“…In most trials, psychiatric patients last visited a dentist for more than one year previously 17,46,59,68,70,71 , and the main quoted reason was fear of dental interventions 17,71 . When it comes to oral hygiene of psychiatric patients, most studies point out that they irregularly maintain oral hygiene during hospitalization 4,6,17,19,27,46,48,59,60,71,72 , not apply proper brushing technique 27,59 , and do not usually have oral hygiene aids 68 .…”