. The invention realizes the personalized adjustment aiming at different damage degrees of teeth, different lengths of root canals and different lengths of the flushing needle head, improves the treatment effect and lightens the operation burden of doctors.

Description

But suction device and dentistry root canal negative pressure towards suction system of individualized adjustment

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a back suction device and a dental root canal negative pressure flushing and sucking system with the back suction device.

Background

Endodontic and periapical diseases are common and frequently encountered diseases in the stomatology department. Root canal therapy is the most common and effective treatment for endodontic and periapical diseases internationally. The principle of endodontics is to remove infectious agents from the root canal mechanically and chemically, and to prevent the occurrence of periapical lesions or to promote the healing of already occurring periapical lesions by filling the root canal, closing the crown. The root canal treatment process can be simplified into three parts of root canal formation, root canal flushing and root canal filling. Among them, mechanical preparation is also called root canal formation, and simultaneously plays a role of mechanical cleaning, and chemical preparation is also called root canal irrigation.

In root canal treatment, elimination of bacteria is most important, otherwise the root canal may become a good environment for bacterial growth. Due to the complexity of the root canal system, 35% of the canal wall surface remains unprepared after root canal cleaning and shaping, rendering mechanical preparation incapable of completely removing the source of infection. Frequent, extensive irrigation (i.e., chemical preparation) is necessary, otherwise mechanically prepared morsels, bacteria, residual pulp tissue, etc. push out the apical foramen, causing intra-and post-operative pain, affecting prognosis; a large amount of pulp tissue and bacterial biofilm remain in an area that cannot be reached by the mechanical preparation, and this causes failure of root canal treatment.

The current flushing mode can not only flush but also suck back completely, especially, a large amount of bleeding still exists in the root canal after pulpitis is extracted, the operation visual field is fuzzy, a doctor needs to flush repeatedly and then suck saliva, partial blow-drying is needed, the operation is complex, time and labor are wasted, the saliva of a patient and the blood containing bacteria in the root canal splash, and cross contamination is easy to form. In the restoration of the pile crown after the root canal treatment, it is difficult to thoroughly clean the disinfectant or acid etchant injected into the canal.

In addition, the pushing pressure and flow rate of the liquid are not easy to control in the traditional manual syringe flushing mode; the operation cannot be standardized; it is possible to push chippings, bacteria, residual pulp tissue, etc. out of the apical foramen, which is a safety deficiency, resulting in pain in the patient during and after surgery; the flushing liquid can not be heated, and the flushing effect is not good; the flushing fluid can not be removed in time, has certain irritation to mucous membrane and periodontal, has potential medical safety hazard, and has fuzzy operation visual field, which affects the treatment efficiency of doctors.

The working position of a suck-back device of a negative pressure irrigation system in the foreign market at present is placed at a dental crown part, but not at a root canal orifice, and the working position is not adjustable and is not suitable for the dental crown and the tooth with large tooth root defect; some negative pressure irrigation system resorption device's sleeve pipe is placed the apical part in the root canal, but the sleeve pipe is thick, still must prepare root canal machinery to 0.35mm thickness, just can use after the 0.04 tapering, can't use in root canal machinery prepares the in-process, uses inconvenient moreover, needs to change many times and washes the sleeve pipe.

Disclosure of Invention

In view of the problems in the prior art, it is an aspect of the present invention to provide a suction device capable of being individually adjusted, which is configured to be connected to a negative pressure providing device associated with an oral treatment apparatus so as to suck and remove liquid by means of negative pressure at a desired occasion. The suck-back device includes a first tubular portion having a first end connected to a first end of a second tubular portion so that the first tubular portion communicates with the second tubular portion, a second tubular portion having a first end connected to a second end of the first tubular portion, and a branch tube portion extending from the first tubular portion and communicating with the first tubular portion, the branch tube portion having an open free end configured to be connectable to the negative pressure supply device. At least the second tubular portion is configured to be individually adjustable in length.

Preferably, the second end of the first tubular portion is provided with a closure member which is resilient and configured such that a medical needle can penetrate the closure member into the first tubular portion and/or the second tubular portion.

Preferably, the closure member is selected from a rubber stopper and/or a latex stopper.

