OPRM1 and mucositis: After revisiting and expanding the Socransky complex, Fernandes et al. proposed the GF-MoR complex and found that important species in peri-implant mucositis included Prevotella spp., P. gingivalis, T. forsythia, T. denticola, Actinobacillus actinomycetemcomitans, and F. nucleatum, all of which are Gram-negative, with a relatively small percentage of other species (Fernandes et al., 2024).