Success of indirect restorations highly depends on the adhesive cement used. In the last couple of decades resin cement has evolved greatly and is preferred over other cements. It is important to understand the chemical composition and their interaction with teeth and the restoration in order to improvise and overcome the disadvantages. Here three groups were prepared, RelyX U200 dual-cure resin cement as control group or group 1and 10 vol% nanozirconia and 10 vol% nanodiamond modified cement as group 2 and group 3, respectively. 3-(Trimethoxysilyl) propyl methacrylate was the coupling agent used. Na-noparticles were added to coupling agent and mixed well on a glass slab, this was then mixed with the base of the commercial resin cement to obtain a homogenous mixture. Upon setting, the samples were crushed in mortar using pestle and made fine powder and incubated at 37⁰C and 100% humidity for 24 hours followed by SEM-EDS (SEM-EDS, Quanta FEG 450 USM) analysis. For FTIR analysis the powder form was made into the KBr pellet in a 1:10 ratio using samples and potassium bromide. The pellet was further analysed for chemical composition.

Self-adhesive dual-cure resin cements (DCRC) simplified clinical application to a single-step procedure. Studies reported inferior mechanical properties compared to conventional resin cements. This study evaluated and compared the compressive strength (CS) and flexural strength (FS) of commercial DCRC against its modification using 10 vol% nanozirconia and 10 vol% nanodiamond. Three groups were prepared: Group 1 (commercial resin cement), Group 2 (nanozirconia-modified), and Group 3 (nanodiamond-modified), with 10 samples per group. 3-(Trimethoxysilyl) propyl methacrylate was used as coupling agent. Specimens were prepared according to manufacturer instructions and tested for CS and FS using a Universal Instron testing machine. Data was analysed using one-way ANOVA and Tukey’s post hoc test. Compressive strength values were Group 2 = 132.18 ± 27.93 MPa, Group 3 = 126.21 ± 12.54 MPa, Group 1 = 121.12 ± 19.35 MPa. Flexural strength values were Group 2 = 72.5 ± 10.4 MPa, Group 3 = 71.06 ± 6.3 MPa, Group 1 = 66.92 ± 5.27 MPa. Both nanozirconia and nanodiamond incorporation showed improvements in CS and FS compared to the control group. Within the limitations of this study, nanozirconia modified dual cure resin cement showed higher values compared to nanodiamond modified dual cure resin. These results support further research to optimize nanofiller-reinforced luting cements.