Early Vertical Root Fractures Characteristics and Microcrack Evidence
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This research investigates the nature of vertical root fractures (VRFs) at their initial stages to determine if they originate from dentinal microcracks. The study collected teeth with early VRFs and analyzed them using in vitro observation and micro-CT scanning, focusing on fracture characteristics like location, direction, and width. The findings suggest that VRFs consistently begin in the middle portion of the root, starting from the root canal wall and extending bucco-lingually. These VRFs exhibit irregular and tortuous fracture lines, with variable widths, indicating a gradual development process. Ultimately, the study challenges the idea that dentinal microcracks are the primary cause of VRFs, suggesting they may be experimental artifacts. The research provides insights into the development of VRFs, indicating they start internally and progress outward.
Pan, X., Liu, W., Wang, C., Gao, A. & Lin, Z. Characteristics of vertical root fractures at early stages: Evidence that dentinal microcracks are an experimental phenomenon. Int. Endod. J. (2025) doi:10.1111/iej.14209.
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