@article{JIA2017, 
author = {Rui-zhi JIA and Dong-mei YANG and Jia-jian SHANG},
title = {Clinical study of root canal numbers in maxillary second primary molars},
year = {2017},
journal = {Journal of Prevention and Treatment for Stomatological Diseases},
volume = {25},
number = {5},
pages = {316-319},
keywords = {Maxillary second primary molars, Root canals number, Second mesiobuccal canal, Root canal therapy, Root canal variation},
url = {https://www.sciopen.com/article/10.12016/j.issn.2096-1456.2017.05.008},
doi = {10.12016/j.issn.2096-1456.2017.05.008},
abstract = {ObjectiveTo investigate the root canal numbers of maxillary second primary molars.Methods216 maxillary second primary molars from 204 children aged 3-8 years old were selected. All the teeth need to do the root canal therapy. After opening the pulp chamber, the root canal were examined and determined with small size K file and 17% ethylene diaminetetraacetic acid (EDTA). Hand instruments were used for root canal preparation and then zinc-oxide iodoform paste was used for filling.Results216 maxillary second primary molars, 122 teeth had three root canals (56.5%), and 94 teeth had four root canals (43.5%). The incidence of second mesiobuccal canal (MB2) was 41.2%. There was no correlation between the incidence of the MB2 canal and gender and tooth position.ConclusionThe root canals of maxillary second primary molars had more variations, and there was a high incidence of the second mesiobuccal canal.}
}