Impact of polymerization and storage on the degree of conversion and mechanical properties of veneering resin composites

To investigate the degree of conversion (DC), Martens hardness (HM), elastic indentation modulus (EIT), and flexural strength (FS) veneering resin composites (SR Nexco Paste (NP), Ceramage Incisal (CI), Gradia Plus (GP); n=60/group) cured with different polymerization devices (bre.Lux Power Unit, Labolight DUO, Otoflash G171, LC-3DPrint Box, PCU LED; n=12/subgroup) after storage. G171 DUO showed increased DC/HM/EIT. CI presented lowest DC highest HM/EIT. NP Within Laboligth LED, FS was observed for CI. Storage did not affect DC/HM/EIT specimens or DUO. With storage showing an influence on tested parameters that otherwise superior results, time cannot be recommended. For composites, this study a high/low to coincide respectively low/high amounts fillers/mechanical properties.