CN104299500B - 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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- 238000002360 preparation method Methods 0.000 title claims abstract description 221
- 210000004262 dental pulp cavity Anatomy 0.000 title claims abstract description 111
- 230000000694 effects Effects 0.000 title claims abstract description 40
- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 239000011347 resin Substances 0.000 claims abstract description 96
- 229920005989 resin Polymers 0.000 claims abstract description 96
- 238000004088 simulation Methods 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000001045 blue dye Substances 0.000 claims abstract description 5
- 239000000975 dye Substances 0.000 claims description 7
- 238000011156 evaluation Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- 239000012467 final product Substances 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 238000007639 printing Methods 0.000 claims description 3
- 238000002591 computed tomography Methods 0.000 claims description 2
- 235000013399 edible fruits Nutrition 0.000 claims 1
- 239000003814 drug Substances 0.000 abstract 1
- 239000001044 red dye Substances 0.000 abstract 1
- 210000004268 dentin Anatomy 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 3
- 239000004218 Orcein Substances 0.000 description 2
- 208000024216 Periapical disease Diseases 0.000 description 2
- 208000019786 dental pulp disease Diseases 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 210000000214 mouth Anatomy 0.000 description 2
- 235000019248 orcein Nutrition 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
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 208000002599 Smear Layer Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000000338 in vitro Methods 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
- 239000003550 marker Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000010603 microCT Methods 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 210000004053 periapical tissue Anatomy 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
- 210000004233 talus Anatomy 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- 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
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Abstract
The invention discloses a root canal preparation effect detection method and a root canal preparation effect detection device in oral medicine teaching. The method is that a transparent resin tooth model or a transparent resin simulation root canal before and after root canal preparation is dyed by blue dye and red dye respectively and then digital fixed-focus shooting is carried out; extracting the outer wall outline of the root canal before and after preparation and the central axis of the root canal before and after preparation in the shot image by adopting 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, overlapping and comparing the corresponding images, and determining the relative positions of the corresponding mark points on the compared images to detect and evaluate the preparation effect of the root canal. The device mainly comprises a protractor arranged on a base, a rotating shaft arranged in a central hole of the protractor, a base station arranged at the upper end of the rotating shaft and used for fixing a transparent resin tooth model or a transparent resin simulation root canal, and a digital camera connected with a computer. The invention is convenient for students and teachers to intuitively evaluate the change of the shape before and after root canal preparation.
Description
Technical field
The invention belongs to dentistry teaching field, in particular to root canal preparation in a kind of dentistry teaching
Effect detection method and device thereof.
Background technology
Dental pulp disease and periapical disease are inflammatory diseases common, that caused by various extraneous factors in oral cavity.
Root canal therapy is that it has passed through currently for the maximally effective a kind of therapeutic modality of dental pulp disease and periapical disease
Kind root canal preparation is to reach thoroughly to remove inflammatory and the purpose of downright bad material in pulp cavity and periapical tissue.
Therefore, the success or not of root canal therapy is heavily dependent on the quality of root canal preparation.Root canal preparation
Including mechanical preparation and root canal irrigation, high-quality root canal preparation should be pre-by the machinery of root canal appliance
Standby with chemical flush thoroughly, the basic detritus removed on root canal wall and smear layer.First, the machine of root pipe
Tool preparation is to comply with the uniform cutting tube in root pipe direction by the root canal file of various stainless steels or NiTi material
Wall, if root canal curvature, tiny or irregular, then can produce deviation in preliminary procedure root pipe is former and walk to cut open
Direction, causes that dentine inside root canal curvature is too cut and curved outside dentine preparation puts in place,
Or pull open at the tip of a root 1/3rd region generation step, perforation, tip of a root chain, or tip of a root skew
Etc. problem.Furthermore, owing to the anatomic form of root pipe is the most irregular, conventional root canal appliance can not be with root
Pipe interior everywhere dentine connects and contacts.There are some researches show, the area of about 61% cannot be prepared device
Tool contacts, and therefore cannot be removed the part dentine of infection completely by the method for mechanical preparation, and abundant
Chemical flush highly important supplementary function is played for the cleaning of root pipe after mechanical preparation.
