Perbedaan Nilai Rata-Rata Jarak Foramen Mental Terhadap Puncak Tulang Alveolar Pada Radiograf Panoramik Pasien Laki-Laki dan Perempuan Usia 20-40 Tahun di RSKGM FKG UI = Difference between Mean Distance of Mental Foramen to Alveolar Crest in Male and Female Aged 20-40 Years Old on Digital Panoramic Radiograph at RSKGM FKG UI