Perbandingan prevalensi periodontitis dan karies dentis, serta pengetahuan, sikap, perilaku kesehatan gigi mulut pada ibu hamil yang mengalami persalinan preterm dengan ibu bersalin spontan di Rumah Sakit Umum Pusat Nasional Cipto Mangunkusumo = Comparison of the prevalence of periodontitis and dental caries and knowledge attitude and behavior about oral health between women with preterm labor and spontaneous labor in Cipto Mangunkusumo Hospital / Ferry Darmawan