CN104299500A - Root canal preparation effect detection method and device in stomatology teaching - Google Patents
Root canal preparation effect detection method and device in stomatology teaching Download PDFInfo
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- CN104299500A CN104299500A CN201410131264.0A CN201410131264A CN104299500A CN 104299500 A CN104299500 A CN 104299500A CN 201410131264 A CN201410131264 A CN 201410131264A CN 104299500 A CN104299500 A CN 104299500A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 222
- 210000004262 dental pulp cavity Anatomy 0.000 title claims abstract description 116
- 230000000694 effects Effects 0.000 title claims abstract description 40
- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 239000011347 resin Substances 0.000 claims abstract description 99
- 229920005989 resin Polymers 0.000 claims abstract description 99
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000001045 blue dye Substances 0.000 claims abstract description 5
- 238000004088 simulation Methods 0.000 claims description 45
- 238000011156 evaluation Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000004218 Orcein Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 235000019248 orcein Nutrition 0.000 claims description 4
- 238000002591 computed tomography Methods 0.000 claims description 3
- 238000007639 printing Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 4
- 239000001044 red dye Substances 0.000 abstract 1
- 210000004268 dentin Anatomy 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 208000024216 Periapical disease Diseases 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 208000019786 dental pulp disease Diseases 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000002560 therapeutic procedure Methods 0.000 description 2
- 210000001114 tooth apex Anatomy 0.000 description 2
- 208000002599 Smear Layer Diseases 0.000 description 1
- 230000035508 accumulation Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 208000027866 inflammatory disease Diseases 0.000 description 1
- 230000002757 inflammatory effect Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 210000000214 mouth Anatomy 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 210000004053 periapical tissue Anatomy 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 210000004233 talus Anatomy 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/28—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for medicine
- G09B23/283—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for medicine for dentistry or oral hygiene
Abstract
The invention discloses a root canal preparation effect detection method and device in stomatology teaching. The method is characterized by dying a transparent resin tooth model or a transparent resin simulated root canal before and after the root canal preparation with blue dye and red dye respectively and then carrying out digital fixed focus shooting; extracting contour of the outer wall of the root canal before and after preparation and the central axis of the root canal before and after preparation in shot mages by utilizing image processing software, and setting a plurality of mark points before and after preparation at intervals on the central axis of the root canal before and after preparation; and finally, carrying out overlapping comparison on the corresponding images, determining the relative positions of the corresponding mark points on the comparison image to detect and estimate the preparation effect of the root canal. The device is mainly formed by a protractor arranged on a base, a rotation shaft arranged in the center hole of the protractor, a base platform arranged at the upper end of the rotation shaft and used for fixing the transparent resin tooth model or the transparent resin simulated root canal, and a digital camera connected with a computer. According to the root canal preparation effect detection method and device in stomatology teaching, students and teachers can visually estimate the change of shape of the root canal before and after preparation conveniently.
Description
Technical field
The invention belongs to dentistry teaching field, refer to root canal preparation effect detection method and device thereof in the teaching of a kind of dentistry particularly.
Background technology
Dental pulp disease and periapical disease are inflammatory diseases that is common in oral cavity, that caused by various extraneous factor.Root canal therapy is at present for dental pulp disease and the most effective a kind of therapeutic modality of periapical disease, its by perfect root canal preparation to reach the object of inflammatory and downright bad material in thoroughly removal pulp cavity and periapical tissue.Therefore, the quality of root canal preparation is depended in the success or not of root canal therapy to a great extent.Root canal preparation comprises mechanical preparation and root canal irrigation, and high-quality root canal preparation should be by the mechanical preparation of root canal appliance and chemical flush thoroughly, substantially removes detritus on root canal wall and smear layer.First, the mechanical preparation of root pipe complies with root pipe direction by the root canal file of various stainless steel or NiTi material evenly to cut tube wall, if root canal curvature, tiny or irregular, then can produce in preliminary procedure and depart from that root pipe is former to be walked to cut open direction, the preparation of curved outside dentine puts in place by too cutting to cause dentine inside root canal curvature, or produce step in the tip of a root 1/3rd region, perforation, tip of a root chain pull open, or the problem such as tip of a root skew.Moreover irregular due to the anatomic form of root pipe, conventional root canal appliance can not connect with everywhere dentine in root pipe and contact.There are some researches show, the area of nearly 61% cannot be prepared device contacts, therefore cannot be removed the part dentine of infection completely by the method for mechanical preparation, and chemical flush plays very important supplementary function for the cleaning of root pipe after mechanical preparation fully.
