Injection system, injection method and injection filler for filling hot melt gutta-percha

Abstract

The invention discloses an injection system, an injection method and an injection filler for filling hot melt gutta-percha, and relates to the technical field of root canal therapy, the action of a pushing block is controlled by temperature, and under the condition that the real-time temperature of a gutta-percha stick injection channel reaches a first preset temperature, the pushing block moves towards a gutta-percha output channel, and the gutta-percha stick injection channel is closed. The push block can push the gutta-percha stick to move towards the gutta-percha output channel, so that the space between the push block and the gutta-percha output channel is filled with the heated and softened gutta-percha stick. Under the condition that the pushing force output by the pushing block reaches the first pushing force, the gutta-percha stick is densely arranged in the gutta-percha stick injection channel, so that the gutta-percha stick completes alignment operation in the heating process, gutta-percha can be immediately output through the gutta-percha output channel when a user needs to inject gutta-percha, and the waiting time of the user is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of root canal treatment, and in particular to an injection system, an injection method and an injection filler for hot-melt gutta-percha filling. Background Art

[0002] Root canal therapy, also known as endodontic treatment, is a surgical procedure in dentistry to treat pulp necrosis and root infection. The principle of root canal therapy is to remove most of the infected substances in the root canal by mechanical or chemical methods, and to prevent periodontal disease or promote periapical healing of lesions by filling the root canal and sealing the crown. At present, the most commonly used method for root canal filling is to heat and soften gutta-percha, and then inject the softened gutta-percha into the root canal area to be treated for filling.

[0003] The existing injection filler generally places the gutta-percha stick into the gutta-percha stick injection chamber of the injection filler, then heats the gutta-percha stick in the gutta-percha stick injection chamber to melt the gutta-percha stick, and pushes the melted gutta-percha into the injection needle of the injection filler through a pushing device, and finally injects the gutta-percha into the root canal through the injection needle.

[0004] Since gutta-percha is solid when placed, the volume of the gutta-percha stick injection cavity is usually larger than that of the gutta-percha stick, so that the gutta-percha stick can be placed in the gutta-percha stick injection cavity more easily. At the same time, since there is a lack of industry standards for the size of gutta-percha sticks, the outer diameters and lengths of gutta-percha sticks from different manufacturers vary. In this way, in order to make the injection filler more universal, the injection filler usually configures the inner diameter of the gutta-percha stick injection cavity with the maximum size, so that there is a larger gap between the gutta-percha stick and the gutta-percha stick injection cavity. As a result, when the operator heats the gutta-percha stick and performs the first injection, the gutta-percha in the molten state only occupies part of the space in the injection cavity of the gutta-percha stick. During the initial injection period, the pushing device moves toward the injection needle in the gutta-percha stick injection cavity, and can only push the air in the gutta-percha stick injection cavity to escape from the injection needle, but cannot push the gutta-percha out, until the pushing device travels a certain distance, so that the remaining volume of the gutta-percha stick injection cavity matches the volume of the gutta-percha in the molten state, and the gutta-percha can completely fill the remaining space in the gutta-percha stick injection cavity before the gutta-percha can flow out from the injection needle. This will undoubtedly increase the waiting time for patients and operators, and it is difficult for operators to judge the exact time when the gutta-percha flows out, nor is it possible to judge the actual amount of remaining gutta-percha in the gutta-percha stick injection cavity, resulting in a poor user experience. Summary of the invention

[0005] The object of the present invention is to provide an injection system, an injection method and an injection filler for hot-melt gutta-percha filling, by automatically adjusting the position of a pushing device during the heating of the gutta-percha so that the volume of the gutta-percha matches the volume of the injection cavity of a gutta-percha stick, so as to solve the problem that the existing injection filler needs to wait for the glue to be discharged during the first injection after heating, resulting in inconvenience in use.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] An injection system for hot melt gutta-percha filling, comprising:

[0008] A gutta-percha injection channel to place a gutta-percha stick;

[0009] A gutta-percha output channel is connected to the gutta-percha stick injection channel, and the inner diameter of the gutta-percha output channel is smaller than the inner diameter of the gutta-percha stick injection channel;

[0010] a heating unit connected to the gutta-percha output channel to heat the gutta-percha output channel;

[0011] A pushing block extends into the gutta-percha injection channel and is capable of moving along the gutta-percha injection channel toward the gutta-percha output channel; and

[0012] A controller is used to control the action of the pushing block, and the controller is configured to:

[0013] Obtain the first preset temperature T1 and the real-time temperature T of the gutta-percha injection channel 实时 and a first driving force of the driving block;

[0014] The real-time temperature T of the gutta-percha injection channel 实时 When the first preset temperature T1 is reached, the pushing block is moved toward the gutta-percha output channel;

[0015] When the thrust output by the pushing block reaches the first thrust, the pushing block is stopped from moving.

[0016] In some embodiments, the injection system further comprises:

[0017] A thrust information unit, used to obtain thrust information of the pushing block, and the thrust information unit is communicatively connected with the controller to transmit the acquired thrust information to the controller;

[0018] A temperature information unit is used to obtain the temperature information of the gutta-percha output channel, and the temperature information unit is connected to the controller to communicate with the controller to obtain the real-time temperature T of the gutta-percha injection channel. 实时 transmitted to the controller.

