Working needle, heat carrier and temperature control method of heat carrier

Abstract

The invention relates to the field of root canal therapy, in particular to a working needle, a heat carrier and a temperature control method of the heat carrier. The working needle is used for heating filler of a root canal and comprises a main body structure and a refrigeration assembly. The main body structure is provided with a working tip, and the refrigeration assembly is at least partially located in the main body structure and used for reducing the temperature of the working tip inserted into the root canal so as to cool filler located in the root canal. When the working needle is used, filler originally existing in the root canal needs to be removed, and after the original filler is melted, the working needle extends into the root canal. The refrigeration assembly is started to refrigerate the working tip of the working needle, the refrigerated working tip can solidify the filler again, and when the working needle is pulled out of the root canal, the filler attached to the working needle can be taken out together.

Description

Technical Field

[0001] This patent relates to the field of root canal treatment, and in particular to a working needle, a heat carrier, and a temperature control method of the heat carrier. Background Art

[0002] During root canal treatment, filling materials need to be injected into the root canal to seal the root canal and prevent it from getting worse. However, during the treatment process, the same root canal often needs to be treated multiple times, and the original filling materials in the root canal need to be removed before each new treatment.

[0003] When removing the old filling, it is usually necessary to insert an externally heated working needle into the root canal to heat the old filling to liquefy it, and then wait for it to cool naturally for a short period of time so that the solidified filling adheres to the working needle. Then the working needle and the filling are removed.

[0004] In the process of removing the filling material, the working needle often needs to be moved in and out of the root canal several times. Each time it takes a short period of time to wait for natural cooling, the total time is long, which affects the efficiency of the treatment. Summary of the invention

[0005] In order to solve or at least partially solve the above technical problems, this patent provides a working needle and a heat carrier.

[0006] The present invention provides a working needle for heating a filling material in a root canal. The working needle comprises: a main structure and a cooling component. The main structure has a working tip. The cooling component is at least partially located inside the main structure and is used to reduce the temperature of the working tip inserted into the root canal to cool the filling material in the root canal.

[0007] Preferably, the refrigeration assembly includes: a refrigeration component and a refrigeration source. The refrigeration component is located inside the main structure and is used to take away the heat at the working tip to reduce the temperature at the working tip. The refrigeration source is connected to the refrigeration component to reduce the temperature of the refrigeration component.

[0008] Preferably, the cooling component is a heat transfer wire, and the cooling source is a semiconductor cooling plate. The heat transfer wire is connected to the cold end of the semiconductor cooling plate to reduce the temperature of the heat transfer wire through the semiconductor cooling plate.

[0009] Preferably, the refrigeration component is a condenser tube, which is located inside the main structure, and condensate circulates in the condenser tube. The refrigeration source is a refrigeration pump, which is connected to the condenser tube to drive the condensate to flow in the condenser tube and reduce the temperature of the condensate.

[0010] Preferably, a sliding channel is provided in the main structure. The working needle further comprises: a sliding component. The sliding component is provided in the sliding channel and slides along the sliding channel. The sliding component is provided with a vent hole penetrating the main body along its length direction so as to discharge the air in the sliding channel when the sliding component slides. The sliding device is connected to the sliding component to control the movement of the sliding component. The refrigeration component is provided on the sliding component and moves with the sliding component.

[0011] Preferably, the main structure includes: a straight rod and a shell. A hollow cavity is provided inside the straight rod to lay the power supply pipeline of the refrigeration component; a through hole is opened on the side wall of the straight rod, and the power supply pipeline extends outward through the hole. The shell is sleeved on the end of the straight rod, and the refrigeration component is arranged in the shell and connected to the power supply pipeline.

[0012] Preferably, the working needle further comprises: a heating component. The heating component is used to heat the working tip inserted into the root canal to heat the filling material in the root canal. The working needle further comprises: a temperature control device. The temperature control device is used to detect the temperature in the working tip.

[0013] A heat carrier includes the above-mentioned working needle and a control module. The control module is connected to the working needle in communication to control the cooling of the working needle.

[0014] A method for controlling the temperature of a working needle, the control method comprising:

[0015] In response to a switch signal from a user, the heating component is activated to heat the working tip of the working needle.

