阅读说明：本技术 牙胶装填结构和牙胶充填机 (Gutta-percha filling structure and gutta-percha filling machine ) 是由 陆友 吴坤优 覃荣情 陈泽荣 张本琴 林剑华 韦锋文 孙胜 于 2021-09-14 设计创作，主要内容包括：本发明实施例提供了一种牙胶装填结构和牙胶充填机,涉及根管治疗技术领域,其中,牙胶装填结构包括可拆卸连接的手柄固定套和针头固定套；设置于手柄固定套内的发热管；穿设于针头固定套背离手柄固定套的一端,且部分可拆卸地容置于发热管内的针头组件,针头组件设置有口径依次减小,且相连通的牙胶腔和热胶通道,牙胶腔用于装填牙胶；可往复移动地部分容置于发热管和牙胶腔内的推杆,该推杆用于推抵牙胶,以使牙胶从牙胶腔通入热胶通道。由此,更换牙胶时只需要将针头组件和针头固定套一起拆卸,即可直接向针头组件的牙胶腔装填牙胶,避免了新牙胶与手柄的接触,降低了患者感染风险,提高了医疗体验。(The embodiment of the invention provides a gutta-percha filling structure and a gutta-percha filling machine, and relates to the technical field of root canal therapy, wherein the gutta-percha filling structure comprises a handle fixing sleeve and a needle head fixing sleeve which are detachably connected; the heating tube is arranged in the handle fixing sleeve; the needle head assembly penetrates through one end, away from the handle fixing sleeve, of the needle head fixing sleeve, part of the needle head assembly is detachably accommodated in the heating tube, the needle head assembly is provided with a gutta-percha cavity and a hot glue channel, the calibers of the gutta-percha cavity are sequentially reduced and communicated, and the gutta-percha cavity is used for filling gutta-percha; but the push rod of reciprocating motion ground part holding in heating tube and gutta-percha intracavity, this push rod is used for pushing away to the gutta-percha to make the gutta-percha let in the hot glue passageway from the gutta-percha chamber. From this, only need dismantle syringe needle subassembly and the fixed cover of syringe needle together when changing the gutta-percha, can directly load the gutta-percha to the gutta-percha chamber of syringe needle subassembly, avoided the contact of new gutta-percha with the handle, reduced patient infection risk, improved medical experience.)

1. A gutta-percha filling structure, comprising:

the handle fixing sleeve and the needle head fixing sleeve are detachably connected;

the heating tube is arranged in the handle fixing sleeve;

the needle head assembly penetrates through one end, away from the handle fixing sleeve, of the needle head fixing sleeve, and part of the needle head assembly is detachably accommodated in the heating tube, wherein the needle head assembly is provided with a gutta-percha cavity and a hot glue channel, the calibers of the gutta-percha cavity are sequentially reduced and communicated with each other, and the gutta-percha cavity is used for filling gutta-percha;

the push rod can be moved to and fro and is partially accommodated in the heating tube and the gutta-percha cavity, and is used for pushing the gutta-percha so that the gutta-percha is introduced into the hot glue channel from the gutta-percha cavity.

2. The gutta-percha loading structure as in claim 1, wherein said handle retainer and said needle retainer are detachably engaged.

3. The gutta-percha loading structure as in claim 2, wherein said handle retainer includes a main body portion and a connecting portion which are sequentially reduced in outer diameter and connected, said needle retainer being detachably fitted over said connecting portion.

4. The gutta-percha loading structure as in claim 3, wherein said coupling portion is provided at an outer peripheral surface thereof with an external thread, and said needle hub is provided at an inner peripheral surface thereof with an internal thread, said needle hub being screw-engaged with said coupling portion.

5. The gutta-percha filling structure as in claim 3, wherein said connecting portion is provided at an outer peripheral surface thereof with a first engaging portion, and said needle hub is provided at an inner peripheral surface thereof with a second engaging portion, said first engaging portion being engaged with said second engaging portion.

6. The gutta-percha filling structure as in claim 1, wherein said needle assembly comprises a glue injection needle and a glue injection tube connected, an inner hole of said glue injection needle is said hot glue passage, an inner hole of said glue injection tube is said gutta-percha cavity; the glue injection needle penetrates through one end, deviating from the handle fixing sleeve, of the needle head fixing sleeve, and the glue injection cylinder part is detachably accommodated in the heating tube.