[0019] In some embodiments, the injection system further comprises:

[0020] A position information unit, used to obtain the position of the push block in the gutta-percha injection channel, the position information unit at least comprising:

[0021] A first sensing element is disposed at one end of the gutta-percha stick injection channel away from the gutta-percha output channel and is capable of sensing the push block to generate a start position signal of the push block;

[0022] The second sensing element is disposed at one end of the entrance of the gutta-percha output channel and is capable of sensing the pushing block to generate an end position signal of the pushing block.

[0023] The present application also provides an injection method for hot melt gutta-percha filling, which specifically comprises the following steps:

[0024] Obtaining a first preset temperature T1 of the gutta-percha output channel and a first driving force of the driving block;

[0025] Putting a gutta-percha stick into the gutta-percha output channel, and heating the gutta-percha output channel;

[0026] Get the real-time temperature T of the gutta-percha injection channel 实时 , and the real-time temperature T of the gutta-percha injection channel 实时 When the first preset temperature T1 is reached, the pushing block is moved toward the gutta-percha output channel;

[0027] The thrust output by the pushing block is obtained, and when the thrust output by the pushing block reaches a first thrust, the pushing block is stopped from moving.

[0028] In some embodiments, the injection method further comprises the following steps:

[0029] Obtaining a second preset temperature T2, wherein the second preset temperature T2 is greater than the first preset temperature T1, and the second preset temperature T2 and the first preset temperature T1 satisfy: 0.6T2≤T1≤0.8T2;

[0030] When the pushing block moves toward the gutta-percha output channel, the gutta-percha output channel is continuously heated, so that the real-time temperature T of the gutta-percha stick injection channel is 实时 Reaching a second preset temperature T2;

[0031] The gutta-percha output channel is continuously heated, and the real-time temperature T of the gutta-percha injection channel is 实时 Maintain at the second preset temperature T2.

[0032] In some embodiments, the injection method further comprises the following steps:

[0033] Obtaining the starting position of the push block in the gutta-percha injection channel;

[0034] Get the real-time temperature T of the gutta-percha injection channel 实时 , and the real-time temperature T of the gutta-percha injection channel 实时 When the first preset temperature T1 is reached, the pushing block is moved from the starting position toward the gutta-percha output channel;

[0035] The gutta-percha output channel is continuously heated so that at least when the thrust output by the push block reaches the first thrust, the real-time temperature T of the gutta-percha injection channel is 实时 The second preset temperature T2 is reached.

[0036] In some embodiments, the injection method further comprises the following steps:

[0037] Obtaining the terminal position of the push block in the gutta-percha stick injection channel;

[0038] Before the push block reaches the end position, the gutta-percha output channel is continuously heated so that the real-time temperature T of the gutta-percha injection channel is 实时 Maintain at a second preset temperature T2;

[0039] When the pushing block reaches the end position, the heating of the gutta-percha output channel is terminated, and the pushing block returns to the starting position.

[0040] The present application also provides an injection filler for hot melt gutta-percha filling, comprising:

[0041] A housing forming a mounting cavity;

[0042] An injection housing is disposed in the mounting cavity, and the injection housing is formed with a gutta-percha injection channel for placing the gutta-percha stick; and the gutta-percha injection channel can be heated to melt the gutta-percha stick;

[0043] An injection needle, used for delivering gutta-percha; a gutta-percha delivery channel is provided in the injection needle, the gutta-percha delivery channel is connected with the gutta-percha stick injection channel, and the inner diameter of the gutta-percha delivery channel is smaller than the inner diameter of the gutta-percha stick injection channel;

[0044] A pushing block extends into the injection channel of the gutta-percha stick and is capable of moving along the injection channel of the gutta-percha stick toward the injection needle; and,

[0045] A controller is used to control the action of the pushing block, and the controller is configured to:

[0046] Obtain the first preset temperature T1 and the real-time temperature T of the gutta-percha injection channel实时 and a first driving force of the driving block;

[0047] The injection channel of the gutta-percha stick is heated, and the real-time temperature T of the injection channel of the gutta-percha stick is set to 实时 When the first preset temperature T1 is reached, the pushing block is moved toward the injection needle;

[0048] When the thrust output by the pushing block reaches the first thrust, the pushing block is stopped from moving.

[0049] In some embodiments, the controller is further configured to:

[0050] Obtaining a second driving force, wherein the second driving force is greater than the first driving force;

[0051] When the injection needle starts injection, the pushing block is driven to move toward the injection needle by a second pushing force, so that the injection needle outputs the gutta-percha.

[0052] In some embodiments, a magnetic body is provided on the pushing block, and the injection filler for hot melt gutta-percha filling further comprises:

[0053] At least two Hall sensors are connected to the controller for communication, and the two Hall sensors can match the magnetic body to output sensing signals; wherein,

[0054] A Hall sensor is disposed at one end of the gutta-percha stick injection channel away from the gutta-percha output channel and is capable of sensing the magnetic body to generate a starting position signal of the push block;

[0055] Another Hall sensor is arranged at one end of the entrance of the gutta-percha output channel and is capable of sensing the magnetic body to generate an end position signal of the push block.

