Parra Gatica Elizabeth, Duran Ojeda Gerardo, Wendler Michael
Master Program in Dental Sciences, Faculty of Dentistry, Universidad de Concepción, Concepción, Chile.
Facultad de Ciencias de la Salud, Universidad Arturo Prat, Iquique, Chile.
Biomater Investig Dent. 2023 Feb 22;10(1):8-19. doi: 10.1080/26415275.2023.2175685. eCollection 2023.
Flowable bulk-fill resin-based composites (BF-RBCs) represent a new and interesting alternative for the bulk-fill restorative techniques in the posterior region. However, they comprise a heterogeneous group of materials, with important differences in composition and design. Therefore, the aim of the present systematic review was to compare the main properties of flowable BF-RBCs, including their composition, degree of monomer conversion (DC), polymerization shrinkage and shrinkage stress, as well as flexural strength. The search was conducted following PRISMA guidelines in the Medline (PubMed), Scopus and Web of Science databases. articles reporting on the DC, polymerization shrinkage/shrinkage stress, and flexural strength of flowable BF-RBCs strength were included. The QUIN risk-of-bias (RoB) tool was used for assessing the study quality. From initially 684 found articles, 53 were included. Values for DC ranged between 19.41 and 93.71%, whereas polymerization shrinkage varied between 1.26 and 10.45%. Polymerization shrinkage stresses reported by most studies ranged between 2 and 3 MPa. Flexural strength was above 80 MPa for most materials. A moderate RoB was observed in most studies. Flowable BF-RBCs meet the requirements to be indicated for bulk fill restoration technique in the posterior region. However, important variations among composition and properties hinder extrapolation of the results to materials different from those reported here. Clinical studies are urgently required to assess their performance under a real working scenario.
可流动的大块充填树脂基复合材料（BF-RBCs）是后牙区大块充填修复技术的一种新的、有趣的替代材料。然而，它们是一组异质材料，在组成和设计上存在重要差异。因此，本系统评价的目的是比较可流动BF-RBCs的主要性能，包括其组成、单体转化率（DC）、聚合收缩和收缩应力以及弯曲强度。检索按照PRISMA指南在Medline（PubMed）、Scopus和Web of Science数据库中进行。纳入了报道可流动BF-RBCs强度的DC、聚合收缩/收缩应力和弯曲强度的文章。使用QUIN偏倚风险（RoB）工具评估研究质量。从最初找到的684篇文章中，纳入了53篇。DC值在19.41%至93.71%之间，而聚合收缩在1.26%至10.45%之间变化。大多数研究报道的聚合收缩应力在2至3兆帕之间。大多数材料的弯曲强度高于80兆帕。大多数研究中观察到中等程度的RoB。可流动BF-RBCs符合后牙区大块充填修复技术的应用要求。然而，组成和性能之间的重要差异阻碍了将结果外推至与本文报道不同的材料。迫切需要进行临床研究以评估它们在实际工作场景下的性能。
