CN204106243U - Pulp vitality temperature set tester - Google Patents
Pulp vitality temperature set tester Download PDFInfo
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- CN204106243U CN204106243U CN201420537381.2U CN201420537381U CN204106243U CN 204106243 U CN204106243 U CN 204106243U CN 201420537381 U CN201420537381 U CN 201420537381U CN 204106243 U CN204106243 U CN 204106243U
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Abstract
The utility model discloses a kind of pulp vitality temperature set tester structure, have insulation and thermal insulation shell (1), its main feature is: be connected with the extensionality that can contact with facing at the two ends of insulation and thermal insulation shell (1) and insulate and lead warm cold junction (2a) and warm end (2b) is led in insulation; And be also provided with cold junction temperature control system and hot-side temperature control system in the inside of insulation and thermal insulation shell (1); When main switch (3) is pushed into " refrigeration " shelves, cold junction temperature can be down to rapidly 10 DEG C or following, and keeps stable, examines for cold; When main switch (3) is pushed into " heating " shelves, hot-side temperature can rise to rapidly 60 DEG C or more, and keeps stable, examines for heat.Cold junction of the present utility model, hot-side temperature are stable, visual, make check result more scientific and can repeat, its credibility and degree of accuracy high; Meanwhile, this utility model is esy to use, safe and reliable.
Description
Art
This utility model relates to a kind of pulp vitality temperature set tester, belongs to department of stomatology medical aid tool technical field.
Background technology
Dental pulp is the soft tissue being positioned at pulp cavity, surrounds the sclerous tissues such as dentin, enamel, have important physiological function outside it.When there is environmental stimuli, as bacteriological infection, physics and chemistry stimulation or immunoreation etc., can cause dental pulp disease, wherein bacteriological infection is Etiological.Dental pulp disease can be divided into polytype clinically, clinical manifestation and the treatment prognosis of every type 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 tested and only can be used for reacting the presence or absence suffering from tooth pulp vitality, different pathological states can not be indicated, and the test of pulp vitality temperature not only can point out the position of suffering from tooth, also can reflect the state suffering from sound of baby talk marrow, therefore the diagnosis of pulpitis more depends on the result of dental pulp temperature test.
The test of pulp vitality temperature is a kind of diagnostic method according to suffering from tooth and to check reaction that is cold or thermostimulation dental pulp state, its ultimate principle be suddenly, significantly variations in temperature can bring out dental pulp reaction to a certain degree or pain.Normal dental pulp has certain threshold of tolerance to hot and cold stimulation, generally with lower than 10 DEG C for cold stimulation, higher than 60 DEG C for thermostimulation, when dental pulp has a pathological changes, its temperature threshold of tolerance changes, and can cash as responsive or blunt, even reactionless hot and cold stimulation.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, the hot diagnostic method can select hot water, Warm gutta percha or heating metallic weapon 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 is higher than 10 DEG C, or thermostimulation source temperature is lower than 60 DEG C, then check result is incredible, may cause mistaken diagnosis, fail to pinpoint a disease in diagnosis; 2. with cold water, hot water for stimulus time, because water flow is excessive, often stimulate to by inspection suspicious periodontal tooth, if the tooth by inspection tooth side is just trouble tooth, during inspection, patients goes out the reaction of pulpitis, then clinician can take for by inspection tooth is trouble tooth, causes mistaken diagnosis; 3. for providing hot and cold stimulus to need to be equipped with the facility 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, this utility model provides a kind of stable performance, registration, pulp vitality temperature set tester esy to use, safe and reliable.
This utility model solves the problems of the technologies described above adopted technical scheme: pulp vitality temperature set tester (see Fig. 1,2) of the present utility model, there is insulation and thermal insulation shell (1), it is characterized in that the two ends of insulation and thermal insulation shell (1) are connected with the extensionality that can contact with facing and insulate and lead warm cold junction (2a) 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) insulate with extensionality respectively and leads warm cold junction (2a) and extensionality and insulate and lead warm end (2b) and contact.
In technique scheme of the present utility model, switch temperature≤10 DEG C of negative tempperature coefficient thermistor (5a), the switch temperature of semistor (5b) is preferably set to >=and 60 DEG C.Extensionality of the present utility model insulation is led warm cold junction (2a) and insulation and is led warm end (2b) and preferably adopt the ceramic material of insulating heat-conductive to form.Main switch of the present utility model (3) is made up 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 utility model is as follows.
