Prevalensi indikasi ekstraksi gigi permanen pada pasien RSKGM FKG UI periode 1 Januari 2012-31 Desember 2014 = Prevalence of permanent teeth extraction indication in the patients attending dental hospital of Universitas Indonesia periods January 1st 2012 December 31st 2014 ([, Fakultas Kedokteran Gigi Universitas Indonesia], 2015)