Comparison of photo-activation versus chemical or dual-curing of resin-based luting cements regarding flexural strength, modulus and surface hardness
Comparison of photo-activation versus chemical or dual-curing of resin-based luting cements regarding flexural strength, modulus and surface hardness
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DOI：
10.1046/j.1365-2842.2001.00809.x
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发表时间：
2001-11-01
影响因子：
2.9
通讯作者：
Klaiber, B
中科院分区：
文献类型：
--
作者：
Hofmann, N;Papsthart, G;Klaiber, B
本研究探讨了与光固化和双固化相比，双固化树脂基胶合剂的化学活化效率。固化通过（i）混合碱和催化剂而不随后照射来进行（化学固化= CC），（ii）混合碱和催化剂，直接照射（双固化= DC）或（iii）通过2.5 mm白榴石增强玻璃陶瓷进行辐照（IPS Empress，Ivoclar）（双固化通过瓷= DCtP），（iv）仅使用具有直接照射（光固化= LC）或具有（v）通过瓷的照射（通过瓷的光固化= LCtP）的基础糊剂。制备四种精细混合DC树脂复合材料和一种自固化混合树脂复合材料（仅CC）的试样，并在24小时后测试挠曲强度、弹性模量（ISO 4049）和表面硬度（维氏硬度）。对于所有的材料和参数，双固化比LC产生更高的值，即使是通过瓷进行照射。在没有光活化的自固化之后，弯曲强度为通过直接照射的双重固化获得的相应值的68.9- 85.9%，模量为59.2-94.5%，并且维氏硬度为86.1-101.4%。与直接照射相比，通过瓷的光固化降低了大多数参数和材料的值。相比之下，双固化保持了一种材料的弯曲强度，三种材料的模量和一种材料的硬度。自固化树脂水泥的力学性能介于DC材料之间。
This study investigated the efficiency of chemical activation of dual-cure resin-based luting cements as compared with light- and dual-curing. Curing was performed by (i) mixing base and catalyst without subsequent irradiation (chemical curing = CC), (ii) mixing base and catalyst with direct irradiation (dual-cure = DC) or with (iii) irradiation through 2.5 mm of leucite-reinforced glass-ceramics (IPS Empress, Ivoclar) (dual-cure through porcelain = DCtP), (iv) using only the base paste with direct irradiation (light-curing = LC) or with (v) irradiation through porcelain (fight-curing through porcelain = LCtP). Specimens of four fine-hybrid DC resin composites and one self-cure hybrid resin composite (only CC) were prepared and tested after 24 h for flexural strength, modulus of elasticity (ISO 4049) and surface hardness (Vickers). For all materials and parameters, dual-curing produced higher values than LC, even when irradiation was performed through porcelain. Following self-curing without photo-activation, flexural strength was 68.9-85.9%, the modulus 59.2-94.5% and Vickers hardness 86.1-101.4% of the corresponding values obtained by dual-curing with direct irradiation. Light-curing through porcelain as compared with direct irradiation reduced the values for most parameters and materials. In contrast, dual-curing maintained flexural strength for an, the modulus for three and the hardness for one of the materials. The mechanical properties of the self-curing resin cement ranged between those of the DC materials.