At present, MED entering before clinical practice stage, generally use collect from clinic pull out from
Body tooth carries out the exercise of root canal preparation.Tooth physiologically 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 carries out the operation study of root canal preparation, can know from experience the labyrinth of root pipe more vividly, reduce
Gap between practice and the other operation of clinical chair, strengthens the confidence of the patient that in the future sees and treat patients.
But, the dentine of natural teeth is opaque material, and the effect of students' root canal preparation cannot be straight
Connect and observe, be unfavorable for that students feed back the operating effect of self, be also unfavorable for Teacher Evaluation student's achievement.
For the problems referred to above, have scholar by through mechanical preparation with rinse after tooth rive assessment root canal preparation
Effect, but this method cannot by mechanical preparation and rinse after effect enter with root pipe original state before
Row compares.In order to solve the problems referred to above, separately have scholar first will preparation before root pipe cross-section be three cross sections,
After reversal film record cross section root canal morphology, recover the continuity of root pipe and prepare and rinse, so
After again by three items, again with reversal film record cross section root canal morphology, and with root pipe before
Compare, thus the effect of root canal preparation is estimated.But this method is disadvantageous in that:
Either longitudinal the most cross-section sectioning of riving, all can only reflect the local form of root pipe, and for root pipe
Overall condition cannot accurate assurance.Therefore, all can not assess well with both the above Isolated Tooth model
Member's root canal preparation and the effect of flushing.
It is also worth noting that in the past teacher to the evaluation of student's root canal preparation quality only by visually observing
And micro-judgment, it is impossible to avoid causing because of judgment criteria different between vision deviation and different teacher
Error, thus it is difficult to ensure that accuracy and the objectivity that each student is prepared the assessment of root pipe.
Therefore, how to keep the original complicated root canal system structure of tooth, overcome dentine opacity institute
The obstacle brought, so that student can be most possibly close to the root canal preparation that clinical chair is other in practice
Experience, can objective, accurately reflect the change of form before and after root canal preparation, in order to Jiao Shijin simultaneously
Row assessment and guidance, for the problem of these two aspects, there is not yet corresponding teaching mode the most both at home and abroad
And solution.
Summary of the invention
Present invention aim to provide in a kind of dentistry teaching root canal preparation effect detection method and
Its device, for the detection of teaching process middle school student's root canal preparation effect, with visual image and concrete data
The form combined accurately reflects the change of form before and after root canal preparation, it is simple to student and teacher comment intuitively
Estimate the change of form before and after root canal preparation.
For achieving the above object, root canal preparation effect detection side in the dentistry teaching designed by the present invention
Method, comprises the steps:
1) the transparent resin dental cast before root canal preparation or transparent resin are simulated the effective blue dyes of root to it
Root canal system dyes；
2) root canal system is dyed the transparent resin dental cast of blueness or transparent resin simulation root pipe, and be fixed on can
On the base station that level rotates freely；
3) for transparent resin dental cast, with its corona buccal surface as horizontal frontal plane；Root is simulated for transparent resin
With complete, pipe, shows that the central axis plane in root canal curvature direction is as horizontal frontal plane；By digital camera lens with vertically
In the direction of this horizontal frontal plane, transparent resin dental cast or transparent resin are simulated root pipe and focus shooting, obtain
Front direct picture must be prepared；
4) keep digital camera lens unchanged direction, by base station along same direction of rotation rotate respectively 45 ° and
90 °, and carry out determining to transparent resin dental cast or transparent resin simulation root pipe the position of 45 ° and 90 °
Burnt shooting, obtains deflection image and preparation leading flank image before preparation respectively；
5) deflection image before direct picture, preparation before gained preparation and preparation leading flank image are stored in meter
In calculation machine, image processing software is utilized to extract root pipe outer wall profile, the front root of preparation before the preparation in each image
Tube hub axis, and mark point before the multiple preparations of interval setting on root tube hub axis before preparation；
6) take off the complete transparent resin dental cast of shooting or transparent resin simulation root pipe, enter by clinical procedure
