CN109549736B - Pulp vitality detection instrument - Google Patents
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- CN109549736B CN109549736B CN201811252643.XA CN201811252643A CN109549736B CN 109549736 B CN109549736 B CN 109549736B CN 201811252643 A CN201811252643 A CN 201811252643A CN 109549736 B CN109549736 B CN 109549736B
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- 238000012360 testing method Methods 0.000 claims abstract description 150
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C19/00—Dental auxiliary appliances
- A61C19/04—Measuring instruments specially adapted for dentistry
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Biophysics (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
Abstract
The invention provides a pulp vitality detecting instrument, which comprises a refrigerating system, a constant-temperature bath system, a testing head and a temperature control system, wherein the refrigerating system is connected with the constant-temperature bath system through a pipeline; the constant-temperature bath system comprises a constant-temperature bath body, constant-temperature bath fluid and a pump; the refrigeration system evaporator is arranged in the constant-temperature bath body and transmits the cold energy of the refrigeration system to constant-temperature bath fluid in the constant-temperature bath system; the test head, the constant-temperature bath body and the pump pipeline are connected, and the constant-temperature bath fluid flows in the pipeline; the test head comprises a test head body, a test head constant-temperature bath fluid pipeline and a test head internal heater; the heater in the test head is a cylindrical sleeve with openings at two ends, and is sleeved outside the constant-temperature bath fluid pipeline of the test head; the pump provides power for the circulation flow of the constant-temperature bath fluid. The dual functions of cold measurement and hot measurement can be realized, and the detection temperature and the detection area can be accurately controlled.
Description
The technical field is as follows:
the invention relates to a dental hygiene device in dentistry, in particular to a measuring instrument specially suitable for dentistry.
Background art:
teeth are organs that are present in the oral cavity of amphibians, reptiles, birds and higher mammals and have the main function of tearing and grinding food. Teeth are the hardest, but frequently diseased organs of humans. The pulp is affected by the pathogenic stimulus, so that different pathological changes can occur, and corresponding clinical symptoms are generated, most commonly pulpitis and pulp necrosis, and the pulp must be treated and treated. The state of the pulp is detected prior to this treatment and therapy, a process known as pulp viability testing.
The teeth are subjected to external stimuli, such as temperature (cold and heat), chemical substances (sour and sweet), mechanical action (friction or hard biting) and the like to cause ache symptoms, and the ache symptoms are characterized by quick onset, sharp pain and short time. Currently, methods for pulp viability testing are: mechanical friction, galvanic and temperature methods. Among them, the current method and the temperature method are the most widely used detection methods at present.
The current method pulp vitality test is to stimulate pulp nerves by pulse current, record the reaction value of the pulp nerves to the current stimulation, and judge the vitality of the pulp. The method is powered by a dry battery, and has low power consumption and convenient operation. The current magnitude and the change speed can be accurately adjusted and quantitatively displayed. When the tested patient feels slightly sour, numb and painful, the displayed number is the electric stimulation threshold value of the tooth, so that the tooth with the living pith, partial necrosis and total necrosis can be judged. The current method for testing the pulp vitality can interfere with the electrocardio, induce the heart attack and has potential safety problem, so the method is forbidden to be used for patients with heart diseases. Moreover, the method can only be used for the affected tooth with relatively complete crown, but cannot be used for the affected tooth with full crown or large-area filling body.
The temperature method pulp vitality test utilizes the characteristic that the pulp is particularly sensitive to temperature change, and the pain of the pulp is aggravated when the pulp is heated and cooled. Therefore, in clinical medicine, the pulp vitality is often determined by the temperature change of cold and hot. The temperature method can be divided into a hot measurement method and a cold measurement method according to the temperature. The most common method of heat measurement is to apply a heat-softened gutta percha stick to the tooth being measured. The main components of the gutta-percha stick comprise gutta-percha, zinc oxide, wax or rosin, wherein the gutta-percha is a maleic latex, also known as gutta-percha, and is a natural latex solution cut from a tree growing in a tropical zone. It has thermoplasticity, can be softened at 60-65 deg.C, can be melted at about 100 deg.C, and can be cooled to form crystals with high density. The commonly used pulp viability cold test methods mainly include the mini-Ice bar method and the Endo-Froze/Endo-Ice method. Compared with the current method, the temperature test method is safer and can be used for patients with hearts. However, the detection temperature and the detection area cannot be precisely controlled, so that the reliability and accuracy of the actual test are questioned. Therefore, the pulp vitality detecting instrument capable of accurately controlling the testing area and the testing temperature is developed, and the actual requirements of oral clinical medicine are met.
