新型纳米含氟树脂中氟水平对其机械性能的影响

发布时间：2017-12-28 04:20

本文关键词：新型纳米含氟树脂中氟水平对其机械性能的影响　出处：《吉林大学学报(医学版)》2015年02期 　论文类型：期刊论文

【摘要】：目的:研究含氟量对新型纳米树脂的挠曲强度、弹性模量和微拉伸粘结强度(μTBS)等机械性能的影响。方法:选取Z350和4种含氟量不同(质量分数为0%、10%、20%和30%)的新型纳米树脂,将5种树脂制作成规格为(25.0±2.0)mm×(2.0±0.1)mm×(2.0±0.1)mm的挠曲强度试验标准试件,每组5个,万能测试机三点弯曲法测试挠曲强度和弹性模量。取25颗人第三磨牙,随机分到各组,每组5颗。制备成截面为(1.0±0.2)mm2的条柱状试件,每组10个,使用微拉伸测试仪测试件的μTBS,低倍镜观察粘结面断裂方式。结果:挠曲试验,各组试件挠曲强度比较差异无统计学意义(P0.05);含氟量20%组试件弹性模量明显大于其他各组(P0.05)。微拉伸试验,与含氟量0%组比较,含氟量10%和含氟量20%组试件μTBS差异无统计学意义(P0.05);含氟量30%组试件μTBS明显小于含氟量0%、10%和20%组(P0.05);与Z350组比较,含氟量0%和10%组试件μTBS差异无统计学意义(P0.05);含氟量20%和30%组试件μTBS明显小于Z350组(P0.05)。所有试件均为粘结面断裂。结论:树脂中含氟量不超过20%时,其对μTBS无影响;含氟量超过20%时,μTBS明显降低。
[Abstract]:Objective: To study the effect of fluorine content on the flexural strength, modulus of elasticity and microtensile bond strength (TBS) of the new nanoscale resin. Methods: Z350 and 4 kinds of different fluorine content (mass fraction of 0%, 10%, 20% and 30%) of new nano resin, 5 resin made specifications for (25 + 2) * mm (2 + 0.1) * mm (2 + 0.1) Standard Test of flexural strength of MM specimens. 5 in each group, universal testing machine by three point bending test of flexural strength and elastic modulus. 25 people third molars were randomly divided into each group, each group was 5. A column shaped specimen with a cross section of (1 + 0.2) mm2, 10 of each group, was tested by a micro tensile tester, and the fracture mode of the adhesive surface was observed by a low magnification mirror. Results: the flexural strength of the specimens in each group was not statistically significant (P0.05), and the modulus of elasticity of the 20% groups containing fluorine content was significantly greater than that of the other groups (P0.05). The micro tensile test, compared with the fluorine content of 0% groups, the fluorine content of 10% and the fluorine content of 20% groups of specimens TBS showed no significant difference (P0.05); the fluorine content of 30% specimens of group TBS was significantly less than the fluorine content of 0%, 10% and 20% groups (P0.05); compared with group Z350, including fluorine content 0% and 10% groups of specimens with TBS difference was statistically significant (P0.05); the fluorine content of 20% and 30% specimens of group TBS were significantly less than group Z350 (P0.05). All of the specimens are bonded surface fracture. Conclusion: when the content of fluorine in the resin is not more than 20%, it has no effect on the TBS, and when the content of fluorine is more than 20%, the mu TBS is obviously reduced.
【作者单位】：吉林大学口腔医院牙体牙髓病科;山东省邹城市人民医院口腔科;
【基金】：吉林省科技厅科技发展计划项目资助课题(20140414010GH)
【分类号】：R783.1
【正文快照】： 自20世纪60年代起复合树脂应用于龋病治疗,并以其操作简单、颜色美观和较好的机械性能等特点被广泛应用于临床。但由于材料自身的缺陷,继发龋仍是龋病充填治疗失败的主要原因之一[1-2]。因此,多年来学者一直致力于研究开发新型的复合树脂。氟抗龋机制已经明确,有研究[3-5]表明

【参考文献】