Row root pipe mechanical preparation；
7) use flushing liquor that the transparent resin dental cast after root pipe mechanical preparation or transparent resin are simulated root pipe
It is carried out；
8) the complete transparent resin dental cast of cleaning or transparent resin simulation root pipe are dried, then with red
Its root canal system is dyeed by look dyestuff；
9) transparent resin dental cast or transparent resin simulation root pipe that root canal system is dyed redness retighten
Can be on the base station that rotates freely of level；
10) repeat the above steps 3) and the operation of step 4), it is thus achieved that after preparation after direct picture, preparation
Deflection image and preparation trailing flank image；
11) direct picture, preparation post deflection image and preparation trailing flank image after gained preparation are stored in
In computer, image processing software is utilized to extract after the preparation in each image after root pipe outer wall profile, preparation
Root tube hub axis, and on root tube hub axis, interval sets and marks before the plurality of preparation after preparation
Point is marked after the point the most multiple preparation in position；
12) recycling image processing software is by before direct picture, preparation after front for preparation direct picture and preparation
Deflection image carries out overlap ratio with preparation post deflection image, preparation leading flank image with preparation trailing flank image
Right, determine the relative position of root tube hub axis after preparing front root tube hub axis on comparison chart picture and preparing；
13) image processing software is finally utilized to measure the multiple preparations on the front root tube hub axis of preparation respectively
After front mark point and preparation on root tube hub axis after the most multiple preparations between mark point away from
From, get final product the preparation effect of check and evaluation root pipe.
Preferably, described transparent resin dental cast is based on the true Isolated Tooth of microscopic CT scanning
Root canal system, based on gained original DICOM data, is obtained by Mimics software three-dimensional process
Macroscopical and that microcosmic is bionical 3 D-printing stl file, and stl file data are carried out Model Reconstruction, carries
Hand over to high accuracy 3D printer, use transparent resin material to be made.So, simulation is true in vitro
Tooth can the most objective structure clearly reflecting natural pipe, it is simple to student is more nearly Clinical anatomic
Practice.
Preferably, described transparent resin simulation root pipe selects commercially available overall length and bending number of degrees mark
The transparent resin simulation root pipe of standardization, and on the central axis of captured transparent resin simulation root pipe image
At least interval is set with 8 mark points.So, root pipe standards proportional spacing mark will be simulated, just
Construct in student's more profound understanding root canal anatomy.
Further, the central axis of captured transparent resin simulation root pipe image is divided into two sections, from root pipe
Mouthful to a section of bent intermediate section start by trisection, from one section of quilt of bent intermediate section start to root canal point
The quartering, each Along ent is 1 index point, adds up to interval to be set with 8 mark points.So,
The skew situation before and after root canal preparation can be reflected with minimum and maximally effective index point comprehensively, both be easy to religion
Teacher is estimated and instructs, and also allows for student and skillfully grasps.
Yet further, it is 20～40cm that described digital camera focuses the focus controlling of shooting, preferably controls
At 30cm.As such, it is possible to obtain distance element picture rich in detail, it is simple to observe and compare.
Further, described image processing software selects Photoshop software and Image-Pro Plus soft
Part, described Photoshop software is the overlap ratio pair of image, described Image-Pro before and after root canal preparation
The range measurement between correspondence markings point before and after the root canal preparation of Plus software.Both image procossing are soft
Part technology maturation, it is possible to precisely efficiently determine comparison data.
The present invention is to realize root canal preparation effect detection dress in the dentistry teaching that said method designs
Put, including base, described base is provided with protractor, is provided with vertical in the centre bore of described protractor
Directly in the rotary shaft of base, the lower end of described rotary shaft arranges the pointer matched with protractor, described rotation
The upper end of rotating shaft is provided with for fixing transparent resin dental cast or the base station of transparent resin simulation root pipe；Institute
State and on base, be additionally provided with camera support, described camera support is provided with for shooting transparent resin tooth mould
Type or the digital camera of transparent resin simulation root pipe, the data output end of described digital camera and computer
Data input pin connects.