Preferably, the length of the first tubular portion is no more than 8 mm.

Preferably, the second tubular portion is of a tubular structure of uniform diameter, with an outer diameter not exceeding 5 mm.

Preferably, the second end of the second tubular portion is configured to be pressed to abut against and adhere to a predetermined portion to be treated, so that liquid can flow into the second tubular portion through an opening of the second end of the second tubular portion and be discharged through the branch tube portion.

Preferably, the branch pipe portion is inclined toward the second end of the first tubular portion.

In another aspect, the present invention also provides a dental root canal negative pressure flushing and sucking system, comprising: the liquid supply conduit is used for supplying liquid to the flushing needle head and is constructed in a manner that a first end of the liquid supply conduit is connected with the flushing needle head, and the handheld part is sleeved on the periphery of the liquid supply conduit and is used for being held by an operator. The suckback device is sleeved on the outer peripheral side of the irrigation needle and can be connected with an external negative pressure supply device through the branch pipe part, so that a pipeline for liquid circulation is formed in a space between the inner side wall of the suckback device and the outer side wall of the irrigation needle, and the second end part of the second tubular part is used for abutting against a root canal orifice, so that liquid flowing out through the irrigation needle can be sucked and discharged from the root canal orifice through the pipeline by means of negative pressure.

Preferably, the dental root canal negative pressure flushing and sucking system is further provided with a pressurizing device connected to the second end of the liquid supply conduit and used for applying pressure for pushing liquid to the liquid supply conduit and further to the flushing needle. The hand-held part is provided with a switch for controlling the operation of the pressurizing device.

Preferably, the dental root canal negative pressure flushing and sucking system is further provided with a pressurizing device and a heating device, wherein the pressurizing device is connected to the second end of the liquid supply conduit and is used for controllably applying pressure for pushing liquid to the liquid supply conduit and further to the flushing needle head, and the heating device is used for heating and preheating the liquid supplied to the liquid supply conduit to a preset temperature. The hand-held part is provided with a switch which is used for controlling the operation of the pressurizing device and/or the warming device.

The back suction device and the dental root canal negative pressure flushing and sucking system solve the problems that the existing negative pressure flushing system is not suitable for large damaged teeth, is inconvenient to use and cannot automatically and controllably pressurize and heat.

The length of the suck-back device is adjustable, the mounting position of the suck-back device relative to the flushing needle is adjustable, namely the working position is adjustable, and the suck-back device can be individually adjusted according to different lengths of teeth and root canals, the damage degree of tooth crowns and tooth roots and different lengths of the flushing needle. Therefore, the back suction device and the dental root canal negative pressure flushing and sucking system can be suitable for root canals or a plurality of teeth with different lengths of the same posterior tooth, and the back suction device does not need to be replaced when the plurality of root canals or the plurality of teeth are treated, so that the operation time of a doctor is saved.

In the negative pressure flushing and sucking system for the dental root canal, the back suction device with the structure is arranged on the periphery of the needle head, the second end part of the second tubular part of the back suction device is abutted against the root canal mouth during diagnosis and treatment, flushing and instantaneous back suction of flushing liquid can be completed by using one-man one-hand operation of one instrument, the operation visual field is clear, and the operation time beside a chair is shortened (namely, the time for patients to see a doctor is shortened). In addition, the back suction device can quickly remove the flushing liquid from the root canal orifice by means of negative pressure, so that the flushing liquid containing NaCIO is prevented from overflowing to the oral mucosa from the root canal orifice, the irritation of NaCIO to the oral mucosa is reduced, and the flushing safety is improved. The negative pressure suck-back also produces the negative pressure in the apical area of root canal, avoids pushing out the apical pore with bits of broken bits and flush fluid etc. in the root canal preparation, reduces the pain in the art and after operation, further improves the security and the effect of treatment.

In addition, in the dental root canal negative pressure flushing and sucking system, the heating device is arranged to preheat the flushing liquid, so that the sterilization capability of the flushing liquid and the capability of dissolving residual dental pulp are improved, and the treatment effect is improved; the adjustable automatic pressurizing device is arranged, so that the controllability and the adjustability of the flow rate of the flushing pressure are realized, the problems of instability and difficulty in control of manual pressurization are solved, the flushing safety is improved, the operation standardization degree is high, and the operation burden of a doctor is reduced.