[0056] Compared with the prior art, the injection system, injection method and injection filler for hot melt gutta-percha filling implemented by the present invention have the following beneficial effects:

[0057] The injection system, injection method and injection filler use temperature to control the action of the push block. When the real-time temperature T of the gutta-percha stick injection channel reaches the first preset temperature T1 in real time, the gutta-percha stick placed in the gutta-percha stick injection channel has begun to melt. At this time, the push block is moved toward the gutta-percha output channel. The push block can push the gutta-percha stick toward the gutta-percha output channel. Moreover, as the gutta-percha stick is heated and softened, the gutta-percha stick abuts against the entrance of the gutta-percha output channel and is squeezed and deformed by the push block, so that the heated and softened gutta-percha stick fills the space between the push block and the gutta-percha output channel. When the thrust output by the push block reaches the first thrust, the gutta-percha stick is densely arranged in the gutta-percha stick injection channel, so that the gutta-percha stick completes the alignment operation during the heating process. When the user needs to inject the gutta-percha, the gutta-percha can be immediately output through the gutta-percha output channel, reducing the user's waiting time.

[0058] Moreover, the injection system, injection method and injection filler can determine the starting position, alignment position and end position of the push block by monitoring the position of the push block, thereby avoiding the influence of the gutta-percha discharge due to the jamming of the push block. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 is a schematic diagram of the injection system in Example 1 of the present invention;

[0060] Figure 2 is a schematic diagram of another implementation of the injection system in Example 1 of the present invention;

[0061] Figure 3 is a connection diagram of the controller in Embodiment 1 of the present invention;

[0062] Figure 4 is a schematic flow chart of the injection method in Example 2 of the present invention;

[0063] Figure 5 is another schematic flow chart of the injection method in Example 2 of the present invention;

[0064] Figure 6 is another schematic flow chart of the injection method in Example 2 of the present invention;

[0065] Figure 7 is another schematic flow chart of the injection method in Example 2 of the present invention;

[0066] Figure 8 is a schematic diagram of an injection filler in Example 3 of the present invention;

[0067] Fig. 9 is a cross-sectional schematic diagram of the injection filler in Example 3 of the present invention;

[0068] Fig.10 It is a schematic diagram of the coordination between the magnetic body and the Hall sensor in Example 3 of the present invention.

[0069] In the figure, 100, injection system; 200, injection filler;

[0070] 1. Gutta-percha stick injection channel; 2. Gutta-percha output channel; 3. Heating unit; 4. Pushing block; 5. Controller; 6. Thrust information unit; 7. Temperature information unit; 8. Position information unit; 8a. First sensing element; 8b. Second sensing element; 8c. Third sensing element; 9. Housing; 10. Injection shell; 11. Injection needle; 12. Mounting cavity; 13. Magnetic body; 14. Hall sensor; 15. Gutta-percha stick; 16. Electric motor. DETAILED DESCRIPTION

[0071] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0072] In the description of the present invention, it should be understood that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0073] In the description of the present invention, it should be understood that the terms "height", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0074] In the description of the present invention, it should be understood that the terms "first" and "second" are used in the present invention for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0075] Example 1

[0076] refer to Figure 1-3 An embodiment of the present invention provides an injection system for hot-melt gutta-percha filling, which includes a gutta-percha stick injection channel, a gutta-percha output channel, a heating unit, a pushing block and a controller, wherein the gutta-percha stick injection channel is used to place the gutta-percha stick, the gutta-percha output channel is connected to the gutta-percha stick injection channel, and the inner diameter of the gutta-percha output channel is smaller than the inner diameter of the gutta-percha stick injection channel; the heating unit is connected to the gutta-percha output channel to heat the gutta-percha output channel, thereby melting the gutta-percha stick placed in the gutta-percha stick injection channel; the pushing block extends into the gutta-percha stick injection channel and can move along the gutta-percha stick injection channel toward the gutta-percha output channel, thereby pushing the gutta-percha melted into a liquid state out of the gutta-percha output channel, so that the injection system can achieve gutta-percha injection.

[0077] In this embodiment, the controller is used to control the movement of the push block, such as the controller controls the movement of the drive motor, and uses the output power of the drive motor to drive the push block to move. In addition, the controller is configured as follows:

[0078] Get the first preset temperature T1 and the real-time temperature T of the gutta-percha injection channel 实时 and the first impetus of the push block;

[0079] The real-time temperature T in the gutta-percha injection channel 实时 When the first preset temperature T1 is reached, the push block is moved toward the gutta-percha output channel;

[0080] When the thrust output by the pushing block reaches the first thrust, the pushing block stops moving.

[0081] It is understandable that both ends of the gutta-percha stick injection channel have openings, wherein one end of the gutta-percha stick injection channel is connected to the gutta-percha output channel, and the push block extends from the other end of the gutta-percha stick injection channel into the gutta-percha stick injection channel, so that the push block can move along the gutta-percha stick injection channel toward the gutta-percha output channel. Of course, the gutta-percha stick will be placed between the push block and the gutta-percha output channel, so that the push block can push the gutta-percha stick to move toward the gutta-percha output channel.

[0082] It should be noted that the first preset temperature T1 is at least the melting point of the gutta-percha stick, that is, the real-time temperature T 实时 When the first preset temperature T1 is reached, the gutta-percha stick begins to soften and melt, so as to ensure that when the push block pushes the gutta-percha stick toward the gutta-percha output channel, the gutta-percha stick can gradually fill the space between the push block and the gutta-percha output channel. After the gutta-percha stick melts in the gutta-percha stick injection channel, the gutta-percha is formed.

