PURPOSE: This study used cone-beam computed tomography (CBCT) to characterize mandibular molar root and canal morphology and its variability in Belgian and Chilean population samples. MATERIALS AND METHODS: We analyzed the CBCT images of 515 mandibular molars (257 from Belgium and 258 from Chile). Molars meeting the inclusion criteria were analyzed to determine (1) the number of roots; (2) the root canal configuration; (3) the presence of a curved canal in the cross-sectional image of the distal root in the mandibular first molar and (4) the presence of a C-shaped canal in the second mandibular molar. A descriptive analysis was performed. The association between national origin and the presence of a curved or C-shaped canal was evaluated using the chi-squared test. RESULTS: The most common configurations in the mesial root of both molars were type V and type III. In the distal root, type I canal configuration was the most common. Curvature in the cross-sectional image was found in 25% of the distal canals of the mandibular first molars in the Belgian population, compared to 11% in the Chilean population. The prevalence of C-shaped canals was 10% or less in both populations. CONCLUSION: In cases of unclear or complex root and canal morphology in the mandibular molars, CBCT imaging might assist endodontic specialists in making an accurate diagnosis and in treatment planning.
Belgium ; Cone-Beam Computed Tomography* ; Dental Pulp Cavity ; Diagnosis ; Molar* ; Prevalence ; Specialization

Most medical complications following acute stroke are preventable (such as cardiac events, pneumonia, bed sores and venous thrombosis). This was a study on the frequency of medical complications and their association with key performance indicators. Methods: The study used a cross-sectional baseline audit of stroke care practices. The audit captured details on the nature of the stroke, patient demographics, characteristics of hospital care, and compliance with six key quality indicators in Philippine Academy of Rehabilitation Medicine Clinical Practice Guideline on Stroke Rehabilitation. Patient records were retrospectively consecutively sampled. Results: A total of 1,683 patients were included in the audit which came from 49 hospitals. Medical complications were seen in 182 patients (11.2%). Pneumonia contributed to half the medical complications (50%), followed by respiratory failure (7.7%) and gastrointestinal bleeding (3.8%). Presence of medical complications were associated with in-patient mortality (OR 3.3 (95% CI 2.1-5.3)) and prolonged hospital stay (16.1 ± 20.7 days vs 9.6 + 10.9 days). The best predictor model for pneumonia included variables of not having a swallow screen within the first 24 hours, having a nasogastric tube inserted, not achieving medical stability, not having a stroke unit in the admitting hospital, having suffered a previous stroke and being older. Conclusion: Non-adherence to evidence-based stroke care rehabilitation guidelines contributed significantly to medical complications in an audit of Filipino stroke patients