[0016] In response to the refrigeration start signal, the refrigeration component is started to cool the working tip.

[0017] Preferably, before the step of starting the refrigeration component, the method further comprises:

[0018] After the working tip is heated to the preset temperature, a first preset time is delayed to generate a refrigeration start signal.

[0019] Compared with the prior art, this patent sets a refrigeration component in the main structure. When the melted original filling material is re-condensed, the temperature of the main structure can be lowered by simply operating the refrigeration component. There is no need to cool the shampoo head by external cooling methods during use. Thanks to the autonomous cooling inside the main structure, the shampoo head can always maintain a low temperature during the cooling process of the filling material, thereby improving the condensation effect of the original filling material. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the implementation of this patent, the following is a brief introduction to the relevant drawings. It can be understood that the drawings described below are only used to illustrate some implementations of this patent, and ordinary technicians in this field can also obtain many other technical features and connection relationships not mentioned in this article based on these drawings.

[0021] Figure 1 It is a three-dimensional schematic diagram of a working needle in an embodiment of the present patent;

[0022] Figure 2 This is a schematic diagram of the internal structure of a working needle in an embodiment of the present patent;

[0023] Figure 3 It is a three-dimensional schematic diagram of a sliding component of a working needle in an embodiment of the present patent;

[0024] Figure 4 This is a schematic diagram of the internal structure of a working needle in an embodiment of the present patent;

[0025] Figure 5 It is a partial enlarged view of a sliding part of a working needle in an embodiment of the present patent;

[0026] Figure 6 This is a schematic diagram of the surface barbs on the working tip of a working needle in an embodiment of the present patent;

[0027] Figure 7 This is a schematic diagram of the surface barbs on the working tip of a working needle in an embodiment of the present patent;

[0028] Figure 8 It is a schematic diagram of the structure of a heat carrier according to an embodiment of the present patent;

[0029] Fig. 9 This is a flow chart of a control method for a working needle in an implementation mode of this patent.

[0030] Description of reference numerals:

[0031] 1. Main structure; 11. Working tip; 111. Barb; 12. Slide groove; 2. Refrigeration component; 3. Sliding part; 31. Vent hole; 32. Sliding device. DETAILED DESCRIPTION

[0032] The patent is described in detail below in conjunction with the accompanying drawings.

[0033] At present, during the process of root canal retreatment, it is necessary to use a rinsing file to clean the inside of the root canal. Specifically, many patients are not undergoing treatment for the first time, and there will be apical glue used for sealing in the root canal of the affected tooth. When a new treatment is performed, the apical glue remaining in the root canal needs to be removed and the root canal needs to be cleaned.

[0034] However, the remaining gutta-percha tip has solidified, and the working tip 11 of the working needle used to remove the remaining filling is difficult to insert and remove the filling. Therefore, before treatment, the working tip 11 of the working needle needs to be heated by external heating, and the heated working tip 11 is inserted into the root canal to melt the solidified gutta-percha by high temperature. After the remaining gutta-percha melts, the working tip 11 is taken out and the temperature of the working tip 11 is lowered by external cooling. After the temperature of the working tip 11 drops, it is inserted into the melted gutta-percha, and the gutta-percha is re-solidified by the low temperature of the working tip 11. The re-solidified gutta-percha can wrap the working tip 11, and the gutta-percha can be taken out together when the working tip 11 is pulled out.

[0035] When this type of treatment is performed, the working tip 11 needs to be cooled by external equipment so that the working tip 11 can be reduced from its original high temperature to a low temperature that can solidify the dental cement tip. The cooling process takes a long time, so the dental cement in the root canal may solidify again, making it impossible for the working tip 11 to be inserted into the root canal, and multiple repeated heating and cooling operations are required.

[0036] In view of this, the first embodiment of this patent proposes a working needle to solve the above technical problems.

[0037] First embodiment

[0038] refer to Figure 1 , Figure 2 The patent provides a working needle for heating the filling material of the root canal. The working needle includes: a main structure 1 and a cooling component 2. The main structure 1 has a working tip 11. The cooling component 2 is at least partially located inside the main structure 1, and is used to reduce the temperature of the working tip 11 inserted into the root canal to cool the filling material in the root canal.