[0083] Real-time temperature T of the gutta-percha injection channel 实时The temperature sensor can be used to collect the temperature. The temperature sensor is connected to the controller, so that the temperature signal obtained in real time is transmitted to the controller, so that the controller can obtain the real-time temperature T of the gutta-percha injection channel. 实时 .

[0084] It should be noted that the volume of the gutta-percha stick injection channel is generally larger than the volume of the gutta-percha stick, which makes it easier for users to place the gutta-percha stick into the gutta-percha stick injection channel. The diameter of the gutta-percha stick is larger than the inner diameter of the gutta-percha output channel, which requires the gutta-percha stick to be hot-melted before it can flow out of the gutta-percha output channel.

[0085] Since the inner diameter of the gutta-percha output channel is smaller than the inner diameter of the gutta-percha stick injection channel, when the gutta-percha stick is pushed by the pushing block to fit the entrance of the gutta-percha output channel, the resistance of the gutta-percha entering the gutta-percha output channel is relatively large. As the pushing block moves further toward the gutta-percha output channel, the volume of the space between the pushing block and the entrance of the gutta-percha output channel will shrink. During this process, the gutta-percha stick injection channel will be continuously heated, the gutta-percha stick will be heated and melted, and the heated and softened gutta-percha stick will be squeezed and deformed by the pushing block. The deformed gutta-percha will gradually fill the space between the pushing block and the entrance of the gutta-percha output channel until the volume of the space between the pushing block and the entrance of the gutta-percha output channel is equal to the volume of the gutta-percha stick, and the gutta-percha will densely fill the space between the pushing block and the entrance of the gutta-percha output channel. At this time, if the pushing block outputs a larger thrust, the gutta-percha will be driven to flow out of the gutta-percha output channel, and the thrust output by the pushing block will be greater than the thrust used to push the gutta-percha stick during the hot-melt process of the gutta-percha stick. The thrust output by the pushing block at this time is defined as the first thrust of the pushing block. At this time, the pushing block empties the gap between the gutta-percha stick and the gutta-percha stick injection channel, and the gutta-percha is densely filled in the space between the pushing block and the entrance of the gutta-percha output channel.

[0086] It can be understood that the first driving force of the push block is related to the inner diameter of the gutta-percha output channel. Generally speaking, when the volume of the gutta-percha stick is smaller than the volume of the gutta-percha stick injection channel, the force of the push block to empty the gap between the gutta-percha stick and the gutta-percha stick injection channel will be smaller than the force of the push block to discharge the gutta-percha from the gutta-percha output channel. The first driving force of the push block can be configured according to the force of the push block to discharge the gutta-percha from the gutta-percha output channel, so that the first driving force is greater than the force of the push block to empty the gap between the gutta-percha stick and the gutta-percha stick injection channel, but less than the force of the push block to discharge the gutta-percha from the gutta-percha output channel.

[0087] In order to enable the injection system to control the movement of the push block according to the temperature of the gutta-percha injection channel and the thrust of the push block, as an example of the present embodiment, the injection system may include a thrust information unit and a temperature information unit, wherein the thrust information unit is used to obtain the thrust information of the push block, and the thrust information unit is communicatively connected with the controller to transmit the acquired thrust information to the controller; the temperature information unit is used to obtain the temperature information of the gutta-percha output channel, and the temperature information unit is communicatively connected with the controller to transmit the real-time temperature T of the gutta-percha injection channel to the controller. 实时 Transmitted to the controller.

[0088] The thrust information unit and the temperature information unit can use sensors to collect information and transmit the relevant information to the controller through the sensors. Generally speaking, the injection system will be equipped with an injection filler for users to operate by hand, and the sensor can be configured in the injection filler to facilitate direct and timely acquisition of relevant temperature and thrust information. The controller can be built into the injection filler or external to the injection filler. The thrust information unit and the temperature information unit only need to transmit the relevant temperature information and thrust information to the controller, and the controller can control the movement of the thrust block according to the acquired temperature information and thrust information.

[0089] In the case where the thrust output by the push block is used as the basis for judgment, if the push block is stuck in the output channel of the gutta-percha stick, the thrust output by the push block may reach the first thrust, but the gutta-percha stick has not yet filled the space between the push block and the entrance of the gutta-percha output channel. Figure 3 As an example of this embodiment, the injection system may further include a position information unit, wherein the position information unit is used to obtain the position of the push block in the gutta-percha injection channel. The position information unit includes at least a first sensing element and a second sensing element, wherein the first sensing element is disposed at one end of the gutta-percha injection channel away from the gutta-percha output channel and is capable of sensing the push block to generate a start position signal of the push block; the second sensing element is disposed at one end of the entrance of the gutta-percha output channel and is capable of sensing the push block to generate a terminal position signal of the push block.

[0090] The starting position of the push block refers to the position where the push block is located at one end away from the gutta-percha output channel and at the starting point of the moving stroke.

[0091] The terminal position of the pushing block refers to the position where the pushing block moves to the entrance of the gutta-percha output channel. At this time, the gutta-percha in the gutta-percha stick injection channel has been pressed out of the gutta-percha stick injection channel by the pushing block.

[0092] It is understandable that the injection system can record the amount of gutta-percha used for each injection, so the remaining amount of gutta-percha in the gutta-percha stick injection channel can be estimated. When the push block moves from the starting position to the gutta-percha output channel at a rated speed, the position at which the thrust output by the push block reaches the first thrust can be calculated. Therefore, when the starting position and the end position of the push block can be obtained, it can be determined whether the position of the push block is abnormal when the thrust output by the push block reaches the first thrust based on the time when the push block departs from the starting position.

