select the option "more than one factor" if it applies Please select one high titers of cariogenic bacteria poor oral hygiene prolonged nursing (bottle or breast) poor family dental health developmental or acquired enamel defects teeth genetically abnormal many multisurface restorations chemotherapy or radiotherapy eating disorders drug or alcohol abuse irregular dental care cariogenic diet active orthodontic treatment exposed root surfaces restoration overhangs and open margins unavailability of performing proper oral health care xerostomia low socioeconomic status more than one of the above none of the above