Technical content
The invention provides a pulp vitality detecting instrument which can realize the double functions of cold measurement and hot measurement and can accurately control the detection temperature and the detection area.
The technical scheme adopted for solving the technical problems is as follows: a pulp vitality detecting instrument comprises a refrigerating system, a constant temperature bath system, a testing head and a temperature control system; the constant-temperature bath system comprises a constant-temperature bath body, constant-temperature bath fluid and a pump; the refrigeration system evaporator is arranged in the constant-temperature bath body and transmits the cold energy of the refrigeration system to constant-temperature bath fluid in the constant-temperature bath system; the test head, the constant-temperature bath body and the pump pipeline are connected, and the constant-temperature bath fluid flows in the pipeline; the test head comprises a test head body, a test head constant-temperature bath fluid pipeline and a test head internal heater; the heater in the test head is a cylindrical sleeve with openings at two ends, and is sleeved outside the constant-temperature bath fluid pipeline of the test head; the pump provides power for the circulation flow of the constant-temperature bath fluid.
The temperature control system can acquire temperature signals and control and regulate the temperature of the test head; the constant-temperature bath system comprises a heater, a heater and a control device, wherein the heater is arranged in the constant-temperature bath body and can heat constant-temperature bath fluid; the test head comprises a heat insulation layer and a thermometer insertion hole; the heat insulation layer is a cylindrical sleeve with openings at two ends and is sleeved outside the heater of the test head; the thermometer insertion hole is inside the test head, near the end of the test head that contacts the patient; the thermometer probe is arranged at the thermometer insertion hole, can accurately measure the temperature of the end part of the testing head contacted with the teeth of the patient, and leads out temperature signals through a signal wire to be transmitted and collected to a temperature control system; the test head is cylindrical or conical, and can accurately determine the contact area with the teeth. The test head body is made of a corrosion-resistant and easily-cleaned metal material.
The constant-temperature bath fluid pipeline of the test head comprises a first flow path pipeline, a second flow path pipeline and a third flow path pipeline, the constant-temperature bath fluid enters one end of the test head body through an external pipeline of the test head, firstly flows through the second flow path pipeline, and is shunted to enter the first flow path pipeline and the third flow path pipeline at a position close to the other end of the test head, and then flows out of the test head body from the first flow path pipeline and the third flow path pipeline, and the first flow path pipeline and the third flow path pipeline are merged into one pipeline and are connected with a constant-temperature bath inlet of the constant-temperature bath body. The test head constant temperature bath fluid pipeline is also provided with a shape, the test head constant temperature bath fluid pipeline is a U-shaped pipeline, the constant temperature bath fluid enters the inlet end of the U-shaped pipeline of the test head body through the external pipeline of the test head, flows in the U-shaped pipeline, turns back at the position close to the other end of the test head body, and the constant temperature bath fluid flows out at the outlet end of the U-shaped pipeline of the test head body.
A pipeline for connecting the throttling valve of the refrigerating system with the evaporator of the refrigerating system penetrates through the constant-temperature bath body and is hermetically connected with the constant-temperature bath body, and the refrigerant flows to the evaporator through the throttling valve in the pipeline; a pipeline for connecting an evaporator of the refrigerating system and a filter of the refrigerating system penetrates through the constant-temperature bath body and is hermetically connected with the constant-temperature bath body, and a refrigerant flows from the evaporator to the filter in the pipeline; the pipeline of the refrigerant flowing into the constant temperature bath body is positioned below the pipeline of the refrigerant flowing out of the constant temperature bath. The constant-temperature bath body is provided with a constant-temperature bath fluid inlet and a constant-temperature bath fluid outlet, and the constant-temperature bath fluid inlet is positioned above the constant-temperature bath fluid outlet; the pump is positioned at the constant-temperature bath fluid outlet, and the test head, the constant-temperature bath fluid inlet, the constant-temperature bath body, the constant-temperature bath fluid outlet and the pump are sequentially connected through pipelines to form a circulating closed system.