Preferably, described camera support is the most adjustable relative to the vertical height of base station and level interval
The machinery mount of joint.As such, it is possible to adjust digital camera and transparent resin tooth mould in time according to actual conditions
Type or the shooting spacing of transparent resin simulation root pipe, thus obtain image clearly.
Compared with root canal preparation exercise conventional in traditional oral medical teaching, the main body of advantages of the present invention
Following several respects:
One, transparent resin dental cast, particularly through actual teeth 3-D scanning rebuild gained transparent tree
Fat dental cast energy is clear, reflect the complication system of natural pipe intuitively so that student is for root pipe solution
Cut open more deep understanding.The transparent quality of transparent resin dental cast or transparent resin simulation root pipe makes to learn
Member and teacher can find produced problem in root canal preparation intuitively, such as root blockage, shoulder formed and
The position etc. that instrument fracture occurs, asks for rinsing insufficient apical area dentine talus accumulation etc. caused
Topic also can intuitively reflect.
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, with the deficiency in discovery root canal preparation in time also
Revised.Digitized measurement and assessment system by the effect of student's root canal preparation simultaneously with form contrast and
The form of precise figures assessment embodies, it is achieved that the two-way assessment of combination of qualitative and quantitative analysis, thus trueer
Real, objective, reflect the quality of student's root canal preparation all sidedly.
Its three, digitized measurement and assessment system can be by the effect of same student's different phase root canal preparation
Image information is stored in computer, and student can contrast the effect of its forward/backward operation exercise, or with teacher
Data message before and after root canal preparation compares as evaluation criterion, thus beneficially student oneself sums 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 be transparent resin dental cast preparation before direct picture schematic diagram.
Fig. 3 be transparent resin dental cast preparation before deflection image schematic diagram.
Fig. 4 is the preparation leading flank image schematic diagram of transparent resin dental cast.
Fig. 5 be transparent resin dental cast preparation after direct picture schematic diagram.
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.
Detailed description of the invention
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings:
As it is shown in figure 1, root canal preparation effect detection device in the dentistry teaching of the present invention, the end of including
Seat 8, this base 8 is provided with protractor 7, is provided perpendicular to base 8 in the centre bore of protractor 7
Rotary shaft 6, the lower end of rotary shaft 6 arranges the pointer 9 matched with protractor 7, rotary shaft 6 upper
End is provided with for fixing transparent resin dental cast or the base station 5 of transparent resin simulation root pipe 4；Base 8
On be additionally provided with camera support 3, camera support 3 is provided with for shooting transparent resin dental cast or transparent
The digital camera 2 of resin simulation root pipe 4, the data output end of digital camera 2 is defeated with the data of computer 1
Enter end to connect.Wherein, camera support 3 is the most adjustable relative to the vertical height of base station 5 and level interval
Machinery mount.
Assembly of the invention is to be realized by the following method examining root canal preparation effect in dentistry is imparted knowledge to students
Survey:
Embodiment 1:
1) collect the true Isolated Tooth pulled out from clinic, herein above as a example by jaw frist premolar, use aobvious
The root canal system of the true Isolated Tooth of micro-CT scan, based on gained original DICOM data, passes through
Mimics software three-dimensional process obtains macroscopic view and the bionical 3 D-printing stl file of microcosmic, and by STL
File data carries out Model Reconstruction, is committed to high accuracy 3D printer, uses transparent resin material to be made to
To transparent resin dental cast.By the transparent resin dental cast blue dyes before this root canal preparation to its root
Guard system dyes.
2) the transparent resin dental cast that root canal system is dyed blueness is fixed on the teaching of dentistry shown in Fig. 1
On the base station 5 of middle root canal preparation effect detection device.
