Influences of TiO2 and SiO2 nanofillers on the hardness and surface roughness of maxillofacial silicone elastomers after two years of outdoor tropical weathering: An in vitro study. - Mousa, Mohammed; Elmarhoumy, Belal; Salloum, Mahmoud; Zwiri, Abdalwhab; Sghaireen, Mohammed; Bahattab, Thamir; Almutairi, Ahmed; Almuzaini, Njoud; Abdullah, Johari (PLoS ONE, 2026)