The constant-temperature bath body is made of a material with corrosion resistance and heat insulation performance; the constant-temperature bath fluid is ethylene glycol-water antifreeze or alcohol.
The refrigeration system comprises a filter, a compressor, a condenser, a throttle valve and an evaporator. The filter, the compressor, the condenser, the throttle valve and the evaporator are sequentially connected through pipelines to form a circulating closed system, so that a vapor compression type refrigeration cycle is formed, and a refrigerant is filled in the refrigeration system.
The constant-temperature bath body is provided with a constant-temperature bath fluid filling port and a constant-temperature bath fluid discharge port and is used for filling and discharging constant-temperature bath fluid, the constant-temperature bath fluid filling port is located at the top of the constant-temperature bath body, and the constant-temperature bath body discharge port is located at the bottom of the side face of the constant-temperature bath body.
The invention has the beneficial effects that:
the refrigerating system is driven to operate by electric energy and can provide cold energy for the pulp vitality detecting instrument. The test head is contacted with the surface of the tooth, and the pulp vitality is measured by changing the temperature of the test head. The temperature control system is provided with a temperature controller and a sensor and has the functions of acquiring temperature signals and controlling and adjusting the temperature of the test head. The constant temperature bath system has the function of keeping the temperature of the fluid in the constant temperature bath constant under the function of the temperature control system. The instrument can realize the dual functions of cold measurement and hot measurement, and can accurately control the detection temperature and the detection area.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural view of a pulp vitality testing instrument with dual functions of cold measurement and hot measurement
FIG. 2 is a schematic view of the internal structure of the test head of the first embodiment
FIG. 3 is a schematic view of the internal structure of a second embodiment of a test head
The reference symbols in the drawings are as follows: 1-a refrigeration system; 2-constant temperature bath system; 3-a test head; 4-a temperature control system; 11-a filter; 12-a compressor; 13-a condenser; 14-a throttle valve; 15-an evaporator; 21-constant temperature bath body; 22-constant temperature bath heater; 23-a pump; 51-refrigerant flowing into the constant temperature bath body pipeline; 52-refrigerant outflow thermostatic bath body pipeline; 53-constant temperature bath fluid line; 61-thermostatic bath fluid inlet; 62-constant temperature bath fluid outlet; 31-test head body; 32-test head internal heater; 33-insulating layer; 34-thermometer insert hole; 54-test head constant temperature bath fluid line; 541-a first flow path pipeline; 542-second flow path tubing; 543-third flow path pipeline; 63-U-shaped pipeline inlet end; and 64-U-shaped pipeline outlet end.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A pulp vitality detecting instrument comprises a refrigerating system 1, a constant temperature bath system 2, a testing head 3 and a temperature control system 4. The refrigerating system 1 is driven to operate by electric energy and can provide cold energy for the pulp vitality detecting instrument. The test head 3 is contacted with the surface of the tooth, and the pulp vitality is measured by changing the temperature of the test head. The temperature control system 4 is provided with a temperature controller and a sensor, and is used for collecting temperature signals and controlling and adjusting the temperature of the test head. The constant temperature bath system 2 has the function of keeping the temperature of the fluid in the constant temperature bath constant under the function of a temperature control system.
The refrigerating system 1 of the pulp vitality detecting instrument comprises a filter 11, a compressor 12, a condenser 13, a throttle valve 14 and an evaporator 15. The filter, the compressor, the condenser, the throttle valve and the evaporator are sequentially connected through pipelines to form a circulating closed system, so that a vapor compression type refrigerating cycle is formed, and a refrigerant is filled in the refrigerating system. The refrigerant used in the refrigeration cycle is one selected from propane (C3H8), pentafluoroethane (C2HF5), propylene (C3H6), and trifluoroethane (C2H3F 3).
The filter 11 is used for removing foreign matters in the refrigerant; the compressor 12 functions to compress and deliver refrigerant; the condenser 13 condenses the gaseous refrigerant into liquid state; the throttle valve 14 controls the amount of refrigerant input to the evaporator from the condenser; the evaporator 15 allows the refrigerant to absorb external heat.
