Glue injection needle capable of preventing gutta-percha from being broken

Abstract

The utility model discloses an anti-breakage gutta-percha filling and injecting needle which comprises a machine head fixing shell, a connecting piece, a glue injecting needle and an anti-breakage structure. The machine head fixing shell is connected with the connecting piece, the glue injection needle is installed on the connecting piece, the circumferential surface of the glue injection needle is wrapped with the anti-breaking structure, and the anti-breaking structure at least wraps the matching part and part of the connecting part; the anti-breakage structure at least reduces the breakage probability of the matching part when the matching part is bent. According to the anti-breakage gutta-percha filling and injecting needle disclosed by the utility model, by arranging the anti-breakage structure, the probability of breakage of the gutta-percha filling and injecting needle when the gutta-percha filling and injecting needle is manually bent is reduced, and the service life of the gutta-percha filling and injecting needle is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to glue injection needle technical field especially relates to a kind of anti-breaking tooth glue filling glue injection needle. BACKGROUND

[0002] Tooth glue filling machine is a kind of instrument commonly used in dental repair process, with efficient convenient, accurate control, multi-functional and safe and reliable etc., one of its main functions is to fill the hole on tooth, namely tooth glue filling machine can accurately inject tooth glue material into the hole or damaged part of tooth, to protect the nerve and blood vessel of tooth, and restore mastication function.In the hole filling process, dentist needs to extend the front end of tooth glue filling glue injection needle into the hole.Because the space in oral cavity is small, tooth glue filling glue injection needle is difficult to extend into the hole when filling the tooth hole in the relatively inner side of oral cavity, which affects the filling effect, and even can cause the problem of incomplete filling.

[0003] To solve the above-mentioned problem that tooth glue filling glue injection needle is difficult to fill the tooth hole in the deep part of oral cavity, in the prior art, the doctor generally manually bends the tooth glue filling glue injection needle from the position close to the root during operation, and generally manually adjusts the bending angle according to the position to be filled and the depth of the hole, so that the front end of the tooth glue filling glue injection needle in the bending state can extend into the tooth hole in the deep part of oral cavity, to realize good filling of the tooth hole.But in the process of manually bending the tooth glue filling glue injection needle, it is easy to cause the tooth glue filling glue injection needle to break, so that the tooth glue filling glue injection needle cannot be used, resulting in increased cost and waste. UTILITY MODEL CONTENTS

[0004] In order to overcome at least one of the defects of the prior art described above, the utility model provides an anti-breaking tooth glue filling glue injection needle, which protects the tooth glue filling glue injection needle from breaking during manual bending by setting a breaking prevention structure, and prolongs the service life of the tooth glue filling glue injection needle.

[0005] The utility model adopts the technical scheme to solve the problem:

[0006] An anti-breaking tooth glue filling glue injection needle comprises:

[0007] A handpiece fixing shell has a first end and a second end, the first end is provided with a connecting hole penetrating along the axial direction thereof, and the second end is used for connecting a body;

[0008] A connecting piece is provided with a first through hole penetrating along the axial direction thereof.

[0009] The glue injection needle is arranged in the first through hole, and the glue injection needle comprises a connecting part, a matching part and a probe-in part. The connecting part is arranged close to the handpiece fixing shell. The probe-in part is used for probing into a glue filling position. When the dental glue is filled, the dental glue enters the glue injection needle from the connecting part and is extruded from the probe-in part. The matching part is located outside the first through hole and is connected with the connecting part.

[0010] The anti-breaking structure is arranged in the first through hole and wraps around the circumferential surface of the glue injection needle. The anti-breaking structure at least wraps around the matching part and part of the connecting part. When the matching part is bent, the anti-breaking structure reduces the probability of breaking the matching part.

[0011] Further, the anti-breaking structure comprises a wrapping sleeve pipe which wraps around the outer circumferential surface of the matching part and at least part of the connecting part.

[0012] Further, the wrapping sleeve pipe is a metal pipe.

[0013] Further, the wrapping sleeve pipe is a nickel-titanium pipe.

