CN104173113A - Pulp vitality temperature detector - Google Patents
Pulp vitality temperature detector Download PDFInfo
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- CN104173113A CN104173113A CN201410477469.4A CN201410477469A CN104173113A CN 104173113 A CN104173113 A CN 104173113A CN 201410477469 A CN201410477469 A CN 201410477469A CN 104173113 A CN104173113 A CN 104173113A
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Abstract
The invention discloses a pulp vitality temperature detector structure. The structure comprises an insulating and heat-insulating shell (1) and is characterized in that an extensional insulating temperature-conducting cold end (2a) and an insulating temperature-conducting hot end (2b) are arranged at two ends of the insulating and heat-insulating shell (1) and can be contacted with the dental face; a cold end temperature control system and a hot end temperature control system are arranged inside the insulating and heat-insulating shell (1); when a general switch (3) is pushed to the gear of'refrigeration', the temperature at the cold end can be quickly reduced to 10 DEG C or below and stably kept for cold diagnosis; and when the general switch (3) is pushed to the gear of'heating', the temperature at the hot end can quickly rise to 60 DEG C or above and is kept stable for hot diagnosis. According to the pulp vitality temperature detector, the temperatures at the cold end and the hot end are stable and visible, so that examination results can be relatively scientific and repeatable and have high credibility and accuracy; furthermore, the pulp vitality temperature detector is convenient to use, safe and reliable.
Description
Technical field
The present invention relates to a kind of pulp vitality temperature set tester, belong to department of stomatology medical aid tool technical field.
Background technology
Dental pulp is the soft tissue that is positioned at pulp cavity, and its outsourcing, around sclerous tissueses such as dentin, enamels, has important physiological function.When there is environmental stimuli, as antibacterial infection, physics and chemistry stimulation or immunoreation etc., can cause dental pulp disease, wherein antibacterial infection is Etiological.Dental pulp disease can be divided into polytype clinically, the clinical manifestation of every type and treatment prognosis are all different, and location is suffered from tooth and judged that suffering from sound of baby talk marrow state has great importance exactly.For diagnosis dental pulp disease, pulp vitality test is a very important step, wherein pulp vitality electrical measurement is only tested and can be suffered from having or not of tooth pulp vitality for reacting, can not indicate different pathological states, and the test of pulp vitality temperature not only can be pointed out the position of suffering from tooth, also can reflect the state of suffering from sound of baby talk marrow, so the diagnosis of pulpitis more depends on the result of pulp vitality temperature test.
The test of pulp vitality temperature is the reaction of cold or thermostimulation to be checked to a kind of diagnostic method of dental pulp state according to suffering from tooth, and its ultimate principle is that unexpected, obvious variations in temperature can be brought out dental pulp reaction or pain to a certain degree.Normal dental pulp has certain threshold of tolerance to hot and cold stimulation, generally take lower than 10 ℃ be cold stimulation, higher than 60 ℃, for thermostimulation, when dental pulp has pathological changes, its temperature threshold of tolerance changes, and to hot and cold stimulation, can cash as responsive or blunt, even reactionless.Temperature test is divided into the cold diagnostic method and the hot diagnostic method, and the cold diagnostic method can select cold water, little ice lolly, carbon dioxide, ethyl chloride as cold stimulation source, and the hot diagnostic method can select the metallic weapon of hot water, hot gutta-percha or heating as thermostimulation source.But above method has obvious weak point: 1. the temperature of hot and cold stimulus is wayward, if cold stimulation source temperature higher than 10 ℃, or thermostimulation source temperature is lower than 60 ℃, check result is incredible, may cause mistaken diagnosis, fail to pinpoint a disease in diagnosis; 2. take cold water, hot water during as stimulus, because water flow is excessive, tending to stimulates to being examined suspicious periodontal tooth, if examined the tooth on tooth side just for suffering from tooth, during inspection, patient shows the reaction of pulpitis, and clinician can take for and be examined tooth for suffering from tooth, causes mistaken diagnosis; 3. for provide hot and cold stimulus need to be equipped with the facilities such as refrigerator, alcohol burner simultaneously, cost is higher, and the alcohol burner of burning has potential safety hazard.