7. The gutta-percha filling structure as in claim 6, wherein the inner hole of the heating tube comprises a first hole section and a second hole section, the caliber of which is sequentially increased and which are communicated, a step surface is formed between the first hole section and the second hole section, the detachable part of the glue injection tube is accommodated in the second hole section, the end surface of the glue injection tube departing from the glue injection needle is abutted against the step surface, and the push rod is accommodated in the first hole section and the gutta-percha cavity in a reciprocating manner.

8. The gutta-percha filling structure as in claim 7, wherein said inner hole of said heat pipe further comprises a third hole section, said third hole section communicates with an end of said second hole section facing away from said first hole section, and a diameter of said third hole section is gradually reduced along a direction from said first hole section to said second hole section.

9. The gutta-percha filling structure as in claim 1, wherein a sealing member is provided between a portion of said push rod located outside said heat-generating tube and an end of said heat-generating tube away from said needle hub.

10. A gutta-percha filling machine comprising a handle and a gutta-percha filling structure as in any one of claims 1 to 9, wherein an end of said handle holder facing away from said needle holder is connected to said handle, and said push rod portion is located inside said handle.

Technical Field

The invention relates to the technical field of root canal therapy, in particular to a gutta-percha filling structure and a gutta-percha filling machine.

Background

Human teeth contain pulp cavities and 1-4 root canals, and blood vessels of dental nerves and trophic nerves are led out through the root canals, so that when infections occur in the pulp due to various conditions, functional damage of the teeth can be caused, and pains, jaw infection and other diseases can be caused. Root canal therapy is also called endodontic therapy, is a treatment method developed in recent years for protecting affected teeth, and has better treatment and protection effects on dental problems such as chronic pulpitis, chronic periapical periodontitis, periodontal pulp combined lesion, traumatic teeth and the like.

Root canal treatment includes several main treatment stages, including root canal preparation, disinfection, root canal filling, etc. after the root canal preparation and disinfection, the root canal filling is to fill the expanded root canal with medicine material to make the medicine material fit to the wall of the root canal. For root canal filling, gutta-percha filling machines are often used.

The inventor researches and discovers that the existing gutta-percha filling machine is generally provided with a gutta-percha mouth communicated with a gutta-percha cavity on the side surface of a handle so as to replace the gutta-percha, so that the residual gutta-percha in a residual heating tube is inconvenient to clean; in addition, because the handle has a large amount of bacteria, consequently the mouth of gluing also inevitably adheres to there is the bacterium, and at the in-process of changing the gutta-percha, new gutta-percha also can carry the bacterium, finally leads to carrying the gutta-percha of bacterium to fill to the root canal of patient, and the patient is easily infected, and medical experience is poor.

Disclosure of Invention

The invention aims to provide a gutta-percha filling structure and a gutta-percha filling machine, which can reduce the infection risk of a patient and have good medical experience.

In a first aspect, the present invention provides a gutta-percha filling structure, comprising:

the handle fixing sleeve and the needle head fixing sleeve are detachably connected;

the heating tube is arranged in the handle fixing sleeve;

the needle head assembly penetrates through one end, away from the handle fixing sleeve, of the needle head fixing sleeve, and part of the needle head assembly is detachably accommodated in the heating tube, wherein the needle head assembly is provided with a gutta-percha cavity and a hot glue channel, the calibers of the gutta-percha cavity are sequentially reduced and communicated with each other, and the gutta-percha cavity is used for filling gutta-percha;

the push rod can be moved to and fro and is partially accommodated in the heating tube and the gutta-percha cavity, and is used for pushing the gutta-percha so that the gutta-percha is introduced into the hot glue channel from the gutta-percha cavity.

In an alternative embodiment, said handle hub and said needle hub are removably telescoped.

In an alternative embodiment, the handle fixing sleeve comprises a main body part and a connecting part which are sequentially reduced in outer diameter and are connected, and the needle fixing sleeve is detachably sleeved outside the connecting part.