[0039] Root canal therapy is a main method for treating pulp and periapical diseases. Its purpose is to remove most of the infected materials in the root canal by mechanical and chemical methods, and to prevent the occurrence of periapical lesions or promote the healing of existing periapical lesions by filling the root canal and sealing the crown. The steps of root canal therapy include root canal preparation, root canal irrigation, root canal filling and root canal sealing.

[0040] During the root canal preparation process, instruments such as nickel-titanium files are used to mechanically prepare the root canal to remove the infection and form the appropriate root canal shape. Root canal irrigation uses irrigation solutions such as sodium hypochlorite to disinfect and clean the root canal. When filling the root canal, commonly used materials include dental cusp glue.

[0041] During the root canal treatment, after the heated working tip 11 melts the dental cusp glue in the root canal, the working tip 11 of the working needle can be inserted into the inside more easily. At this time, the working tip 11 always remains in the internal state, and the refrigeration component 2 is started to reduce its temperature through the inside of the working tip 11. The working tip 11 after the temperature is reduced can absorb the heat of the dental cusp glue wrapped outside, so that its temperature is reduced and solidified into a solid state. At this time, the working tip 11 has been completely inserted into the dental cusp glue. When the working needle is extracted, the working tip 11 can be taken out from the inside of the root canal, and the dental cusp glue is taken out together.

[0042] The working tip 11 of the working needle in the present application can cool itself from the inside, and there is no need to remove the working tip 11 from the root canal for natural cooling after heating, so as to avoid the melted dental glue in the root canal solidifying again due to too long a time waiting for cooling. In addition, the working tip 11 of the working needle in the present embodiment is always kept in the root canal during the cooling process, and the insertion depth can be adjusted according to the demand to ensure the insertion depth of the working tip 11 in the root canal, reduce the situation where the insertion depth of the working tip 11 is changed due to the secondary insertion during the cooling process, and improve the success rate of dental glue removal.

[0043] During the process of the refrigerated working tip 11 solidifying the dental glue in the root canal and removing it, since the working tip 11 is vertically inserted into the filling after the dental glue solidifies, the removal mainly relies on the friction and viscosity between the outer wall of the working tip 11 and the filling. In the process of the working tip 11 being lifted, the working tip 11 and the filling may separate, resulting in the inability to completely remove the filling.

[0044] In view of this, in reference Figure 6 and Figure 7 In the illustrated embodiment, a plurality of barbs 111 may be provided on the outer surface of the working tip 11. When the dental cusp glue in the root canal solidifies again, the barbs 111 hook into the filling material, increasing the friction between the outer surface of the working tip 11 and the filling material, while reducing the probability of the working tip 11 being separated from the filling material during the extraction process, so that the working tip 11 can fully remove the solidified dental cusp glue, thereby improving the work efficiency during the treatment process.

[0045] Second embodiment

[0046] The second embodiment of the present application provides a working needle. The second embodiment is a further improvement of the first embodiment, and the main improvement is that the refrigeration assembly 2 includes: a refrigeration component and a refrigeration source. The refrigeration component is located inside the main structure 1 and is used to take away the heat at the working tip 11 to reduce the temperature at the working tip 11. The refrigeration source is connected to the refrigeration component to reduce the temperature of the refrigeration component.

[0047] During the cooling process, it is necessary to actively lower the temperature to remove the heat around the working tip 11 so that the surrounding dental glue can solidify after the working tip 11 is inserted. The solidification effect of the dental glue depends on the temperature of the working tip 11 and the temperature distribution of the working tip 11 during the cooling process. When the temperature distribution on the outer surface of the working tip 11 is uniform and the temperature is low enough, it can have a better effect on the surrounding dental glue, so that the dental glue is evenly solidified and easy to remove, avoiding the situation where the filling on one side has solidified while the filling on the other side remains in a melted state and cannot be removed together with the working tip 11.

[0048] The cooling component can be evenly distributed inside the working tip 11. When the cooling component is working, the outer surface of the working tip 11 will also be evenly cooled, and the heat of the dental glue around the working tip 11 can also be evenly absorbed, so that it gradually solidifies. In this state, the solidified filling material is evenly absorbed by the heat, so that its interior is solidified, the integrity is stronger, and it is easy to be taken out as a whole.

