CN104057205A - Method for removing and shedding orthodontic bracket bottom plate adhesive by virtue of ultra-short pulse laser irradiation mode - Google Patents
Method for removing and shedding orthodontic bracket bottom plate adhesive by virtue of ultra-short pulse laser irradiation mode Download PDFInfo
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- CN104057205A CN104057205A CN201410270017.9A CN201410270017A CN104057205A CN 104057205 A CN104057205 A CN 104057205A CN 201410270017 A CN201410270017 A CN 201410270017A CN 104057205 A CN104057205 A CN 104057205A
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- orthodontic bracket
- pulse laser
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- binding agent
- short pulse
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
- B08B7/0042—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser
Abstract
The invention provides a method for removing and shedding orthodontic bracket bottom plate adhesive by virtue of an ultra-short pulse laser irradiation mode. In the method, an ultra-short pulse laser with visual indication light, a light beam energy reshaping system, a real-time monitoring system with a filtering wave unit and an orthodontic bracket fixture are used. By virtue of the light beam energy reshaping system, energy distribution of light beams output by the ultra-short pulse laser is transformed, more than 80% of energy is concentrated in a central round region accounting for a quarter of the total area of light spots; by virtue of cooperation of pulse frequency being greater than megahertz, a thermoelastic wave mechanism is initiated, so that the adhesive is changed into powder from solid so as to automatically shed from the surface an orthodontic bracket bottom plate. According to the method, the thermoelastic wave mechanism initiated by the high-frequency ultra-short pulse laser is utilized, so that the aesthetic property of the orthodontic bracket is basically not damaged, small black points are left only on a shallow layer on the surface of the orthodontic bracket bottom plate, but the aesthetic property of the orthodontic bracket bound with a tooth face is not influenced, so that the method has higher clinical application value and is simple and efficient.
Description
Technical field
The present invention relates to a kind of ultra-short pulse laser radiation mode and remove the method for the orthodontic bracket base plate binding agent that comes off.
Background technology
Orthodontic adherence technology is rescued technology very efficiently as one, can complete the orthodontic therapy to the wrong jaw situation of the various tooth of various complexity, therefore in orthodontic treatment, has a very wide range of applications.Orthodontic bracket is as the core in orthodontic adherence technology, in orthodontic treatment, often there is obscission, and affect a lot of because have that it comes off, for example, in the time of first bonding, the difference of patient's cooperate degree, the difference of oral environment all can make the probability that orthodontic bracket comes off rise.There are some researches show, in orthodontic therapy, the expulsion rate of orthodontic bracket can be up to 54.3% (" reasons of Brackets Lost in Fixed Appliance ". " Shanghai Journal of Stomatology " .2001,10 (3): 228-230. Pan Hui jade tablet).Single bracket is expensive, the good import bracket of quality just reaches one, units up to a hundred, and the bracket amount needing in clinical first bonding is generally at 20 to 30, therefore the bracket expense that patient pays just need not reach several thousand yuan of units even up to ten thousand not etc., therefore generally adopt clinically sand-blast or flame ablation method etc. to the orthodontic bracket coming off carry out remaining adhesive treatment (" ceramic bracket of different disposal method coheres shear strength comparison again ". " Chinese Practical oral section magazine " .2010, 3 (1): 24-26. woods skill Hui, Deng), realize its recycling, and effective relieve patient ' s burden, reduce the wasting of resources, thereby there is very strong clinical meaning.
Traditional way of recycling still can be removed remaining binding agent on metal orthodontic bracket, and can realize the recovery of metal orthodontic bracket, but the situation that exists damage or binding agent carbonization to pollute to base plate retention system, and ceramic orthodontic bracket is due to the hard fragility of its basic material and the requirement to aesthetic property after being disposed, therefore traditional processing way of recycling is often at one's wit's end.At present at home clinically,, often it is directly abandoned, and reuse brand-new bracket because of without effective remaining binding agent removal method for the ceramic orthodontic bracket coming off, caused the waste greatly of resource.Existing method can be carried out with PRK the removal of remaining binding agent to ceramic orthodontic bracket, realize its recovery, but after treatment, can there is colour-change phenomena in ceramic bracket, affect its aesthetic property, and need to process and could recover aesthetic property through long term annealing, thereby make this method become loaded down with trivial details, and do not possess the instantaneity requirement of clinical practice.So, adopt new method to remove the remaining binding agent of the ceramic orthodontic bracket that comes off, and retain its aesthetic property, to realize fast and reclaiming, society and economic implications are great.