3) with the corona buccal surface of this transparent resin dental cast as horizontal frontal plane, the focal length adjusting digital camera 2 is
30cm, is carried out the camera lens of digital camera 2 transparent resin dental cast with the direction being perpendicular to this horizontal frontal plane
Focusing shooting, now pointer 9 points to the number of degrees on protractor 7 is the position of 0 °, it is thus achieved that front elevation before preparation
As A0, as shown in Figure 2.
4) keep digital camera 2 camera lens unchanged direction, base station 5 is rotated counterclockwise respectively around rotary shaft 6
45 ° and 90 °, correspondingly, pointer 9 points to the number of degrees on protractor 7 and is respectively 45 ° and the position of 90 °
Putting, and the position of 45 ° and 90 °, transparent resin dental cast is focused shooting, digital camera 2 is fixed
The focal length of burnt shooting is still 30cm, obtains deflection image A before preparation respectively45With preparation leading flank image A90,
As shown in Figure 3,4.
5) by direct picture A before gained preparation0, preparation before deflection image A45With preparation leading flank image A90Deposit
It is stored in computer 1, utilizes Photoshop8.0 image processing software (Adobe company, the U.S.) to extract
Root pipe outer wall profile M before preparation in each image1, preparation before root tube hub axis L1, and root before preparation
Tube hub axis L1Upper interval sets mark point a before multiple preparations1、a2、……aN, the most as shown in figs. 2 to 4.
Based on measuring requirement accurately, root tube hub axis L before preparation1On at least should be spaced and determine 8 marks
Point, i.e. aN≥8。
6) take off the transparent resin dental cast that shooting is complete, carry out root pipe mechanical preparation, root by clinical procedure
Pipe mechanical preparation standard type is: from root canal orifice to apical foramen of tooth direction be tapering be gradually reduced cylindric,
The most smooth, without skew, without step, without perforation etc..
7) use standard flush liquid that the transparent resin dental cast after root pipe mechanical preparation is carried out.
8) the complete transparent resin dental cast of cleaning is dried, then with orchil to its root canal system
Dye.
9) the transparent resin dental cast that root canal system is dyed redness retightens in dentistry shown in Fig. 1
In teaching on the base station 5 of root canal preparation effect detection device.
10) repeat the above steps 3) and the operation of step 4), it is thus achieved that direct picture BB after preparation0, preparation
Post deflection image BB45With preparation trailing flank image BB90, as shown in Fig. 5～7.
11) by direct picture BB after gained preparation0, preparation post deflection image BB45With preparation trailing flank image BB90
It is stored in computer 1, utilizes Photoshop8.0 image processing software (Adobe company, the U.S.) to carry
Take root pipe outer wall profile M after the preparation in each image2, root tube hub axis L after preparation2, and after preparation
Root tube hub axis L2Upper interval sets and marks some a before the plurality of preparation1、a2、……aNPosition is one by one
Mark point b after corresponding multiple preparations1、b2、……bN, still as shown in Fig. 5～7.
12) recycling Photoshop8.0 image processing software is by front for preparation direct picture A0With front after preparation
Image BB0, preparation before deflection image A45With preparation post deflection image BB45, preparation leading flank image A90With in advance
Standby trailing flank image BB90Carry out overlap ratio pair, determine the front root tube hub axis L of preparation on comparison chart picture1With in advance
Standby rear tube hub axis L2Relative position.
13) finally utilize Image-Pro Plus6.0 image processing software (Media Cybernetics company,
The U.S.) measure root tube hub axis L before preparation respectively1On multiple preparations before mark point an a1、a2、……aN
With root tube hub axis L after preparation2On a mark point b after the most multiple preparations1、b2、……bNBetween
Distance, can the preparation effect of check and evaluation root pipe.
Embodiment 2:
1) commercially available overall length and the bending number of degrees standardized transparent resin simulation root pipe 4 are selected, by this
Its root canal system is dyeed by transparent resin simulation root pipe 4 blue dyes before root canal preparation.
2) the transparent resin simulation root pipe 4 that root canal system is dyed blueness is fixed on dentistry shown in Fig. 1
In teaching on the base station 5 of root canal preparation effect detection device.
