Association between Endodontically Treated Maxillary and Mandibular Molars with Fused Roots and Periapical Lesions: A Cone-beam Computed Tomography Cross-sectional Study |
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| Affiliation: | 1. Department of Endodontics, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisbon, Portugal;2. Private Practice, San Diego, California;1. Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, Brazil;2. Department of Biological Sciences, Dental School of Bauru, University of São Paulo, Bauru, Brazil;1. Division of Endodontics, Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil;2. Division of Endodontics, Department of Odontology, School of Dentistry, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil;3. Division of Periodontics, Department of Prosthodontics and Periodontics, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil;4. Dental Research Division, Department of Periodontology, Guarulhos University, Guarulhos, São Paulo, Brazil;1. Department of Biosciences, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil;2. Department of Department of Dentistry, Endodontics, and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil;3. Department of Prosthodontics, University of São Paulo, Bauru, São Paulo, Brazil;4. Section of Head and Face Physiology, Department of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil;1. Department of Conservative Dentistry and Endodontics, Thai Moogambigai Dental College and Hospital, Dr. MGR Educational and Research Institute, Chennai, India;2. Dental Research Institute, Faculty of Dentistry, University of Toronto, Toronto, Ontario, Canada;3. Department of Dentistry, Mount Sinai Hospital, Sinai Health System, Toronto, Ontario, Canada |
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| Abstract: | IntroductionFused root variations of the root canal system increase the complexity of the inner root canal system anatomy. The aim of the present study was to determine, in in vivo conditions, the proportion of periapical lesions in association with endodontically treated maxillary and mandibular molars with fused roots presenting previous root canal treatment by assessing preexisting data via cone-beam computed tomographic volumes.MethodsA total of 1160 CBCT scans with an overall sample of 20,836 teeth were screened. A global count of 3701 maxillary molars and mandibular second molars were included in the study. The Cohen kappa test and interclass correlation coefficient tested the intra- and interrater reliability, respectively. The percentage of periapical lesions associated with molars with or without root fusion was determined. Proportions were expressed with 95% confidence intervals (CIs). The z test for proportions was used to analyze differences between subgroups, and an odds ratio was calculated in order to understand the association between periapical lesions and root configuration.ResultsFused molars presented a prevalence of periapical lesions in endodontically treated teeth of 74.0% (95% CI, 65.2%–82.8%), whereas nonfused molars had a proportion of periapical lesions in root canal–treated teeth of 69.5% (95% CI, 65.2%–73.8%; P > .05). Endodontically treated molars with fused roots presented with 1.3 higher odds of being associated with periapical lesions than endodontically treated molars with nonfused roots.ConclusionsA tendency of a higher proportion of periapical lesions was found in the fused rooted molars with a history of root canal treatment when compared with nonfused teeth; however, no statistically significant difference was noted. |
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| Keywords: | Cone-beam computed tomography fused teeth molars periapical disease periapical periodontitis root canal therapies |
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