Evaluation the prevalence of permanent anterior crown fracture and its relevant between 7-14 years students in Tehran, year of 1375

Anterior tooth crown fracture in children is something that each dentist will confront"nmany times during his professional career."nWe studied the prevalence of anterior teeth crown fractures between 7-14 years old students in"nTehran and some relevant factors like sex, age, the traumatized tooth, amount of overbite and"noverjet, upper lip coverage, jaw that had fractured tooth or teeth and place of fracture in fractured"ncrown."n1338 boys and 1184 girls were in this study. Tooth fracture was almost the same in boys and"n1184 girls with the prevalence of 8%. Fracture was mostly in enamel and average year of"nfracture was 10 years."nIncreased overjet and overbite had direct relation and indirect relation with fracture, also enough"nlip coverage showed less fracture