[0049] The cooling source can provide a stable low temperature for the cooling component, so that the temperature of the cooling component continues to decrease and remains at a low temperature during the solidification of the dental glue. Even if the working tip 11 absorbs heat from the dental glue, it can always maintain the cooled temperature, ensuring the solidification effect of the dental glue.

[0050] Furthermore, the cooling component may be a heat transfer wire, and the cooling source may be a semiconductor cooling plate. The heat transfer wire is connected to the cold end of the semiconductor cooling plate, so that the temperature of the heat transfer wire is reduced by the semiconductor cooling plate.

[0051] The semiconductor refrigeration plate is composed of two semiconductor materials, N-type and P-type, which are connected to form an electric couple and generate heat transfer. When the current flows from the N-type semiconductor to the joint of the P-type semiconductor, it absorbs the surrounding heat to form a cold end, thereby generating a cooling effect. One end of the heat transfer wire is connected to the cold end of the semiconductor refrigeration plate, and the other end is evenly distributed around the inside of the working tip 11. When the semiconductor refrigeration plate is working, the cold end absorbs the heat from the heat transfer wire connected to it, causing the temperature of the heat transfer wire to drop. After the temperature drops, the heat transfer wire will generate heat transfer with the working tip 11, and the heat on the working tip 11 will be transferred to the heat transfer wire, thereby reducing the temperature of the working tip 11. Similarly, when the temperature of the working tip 11 drops, the heat of the dental tip glue around the working tip 11 will also gradually transfer to the working tip 11, so that the dental tip glue will gradually solidify.

[0052] More specifically, since the working needle is small in size, the semiconductor refrigeration sheet is also small in size and does not generate pollutants during operation, it can be fitted inside the main structure 1 and is easy to install. At the same time, the cooling effect of the semiconductor refrigeration sheet can make the temperature difference between the cold end and the hot end reach 40°-65°, meeting the solidification requirements of the working tip 11 for the dental glue.

[0053] The solidification process of dental glue depends not only on temperature, but also on the composition and physical properties of the material.

[0054] Third embodiment

[0055] In the second embodiment, the working tip 11 is cooled by the cooperation of a semiconductor refrigeration plate and a heat transfer wire. However, the semiconductor refrigeration plate has not only a cold end but also a hot end during operation. The heat released by the hot end may cause local heating, causing discomfort to the user or affecting the cooling effect of the cold end.

[0056] In view of this, in the third embodiment of the present application, further improvements are made based on the second embodiment, and the main improvement is that the refrigeration component is a condenser tube, the condenser tube is located inside the main structure 1, and condensate circulates in the condenser tube. The refrigeration source is a refrigeration pump, which is connected to the condenser tube to drive the condensate to flow in the condenser tube and reduce the temperature of the condensate.

[0057] The condenser is evenly wound inside the working tip 11, and both ends of the condenser are connected to the refrigeration pump, so that the condensate circulates continuously inside the condenser under the drive of the refrigeration pump. The condensate can take away the heat in the environment during the flow process, so the heat of the working tip 11 can be taken away by the flow of the condensate, thereby reducing the temperature of the working tip 11. Since the condensate always keeps circulating under the drive of the refrigeration pump, when the condensate absorbs heat and flows back into the refrigeration pump, its temperature will be reduced again under the action of the refrigeration pump, and the repetitive cycle ensures the refrigeration efficiency. At the same time, the circulation speed and refrigeration speed of the condensate are relatively fast, which improves the refrigeration efficiency and effect of the working tip 11. The working principle of the condenser is to use the heat exchange principle to take away the heat through the circulation of the condensate. The condenser is usually composed of an inner tube and an outer tube, the inner tube is used to transmit the condensate, and the outer tube is used for cooling.

[0058] In addition, Figure 4 , Figure 5 As shown, the main structure 1 includes: a straight rod and a shell. A hollow cavity is provided inside the straight rod to lay the power supply pipeline of the refrigeration component 2; a through hole is opened on the side wall of the straight rod, and the power supply pipeline extends outward through the hole. The shell is sleeved on the end of the straight rod, and the refrigeration component is arranged in the shell and connected to the power supply pipeline.

