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Fractographic Failure Analysis of a Broken Tooth Following Larnygoscopy



Janet Quinn, L W. Schultheis


ckground: A tooth broken subsequent to laryngoscopy was fractographically analyzed. The science of fractography involves examination of fracture surfaces to determine information such as failure causes, crack progressions, and stress configurations.Case description: Fractographic examination of a maxillary canine root fragment revealed step-wise crack progression, evidence of bruxism and the approximate location and direction of the applied critical force. A force applied to an available discarded tooth, coated and embedded to simulate in vivo conditions, supported the fractographic findings.Clinical Implications: This study shows that fractographic analysis can be successfully applied to human dentition, and uncovers bruxism as a potential significant factor in dental injury in intubated patients.
Journal of the American Dental Association


bruxism, fractography, intubation, tooth fracture


Quinn, J. and Schultheis, L. (2008), Fractographic Failure Analysis of a Broken Tooth Following Larnygoscopy, Journal of the American Dental Association (Accessed February 25, 2024)
Created October 16, 2008