Evaluation of the Prevalence of Endo-Periodontal Lesions According to the New Classification of Periodontal and Peri-Implant Diseases

Objective: The study aimed to determine the prevalence of endo-periodontal lesions (EPL) in individuals with periodontitis, to evaluate these lesions according to the new Classification of Periodontal and Peri-Implant Diseases and Conditions (2017-Classification), and to investigate the relationship of EPLs with various parameters. Methods: The files of patients diagnosed with periodontitis were retrospectively evaluated in terms of age, gender, periodontal disease stage, EPL grade, number of EPL, radiographic shape, oral location, caries, presence of restoration, and furcation involvement of the tooth with EPL. Results: EPL was detected in 77 patients, consisted of 35 females and 42 males (mean age: 43.97±11.60), from a total of 800 patient files in the study. It was determined that the patients mostly received Stage III (n=43, 55.8%) in terms of periodontal diagnosis, and the teeth diagnosed with EPL had mostly Grade 3 (n=50, 64.9%) and cone-shaped (n=49, 63.6%) according to radiographic appearance. It was determined that EPL was mostly detected in mandibular molars (n=32, 41.6%), and the majority of teeth with EPL did not have root canal treatment (n=63, 81.8%), a prosthetic restoration (n=59, 76.6%), or caries (n=58, 75.3%). No significant difference was found between age groups and genders in terms of EPL number, grade, radiographic shape, and localization. In addition, there was no statistically significant difference between the number of teeth with EPL and the stage of periodontal disease. Conclusion: Prevalence of EPL was 9.62% in this study. Within the limitations of this study, it can be stated that according to the 2017-Classification, the number, grade, radiographic shape, and localization of EPL in periodontitis patients did not differ according to gender and age ranges. EPL was observed more in Stage III periodontitis patients and in mandibular molar teeth, and the rate of EPL-Grade 3 and radiographic images with cone-shaped was higher in these patients.