title: Difference in physiological responses to sound stimulation in subjects with and without fear of dental treatments.
abstract: The effects of sound generated by an ultrasonic dental scaler and a dental turbine on heart rate, systolic and diastolic blood pressure, and hemodynamic changes in the frontal cortex were measured and compared with those of pure tone stimulation in 17 young volunteers. Near-infrared spectroscopy and the Finapres technique were used to measure hemodynamic and cardiovascular responses, respectively. The dental sound changed the various physiological parameters. To determine if this change was related to participants' previous experiences with dental treatment, participants were divided into two groups: those who had a previous unpleasant experience with dental treatment and those who had not. Participants with previous unpleasant dental experiences showed a significant decrease in cerebral blood flow. Participants who had not had an unpleasant dental experience did not show significant changes in cerebral blood flow. Thus, although sounds associated with dental treatment may reduce cerebral blood flow, this effect may depend on the dental experiences of the patient. It is recommended that dentists treat patients gently and with empathy to promote a friendly image of dentistry.
authors.affiliation: Division of Oral Physiology, Department of Oral Biological Science, Niigata University Graduate School of Medical and Dental Sciences, 2-5274 Gakkocho, Niigata, 951-8514, Japan.
authors.forename: Takumu
authors.initials: T
authors.lastname: Kudo
authors.forename: Riho
authors.initials: R
authors.lastname: Mishima
authors.forename: Kensuke
authors.initials: K
authors.lastname: Yamamura
authors.forename: Rahman
authors.initials: R
authors.lastname: Mostafeezur
authors.forename: Hossain Md
authors.initials: HM
authors.lastname: Zakir
authors.forename: Masayuki
authors.initials: M
authors.lastname: Kurose
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Yamada
mesh_terms: D000161:Acoustic Stimulation; D000328:Adult; D001301:Audiometry, Pure-Tone; D001794:Blood Pressure; D002560:Cerebrovascular Circulation; D016854:Dental Anxiety / Q000503:physiopathology*; D003754:Dental High-Speed Equipment; D012534:Dental Scaling; D006339:Heart Rate; D006801:Humans; D008297:Male; D010108:Oxyhemoglobins / Q000032:analysis; D013018:Sound Spectrography; D019265:Spectroscopy, Near-Infrared; D014464:Ultrasonic Therapy
chemical_list: D010108:Oxyhemoglobins