At present, MED, before entering clinical practice stage, adopts the Isolated Tooth pulled out from clinical collection to carry out the exercise of root canal preparation usually.Tooth physiology has complicated root canal system structure, as main root pipe, collateral pulp canal, Accessory canals, Gen Guanxia district, root pipe communicating branch, tip of a root bifurcated and difference etc.Student uses Isolated Tooth to carry out the operate learning of root canal preparation, can know from experience the labyrinth of root pipe more vividly, the gap between reducing that practice and clinical chair are other and operate, and enhancing is seen and treated patients the confidence of patient in the future.
But the dentine of natural teeth is opaque material, and the effect of students' root canal preparation cannot observe directly, and is unfavorable for that students feed back the operating effect of self, is also unfavorable for Teacher Evaluation student achievement.For the problems referred to above, have scholar to rive assess the effect of root canal preparation by through mechanical preparation and the tooth after rinsing, but this method cannot by mechanical preparation and the effect after rinsing and before root pipe original state compare.In order to solve the problem, separately have scholar first by preparation before root pipe cross-section be three cross sections, after reversal film record xsect root canal morphology, recover the continuity of root pipe and carry out preparing and rinsing, and then by three items, again with reversal film record xsect root canal morphology, and compare with root pipe before, thus the effect of root canal preparation is assessed.But the weak point of this method is: be no matter longitudinally rive or cross-sectionly to section, all can only reflect the local form of root pipe, and cannot accurate assurance for the overall condition of root pipe.Therefore, the effect of student's root canal preparation and flushing all can not be assessed well with above two kinds of Isolated Tooth models.
It should be noted that simultaneously, teacher only leaned on visual inspection and micro-judgment to the evaluation of student's root canal preparation quality in the past, the error caused because of different judgment criteria between vision deviation and different teacher cannot be avoided, thus be difficult to guarantee prepares the assessment of root pipe accuracy and objectivity to each student.
Therefore, how to keep the original complicated root canal system structure of tooth, overcome the obstacle that dentine opacity is brought, thus student can be experienced close to the root canal preparation that clinical chair is other most possibly in practice, simultaneously can objective, the change that accurately reflects form before and after root canal preparation, so that teacher carries out assessing and instructing, for the problem of these two aspects, there is not yet corresponding teaching mode and solution both at home and abroad at present.
Summary of the invention
Root canal preparation effect detection method and device thereof during object of the present invention will provide a kind of dentistry to impart knowledge to students exactly, for the detection of teaching process middle school student root canal preparation effect, the form combined with concrete data with visual image accurately reflects the change of form before and after root canal preparation, is convenient to the change that student and teacher assess form before and after root canal preparation intuitively.