One, quasiconductor of the present utility model is divided into N-type semiconductor (6a) and P-type semiconductor (6b), its cooling and warming principle is: when the thermocouple centering that one block of N-type semiconductor material and one block of P-type semiconductor material are coupled to has electric current to pass through, transfer of heat will be produced between two ends, the joint that electric current flows to P type element by N-type element absorbs heat, become cold junction, flowed to the joint release heat of N-type element by P type element, become hot junction.The size of heat absorption and release is decided by the element logarithm of the size of electric current and semi-conducting material N, P-type semiconductor.The two ends of quasiconductor (6a, 6b) respectively with insulation but guide temp can be good ceramic contact, temperature transfer to extensionality insulation can be led on warm cold junction, hot junction and (illustrate: the cold junction in Fig. 1, hot junction all adopt elbow structure).By selecting the power supply of suitable voltage and N, the P-type semiconductor element pair of suitable quantity, cold junction temperature≤10 DEG C can be realized, hot-side temperature >=60 DEG C.
Its two, critesistor of the present utility model 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, when temperature exceed or lower than switch temperature time, resistance can increase severely instantaneously.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 switches temperature, can by cold, the temperature in hot junction controls 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 lower than critesistor (5a) switch temperature (switch temperature≤10 DEG C), critesistor 5a resistance value sharply increases, in circuit, almost no current passes through, N, P-type semiconductor element stops heat trnasfer, and when cold junction potsherd temperature is higher than switch temperature, critesistor (5a) resistance sharply diminishes, in circuit, electric current increases, N, P-type semiconductor element restarts heat trnasfer, thus 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 higher than critesistor (5b) switch temperature (switch temperature >=60 DEG C), critesistor (5b) resistance value sharply increases, in circuit, almost no current passes through, N, P-type semiconductor element stops heat trnasfer, and when hot junction potsherd temperature is lower than switch temperature, critesistor (5b) resistance sharply diminishes, in circuit, electric current increases, N, P-type semiconductor element restarts heat trnasfer, thus hot-side temperature is controlled near critesistor (5b) switch temperature.
They are three years old, thermindicator (4) is divided into 4a, 4b, converted by ammeter, 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 by supply voltage divided by circuital current counting circuit total resistance value obtains thermosensitive resistance, then table look-up and obtain temperature value, otherwise, the resistance of critesistor under different temperatures is obtained by tabling look-up, then the current value in circuit at this temperature is calculated, just temperature value can be mapped with the reading of ammeter, the scale value of ammeter is changed into temperature value, can ammeter be repacked into thermindicator.By selecting the ammeter of suitable range, then repacking thermindicator into, can be used for pointing out doctor's temperature when to reach hot and cold and examining inspection requirements.
They are four years old, main switch (3) is by blade (7), contact (8) and insulating guide rod (9) composition, wherein blade (7) is divided into 7a, 7b, 7a and 7b is connected to by insulating guide rod (9) and is integrated, contact (8) is divided into 8a, 8b, 8c, 8d, 8e, 8f, contacted with different contact (8) by mobile insulating guide rod (9) band cutting blade (7), different circuit can be connected, concrete operations are: main switch (3) is pushed into " refrigeration " shelves, namely blade 7a contacts with contact 8a, blade 7b contacts with contact 8d, circuit ON, electric current passes through N, P element, cold junction freezes, now in circuit, negative temperature coefficient thermistor 5a plays refrigeration end temperature control action, thermindicator 4a asks for pointing out doctor's temperature when to reach cold essentials for diagnosis, and positive temperature coefficient thermistor 5b and thermindicator 4b is not in circuit at this moment, the two does not all work, main switch (3) is pushed into " closedown " shelves, namely blade 7a contacts with contact 8b, blade 7b contacts with contact 8e, circuitry cuts, main switch (3) is pushed into " heating " shelves, namely blade 7a contacts with contact 8c, blade 7b contacts with contact 8f, circuit ON, 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 asks for pointing out doctor's temperature when to reach hot essentials for diagnosis, and negative temperature coefficient thermistor 5a and thermindicator 4a is not in circuit at this moment, the two does not all work.
Visible, this utility model has fully utilized semiconductor refrigerating technology, temperature control technology, Temperature displaying technology.
This utility model 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 by inspection tooth, and can not involve adjacent teeth, degree of accuracy is high; 3. the diagnostic method hot and cold with tradition needs compared with auxiliary facility, and the present invention is esy to use, safe and reliable.
Accompanying drawing explanation
This utility model structure is further illustrated below in conjunction with drawings and Examples:
Fig. 1 is the surface structure schematic diagram of this utility model pulp vitality temperature set tester;
Fig. 2 is the internal circuit configuration schematic diagram of Fig. 1.
