• J Formos Med Assoc · Dec 2023

    Incidence and contributing factors of non-root canal treated teeth with chronic fatigue root fracture: A cross-sectional study.

    • Shue-Fen Yang, Yan-Wen Chen, Chia-Lun Tsai, Han-Chieh Cheng, Shang-Liang Wu, Aviad Tamse, and Yi-Ching Ho.
    • Division of Endodontics and Periodontology, Department of Stomatology, Taipei Veterans General Hospital, Taipei, Taiwan; Department of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan.
    • J Formos Med Assoc. 2023 Dec 1; 122 (12): 133813441338-1344.

    Background/PurposeChronic fatigue root fracture describes a root fracture in a non-root canal treated (non-RCT) tooth. This study aimed to report the incidence and contributing factors of non-RCT teeth with chronic fatigue root fracture in a Taiwanese population.MethodsThis cross-sectional study included teeth extracted at Taipei Veterans General Hospital in Taiwan between 2018 and 2019. The reasons for extractions were recorded and included vertical and horizontal root fractures (VRF and HRF). Comparisons of clinical factors between teeth with fatigue VRF and teeth with fatigue HRF were performed by chi-square or Fisher exact test, where appropriate.ResultsOf the 4207 extracted teeth examined, 263 (6.25%) had tooth fracture. Thirty-two non-RCT teeth had chronic fatigue root fracture, including 16 with VRF and 16 with HRF. The incidence was 0.76% (32/4207). The occurrence of chronic fatigue root fracture was higher in males (83.9%). The mean age of the 31 patients with chronic fatigue root fracture was 71.7 ± 13.1 years. More than half of these teeth had intact crowns with severe attrition. The fatigue VRF occurred more frequently in molars (P = 0.003), in roots with a long oval cross-section (P = 0.037), and in terminal teeth (P = 0.013) than the fatigue HRF.ConclusionThe incidence of chronic fatigue root fracture is 0.76%. Both VRF and HRF occur mainly in aged males, in posterior teeth with attrition, and in teeth without restoration. Tooth position, cross-section root morphology, and terminal tooth are contributing factors related to chronic fatigue root fracture.Copyright © 2023 Formosan Medical Association. Published by Elsevier B.V. All rights reserved.

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