[0014] Further, the wrapping sleeve pipe is a stainless steel pipe.

[0015] Further, the wrapping sleeve pipe is in interference fit with the glue injection needle.

[0016] Further, the wrapping sleeve pipe is welded to the glue injection needle.

[0017] Further, the wrapping sleeve pipe is fixedly installed on the connecting part.

[0018] Further, the connecting part comprises a glue injection needle guide sleeve, a snap ring and a rotating sheet.

[0019] The rotating sheet is rotationally connected to the first end of the handpiece fixing shell, and the rotating sheet is provided with a second through hole in the axial direction of the rotating sheet.

[0020] The outer circumferential surface of the glue injection needle guide sleeve is provided with a limiting clamping groove. The glue injection needle guide sleeve is arranged in the second through hole, and the glue injection needle guide sleeve extends from the front end surface of the rotating sheet away from the handpiece fixing shell. The limiting clamping groove is located in front of the front end surface of the rotating sheet away from the handpiece fixing shell. The first through hole is arranged on the glue injection needle guide sleeve. The anti-breaking structure is arranged between the connecting part and the glue injection needle guide sleeve and at least partially wraps around the connecting part.

[0021] The snap ring is sleeved in the limiting clamping groove and abuts against the front end surface of the rotating sheet.

[0022] Further, the anti-breaking structure wraps around the entire connecting part.

[0023] In summary, the tooth filling injection needle with the tooth breaking prevention function has the following technical effects:

[0024] The tooth breaking prevention structure is sleeved on the part (the matching part) of the injection needle that needs to be manually bent, and the tooth breaking prevention structure wraps the injection needle, so that the injection needle is uniformly stressed when being bent, and the probability of the injection needle being broken at the bent part is reduced. In addition, the tooth breaking prevention structure is wrapped on the injection needle, and the tooth breaking prevention structure can slow down the bending process of the injection needle, so as to avoid the injection needle from being broken due to excessive bending. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 FIG. 1 is a structural schematic diagram of an embodiment of the tooth filling injection needle with the tooth breaking prevention function according to the technical scheme of the present application.

[0026] Figure 2 FIG. 2 is a structural schematic diagram of an embodiment of the tooth breaking prevention structure installation in the tooth filling injection needle with the tooth breaking prevention function according to the technical scheme of the present application.

[0027] Figure 3 FIG. 3 is a structural schematic diagram of another embodiment of the tooth breaking prevention structure installation in the tooth filling injection needle with the tooth breaking prevention function according to the technical scheme of the present application.

[0028] Figure 4 FIG. 4 is a structural schematic diagram of the tooth breaking prevention structure in the tooth filling injection needle with the tooth breaking prevention function according to the technical scheme of the present application. Figure 3 FIG. 5 is an enlarged view of position A in FIG. 4.

[0029] In the drawings, the meanings of the reference signs are as follows:

[0030] 1, injection needle; 11, insertion part; 12, connecting part; 13, matching part; 2, tooth breaking prevention structure; 3, injection needle guide sleeve; 31, first through hole; 32, limiting clamping groove; 4, clamping ring; 41, second through hole; 5, rotating piece; 6, machine head fixed shell; 61, first end; 62, second end; 63, connecting hole. DETAILED DESCRIPTION

[0031] In order to better understand and implement, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application.

[0032] In the description of the present application, it should be noted that the directions or position relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are the directions or position relationships based on the directions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the devices or elements indicated to have a specific direction, to be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0034] Referring to Figures 1 to 3 The utility model discloses a kind of anti-breaking dental adhesive filling glue injection needle.

[0035] A kind of anti-breaking dental adhesive filling glue injection needle, including machine head fixed shell 6, connecting piece, glue injection needle 1 and anti-breaking structure 2.

[0036] Wherein, machine head fixed shell 6 has first end 61 and second end 62, first end 61 is equipped with the connecting hole 63 that is penetrated along its own axial direction, and second end 62 is used to connect machine body.