Summary of the invention
For overcoming the deficiencies in the prior art, the invention provides a kind of stable performance, registration, pulp vitality temperature set tester esy to use, safe and reliable.
The present invention solves the problems of the technologies described above adopted technical scheme: pulp vitality temperature set tester of the present invention (referring to Fig. 1,2), have insulation and thermal insulation shell (1), the two ends that it is characterized in that insulation and thermal insulation shell (1) are connected with that warm cold junction (2a) is led in the extensionality insulation that can contact with facing and warm end (2b) is led in insulation, the inside of insulation and thermal insulation shell (1) is provided with by main switch (3), thermindicator (4a), negative tempperature coefficient thermistor (5a), N-type semiconductor (6a), P-type semiconductor (6b), DC source (10), the cold junction temperature control system that wire (11) forms and by main switch (3), thermindicator (4b), semistor (5b), P-type semiconductor (6b), N-type semiconductor (6a), DC source (10), the hot-side temperature control system that wire (11) forms, wherein, the opposite ends of N-type, P-type semiconductor (6a, 6b) is led warm cold junction (2a) and extensionality with extensionality insulation respectively and is insulated and lead warm end (2b) and contact.
In technique scheme of the present invention, switch temperature≤10 ℃ of negative tempperature coefficient thermistor (5a), the switch temperature of semistor (5b) is preferably made as >=and 60 ℃.Warm cold junction (2a) is led in extensionality insulation of the present invention and the ceramic material formation that warm end (2b) preferably adopts insulating heat-conductive is led in insulation.Main switch of the present invention (3) is comprised of blade, contact and insulating guide rod, and wherein insulating guide rod drives blade moving under external force, realizes the clutch with contact.
Principle of the present invention is as follows.
One, quasiconductor of the present invention is divided into N-type semiconductor (6a) and P-type semiconductor (6b), its cooling and warming principle is: when the thermocouple centering being coupled to when a N-type semiconductor material and P-type semiconductor material has electric current to pass through, between two ends, will produce transfer of heat, the joint that electric current flows to P type element by N-type element absorbs heat, become cold junction, by P type element, flowed to the joint release heat of N-type element, become hot junction.The size of heat absorption and release is that the element logarithm by the size of electric current and semi-conducting material N, P-type semiconductor decides.The two ends of quasiconductor (6a, 6b) respectively with insulation but guide temp can good pottery contact, temperature transfer can be insulated lead on warm cold junction, hot junction to extensionality (illustrates: the cold junction in Fig. 1, hot junction all adopt elbow structure).By selecting the power supply of suitable voltage and the N of suitable quantity, P-type semiconductor element pair, can realize cold junction temperature≤10 ℃, hot-side temperature >=60 ℃.
Its two, critesistor of the present invention is divided into negative temperature coefficient thermistor 5a and positive temperature coefficient thermistor 5b.The typical feature of thermal resistor is to responsive to temperature, shows different resistance values at different temperature, and when temperature surpasses or during lower than switch temperature, resistance moment can increase severely.Positive temperature coefficient thermistor resistance value when temperature is higher is larger, and negative temperature coefficient thermistor resistance value when temperature is lower is higher.By selecting the critesistor of suitable switch temperature, can be by cold, the temperature in hot junction is controlled near a stable numerical value, principle is: when cold junction potsherd temperature is more and more lower, the resistance of critesistor (5a) is increasing, when cold junction potsherd temperature is during lower than critesistor (5a) switch temperature (switch temperature≤10 ℃), critesistor 5a resistance value sharply increases, in circuit, almost no current passes through, N, P-type semiconductor element stops heat transmission, and when cold junction potsherd temperature is during higher than switch temperature, critesistor (5a) resistance sharply diminishes, in circuit, electric current increases, N, P-type semiconductor element restarts heat transmission, thereby cold junction temperature is controlled near critesistor (5a) switch temperature, in like manner, when hot junction potsherd temperature is more and more higher, critesistor 5b resistance is increasing, when hot junction potsherd temperature is during higher than critesistor (5b) switch temperature (switch temperature >=60 ℃), critesistor (5b) resistance value sharply increases, in circuit, almost no current passes through, N, P-type semiconductor element stops heat transmission, and when hot junction potsherd temperature is during lower than switch temperature, critesistor (5b) resistance sharply diminishes, in circuit, electric current increases, N, P-type semiconductor element restarts heat transmission, thereby hot-side temperature is controlled near critesistor (5b) switch temperature.
