Background This in vitro investigation aimed to evaluate and contrast the surface roughness of various implant superstructure materials before and after tooth brushing simulation. Objectives To evaluate the surface roughness of G1- PMMA Polymethyl Methacrylate G2- Polychrome composite and G3- Direct Metal Laser Sintering DMLS glazed Porcelain-Fused-to-Metal PFM restorative materials b... https://www.roneverhart.com/Ferrofish-A32pro-32-Channel-AD-DA-Converter-with-MADI-and-ADAT-p18115/