[0037] Connecting piece is worn in connecting hole 63, and first through-hole 31 is provided on connecting piece and is penetrated along its own axial direction.

[0038] Glue injection needle 1 is worn in first through-hole 31, and glue injection needle 1 includes connecting portion 12, cooperation portion 13 and probe-in portion 11.Connecting portion 12 is close to machine head fixed shell 6 and is arranged, probe-in portion 11 is used to probe into filling glue site, and cooperation portion 13 is located outside first through-hole 31 and is connected with connecting portion 12.During dental adhesive filling, dental adhesive enters glue injection needle 1 from connecting portion 12, and is extruded by probe-in portion 11.

[0039] Anti-breaking structure 2 is worn in first through-hole 31, and is wrapped on the circumferential surface of glue injection needle 1.Anti-breaking structure 2 at least wraps cooperation portion 13 and part of connecting portion 12.Anti-breaking structure 2 at least when cooperation portion 13 is bent, reduces the probability of breaking cooperation portion 13.

[0040] When dentist uses dental adhesive filling glue injection needle, according to need, manually bending dental adhesive filling glue injection needle, and bending position is generally located on cooperation portion 13.Dental adhesive filling glue injection needle after bending can be smoothly inserted into the cavity in the hole on tooth, especially probe-in portion 11 of dental adhesive filling glue injection needle can be accurately inserted into the hole on tooth in the deeper position in the cavity, to facilitate filling in the hole on tooth, convenient operation, and filling effect is good.But, because dental adhesive filling glue injection needle is generally made of stainless steel material, when manually bending dental adhesive filling glue injection needle, dental adhesive filling glue injection needle appears breakage from bending position due to uneven stress or bending angle changes too fast, shortens the service life of dental adhesive filling glue injection needle, and increases medical cost.

[0041] Based on the above scheme, the bending position (cooperating part 13) of the gutta-percha filling needle is often wrapped with the break-proof structure 2. The break-proof structure 2 is wrapped outside the cooperating part 13 of the gutta-percha filling needle. When the cooperating part 13 of the gutta-percha filling needle is bent, the break-proof structure 2 is bent together with the cooperating part 13. The break-proof structure 2 can ensure that the bending force on the cooperating part 13 of the gutta-percha filling needle is uniform, thereby reducing the probability of the gutta-percha filling needle being broken.

[0042] In addition, the break-proof structure 2 is wrapped outside the cooperating part 13 of the gutta-percha filling needle, that is, the outer diameter of the cooperating part 13 of the gutta-percha filling needle is increased. When the gutta-percha filling needle is bent, the break-proof structure 2 is bent together with the cooperating part 13. The break-proof structure 2 can effectively slow down the change rate of curvature when the cooperating part 13 is bent, thereby reducing the probability of the cooperating part 13 of the gutta-percha filling needle being broken.

[0043] In addition, the break-proof structure 2 is wrapped outside the cooperating part 13 of the gutta-percha filling needle, that is, the outer diameter of the cooperating part 13 of the gutta-percha filling needle is increased. When the gutta-percha filling needle is bent, the break-proof structure 2 is bent together with the cooperating part 13. The break-proof structure 2 can effectively slow down the change rate of curvature when the cooperating part 13 is bent, thereby reducing the probability of the cooperating part 13 of the gutta-percha filling needle being broken.

[0044] In addition, the break-proof structure 2 is wrapped outside the cooperating part 13 of the gutta-percha filling needle, that is, the outer diameter of the cooperating part 13 of the gutta-percha filling needle is increased. When the gutta-percha filling needle is bent, the break-proof structure 2 is bent together with the cooperating part 13. The break-proof structure 2 can effectively slow down the change rate of curvature when the cooperating part 13 is bent, thereby reducing the probability of the cooperating part 13 of the gutta-percha filling needle being broken.

[0045] In the above scheme, by wrapping the break-proof structure 2 outside the cooperating part 13 of the gutta-percha filling needle, the breakage probability of the gutta-percha filling needle during the bending process can be effectively reduced, the service life of the gutta-percha filling needle is prolonged, and the medical cost is reduced.

