IADR Abstract Archives
Evaluation of C-Shaped Root Canal of Mandibular Second Molars in a Vietnamese Subpopulation Using Conebeam Computed Tomography.
Objectives: C-shaped root canals in mandibular second molars pose a challenge to ensuring successful endodontic treatment because the connecting root canal is not the same from the orifice to apical foramen. In clinical practice, use of conventional dental radiographs fails to explore the C-shaped canal, owing to limitations of 2D expression. Alternatively, conebeam CT has allowed clinicians to achive a thorough understanding of the 3D morphology of root canal system. This study investigates the prevalence and morphology of C-shaped canals in mandibular second molars in a Vietnamese subpopulation.
Methods: A total of 580 Vietnamese patients’CBCT images were screened and 936 mandibular second molar were evaluated. Based on 3D expression, the root canal systems of all mandibular second molars are examined as well as the length of the root analysis results. The C-shaped root canal cross sections were recorded as C1, C2, C3, and C4 root canal configurations according to the Fan (2004) classification. The incidence of C-shaped root canal second mandibular molars were recorded and analyzed.
Results: The incidence of C-shaped root canals were 25.0%. There was significantly greater incidence of C-shaped root canal in mandibular second molars in females than in males, p=2.224e-06. However, positions did not show a significant relationship with this variant occurrence in mandibular second molars. The bilateral incidence of C-shaped root canals in mandibular second molars were 19.11%; 59.85% of the C-shaped root canal cases were bilateral. The analysis of the cross-sectional morphology showed that almost (88.03%) C-shaped root canal revealed an uninterrupted C configuration in cervical third.
Conclusions: Clinicians should be aware of the high incidence of C-shaped root canals in mandibular second molars in Vietnamese population. Conebeam CT is a useful tool for determining root and root canal morphology.
Methods: A total of 580 Vietnamese patients’CBCT images were screened and 936 mandibular second molar were evaluated. Based on 3D expression, the root canal systems of all mandibular second molars are examined as well as the length of the root analysis results. The C-shaped root canal cross sections were recorded as C1, C2, C3, and C4 root canal configurations according to the Fan (2004) classification. The incidence of C-shaped root canal second mandibular molars were recorded and analyzed.
Results: The incidence of C-shaped root canals were 25.0%. There was significantly greater incidence of C-shaped root canal in mandibular second molars in females than in males, p=2.224e-06. However, positions did not show a significant relationship with this variant occurrence in mandibular second molars. The bilateral incidence of C-shaped root canals in mandibular second molars were 19.11%; 59.85% of the C-shaped root canal cases were bilateral. The analysis of the cross-sectional morphology showed that almost (88.03%) C-shaped root canal revealed an uninterrupted C configuration in cervical third.
Conclusions: Clinicians should be aware of the high incidence of C-shaped root canals in mandibular second molars in Vietnamese population. Conebeam CT is a useful tool for determining root and root canal morphology.