Static and dynamic mechanical behavior of microcapsule-reinforced dental composite. (June 2019)

• Record Type: Journal Article
• Authors: Sharma, Akhil; Alam, Sajid; Sharma, Chetan; Patnaik, Amar; Kumar, Shiv Ranjan
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 233:Number 6(2019)
• Page Start: 1184
• Page End: 1190
• Publication Date: 2019-06
• Subjects: Dental composite -- microcapsules -- static mechanical properties -- dynamic mechanical analysis -- Cole–Cole plot; Materials -- Periodicals; Engineering design -- Periodicals; 620.11
• DOI: 10.1177/1464420717733770
• Languages: English
• ISSNs: 1464-4207

Abstract

Resin-based dental composites were prepared by the addition of four different weight percentages (0–9 wt% microcapsules) of silane-treated microcapsules. The resin matrix was prepared by adding 50 wt% BisGMA, 48 wt% triethylene glycol dimethylacrylate, 0.4 wt% camphorquinone, and 1.6 wt% 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 (δ) as a function of temperature were evaluated systematically as per specific standards. The mechanical results indicated that the addition of 3 wt% of microcapsules increased both the hardness and flexural strength by 38% and 6%, respectively. On the other hand, addition of 3 wt% 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 6 wt% and increased on further increase of microcapsules up to 9 wt%. Finally, Cole–Cole plot has been drawn for identification of the nature of the proposed dental composites.