Prevalence of distolingual root of mandibular first molar in periodontal disease patient in Taiwan

 
林喬棣▲   黃仁勇   王榆嘉   吳興國   江正陽   沈一慶   傅鍔
中華民國家庭牙醫學會

 
          The majority of Caucasian first molars are two rooted with three canals.The major variant in this tooth type is the presence of an additional third root; a supernumerary root which can be found lingually. This macrostructure, which is first mentioned in the literature by Carabelli (1844). In Caucasian and African people, the prevalcence are less than 5%. But a frequence of 5% to more than 40%in the populations with mongoloid traits. This study is designed to evaluate the prevalence of distolingual root in periodontal disease patient of Chinese population in Taiwan.