Therefore, the back suction device with the structure and the dental root canal negative pressure flushing and sucking system can realize flushing and instantaneous back suction, effectively activate flushing fluid, play the physical cleaning role of the flushing fluid, improve the medical safety, ensure clear operation visual field, save back suction time and reduce the operation time beside a chair. The operation is simple and convenient, and can be completed by one hand of one person, thereby having good popularization value.

Drawings

FIG. 1 is a schematic view of an exemplary flashback device of the present invention, showing an irrigation needle and a flashback device about to be assembled or connected.

Fig. 2 is a diagram showing the use of the exemplary dental root canal negative pressure suction and flushing system of the present invention in the treatment of mandibular first permanent molars from a mesial tooth body defect to the cervical rim with periapicalitis in example 1.

In the figure: 1-a first tubular part, 2-a second tubular part, 3-a branch pipe part, 4-a sealing component, 5-a suck-back device, 6-a wash-suction needle, 7-a wash-suction needle tail part, 8-a liquid supply catheter, 9-a handheld part, 10-a pipe orifice, 11-a pressurizing device, 12-a heating device, 13-a switch, 14-a speed regulation knob, 15-a connector, 16-a tooth neck margin line and 17-an indication silica gel sheet.

Detailed Description

The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, and the embodiments are merely illustrative of the technical solutions of the present invention, and the scope of the present invention is not limited thereto.

Figure 1 illustrates an exemplary suck back device of the present invention. The suck-back means 5 is suitable for connection to a negative pressure supply means associated with an oral treatment apparatus (e.g. a dental treatment chair) or a separate negative pressure supply means for suction removal of liquid by means of negative pressure where required.

As shown in fig. 1, the suck-back device 5 includes a first tubular portion 1, a second tubular portion 2, and a branch pipe portion 3. The first end of the first tubular part 1 is connected with the first end of the second tubular part 2 such that the first tubular part 1 is in close connection and fluid communication with the second tubular part 2. The first tubular part 1 and the second tubular part 2 may be separate parts or may be integrally formed, preferably integrally formed. The branch pipe portion 3 extends outward from the side of the first tubular portion 1 and communicates with the first tubular portion 1.

The upstream end (i.e., the second end) of the first tubular portion 1 is provided with a closing member 4. The closure member 4 is resilient and configured such that a medical needle (e.g. an irrigation needle 6) can penetrate through the closure member 4 into the inner space of the first and second tubular portions 1, 2.

The closure member 4 is preferably selected from a rubber stopper or a latex stopper. Due to the resilience and sealing properties of the rubber or latex stopper, even if the irrigation needle 6 pierces the closure member 4, the irrigation needle 6 itself blocks the puncture hole, so that a good closure or seal can be formed for the second end of the first tubular portion 1, so that no liquid can flow or leak from the second end. In addition, when a medical needle such as the flushing needle 6 penetrates the closing member 4 and enters the suck-back device 5, the length of the needle tube of the flushing needle 6 entering the internal space of the suck-back device 5 can be flexibly adjusted by applying force to the suck-back device 5 or the flushing needle 6 to move, and when the length of the needle tube entering the internal space of the suck-back device 5 reaches a preset proper length, the relative position of the suck-back device 5 and the flushing needle 6 can be stably maintained by stopping applying force. That is, the closing member 4 forms a closure or seal against the opening of the second end of the first tubular portion 1 on the one hand so that liquid does not flow out of this end, and on the other hand firmly positions the irrigation needle 6 and the suck back device 5 relative to each other when assembling the irrigation needle 6 and the suck back device 5. Therefore, on one hand, the purpose of flexibly adjusting the working position of the back suction device 5 is achieved, on the other hand, the stable positioning of the back suction device 5 relative to the position to be diagnosed is ensured during treatment, and therefore the purpose of individually adjusting the working length of the back suction device for different patients or affected teeth is achieved.

