PENGARUH LAMA PEMBERSIHAN DENGAN ENERGI MICROWAVE TERHADAP KEKASARAN PERMUKAAN BAHAN BASIS GIGI TIRUAN RESIN AKRILIK POLIMERISASI PANAS: EFFECT OF DISINFECTION DURATION BY MICROWAVE ENERGY ON SURFACE ROUGHNESS OF A HEAT-POLYMERIZED DENTURE BASE ACRYLIC RESIN (TALENTA, 2012)