[0059] The hollow cavity in the straight rod portion can not only be used to set up the power supply pipeline, but also provide additional structural strength and reduce the overall weight. The design of the hollow cavity protects the pipeline located in the main structure 1 that supplies power to the refrigeration component to avoid being affected by the humid environment in the root canal during operation. In order to ensure long-term use, the power supply pipeline and the hollow cavity are usually made of corrosion-resistant materials such as stainless steel or special plastics. The through hole on the straight rod portion allows the power supply pipeline to extend from the inside of the hollow cavity and connect to the refrigeration component 2, reducing the entanglement of the power supply pipeline inside the shell, so that the refrigeration component 2 can be evenly distributed in the shell. This layout not only ensures power supply, but also improves the cooling effect, reduces the possibility of local overheating, and thus extends the service life of the equipment.

[0060] Fourth embodiment

[0061] In the second and third embodiments, a refrigeration component 2 is provided in the main structure 1, and the refrigeration component 2 refrigerates the working tip 11 to solidify the melted dental glue. However, before this, the working tip 11 needs to be heated, and the filling material that was originally kept in a solidified state is melted by the heated working tip 11. However, the heating of the working tip 11 often requires the help of external equipment, and the refrigeration component 2 provided in the working tip 11 may be affected during the heating process.

[0062] In view of this, further improvements are made based on the second and third embodiments, the main improvements are that, referring to Figure 2 , Figure 3 The main structure 1 is provided with a sliding channel. The working needle further includes a sliding component 3. The sliding component 3 is provided in the sliding channel and slides along the sliding channel. The sliding component 3 is provided with a vent hole 31 penetrating the main body thereof along its length direction so as to discharge the air in the sliding channel when the sliding component 3 slides. The sliding device 32 is connected to the sliding component 3 to control the movement of the sliding component 3. The refrigeration component is provided on the sliding component 3 and moves with the sliding component 3.

[0063] It is not difficult to see that the refrigeration component 2 is arranged on the sliding part 3 and can move together with the sliding part 3, and the sliding device 32 can control the movement of the sliding part 3. When the working tip 11 of the working needle needs to be heated, the sliding component is controlled to move by manipulating the sliding device 32, and the refrigeration component 2 is driven to move to the working tip 11 in the sliding channel. At this time, the heating of the working tip 11 will not affect the refrigeration component 2, thereby reducing the influence of the excessive temperature of the working tip 11 on the refrigeration component 2.

[0064] Furthermore, since the sliding component 3 needs to move in the sliding channel, Figure 2 and Figure 3It is not difficult to see that when the sliding component 3 slides in the sliding channel, the air in the sliding channel will be squeezed, and the compressed air will hinder the movement of the sliding component 3, resulting in an increase in the resistance to the movement of the refrigeration component 2. The vents 31 arranged along the length direction of the sliding component 3 can allow the air originally in the sliding channel to be gradually discharged through the vents 31 during the movement of the sliding component 3, thereby avoiding the accumulation of air in the sliding channel and ensuring the smooth operation of the sliding component 3. The vents 31 can not only discharge the air in the sliding channel, but also prevent the pressure difference generated during the movement of the sliding component 3.

[0065] More specifically, refer to Figure 4 and Figure 5 A slide groove 12 may be provided on the outer surface of the main structure 1, and the sliding device 32 is connected to the sliding component 3 arranged in the sliding channel through the slide groove 12. The movement of the sliding component 3 can be controlled by manipulating the sliding device 32 to slide along the slide groove 12. At the same time, the slide groove 12 can limit the moving range of the sliding device 32, and the moving space of the sliding component 3 is controlled by limiting the moving range of the sliding device 32. When the sliding device 32 is located at both ends of the slide groove 12, the refrigeration component 2 arranged on the sliding component 3 can be in the working position and the avoidance position respectively, so as to ensure that the refrigeration component 2 can be accurately used for refrigeration work and effectively avoid when the heating working tip 11 is used. The sliding component 3 and the sliding channel are usually made of wear-resistant materials, such as high-strength plastic or metal, to ensure their durability under high-frequency use.