When the compressor works in a refrigerating mode, low-temperature low-pressure refrigerant vapor in the compressor is compressed by the compressor, the pressure is increased, and the temperature is also increased; discharging high-pressure and high-temperature refrigerant vapor in the compressor into the condenser when the pressure of the refrigerant in the compressor is greater than the pressure in the condenser; the high-pressure and high-temperature refrigerant vapor in the condenser exchanges heat with air to be condensed into liquid refrigerant, the liquid refrigerant enters the evaporator after passing through the capillary tube, and the liquid refrigerant in the evaporator is vaporized after absorbing the heat of the constant-temperature bath fluid; the constant temperature bath fluid is thus cooled and the refrigerant vapor is drawn off by the compressor. Therefore, the refrigerant completes a cycle through four processes of compression, condensation, expansion and evaporation in the refrigeration system.
The constant temperature bath system 2 of the pulp vitality detecting instrument includes a constant temperature bath body 21, a constant temperature bath fluid, a constant temperature bath heater 22, and a pump 23. The constant temperature bath body 21 is made of a material having high corrosion resistance and heat insulation performance, for example, double-layer stainless steel having a vacuum heat insulation layer. The constant-temperature bath fluid adopts glycol-water antifreeze or alcohol, and flows in the constant-temperature bath body. The constant temperature bath heater 22 is arranged in the constant temperature bath body and can heat the constant temperature bath fluid to raise the temperature of the constant temperature bath fluid, so that the regulation and control of the cold and heat balance are realized. The pump 23 provides power for the circulation flow of the constant temperature bath fluid.
The evaporator 15 of the refrigerating system is arranged in the constant temperature bath body 21, and the cold energy of the refrigerating system is transmitted to the constant temperature bath fluid in the constant temperature bath system to control the constant temperature bath at a specific temperature.
And a pipeline for connecting a throttling valve of the refrigerating system and an evaporator of the refrigerating system penetrates through the constant-temperature bath body and is in sealed connection with the constant-temperature bath body, and the refrigerant flows to the evaporator through the throttling valve in the pipeline. And a pipeline for connecting the evaporator of the refrigerating system and the filter of the refrigerating system penetrates through the constant-temperature bath body and is hermetically connected with the constant-temperature bath body, and the refrigerant flows to the filter from the evaporator in the pipeline. The refrigerant inflow thermostatic bath body pipe line 51 is positioned below the refrigerant outflow thermostatic bath body pipe line 52.
The constant temperature bath body is provided with a constant temperature bath fluid filling port and a constant temperature bath fluid discharge port for filling and discharging of the constant temperature bath fluid, the constant temperature bath fluid filling port is positioned at the top of the constant temperature bath body, and the constant temperature bath body discharge port is positioned at the bottom of the side surface of the constant temperature bath body.
The evaporator can cool the constant-temperature bath fluid in the constant-temperature bath body; the constant-temperature bath heater can heat constant-temperature bath fluid in the constant-temperature bath body.
The test head 3, the constant temperature bath body 21 and the pump 23 of the pulp vitality detecting instrument are connected through a pipeline 53, and the constant temperature bath fluid flows in the pipeline 53. The constant-temperature bath body is provided with a constant-temperature bath fluid inlet 61 and a constant-temperature bath fluid outlet 62, and the constant-temperature bath fluid inlet 61 is positioned above the constant-temperature bath fluid outlet 62. The pump 23 is positioned at the constant temperature bath fluid outlet 62, and the test head 3, the constant temperature bath fluid inlet 61, the constant temperature bath body 21, the constant temperature bath fluid outlet 62 and the pump 23 are sequentially connected through pipelines to form a circulating closed system.
The constant-temperature bath fluid enters the test head through a pipeline by virtue of circulating power provided by the pump, and is subjected to heat or cold energy transfer with the test head to raise or lower the temperature of the test head; the constant temperature bath fluid then flows through the line into the constant temperature bath body. The constant temperature bath body is provided with an inlet and an outlet of constant temperature bath fluid and is hermetically connected with the pipeline. The constant temperature bath fluid inlet of the constant temperature bath body is positioned above the constant temperature bath outlet of the constant temperature bath body. The constant temperature bath fluid flows from top to bottom in the constant temperature bath body, and the refrigerant flows from bottom to top in the evaporator in the constant temperature bath body, so that the cold quantity exchange between the constant temperature bath fluid and the refrigerant is fully carried out.