The closing member 4 is located on the first tubular portion 1 upstream of the point where the branch pipe portion 3 extends, and is configured not to obstruct communication between the first tubular portion 1 and the branch pipe portion 3 while forming a close to the second end portion of the first tubular portion 1. After the back suction device 5 is assembled with the irrigation needle 6, the closure member 4 is located between the irrigation needle tail 7 and the point where the branch tube portion 3 extends. In order to enhance the positioning stability, two adjacent closing members 4 may be provided.

The second end of the second tubular part 2 is provided with an opening configured to abut to a location to be treated, such as the periphery of the root canal orifice 10, the edge of the opening being flexibly deformable to conform to the periphery of the root canal orifice 10 such that the gap between the second end and the periphery of the root canal orifice 10 is as small or even as small as possible, so that little or no liquid can flow or leak from the gap.

The first tubular portion 1 and/or the branch pipe portion 3 may be configured in a tubular structure having a uniform diameter, or in a tapered pipe structure having a gradually decreasing diameter, specifically, the diameter of the first tubular portion 1 is gradually decreased from the second end portion toward the first end portion, and the diameter of the branch pipe portion 3 is gradually decreased from the extension starting point thereof toward the free end. The length L (see fig. 1) of the first tubular part 1 does not exceed 8mm, preferably 3.5-5.5mm, and the smaller the length of the first tubular part 1, the better it is for the purpose of not obstructing the operator's view, without affecting the manufacturability of the product. The outer diameter and the inner diameter of the first tubular portion 1 are not particularly limited, and the outer diameter of the first tubular portion 1 is as small as possible without affecting the manufacturability of the product in order to prevent the operator from viewing the field of view. The inner diameter of the first tubular part 1 is particularly the first end of the first tubular part (i.e. the part connected to the second tubular part) and the part of the first tubular part in communication with the branch pipe part, the larger the inner diameter the better to ensure a large suction force and a fast removal of waste liquid.

The second tubular portion 2 is of a tubular configuration of uniform diameter. The length of the second tubular portion 2 is not particularly limited. The second end of the second tubular part 2 (i.e. the end abutting the treatment site) has an outer diameter of no more than 5mm, preferably no more than 3mm, no more than 3.5mm or no more than 4 mm. The larger the inner diameter of the second tubular part 2, the better it is without affecting the manufacturability of the product, to ensure that the suction force is large and the waste liquid can be removed quickly.

The first tubular part 1 and the second tubular part 2 are constructed to be adjustable in length, and they may be flexible so as to be deformable to adapt to the shape of a pre-bent irrigation needle 6 (see fig. 2). The first tubular part 1 and/or the second tubular part 2 are configured to be adjustable in length by cutting. In this case, the back suction device can be individually adjusted according to different lengths of the tooth and root canal and different destruction degrees of the tooth root of the patient's crown and different lengths of the irrigation needle, the second end of the second tubular part 2 being in close abutment to the periphery of the radicular orifice 10, thus ensuring an effective negative pressure suction.

The first tubular part 1, the second tubular part 2 and/or the branch tube part 3 may be, for example, but not limited to, latex tubes, silicone rubber tubes, medical PVC hoses or medical tubes made of polypropylene. The second tubular portion 2 is preferably transparent or translucent, the higher the transparency the better. The branch tube part 3 is preferably configured such that a portion near the joint 15 (see fig. 2) is transparent or translucent, and the higher the transparency, the better.

The branch pipe portion 3 is preferably inclined toward the second end of the first tubular portion 1 at an angle preferably in the range of 0 ° to 90 °, and the smaller the angle of inclination, the smaller the resistance to the flow of the liquid being drawn back toward the negative pressure direction, and the larger the negative pressure suction force.

The opening of the free end of the branch pipe part 3 is provided with a connector 15 for connecting an external negative pressure supply device. The liquid entering the branch pipe portion 3 is sucked and removed by the negative pressure provided by the negative pressure providing means. The negative pressure providing device can be a strong suction or a weak suction of the dental treatment table, or a central negative pressure suction system, or a separate negative pressure providing device.

A speed regulating knob 14 is arranged on the branch pipe part 3 and at the upstream position of the interface 15 and used for regulating the pipe diameter of the branch pipe part 3 and further regulating the flow velocity of negative pressure suction according to actual requirements.