[0066] The present application also discloses a method for using a working needle, which is applicable to the working needle in the fourth embodiment. The specific method for using is as follows:

[0067] The sliding device 32 is started to drive the sliding component 3 to carry the refrigeration assembly 2 to move in a direction away from the working tip 11;

[0068] When the sliding component 3 carrying the refrigeration assembly 2 leaves the working tip 11, the sliding device 32 is closed to keep the sliding component 3 stationary;

[0069] Starting the heating component to heat the working tip 11;

[0070] In response to the high temperature signal, turning off the heating component to stop heating the working tip 11;

[0071] Start the sliding device 32 to drive the sliding component 3 to carry the refrigeration assembly 2 to move toward the working tip 11;

[0072] When the sliding component 3 carrying the refrigeration assembly 2 reaches the working tip 11 , the sliding device 32 is closed to keep the sliding component 3 stationary.

[0073] When heating the working tip 11 of the working needle, first move the refrigeration component 2 set in the main structure 1 and move it away from the working tip 11 to reduce the impact of the refrigeration component 2 on the refrigeration component 2 during the heating process of the working tip 11. When the temperature of the working tip 11 reaches the target high temperature, it can be used to melt the dental cusp glue in the root canal. After the dental cusp glue is melted, the working tip 11 can be fully extended into the root canal. At this time, the refrigeration component 2 in the main structure 1 is sent back to the working tip 11, so that the refrigeration component 2 cools down the working tip 11. The cooled working tip 11 can absorb the heat of the dental cusp glue in the root canal, causing it to re-solidify and wrap the working tip 11. At this time, the dental cusp glue can be taken out of the root canal by taking out the working tip 11.

[0074] Fifth embodiment

[0075] The working needle needs to heat the working tip 11 externally during operation, and the heated working tip 11 melts the dental cement in the root canal. However, the use of external heating equipment makes the treatment process complicated.

[0076] In view of this, in the fifth embodiment of the present application, the working needle further includes: a heating component. The heating component is used to heat the working tip 11 inserted into the root canal to heat the filling material in the root canal. The working needle further includes: a temperature control device. The temperature control device is used to detect the temperature inside the working tip 11.

[0077] When it is necessary to heat the dental cement in the root canal, the heating component is turned on, and the temperature of the working tip 11 is raised and reaches the working temperature through the heating component. The temperature control device can detect the temperature of the working tip 11 in real time. Since the working tip 11 needs to be heated and cooled separately during operation, whether the temperature of the working tip 11 meets the working requirements will affect the progress of the treatment. The temperature control device can monitor the temperature of the working tip 11 in real time and feed it back to the user to ensure that the treatment work is carried out only after the temperature of the working tip 11 reaches the specified temperature.

[0078] In addition, reference Fig. 9 The present application also discloses a temperature control method for a working needle applicable to the working needle in the sixth embodiment. Specifically, the control method includes:

[0079] S1. In response to a switch signal from a user, the heating component is started to heat the working tip 11 of the working needle.

[0080] S2. In response to a refrigeration start signal, the refrigeration component 2 is started to cool the working tip 11.

[0081] Before the step of starting the refrigeration component 2, the method further includes:

[0082] S3. After the working tip 11 is heated to a preset temperature, a first preset time is delayed to generate a refrigeration start signal.

[0083] When the user opens the working needle, the residue in the root canal needs to be melted first so that the working tip 11 can be inserted into the root canal. The heating component continuously heats the working tip 11 of the working needle to the working temperature by means of resistance heating or induction heating, and extends the heated working tip 11 into the root canal to melt the dental cusp glue in the root canal. After the dental cusp glue melts, the working tip 11 can be fully inserted into the root canal, and wait for a preset time after insertion to ensure that the dental cusp glue in the root canal has been completely melted. After the working tip 11 is fully inserted into the root canal, the refrigeration component 2 of the working needle starts working to cool down the working tip 11. The refrigeration component 2 is not only used for cooling, but also to prevent damage caused by overheating of the working tip 11. After the temperature of the working tip 11 is reduced, the working tip 11 can absorb the heat of the dental cusp glue wrapped on its outer surface. After the heat of the dental cement is transferred to the working tip 11, they will solidify again. At this time, the working tip 11 is completely inside the solidified filling. By taking out the working tip 11, the old filling wrapped around the working tip 11 can be taken out together.