When the high-frequency laser action of ultrashort pulse is during in body surface, because it produces thermoelastic stress to material heating extremely fast and cooling effect, and spread and come in object with the form of stress wave, carry out the removal of material in a kind of mechanics mode, form a kind of elastic heat wave mechanism, because its energy density is very low, this cleaning mechanism is often very little to the destruction of base material.Therefore by the shaping to ultra-short pulsed laser beam Energy distribution, make the Energy distribution in small size region, center far above periphery, and the orthodontic bracket that comes off is carried out to large area hot spot irradiation.The difference in energy and surface temperature due to central area and neighboring area, take central area as stress wave source, the instantaneous ripple of diffusion-induced stress towards periphery, cause elastic heat wave removal mechanisms at work, reach the object that moment shatters the remaining binding agent in orthodontic bracket surface, and substantially harmless to orthodontic bracket surface, be a kind of supper-fast binding agent removal method.
Summary of the invention
The object of the invention is to adopt ultrashort pulse laser to complete the removal of the remaining binding agent of orthodontic bracket base plate, realize the recycling of ceramic orthodontic bracket, and ensure the aesthetic property that it is originally bright, a kind of new and effective recycling technology is provided.
For achieving the above object, the invention provides a kind of ultrashort pulse laser scan mode and remove the method for the orthodontic bracket base plate binding agent that comes off, it is characterized in that, application is as lower device, comprise: there is ultrashort pulse laser 1, the beam energy orthopedic systems 2 of visible pilot light, the real-time monitoring system 3 with filter unit, orthodontic bracket fixture 4, and place according to Fig. 1 order.
The method comprises the following steps:
1) orthodontic bracket that comes off to be processed need is positioned in orthodontic bracket fixture, and by visible pilot light, the orthodontic bracket fixture assembling is placed in to the beam Propagation path of ultrashort pulse laser.
2) by adjusting the position between orthodontic bracket fixture and beam energy orthopedic systems, make pilot light can substantially cover orthodontic bracket backplate surface.Laser beam energy distribution can be converted by beam energy orthopedic systems, its more than 80% energy is all concentrated in the central circular of the hot spot gross area 1/4th, coordinate pulse frequency more than megahertz to cause elastic heat wave mechanism and binding agent is pulverized as Powdered by bulk.
3) power output of setting ultrashort pulse laser, irradiance pulse frequency, orthodontic bracket is carried out to irradiation in short-term, and by thering is the real-time monitoring system of filter unit, the various light waves that affect observation effect that produce in elimination process, thereby situation is removed in the pulverizing of the remaining binding agent of monitoring orthodontic bracket backplate surface, until binding agent is pulverized completely and stopped irradiation behind Automatic-falling bracket surface.In whole removal process, the power output of ultrashort pulse laser is 60W～70W, and the energy density going out at orthodontic bracket base plate is 0.85 μ J/cm
2～10 μ J/cm
2, pulse frequency is 1MHz～10MHz, exposure time is 5s～6s.
Compared with conventional binding agent removal method, the invention has the beneficial effects as follows:
1, whole removal process is effective fast, remove operation before with operation after all without any extra process;
2, owing to causing elastic heat wave removal mechanisms at work, the method can ensure ceramic orthodontic bracket base arrangement and aesthetic property not damaged thereof, only leaves stain on the bracket base shallow-layer surface of the facing that need to bond, but harmless its aesthetic property after boning;
3, on single bracket, the removal time of remaining binding agent is very rapid, only needs five to six seconds.
