Braga Roberto R, Ballester Rafael Y, Ferracane Jack L
Department of Dental Materials, School of Dentistry, University of São Paulo, Av. Prof. Lineu Prestes, 2227, São Paulo, SP 05508-900, Brazil.
Dent Mater. 2005 Oct;21(10):962-70. doi: 10.1016/j.dental.2005.04.018.
Polymerization shrinkage stress of resin-composite materials may have a negative impact on the clinical performance of bonded restorations. The purpose of this systematic review is to discuss the primary factors involved with polymerization shrinkage stress development.
According to the current literature, polymerization stress of resin composites is determined by their volumetric shrinkage, viscoelastic behavior and by restrictions imposed to polymerization shrinkage. Therefore, the material's composition, its degree of conversion and reaction kinetics become aspects of interest, together with the confinement and compliance of the cavity preparation.
Information provided in this review was based on original scientific research published in Dental, Chemistry and Biomaterials journals. Textbooks on Chemistry and Dental Materials were also referenced for basic concepts.
Shrinkage stress development must be considered a multi-factorial phenomenon. Therefore, accessing the specific contribution of volumetric shrinkage, viscoelastic behavior, reaction kinetics and local conditions on stress magnitude seems impractical. Some of the restorative techniques aiming at stress reduction have limited applicability, because their efficiency varies depending upon the materials employed. Due to an intense research activity over the years, the understanding of this matter has increased remarkably, leading to the development of new restorative techniques and materials that may help minimize this problem.
树脂复合材料的聚合收缩应力可能会对粘结修复体的临床性能产生负面影响。本系统评价的目的是探讨与聚合收缩应力产生相关的主要因素。
根据当前文献，树脂复合材料的聚合应力由其体积收缩、粘弹性行为以及对聚合收缩的限制所决定。因此，材料的组成、转化率和反应动力学以及窝洞预备的约束性和顺应性都成为了研究的关注点。
本综述提供的信息基于发表在牙科、化学和生物材料期刊上的原创科学研究。化学和牙科材料方面的教科书也被引用以获取基本概念。
收缩应力的产生必须被视为一种多因素现象。因此，要确定体积收缩、粘弹性行为、反应动力学和局部条件对应力大小的具体贡献似乎是不切实际的。一些旨在降低应力的修复技术适用性有限，因为它们的效率因所使用的材料而异。经过多年的深入研究，对这一问题的理解有了显著提高，从而推动了新的修复技术和材料的发展，这些可能有助于将这个问题最小化。