In an alternative embodiment, the outer peripheral surface of the connecting portion is provided with external threads, the inner peripheral surface of the needle hub is provided with internal threads, and the needle hub is threadedly engaged with the connecting portion.

In an alternative embodiment, the outer circumferential surface of the connecting portion is provided with a first engaging portion, the inner circumferential surface of the needle hub is provided with a second engaging portion, and the first engaging portion and the second engaging portion are engaged.

In an optional embodiment, the needle head assembly comprises a glue injection needle and a glue injection barrel which are connected, an inner hole of the glue injection needle is the hot glue channel, and an inner hole of the glue injection barrel is the tooth glue cavity; the glue injection needle penetrates through one end, deviating from the handle fixing sleeve, of the needle head fixing sleeve, and the glue injection cylinder part is detachably accommodated in the heating tube.

In an optional implementation mode, the inner hole of the heating tube comprises a first hole section and a second hole section, the calibers of the first hole section and the second hole section are sequentially increased and are communicated, a step surface is formed between the first hole section and the second hole section, the detachable part of the glue injection tube is accommodated in the second hole section, the end face, deviating from the glue injection needle, of the glue injection tube abuts against the step surface, and the push rod is accommodated in the first hole section and the gutta-percha cavity in a reciprocating manner.

In an optional implementation manner, the inner hole of the heating tube further includes a third hole section, the third hole section is communicated with one end of the second hole section, which is away from the first hole section, and the caliber of the third hole section is gradually reduced along the direction from the first hole section to the second hole section.

In an alternative embodiment, a sealing element is arranged between the part of the push rod, which is positioned outside the heating tube, and one end of the heating tube, which is far away from the needle head fixing sleeve.

In a second aspect, the present invention provides a gutta-percha filling machine, which comprises a handle and the gutta-percha filling structure of any one of the previous embodiments, wherein an end of the handle fixing sleeve, which is away from the needle fixing sleeve, is connected with the handle, and the push rod part is located in the handle.

According to the gutta-percha filling structure and the gutta-percha filling machine provided by the invention, the needle head assembly is arranged at one end of the needle head fixing sleeve, which is far away from the handle fixing sleeve, in a penetrating manner, the needle head fixing sleeve is detachably connected with the handle fixing sleeve, and the needle head assembly is provided with the gutta-percha cavity and the hot glue channel which are communicated with each other, so that the needle head fixing sleeve can be separated from the handle fixing sleeve, the needle head assembly is separated from the heating tube along with the disassembly of the needle head fixing sleeve, a doctor can place the gutta-percha stick in the gutta cavity, then the needle head assembly is partially detachably arranged in the heating tube in a penetrating manner, and the needle head fixing sleeve is detachably connected with the handle fixing sleeve, so that the filling of the gutta-percha can be completed; after making the heating tube intensifies the back again, the gutta-percha of gutta-percha intracavity softens thereupon, because the push rod can reciprocating motion ground part hold place the heating tube in and the gutta-percha intracavity, consequently the gutta-percha of intracavity is heated and is softened the back, makes the push rod extrude the gutta-percha after softening to the injecting glue passageway, just can make the gutta-percha after softening let in the hot glue passageway from the gutta-percha chamber, fills to the root canal of patient through the hot glue passageway at last, realizes that the root canal fills.

If the gutta-percha is used up and needs to be replaced by new gutta-percha, the needle head fixing sleeve and the handle fixing sleeve are only required to be separated, and the needle head assembly is separated from the heating tube, so that a doctor can conveniently and directly clean residual gutta-percha in a gutta hole, if the gutta-percha is excessive, the cleaning time is long, and in order to avoid too long waiting time of a patient, the new needle head assembly and the new needle head fixing sleeve can be directly replaced, and the needle head assembly and the needle head fixing sleeve can also be directly cleaned, sterilized and disinfected, so that the sterility of instruments is ensured, and the infection risk is reduced; then a new gutta-percha rod is put into the gutta-percha cavity, the needle head component is inserted into the heating tube, and the needle head fixing sleeve is assembled with the handle fixing sleeve. In addition, in the process of replacing the gutta-percha, the new gutta-percha rod can not contact the handle at all, so that the gutta-percha can be prevented from being attached with germs, the infection risk is reduced, and the medical experience of a patient is good.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is an exploded view of a gutta percha loading structure in accordance with an embodiment of the present invention;

FIG. 2 is a cutaway schematic view of FIG. 1;

fig. 3 is a cross-sectional view of a heat pipe according to an embodiment of the present invention.

