Evaluation of Bond Strength of Two Different Bioactive Resin Cements versus Conventional Resin Cement to Lithium Silicate Ceramic and Tooth Enamel – An in Vitro Study –

Abstract

he bioactive resin cements showed a great success by stimulating mineral apatite formation and natural remineralization process at the material-tooth interface and by filling microgaps and sealing margins against microleakage. Therefore we wanted to evaluate the difference in bonding strength of the bioactive resin cements rather than the conventional ones. Clinicians face a lot of challenges regarding the bond strength, therefore this study was conducted focusing on evaluation of bond strength of two different bioactive resin cements; Activa bioactive resin cement and Theracem bioactive resin cement, versus conventional resin cement G-cem to lithium silicate ceramics and tooth enamel. Specimens were divided into two main groups according to the surface; enamel group and IPS e.max group. Then each main group was divided into three subgroups according to type of resin cement; Activa group, Theracem group and G-cem group. The samples of the extracted teeth were chosen according some criteria. The extracted teeth were sound and were not endodontically treated and were stored in water all the time. The samples were fixed on acrylic blocks then cut with Isomet. Also the samples of e.max blocks were cut using Isomet , then crystallization process was done. After that they were put into acrylic blocks. Application of the three