IADR Abstract Archives
Cone-beam computed tomography study of root and canal morphology of maxillary and mandibular molars in a Tunisian population
Objectives: The aim of this retrospective study was to investigate the number of roots and the configuration of the root canal system of the permanent maxillary and mandibular molars in a Tunisian population using cone-beam computed tomography (CBCT).
Methods: CBCT images of 400 permanent teeth from database previously evaluated were inspected. One hundred teeth for each 1st and 2nd maxillary and mandibular molars (MxM & MM) were considered. The number of roots was identified and the Vertucci’s classification and its supplemental configurations were performed to classify root canal configurations.
Results: Considerable variations were found in the number of roots and the types of root canal configuration.
For the1st and 2nd Maxillary Molars, three roots were found in 99% and 86 %, respectively. The incidence of fusion of any two or three roots was approximately 8%. Root changes were present in the 2nd molar than in the 1st one. The majority of three-rooted 1st and 2nd molars exhibited a type I configuration in all the three roots, The other types of classifications are of descending order type IV, II and type III. The mesiobuccal root of the Mx1Ms and Mx2Ms had two root canals in 26% and 11% of cases, respectively. Curved roots and C-shaped canals were found mostly in the 2nd molars (13%) than in the 1st ones (1%).
For MMs, the majority of 1st and 2nd molars had two roots (98% and 90%, respectively). For teeth with two roots, the majority of the mesial root displayed the type IV configuration, while the distal root had the type I configuration in the both of first and second molars. The other types of Vertucci' s classification were found in descending order: type I, II, V and type III.
Conclusions: Within the limits of this study, it can be concluded that there are variations in root numbers and canals configurations of molars in the studied population. Cautions should be taken before the initiation of a root canal treatment.
Methods: CBCT images of 400 permanent teeth from database previously evaluated were inspected. One hundred teeth for each 1st and 2nd maxillary and mandibular molars (MxM & MM) were considered. The number of roots was identified and the Vertucci’s classification and its supplemental configurations were performed to classify root canal configurations.
Results: Considerable variations were found in the number of roots and the types of root canal configuration.
For the1st and 2nd Maxillary Molars, three roots were found in 99% and 86 %, respectively. The incidence of fusion of any two or three roots was approximately 8%. Root changes were present in the 2nd molar than in the 1st one. The majority of three-rooted 1st and 2nd molars exhibited a type I configuration in all the three roots, The other types of classifications are of descending order type IV, II and type III. The mesiobuccal root of the Mx1Ms and Mx2Ms had two root canals in 26% and 11% of cases, respectively. Curved roots and C-shaped canals were found mostly in the 2nd molars (13%) than in the 1st ones (1%).
For MMs, the majority of 1st and 2nd molars had two roots (98% and 90%, respectively). For teeth with two roots, the majority of the mesial root displayed the type IV configuration, while the distal root had the type I configuration in the both of first and second molars. The other types of Vertucci' s classification were found in descending order: type I, II, V and type III.
Conclusions: Within the limits of this study, it can be concluded that there are variations in root numbers and canals configurations of molars in the studied population. Cautions should be taken before the initiation of a root canal treatment.