[0046] In the above scheme, the injection needle 1 is a one-piece structure, and the connecting part 12, the cooperating part 13, and the insertion part 11 are three sections of the one-piece injection needle 1. However, the three sections are integrally formed, which ensures the strength of the injection needle 1 and simplifies the production process of the injection needle 1.

[0047] In the above scheme, the break-proof structure 2 also wraps at least part of the connecting part 12, which facilitates the installation and fixation of the break-proof structure 2, and makes the break-proof structure 2 relatively fixed with the injection needle 1.

[0048] The anti-breaking structure 2 comprises a wrapping sleeve, which is simple in structure and low in cost.

[0049] In the technical solution, the wrapping sleeve is a metal tube.

[0050] In the technical solution, the wrapping sleeve is a nickel-titanium tube.

[0051] In the technical solution, the wrapping sleeve is a stainless steel tube.

[0052] In the technical solution, as shown in Figure 1 , the wrapping sleeve is in interference fit with the injection needle 1.

[0053] In the technical solution, as shown in Figure 2 , the wrapping sleeve is welded to the injection needle 1.

[0054] In the technical solution, as shown in Figure 3 and Figure 4 , the wrapping sleeve is fixedly installed on the connecting piece. Figure 4A connecting shoulder is arranged on the upper part of the wrapping sleeve, and the connecting shoulder is pressed by the connecting member to realize the fixed connection between the wrapping sleeve and the connecting member.

[0055] In the technical solution, the connecting member comprises a glue injection needle guide sleeve 3, a clamping ring 4 and a rotating piece 5.

[0056] The rotating piece 5 is rotationally connected to a first end 61 of a handpiece fixed shell 6, and the rotating piece 5 is provided with a second through hole 41 along an axial direction of the rotating piece 5. By rotating the rotating piece 5, the glue injection needle 1 is rotated, so that the probe part 11 of the glue injection needle 1 can be easily changed in direction and orientation during operation, and the glue injection needle 1 can be easily extended into a cavity on a tooth in a mouth cavity, thereby facilitating operation.

[0057] A second end 62 of the handpiece fixed shell 6 is fixedly connected to a dental plugger, so as to realize the fixed connection between the anti-breaking dental plugger and the dental plugger.

[0058] The glue injection needle guide sleeve 3 is arranged in the second through hole 41, and the glue injection needle guide sleeve 3 extends from a front end face of the rotating piece 5 away from the handpiece fixed shell 6. A first through hole 31 is arranged on the glue injection needle guide sleeve 3, and the glue injection needle 1 is connected to the handpiece fixed shell 6 and extends out of the handpiece fixed shell 6.

[0059] A limiting clamping groove 32 is arranged on an outer circumferential surface of the glue injection needle guide sleeve 3, and the limiting clamping groove 32 is located in front of the front end face of the rotating piece 5 away from the handpiece fixed shell 6. The clamping ring 4 is sleeved in the limiting clamping groove 32 and abuts against the front end face of the rotating piece 5. The clamping ring 4 realizes the connection between the glue injection needle guide sleeve 3 and the handpiece fixed shell 6, ensures that the handpiece fixed shell 6 and the glue injection needle 1 are connected in an integral manner, and at the same time, the glue injection needle 1 is connected to the glue injection needle guide sleeve 3 and / or the handpiece fixed shell 6, realizes the connection between the glue injection needle 1 and the connecting member, and realizes the installation of the glue injection needle 1.

[0060] In the technical solution, the anti-breaking structure 2 is arranged between the connecting part 12 and the glue injection needle guide sleeve 3 and at least partially wraps the connecting part 12. A gap is left between the glue injection needle guide sleeve 3 and the connecting part 12 of the glue injection needle 1, the anti-breaking structure 2 is installed between the glue injection needle guide sleeve 3 and the connecting part 12 of the glue injection needle 1, and the installation of the anti-breaking structure 2 is realized. The anti-breaking structure 2 can be fixedly installed on the glue injection needle 1 or fixedly installed on the connecting member and wrapped outside the glue injection needle 1. The installation of the anti-breaking structure 2 has been described above, and at least three ways of interference fit, welding and fixed installation are provided.