The test head 3 of the pulp vitality detecting instrument comprises a test head body 31, a test head constant temperature bath fluid pipeline 54, a test head internal heater 32, a heat preservation insulating layer 33 and a thermometer inserting hole 34. The test head body 31 is controlled to a specific temperature in use and then contacts with the teeth of a patient to diagnose the health condition. The test head body 31 is made of corrosion-resistant and easily cleaned metal materials such as aluminum alloy or stainless steel. The test head is cylindrical or conical in shape, the size of the test head is strictly controlled, and the detection area in the tooth can be effectively measured for accurate control.
The test head constant temperature bath fluid pipeline 54 is a first flow path pipeline 541, a second flow path pipeline 542 and a third flow path pipeline 543, the constant temperature bath fluid enters one end of the test head body through the external pipeline of the test head, firstly flows through the second flow path pipeline, the constant temperature bath fluid is divided to enter the first flow path pipeline and the third flow path pipeline at the position close to the other end of the test head, and then the constant temperature bath fluid flows out of the test head body from the first flow path pipeline and the third flow path pipeline, and the first flow path pipeline and the third flow path pipeline are merged into one pipeline 53 and connected with a constant temperature bath inlet of the constant temperature bath body. The constant-temperature bath fluid flows in the constant-temperature bath fluid pipeline of the test head, and the cold energy of the fluid is transmitted to the test head body, so that the temperature of the test head is reduced and controlled.
The test head internal heater 32 is a cylindrical sleeve with openings at two ends, and is sleeved outside the test head constant-temperature bath fluid pipeline, and the heater provides heat in a heating mode to heat the test head body. The heat-insulating layer 33 is a cylindrical sleeve with openings at two ends, is sleeved outside the test head heater, and has the functions of heat insulation and insulation when the test head heater is started. The thermometer insertion hole 34 is formed inside the test head near the end of the test head that contacts the patient. The thermometer probe is placed at the thermometer insertion hole, and can accurately measure the temperature of the end of the test head which is in contact with the teeth of the patient. The thermometer is a thermocouple thermometer.
Temperature control system 4 of pulp vitality detecting instrument, including temperature controller and temperature sensor, temperature sensor can record the test head temperature to with temperature signal collection, carry for temperature control system. Specifically, the thermometer probe is arranged at the thermometer insertion hole, the temperature signal is led out through the signal wire and transmitted to the temperature control system, and the temperature control system controls the heater in the constant temperature bath system or the heater in the test head through the controller so as to reach the target temperature set by the temperature controller.
The refrigeration working process of the pulp vitality detecting instrument comprises the following steps: the refrigeration system and the constant temperature bath system are started, the temperature control system sets the target temperature of the test head, the refrigerant generates cold energy through the work of the refrigeration system, and the cold energy is transferred to constant temperature bath fluid when the refrigerant flows in the refrigeration system evaporator in the constant temperature bath body; the temperature of the constant-temperature bath fluid is reduced, the constant-temperature bath fluid flows into the test head in the pipeline through the power of the pump, and the constant-temperature bath fluid exchanges heat with the test head body; the thermometer probe measures the temperature of the test head at a thermometer inserting hole in the test head, and temperature signals are led out through a signal wire and transmitted and collected to a temperature control system; if the temperature of the test head is different from the target temperature, the temperature control system controls the heating capacity of the constant-temperature bath heater so as to adjust the temperature of the constant-temperature bath fluid, further adjust the temperature of the test head, realize the accurate control of the temperature of the test head, and finally enable the actual temperature to be equal to the target temperature and maintain the temperature stability.
