牙本质对牙釉质力学性能的影响  

The Influence of Dentin on Enamel Stress

作　　者：曾洋洋[1] 徐官宝 

机构地区：[1]西南交通大学机械工程学院摩擦学研究所,四川成都610031

出　　处：《机械》2016年第9期45-48,共4页Machinery

摘　　要：主要研究目的是考察牙本质层对牙釉质的相关力学性能的影响。采用压痕法测试原始试样和去除牙本质试样的断裂韧性,然后利用有限元分析法模拟牙釉质中裂纹的扩展过程,从而能对比分析试样裂纹扩展的动态过程。结果表明,去除牙本质之后牙釉质的断裂韧性明显降低;在相同的载荷下原始试样模型裂纹扩展的长度和时间都比去除牙本质试样模型的短。The purpose of the study is investigating the influence of dentin on enamel stress. Testing fracture toughness of samples by indentation and then to use the finite element analysis method to simulate the crack extension process of enamel, so not only static state but also dynamic crack propagation can be observed. Results indicate that the enamel of fracture toughness is decreased obviously without dentin and the length of primary sample crack propagation is shorter than sample without dentin.

关 键 词：人牙釉质 断裂韧性 裂纹扩展 

分 类 号：Q983.8[生物学—人类学]