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目前,正畸托槽系统在口腔环境中的腐蚀情况尚未引起人们的足够重视。本文对9种网状基底新托槽和送往三家公司重新处理后的两种旧托槽(304型和316L型),分别置入人造唾液中进行检验观察,并作出评价。材料与方法将9家公司生产的前牙托槽用甲基丙烯酸甲酯固定在三块有机玻璃上,先用一个小显微镜对准托槽基底与有机玻璃之间一个宽100μm的裂隙区进行滑动观察,然后用丙烯酸粘结剂填塞此裂隙区。将托槽标本分别放入盛有人造唾液的小玻璃瓶内,温度保持在37℃,然后使用双筒显微镜分别在第1,3,7,42,84天和144天进行检查。首先观察腐蚀开始的时间,随后记录腐蚀的特征和进程。每周更换人造唾液。将经三家公司处理过的30个旧托槽(316L型和304型)先固定在五块有机玻璃上,然后置入盛有人造唾液的小玻璃瓶内观察320天。
At present, the orthodontic bracket system in the oral environment, the corrosion situation has not yet caused enough attention. In this paper, 9 kinds of mesh base new bracket and sent to the three companies after the reprocessing of the two old brackets (Type 304 and Type 316L), respectively, into artificial saliva for inspection inspection, and make an assessment. MATERIALS AND METHODS The frontal brackets produced by nine companies were fixed on three pieces of plexiglass with a small microscope, and a small microscope was used to align the cracked area between the bracket base and the plexiglass with a width of 100μm. Observe and then fill the fracture zone with an acrylic adhesive. The brackets were individually placed in vials containing artificial saliva and kept at 37 ° C, and then examined using a binocular microscope on days 1, 3, 7, 42, 84 and 144, respectively. First observe the beginning of the corrosion, and then record the characteristics and processes of corrosion. Change artificial saliva weekly. Thirty old brackets (Type 316L and Type 304), which had been processed by three companies, were first secured on five pieces of organic glass and then placed in a glass vial containing artificial saliva for 320 days.