Detailed description of the invention
By the following examples the present invention is further described specifically.Be necessary to point out, below the explanation of embodiment just to this utility model structure, the restriction to this utility model protection domain can not be interpreted as.
embodiment 1:, this utility model is used for that pulp vitality is cold examines test
To be that pulp vitality is cold examine test to the present embodiment.After doctor determines suspicious tooth by understanding patient main suit, history of present illness, history of past illness, need that cold the examining of pulp vitality is carried out to all suspicious teeth and test to locate trouble tooth.After handing over the symptom that may occur in checking process to patient, every wet, dry up facing, the main switch 3 of this utility model pulp vitality temperature set tester is pushed into refrigeration shelf, now blade 7a contacts with contact 8a, blade 7b contacts with contact 8d, circuit ON, 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, faint electric current is only had to pass through in circuit, cold junction temperature keeps stable, thermindicator 4a can point out doctor now cold junction temperature reached cold essentials for diagnosis and asked, extensionality insulation can be led warm cold junction (2a) and be placed in by inspection dental surface by doctor, check that suspicious tooth is to cold reaction of examining.After inspection, main switch 3 is pushed into closedown shelves, now circuit disconnects, and cold junction temperature replys room temperature gradually.
embodiment 2: this utility model is used for pulp vitality heat and examines test
The present embodiment is that pulp vitality heat examines test.After doctor determines suspicious tooth by understanding patient main suit, history of present illness, history of past illness, need that pulp vitality heat is carried out to all suspicious teeth and examine test to locate trouble tooth.After handing over the symptom that may occur in checking process to patient, every wet, dry up facing, the main switch 3 of this utility model pulp vitality temperature set tester is pushed into and heats shelves, now blade 7a contacts with contact 8c, blade 7b contacts with contact 8f, circuit ON, 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, faint electric current is only had to pass through in circuit, hot-side temperature keeps stable, thermindicator 4b can point out doctor now hot-side temperature reached hot essentials for diagnosis and asked, extensionality insulation can be led warm end 2b and be placed in by inspection dental surface by doctor, check the reaction that suspicious tooth is examined heat.After inspection, main switch 3 is pushed into closedown shelves, now circuit disconnects, and hot-side temperature replys room temperature gradually.
When needs simultaneously to suspicious tooth carry out cold examine and heat examines inspection time, only need by above-described embodiment 1,2 blocked operation.
Claims (4)
1. a pulp vitality temperature set tester, has insulation and thermal insulation shell (1), it is characterized in that the two ends of insulation and thermal insulation shell (1) are connected with the extensionality that can contact with facing and insulate and lead warm cold junction (2a) 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) insulate with extensionality respectively and leads warm cold junction (2a) and extensionality and insulate and lead warm end (2b) and contact.
2. pulp vitality temperature set tester according to claim 1, is characterized in that switch temperature≤10 DEG C of negative tempperature coefficient thermistor (5a), switch temperature >=60 DEG C of semistor (5b).
3. pulp vitality temperature set tester according to claim 1, is characterized in that extensionality insulation is led warm cold junction (2a) and insulation and led warm end (2b) and adopt the ceramic material of insulating heat-conductive to form.
4. the pulp vitality temperature set tester according to claim 1,2 or 3, it is characterized in that main switch (3) is made up 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 |
|---|---|---|---|
| CN201420537381.2U CN204106243U (en) | 2014-09-18 | 2014-09-18 | Pulp vitality temperature set tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420537381.2U CN204106243U (en) | 2014-09-18 | 2014-09-18 | Pulp vitality temperature set tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204106243U true CN204106243U (en) | 2015-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420537381.2U Expired - Fee Related CN204106243U (en) | 2014-09-18 | 2014-09-18 | Pulp vitality temperature set tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204106243U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104173113A (en) * | 2014-09-18 | 2014-12-03 | 张晓飞 | Pulp vitality temperature detector |
| CN105974968A (en) * | 2016-07-06 | 2016-09-28 | 简小冲 | Hot and cold pen device for oral diagnosis and treatment and uses thereof |
-
2014
- 2014-09-18 CN CN201420537381.2U patent/CN204106243U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104173113A (en) * | 2014-09-18 | 2014-12-03 | 张晓飞 | Pulp vitality temperature detector |
| CN105974968A (en) * | 2016-07-06 | 2016-09-28 | 简小冲 | Hot and cold pen device for oral diagnosis and treatment and uses thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 Termination date: 20170918 |