Static and dynamic mechanical behavior of microcapsule-reinforced dental composite

摘要

Resin-based dental composites were prepared by the addition of four different weight percentages (0-9wt% microcapsules) of silane-treated microcapsules. The resin matrix was prepared by adding 50wt% BisGMA, 48wt% triethylene glycol dimethylacrylate, 0.4wt% camphorquinone, and 1.6wt% ethyl 4 dimethyl amino benzoate, respectively. In this study, the static mechanical properties in terms of micro-hardness, compressive strength, flexural strength, and dynamic mechanical analysis, in terms of storage modulus (E), loss modulus (E), and Tan delta () as a function of temperature were evaluated systematically as per specific standards. The mechanical results indicated that the addition of 3wt% of microcapsules increased both the hardness and flexural strength by 38% and 6%, respectively. On the other hand, addition of 3wt% of microcapsules on the same resin based dental composite decreased the compressive strength by 35%. The dynamic mechanical results indicated that the storage modulus, loss modulus and glass transition temperatures was initially decreased with the addition of micro-capsules from 0 to 6wt% and increased on further increase of microcapsules up to 9wt%. Finally, Cole-Cole plot has been drawn for identification of the nature of the proposed dental composites.