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首页> 外文会议>International Conerence on Technologies and Materials for Renewable Energy, Environment and Sustainability >Etching of Enamel by Laser Energy for Direct Bonding of Orthodontic Appliance and Evaluation of Shear Bond Strength
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Etching of Enamel by Laser Energy for Direct Bonding of Orthodontic Appliance and Evaluation of Shear Bond Strength

机译：激光能量蚀刻牙釉质，用于直接粘接正畸器具和剪切粘合强度的评价

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In recent years, there has been growing interest in the laser applications for different dental maladies. Some of the applications of laser irradiation to etch dental enamel in preparation for direct bonding of orthodontic appliances have been studied and compared. Nonetheless, the etching effects of phosphoric acid and tow lasers radiations on the enamel of extracted human teeth had been compared in this study. 40 extracted human teeth were divided into 4 groups of 10 teeth each. Power settings on the laser etching unit were used. For first group: buccal surfaces were etched with an Er:yag laser (λ=2.9μ, W=2.5w), second group: buccal surfaces were etched with a Nd:yag laser (λ=0.532μ, average W=12w, V=25mm/sec), and third group : buccal surfaces were etched with a Nd:yag laser (λ=0.532μ, average W=12w, V=10mm/sec). While for forth group: buccal surfaces were subjected to a 30 sec acid etching (35%). After etching, modifications of the enamel surfaces were compared using two microscopes. Microscopically, the laser-ablated surfaces showed the formation of craters. These craters are higher in Er:yag laser. The acid-etched surfaces contained numerous microspaces, for the surface changes seen in the Nd:YAG laser-etched enamel result in a rough porous surface. But, some of the laser beam energy to thermal energy causes thermally-induced and Enyag laser with lower energy is more useful without side effects of thermal on dental tissues than Nd:yag. The summary means shear bond strengths of the buccal enamel surfaces etched by laser irradiation and by phosphoric acid, along with their standard deviations. It has been suggested that a minimum clinically acceptable bond strength. No significant differences were found between 2.5W laser irradiation and phosphoric-acid etching.
机译：近年来，对不同牙科疫苗的激光应用感兴趣。研究了激光辐射以蚀刻牙釉质的应用，以制备直接键合的正畸装置的直接粘合。尽管如此，在该研究中，比较了磷酸和磷酸和丝波激光辐射的蚀刻效果。在本研究中，已经进行了提取的人牙牙釉质辐射。将40粒子拔出分为4组10颗牙齿。使用激光蚀刻单元上的电源设置。对于第一组：用ER蚀刻颊表面：YAG激光（λ=2.9μ，W = 2.5W），用Nd：YAG激光蚀刻颊表面（λ=0.532μ，平均w = 12W。 v = 25mm / sec）和第三组：用Nd：YAG激光蚀刻颊表面（λ=0.532μ，平均w = 12w，v = 10mm / sec）。虽然第四组：颊表面受到30秒的酸蚀刻（35％）。在蚀刻后，使用两个显微镜进行比较牙釉质表面的修饰。显微镜地，激光烧蚀表面显示出陨石坑的形成。这些陨石坑在ER：YAG激光器中更高。酸蚀刻表面含有许多微型空间，用于在Nd：YAG激光蚀刻釉质中看到的表面变化导致粗糙的多孔表面。但是，一些激光束能量与热能导​​致具有较低能量的热诱导和enyAg激光更有用，而不会比ND：YAG在牙科组织上的热量施加副作用。概述是指通过激光照射和磷酸蚀刻的颊釉质表面的剪切键强度以及它们的标准偏差。已经提出了最低临床上可接受的粘合强度。在2.5w激光照射和磷酸蚀刻之间没有发现显着差异。

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