They are three years old, thermindicator (4) is divided into 4a, 4b, by ammeter, converted, be respectively used to indicate cold junction, the temperature in hot junction, its principle is: the resistance value of critesistor varies with temperature and changes, each critesistor has a resistance and form corresponding to temperature, the resistance value (other element resistance value except critesistor is more stable) that can then deduct other parts divided by circuital current counting circuit total resistance value by supply voltage obtains thermosensitive resistance, then table look-up and obtain temperature value, otherwise, by tabling look-up, obtain the resistance of critesistor under different temperatures, then calculate the current value in circuit at this temperature, just the reading of temperature value and ammeter can be mapped, the scale value of ammeter is changed into temperature value, can repack ammeter into thermindicator.By selecting the ammeter of suitable range, then repack thermindicator into, can be used for pointing out doctor's temperature when to reach the hot and cold inspection requirements of examining.
They are four years old, main switch (3) is by blade (7), contact (8) and insulating guide rod (9) form, wherein blade (7) is divided into 7a, 7b, 7a and 7b are connected to and are integrated by insulating guide rod (9), contact (8) is divided into 8a, 8b, 8c, 8d, 8e, 8f, by mobile insulating guide rod (9) band cutting blade (7), contact from different contacts (8), can connect different circuit, concrete operations are: main switch (3) is pushed into " refrigeration " shelves, be that blade 7a contacts with contact 8a, blade 7b contacts with contact 8d, circuit is connected, electric current passes through N, P element, cold junction refrigeration, now in circuit, negative temperature coefficient thermistor 5a plays refrigeration end temperature control action, thermindicator 4a is used for pointing out doctor's temperature when to reach cold essentials for diagnosis asking, and positive temperature coefficient thermistor 5b and thermindicator 4b be not in circuit at this moment, the two is not all worked, main switch (3) is pushed into " closing " shelves, and blade 7a contacts with contact 8b, blade 7b contacts with contact 8e, circuitry cuts, main switch (3) is pushed into " heating " shelves, be that blade 7a contacts with contact 8c, blade 7b contacts with contact 8f, circuit is connected, electric current is by N, P element, hot junction heats, and now in circuit, positive temperature coefficient thermistor 5b plays hot-side temperature control action processed, and thermindicator 4b is used for pointing out doctor's temperature when to reach hot essentials for diagnosis asking, and negative temperature coefficient thermistor 5a and thermindicator 4a be in circuit at this moment, the two is not all worked.
Visible, the present invention has fully utilized semiconductor refrigerating technology, temperature control technology, temperature Display Technique.
The present invention has the following advantages: 1. cold junction, hot-side temperature are stable, visual, make check result more scientific, can repeat, with a high credibility; 2. cold junction, hot junction only stimulate and are examined tooth, can not involve adjacent teeth, and degree of accuracy is high; 3. need auxiliary facility to compare with the hot and cold diagnostic method of tradition, the present invention is esy to use, safe and reliable.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, further illustrate structure of the present invention:
Fig. 1 is the surface structure schematic diagram of pulp vitality temperature set tester of the present invention;
Fig. 2 is the internal circuit configuration schematic diagram of Fig. 1.
