Distribusi frekuensi karies gigi molar dua terkait impaksi gigi molar tiga rahang bawah berdasarkan kelompok usia dan jenis kelamin pada pasien odontektomi RSKGMP FKG UI periode januari 2014-Desember 2016 = Frequency distribution of caries on second molars associated with impacted mandibular third molars based on age group and gender in RSKGMP FKG UI patients period of January 2014 December 2016