[0093] Of course, in some examples, the injection system may also be provided with a third sensing element to sense the push block and generate an alignment position signal of the push block, wherein the alignment position of the push block refers to the position of the push block when the volume of the space between the push block and the entrance of the gutta-percha output channel is equal to the volume of the gutta-percha stick and the gutta-percha is densely filled in the space between the push block and the entrance of the gutta-percha output channel.

[0094] It should be noted that the positioning position of the push block will be different as the remaining volume of the gutta-percha stick in the gutta-percha stick injection channel is different. Generally speaking, the positioning position of the gutta-percha stick is more suitable for the user to use a new gutta-percha stick. At this time, the specifications of the gutta-percha stick are relatively uniform, and the positioning position of the push block in the gutta-percha stick injection channel of the same specification is also relatively fixed.

[0095] Example 2

[0096] This embodiment 2 provides an injection method for hot melt gutta-percha filling, referring to Figure 4 , specifically including steps S1-S4:

[0097] S1, obtaining a first preset temperature T1 of the gutta-percha output channel and a first driving force of the driving block;

[0098] S2, placing the gutta-percha stick into the gutta-percha output channel, and heating the gutta-percha output channel;

[0099] S3. Obtain the real-time temperature T of the gutta-percha injection channel 实时 , and the real-time temperature T of the gutta-percha injection channel 实时 When the first preset temperature T1 is reached, the push block is moved toward the gutta-percha output channel;

[0100] S4. Obtain the thrust output by the pushing block, and when the thrust output by the pushing block reaches the first thrust, stop the pushing block from moving.

[0101] It should be noted that the gutta-percha stick injection channel and the gutta-percha output channel are not necessarily arranged in the same system, and they can also be arranged in two independent injection systems respectively, for example, the gutta-percha output channel is arranged in the handheld device, and the gutta-percha stick injection channel is arranged in the fixed device, and the two are connected by pipeline. At this time, the push block moves towards the gutta-percha output channel, i.e., moves towards the outlet of the gutta-percha stick injection channel, and the gutta-percha stick is placed in the gutta-percha stick injection channel through the entrance of the gutta-percha stick injection channel. The moving action of the push block can be realized by the output power of the driving motor, and the power output by the driving motor is transmitted to the push block through a transmission structure, such as a gear structure, a turbine structure, etc., to drive the push block to move along the length direction of the gutta-percha stick injection channel.

[0102] When the injection method is executed, the user first places the gutta-percha stick in the gutta-percha stick injection channel. As the user clicks a button to start heating, the gutta-percha stick injection channel begins to be heated. It should be noted that the heating process of the gutta-percha stick injection channel is a necessary process for hot-melting the gutta-percha stick, and the gutta-percha stick needs to be hot-melted to a liquid state before it can flow out of the gutta-percha output channel.

[0103] Real-time temperature T in the gutta-percha injection channel 实时 When the first preset temperature T1 is reached, the pushing block automatically moves toward the gutta-percha output channel. The process of the pushing block pushing the gutta-percha stick to move is the same as that in Example 1, which will not be repeated here.

[0104] During the movement of the push block, the injection channel of the gutta-percha stick can be continuously heated, so that the gutta-percha stick is continuously melted and maintained in a liquid state. In this regard, the user can set a preset temperature value, namely, the second preset temperature T2, according to the specifications of the adopted gutta-percha stick or the temperature value recommended by the gutta-percha stick itself. Based on the second preset temperature T2, reference Figure 5 , the injection method may include the following steps:

[0105] S1, obtaining a first preset temperature T1 of the gutta-percha output channel and a first driving force of the driving block; and obtaining a second preset temperature T2, the second preset temperature T2 being greater than the first preset temperature T1, and the second preset temperature T2 and the first preset temperature T1 satisfy: 0.6T2≤T1≤0.8T2;

[0106] S2, placing the gutta-percha stick into the gutta-percha output channel, and heating the gutta-percha output channel;

[0107] S3. Obtain the real-time temperature T of the gutta-percha injection channel 实时 , and the real-time temperature T of the gutta-percha injection channel 实时 When the first preset temperature T1 is reached, the push block is moved toward the gutta-percha output channel;

[0108] S4, when the push block moves toward the gutta-percha output channel, the gutta-percha output channel is continuously heated, so that the real-time temperature T of the gutta-percha injection channel is 实时 Reaching a second preset temperature T2;

[0109] S5, obtaining the thrust output by the pushing block, and stopping the pushing block from moving when the thrust output by the pushing block reaches the first thrust;

[0110] S6, the gutta-percha output channel is continuously heated, and the real-time temperature of the gutta-percha stick injection channel is T 实时 Maintain at the second preset temperature T2.

[0111] It should be noted that the real-time temperature T 实时 The process of reaching the second preset temperature T2 is the heating process of the gutta-percha. 实时 After reaching the second preset temperature T2, the user can be prompted that the set temperature has been reached and the button can be clicked to start the gutta-percha injection. Therefore, the alignment process of the push block, that is, the process in which the push block pushes the gutta-percha stick to move so that the gutta-percha stick fills the space between the push block and the entrance of the gutta-percha output channel, only occurs during the heating process of the gutta-percha. When the gutta-percha finishes the heating process and enters the injection link or the heat preservation link, the gutta-percha should have filled the space between the push block and the entrance of the gutta-percha output channel.

