牙齿粘结强度测定中的新概念及有限元研究

A new concept and finite-element study on dental bond strength tests
2016-12-27 12:30发表评论
作者:Jin, X.-Z., Homaei, E., Matinlinna, J.P., Tsoi, J.K.H.
机构: 香港大学牙医学院牙齿材料学系
期刊: DENT MATER2016年10月10期32卷

Objective Numerous bond strength tests have been performed on dental adhesion experiments. Yet, the validity of these bond strength tests is controversial due to the name (e.g., “shear” or “tensile”) may not reflect to the true and complete stress situation, i.e., assumed uniform shear or uniaxial tensile conditions. Thus, the aim of this study was to simulate and compare the stress distribution of and between shear bond strength (SBS), tensile bond strength (TBS), mold-enclosed shear bond strength (ME-SBS) and de novo lever-induced mold-enclosed shear bond strength (LIME-SBS) tests. Methods 3-Dimensional finite element method (FEM) was used on the dental resin-bonded surfaces (i.e., titanium alloy, dentine and porcelain) interphased with adhesive layer (thickness 5 μm) to simulate the mechanical tests. For ME-SBS, both polycarbonate and stainless steel molds were used. For LIME-SBS, stainless steel levers and molds with lengths of 3 mm, 6 mm, 12 mm, 15 mm and 18 mm were used. The applied loads on these models were 50 N, 100 N and 200 N. Results De novo LIME-SBS test was the most optimal configuration to evaluate “shear” bond strength of adhesive in regards to providing significantly high and uniform shear stress as well as eliminating tensile stress at the interface. The conventional SBS test created very high tensile stress at the load area, whereas the TBS created optimal tensile stress but shear stress indeed co-exist. The ME-SBS test could also eliminate some of the tensile stress. Similar stress distributions pattern appeared on the Ti-adhesive models, the dentine-adhesive models and porcelain-adhesive models. Significance None of the bond strength tests could give purely “shear” or “tensile” bond strength, but LIME-SBS seems to be the best model to evaluate the bond strength under true “shear” mode. © 2016 The Academy of Dental Materials

通讯机构:Dental Materials Science, Faculty of Dentistry, The University of Hong Kong, Hong Kong Special Administrative Region, China
学科代码:口腔医学   关键词:牙齿粘结强度 ,中国作者重要发表 爱思唯尔医学网, Elseviermed
来源: Scopus
Scopus介绍:Scopus 于2004年11月正式推出,是目前全球规模最大的文摘和引文数据库。Scopus涵盖了由5000多家出版商出版发行的科技、医学和社会科学方面的18,000多种期刊,其中同行评审期刊16,500多种。相对于其他单一的文摘索引数据库而言,Scopus的内容更加全面,学科更加广泛,特别是在获取欧洲及亚太地区的文献方面,用户可检索出更多的文献数量。通过Scopus,用户可以检索到1823年以来的近4000万条摘要和题录信息,以及1996年以来所引用的参考文献。数据每日更新。 马上访问Scopus网站http://www.scopus.com/
顶一下(0
您可能感兴趣的文章
发表评论网友评论(0)
发表评论
登录后方可发表评论,点击此处登录