Based on the back suction device, the invention also provides a dental root canal negative pressure flushing and sucking system. As shown in fig. 2, the dental root canal flushing and sucking system mainly comprises a flushing needle 6, a liquid supply conduit 8, a hand-held part 9 and a back suction device 5, and further preferably comprises a pressurizing device 11 and a warming device 12.

The first end (i.e. the outlet end) of the liquid supply duct 8 is connected to the tail 7 of the irrigation needle 6. In order to prevent decomposition of NaClO contained in the endodontic solution by light when passing through the liquid supply conduit 8, the liquid supply conduit 8 is preferably a brown pipe.

The handle portion 9 is looped around or wrapped around the outer periphery of the liquid supply duct 8 for gripping by an operator. Also, the hand-held portion 9 is preferably opaque to light in order to prevent decomposition of NaClO contained in the root canal irrigation solution by light.

The suck-back device 5 is fitted on the outer circumference of the irrigation needle 6 and can be connected to an external negative pressure supply device. The space formed between the inner side wall of the suck-back means 5 and the outer side wall of the irrigation needle 6 constitutes a channel for the fluid communication, through which channel the fluid flowing out through the irrigation needle 6 can be discharged by means of suction under negative pressure.

In order to be able to perform individual pressure regulation and control for different types and opening manners of irrigation needles and different patients and to push liquid (e.g. irrigation liquid) at a constant speed, a pressure-controllable automatic pressurizing device 11 may be provided in the dental root canal negative pressure irrigation system. The pressurizing means 1 is connected to the second end (i.e. the inlet end) of the liquid supply conduit 8 for applying a constant liquid pushing pressure to the liquid supply conduit 8 and thus to the irrigation needle 6, so that liquid can be automatically pushed to the working length of the root canal. The pressurizing means 11 is preferably a pressure pusher, the pushing pressure being settable according to the actual requirements. Examples of pressurizing devices that can be used in the present invention include various laboratory micropumps or syringe impellers known to those skilled in the art, such as the syringe impeller model V2 manufactured by zibo cheng electronics.

A temperature-controllable automatic warming device 12 is also provided in the dental root canal negative pressure suction system, and the warming device 12 is used for warming the liquid (e.g., irrigation liquid) supplied to the liquid supply conduit 8 so as to preheat the liquid to a predetermined temperature. Warming device 12 may be any suitable heating device known to those skilled in the art, examples of which may be used in the present invention include fully automatic temperature controlled smart heaters manufactured by siemens. The temperature adjustment range of the heating device 12 is preferably 35 to 60 ℃.

The hand-held portion 9 is provided with a switch 13 for controlling the pressurizing means 11 and/or the warming means 12. When the switch 13 is turned on, the pressurizing means 11 starts to perform the pushing pressurization according to the pressure preset or adjusted by the operator, and the liquid in the liquid supply conduit 8 moves towards the irrigation needle 6 under the pressure and finally enters the predetermined area to be treated (for example, the root canal). When the switch 13 is closed, the pressurizing device 11 stops pushing and pressurizing, and the liquid stops moving toward the direction of the washing needle 6. The automatic pressurizing device 11 replaces manual pushing of an operator, so that liquid can be pushed at a constant speed under fixed pressure, the pushing is more accurate than manual control, the pushing pressure can be adjusted according to actual needs, and thus, the affected part can be treated/flushed more safely, excessive pressure cannot be generated at the root tip, and pain of a patient in and after operation is relieved.

In the dental root canal negative pressure flushing and sucking system, the back suction device 5 is sleeved on the outer peripheral side of the flushing needle 6. As shown in fig. 2, the entire first tubular part 1 and all or a part of the second tubular part 2 of the suck back device 5 are housed in the irrigation needle 6, accommodating at least a part of the irrigation needle 6 in their inner space.

The second end of the first tubular part 1 is closed by the resilient closing member 4 so that there is no gap between the second end and the irrigation needle 6, so that no liquid can escape or leak from between the second end of the first tubular part 1 and the irrigation needle 6.

