Nahsan, F.P.S., Schmit, V.L., Naufel, F.S., Faria e Silva, A.L. and Chaves, L.P. 2015. Thirteen-year follow up of a conservative approach for closing diastema in anterior teeth with composite resin . Bioscience Journal . 31, 4 (Jun. 2015), 1291–1295. DOI:https://doi.org/10.14393/BJ-v31n4a2015-29543.