Prevalence and intraoral distribution of dentin hypersensitivity among students.

The exposed dentin which is the result of the consequence of the enamel loss (by erosion, abrasion, attrition), gingival recession or periodontal therapy, as well as anatomic defects often as its result has dentinal hypersensitivity. The purpose of this work is to examine the frequency of dentinal hypersensitivity in relation to the subjective estimation of the examined persons and objectively, by intraoral examination. Forty persons, students from the School of dentistry of average age of 22.35 years were tested and analysed. Subjective data are achieved by the method of questionnaire while the objective ones by pulling the probe in the area of the tooth neck for the purpose of mechanical testing and by air syringe for the cold stimulus. The results show that the clinical hypersensitivity amounts 52.5% in relation to the subjective data 32.5%. The duration of hypersensitivity amounts in average 18 months and the strongest way of its demonstration is the cold and mechanical stimulus. The half of the examined brush their teeth twice a day out of which 72.5% do that by the half hard nylon brush, and the percentage of teeth with cuneiform defects amounts to 4.45. The often phenomenon of dentin hypersensitivity already among the young underline the need of preventive action and removing the damaging factors which contribute to the start of hypersensitivity of the nude dentin.