3) show that the central axis plane in root canal curvature direction, as horizontal frontal plane, adjusts Jiao of digital camera 2 with complete
Away from for 30cm, transparent resin is simulated root with the direction being perpendicular to this horizontal frontal plane by the camera lens of digital camera 2
Pipe 4 carries out focusing shooting, and now pointer 9 points to the number of degrees on protractor 7 is the position of 0 °, it is thus achieved that preparation
Front direct picture A0, as shown in Figure 2.
4) keep digital camera 2 camera lens unchanged direction, base station 5 is rotated counterclockwise respectively around rotary shaft 6
45 ° and 90 °, correspondingly, pointer 9 points to the number of degrees on protractor 7 and is respectively 45 ° and the position of 90 °
Put, and the position of 45 ° and 90 °, transparent resin simulation root pipe 4 is focused shooting, digital camera
2 focus the focal length of shooting still for 30cm, respectively deflection image A before acquisition preparation45With preparation leading flank image
A90, as shown in Figure 3,4.
5) by direct picture A before gained preparation0, preparation before deflection image A45With preparation leading flank image A90Deposit
It is stored in computer 1, utilizes Photoshop8.0 image processing software (Adobe company, the U.S.) to extract
Root pipe outer wall profile M before preparation in each image1, preparation before root tube hub axis L1, and root before preparation
Tube hub axis L1Upper interval sets mark point a before multiple preparations1、a2、……aN, the most as shown in figs. 2 to 4.
In the present embodiment, by front for preparation root tube hub axis L1It is divided into two sections, initiates from root canal orifice to bent intermediate
One section of place by trisection, from one section of bent intermediate section start to root canal point by the quartering, each decile
Point is 1 index point, and adding up to interval to determine has 8 marks points, i.e. aN=8。
6) take off the transparent resin simulation root pipe 4 that shooting is complete, carry out root pipe mechanical preparation by clinical procedure,
Root pipe mechanical preparation standard type is: from root canal orifice to apical foramen of tooth direction be tapering be gradually reduced cylindric,
The most smooth, without skew, without step, without perforation etc..
7) use standard flush liquid that the transparent resin after root pipe mechanical preparation is simulated root pipe 4 to be carried out.
8) the transparent resin simulation root pipe 4 that cleaning is complete is dried, then with orchil to its root pipe
System dyes.
9) the transparent resin simulation root pipe 4 that root canal system is dyed redness retightens in oral cavity shown in Fig. 1
In medical teaching on the base station 5 of root canal preparation effect detection device.
10) repeat the above steps 3) and the operation of step 4), it is thus achieved that direct picture BB after preparation0, preparation
Post deflection image BB45With preparation trailing flank image BB90, as shown in Fig. 5～7.
11) by direct picture BB after gained preparation0, preparation post deflection image BB45With preparation trailing flank image BB90
It is stored in computer 1, utilizes Photoshop8.0 image processing software (Adobe company, the U.S.) to carry
Take root pipe outer wall profile M after the preparation in each image2, root tube hub axis L after preparation2, and after preparation
Root tube hub axis L2Upper interval sets and described 8 preparations front mark point a1、a2、……a8Position is one by one
Mark point b after 8 corresponding preparations1、b2、……b8。
12) before recycling Photoshop8.0 image processing software (Adobe company, the U.S.) will be prepared just
Face image A0With direct picture BB after preparation0, preparation before deflection image A45With preparation post deflection image BB45, pre-
Standby leading flank image A90With preparation trailing flank image BB90Carry out overlap ratio pair, determine before preparing on comparison chart picture
Root tube hub axis L1With root tube hub axis L after preparation2Relative position.
13) finally utilize Image-Pro Plus6.0 image processing software (Media Cybernetics company,
The U.S.) measure root tube hub axis L before preparation respectively1On 8 preparation before mark point a1、a2、……a8With
Root tube hub axis L after preparation2On one to one 8 preparation after mark point a b1、b2、……b8Between
Distance, gets final product the preparation effect of check and evaluation root pipe.
