CN101912316B - Tooth-touch-function digital test system - Google Patents
Tooth-touch-function digital test system Download PDFInfo
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- CN101912316B CN101912316B CN2010102367464A CN201010236746A CN101912316B CN 101912316 B CN101912316 B CN 101912316B CN 2010102367464 A CN2010102367464 A CN 2010102367464A CN 201010236746 A CN201010236746 A CN 201010236746A CN 101912316 B CN101912316 B CN 101912316B
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Abstract
The invention relates to a tooth-touch-function digital test system comprising a force application device and an accessory test device. The used psychophysics method is a minimum touch threshold limiting method. The force application device is called as a touch threshold-limit test instrument comprising a touch threshold-limit probe which comprises a cusp is a 2mm diameter nylon ball, a test and control box and a PC (Personal Computer) end data analysis software system; the accessory test device comprises a metal fixing body, a nylon block and a nylon ring; a nylon ball at the tip of the touch threshold-limit probe is perpendicular to five surfaces of the nylon block to apply force, or the nylon ring is lifted by the tip upwards, therefore, passive touch threshold-limitation applied to six orthogonal directions of a lip-cheek direction, a tongue direction, a mesial direction, a distal direction, a downward direction (towards a root direction) and an upward direction (towards a crown direction) of a single crown supported by natural teeth and a planting body are respectively measured.
Description
Affiliated technical field
The present invention relates to a kind of tooth-touch-function digital test system that can carry out the 3 D multi-directional detection to the tooth feeling function.
Background technology
The tooth sense of touch is the basis of oral cavity functionating.In the process of laboratory rodent chow, the feedback information of periodontal mechanoreceptor helps stomatognathic system adjustment in time to chew activity, accomplishes the process of laboratory rodent chow smoothly; In clinical treatment, the feeling function of periodontal mechanoreceptor can assist the doctor to judge the interlock situation of dummy.The tooth feeling function has neuro physiology and two kinds of research methoies of psychophysics, and the latter is a Noninvasive, thereby is widely used.In the psychophysics research; Can be applied to through the strength that will increase gradually on the tooth; Whether the inquiry experimenter feels to judge tactile sensitivity, and the just sentient power value of experimenter is passive (be not interlock of tooth, but strength is applied on the tooth) touch threshold; Its value is low more, shows that sense of touch is more responsive.Because the sense of touch of tooth is very sharp, therefore, requires force application apparatus that very high resolution is arranged, and makes its measuring range lower limit be lower than the touch threshold of natural teeth; Because mouth cavity planting body application now is increasingly extensive, the related tactile functional study is increasing, therefore, requires the upper limit of the measuring range of force application apparatus to be higher than the touch threshold that implantation body supports leaf-comb; Because tooth has different tooth positions backward, therefore, requires instrument to measure the tooth of last lower jaw different tooth position in the past; Because the touch threshold of tooth all directions is different, therefore, requires force application apparatus can change application of force direction neatly, to carry out the detection of different directions; Because the scrambling of tooth contour needs a cover testing auxiliary device to guide force application apparatus along the specific direction application of force; Because psychophysics research is subject to the influence of various factors, therefore adopt suitable experimental program and psychophysical method.The test macro of good tooth feeling function can satisfy this six requirements preferably, and auxiliary dentist makes more perfect mouth mending material (supporting leaf-comb or the like like ceramic crown, all-ceramic crown and implantation body), ensures human oral health better.At present; Domestic correlational study is a blank; Applied test macro has the silver amalgam filling device (there is pick off the working end) that can directly apply to passive touch threshold detection in the external psychophysics research; Also have and the bonded various electronic or air operated force application apparatus of corresponding auxiliary device, but all can not satisfy above-mentioned requirements fully; Though the test macro in the neuro physiology research is different with application of the present invention, especially resolution can not satisfy the requirement of natural teeth, can satisfy other requirement of passive touch threshold test.
In sum, have following technical problem in the prior art: existing test macro can not satisfy each item requirement of tooth feeling function test fully, often needs exploitation again.
Summary of the invention
The deficiency that exists for the test macro that overcomes existing tooth feeling function; The present invention provides a kind of tooth-touch-function digital test system; Can be neatly to the feeling function of a plurality of teeth along a plurality of direction test teeth; Its measuring range lower limit is lower than the natural teeth touch threshold, and the upper limit is higher than the touch threshold that implantation body supports leaf-comb; Adopt suitable psychological physic science study method to be used for the tooth feeling function is carried out psychophysics research simultaneously.
