Prevalence of dens invaginatus and palatogingival groove in North India: A cone-beam computed tomography-based study.

Aim: The aim of this study was to study the prevalence of dens invaginatus (DI) and palatogingival groove (PGG) in maxillary lateral incisors, and the occurrence of apical periodontitis in association with these anomalies in North Indian population. Methodology: Maxillary lateral incisors in 163 cone-beam computed tomography scans were assessed to determine the presence of DI and PGG. Anomalies identified were then classified as per Oehler's and Gu's classification, respectively. Their side and gender predilection and association with apical and lateral radiolucency was also studied. Statistical Analysis: Descriptive data were reported as percentages. Chi-square analysis was used to determine the association with gender and side predilection. Results: DI was present in 13.5% of the scans, while PGG was present in 7.3% of the scans. No significant gender and side predilection was observed. 6.67% of lateral incisors with DI and 25% of lateral incisors with PGG had an associated apical radiolucency. 33.33% of lateral incisors with PGG had an associated lateral radiolucency. Conclusions: There is a high prevalence of DI and PGG in maxillary lateral incisors.

Evaluation of the Dimensions of Anterior Loop of Mental Nerve in CBCT: A Radiographic Analysis.

BACKGROUND: Information on the dimensions of the anterior loop of mental nerve is important for dental implant placement. AIMS: The purpose of this study was to determine the total length of anterior loop of mental nerve from the mental foramen. MATERIALS AND METHODS: CBCT data of 150 patients were evaluated. RESULTS: We found that the anterior loop was absent in 56.4% of patients on the left side and 61.7% patients on the right side. 19.5% of the total patients (29 patients) had up to 4 mm length of the loop which was exactly same on both right and left sides. The remaining 16.8% on the left side (25 patients) and 14.1% on the right side (21 patients) had the length of the loop ranging between 4.1 and 8 mm. The rest 7.4% of patients on the left side and 4.7% patients on the right side had more than 8 mm of the loop length. CONCLUSIONS: Based on this study, the dimensions of the anterior loop are variable and hold great significance in dental implant planning in the mandibular premolar region.