[0061] In the technical solution, the anti-breaking structure 2 wraps the entire connecting part 12, which is convenient for the installation of the anti-breaking structure 2 and more reliable in wrapping, so as to avoid the breakage of the connecting part 12.

[0062] The technical means disclosed by the utility model scheme are not limited to the technical means disclosed by the above-mentioned embodiments, and also include technical schemes composed of any combination of the above technical features. It should be noted that, for ordinary skilled persons in the art, without departing from the principles of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered within the protection scope of the utility model.

Claims

1. A break-proof dental adhesive filling needle, characterized in that, The application relates to a fixing shell of a dental handpiece, which comprises a first end and a second end, the first end is provided with a connecting hole penetrating along the axial direction of the first end, and the second end is used for connecting a body; a connecting piece is arranged in the connecting hole, and the connecting piece is provided with a first through hole penetrating along the axial direction of the connecting piece; a glue injection needle is arranged in the first through hole, and the glue injection needle comprises a connecting part, a matching part and a probe part, the connecting part is arranged close to the fixing shell of the dental handpiece, the probe part is used for probing into a glue filling position, when dental glue is filled, the dental glue enters the glue injection needle from the connecting part and is extruded from the probe part, and the matching part is arranged outside the first through hole and is connected with the connecting part; a breakage prevention structure is arranged in the first through hole and wraps around the circumferential surface of the glue injection needle, and the breakage prevention structure wraps around at least the matching part and part of the connecting part; when the matching part is bent, the breakage prevention structure reduces the breakage probability of the matching part. The breakage prevention structure comprises a wrapping sleeve, which wraps around the outer circumferential surface of the matching part and at least part of the connecting part. The wrapping sleeve is a metal tube. The wrapping sleeve is a nickel-titanium tube. The wrapping sleeve is a stainless steel tube.

2. The tooth fracture prevention glue filling glue injection needle according to claim 1, wherein, The wrapping sleeve is in interference fit with the glue injection needle.

3. The anti-microburst resin filling needle according to claim 2, wherein, The wrapping sleeve is welded with the glue injection needle.

4. The tooth fracture prevention glue filling glue injection needle according to claim 3, wherein, The wrapping sleeve is fixedly arranged on the connecting piece.

5. The tooth fracture prevention glue filling glue injection needle according to claim 3, characterized in that, The connecting piece comprises a glue injection needle guide sleeve, a clamping ring and a rotating piece.

6. The filling needle according to any one of claims 2 to 5, wherein the filling needle is provided with a plurality of the projections. The rotating piece is rotationally connected to the first end of the fixing shell of the dental handpiece, and the rotating piece is provided with a second through hole along the axial direction of the rotating piece.

7. The filling needle according to any one of claims 2 to 5, wherein the filling needle is provided with a plurality of the projections. A limiting clamping groove is arranged on the outer circumferential surface of the glue injection needle guide sleeve, the glue injection needle guide sleeve is arranged in the second through hole, the glue injection needle guide sleeve extends out from the front end surface of the rotating piece away from the fixing shell of the dental handpiece, the limiting clamping groove is located in front of the front end surface of the rotating piece away from the fixing shell of the dental handpiece, the first through hole is arranged on the glue injection needle guide sleeve, and the breakage prevention structure is arranged between the connecting part and the glue injection needle guide sleeve and wraps around at least part of the connecting part.

8. The filling needle according to any one of claims 2 to 5, wherein the filling needle is a filling needle for filling a pit and fissure sealant. The clamping ring is arranged in the limiting clamping groove and abuts against the front end surface of the rotating piece.

9. The filling needle according to any one of claims 1 to 5, wherein the filling needle is used for filling the pit and fissure sealant. The breakage prevention structure wraps around the whole connecting part. ​ ​ ​ 10. The tooth fracture prevention glue filling glue injection needle according to claim 9, wherein, ​

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