Icon: 1-handle fixing sleeve; 10-a body portion; 12-a linking moiety; 121-a first engaging portion; 123-a first guiding bevel; 125-third guiding slope; 3-needle fixing sleeve; 32-a second guide ramp; 5-a needle assembly; 50-glue injection cylinder; 501-gutta-percha cavity; 52-glue injection needle; 521-a hot glue channel; 6-gutta-percha; 7-a heating tube; 70-a first bore section; 72-a second bore section; 74-a third pore section; 76-step surface; 8-a seal; 9-push rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Root canal treatment includes several main treatment stages, root canal preparation, disinfection, root canal filling, etc. the root canal preparation is to perform mechanical cutting and file expanding on the root canal to achieve the required shaping, so as to create better space conditions for subsequent root canal filling. Disinfection is the removal of organic matter in the root canal and infected tissue (bacteria) of the root canal by irrigation after the root canal preparation is completed. In root canal filling, after the root canal preparation and sterilization are completed, a medicinal material is filled into the enlarged root canal so that the filled medicinal material is attached to the wall of the root canal. For root canal filling, gutta-percha filling machines are often used.

The step of filling the root canal is usually to stick a proper gutta-percha point with paste and then to extend into the enlarged root canal, then to soften and cut the gutta-percha point by using a working tip heated by a heat carrier, then to compact the gutta-percha in the root canal by a vertical pressurizer, and finally to fill the root canal by injecting the gutta-percha by using a gutta-percha filling machine. The working process of the gutta-percha filling machine is that the gutta-percha rod is arranged in the instrument, the filling machine heats and softens the gutta-percha rod, and the softened gutta-percha is pushed out from the glue injection needle through the internal push rod.

However, the inventor researches and discovers that the existing gutta-percha filling machine is generally provided with a gutta-percha mouth communicated with a gutta-percha cavity on the side surface of a handle so as to replace the gutta-percha, so that the residual gutta-percha in a residual heating tube is inconvenient to clean; in addition, because the handle has a large amount of bacteria, consequently the mouth of gluing also inevitably adheres to there is the bacterium, and at the in-process of changing the gutta-percha, new gutta-percha also can carry the bacterium, finally leads to carrying the gutta-percha of bacterium to fill to the root canal of patient, and the patient is easily infected, and medical experience is poor.

Therefore, the inventors have studied to propose the following examples to improve the above-mentioned defects, and some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1 and 2, an embodiment of the present invention provides a gutta-percha filling machine, which includes a handle and a gutta-percha filling structure, wherein the gutta-percha filling structure includes a handle fixing sleeve 1 and a needle fixing sleeve 3 which are detachably connected, and one end of the handle fixing sleeve 1, which is far away from the needle fixing sleeve 3, is connected with the handle. A heating tube 7 arranged in the handle fixing sleeve 1. Wear to locate the syringe needle subassembly 5 that the fixed cover 3 of syringe needle deviates from the fixed cover 1's of handle one end, and this syringe needle subassembly 5 part detachably holding in heating tube 7, wherein, syringe needle subassembly 5 is provided with the bore and reduces in proper order, and the gutta-percha chamber 501 and the hot glue passageway 521 that are linked together, and the gutta-percha chamber 501 is used for filling gutta-percha 6. But reciprocating motion ground part holds the push rod 9 in heat-generating pipe 7 and gutta-percha chamber 501, and the handle is worn to locate in another part of push rod 9 to this push rod 9 can be used for pushing away gutta-percha 6, so that gutta-percha 6 lets in hot glue passageway 521 from gutta-percha chamber 501.

