Paste filling needle

Abstract

The utility model relates to a paste filling needle which comprises a seat body, a stainless steel needle connected with the seat body and a filling piece which is filled at the joint of the seat body and the stainless steel needle in a primary mode, an inner cavity and a channel are dug in the seat body, the inner cavity is communicated with the channel, and the channel penetrates through the seat body. The stainless steel needle partially extends into the channel and completely covers the inner surface of the whole channel, the filling piece is arranged at the tail end of the upper portion of the channel, and the outer diameter of the stainless steel needle is 0.23 mm. According to the paste filling needle provided by the utility model, a gap is formed between the paste filling needle and the inner wall of a root canal hole, so that the internal pressure of the root canal hole can be released in time in the paste injection process, the risk that the paste is overfilled outside a root tip due to overhigh pressure is avoided, and the treatment safety is improved.

Description

Technical Field

[0001] The utility model relates to the field of dental instruments, and particularly to a paste filling needle. Background Art

[0002] In the clinical practice of root canal treatment, the traditional paste filling needle, based on the design of the traditional root canal needle, gradually shows its limitations during the root canal filling process, posing a potential threat to the safety and effectiveness of the treatment. Specifically, due to the lack of a necessary gap between the traditional paste filling needle and the inner wall of the root canal orifice, when the paste is injected into the root canal under high pressure, the pressure inside the root canal orifice cannot be effectively released. This design defect directly leads to the excessive accumulation of pressure, increasing the risk of the paste being overfilled beyond the apex.

[0003] Paste overfilling may not only cause chemical irritation to the periapical tissue, resulting in inflammation or pain, but also affect the adjacent tissues and structures, and even cause more serious complications. In addition, the existence of overfilling limits the accuracy of the treatment, increases the uncertainty of the treatment and the risk to the patient. Therefore, the design limitations of the traditional paste filling needle have become an important factor restricting the safety and effectiveness of root canal treatment, and urgent innovation design and technical improvement are needed to solve this problem. Summary of the Utility Model

[0004] In view of this, the utility model provides a paste filling needle, which forms a gap with the inner wall of the root canal orifice, ensuring that the pressure inside the root canal orifice can be released in time during the paste injection process, avoiding the risk of the paste being overfilled beyond the apex due to excessive pressure, and improving the safety of the treatment.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] A paste filling needle, comprising a seat body, a stainless steel needle connected to the seat body, and a filling member filled at the connection between the seat body and the stainless steel needle. The seat body is provided with an inner cavity and a channel, the inner cavity is communicated with the channel, the channel penetrates through the seat body, a part of the stainless steel needle extends into the channel and completely covers the inner surface of the entire channel, the filling member is arranged at the upper end of the channel, and the outer diameter of the stainless steel needle is 0.23 mm.

[0007] The minimum aperture of a traditional root canal needle is 0.25 mm, while the outer diameter of this filling needle is designed to be 0.23 mm. This tiny difference plays a crucial role in the root canal filling process. Before root canal filling, the root canal aperture prepared on the tooth with a traditional root canal needle is at least 0.25 mm. Therefore, when using this filling needle with an outer diameter of only 0.23 mm for filling, a certain gap is naturally formed between the inner wall of the root canal aperture. This design ensures that during the injection of the paste, the internal pressure of the root canal aperture can be released in a timely manner, avoiding the risk of the paste being overfilled beyond the root tip due to excessive pressure, and enhancing the safety of the treatment. In addition, due to the reduction of the outer diameter of the filling needle, the amount of filling material attached to the needle tip is reduced, which means that while ensuring sufficient filling of the root canal, the waste of materials can be significantly reduced, the treatment cost is lowered, reflecting the dual values of economic benefits and environmental protection concepts.

[0008] Preferably, a groove is provided in the upper part of the seat body, and the groove is located at the upper end of the channel. The filling member includes a filling connection part disposed in the groove and a filling tapered part connected to the filling connection part.

[0009] The groove provided in the upper part of the seat body is located at the upper end of the channel and fits closely with the filling connection part of the filling member. This ensures the stable installation of the filling member, thereby enhancing the connection firmness between the stainless steel needle and the seat body.

[0010] Preferably, a reinforcing ring extending outward is provided in the upper part of the seat body, and the bottom of the filling tapered part fits with the reinforcing ring.

[0011] The reinforcing ring extending outward in the upper part of the seat body fits with the bottom of the filling tapered part. This design not only enhances the mechanical strength of the seat body but also provides additional support for the filling member. The setting of the reinforcing ring effectively ensures the stability and reliability of the filling needle under high-intensity use.

