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 2009-2013 - Mimi Marina Lubis (TALENTA, 2015)