Heating working process of the pulp vitality detecting instrument: the refrigeration system and the constant temperature bath system are closed, the target temperature of the test head is set, the heater of the test head works, the temperature of the test head is raised through heat exchange, the temperature of the test head is measured by the thermometer probe at a thermometer insertion hole in the test head, and a temperature signal is led out through a signal wire and transmitted to the temperature control system; if the temperature of the test head is different from the target temperature, the temperature control system controls the heating amount of the heater of the test head, so that the temperature of the test head is adjusted, the accurate control of the temperature of the test head is realized, and finally the actual temperature is equal to the target temperature and the temperature stability is maintained.
Example 2
The test head constant temperature bath fluid pipeline 54 is a U-shaped pipeline, the constant temperature bath fluid enters the inlet end 63 of the test head body U-shaped pipeline through the external pipeline of the test head, flows in the U-shaped pipeline and turns back at the position close to the other end of the test head, and the constant temperature bath fluid flows out at the outlet end 64 of the test head body U-shaped pipeline. When the fluid flows in the constant-temperature bath fluid pipeline of the test head, the heat or the cold of the fluid is exchanged with the test head body, so that the temperature of the test head is increased or reduced. The thermometer is a thermocouple thermometer.
The test head internal heater 32 is a cylindrical sleeve with openings at two ends, and is sleeved outside the test head constant-temperature bath fluid pipeline, and the heater provides heat in a heating mode to heat the test head body. The heat-insulating layer 33 is a cylindrical sleeve with openings at two ends, is sleeved outside the test head heater, and has the functions of heat insulation and insulation when the test head heater is started. The thermometer insertion hole 34 is formed inside the test head near the end of the test head that contacts the patient. The thermometer probe is placed at the thermometer insertion hole, and can accurately measure the temperature of the end of the test head which is in contact with the teeth of the patient.
The above examples of the present invention are merely examples for clearly illustrating the present invention and do not limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. A pulp vitality detecting instrument comprises a refrigerating system, a constant temperature bath system, a testing head and a temperature control system; the method is characterized in that: the constant-temperature bath system comprises a constant-temperature bath body, constant-temperature bath fluid and a pump; the evaporator of the refrigerating system is arranged in the constant temperature bath body, and the evaporator transmits the cold energy of the refrigerating system to constant temperature bath fluid in the constant temperature bath system; the test head, the constant-temperature bath body and the pump pipeline are connected, and the constant-temperature bath fluid flows in the pipeline; the test head comprises a test head body, a test head constant-temperature bath fluid pipeline and a test head internal heater; the heater in the test head is a cylindrical sleeve with openings at two ends, and is sleeved outside the constant-temperature bath fluid pipeline of the test head; the pump provides power for the circulation flow of the constant-temperature bath fluid;
the temperature control system can collect temperature signals and control and regulate the temperature of the test head, and the constant-temperature bath system comprises a heater which is arranged in the constant-temperature bath body and can heat constant-temperature bath fluid; the test head comprises a heat insulation layer and a thermometer insertion hole; the heat insulation layer is a cylindrical sleeve with openings at two ends and is sleeved outside the heater of the test head; the thermometer insertion hole is arranged inside the test head, and is close to the end part of the test head which is contacted with a patient; the thermometer probe is arranged at the thermometer insertion hole, can measure the temperature of the end part of the test head contacted with the teeth of the patient, and leads out temperature signals through a signal wire to be transmitted and collected to a temperature control system; the test head is cylindrical or conical, and the test head can contact with a tooth contact area;
the test head constant-temperature bath fluid pipeline comprises a first flow path pipeline, a second flow path pipeline and a third flow path pipeline, constant-temperature bath fluid enters one end of the test head body through an external pipeline of the test head, the constant-temperature bath fluid firstly flows through the second flow path pipeline and is close to the other end of the test head, the constant-temperature bath fluid is shunted and enters the first flow path pipeline and the third flow path pipeline, then the constant-temperature bath fluid flows out of the test head body through the first flow path pipeline and the third flow path pipeline, and the first flow path pipeline and the third flow path pipeline are merged into one pipeline and connected with a constant-temperature bath inlet of the constant-temperature bath body.
2. The pulp vitality inspection instrument according to claim 1, wherein: the test head constant temperature bath fluid pipeline is a U-shaped pipeline, the constant temperature bath fluid enters the inlet end of the U-shaped pipeline of the test head body through the external pipeline of the test head, flows in the U-shaped pipeline and turns back at the position close to the other end of the test head, and the constant temperature bath fluid flows out of the outlet end of the U-shaped pipeline of the test head body.