Tooth-touch-function digital test system of the present invention; Can accomplish six quadratures (perpendicular to force surface) direction that natural teeth and implantation body support leaf-comb (go up infradentale to first molar near in half one), promptly the lip cheek to, tongue to, near in to, far away in to, the detection of (Xiang Genfang) and (Xiang Guanfang) the passive touch threshold that makes progress downwards.The measurement of high, the suitable sensitive natural teeth of feeling function of the force application apparatus resolution in this system, its measuring range lower limit is lower than the touch threshold of natural teeth, and the upper limit is higher than the touch threshold that implantation body supports leaf-comb.Experimental program among the present invention mainly comprises to be worn with eyeshield and use wideband noise, and psychophysical method is minimum touch threshold method.Key is that the resolution of force application apparatus is high, and the lower limit of measuring range is lower than the touch threshold of natural teeth; Force application apparatus and testing auxiliary device are convenient to exactly along six orthogonal directions the tooth application of force; Adopt the minimum touch threshold method of psychophysics.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of tooth-touch-function digital test system comprises force application apparatus and testing auxiliary device.Force application apparatus is called the touch threshold tester, comprises the touch threshold probe, and its tip is nylon ball, observing and controlling box and the PC end data analyzing software system of a diameter 2mm; Testing auxiliary device comprises metal retainer, nylon square and nylon ring.
Contacting of five surfaces of the nylon ball of touch threshold probe tip and nylon square is the sphere contact; Make the probe can be through the measure that reduces the coefficient of friction between the two perpendicular to the nylon square surface application of force; If out of plumb, probe will skid on nylon square surface.The measure of the power of reducing friction comprises uses 600 orders and 2000 purpose sand papering nylon squares surface successively, in the test process at nylon square and a little liquid paraffin of nylon ball surfaces coated.
The body of touch threshold probe adopts the square column type design, more is prone to accurately control application of force direction than cylinder design, makes it perpendicular with the built-in resistance strain gage of body.
The body built-in resistor foil gauge of touch threshold probe can detect the size that applies strength through probe, and dynamically shows and record through observing and controlling box and PC end data analyzing software system; Permanent deformation can not take place when receiving 5000mN and following power in resistance strain gage, guarantees that the apparatus measures range limit is higher than the passive touch threshold that implantation body supports leaf-comb; The resolution of touch threshold tester can reach 1mN, guarantees that apparatus measures scope lower limit is lower than the passive touch threshold limit value of natural teeth.
The observing and controlling box adopts touch liquid crystal display, can demarcate and rezero operation the touch threshold tester easily.
The nylon ball of touch threshold probe tip and the nylon square in the testing auxiliary device, nylon ring all adopt nylon material; Neither yielding when therefore interacting; Be difficult for producing impulsive force again, the latter avoids producing the interference shock wave and activates the internal ear sensor, influences the accuracy of measurement data.
The effect of metal retainer is that nylon square and nylon ring are fixed on the tooth, half one during its position is can be from the central incisor to the first molar near, thus guaranteed detection to the touch threshold of the tooth of different tooth position; Therefore nylon square length of side 3mm, avoids nylon ball contact dental surface, avoids overextended mouth opening to activate the muscle joint receptor simultaneously; Nylon ring is positioned at the dolly dimple of metal retainer tissue surface, has avoided the influence to maintenance power.
The combination of force application apparatus and testing auxiliary device can realize the detection of six passive touch thresholds of orthogonal direction.
When apply the lip cheek to, tongue to, near in, far away in, downwards during the strength of (Xiang Genfang) five orthogonal directions, the nylon ball of touch threshold probe tip perpendicular to five surperficial application of forces of nylon square.
When applying the strength of make progress (Xiang Guanfang), the touch threshold probe tip will upwards lift nylon ring.
Can be used for the measurement of the passive touch threshold of psychophysics.
The experimental program of psychophysics comprises the interference of wearing with eyeshield and isolated respectively eyes of earphone and internal ear sensor, and the experimenter is seated on the tooth chair, and upper body is upright.
The psychophysical method that adopts is minimum touch threshold method; Earlier the nylon ball of touch threshold probe tip carefully is placed into the central authorities of nylon cube test face; Slight contact and pressure is not arranged; Apply stable strength since 0 afterwards and felt the stimulation on the tooth, note the power value size of this moment, and get 3 times average as passive touch threshold limit value up to subjects reported.
The invention has the beneficial effects as follows that the resolution of instrument is high, the measurement direction number is many and adopt psychophysical method.The resolution of 1mN makes the lower limit of measuring range can comprise the touch threshold of natural teeth basically; The measurement direction number is increased to six, promptly can carry out 3 D multi-directional and detect; Adopt the minimum touch threshold method of psychophysics.
Description of drawings
Fig. 1 is the structure and the ingredient of touch threshold tester
Fig. 2 is the ideograph of touch threshold probe and the circuit diagram of observing and controlling box
Fig. 3 is the composition and the schematic diagram of testing auxiliary device
Fig. 4 is the preparation of testing auxiliary device and uses flow chart
Fig. 5 is experimental program and psychophysical method
The specific embodiment
Describe the present invention according to accompanying drawing below, it is a kind of preferred embodiment in the numerous embodiments of the present invention.
