RESULTS The results derived from the statistical analysis of the differences between the three veneer types such as DCV, ICV, and CLV across various criteria at 3, 6, and 12 months [ Table 1 ] are as follows: Marginal discoloration: The total number of events which occurred for marginal discoloration was 8, 14, and 28 at 3, 6, and 12 months, respectively, which were statistically highly significant, P < 0.001.
On the other hand, Gradia HIPS used in ICVs contains Urethane Dimethacrylate (UDMA) and higher filler content, which results in a denser network less prone to staining.[ 15 ] The complete absence of discoloration in CLVs, likely due to the dense crystalline structure of lithium disilicate and a glazed surface, is consistent with previous studies showing that ceramic veneers outperform composites in long-term esthetics.[ 16 , 17 ] Postoperative sensitivity was infrequent but exclusively occurred in the DCV group (three cases total), showing a trend toward significance.