Bearing the above, because the needle head component 5 is arranged at one end of the needle head fixing sleeve 3 deviating from the handle fixing sleeve 1 in a penetrating way, the needle head fixing sleeve 3 is detachably connected with the handle fixing sleeve 1, and the needle head component 5 is provided with the gutta-percha cavity 501 and the thermal gel channel 521 which are communicated with each other, so that the needle head fixing sleeve 3 can be separated from the handle fixing sleeve 1, the needle head component 5 is also separated from the heating tube 7 along with the disassembly of the needle head fixing sleeve 3, so that a doctor can place a gutta-percha 6 rod in the gutta-percha cavity 501, then the needle head component 5 is partially detachably arranged in the heating tube 7 in a penetrating way, the needle head fixing sleeve 3 is detachably connected with the handle fixing sleeve 1, and the filling of the gutta-percha 6 can be completed; afterwards make heating tube 7 after rising temperature again, gutta-percha 6 in the gutta-percha chamber 501 softens thereupon, because push rod 9 can reciprocating motion ground part hold in heating tube 7 and gutta-percha chamber 501, consequently the gutta-percha 6 in the gutta-percha chamber 501 is heated and softens the back, makes push rod 9 extrude the gutta-percha 6 after softening to the injecting glue passageway, just can make the gutta-percha 6 after softening let in hot glue passageway 521 from gutta-percha chamber 501, fill in the root canal of patient through hot glue passageway 521 at last, realize the root canal and fill.

If the gutta-percha 6 is used up and the new gutta-percha 6 is needed to be replaced, the needle head fixing sleeve 3 is only needed to be separated from the handle fixing sleeve 1, and the needle head component 5 is separated from the heating tube 7, so that a doctor can conveniently and directly clean the residual gutta-percha 6 in the gutta-percha 6 hole, if the gutta-percha 6 is remained too much, the cleaning time is long, in order to avoid the waiting time of a patient to be too long, the new needle head component 5 and the new needle head fixing sleeve 3 can be directly replaced, the needle head component 5 and the new needle head fixing sleeve 3 can also be directly cleaned, disinfected and sterilized, the sterility of instruments is ensured, and the infection risk is reduced; then a new gutta-percha 6 rod is put into the gutta-percha cavity 501, the needle head component 5 is inserted into the heating tube 7, and the needle head fixing sleeve 3 is assembled with the handle fixing sleeve 1. And in the process of replacing the gutta-percha 6, the new gutta-percha 6 rod can not contact the handle at all, so that the gutta-percha 6 can be prevented from being attached with germs, the infection risk is reduced, and the medical experience of a patient is good.

Meanwhile, due to the gutta-percha filling machine in the prior art, if the temperature of the gutta-percha cavity 501 is high, the newly-placed gutta-percha 6 is softened and deformed, and the subsequent propelling operation of the gutta-percha 6 is affected, so that the gutta-percha 6 can be replaced after the gutta-percha cavity 501 is cooled, and the time for filling the whole root canal is long. The gutta-percha filling machine provided by the embodiment of the invention can directly replace the original needle head fixing sleeve 3 and the original needle head component 5 after the original needle head fixing sleeve 3 and the original needle head component 5 are detached when the gutta-percha 6 is replaced, and can be used for filling a new gutta-percha 6 rod, the needle head component 5 and the needle head fixing sleeve 3 are respectively assembled with the heating tube 7 and the handle fixing sleeve 1, so that the root canal filling can be continuously carried out, the new gutta-percha 6 can be filled without waiting for the cooling of the gutta-percha cavity 501 of the original needle head component 5, the medical treatment time of a patient is reduced, and the medical experience of the patient is further improved.

In this embodiment, the handle hub 1 and the needle hub 3 are removably nested. Further, the handle fixing sleeve 1 comprises a main body part 10 and a connecting part 12 which are sequentially reduced in outer diameter and are connected, and the needle fixing sleeve 3 is detachably sleeved outside the connecting part 12. Wherein, a holding surface is formed between the connecting part 12 and the main body part 10, and one end of the needle fixing sleeve 3 is attached to the holding surface.

In order to facilitate the detachable connection between the needle hub 3 and the handle hub 1, the connecting portion 12 has a chamfer at its outer periphery facing away from the main portion 10 to form a first annular guiding bevel 123, and correspondingly, the inner periphery of the open end of the inner bore of the needle hub 3 has a chamfer to form a second annular guiding bevel 32, and the first guiding bevel 123 and the second guiding bevel 32 have matching shapes.