[0012] Preferably, a bend is provided in the middle section of the channel, and a corresponding bend is also provided on the stainless steel needle in the corresponding area.

[0013] The bend design in the middle section of the channel and the bend in the corresponding area on the stainless steel needle enable the filling needle to be more accurately positioned in a complex root canal system. The bend design can help the filling needle better adapt to the natural shape of the root canal, improve the filling efficiency and coverage of the paste, reduce the operation difficulty during the treatment process, and enhance the accuracy and success rate of the treatment.

[0014] Preferably, the outer surface of the stainless steel needle and the inner surface of the channel are in interference fit.

[0015] The outer surface of the stainless - steel needle and the inner surface of the channel adopt an interference - fit design. This precise manufacturing process ensures a tight bond between the stainless - steel needle and the channel, eliminating the gap between them and effectively preventing the leakage or retention of the paste during the filling process. The interference - fit design not only improves the overall structural strength of the filling needle but also ensures the continuity and uniformity of paste filling, providing higher precision and reliability for root canal treatment.

[0016] Preferably, a tapered inclined part is provided at the connection between the inner cavity and the channel.

[0017] The tapered inclined part provided at the connection between the inner cavity and the channel optimizes the flow path of the paste, reduces the flow resistance, ensures the smooth transition of the paste from the inner cavity to the channel, and avoids uneven filling caused by hydrodynamic effects.

[0018] Preferably, the seat body is injection - molded.

[0019] The seat body is processed by injection - molding technology. Injection - molding can achieve high - degree dimensional accuracy and shape complexity, ensuring the structural consistency and functional reliability of the filling needle seat body.

[0020] The beneficial effects of the present utility model compared with the prior art are as follows:

[0021] For the paste filling needle of the present utility model, the minimum aperture of the traditional root canal needle is 0.25 mm, while the outer diameter of this filling needle is designed to be 0.23 mm. This small difference plays a key role in the root canal filling process. Before root canal filling, the root canal aperture made by the traditional root canal needle on the tooth is at least 0.25 mm. Therefore, when using this filling needle with an outer diameter of only 0.23 mm for filling, a certain gap is naturally formed between the filling needle and the inner wall of the root canal hole. This design ensures that during the paste injection process, the internal pressure in the root canal hole can be released in time, avoiding the risk of over - filling the paste beyond the root tip due to excessive pressure and improving the safety of treatment. In addition, due to the reduction of the outer diameter of the filling needle, the amount of filling material adhering to the needle tip is reduced, which means that while ensuring sufficient root canal filling, the waste of materials can be significantly reduced, the treatment cost is lowered, reflecting the dual values of economic benefits and environmental protection concepts. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1This is a structural diagram of a paste filling needle according to an embodiment of the present utility model.

[0024] Figure 2 This is a front view of a paste filling needle according to an embodiment of the present utility model.

[0025] Figure 3 For Figure 1 an enlarged view of area A in Detailed implementation manners

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. The components of the embodiments of the present application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts fall within the scope of protection of the present application.

[0028] It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the embodiments of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the product of this application is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present application.

[0029] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0030] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0031] This embodiment provides a paste filling needle, which includes a seat body 10, a stainless steel needle 20 connected to the seat body 10, and a filling member 30 filled in the first stage at the connection between the seat body 10 and the stainless steel needle 20. The seat body 10 is dug with an inner cavity 11 and a channel 12. The inner cavity 11 is communicated with the channel 12. The channel 12 penetrates the seat body 10. A part of the stainless steel needle 20 extends into the channel 12 and completely covers the inner surface of the entire channel 12. The filling member 30 is arranged at the upper end of the channel 12. The outer diameter of the stainless steel needle 20 is 0.23 mm.

[0032] The minimum aperture of the traditional root canal needle is 0.25 mm, while the outer diameter of this filling needle is designed to be 0.23 mm. This tiny difference plays a key role in the root canal filling process. Before root canal filling, the root canal aperture made on the tooth by the traditional root canal needle is at least 0.25 mm. Therefore, when using this filling needle with an outer diameter of only 0.23 mm for filling, a certain gap is naturally formed between the inner wall of the root canal hole. This design ensures that during the paste injection process, the internal pressure in the root canal hole can be released in time, avoiding the risk of overfilling the paste beyond the root tip due to excessive pressure, and improving the safety of the treatment. In addition, due to the reduction of the outer diameter of the filling needle, the amount of filling material attached to the needle tip is reduced, which means that while ensuring full filling of the root canal, the waste of materials can be significantly reduced, the treatment cost is lowered, reflecting the dual values of economic benefits and environmental protection concepts.