For achieving the above object, root canal preparation effect detection method in the dentistry teaching designed by the present invention, comprises the steps:
1) the transparent resin dental cast before root canal preparation or the effective blue dyes of transparent resin simulation root are dyeed to its root canal system;
2) root canal system being dyed that blue transparent resin dental cast or transparent resin simulation root pipe be fixed on can on the base station that rotates freely of level;
3) for transparent resin dental cast, with its corona buccal surface for horizontal frontal plane; For transparent resin simulation root pipe, with the central axis plane in complete display root canal curvature direction for horizontal frontal plane; Digital camera lens is focused shooting with the direction perpendicular to this horizontal frontal plane to transparent resin dental cast or transparent resin simulation root pipe, obtains the front direct picture of preparation;
4) digital camera lens unchanged direction is kept, base station is rotated 45 ° and 90 ° respectively along same sense of rotation, and in the position of 45 ° and 90 °, shooting is focused to transparent resin dental cast or transparent resin simulation root pipe, obtain the front deflection image of preparation and preparation leading flank image respectively;
5) deflection image before direct picture, preparation before gained preparation and preparation leading flank image are stored in computing machine, root tube hub axis before root pipe outer wall profile, preparation before the preparation utilizing image processing software to extract in each image, and before preparation on root tube hub axis interval set gauge point before multiple preparation;
6) take off the complete transparent resin dental cast of shooting or transparent resin simulation root pipe, carry out root pipe mechanical preparation by clinical procedure;
7) washing fluid is adopted to clean the transparent resin dental cast after root pipe mechanical preparation or transparent resin simulation root pipe;
8) drying is carried out to the complete transparent resin dental cast of cleaning or transparent resin simulation root pipe, then with orchil, its root canal system is dyeed;
9) root canal system being dyed red transparent resin dental cast or transparent resin simulation root pipe retightens can on the base station that rotates freely of level;
10) above-mentioned steps 3 is repeated) and the operation of step 4), direct picture, preparation post deflection image and prepare trailing flank image after obtaining preparation;
11) direct picture, preparation post deflection image and preparation trailing flank image after gained preparation are stored in computing machine, root tube hub axis after root pipe outer wall profile, preparation after the preparation utilizing image processing software to extract in each image, and after preparation gauge point after the multiple preparation one to one of gauge point position before interval setting and described multiple preparation on root tube hub axis;
12) recycle image processing software by direct picture after direct picture before preparation and preparation, prepare before deflection image and preparation post deflection image, prepare leading flank image and carries out overlap ratio pair with preparation trailing flank image, to determine on comparison chart picture root tube hub axis before preparation and prepare the relative position of rear root tube hub axis;
13) distance before the multiple preparations finally utilizing image processing software to measure before preparation on root tube hub axis respectively after gauge point and preparation on root tube hub axis after multiple preparation one to one between gauge point, can the preparation effect of check and evaluation root pipe.
Preferably, described transparent resin dental cast is the root canal system based on the true Isolated Tooth of microscopic CT scanning, based on the original DICOM data of gained, macroscopic view and the bionical 3 D-printing stl file of microcosmic is obtained by Mimics software 3D processing, and stl file data are carried out Model Reconstruction, be committed to high precision 3D printer, use transparent resin material to be made.Like this, Reality simulation Isolated Tooth can the more objective structure clearly reflecting natural pipe, is convenient to student and more puts into practice close to Clinical anatomic.
Preferably, described transparent resin simulation root pipe selects commercially available overall length and the bending number of degrees standardized transparent resin simulation root pipe, and on the central axis of captured transparent resin simulation root pipe image at least interval be set with 8 gauge points.Like this, root pipe standards will be simulated and proportional spacing mark, be convenient to student's profound understanding root canal anatomy structure more.
Further, the central axis of captured transparent resin simulation root pipe image is divided into two sections, from root canal orifice to one section of bent intermediate section start by trisection, from bent intermediate section start to one of root canal point section by the quartern, each Along ent is 1 monumented point, adds up to interval to be set with 8 gauge points.Like this, skew situation before and after root canal preparation can be reflected with minimum and the most effective monumented point comprehensively, both be convenient to teacher and carried out assessing and instructing, and be also convenient to student and skillfully grasp.
Again further, the focus controlling that described digital camera focuses shooting is 20 ~ 40cm, preferably controls at 30cm.Like this, distance element picture rich in detail can be obtained, be convenient to observation and comparison.