Brief description of the drawings:
Fig. 1 is device schematic diagram.
Fig. 2 be embodiment 1 come off orthodontic bracket base plate irradiation remove before and after, with the outward appearance comparison diagram of new bracket.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described:
The orthodontic bracket fixture 4 that is fixed with the orthodontic bracket that comes off is positioned in the irradiation light path of ultrashort pulse laser 1, adjusts the spacing of beam energy orthopedic systems 2 and orthodontic bracket fixture 4, make the hot spot of visible pilot light can substantially cover orthodontic bracket base plate;
According to the quantity of the remaining binding agent of orthodontic bracket, set power output and the pulse frequency of ultrashort pulse laser 1, then correction bracket base is carried out to short time irradiation.Laser beam is after 2 effects of beam energy orthopedic systems, Energy distribution changes, its more than 80% energy all concentrates in the central circular of the hot spot gross area 1/4th, coordinates pulse frequency more than megahertz, causes the elastic heat wave mechanism of binding agent and removes.Use has the real-time monitoring system 3 of filter unit, the various light waves that affect observation effect that produce in elimination process, thereby correction bracket base is carried out to real-time monitored monitoring, judge exposure time, in order to avoid exposure time is long, correction bracket base structure is caused to damage.After irradiation completes, binding agent from orthodontic bracket base plate, is reached the object of removal with Powdered automatic trip.
Embodiment 1:
3M Clarity pottery orthodontic bracket application ultra-short pulse laser radiation mode is removed to the remaining binding agent at base plate place.
(1) the 3M Clarity pottery orthodontic bracket coming off is fixed in orthodontic bracket fixture, is placed on afterwards in the irradiation transmission light path of ultrashort pulse laser.
(2) adjust the position between orthodontic bracket fixture and beam energy orthopedic systems according to visible pilot light, make visible pilot light can substantially cover bracket base.
(3) power output of setting ultrashort pulse laser is 70W, pulse frequency 1MHz then carries out irradiation removal to the remaining binding agent of correction bracket base, laser beam is under beam energy orthopedic systems, its more than 80% energy all concentrates in the central circular of the hot spot gross area 1/4th, causes the elastic heat wave mechanism of the remaining bonding in orthodontic bracket surface and removes.Observe orthodontic bracket base plate by real-time monitoring system, when remaining binding agent becomes Powdered automatic trip after backplate surface from bulk completely, stop irradiation, exposure time is 5s.The Laser output energy density of now setting is about 10 μ J/cm
2.Contrast scans 3M Clarity pottery orthodontic bracket and the brand-new bracket before and after removing, as shown in Figure 2, can see that the binding agent of the remnants of base plate place removes totally, and the ceramic bracket of irradiation after removing only leave pore at backplate surface shallow-layer, matrix color and luster is as good as with new bracket.Carry out after facing bonding aesthetic property and brand-new 3M Clarity pottery orthodontic bracket indifference.
Embodiment 2:
3M Clarity SL pottery self-ligating orthodontic bracket application ultra-short pulse laser radiation mode is removed to the remaining binding agent at base plate place.
(1) the 3M Clarity SL pottery self-ligating orthodontic bracket coming off is fixed in orthodontic bracket fixture, is placed on afterwards in the transmission light path of ultrashort pulse laser.
(2) size on bracket base according to visible pilot light, adjusts the position between orthodontic bracket fixture and beam energy orthopedic systems, makes visible pilot light can substantially cover bracket base.
(3) power output of setting ultrashort pulse laser is 60W, and pulse frequency 10MHz then starts the remaining binding agent of correction bracket base to carry out irradiation removal, and by real-time monitoring system observation, after irradiation 6s, remaining binding agent is removed completely.The Laser output energy density of now setting is about 0.85 μ J/cm
2.After irradiation is removed, binding agent is become Powdered from bulk, and automatic trip, from 3M Clarity SL pottery self-ligating orthodontic bracket backplate surface, only leaves stain at base plate shallow-layer on aesthetic property, carries out after facing bonding, and aesthetic property is as good as with new bracket.