Structure and ingredient for the touch threshold tester among the present invention shown in Figure 1, this touch threshold tester has three main portions:
Observing and controlling box 2 adopts accurate appearance with the two serial ports single-chip microcomputer STC12C5A32S2+RS232 mouth touch LCD screens of operational amplifier INA114+16 position analog-digital converter AD7705+; Wherein between AD7705 and single-chip microcomputer through the communication of SPI mouth agreement, connect through serial ports between touch LCD screen and the single-chip microcomputer, also be connected between single-chip microcomputer and upper PC through serial ports.Ergometer adopts multi-point calibration, and multistage broken line interpolation realizes high-acruracy survey.
PC end data analyzing software system 3.
Shown in Figure 2 is the ideograph of the touch threshold probe among the present invention and the circuit diagram of observing and controlling box.In the ideograph of touch threshold probe, following structure and parameter is arranged:
Resistance strain gage pressure transducer 13
Lead-in wire 15
In the circuit diagram of observing and controlling box, ABCD and the length of 1234 expression drawings and the division of cross direction.
Composition and schematic diagram for the testing auxiliary device among the present invention shown in Figure 3
Testing auxiliary device is made up of metal retainer 4, nylon square 5 and nylon ring 6.
Thereby the principle of testing auxiliary device be application of force direction perpendicular to five surfaces of nylon square apply the lip cheek to 51, tongue to 52, near in 53, far away in 54 and the strength of downward 55 5 orthogonal directions.Apply upwards 61 strength through nylon ring.
Shown in Figure 4 is the preparation and the use flow chart of testing auxiliary device
The making 41 of metal retainer wax pattern
Casting of metal retainer and polishing finish 42
Metal retainer, nylon square and nylon ring are located on the model 43
Metal retainer, nylon square and nylon ring bond on the natural teeth 44
Use polish successively five surfaces of nylon square of 600 orders and 2000 purpose sand paper, can improve the surface smooth degree, reduce the coefficient of friction between nylon ball and the nylon square; On the nylon ball of nylon square and touch threshold detecting probe surface, be coated with a little liquid paraffin before the mouth build-in test and can further reduce the coefficient of friction between the two.Therefore, nylon ball and nylon square carry out sphere when contacting, and strength skidding then occurs if be not orthogonal to the square surface, can't the application of force.
Shown in Figure 5 is experimental program and the psychophysical method that the present invention adopted
Experimental program 7 mainly comprises and wears the interference that is used for isolated eyes and internal ear sensor with eyeshield 71 and earphone 72, operator experimenter's position 73
Psychophysical method 8, employing be minimum touch threshold method 81, require since 0 to apply stable strength, felt the stimulation on the tooth up to subjects reported
Combine accompanying drawing that the present invention has been carried out exemplary description above; Obviously the concrete realization of the present invention does not receive the restriction of aforesaid way; As long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; Or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (13)
1. tooth-touch-function digital test system; Comprise force application apparatus and testing auxiliary device; It is characterized in that; Force application apparatus is called the touch threshold tester, comprises touch threshold probe (1), and its tip is nylon ball (11), observing and controlling box (2) and the PC end data analyzing software system (3) of a diameter 2mm; Testing auxiliary device comprises metal retainer (4), nylon square (5) and nylon ring (6).
2. tooth-touch-function digital test system as claimed in claim 1; It is characterized in that; Contacting of five surfaces of the nylon ball of touch threshold probe tip and nylon square is the sphere contact; Make the probe can be perpendicular to the nylon square surface application of force through the measure that reduces the coefficient of friction between the two, if out of plumb, probe will skid on nylon square surface; The measure of the power of reducing friction comprises uses 600 orders and 2000 purpose sand papering nylon squares surface successively, in the test process at nylon square and a little liquid paraffin of nylon ball surfaces coated.
3. tooth-touch-function digital test system as claimed in claim 1; It is characterized in that; The body of touch threshold probe (14) adopts the square column type design, more is prone to accurately control application of force direction than cylinder design, makes it perpendicular with body built-in resistor foil gauge (13).
4. tooth-touch-function digital test system as claimed in claim 1; It is characterized in that; The body built-in resistor foil gauge of touch threshold probe can detect the size that applies strength through probe, and dynamically shows and record through observing and controlling box and PC end data analyzing software system; Permanent deformation can not take place when receiving 5000mN and following power in resistance strain gage, guarantees that the apparatus measures range limit is higher than the passive touch threshold that implantation body supports leaf-comb; The resolution of touch threshold tester can reach 1mN, guarantees that apparatus measures scope lower limit is lower than the passive touch threshold limit value of natural teeth.
