Effectiveness of an integrated model of oral health-promoting schools in improving children's knowledge and the KAP of their parents, Iran.

Introduction: The aim of our study was to investigate the effect of an Oral Health Promoting School (OHPS) model on children's oral health in Iran.

Methods: This interventional quasi-experimental study was conducted in the academic year 2019-20 among 354 primary school students and their parents. A questionnaire including 17 questions was distributed among children before and 5 months after the program (The ranges of possible scores = 0-17).

Porcelain color alteration after orthodontic bonding using three different surface preparation methods.

Background: By increasing the number of adults seeking orthodontic treatment bonding orthodontic brackets to the surfaces other than intact enamel has become necessary. The purpose of this study was to evaluate the effect of three different surface preparation methods associated with orthodontic bonding on porcelain color alteration.

Materials And Methods: In this study forty-five porcelain discs (6- mm diameter, 2- mm thickness) were fabricated.