Rahmat Hidayat and Helmi Fatchurrahman 2021. The Effect of Silica Dioxide (SiO2) Nanoparticle Coating and Duration of Coffee Immersion on Discoloration of Thermoplastic Nylon Denture Base. DENTA JURNAL KEDOKTERAN GIGI. 14, 1 (Aug. 2021), 38–43. DOI:https://doi.org/10.30649/denta.v14i1.6.