Further, described image processing software selects Photoshop software and Image-Pro Plus software, described Photoshop software is used for the overlap ratio pair of image before and after root canal preparation, and described Image-ProPlus software is used for the range observation before and after root canal preparation between correspondence markings point.These two kinds of image processing software technology maturations, precisely efficiently can determine comparison data.
The present invention realizes root canal preparation effect detection device in dentistry teaching that said method designs, comprise base, described base is provided with protractor, the turning axle perpendicular to base is provided with in the center pit of described protractor, the lower end of described turning axle arranges the pointer matched with protractor, and the upper end of described turning axle is provided with the base station for fixing transparent resin dental cast or transparent resin simulation root pipe; Described base is also provided with camera support, and described camera support is provided with the digital camera for taking transparent resin dental cast or transparent resin simulation root pipe, the data output end of described digital camera is connected with the data input pin of computing machine.
Preferably, described camera support is relative to the vertical height of base station and all adjustable machinery mount of level interval.Like this, can adjust according to actual conditions the shooting spacing that root pipe simulated by digital camera and transparent resin dental cast or transparent resin in time, thus obtain image clearly.
Compared with practising with root canal preparation conventional in traditional oral medical teaching, advantage of the present invention is mainly reflected in following several respects:
One, transparent resin dental cast, particularly rebuilding the transparent resin dental cast of gained through actual teeth 3-D scanning can clear, the complication system that reflects natural pipe intuitively, makes student have more deep understanding for root canal anatomy.The transparent quality of transparent resin dental cast or transparent resin simulation root pipe makes student and teacher can find produced problem in root canal preparation intuitively, the position etc. that such as root blockage, shoulder formation and instrument fracture occur, also can intuitively reflect for problems such as the insufficient apical area dentine talus accumulations caused of flushing.
Its two, transparent resin dental cast or transparent resin simulation root pipe, by twice dyeing, can allow operator in real time, dynamically observe the effect of root canal preparation, are revised with not enough in Timeliness coverage root canal preparation.The effect of student's root canal preparation embodies with the form of form contrast and precise figures assessment by digitized measurement and evaluating system simultaneously, achieve the two-way assessment of combination of qualitative and quantitative analysis, thus quality that is truer, objective, that reflect student's root canal preparation all sidedly.
They are three years old, the effect image information of same student's different phase root canal preparation can be stored in computer by digitized measurement and evaluating system, student can contrast the effect of its forward/backward operation exercise, or compare using the data message before and after teacher's root canal preparation as evaluation criterion, thus be conducive to student oneself summing up experience, incremental, steadily improve the quality of root canal preparation.
Accompanying drawing explanation
Fig. 1 is the structural representation of root canal preparation effect detection device in the teaching of a kind of dentistry.
Fig. 2 is direct picture schematic diagram before the preparation of transparent resin dental cast.
Fig. 3 is deflection image schematic diagram before the preparation of transparent resin dental cast.
Fig. 4 is the preparation leading flank image schematic diagram of transparent resin dental cast.
Fig. 5 is direct picture schematic diagram after the preparation of transparent resin dental cast.
Fig. 6 is the preparation post deflection image schematic diagram of transparent resin dental cast.
Fig. 7 is the preparation trailing flank image schematic diagram of transparent resin dental cast.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
As shown in Figure 1, root canal preparation effect detection device in dentistry teaching of the present invention, comprise base 8, this base 8 is provided with protractor 7, the turning axle 6 perpendicular to base 8 is provided with in the center pit of protractor 7, the lower end of turning axle 6 arranges the pointer 9 matched with protractor 7, and the upper end of turning axle 6 is provided with the base station 5 for fixing transparent resin dental cast or transparent resin simulation root pipe 4; Base 8 is also provided with camera support 3, and camera support 3 is provided with the digital camera 2 for taking transparent resin dental cast or transparent resin simulation root pipe 4, the data output end of digital camera 2 is connected with the data input pin of computing machine 1.Wherein, camera support 3 is relative to the vertical height of base station 5 and all adjustable machinery mount of level interval.
