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Synthesis of a novel functional monomer and development of an adhesive system appropriate to laser-irradiated dental tissues

新型功能单体的合成和适合激光照射牙科组织的粘合系统的开发

基本信息

批准号：
17390517
负责人：
SUZUKI Kazuomi
金额：
$ 10.49万
依托单位：
Okayama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

项目摘要

Introduction: The use of Er:YAG laser for catty preparations during treatment of dental caries has received attention because there is no unpleasantness of noise and vibration as with air turbine and micromotor, and there is no need of anesthesia for treatment. However, we found that conventional dental adhesive systems do not perform sufficiently well on Er:YAG laser irradiated dental surfaces, and moreover, one of its reasons is the weakness of dental surfaces after laser irradiation. So, due to its importance and clinical significance, we aimed to clarify the dental structure after Er:YAG laser irradiation and its quality as an adhesive surface, along with the development of a new adhesive system appropriate to this surface.Materials and Methods: 1) Adhesive surfaces preparation: Er:YAG laser (Erwin, Morita Co.) was irradiated with 127mJ, 10pps for 2 sec for enamel and with 69mJ, 10pps for 2 sec for dentin. 2) The primers of the adhesive systems were prepared with triazine-, aminoac … More id-, and epoxy-methacrylate/HEMA and alcohol. 3) The adhesive surfaces above were treated with each type of primer, phosphoric acid esther bonding agent and filled with composite resin (Clearfil APX, Kuraray Co.), then immersed in water at 37□for 24 hours before bond strength measurements.Results and Discussion: The bond strength of epoxy type primer system to Er:YAG laser irradiated dental adhesive surfaces was 18.6MPa for enamel (control: Megabond/Kuraray Co.; 12MPa), and 17.2MPa for dentin (control: 9MPa). The authors say that these results may be due to oxygen that exists in the space created by microcracks that occurred during laser irradiation of dental adhesive surfaces. As conventional dental adhesives, used in the control group, are of radical polymerization type, the polymerization reaction decrease remarkably in the presence of oxygen. On the other hand, the ring opening polymerization type resin tested in this study may be not much influenced by the presence of oxygen during reaction. Less

简介：由于Er：YAG激光不像空气涡轮机和微电机那样产生令人不快的噪声和振动，而且治疗时不需要麻醉，因此在龋齿治疗中用于大剂量制剂受到关注。然而，我们发现，传统的牙科粘合剂系统并没有表现出足够好的Er：YAG激光照射后的牙齿表面，而且，其原因之一是牙齿表面的弱点后，激光照射。因此，由于其重要性和临床意义，我们旨在阐明Er：YAG激光照射后的牙齿结构及其作为粘接表面的质量，沿着开发适合于该表面的新粘接系统。材料和方法：1）粘接表面制备：Er：YAG激光（Erwin，Morita Co.）牙釉质用127 mJ，10 pps照射2秒，牙本质用69 mJ，10 pps照射2秒。2)以三嗪基、氨基甲酸酯为原料， ...更多信息 id-和环氧-甲基丙烯酸酯/HEMA和醇。3)用每种类型的底漆、磷酸酯粘合剂处理上述粘合剂表面，并用复合树脂（Clearfil APX，Kuraray Co.）填充，结果和讨论：环氧型底漆系统对Er：YAG激光照射的牙粘接表面的粘接强度为18.6MPa（对照：Megabond/Kuraray Co.;牙本质组织为17.2MPa（对照组：9 MPa）。作者说，这些结果可能是由于激光照射牙科粘合剂表面期间发生的微裂纹所产生的空间中存在的氧气。由于在对照组中使用的常规牙科粘合剂是自由基聚合型的，因此在氧气存在下聚合反应显著降低。另一方面，在本研究中测试的开环聚合型树脂在反应期间可能不太受氧的存在的影响。少