[0112] In order to ensure that the injection method can complete the alignment process of the push block during the heating process of the gutta-percha, the injection method can detect the starting position of the movable block and control the temperature rise process of the gutta-percha stick injection channel according to the starting position of the movable block and the expected alignment position of the push block. Figure 6 , the injection method comprises the following steps:

[0113] S1, obtaining a first preset temperature T1 of the gutta-percha output channel and a first driving force of the driving block; and obtaining a second preset temperature T2, the second preset temperature T2 being greater than the first preset temperature T1, and the second preset temperature T2 and the first preset temperature T1 satisfy: T1=0.7T2;

[0114] S2, placing the gutta-percha stick into the gutta-percha output channel, and obtaining the starting position of the push block in the gutta-percha stick injection channel;

[0115] S3, heating the gutta-percha output channel;

[0116] S4. Obtain the real-time temperature T of the gutta-percha injection channel 实时 , and the real-time temperature T of the gutta-percha injection channel 实时 When the first preset temperature T1 is reached, the push block is moved from the starting position toward the gutta-percha output channel;

[0117] S5, when the push block moves toward the gutta-percha output channel, the gutta-percha output channel is continuously heated;

[0118] S6, obtaining the thrust output by the push block, and when the thrust output by the push block reaches the first thrust, making the real-time temperature T of the gutta-percha injection channel 实时 When the second preset temperature T2 is reached, the push block stops moving;

[0119] S7, the gutta-percha output channel is continuously heated, and the real-time temperature of the gutta-percha stick injection channel is T 实时 Maintain at the second preset temperature T2.

[0120] It should be noted that there is no specific order for step S1 and step S2.

[0121] Of course, since the volume of the gutta-percha stick used for each injection may not be equal, this will cause the position where the thrust output by the push block reaches the first thrust to be different. The injection method can be considered to be based on the maximum volume of the gutta-percha stick as the basis for judgment. At this time, the travel distance of the push block to the alignment position is the shortest. Therefore, it is only necessary to measure the real-time temperature T of the gutta-percha stick injection channel when the push block moves to the alignment position. 实时 If the second preset temperature T2 can be reached, then, in other injection situations, when the thrust output by the push block reaches the first thrust, the real-time temperature T of the gutta-percha injection channel 实时 The second preset temperature T2 will also be reached.

[0122] The injection method can also detect the end position of the push block, so that after the gutta-percha injection in the gutta-percha stick injection channel is completed, the push block is reset to the starting position to wait for the next injection, saving the user's operation time.

[0123] As an example of this embodiment, refer to Figure 7 , the injection method comprises the following steps:

[0124] S1, obtaining a first preset temperature T1 of the gutta-percha output channel and a first driving force of the driving block; and obtaining a second preset temperature T2, the second preset temperature T2 being greater than the first preset temperature T1, and the second preset temperature T2 and the first preset temperature T1 satisfy: T1=0.7T2;

[0125] S2, putting the gutta-percha stick into the gutta-percha output channel, obtaining the starting position of the push block in the gutta-percha stick injection channel and the end position of the push block in the gutta-percha stick injection channel;

[0126] S3, heating the gutta-percha output channel;

[0127] S4. Obtain the real-time temperature T of the gutta-percha injection channel 实时 , and the real-time temperature T of the gutta-percha injection channel 实时When the first preset temperature T1 is reached, the push block is moved from the starting position toward the gutta-percha output channel;

[0128] S5, when the push block moves toward the gutta-percha output channel, the gutta-percha output channel is continuously heated;

[0129] S6, obtaining the thrust output by the push block, and when the thrust output by the push block reaches the first thrust, making the real-time temperature T of the gutta-percha injection channel 实时 When the second preset temperature T2 is reached, the push block stops moving;

[0130] S7, the gutta-percha output channel is continuously heated, and the real-time temperature of the gutta-percha stick injection channel is T 实时 Maintain at a second preset temperature T2;

[0131] S8, performing an injection operation, using a second driving force to drive the driving block to continue to move toward the gutta-percha output channel, so that the driving block drives the gutta-percha to flow out of the gutta-percha output channel, wherein the second driving force is greater than the first driving force;

[0132] S9, before the push block reaches the end position, the gutta-percha output channel is continuously heated to make the real-time temperature T of the gutta-percha injection channel 实时 Maintain at a second preset temperature T2;

[0133] S10, when the pushing block reaches the end position, the heating of the gutta-percha output channel is stopped, and the pushing block returns to the starting position.

[0134] It should be noted that there is no specific order for step S1 and step S2.

[0135] The method for obtaining the starting position, end position and thrust value of the push block is the same as that of the injection system in Example 1, and will not be repeated here.

[0136] Example 3

[0137] This embodiment 3 provides an injection filler for hot melt gutta-percha filling, referring to Figure 8-10 , which includes a housing, an injection housing, an injection needle, a push block and a controller, wherein,

[0138] The shell forms an installation cavity; the injection shell is arranged in the installation cavity, and the injection shell forms a gutta-percha stick injection channel for placing the gutta-percha stick; and the gutta-percha stick injection channel can be heated to melt the gutta-percha stick; the injection needle is used to output the gutta-percha; a gutta-percha output channel is arranged in the injection needle, the gutta-percha output channel is connected with the gutta-percha stick injection channel, and the inner diameter of the gutta-percha output channel is smaller than the inner diameter of the gutta-percha stick injection channel; the pushing block extends into the gutta-percha stick injection channel, and can move along the gutta-percha stick injection channel toward the injection needle.

