CBCT based study to analyze and classify root canal morphology of maxillary molars - A retrospective study.

OBJECTIVE: The study aims to evaluate maxillary molars' root and root canal morphology among the Saudi population using Cone-Beam Computed Tomography scanning (CBCT). SUBJECTS AND METHODS: Retrospectively, the CBCT scans of 483 Saudi nationals were evaluated to identify the number of roots and root canals in maxillary first and second molars. The records were tabulated and classified according to Vertucci and a new system for root and canal classification given by Ahmed and Dummer. Fisher's exact test was used to analyze the data statistically. To check for symmetry, comparisons were made between all the maxillary first molars (MFM's) and maxillary second molars (MSM's) on opposing quadrants. Inter Observer variability was seen using Cohen's Kappa test. RESULTS: MFM's presented with three roots with Type II Vertucci canal configuration (VC) commonly seen among them. MSM's had more variations in the number of roots and canals, although three roots and Type I VC were predominantly seen. When comparing the two genders statistically significant difference was observed in both maxillary molars at a 5% level using Fisher's exact test. Three roots with four canals (3R4C) were predominantly observed in the MFM's (85.6%) and three roots with three canals (3R3C) identified in 51.95% were more common than 3R4C (43.55%) in MSM's. Both the maxillary molars bilaterally, exhibited a high percentage of symmetry in root and canal configurations. CONCLUSIONS: Identification of root canal morphology of molars would reduce the chances of root canal failures by making sure all canals are obturated. This study provides supplemental information about the root canals of maxillary molars in a Saudi Arabian subpopulation.

Management of a 20-year-old longstanding oroantral fistula: A case report and review of literature.

A systematic treatment plan and an appropriate selection of surgical technique are the critical requirements for an effective closure of oroantral fistula (OAF). A 45-year-old female patient had sinus opening after she underwent a surgical tooth extraction 20 years back. On her frequent visits to the dentists some attempts were made for closure including surgical intervention, only for the lesion to return back. Computerized tomography (CT) scan was taken to rule out any bony extension of a lesion, the CT revealed a 1 × 1 cm radiolucency with a through - through communication from the alveolar bone to the right maxillary sinus because of the bony defect in the floor of maxillary sinus along with thickening of the maxillary sinus lining. The closure of the defect was done by a lateral pedicle flap raised from the right side was elevated and laterally slid to cover the defect without tension and was sutured with 4-0 resorbable interrupted suture while maintaining a bare surgical bed covered by the periosteum and a thin layer of connective tissue. This technique provides immediate repair of the defect to the patient, and also maintains comparatively normal anatomic architecture to the oral cavity. Eight months postoperative follow-up revealed a complete closure of OAF without any complications. The findings of this case suggest that lateral sliding pedicle flap can be a conservative approach in managing a long-standing OAF.