Clinical assessments
’s Q
Patients were called for controls after 1 week (baseline) and 6 and 12 months. The restorations were evaluated for the retention, marginal adaptation, marginal discoloration, surface texture, color match, and post-operative sensitivity according to the United States Public Health Service (USPHS) criteria.Two researchers who were blinded to the group assignments and not involved in the clinical procedures evaluated the restorations. Ten representative photographs for each criterion were used to calibrate the researchers. Then, researchers assessed 10–15 restorations at two consecutive appointments. Intra- and inter-examiner agreement of at least 85% was necessary to begin the evaluation. Subjects were not informed about the group assignments either.SPSS software (version 22.0; IBM Corp., Armonk, NY, USA) was used for statistical analyses. To compare the restorative materials, Pearson chi-square tests were conducted at each recall. Differences in the ratings of the two materials were assessed at 6 and 12 months. Cochran’s Q test was used to examine the changes over time for each material. McNemar’s test was used to compare the marginal adaptation, discoloration, and surface texture scores of each material with their baseline scores across various time points. Additionally, Kaplan-Meier analysis was performed to compare the survival rates of the restorations. The level of significance was set at p < 0.05.