Radiographic Evaluation for the Prevalence of Taurodontism in Iranian Population in 2018

Background and aim: taurodontism is one of the morpho-anatomical changes in the shape of one or more molars or pre molars. in this situation; the tooth's pulp chamber grows as big as the size of the root length. the purpose of this study is to evaluate the prevalence of taurodont teeth by the use of panoramic radiographs.methods: this is a cross-sectional study which is done on panoramic radiographs of the patients referring to dental school clinic. 493 panoramic radiographs for the patients age between 10 to 60 was evaluated randomly. the teeth were evaluated based on the criteria described by schiffman and chanelle. in order to determine the general prevalence of taurodontism, the proportion of taurodont teeth was calculated to the total number of subjects and was reported in percentage of cases. to compare the prevalence of taurodontism in maxilla and mandible and in left or right sections, chi-square test was used. also for determining the difference of severity of taurodontism in jaw and quarted chi-square test was administered.results: 23 patients (67.4%) and (49.3%) of studied teeth, had taurodontism. according to chi-square test, there is no meaningful relationship between gender variables and prevalence of taurodontism (p value = 0.267) the most prevalence of taurodontism was 83,47% simultaneously in maxillary right first and second molars, mandibullary left first and second molars and as so maxillary left first molar and mandibular right first molar with 35,4% had the lowest prevalence.conclusion: in this study taurodontism was recognized in 23patients. the prevalence is estimated 67.4%.