DISTRIBUSI MALOKLUSI BERDASARKAN KLASIFIKASI ANGLE PADA PASIEN DI DEPARTEMEN ORTODONSIA RSGMP FKG USU TAHUN 2009-2013 (DISTRIBUTION OF MALOCCLUSION BASED ON ANGLE CLASSIFICATION IN PATIENT ATTENDING THE ORTHODONTICS DEPARTMENT RSGMP FKG USU IN 2009-2 - Lubis, Mimi Marina (Fakultas Kedokteran Gigi USU, 2017)