The specific embodiment
By the following examples the present invention is further described specifically.Be necessary to point out, below the just explanation to structure of the present invention of embodiment, can not be interpreted as limiting the scope of the invention.
embodiment 1:, the present invention examines test for pulp vitality is cold
To be that pulp vitality is cold examine test to the present embodiment.When doctor determines after suspicious tooth by understanding patient main suit, history of present illness, history of past illness, need to carry out cold the examining of pulp vitality to all suspicious teeth and test with location trouble tooth.To patient, hand over after the symptom that may occur in checking process, every wet, dry up facing, the main switch 3 of pulp vitality temperature set tester of the present invention is pushed into refrigeration shelf, now blade 7a contacts with contact 8a, blade 7b contacts with contact 8d, circuit is connected, electric current passes through N, P element, cold junction temperature reduces rapidly, when cold junction temperature is down to negative temperature coefficient thermistor 5a switch temperature, in circuit, only have faint electric current to pass through, it is stable that cold junction temperature keeps, thermindicator 4a can point out doctor now cold junction temperature reached cold essentials for diagnosis and asked, doctor can lead extensionality insulation warm cold junction (2a) and be placed in and examined dental surface, check that suspicious tooth is to cold reaction of examining.After inspection, main switch 3 is pushed into and closes shelves, now circuit disconnects, and cold junction temperature is replied room temperature gradually.
embodiment 2: the present invention examines test for pulp vitality heat
The present embodiment is that pulp vitality heat is examined test.When doctor determines after suspicious tooth by understanding patient main suit, history of present illness, history of past illness, need to carry out pulp vitality heat to all suspicious teeth and examine test with location trouble tooth.To patient, hand over after the symptom that may occur in checking process, every wet, dry up facing, the main switch 3 of pulp vitality temperature set tester of the present invention is pushed into and heats shelves, now blade 7a contacts with contact 8c, blade 7b contacts with contact 8f, circuit is connected, electric current passes through N, P element, hot-side temperature raises rapidly, when hot-side temperature rises to positive temperature coefficient thermistor 5b switch temperature, in circuit, only have faint electric current to pass through, it is stable that hot-side temperature keeps, thermindicator 4b can point out doctor now hot-side temperature reached hot essentials for diagnosis and asked, doctor can lead extensionality insulation warm end 2b and be placed in and examined dental surface, check the reaction that suspicious tooth is examined heat.After inspection, main switch 3 is pushed into and closes shelves, now circuit disconnects, and hot-side temperature is replied room temperature gradually.
When carrying out cold examining with heat to suspicious tooth simultaneously, needs examine while checking, and only need be by above-described embodiment 1,2 blocked operations.
Claims (4)
1. a pulp vitality temperature set tester, has insulation and thermal insulation shell (1), and the two ends that it is characterized in that insulation and thermal insulation shell (1) are connected with that warm cold junction (2a) is led in the extensionality insulation that can contact with facing and warm end (2b) is led in insulation, the inside of insulation and thermal insulation shell (1) is provided with by main switch (3), thermindicator (4a), negative tempperature coefficient thermistor (5a), N-type semiconductor (6a), P-type semiconductor (6b), DC source (10), the cold junction temperature control system that wire (11) forms and by main switch (3), thermindicator (4b), semistor (5b), P-type semiconductor (6b), N-type semiconductor (6a), DC source (10), the hot-side temperature control system that wire (11) forms, wherein, the opposite ends of N-type, P-type semiconductor (6a, 6b) is led warm cold junction (2a) and extensionality with extensionality insulation respectively and is insulated and lead warm end (2b) and contact.
2. pulp vitality temperature set tester according to claim 1, is characterized in that switch temperature≤10 ℃ of negative tempperature coefficient thermistor (5a), switch temperature >=60 ℃ of semistor (5b).
3. pulp vitality temperature set tester according to claim 1, is characterized in that warm cold junction (2a) is led in extensionality insulation and the ceramic material formation that warm end (2b) adopts insulating heat-conductive is led in insulation.