Device of the present invention be realize by the following method dentistry teaching in root canal preparation effect detection:
Embodiment 1:
1) from the true Isolated Tooth that clinical collection is pulled out, here for maxillary first premolar, adopt the root canal system of the true Isolated Tooth of microscopic CT scanning, based on the original DICOM data of gained, macroscopic view and the bionical 3 D-printing stl file of microcosmic is obtained by Mimics software 3D processing, and stl file data are carried out Model Reconstruction, be committed to high precision 3D printer, use transparent resin material to make and obtain transparent resin dental cast.Transparent resin dental cast blue dyes before this root canal preparation is dyeed to its root canal system.
2) root canal system is dyed blue transparent resin dental cast to be fixed on the base station 5 of root canal preparation effect detection device in the teaching of dentistry shown in Fig. 1.
3) with the corona buccal surface of this transparent resin dental cast for horizontal frontal plane, the focal length of adjustment digital camera 2 is 30cm, the camera lens of digital camera 2 is focused shooting with the direction perpendicular to this horizontal frontal plane to transparent resin dental cast, now pointer 9 points to the number of degrees on protractor 7 is the position of 0 °, obtains the front direct picture A of preparation
0, as shown in Figure 2.
4) digital camera 2 camera lens unchanged direction is kept, base station 5 is rotated 45 ° and 90 ° counterclockwise respectively around turning axle 6, correspondingly, pointer 9 points to the position that the number of degrees on protractor 7 are respectively 45 ° and 90 °, and in the position of 45 ° and 90 °, shooting is focused to transparent resin dental cast, the focal length that digital camera 2 focuses shooting is still 30cm, obtains the front deflection image A of preparation respectively
45with preparation leading flank image A
90, as shown in Figure 3,4.
5) by direct picture A before gained preparation
0, preparation before deflection image A
45with preparation leading flank image A
90be stored in computing machine 1, root pipe outer wall profile M before the preparation utilizing Photoshop8.0 image processing software (Adobe company, the U.S.) to extract in each image
1, preparation before root tube hub axis L
1, and before preparation root tube hub axis L
1upper interval sets gauge point a before multiple preparation
1, a
2... a
n, still as shown in figs. 2 to 4.Based on measuring requirement accurately, root tube hub axis L before preparation
1on at least should determine 8 gauge points, i.e. a in interval
n>=8.
6) the complete transparent resin dental cast of shooting is taken off, root pipe mechanical preparation is carried out by clinical procedure, root pipe mechanical preparation standard type is: from root canal orifice to apical foramen of tooth direction be tapering reduce gradually cylindric, smooth continuously, without skew, without step, without boring a hole.
7) standard flush liquid is adopted to clean the transparent resin dental cast after root pipe mechanical preparation.
8) drying is carried out to the complete transparent resin dental cast of cleaning, then with orchil, its root canal system is dyeed.
9) root canal system is dyed red transparent resin dental cast to retighten on the base station 5 of root canal preparation effect detection device in the teaching of dentistry shown in Fig. 1.
10) above-mentioned steps 3 is repeated) and the operation of step 4), obtain preparation direct picture BB afterwards
0, preparation post deflection image BB
45with preparation trailing flank image BB
90, as shown in Fig. 5 ~ 7.
11) by direct picture BB after gained preparation
0, preparation post deflection image BB
45with preparation trailing flank image BB
90be stored in computing machine 1, root pipe outer wall profile M after the preparation utilizing Photoshop8.0 image processing software (Adobe company, the U.S.) to extract in each image
2, preparation after root tube hub axis L
2, and after preparation root tube hub axis L
2upper interval sets and gauge point a before described multiple preparation
1, a
2... a
ngauge point b after the multiple preparation one to one of position
1, b
2... b
n, still as shown in Fig. 5 ~ 7.
