Kumar Naresh
Dr. Naresh Kumar, PhD, Assistant Professor, Science of Dental Materials Department, Institute of Dentistry, Liaquat University of Medical & Health Sciences, Jamshoro, Pakistan.
Pak J Med Sci. 2013 Jan;29(1):205-10. doi: 10.12669/pjms.291.2922.
The aims of this paper were to review the current strength testing methods of the dental resin-based composites (RBCs) and to explore the inconsistencies with regard to strength testing among researchers. Data selection/extraction: An outline of the most relevant aspects of RBCs was created, and a subsequent literature search for articles published during last four decades (1970-2010) was conducted using the databases, namely PubMed, Science Direct and ISI Web of Knowledge.
The literature review highlighted a lack of consensus among researchers regarding the reliability of ISO recommended three-point flexure strength testing method. Several investigators have used Weibull statistics for the analysis of RBCs strength data, however their applicability might be questioned as many RBCs contain greater resin content and may exhibit sufficient viscous deformation prior to brittle failure. In addition, variability in the selection of cross-head speed and mould material for strength testing was evident which may lead to variation in the strength data and render the interpretation difficult among researchers.
本文旨在回顾当前牙科树脂基复合材料（RBCs）的强度测试方法，并探讨研究人员在强度测试方面存在的不一致之处。数据选择/提取：创建了RBCs最相关方面的概述，并随后使用PubMed、ScienceDirect和ISI Web of Knowledge数据库对过去四十年（1970 - 2010年）发表的文章进行了文献检索。
文献综述突出了研究人员在ISO推荐的三点弯曲强度测试方法的可靠性方面缺乏共识。一些研究人员使用威布尔统计分析RBCs强度数据，然而其适用性可能受到质疑，因为许多RBCs含有较高的树脂含量，并且在脆性破坏之前可能表现出足够的粘性变形。此外，强度测试中十字头速度和模具材料选择的变异性很明显，这可能导致强度数据的变化，并使研究人员之间的解释变得困难。