It is inclined that delta data according to each mark point longitudinal separation reflects root pipe produced by root canal preparation
Shifting degree, when being prepared to the root canal appliance of same No. number, data are the least then represents that skew is the fewest, root pipe
Preparation quality is the best.Meanwhile, in the root pipe image that preparation forward laps, it is also possible to observe emphatically the tip of a root
The problems such as whether position occurs chain to pull open, step formation, ancon deformation.Also alternative use difference
Active length, the bending number of degrees, the standardization standardization transparent resin simulation root pipe of crooked position, carried out not
With the root canal preparation of complexity, by adjusting root pipe axis and the determination of surveying marker point,
Realize assessment.
Claims (9)
1. root canal preparation effect detection method in a dentistry teaching, it is characterised in that: the method bag
Include following steps:
1) the transparent resin dental cast before root canal preparation or transparent resin are simulated the effective blue dyes of root to it
Root canal system dyes；
2) root canal system is dyed the transparent resin dental cast of blueness or transparent resin simulation root pipe, and be fixed on can
On the base station that level rotates freely；
3) for transparent resin dental cast, with its corona buccal surface as horizontal frontal plane；Root is simulated for transparent resin
With complete, pipe, shows that the central axis plane in root canal curvature direction is as horizontal frontal plane；By digital camera lens with vertically
In the direction of this horizontal frontal plane, transparent resin dental cast or transparent resin are simulated root pipe and focus shooting, obtain
Front direct picture (A must be prepared0)；
4) keep digital camera lens unchanged direction, by base station along same direction of rotation rotate respectively 45 ° and
90 °, and carry out determining to transparent resin dental cast or transparent resin simulation root pipe the position of 45 ° and 90 °
Burnt shooting, obtains deflection image (A before preparation respectively45) and preparation leading flank image (A90)；
5) by direct picture (A before gained preparation0), preparation before deflection image (A45) and preparation on front side of
Face image (A90) be stored in computer, utilize image processing software to extract root before the preparation in each image
Pipe outer wall profile (M1), preparation before root tube hub axis (L1), and root tube hub axis before preparation
(L1) above it is spaced mark point (a before the multiple preparations of setting1、a2、……aN)；
6) take off the complete transparent resin dental cast of shooting or transparent resin simulation root pipe, enter by clinical procedure
Row root pipe mechanical preparation；
7) use flushing liquor that the transparent resin dental cast after root pipe mechanical preparation or transparent resin are simulated root pipe
It is carried out；
8) the complete transparent resin dental cast of cleaning or transparent resin simulation root pipe are dried, then with red
Its root canal system is dyeed by look dyestuff；
9) transparent resin dental cast or transparent resin simulation root pipe that root canal system is dyed redness retighten
Can be on the base station that rotates freely of level；
10) repeat the above steps 3) and step 4) operation, it is thus achieved that direct picture (B after preparation0)、
Preparation post deflection image (B45) and preparation trailing flank image (B90)；
11) by direct picture (B after gained preparation0), preparation post deflection image (B45) and preparation on rear side of
Face image (B90) be stored in computer, utilize image processing software to extract root after the preparation in each image
Pipe outer wall profile (M2), preparation after root tube hub axis (L2), and root tube hub axis after preparation
(L2) above it is spaced mark point (a before setting and the plurality of preparation1、a2、……aN) position one_to_one corresponding
Multiple preparations after mark point (b1、b2、……bN)；
12) recycling image processing software is by front for preparation direct picture (A0) with preparation after direct picture (B0)、
Deflection image (A before preparation45) and preparation post deflection image (B45), preparation leading flank image (A90)
With preparation trailing flank image (B90) carry out overlap ratio pair, determine the front root tube hub axle of preparation on comparison chart picture
Line (L1) with preparation after root tube hub axis (L2) relative position；
13) image processing software is finally utilized to measure root tube hub axis (L before preparation respectively1On) many
Point (a is marked before individual preparation1、a2、……aN) with preparation after root tube hub axis (L2) upper one_to_one corresponding
Multiple preparations after mark point (b1、b2、……bNDistance between), gets final product the pre-of check and evaluation root pipe
Standby effect.