12) recycle Photoshop8.0 image processing software and will prepare front direct picture A
0with direct picture BB after preparation
0, preparation before deflection image A
45with preparation post deflection image BB
45, preparation leading flank image A
90with preparation trailing flank image BB
90carry out overlap ratio pair, determine the front root tube hub axis L of preparation on comparison chart picture
1with root tube hub axis L after preparation
2relative position.
13) Image-Pro Plus6.0 image processing software (Media Cybernetics company, the U.S.) is finally utilized to measure the front root tube hub axis L of preparation respectively
1on multiple preparations before gauge point a
1, a
2... a
nwith root tube hub axis L after preparation
2on gauge point b after multiple preparation one to one
1, b
2... b
nbetween distance, can the preparation effect of check and evaluation root pipe.
Embodiment 2:
1) select commercially available overall length and the bending number of degrees standardized transparent resin simulation root pipe 4, the transparent resin simulation root pipe 4 before this root canal preparation is dyeed to its root canal system with blue dyes.
2) root canal system is dyed blue transparent resin simulation root pipe 4 to be fixed on the base station 5 of root canal preparation effect detection device in the teaching of dentistry shown in Fig. 1.
3) with the central axis plane in complete display root canal curvature direction for horizontal frontal plane, the focal length of adjustment digital camera 2 is 30cm, the camera lens of digital camera 2 is focused shooting with the direction perpendicular to this horizontal frontal plane to transparent resin simulation root pipe 4, now pointer 9 points to the number of degrees on protractor 7 is the position of 0 °, obtains the front direct picture A of preparation
0, as shown in Figure 2.
4) digital camera 2 camera lens unchanged direction is kept, base station 5 is rotated 45 ° and 90 ° counterclockwise respectively around turning axle 6, correspondingly, pointer 9 points to the position that the number of degrees on protractor 7 are respectively 45 ° and 90 °, and in the position of 45 ° and 90 °, shooting is focused to transparent resin simulation root pipe 4, the focal length that digital camera 2 focuses shooting is still 30cm, obtains the front deflection image A of preparation respectively
45with preparation leading flank image A
90, as shown in Figure 3,4.
5) by direct picture A before gained preparation
0, preparation before deflection image A
45with preparation leading flank image A
90be stored in computing machine 1, root pipe outer wall profile M before the preparation utilizing Photoshop8.0 image processing software (Adobe company, the U.S.) to extract in each image
1, preparation before root tube hub axis L
1, and before preparation root tube hub axis L
1upper interval sets gauge point a before multiple preparation
1, a
2... a
n, still as shown in figs. 2 to 4.In the present embodiment, root tube hub axis L before preparing
1be divided into two sections, from root canal orifice to one section of bent intermediate section start by trisection, from bent intermediate section start to one of root canal point section by the quartern, each Along ent is 1 monumented point, adds up to interval to define 8 gauge points, i.e. a
n=8.
6) the transparent resin simulation root pipe 4 that shooting is complete is taken off, root pipe mechanical preparation is carried out by clinical procedure, root pipe mechanical preparation standard type is: from root canal orifice to apical foramen of tooth direction be tapering reduce gradually cylindric, smooth continuously, without skew, without step, without boring a hole.
7) standard flush liquid is adopted to clean the transparent resin simulation root pipe 4 after root pipe mechanical preparation.
8) complete to cleaning transparent resin simulation root pipe 4 carries out drying, then dyes to its root canal system with orchil.
9) root canal system is dyed red transparent resin simulation root pipe 4 to retighten on the base station 5 of root canal preparation effect detection device in the teaching of dentistry shown in Fig. 1.
10) above-mentioned steps 3 is repeated) and the operation of step 4), obtain preparation direct picture BB afterwards
0, preparation post deflection image BB
45with preparation trailing flank image BB
90, as shown in Fig. 5 ~ 7.
