{Reference Type}: Journal Article
{Title}: Root canal conicity determination of primary second molars using nanotomography: An in vitro study.
{Author}: Lucisano MP;Ramos GT;Blanco-Victorio DJ;Ramírez-Sotelo LR;Lima RB;Nelson-Filho P;da Silva RAB;Miranda JA;da Silva LAB;
{Journal}: Int J Paediatr Dent
{Volume}: 0
{Issue}: 0
{Year}: 2024 Apr 26
{Factor}: 3.264
{DOI}: 10.1111/ipd.13198
{Abstract}: <B>BACKGROUND: </B>The conicity of the root canals of primary teeth is an important measure for endodontic therapies. However, determining this conicity depends on the methods employed, which requires further investigation.<BR><B>OBJECTIVE: </B>The aim of this study was to determine the conicity of the root canals of the upper and lower primary second molars using nanotomography (nCT).<BR><B>METHODS: </B>An in vitro study was performed using nine primary second molars, both upper and lower, subjected to nCT. Comparisons between the diameters of root canals were performed between the thirds (cervical-D0, middle-D5, and apical-D7). The conicity (%) was determined for each root canal from cervical to apical. Data were statistically analyzed with a significance level of 5%.<BR><B>RESULTS: </B>The conicity ranged from 2% to 8% for the upper primary second molars. Significant differences in root canal diameter between the thirds (D0, D5, and D7 points) were observed in the mesio- and distobuccal roots (p < .05), but not in the palatal roots (p > .05). For the lower primary second molars, the conicity ranged from 2% to 17%, as well as significant differences in root canal diameter between the thirds (D0, D5, and D7 points) were observed in all roots (distal, mesiobuccal, and mesiolingual; p < .05).<BR><B>CONCLUSIONS: </B>The conicity of the upper primary second molars was different from that of the lower ones, which showed a greater variability.