Root canal preparation effect detection method in dentistry the most according to claim 1 teaching, it is special
Levy and be: described transparent resin dental cast is root canal system based on the true Isolated Tooth of microscopic CT scanning,
Based on gained original DICOM data, obtain macroscopic view and microcosmic by Mimics software three-dimensional process
Bionical 3 D-printing stl file, and stl file data are carried out Model Reconstruction, is committed to high accuracy
3D printer, uses transparent resin material to be made.
Root canal preparation effect detection method in dentistry the most according to claim 1 teaching, it is special
Levy and be: at least interval determines there are 8 on the central axis of captured transparent resin simulation root pipe image
Mark point.
Root canal preparation effect detection method in dentistry the most according to claim 3 teaching, it is special
Levy and be: captured transparent resin simulation root pipe image central axis be divided into two sections, from root canal orifice to
Between bend one section of section start by trisection, from one section of bent intermediate section start to root canal point by the quartering,
Each Along ent is 1 index point, and adding up to interval to determine has 8 mark points.
5. root canal preparation effect detection in imparting knowledge to students according to the dentistry according to any one of Claims 1 to 4
Method, it is characterised in that: it is 20～40cm that described digital camera focuses the focal length of shooting.
Root canal preparation effect detection method in dentistry the most according to claim 5 teaching, it is special
Levy and be: it is 30cm that described digital camera focuses the focal length of shooting.
7. root canal preparation effect detection in imparting knowledge to students according to the dentistry according to any one of Claims 1 to 4
Method, it is characterised in that: described image processing software selects Photoshop software and Image-Pro Plus
Software, described Photoshop software is the overlap ratio pair of image, described Image-Pro before and after root canal preparation
The range measurement between correspondence markings point before and after the root canal preparation of Plus software.
8. root canal preparation effect in the dentistry teaching that a kind is designed for realizing method described in claim 1
Fruit detection device, including base (8), it is characterised in that: described base is provided with protractor on (8)
(7), the rotary shaft (6) of base (8) in the centre bore of described protractor (7), it is provided perpendicular to,
The lower end of described rotary shaft (6) arranges the pointer (9) matched with protractor (7), described rotary shaft
(6) upper end is provided with for fixing transparent resin dental cast or the base of transparent resin simulation root pipe (4)
Platform (5)；Camera support (3) it is additionally provided with, on described camera support (3) on described base (8)
It is provided with for shooting transparent resin dental cast or the digital camera (2) of transparent resin simulation root pipe (4),
The data output end of described digital camera (2) is connected with the data input pin of computer (1).
Root canal preparation effect detection device in dentistry the most according to claim 8 teaching, it is special
Levy and be: described camera support (3) is for the most adjustable relative to base station (5) vertical height and level interval
The machinery mount of joint.
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| WO2019076330A1 (en) * | 2017-10-19 | 2019-04-25 | 上海交通大学医学院附属第九人民医院 | Digitized evaluation method and system for quality of in-vitro root canal preparation |
| CN109674543A (en) * | 2017-10-19 | 2019-04-26 | 上海交通大学医学院附属第九人民医院 | A kind of external root canal preparation quality digitlization appraisal procedure and system |
| CN107516461A (en) * | 2017-10-24 | 2017-12-26 | 刘乔 | A kind of dentistry lecture scope is as trainer |
| CN108614883A (en) * | 2018-05-02 | 2018-10-02 | 上海交通大学医学院附属第九人民医院 | A kind of the tooth database and its method for building up of canalis radicis dentis rating |
| CN109243275A (en) * | 2018-10-25 | 2019-01-18 | 南京工程学院 | A kind of motion control and power detection imitative experimental appliance for dental root canal treatment |
| CN111653168A (en) * | 2020-07-13 | 2020-09-11 | 北京达雅鼎医疗器械有限公司 | Root canal model and using method thereof |
| WO2023060545A1 (en) * | 2021-10-15 | 2023-04-20 | 韩方凯 | Tooth imaging teaching apparatus |
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