Predictor Mandibular Dentoalveolar Features on the Occurrence of 1-Rooted/C-Shaped Mandibular Second Molar Teeth

Objective:This study aimed to examine the mandible form features of the mandible, such as inter -second molar width, anteroposterior length, arch perimeter length, arch breadth, corpus height/width in the mandibular second molars (MnSM) region, and arch form, and the relation for the occasion of the 1-rooted/C-shaped. Methods:The study analyzed cone -beam computed tomography images of 215 male and 215 female Turkish patients to determine the prevalence of 1 -rooted and C -shaped MnSM. Mandibular dentoalveolar characteristics of individuals with bilateral (1R -1R group) and unilateral (1R -2R group) 1 -rooted MnSM were examined and compared with those with bilateral 2 -roots (2R -2R group) MnSM. Statistical tests were performed using Chi-square, one-way ANOVA, Tukey, and binary logistic regression analysis at the 5% significance level. Results:The prevalence of 1 -rooted and 1-rooted/C-shaped MnSM was 12.79% and 9.65%, respectively. Root fusion was more commonly present in females (p<0.05). In the 1R -1R group, the anteroposterior length was shorter than in the 2R -2R group (p<0.05). There was no difference between the groups for other features (p>0.05). Conclusion: Although the study found a shorter anteroposterior length in the 1R -1R group, no feature was a predictive variable for 1-rooted/C-shaped MnSM.