Specifically, the handle holder 1 and the needle holder 3 may be detachably coupled by a screw, for example, an outer circumferential surface of the coupling portion 12 is provided with an external screw, an inner circumferential surface of the needle holder 3 is provided with an internal screw, and the needle holder 3 is screw-engaged with the coupling portion 12.

The detachable connection mode of the handle fixing sleeve 1 and the needle fixing sleeve 3 can also be a clamping connection mode, for example, the outer peripheral surface of the connection part 12 is provided with a first clamping part 121, the inner peripheral surface of the needle fixing sleeve 3 is provided with a second clamping part, the first clamping part 121 and the second clamping part are clamped, wherein the first clamping part 121 can be an annular bulge surrounding the outer peripheral surface of the connection part 12, the end surface of the first clamping part 121 departing from the main body part 10 is a third guide inclined surface 125, the outer diameter of the third guide inclined surface 125 is gradually increased along the direction from the connection part 12 to the main body part 10, so that the guide positioning effect is achieved, the needle fixing sleeve 3 is favorably sleeved outside the connection part 12, and the assembly of the needle fixing sleeve 3 and the handle fixing sleeve 1 is facilitated.

The fixed cover 1 of handle and the fixed cover 3 of syringe needle can also be connected by screw in the detachable connected mode, for example, support and be provided with the screw hole on the face, the one end of the fixed cover 3 of syringe needle is equipped with the through-hole, at first locates the fixed cover 3 cover of syringe needle outside the coupling part 12, then adopts the screw to pass through the back screw in threaded hole, just can be connected fixed cover 1 of handle and the fixed cover 3 of syringe needle.

The needle head assembly 5 comprises a glue injection needle 52 and a glue injection barrel 50 which are connected, an inner hole of the glue injection needle 52 is a hot glue channel 521, and an inner hole of the glue injection barrel 50 is a gutta-percha cavity 501; the glue injection needle 52 penetrates through one end of the needle head fixing sleeve 3 departing from the handle fixing sleeve 1, one part of the glue injection cylinder 50 is accommodated in the needle head fixing sleeve 3, and the other part of the glue injection cylinder 50 is detachably accommodated in the heating tube 7. The glue injection needle 52 and the glue injection barrel 50 may be integrally connected or detachably connected, and the specific connection manner is not limited in this embodiment. For example, the glue injection needle 52 and the glue injection cylinder 50 may be connected by a screw, that is, an internal thread is provided at one end of the glue injection cylinder 50, and an external thread matching the internal thread of the glue injection cylinder 50 is provided at one end of the glue injection needle 52.

Referring to fig. 1 to 3, the inner bore of the heating tube 7 includes a first bore section 70 and a second bore section 72, the bore diameters of which are sequentially increased and are communicated with each other, a step surface 76 is formed between the first bore section 70 and the second bore section 72, the glue injection tube 50 is partially accommodated in the second bore section 72 in a detachable manner, an end surface of the glue injection tube 50 facing away from the glue injection needle 52 abuts against the step surface 76, and the push rod 9 is accommodated in the first bore section 70 and the gutta-percha cavity 501 in a reciprocating manner, wherein the glue injection tube 50 abuts against the step surface 76, so that the softened gutta-percha 6 in the gutta-percha cavity 501 can be prevented from flowing out from a gap between the glue injection tube 50 and the heating tube 7, and good sealing performance is ensured.

In this embodiment, the hole of the heat-generating tube 7 further includes a third hole section 74, the third hole section 74 communicates with the second hole section 72 at the end away from the first hole section 70, and along the direction from the first hole section 70 to the second hole section 72, the caliber of the third hole section 74 is gradually reduced, that is, the third hole section 74 is a taper hole, which plays a role in guiding and positioning, so as to facilitate the injection of the injection tube 50 into the heat-generating tube 7.