3. The pulp vitality inspection instrument according to claim 1, wherein: the test head body is made of a corrosion-resistant and easily-cleaned metal material.
4. The pulp vitality inspection instrument according to claim 1, wherein: a pipeline for connecting a throttling valve of the refrigerating system and an evaporator of the refrigerating system penetrates through the constant-temperature bath body and is hermetically connected with the constant-temperature bath body, and a refrigerant flows to the evaporator through the throttling valve in the pipeline; a pipeline for connecting an evaporator of the refrigerating system and a filter of the refrigerating system penetrates through the constant-temperature bath body and is hermetically connected with the constant-temperature bath body, and a refrigerant flows from the evaporator to the filter in the pipeline; the pipeline of the refrigerant flowing into the constant temperature bath body is positioned below the pipeline of the refrigerant flowing out of the constant temperature bath.
5. The pulp vitality inspection instrument according to claim 1, wherein: the constant-temperature bath body is provided with a constant-temperature bath fluid inlet and a constant-temperature bath fluid outlet, and the constant-temperature bath fluid inlet is positioned above the constant-temperature bath fluid outlet; the pump is positioned at the constant-temperature bath fluid outlet, and the test head, the constant-temperature bath fluid inlet, the constant-temperature bath body, the constant-temperature bath fluid outlet and the pump are sequentially connected through pipelines to form a circulating closed system.
6. The pulp vitality inspection instrument according to claim 1, wherein: the constant-temperature bath body is made of a material with corrosion resistance and heat insulation performance; the constant-temperature bath fluid is ethylene glycol-water antifreeze or alcohol.
7. The pulp vitality inspection instrument according to claim 1, wherein: the refrigeration system comprises a filter, a compressor, a condenser, a throttle valve and an evaporator, wherein the filter, the compressor, the condenser, the throttle valve and the evaporator are sequentially connected through pipelines to form a circulation closed system to form a vapor compression refrigeration cycle, and a refrigerant is filled in the refrigeration system.
8. The pulp vitality inspection instrument according to claim 1, wherein: the constant temperature bath body is provided with a constant temperature bath fluid filling port and a constant temperature bath fluid discharge port for filling and discharging of the constant temperature bath fluid, the constant temperature bath fluid filling port is positioned at the top of the constant temperature bath body, and the constant temperature bath body discharge port is positioned at the bottom of the side surface of the constant temperature bath body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811252643.XA CN109549736B (en) | 2018-10-25 | 2018-10-25 | Pulp vitality detection instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811252643.XA CN109549736B (en) | 2018-10-25 | 2018-10-25 | Pulp vitality detection instrument |
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| CN109549736A CN109549736A (en) | 2019-04-02 |
| CN109549736B true CN109549736B (en) | 2021-08-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113288494B (en) * | 2021-06-16 | 2022-07-12 | 孙永红 | Dental diagnosis device with synchronous cold and hot probe and control method |
| TWI776734B (en) * | 2021-11-12 | 2022-09-01 | 霽邦有限公司 | Dental pulp activity detection device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106983572A (en) * | 2017-04-11 | 2017-07-28 | 长沙市中南口腔医疗器械有限公司 | A kind of dental composite diagnosis and therapy apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2305367A (en) * | 1941-11-15 | 1942-12-15 | Webb George Farrell | Tooth vitality tester |
| US4308012A (en) * | 1980-01-21 | 1981-12-29 | Richard Tamler | Dental pulp vitality tester |
| CN201798819U (en) * | 2010-09-01 | 2011-04-20 | 张武 | Multifunctional oral cavity diagnosis and treatment instrument |
| CN103565417B (en) * | 2013-07-25 | 2015-02-18 | 南京医科大学第一附属医院 | Pain test instrument |
| CN206184476U (en) * | 2016-10-31 | 2017-05-24 | 郑州长城科工贸有限公司 | Thermostatic bath |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106983572A (en) * | 2017-04-11 | 2017-07-28 | 长沙市中南口腔医疗器械有限公司 | A kind of dental composite diagnosis and therapy apparatus |
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