11) by direct picture BB after gained preparation
0, preparation post deflection image BB
45with preparation trailing flank image BB
90be stored in computing machine 1, root pipe outer wall profile M after the preparation utilizing Photoshop8.0 image processing software (Adobe company, the U.S.) to extract in each image
2, preparation after root tube hub axis L
2, and after preparation root tube hub axis L
2gauge point a before the setting of upper interval prepares with described 8
1, a
2... a
8gauge point b after 8 preparations one to one of position
1, b
2... b
8.
12) recycle Photoshop8.0 image processing software (Adobe company, the U.S.) and front direct picture A will be prepared
0with direct picture BB after preparation
0, preparation before deflection image A
45with preparation post deflection image BB
45, preparation leading flank image A
90with preparation trailing flank image BB
90carry out overlap ratio pair, determine the front root tube hub axis L of preparation on comparison chart picture
1with root tube hub axis L after preparation
2relative position.
13) Image-Pro Plus6.0 image processing software (Media Cybernetics company, the U.S.) is finally utilized to measure the front root tube hub axis L of preparation respectively
1on 8 preparation before gauge point a
1, a
2... a
8with root tube hub axis L after preparation
2on one to one 8 preparation after gauge point b
1, b
2... b
8between distance, can the preparation effect of check and evaluation root pipe.
Reflect according to the delta data of each gauge point longitudinal separation the apical transportation degree that root canal preparation produces, when being prepared to the root canal appliance of same No. number, data are less then represents that skew is fewer, and root canal preparation quality is better.Meanwhile, preparing in the root pipe image forward lapped, tip of a root position can also be observed emphatically whether the problems such as chain pulls open, step formation, ancon distortion occur.Also the alternative standardization standardization transparent resin simulation root pipe using different operating length, the bending number of degrees, crooked position, carrying out the root canal preparation of different complexity, by adjusting the determination to root pipe axis and survey mark point, can realize assessment.
Claims (9)
1. a root canal preparation effect detection method in dentistry teaching, is characterized in that: the method comprises the steps:
1) the transparent resin dental cast before root canal preparation or the effective blue dyes of transparent resin simulation root are dyeed to its root canal system;
2) root canal system being dyed that blue transparent resin dental cast or transparent resin simulation root pipe be fixed on can on the base station that rotates freely of level;
3) for transparent resin dental cast, with its corona buccal surface for horizontal frontal plane; For transparent resin simulation root pipe, with the central axis plane in complete display root canal curvature direction for horizontal frontal plane; Digital camera lens is focused shooting with the direction perpendicular to this horizontal frontal plane to transparent resin dental cast or transparent resin simulation root pipe, obtains the front direct picture (A of preparation
0);
4) keep digital camera lens unchanged direction, base station is rotated 45 ° and 90 ° respectively along same sense of rotation, and in the position of 45 ° and 90 °, shooting is focused to transparent resin dental cast or transparent resin simulation root pipe, obtain the front deflection image (A of preparation respectively
45) and preparation leading flank image (A
90);
5) by direct picture (A before gained preparation
0), preparation before deflection image (A
45) and preparation leading flank image (A
90) be stored in computing machine, root pipe outer wall profile (M before the preparation utilizing image processing software to extract in each image
1), preparation before root tube hub axis (L
1), and before preparation root tube hub axis (L
1) upper interval sets gauge point (a before multiple preparation
1, a
2... a
n);
6) take off the complete transparent resin dental cast of shooting or transparent resin simulation root pipe, carry out root pipe mechanical preparation by clinical procedure;
7) washing fluid is adopted to clean the transparent resin dental cast after root pipe mechanical preparation or transparent resin simulation root pipe;
8) drying is carried out to the complete transparent resin dental cast of cleaning or transparent resin simulation root pipe, then with orchil, its root canal system is dyeed;
9) root canal system being dyed red transparent resin dental cast or transparent resin simulation root pipe retightens can on the base station that rotates freely of level;
10) above-mentioned steps 3 is repeated) and the operation of step 4), obtain preparation direct picture (BB afterwards
0), preparation post deflection image (BB
45) and preparation trailing flank image (BB
90);