[0139] The controller controls the rotation of the motor and uses the power output by the motor to drive the push block to move, thereby controlling the movement of the push block, and the controller is configured as follows:

[0140] Obtaining a first preset temperature T1, a real-time temperature Treal-time of the gutta-percha injection channel, and a first driving force of the driving block;

[0141] The injection channel of the gutta-percha stick is heated, and when the real-time temperature T of the injection channel of the gutta-percha stick reaches the first preset temperature T1 in real time, the push block is moved toward the injection needle;

[0142] When the thrust output by the pushing block reaches the first thrust, the pushing block stops moving.

[0143] It should be noted that in the injection filler of the present embodiment 3, the controller is the control circuit board of the injection filler itself, which can be arranged in the installation cavity formed by the shell, or can be placed outside the shell through a wire. The controller of the present embodiment 3 executes the moving process of the push block, which is the same as the moving process of the push block of the embodiments 1 and 2, and will not be repeated here.

[0144] It is understandable that, since the inner diameter of the gutta-percha output channel is smaller than the inner diameter of the gutta-percha stick injection channel, the thrust of the push block squeezing the gutta-percha stick to deform the gutta-percha stick in the gutta-percha stick injection channel will be smaller than the thrust of the push block driving the gutta-percha to flow out of the gutta-percha output channel. Therefore, during the alignment process of the push block and the injection process of the push block, two different thrusts need to be configured for the push block. For example, as an example of this embodiment, the controller is further configured as:

[0145] Obtaining a second driving force, wherein the second driving force is greater than the first driving force;

[0146] When the injection needle starts the injection, the second driving force drives the pushing block to move toward the injection needle, so that the injection needle outputs the gutta-percha.

[0147] In order to obtain the position of the driving block in the injection channel of the gutta-percha stick, the injection filler may consider using a Hall sensor as a sensing element to detect the position of the driving block. Specifically, as an example of this embodiment, a magnetic body is provided on the push block, and the injection filler for hot melt gutta-percha filling also includes two Hall sensors, which are connected to the controller for communication, and the two Hall sensors can match the magnetic body to output a sensing signal; wherein,

[0148] A Hall sensor is arranged at one end of the gutta-percha stick injection channel away from the gutta-percha output channel, and can sense the magnetic body to generate a starting position signal of the push block; another Hall sensor is arranged at one end of the entrance of the gutta-percha output channel, and can sense the magnetic body to generate an end position signal of the push block.

[0149] When the driving block moves to the corresponding Hall sensor, the Hall sensor can be excited by the magnetic body to generate an induction signal. The controller obtains this induction signal to determine the current position of the driving block. Of course, in other examples, the injection filler for hot melt gutta-percha filling can be equipped with more Hall sensors. Multiple Hall sensors are arranged along the length direction of the gutta-percha stick injection channel and can sense the magnetic body to generate position signals of different positions of the push block.

[0150] In summary, the injection system, injection method, and injection filler provided by the embodiments of the present invention use temperature to control the action of the push block. When the real-time temperature T of the gutta-percha stick injection channel reaches the first preset temperature T1 in real time, the gutta-percha stick placed in the gutta-percha stick injection channel has begun to melt. At this time, the push block is moved toward the gutta-percha output channel. The push block can push the gutta-percha stick toward the gutta-percha output channel, and as the gutta-percha stick is heated and softened, the gutta-percha stick abuts against the entrance of the gutta-percha output channel and is squeezed and deformed by the push block, so that the heated and softened gutta-percha stick fills the space between the push block and the gutta-percha output channel. When the thrust output by the push block reaches the first thrust, the gutta-percha stick is densely arranged in the gutta-percha stick injection channel, so that the gutta-percha stick completes the alignment operation during the heating process. When the user needs to inject the gutta-percha, the gutta-percha can be immediately output through the gutta-percha output channel, reducing the user's waiting time.

[0151] Moreover, the injection system, injection method and injection filler can determine the starting position, alignment position and end position of the push block by monitoring the position of the push block, thereby avoiding the influence of the gutta-percha discharge due to the jamming of the push block.

[0152] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An injection system for hot melt gutta-percha filling, characterized in that: include: A gutta-percha injection channel to place a gutta-percha stick; A gutta-percha output channel is connected to the gutta-percha stick injection channel, and the inner diameter of the gutta-percha output channel is smaller than the inner diameter of the gutta-percha stick injection channel; a heating unit connected to the gutta-percha output channel to heat the gutta-percha output channel; A pushing block extends into the gutta-percha injection channel and is capable of moving along the gutta-percha injection channel toward the gutta-percha output channel; and A controller is used to control the action of the pushing block, and the controller is configured to: Obtain the first preset temperature T1 and the real-time temperature T of the gutta-percha injection channel 实时 and a first driving force of the driving block; The real-time temperature T of the gutta-percha injection channel 实时 When the first preset temperature T1 is reached, the pushing block is moved toward the gutta-percha output channel; When the thrust output by the pushing block reaches the first thrust, the pushing block is stopped from moving.