The second end of the second tubular part 2 is configured to be in close abutment with a desired position of the region to be treated (e.g., the root canal orifice of the tooth to be treated), so that the tip portion of the irrigation needle 6 can be exposed and so that the liquid (e.g., irrigation liquid) in the root canal of the tooth to be treated can flow into the second tubular part 2 from the opening of the second end of the second tubular part 2 and then be discharged through the branch tube part 3.

An embodiment of the above-mentioned dental root canal negative pressure suction and flushing system applied to the treatment of dental diseases is described below with reference to fig. 2, so as to further help those skilled in the art understand the technical solution of the present invention.

Example 1

For purposes of clarity, the tooth and the suck back device are shown in fig. 2 on a larger scale than the rest of the dental root canal suction system.

This example relates to the case of mandibular first permanent molars with periapicalitis, large defects in the affected tooth, and destruction of the mesial root to the cervical ridge 16, as shown in figure 2. The tooth defect of the affected tooth is large, and the second tubular part 2 of the suck-back device 5 needs to have a large length.

The suck back device 5, which is formed by the first tubular part 1 and the second tubular part 2, is assembled with the irrigation needle 6 in the direction indicated by the arrow in fig. 1, wherein the irrigation needle 6 pierces the closure member 4 and protrudes from the first tubular part 1 and the second tubular part 2 over a desired predetermined length. The entire suck back device 5 is assembled and positioned relative to the irrigation needle 6 only by the closing member 4, and by virtue of the elasticity of the closing member 4 (e.g. a rubber plug), the entire suck back device 5 can be either moved relative to the needle of the irrigation needle 6 when needed or fixed in place.

When the dental root canal flushing and sucking system of the present invention is used for flushing, first, the longitudinal length of the suck-back means 5 is determined according to the length of the flushing needle 6 and the length of the root canal of the tooth, whereby the length of the second tubular part 2 is adjusted to an appropriate length by means of, for example, cutting.

The inlet end of the tail portion 7 of the irrigation needle 6 is connected to a first end portion (i.e. the outlet end) of a liquid supply duct 8, which is sleeved with a hand-held portion 9, while a second end portion (i.e. the inlet end) of the liquid supply duct 8 is connected to an adjustable automatic pressurizing device 11, and an adjustable heating device 12 is mounted with respect to the liquid supply duct 8 so as to heat liquid supplied to the liquid supply duct 8. The adjustable automatic pressurizing means 11 and the adjustable warming means 12 are operatively connected to a switch 13 on the hand-held portion 9. The branch pipe part 3 of the back suction device 5 is connected with the strong suction of the oral treatment chair (as a negative pressure supply device) through the interface 15.

During treatment, an operator puts the flushing needle 6 in the assembled dental root canal flushing and sucking system into the root canal, and the length indication silica gel sheet 17 indicates the working length of the flushing needle 6 placed in the root canal. At this time, the second end of the second tubular part 2 of the suck-back device 5 abuts against the position of the rhizobial orifice 10. The operator presses the switch 13 on the hand-held portion 9, and the warming device 12 preheats the flushing liquid, and simultaneously the pressure device 11 automatically pressurizes the flushing liquid in the liquid supply conduit 8, drives the flushing liquid to flow through the liquid supply conduit 8 and the flushing needle 6 and then is pushed to the root canal working length, and flushes the position of the root tip 1/3. At the same time of rinsing, the rinsing liquid after rinsing flows into the branch pipe portion 3 via the second tubular portion 2 and the first tubular portion 1 by the strong suction of the oral treatment chair, and is discharged from the suck-back device 5. The direction of fluid flow during irrigation and back-suction during treatment is shown by the arrows in fig. 2.

Since the length of each root canal is usually different, the depth of the needle cannula of the irrigation needle 6 into the root canal is different when changing to another root canal after completion of the irrigation of one root canal, i.e. the position of the root canal relative to the tooth needs to be changed. The suck back device 5 together with the closure member 4 is thus slid along the longitudinal axis of the needle cannula until the second end of the second tubular part 2 abuts the rhizobial port, a length cut out of the second end of the second tubular part 2 being used if necessary to change the position of the suck back device 5 relative to the teeth and/or the irrigation needle 6, and the irrigation is then continued. Through carrying out nimble position and length individualized adjustment to the suck-back device 5, can utilize one set of suck-back device 5 and wash syringe needle 6 to accomplish the washing of the root canal of same tooth different length, convenient and fast.