[0084] The working tip 11 and the cooling assembly 2 are usually made of high temperature resistant materials, such as titanium alloy or special ceramics, to ensure their stability in high temperature environments. During the heating and cooling process, the operator needs to accurately control the temperature and time to ensure that the dental glue is completely melted and solidified.

[0085] Sixth Embodiment

[0086] refer to Figure 8 As shown, this embodiment discloses a heat carrier, which includes the working needle mentioned in any one of the first to fifth embodiments. As an improvement, the heat carrier also includes: a control module. The control module is in communication connection with the working needle to control the cooling of the working needle.

[0087] The control module can control the cooling function of the working needle and control when the melted filling material in the root canal needs to be cooled. The control module can also accurately control the cooling of the heat carrier so that the cooling temperature of the working tip 11 meets the working requirements, thereby improving the solidification efficiency and firmness of the dental cusp glue in the root canal.

[0088] Finally, it should be noted that ordinary technicians in this field can understand that in order to make readers better understand this patent, the implementation methods of this patent propose many technical details. However, even without these technical details and various changes and modifications based on the above-mentioned implementation methods, the technical solutions claimed for protection by the claims of this patent can be basically realized. Therefore, in practical applications, various changes can be made to the above-mentioned implementation methods in form and details without departing from the spirit and scope of this patent.

Claims

1. A working needle for heating a filling material of a root canal; characterized in that: include: A main structure having a working tip; A cooling assembly is at least partially located inside the main structure and is used to reduce the temperature of the working tip inserted into the root canal to cool the filling material in contact with the working tip.

2. The working needle according to claim 1, characterized in that: The refrigeration assembly comprises: A refrigeration component, located inside the main structure, used to take away the heat at the working tip to reduce the temperature at the working tip; A refrigeration source is connected to the refrigeration component to reduce the temperature of the refrigeration component.

3. The working needle according to claim 2, characterized in that: The refrigeration component is a heat transfer wire, and the refrigeration source is a semiconductor refrigeration sheet; The heat transfer wire is connected to the cold end of the semiconductor refrigeration plate to reduce the temperature of the heat transfer wire through the semiconductor refrigeration plate.

4. The working needle according to claim 2, characterized in that: The refrigeration component is a condenser tube, which is located inside the main structure, and condensate circulates in the condenser tube; The cooling source is a cooling pump, which is connected to the condenser pipe to drive the condensate to flow in the condenser pipe and reduce the temperature of the condensate.

5. The working needle according to claim 2, characterized in that: A sliding channel is provided in the main structure; The working needle also includes: A sliding component, disposed in the sliding channel and sliding along the sliding channel; The sliding component is provided with a vent hole penetrating the body thereof along its length direction so as to discharge the air in the sliding channel when the sliding component slides; A sliding device connected to the sliding component to control the movement of the sliding component; The refrigeration component is arranged on the sliding component and moves along with the sliding component.

6. The working needle according to claim 2, characterized in that: The main structure comprises: The straight rod portion has a hollow cavity inside for laying the power supply pipeline of the refrigeration assembly; a through hole is opened on the side wall of the straight rod portion, and the power supply pipeline extends outward through the through hole; The shell is sleeved on the end of the straight rod portion, and the refrigeration component is arranged in the shell and connected to the power supply pipeline.

7. The working needle according to claim 2, characterized in that: The working needle also includes: A heating component, used for heating the working tip inserted into the root canal to heat the filling material in the root canal; The working needle also includes: The temperature control device is used to detect the temperature inside the working tip.

8. A heat carrier, characterized in that: The heat carrier comprises a working needle as described in any one of claims 1 to 7; The heat carrier also includes: A control module is connected to the working needle for controlling the cooling of the working needle.

9. A method for controlling the temperature of a working needle, characterized in that: The control method comprises: In response to a switch signal from a user, a heating component is activated to heat a working tip of the working needle; In response to a refrigeration start signal, the refrigeration component is started to cool the working tip.

10. The temperature control method of the working needle according to claim 9, characterized in that: Before the step of starting the refrigeration component, the method further includes: After the working tip is heated to a preset temperature, a first preset time is delayed to generate the refrigeration start signal.

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