11) by direct picture (BB after gained preparation
0), preparation post deflection image (BB
45) and preparation trailing flank image (BB
90) be stored in computing machine, root pipe outer wall profile (M after the preparation utilizing image processing software to extract in each image
2), preparation after root tube hub axis (L
2), and after preparation root tube hub axis (L
2) gauge point (a before the setting of upper interval and described multiple preparation
1, a
2... a
n) gauge point (b after the multiple preparation one to one of position
1, b
2... b
n);
12) recycle image processing software and will prepare front direct picture (A
0) direct picture (BB rear with preparation
0), preparation before deflection image (A
45) and preparation post deflection image (BB
45), preparation leading flank image (A
90) and preparation trailing flank image (BB
90) carry out overlap ratio pair, determine the front root tube hub axis (L of preparation on comparison chart picture
1) root tube hub axis (L rear with preparation
2) relative position;
13) image processing software is finally utilized to measure the front root tube hub axis (L of preparation respectively
1) on multiple preparations before gauge point (a
1, a
2... a
n) root tube hub axis (L rear with preparation
2) on gauge point (b after multiple preparation one to one
1, b
2... b
n) between distance, can the preparation effect of check and evaluation root pipe.
2. root canal preparation effect detection method in dentistry teaching according to claim 1, it is characterized in that: described transparent resin dental cast is the root canal system based on the true Isolated Tooth of microscopic CT scanning, based on the original DICOM data of gained, macroscopic view and the bionical 3 D-printing stl file of microcosmic is obtained by Mimics software 3D processing, and stl file data are carried out Model Reconstruction, be committed to high precision 3D printer, use transparent resin material to be made.
3. root canal preparation effect detection method in dentistry teaching according to claim 1, it is characterized in that: described transparent resin simulation root pipe selects commercially available overall length and the bending number of degrees standardized transparent resin simulation root pipe, and on the central axis of captured transparent resin simulation root pipe image at least interval define 8 gauge points.
4. root canal preparation effect detection method in dentistry teaching according to claim 3, it is characterized in that: the central axis of captured transparent resin simulation root pipe image is divided into two sections, from root canal orifice to one section of bent intermediate section start by trisection, from bent intermediate section start to one of root canal point section by the quartern, each Along ent is 1 monumented point, adds up to interval to define 8 gauge points.
5. root canal preparation effect detection method in the dentistry teaching according to any one of Claims 1 to 4, is characterized in that: the focal length that described digital camera focuses shooting is 20 ~ 40cm.
6. root canal preparation effect detection method in dentistry teaching according to claim 5, is characterized in that: the focal length that described digital camera focuses shooting is 30cm.
7. root canal preparation effect detection method in the dentistry teaching according to any one of Claims 1 to 4, it is characterized in that: described image processing software selects Photoshop software and Image-Pro Plus software, described Photoshop software is used for the overlap ratio pair of image before and after root canal preparation, and described Image-ProPlus software is used for the range observation before and after root canal preparation between correspondence markings point.
8. one kind for realizing root canal preparation effect detection device in dentistry teaching that method described in claim 1 designs, comprise base (8), it is characterized in that: described base (8) is provided with protractor (7), the turning axle (6) perpendicular to base (8) is provided with in the center pit of described protractor (7), the lower end of described turning axle (6) arranges the pointer (9) matched with protractor (7), and the upper end of described turning axle (6) is provided with the base station (5) for fixing transparent resin dental cast or transparent resin simulation root pipe (4); Described base (8) is also provided with camera support (3), described camera support (3) is provided with the digital camera (2) for taking transparent resin dental cast or transparent resin simulation root pipe (4), the data output end of described digital camera (2) is connected with the data input pin of computing machine (1).
9. root canal preparation effect detection device in dentistry teaching according to claim 8, is characterized in that: described camera support (3) is relative to base station (5) vertical height and all adjustable machinery mount of level interval.
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