The foregoing detailed description and drawings are merely illustrative of the present invention for the purpose of facilitating a better understanding of the concepts of the invention, and are not intended to limit the scope of the invention. Variations of the invention may be made by those skilled in the art without departing from the spirit of the invention. Any modification or variation made without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. A suction device capable of being individually adjusted, which is configured to be connected to a negative pressure supply device associated with an oral treatment apparatus so as to aspirate and remove liquid by means of negative pressure where necessary, characterized in that:

the suck-back device (5) comprising a first tubular portion (1), a second tubular portion (2), and a branch tube portion (3), a first end portion of the first tubular portion (1) being connected to a first end portion of the second tubular portion (2) such that the first tubular portion (1) is in communication with the second tubular portion (2), the branch tube portion (3) extending from the first tubular portion (1) and being in communication with the first tubular portion (1), a free end of the branch tube portion (3) having an opening configured to enable connection to the negative pressure providing device,

at least the second tubular portion (2) is configured so as to be individually adjustable in length.

2. The suck back device of claim 1, wherein: the second end of the first tubular part (1) is provided with a closure member (4), the closure member (4) being resilient and configured such that a medical needle can penetrate the closure member (4) into the first and/or second tubular part.

3. The suck back device of claim 2, wherein: the closure member (4) is selected from a rubber stopper and/or a latex stopper.

4. The suck back device of claim 1, wherein: the length of the first tubular portion does not exceed 8 mm.

5. The suck back device of claim 1, wherein: the second tubular part (2) is of a tubular structure with uniform diameter, and the outer diameter of the second tubular part is not more than 5 mm.

6. The suck back device of claim 1, wherein: the second end of the second tubular part (2) is configured to be pressed to abut and be attached to a predetermined part to be diagnosed, so that liquid can flow into the second tubular part (2) through the opening of the second end of the second tubular part (2) and be discharged through the branch pipe part (3).

7. The suck back device of claim 1, wherein: the branch pipe portion (3) is inclined toward the second end of the first tubular portion (1).

8. A dental root canal negative pressure flushing and aspirating system, comprising: an irrigation needle (6), a liquid supply duct (8), a hand-held part (9) and a suck-back device according to any of claims 1 to 7, the liquid supply duct (8) being adapted to supply liquid to the irrigation needle (6) and being configured to be connected at a first end thereof to the irrigation needle (6), the hand-held part (9) being looped around the liquid supply duct (8) for gripping by an operator,

the suck-back device (5) is sleeved on the outer periphery of the flushing needle (6) and can be connected with an external negative pressure supply device through the branch pipe part (3), so that a pipeline for liquid circulation is formed in a space between the inner side wall of the suck-back device (5) and the outer side wall of the flushing needle (6), and the second end part of the second tubular part (2) is used for abutting against the root canal orifice (10), so that liquid flowing out through the flushing needle (6) can be sucked and discharged from the root canal orifice (10) through the pipeline by means of negative pressure.

9. The dental root canal negative pressure flushing-sucking system according to claim 8, wherein:

the dental root canal negative pressure flushing and sucking system is also provided with a pressurizing device (11), the pressurizing device (11) is connected to the second end part of the liquid supply conduit (8) and is used for applying the pressure for pushing liquid to the liquid supply conduit (8) and further to the flushing needle (6),

the hand-held part (9) is provided with a switch (13) for controlling the operation of the pressurizing device (11).

10. The dental root canal negative pressure flushing-sucking system according to claim 9, wherein:

the dental root canal negative pressure flushing and sucking system is also provided with a warming device (12), the pressurizing device (11) is connected to the second end part of the liquid supply conduit (8) and is used for controllably applying pressure for pushing liquid to the liquid supply conduit (8) and further to the flushing needle (6), the warming device is used for warming and preheating the liquid supplied to the liquid supply conduit (8) to a preset temperature,

a switch (13) is arranged on the handheld part (9), and the switch (13) is used for controlling the operation of the pressurizing device (11) and/or the warming device (12).

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