The push rod 9 is located and is provided with sealing member 8 between the part outside the heating tube 7 and the one end that the heating tube 7 deviates from the fixed cover 3 of syringe needle, sealing member 8 fixes the one end that the heating tube 7 deviates from the rubber injection needle 52 promptly, sealing member 8, heating tube 7 and push rod 9 constitute and move seal structure, thereby this sealing member 8 can guarantee that the soft gutta percha 6 in the gutta percha chamber 501 can not spill over from the gap between push rod 9 and the heating tube 7, wherein, sealing member 8 can be all kinds of rings, have elasticity or flexible sealing washer.

To sum up, according to the gutta-percha filling structure and the gutta-percha filling machine provided by the embodiment of the invention, the needle head assembly 5 is arranged at one end of the needle head fixing sleeve 3 departing from the handle fixing sleeve 1 in a penetrating manner, the needle head fixing sleeve 3 is detachably connected with the handle fixing sleeve 1, and the needle head assembly 5 is provided with the gutta-percha cavity 501 and the thermal gel channel 521 which are communicated with each other, so that the needle head fixing sleeve 3 can be separated from the handle fixing sleeve 1, the needle head assembly 5 is separated from the heating tube 7 along with the detachment of the needle head fixing sleeve 3, a doctor can place the gutta-percha 6 rod in the gutta cavity 501, then the needle head assembly 5 is partially detachably arranged in the heating tube 7 in a penetrating manner, and the needle head fixing sleeve 3 is detachably connected with the handle fixing sleeve 1, and then the filling of the gutta 6 can be completed; afterwards make heating tube 7 after rising temperature again, gutta-percha 6 in the gutta-percha chamber 501 softens thereupon, because push rod 9 can reciprocating motion ground part hold in heating tube 7 and gutta-percha chamber 501, consequently the gutta-percha 6 in the gutta-percha chamber 501 is heated and softens the back, makes push rod 9 extrude the gutta-percha 6 after softening to the injecting glue passageway, just can make the gutta-percha 6 after softening let in hot glue passageway 521 from gutta-percha chamber 501, fill in the root canal of patient through hot glue passageway 521 at last, realize the root canal and fill.

If the gutta-percha 6 is used up and the new gutta-percha 6 is needed to be replaced, the needle head fixing sleeve 3 is only needed to be separated from the handle fixing sleeve 1, and the needle head component 5 is separated from the heating tube 7, so that a doctor can conveniently and directly clean the residual gutta-percha 6 in the gutta-percha 6 hole, if the gutta-percha 6 is remained too much, the cleaning time is long, in order to avoid the waiting time of a patient to be too long, the new needle head component 5 and the new needle head fixing sleeve 3 can be directly replaced, the needle head component 5 and the new needle head fixing sleeve 3 can also be directly cleaned, disinfected and sterilized, the sterility of instruments is ensured, and the infection risk is reduced; then a new gutta-percha 6 rod is put into the gutta-percha cavity 501, the needle head component 5 is inserted into the heating tube 7, and the needle head fixing sleeve 3 is assembled with the handle fixing sleeve 1. And in the process of replacing the gutta-percha 6, the new gutta-percha 6 rod can not contact the handle at all, so that the gutta-percha 6 can be prevented from being attached with germs, the infection risk is reduced, and the medical experience of a patient is good.

Meanwhile, due to the gutta-percha filling machine in the prior art, if the temperature of the gutta-percha cavity 501 is high, the newly-placed gutta-percha 6 is softened and deformed, and the subsequent propelling operation of the gutta-percha 6 is affected, so that the gutta-percha 6 can be replaced after the gutta-percha cavity 501 is cooled, and the time for filling the whole root canal is long. The gutta-percha filling machine provided by the embodiment of the invention can directly replace the original needle head fixing sleeve 3 and the original needle head component 5 after the original needle head fixing sleeve 3 and the original needle head component 5 are detached when the gutta-percha 6 is replaced, and can be used for filling a new gutta-percha 6 rod, the needle head component 5 and the needle head fixing sleeve 3 are respectively assembled with the heating tube 7 and the handle fixing sleeve 1, so that the root canal filling can be continuously carried out, the new gutta-percha 6 can be filled without waiting for the cooling of the gutta-percha cavity 501 of the original needle head component 5, the medical treatment time of a patient is reduced, and the medical experience of the patient is further improved.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.