doiSerbia

Strain determination of self-adhesive resin cement using 3D digital image correlation method

Mitrović Aleksandra D. (Faculty of Mechanical Engineering, Belgrade)
Tanasić Ivan V. (School of Dentistry, Belgrade)
Mitrović Nenad R. (Faculty of Mechanical Engineering, Belgrade)
Milošević Miloš S. (Faculty of Mechanical Engineering, Innovation Center, Belgrade)
Tihaček-Šojić Ljiljana Đ. (School of Dentistry, Belgrade)
Antonović Dušan G. (Faculty of Technology and Metallurgy, Belgrade)

Introduction/Objective. In an attempt to simplify dental procedures, a new group of resin cements, self-adhesive resin cements (SARCs), have been introduced. Performance of SARCs can widely vary. One of the main reasons of adhesion failure is polymerization shrinkage. The aim of this study was to determine, evaluate, and measure strain field of self-adhesive dual cure resin cement during polymerization in self-cure mode using 3D digital image correlation (DIC) method. Methods. The self-adhesive Maxcem Elite (Kerr, Orange, CA, USA) cement was tested in five cylindrical samples (5 mm in diameter and 2 mm in thickness) prepared by filling plastic ring-type molds. Digital images were recorded immediately after sample preparation. Results. Non-uniform strain distribution was found in resin cement with higher strain values along the periphery (up to 15%) and lower strain values in central parts (around 4%) of each sample. Conclusion. It can be concluded that DIC is a powerful tool for full-field strain measurements in material characterization.

Keywords: self-adhesive cement, digital Image Correlation, strain, polymerization shrinkage, self-cure mode

Project of the Serbian Ministry of Education, Science and Technological Development, Grant no.TR35031 and Grant no. TR35040