[0033] In this embodiment, a groove 13 is provided on the upper part of the seat body 10. The groove 13 is located at the upper end of the channel 12. The filling member 30 includes a filling connection part 31 arranged in the groove 13 and a filling conical part 32 connected to the filling connection part 31.

[0034] The groove 13 provided on the upper part of the seat body 10 is located at the upper end of the channel 12 and fits closely with the filling connection part 31 of the filling member 30. This ensures the stable installation of the filling member 30, thereby enhancing the connection firmness between the stainless steel needle 20 and the seat body 10.

[0035] In this embodiment, a reinforcing ring 14 extending outward is provided on the upper part of the seat body 10. The bottom of the filling conical part 32 is in contact with the reinforcing ring 14.

[0036] The reinforcing ring 14 extending outward on the upper part of the seat body 10 is in contact with the bottom of the filling conical part 32. This design not only enhances the mechanical strength of the seat body 10 but also provides additional support for the filling member 30. The setting of the reinforcing ring 14 effectively ensures the stability and reliability of the filling needle under high-intensity use.

[0037] In this embodiment, a bend is provided in the middle section of the channel 12, and a corresponding bend is also provided on the stainless steel needle 20 in the corresponding area.

[0038] The bending design in the middle section of the channel 12 and the corresponding bending on the stainless steel needle 20 enable the filling needle to be more accurately positioned in a complex root canal system. The bending design helps the filling needle better adapt to the natural shape of the root canal, improves the filling efficiency and coverage of the paste, reduces the operation difficulty during the treatment process, and enhances the accuracy and success rate of the treatment.

[0039] In this embodiment, the outer surface of the stainless steel needle 20 has an interference fit with the inner surface of the channel 12.

[0040] The design of the interference fit between the outer surface of the stainless steel needle 20 and the inner surface of the channel 12, this precise manufacturing process ensures the tight combination between the stainless steel needle 20 and the channel 12, eliminates the gap between the two, and effectively prevents the leakage or retention of the paste during the filling process. The interference fit design not only improves the overall structural strength of the filling needle but also ensures the continuity and uniformity of the paste filling, providing higher accuracy and reliability for root canal treatment.

[0041] In this embodiment, a tapered inclined portion 15 is provided at the connection between the inner cavity 11 and the channel 12.

[0042] The tapered inclined portion 15 provided at the connection between the inner cavity 11 and the channel 12 optimizes the flow path of the paste, reduces the flow resistance, ensures the smooth transition of the paste from the inner cavity 11 to the channel 12, and avoids uneven filling caused by hydrodynamic effects.

[0043] In this embodiment, the seat body 10 is injection molded.

[0044] The seat body 10 adopts the injection molding process. Injection molding can achieve high dimensional accuracy and shape complexity, ensuring the structural consistency and functional reliability of the filling needle seat body 10.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A paste filling needle, characterized in that: It includes a seat body, a stainless steel needle connected to the seat body, and a filling piece filled at the connection between the seat body and the stainless steel needle. The seat body is dug with an inner cavity and a channel. The inner cavity is connected to the channel. The channel runs through the seat body. The stainless steel needle partially extends into the channel and completely covers the inner surface of the entire channel. The filling piece is arranged at the upper end of the channel. The outer diameter of the stainless steel needle is 0.23mm.

2. The paste filling needle according to claim 1, characterized in that: The upper part of the seat body is provided with a groove, and the groove is located at the upper end of the channel. The filling piece includes a filling connection part arranged in the groove, and a filling conical part connected to the filling connection part.

3. The paste filling needle according to claim 2, characterized in that: The upper part of the seat body is provided with a reinforcement ring extending outward, and the bottom of the filling cone portion is in contact with the reinforcement ring.

4. The paste filling needle according to claim 1, characterized in that: The middle section of the channel is provided with a bend, and the corresponding area on the stainless steel needle is also provided with a bend.

5. The paste filling needle according to claim 1, characterized in that: The outer surface of the stainless steel needle is interference fit with the inner surface of the channel.

6. The paste filling needle according to claim 1, characterized in that: A gradually tapered portion is provided at the connection point between the inner cavity and the channel.

7. The paste filling needle according to claim 1, characterized in that: The seat body is injection molded.

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