Comparative study regarding the chemical corrosion of different types of composite resins in artificial saliva

• Main Authors: Irina Nica, Gianina Iovan, Angela Ghiorghe, Simona Stoleriu, Galina Pancu, Sorin Andrian
• Format: Article
• Language: English
• Published: Romanian Society of Oral Rehabilitation 2016-01-01
• Series: Romanian Journal of Oral Rehabilitation
• Subjects: artificial saliva; chemical corrosion; composite resins
• Online Access: http://www.rjor.ro/comparative-study-regarding-the-chemical-corrosion-of-different-types-of-composite-resins-in-artificial-saliva/?lang=ro
• ISSN: 2066-7000; 2601-4661

The aim of the study was to investigate the chemical corrosion in artificial saliva of some commercial composite resins. Material and method. 20 samples of a nanocomposite resin (Filtek Supreme XT, 3M ESPE) and 20 samples of a microhybrid composite resin (Filek Z250, 3M ESPE) were immersed for 30 days in Fusayama artificial saliva. After that, they were examined by scanning electron microscopy and energydispersive X-ray spectroscopy. Results. It resulted that the corrosion is mainly due to the pitting, micrometric holes being observed for both materials. Also, preferred directions of corrosion resulted, as consequence of micro-scratches formation during the samples preparation. The oxygen content generally increased due to the oxides formation, while carbon, silicon and zirconium normalized atomic percents decreased. Conclusions. The corrosion of the composite resins in artificial saliva is mainly represented by pitting, and micrometric holes. The chemical corrosion affected both polymeric matrix and filler particles.