4. according to the pulp vitality temperature set tester described in claim 1,2 or 3, it is characterized in that main switch (3) is comprised of blade, contact and insulating guide rod, wherein insulating guide rod drives blade moving under external force, realizes the clutch with contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410477469.4A CN104173113A (en) | 2014-09-18 | 2014-09-18 | Pulp vitality temperature detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410477469.4A CN104173113A (en) | 2014-09-18 | 2014-09-18 | Pulp vitality temperature detector |
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| Publication Number | Publication Date |
|---|---|
| CN104173113A true CN104173113A (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410477469.4A Pending CN104173113A (en) | 2014-09-18 | 2014-09-18 | Pulp vitality temperature detector |
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| CN (1) | CN104173113A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974968A (en) * | 2016-07-06 | 2016-09-28 | 简小冲 | Hot and cold pen device for oral diagnosis and treatment and uses thereof |
| CN109549737A (en) * | 2018-10-25 | 2019-04-02 | 中国科学院理化技术研究所 | A kind of portable pulp vitality detecting instrument |
| CN113288494A (en) * | 2021-06-16 | 2021-08-24 | 孙永红 | Dental diagnosis device with synchronous cold and hot probes and control method |
| TWI776734B (en) * | 2021-11-12 | 2022-09-01 | 霽邦有限公司 | Dental pulp activity detection device |
Citations (6)
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| US6491522B1 (en) * | 2000-08-09 | 2002-12-10 | Charles D. Jensen | Dental diagnostic system and method |
| US20060027553A1 (en) * | 2004-08-09 | 2006-02-09 | Hanisko Francis D | Heater for endodontic condenser |
| CN101563045A (en) * | 2006-10-18 | 2009-10-21 | 白李生物科技有限公司 | Endodontic instrument for root canal filling and heating tip adapted to the same |
| CN201500196U (en) * | 2009-08-01 | 2010-06-09 | 赵呈利 | Multifunctional oral diagnosis and treatment instrument |
| CN201798819U (en) * | 2010-09-01 | 2011-04-20 | 张武 | Multifunctional oral cavity diagnosis and treatment instrument |
| CN204106243U (en) * | 2014-09-18 | 2015-01-21 | 张晓飞 | Pulp vitality temperature set tester |
-
2014
- 2014-09-18 CN CN201410477469.4A patent/CN104173113A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6491522B1 (en) * | 2000-08-09 | 2002-12-10 | Charles D. Jensen | Dental diagnostic system and method |
| US20060027553A1 (en) * | 2004-08-09 | 2006-02-09 | Hanisko Francis D | Heater for endodontic condenser |
| CN101563045A (en) * | 2006-10-18 | 2009-10-21 | 白李生物科技有限公司 | Endodontic instrument for root canal filling and heating tip adapted to the same |
| CN201500196U (en) * | 2009-08-01 | 2010-06-09 | 赵呈利 | Multifunctional oral diagnosis and treatment instrument |
| CN201798819U (en) * | 2010-09-01 | 2011-04-20 | 张武 | Multifunctional oral cavity diagnosis and treatment instrument |
| CN204106243U (en) * | 2014-09-18 | 2015-01-21 | 张晓飞 | Pulp vitality temperature set tester |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974968A (en) * | 2016-07-06 | 2016-09-28 | 简小冲 | Hot and cold pen device for oral diagnosis and treatment and uses thereof |
| CN109549737A (en) * | 2018-10-25 | 2019-04-02 | 中国科学院理化技术研究所 | A kind of portable pulp vitality detecting instrument |
| CN113288494A (en) * | 2021-06-16 | 2021-08-24 | 孙永红 | Dental diagnosis device with synchronous cold and hot probes and control method |
| TWI776734B (en) * | 2021-11-12 | 2022-09-01 | 霽邦有限公司 | Dental pulp activity detection device |
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Application publication date: 20141203 |