5. tooth-touch-function digital test system as claimed in claim 1 is characterized in that, the observing and controlling box adopts touch liquid crystal display (2), can demarcate and rezero operation the touch threshold tester easily.
6. tooth-touch-function digital test system as claimed in claim 1; It is characterized in that; Nylon square (5), nylon ring (6) in nylon ball of touch threshold probe tip (11) and the testing auxiliary device all adopt nylon material, and be neither yielding when therefore interacting, and is difficult for producing impulsive force again; The latter avoids producing the interference shock wave and activates the internal ear sensor, influences the accuracy of measurement data.
7. tooth-touch-function digital test system as claimed in claim 1; It is characterized in that; The effect of metal retainer (4) is that nylon square and nylon ring are fixed on the tooth; Half one during its position is can be from the central incisor to the first molar near, thus detection guaranteed to the touch threshold of the tooth of different tooth position; Therefore nylon square (5) length of side 3mm, avoids nylon ball contact dental surface, avoids overextended mouth opening to activate the muscle joint receptor simultaneously; Nylon ring (6) is positioned at the dolly dimple of metal retainer tissue surface, has avoided the influence to maintenance power.
8. tooth-touch-function digital test system as claimed in claim 1 is characterized in that the combination of force application apparatus and testing auxiliary device can realize the detection of six passive touch thresholds of orthogonal direction.
9. tooth-touch-function digital test system as claimed in claim 8; It is characterized in that; When apply the lip cheek to (51), tongue to (52), near in (53), far away in (54), downwards during the strength of (55) five orthogonal directions, the nylon ball of touch threshold probe tip is perpendicular to five surperficial application of forces of nylon square.
10. tooth-touch-function digital test system as claimed in claim 9 is characterized in that, when applying the strength of make progress (61), the touch threshold probe tip will upwards lift nylon ring.
11. tooth-touch-function digital test system as claimed in claim 1 is characterized in that, can be used for the measurement of the passive touch threshold of psychophysics.
12. tooth-touch-function digital test system as claimed in claim 11; It is characterized in that; The experimental program of psychophysics comprises the interference of wearing with eyeshield (71) and isolated respectively eyes of earphone (72) and internal ear sensor, and the experimenter is seated on the tooth chair, upper body upright (73).
13. tooth-touch-function digital test system as claimed in claim 11; It is characterized in that the psychophysical method of employing is a minimum touch threshold method (81), earlier the nylon ball of touch threshold probe tip carefully is placed into the central authorities of nylon cube test face; Slight contact and pressure is not arranged; Apply stable strength since 0 afterwards and felt the stimulation on the tooth, note the power value size of this moment, and get 3 times average as passive touch threshold limit value up to subjects reported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102367464A CN101912316B (en) | 2010-07-27 | 2010-07-27 | Tooth-touch-function digital test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102367464A CN101912316B (en) | 2010-07-27 | 2010-07-27 | Tooth-touch-function digital test system |
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| Publication Number | Publication Date |
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| CN101912316A CN101912316A (en) | 2010-12-15 |
| CN101912316B true CN101912316B (en) | 2012-12-05 |
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| CN103202734B (en) * | 2013-04-18 | 2014-12-10 | 东南大学 | Friction test experiment table of orthodontic appliance |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008125872A (en) * | 2006-11-22 | 2008-06-05 | Kaohsiung Medical Univ | Dental occlusal force measuring device and measurement system |
| JP2009172411A (en) * | 2001-05-31 | 2009-08-06 | Image Navigation Ltd | Image guided implantology method |
| CN201500196U (en) * | 2009-08-01 | 2010-06-09 | 赵呈利 | Multifunctional oral diagnosis and treatment instrument |
| CN201855314U (en) * | 2010-07-27 | 2011-06-08 | 北京大学口腔医学院 | Digital testing system for tooth touch function |
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2010
- 2010-07-27 CN CN2010102367464A patent/CN101912316B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009172411A (en) * | 2001-05-31 | 2009-08-06 | Image Navigation Ltd | Image guided implantology method |
| JP2008125872A (en) * | 2006-11-22 | 2008-06-05 | Kaohsiung Medical Univ | Dental occlusal force measuring device and measurement system |
| CN201500196U (en) * | 2009-08-01 | 2010-06-09 | 赵呈利 | Multifunctional oral diagnosis and treatment instrument |
| CN201855314U (en) * | 2010-07-27 | 2011-06-08 | 北京大学口腔医学院 | Digital testing system for tooth touch function |
Non-Patent Citations (1)
| Title |
|---|
| 张成飞.压力敏感探针测定牙齿敏感症的临床评价.《中华口腔医学杂志》.1995, * |
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