Melgar XC, et al. – In this retrospective study, the researchers intended to examine the survival probability of selective caries removal (SCR) treatments in the primary teeth of children with high caries experience and factors potentially correlated with treatment failure. SCR demonstrated restricted survival when contrasted with other prospective clinical trials. Patient–related factors, particularly the young age and high caries experience of the children, might represent a challenge for restoration survival. Despite the caries removal technique or restorative material, cariogenic biofilm has a negative impact on the survival of restorations, probably by acting directly on material deterioration and, especially, on the development of new caries lesions of rapid progression.