Pablo J. AtriaCamila S. SampaioEduardo CáceresJessica FernándezAndré Figueiredo ReisMarcelo GianniniPaulo G. CoelhoRonaldo Hirata2026-03-222026-03-22201710.4012/dmj.2016-430https://doi.org/10.4012/dmj.2016-430https://andeanlibrary.org/handle/123456789/45080Citaciones: 33This study evaluated the influence of different light-curing modes on the volumetric polymerization shrinkage and degree of conversion of a composite resin at different locations using micro-computed tomography and Fourier transform infrared spectroscopy (FTIR). Specimens were divided into 4 groups based on the light-curing mode used (Bluephase 20i): 1 -High (1,200 mW/cm²); 2 -Low (650 mW/cm²); 3 -Soft-start (650-1,200 mW/cm²); and 4 -Turbo (2,000 mW/cm²). Degree of conversion was calculated by the measurement of the peak absorbance height of the uncured and cured materials at the specific wavenumbers, and was performed by FTIR 48 h after curing resin samples. Degree of conversion was analyzed using two-way ANOVA. No significant differences were observed independent of the region of the restoration investigated (p>0.05). Different curing modes did not influence volumetric shrinkage neither degree of conversion of class I composite resin restorations.enMaterials scienceShrinkageCuring (chemistry)Composite materialFourier transform infrared spectroscopyAbsorbanceComposite numberPolymerizationDegree (music)Adhesivearticle