2. The injection system according to claim 1, characterized in that The injection system further comprises: A thrust information unit, used to obtain thrust information of the pushing block, and the thrust information unit is communicatively connected with the controller to transmit the acquired thrust information to the controller; A temperature information unit is used to obtain the temperature information of the gutta-percha output channel, and the temperature information unit is connected to the controller to communicate with the controller to obtain the real-time temperature T of the gutta-percha injection channel. 实时 transmitted to the controller.

3. The injection system according to claim 1, characterized in that The injection system further comprises: A position information unit, used to obtain the position of the push block in the gutta-percha injection channel, the position information unit at least comprising: A first sensing element is disposed at one end of the gutta-percha stick injection channel away from the gutta-percha output channel and is capable of sensing the push block to generate a start position signal of the push block; The second sensing element is disposed at one end of the entrance of the gutta-percha output channel and is capable of sensing the pushing block to generate an end position signal of the pushing block.

4. An injection method for hot melt gutta-percha filling, characterized in that: The steps include: Obtaining a first preset temperature T1 of the gutta-percha output channel and a first driving force of the driving block; Putting a gutta-percha stick into the gutta-percha output channel, and heating the gutta-percha output channel; Get the real-time temperature T of the gutta-percha injection channel 实时 , and the real-time temperature T of the gutta-percha injection channel 实时 When the first preset temperature T1 is reached, the pushing block is moved toward the gutta-percha output channel; The thrust output by the pushing block is obtained, and when the thrust output by the pushing block reaches a first thrust, the pushing block is stopped from moving.

5. The injection method according to claim 4, characterized in that: The injection method further comprises the following steps: Obtaining a second preset temperature T2, wherein the second preset temperature T2 is greater than the first preset temperature T1, and the second preset temperature T2 and the first preset temperature T1 satisfy: 0.6T2≤T1≤0.8T2; When the pushing block moves toward the gutta-percha output channel, the gutta-percha output channel is continuously heated, so that the real-time temperature T of the gutta-percha stick injection channel is 实时 Reaching a second preset temperature T2; The gutta-percha output channel is continuously heated, and the real-time temperature T of the gutta-percha injection channel is 实时 Maintain at the second preset temperature T2.

6. The injection method according to claim 4, characterized in that: The injection method further comprises the following steps: Obtaining the starting position of the push block in the gutta-percha injection channel; Get the real-time temperature T of the gutta-percha injection channel 实时 , and the real-time temperature T of the gutta-percha injection channel 实时 When the first preset temperature T1 is reached, the pushing block is moved from the starting position toward the gutta-percha output channel; The gutta-percha output channel is continuously heated so that at least when the thrust output by the push block reaches the first thrust, the real-time temperature T of the gutta-percha injection channel is 实时 The second preset temperature T2 is reached.

7. The injection method according to claim 6, characterized in that: The injection method further comprises the following steps: Obtaining the terminal position of the push block in the gutta-percha injection channel; Before the push block reaches the end position, the gutta-percha output channel is continuously heated so that the real-time temperature T of the gutta-percha injection channel is 实时 Maintain at a second preset temperature T2; When the pushing block reaches the end position, the heating of the gutta-percha output channel is terminated, and the pushing block returns to the starting position.

8. An injection filler for hot melt gutta-percha filling, characterized in that: A housing forming a mounting cavity; An injection housing is disposed in the mounting cavity, and the injection housing is formed with a gutta-percha injection channel for placing the gutta-percha stick; and the gutta-percha injection channel can be heated to melt the gutta-percha stick; An injection needle, used for delivering gutta-percha; a gutta-percha delivery channel is provided in the injection needle, the gutta-percha delivery channel is connected with the gutta-percha stick injection channel, and the inner diameter of the gutta-percha delivery channel is smaller than the inner diameter of the gutta-percha stick injection channel; A pushing block extends into the injection channel of the gutta-percha stick and is capable of moving along the injection channel of the gutta-percha stick toward the injection needle; and, A controller is used to control the action of the pushing block, and the controller is configured to: Obtain the first preset temperature T1 and the real-time temperature T of the gutta-percha injection channel 实时 and a first driving force of the driving block; The injection channel of the gutta-percha stick is heated, and the real-time temperature T of the injection channel of the gutta-percha stick is set to 实时 When the first preset temperature T1 is reached, the pushing block is moved toward the injection needle; When the thrust output by the pushing block reaches the first thrust, the pushing block is stopped from moving.

9. The injection plugger for hot melt gutta-percha filling according to claim 8, characterized in that: The controller is also configured to: Obtaining a second driving force, wherein the second driving force is greater than the first driving force; When the injection needle starts injection, the pushing block is driven to move toward the injection needle by a second pushing force, so that the injection needle outputs the gutta-percha.

10. The injection plugger for hot melt gutta-percha filling according to claim 8, characterized in that: The pushing block is provided with a magnetic body, and the injection filler for hot melt gutta-percha filling further comprises: At least two Hall sensors are connected to the controller for communication, and the two Hall sensors can match the magnetic body to output sensing signals; wherein, A Hall sensor is disposed at one end of the gutta-percha stick injection channel away from the gutta-percha output channel and is capable of sensing the magnetic body to generate a starting position signal of the push block; Another Hall sensor is arranged at one end of the entrance of the gutta-percha output channel and is capable of sensing the magnetic body to generate an end position signal of the push block.

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