Claims (1)
1. a ultra-short pulse laser radiation mode is removed the method for the orthodontic bracket base plate binding agent that comes off, it is characterized in that, application, as lower device, comprising: have ultrashort pulse laser (1), the beam energy orthopedic systems (2) of visible pilot light, the real-time monitoring system (3) with filter unit, orthodontic bracket fixture (4);
The method comprises the following steps:
1) orthodontic bracket that comes off to be processed need is positioned in orthodontic bracket fixture (4), and by visible pilot light, the orthodontic bracket fixture (4) assembling is placed in to the beam Propagation path of ultrashort pulse laser (1);
2) by adjusting the position between orthodontic bracket fixture (4) and beam energy orthopedic systems (2), make pilot light can substantially cover orthodontic bracket backplate surface; By beam energy orthopedic systems (2), Laser beam energy distribution is converted, its more than 80% energy all concentrates in the central circular of the hot spot gross area 1/4th, coordinate pulse frequency more than megahertz, it is Powdered causing elastic heat wave mechanism and binding agent is pulverized by bulk;
3) power output of setting ultrashort pulse laser (1), irradiance pulse frequency, orthodontic bracket is carried out to irradiation in short-term, and by thering is the real-time monitoring system (3) of filter unit, situation is removed in the pulverizing of the remaining binding agent of monitoring orthodontic bracket backplate surface, stops irradiation until binding agent is pulverized completely behind Automatic-falling bracket surface; In whole removal process, the power output of ultrashort pulse laser is 60W～70W, and the energy density going out at orthodontic bracket base plate is 0.85 μ J/cm
2～10 μ J/cm
2, pulse frequency is 1MHz～10MHz, exposure time is 5s～6s.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410270017.9A CN104057205A (en) | 2014-06-17 | 2014-06-17 | Method for removing and shedding orthodontic bracket bottom plate adhesive by virtue of ultra-short pulse laser irradiation mode |
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| CN201410270017.9A CN104057205A (en) | 2014-06-17 | 2014-06-17 | Method for removing and shedding orthodontic bracket bottom plate adhesive by virtue of ultra-short pulse laser irradiation mode |
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| CN104057205A true CN104057205A (en) | 2014-09-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110000163A (en) * | 2019-04-08 | 2019-07-12 | 王娟 | A kind of oral restoration correction auxiliary device |
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| CN102489882A (en) * | 2011-11-30 | 2012-06-13 | 深圳市木森科技有限公司 | Method, device and equipment for colloid removal with laser |
| CN102814590A (en) * | 2012-07-21 | 2012-12-12 | 北京工业大学 | Method for removing adhesive on bottom plate of orthodontic bracket by laser |
| CN103796611A (en) * | 2012-04-16 | 2014-05-14 | 崔正寿 | Orthodontic bracket and preparation method thereof |
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2014
- 2014-06-17 CN CN201410270017.9A patent/CN104057205A/en active Pending
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| JP2007152420A (en) * | 2005-12-08 | 2007-06-21 | Aisin Seiki Co Ltd | Method of removing film on substrate |
| CN102164461A (en) * | 2011-03-09 | 2011-08-24 | 深圳市大族激光科技股份有限公司 | Device and method for degumming in SMT (surface mounting technology) industry |
| CN102489882A (en) * | 2011-11-30 | 2012-06-13 | 深圳市木森科技有限公司 | Method, device and equipment for colloid removal with laser |
| CN103796611A (en) * | 2012-04-16 | 2014-05-14 | 崔正寿 | Orthodontic bracket and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110000163A (en) * | 2019-04-08 | 2019-07-12 | 王娟 | A kind of oral restoration correction auxiliary device |
| CN110000163B (en) * | 2019-04-08 | 2021-08-27 | 王娟 | Oral cavity repair corrects auxiliary device |
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Application publication date: 20140924 |